WO2025181160A1 - A unit dose laundry article - Google Patents

Abstract

The present invention is in the field of cleaning composition. Particularly it relates to a unit dose laundry article having a cleaning ingredient for providing improved cleaning performance. There is hence a need to provide a 'eco-friendly' detergent product in the form of a flexible solid laundry article, which provides cleaning efficacy at par with conventional detergent composition, is easy to use without impacting the dissolution profile of the article. The present invention provides a flexible solid unit dose laundry article comprising a cleaning ingredient, water soluble polymer and a water-insoluble disintegrant that provides improved cleaning performance. The flexible solid laundry article is 'eco-friendly' and dissolves quickly in water yet does not stick to each other during storage and is easy to use.

Description

P0000778 CPL 1 A UNIT DOSE LAUNDRY ARTICLE Field of the Invention 5 The present invention is in the field of cleaning composition. More particularly, the present invention relates to a unit dose laundry article having a cleaning ingredient for providing improved cleaning performance. Background of the Invention 10 Laundry compositions are commonly available in the form of powders, tablets, bars, and as liquid products. Nowadays consumers are increasing concerned about the environment impact of the products they purchase. They prefer ‘eco-friendly’ or ‘environmental-friendly’ products, i.e., the products 15 which contain natural or biodegradable ingredients or ingredients which are sourced through renewable routes or have lower impact on the environment when the product is made or used. Product in concentrated format is one of the known steps in this direction. Concentrated detergent compositions offers potential huge benefits arising from the reduced pack size which 20 has consequent reductions in transportation savings and environmental benefits. However, with concentrated products, such savings can be eaten away by very quickly by incorrect dosage. Even very small amounts of wastage of highly concentrated products can amount to substantial amounts of chemicals when one considers the huge number of consumers carrying out laundry operations regularly. A problem with concentrated liquids is that the liquids adhere to the dosing 25 device or to the container holding the liquid and is wasted. Known powder composition may leave less product residue, in the form of fines. However, this is still undesirable. CN107022425 A (Novartis Environmental Tech Co Ltd., 2017) discloses a composition comprising carboxymethyl cellulose, α-alkenyl sulphonate, alcohol ethoxylate, talc and plant 30 fragrance extract. Flexible solid laundry article such as laundry sheet is one of the emerging product formats which offers the convenience of accurate dosing and lesser wastage. Typically, laundry sheets known in the art are polyvinyl alcohol (PVA) based detergent sheets. However, polyvinyl alcohol 35 is mostly sourced through non-renewable routes. Further, it is observed that polyvinyl alcohol is P0000778 CPL 2 not compatible with certain ingredients which are included in conventional detergent products for improving cleaning performances and efficacy. Thus, the efficacy of such detergent sheets may be compromised compared to conventional detergent products. 5 There is hence a need to provide a ‘eco-friendly’ detergent product in the form of a flexible solid laundry article, preferably a laundry sheet which provides cleaning efficacy at par with conventional detergent composition, is easy to use without impacting the dissolution profile of the article. 10 Summary of the Invention The present inventors have found that a flexible solid unit dose laundry article comprising a cleaning ingredient, water soluble polymer and a water-insoluble disintegrant surprisingly provides for improved cleaning performance. The flexible solid laundry article is ‘eco-friendly’ and dissolves quickly in water yet does not stick to each other during storage and is easy to 15 use. The flexible solid laundry article provides enhanced cleaning efficacy without impacting the dissolution profile of the article. The flexible solid laundry article comprising a cleaning ingredient in combination with specific water-soluble polymer and a water-insoluble disintegrant dissolves quickly and this enables improved cleaning performance. 20 According to a first aspect of the present invention, provided is a flexible solid unit dose laundry article comprising: (i) a water-soluble polymer comprising a cellulose ether derivative wherein the cellulose 25 ether derivative has a degree of substitution greater than 1; (ii) a water insoluble disintegrant having a water absorption ratio greater than 1 when measured according to the ASTM D570 method; and, (iii) a cleaning ingredient; 30 wherein the flexible solid laundry article is free of polyvinyl alcohol or a copolymer of polyvinyl alcohol. Detailed Description of the Invention According to a first aspect of the present invention provided is a flexible solid laundry article 35 comprising cleaning ingredient, water-soluble polymer, and water insoluble disintegrant. P0000778 CPL 3 Flexible solid laundry article The flexible solid laundry article according to the first aspect of the present invention may be in the form but not limited to a sheet, multi-layered sheet having two or more sheet stacked on each other, a sealed pouch comprising the sheet which pouch encloses a solid detergent 5 composition and any other 3D article formed by sandwiching a composition in between two or more layers of the sheet. Preferably the flexible solid laundry article of the present invention can be provided in the form comprising one or more flexible, dissolvable, preferably porous sheets, wherein each of said10 two or more sheets is characterized by being an open-celled foam, a fibrous structure, or a non- fibrous structure. The porous sheet can be optionally bonded together via a bonding means (e.g., heat, moisture, ultrasonic, pressure, and the like). The term "solid" as used herein refers to the ability of an article to substantially retain its shape 15 (i.e., without any visible change in its shape) at 20°C and under the atmospheric pressure, when no external force is applied thereto. The term "flexible" as used herein refers to the ability of an article to withstand stress without breakage or significant fracture when it is bent at 90° along a center line perpendicular to its 20 longitudinal direction Preferably, such article can undergo significant elastic deformation and is characterized by a Young's Modulus of no more than 5 GPa, preferably no more than 1 GPa, more preferably no more than 0.5 GPa, most preferably no more than 0.2 GPa. The flexible solid laundry article is provided in unit dose format. The term” unit dose” herein 25 refers to a dose of a product suitable for single time use. The flexible solid laundry article according to the present invention is preferably a dissolvable solid article. By the term dissolvable it is meant that the article is capable of dissolving in the liquid, especially aqueous carrier, more specifically water. Water can be added to 1 to 100 parts 30 of the article, preferably from 5 to 50 parts, more preferably from 10 to 40 parts. The flexible solid laundry article provides a cleaning composition for laundering on dissolution in water. The term "sheet" as used herein refers to a non-fibrous structure having a three-dimensional shape, i.e., with a thickness, a length, and a width, while the length-to-thickness aspect ratio 35 and the width-to-thickness aspect ratio are both at least 5:1, and the length-to width ratio is at P0000778 CPL 4 least 1:1. Preferably, the length-to-thickness aspect ratio and the width-to thickness aspect ratio are both at least 10:1, more preferably at least 15:1, most preferably at least 20:1; and the length-to-width aspect ratio is preferably at least 1.2:1, more preferably at least 1.5:1, most preferably at least 1.:1, still more preferably 1.8:1. 5 The flexible solid laundry article is preferably porous and has a density preferably ranging from 0.050 g/cm³ about 0.4 g/cm³, preferably from 0.06 g/cm³, 0.3 g/cm³, more preferably from 0.07 g/cm³ to 0.2 g/cm³, most preferably from 0.08 grams/ cm³ to 0.15 cm³. 10 The flexible solid laundry article may comprise an area of print or embossed. Preferebly one or more of the sides of the flexible solid laundry article is printed or embossed. The area of print may cover the entire article or part thereof. The area of print may comprise a single colour or maybe comprise multiple colours, even three colours. The area of print may comprise pigments, dyes, bluing agents or mixtures thereof. The print may be present as a layer on the surface of 15 the flexible solid laundry article or may at least partially penetrate into the article. The flexible solid laundry article when present in the form of a multilayer structure may comprise at least two sheet, or even at least three sheet, wherein the sheets are sealed together. The area of print may be present on one sheet, or on more than one sheet, e.g. on two sheets, or even on three sheets. 20 The area of print may be achieved using standard techniques, such as flexographic printing or inkjet printing. Preferably, the area of print is achieved via flexographic printing. The area of print may be on either side of the article. The area of print may be purely aesthetic or may provide useful information to the consumer. 25 The embossing is preferably formed using an embossing roller and a pressing roller which cooperate with each other to form embossing. Preferably the embossing roller includes embossing protrusion formed on the outer circumferential surface and the preferably the pressing roller includes an embossing groove corresponding to the embossing protrusion and 30 the embossing groove is preferably formed on the outer circumferential surface thereof. Preferably the flexible solid laundry article comprises plurality of emboss. The flexible solid laundry article may be opaque, transparent, or translucent. P0000778 CPL 5 Preferably the final moisture content of the flexible solid laundry article ranges from 0.5 wt.% to 15 wt.%, still preferably from 1 wt.% to 12 wt.%, still more preferably from 3 wt.% to 10 wt.% by weight of the article. 5 Preferably the flexible solid laundry article has a thickness ranging from 0.2 mm to about 4 mm, preferably 0.4 mm to about 3.5 mm, more preferably from 0.7 mm to about 3 mm, still more preferably from about 0.8 mm to about 2 mm, also preferably from 1 mm to about 1.5 mm. Preferably the flexible solid laundry article has a basis weight ranging from 50 grams/m² to 250 10 grams/m², preferably from 80 grams/m² to 220 grams/m², still more preferably from 100 grams/m² to 200 grams/m². Preferably the flexible solid laundry article has a density ranging 0.05 grams/cm³ to 0.5 grams/cm³, preferably from 0.06 grams/cm³ to 0.4 grams/cm³, still more preferably from 0.07 15 grams/cm³ to 0.25 grams/cm³, most preferably from 0.08 grams/cm³ to 0.25 grams/cm³. Preferably the flexible solid laundry article comprises a perforation line or tear line or line on frangibility. The perforation line may be provided to separate measured unit dose portions. Alternately the flexible solid laundry article may include a first part and a second part separated 20 by a perforation line or tear line or line on frangibility. Preferably the flexible article is a sheet. Preferably, the first part comprises a first cleaning composition and the second part comprises a second cleaning composition, wherein the first and the second compositions are different from each other. For example, the first composition may be a laundry cleaning composition whereas the second composition may be a fabric conditioning or fabric treatment composition. The sheet 25 may be provided with more than two parts separated by perforation lines or tear lines. It may possible that each part has different colorant providing a visual cue to the consumers. Preferably each part can be separated by the perforation line or tear line and use thereon. Water-soluble polymer 30 The flexible solid laundry article comprises a water-soluble polymer. The water-soluble polymer acts as carrier or matrix for the format. The term water-soluble herein refer to a solubility value of at least 0.5% by weight in distilled water at 25°C. The water-soluble polymer comprises a cellulose ether derivative. The cellulose ether derivative 35 has a degree of substitution greater than 1. More preferably the degree of substitution is greater P0000778 CPL 6 than 1.1, still preferably greater than 1.2. Preferably the cellulose ether derivative has a degree of substitution ranging from greater than 1 to 2, still preferably 1.2 to 1.8, further preferably from 1.5 to 1.8. 5 Preferably, the cellulose ether derivative has a cellulose backbone and a functional ether group substitution. Preferably the functional ether group is selected from the group consisting of methoxy group (-OCH₃), hydroxypropoxyl group (-OCH₂CHOHCH₃), hydroxyethoxyl group (- OCH₂CH₂OH) and mixtures thereof. 10 Preferably the cellulose ether derivative suitable for the invention are readily soluble in water at 25 °C. The term “readily soluble” herein implies that the polymer dissolves in water in room temperature thereby providing a visually clear or transparent solution, without leaving any lump in the solution. Visually clear or transparent herein, refers to a solution having a turbidity value less than 50 NTU (Nephelometric turbidity unit). 15 Typically, cellulose ether derivatives are obtained by substituting one or more hydrogen atoms of hydroxyl groups in the anhydro-glucose units of cellulose with alkyl or substituted alkyl groups. Degree of substitution (DS) is one of the factors, that define the properties of cellulose ether derivatives, particularly, solubility in water. It is defined as the number of substituted 20 hydroxyl groups for every glucose molecule ranging between zero and three. For example, cellulose ether derivatives with degree of substitution values between 1.2 to 2.4 are soluble in cold water. Preferably the water-soluble polymer comprises a cellulose ether derivative wherein the cellulose ether derivative has a cellulose backbone and a functional ether group substitution and wherein the cellulose ether derivative has a degree of substitution ranging from 1.2 to 2.4. 25 More preferably the degree of substitution ranges from 1.3 to 2. Examples of cellulose ether derivatives suitable for the present invention includes methyl cellulose, ethyl cellulose, ethyl methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxy ethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxy ethyl cellulose 30 methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, methyl ethyl hydroxyethyl cellulose, methyl hydroxyethyl hydroxypropyl cellulose, ethyl hydroxyethyl hydroxypropyl cellulose, methyl carboxymethyl cellulose, ethyl carboxymethyl cellulose, propyl cellulose, and mixtures thereof. Still preferably the cellulose ether derivative is selected from the group consisting of methyl cellulose, ethyl cellulose, ethyl methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, 35 hydroxy ethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxy ethyl cellulose, P0000778 CPL 7 still more preferably the cellulose ether derivative is selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxy ethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxy ethyl cellulose and mixtures thereof. 5 Preferably the cellulose ether derivative is selected from cellulose alkyl ether derivative or cellulose hydroxyalkyl ether derivative. Non-ionic cellulose ether derivatives, i.e., derivatives containing non-ionic functional group, such as, hydroxy, methoxy, ethoxy, hydroxyethyl, hydroxy propyl, di-hydroxy propyl and dihydroxy butyl, are preferable for the present invention. Preferably the cellulose ether derivative is selected form hydroxypropyl methyl cellulose, 10 hydroxy ethyl cellulose, hydroxypropyl cellulose, and combinations thereof. Most preferred cellulose ether derivative is hydroxypropyl methyl cellulose. Typically, pure cellulose is hardly soluble in distilled water, however it forms gel by absorbing water. Hence, it may not be used as carrier or matrix for the sheet format. Non limiting 15 examples of the water-soluble polymers which may also present in the detergent sheet includes gelatine, and polysaccharide e.g., xanthan gum, guar gum, carrageenan gum in addition to the cellulose containing compound. Preferably the amount of water-soluble polymer in the flexible solid laundry article detergent 20 sheet is in the range 5 to 50% by weight, more preferably 7 to 45% by weight, even more preferably 9 to 40% by weight and most preferably 10 to 35% by weight of the flexible solid laundry article. Conventionally, a water dissolvable cleaning product or articles comprises polyvinyl alcohol 25 (PVA) or its copolymers, which are readily available and water-soluble substrate. However, the present invention may not contain PVA as water-soluble polymer. Preferably the flexible solid laundry article described herein is free of polyvinyl alcohol or its derivative. The flexible solid laundry article according to the present invention is free of polyvinyl alcohol or a copolymer of polyvinyl alcohol. The term ‘free of’ herein implies that the flexible solid laundry article 30 comprises less than 10% by weight, less than 5% by weight, more preferably 4% by weight, even more preferably 3% by weight yet more preferably 2% by weight and most preferably 1% by weight of polyvinyl alcohol and/or its derivative. P0000778 CPL 8 Water-insoluble disintegrant The flexible solid laundry article comprises a water-insoluble disintegrant. The water-insoluble disintegrant according to the present invention has a water absorption ratio greater than 1 when measured according to the method ASTM D570. The term water-insoluble herein refers to 5 ingredient having solubility less than 0.5% by weight in distilled water at 25 °. Such ingredients often are not readily soluble in water at room temperature., i.e., around 25 °C, and leave residue when added to water. Preferably the water-insoluble disintegrant is a swellable disintegrant. Swellable disintegrant 10 herein refers to the components which swell in contact with water and thereby accelerate dissolution of the detergent sheet. Particularly, in the present invention swellable disintegrant is referring to one which has a water absorption ratio (WAR) of greater than 1. It is observed that the swellable disintegrant in specific amount accelerates the dissolution of the detergent sheet in water and provides a cleaning composition quickly. Preferably the water-insoluble 15 disintegrant has a water absorption ration of greater than 1.5, still preferably greater than 2, still preferably greater than 5. More preferably the water-insoluble disintegrant has a water absorption ratio ranging from 1 to 10, still preferably 1 to 10, further preferably 1 to 5, still preferably 1 to 3. Water Absorption Ratio (WAR) is a measure as to how much water a material absorbs under 20 controlled and defined conditions. The process described in ASTM D570 is used in this application. The water-insoluble disintegrant is preferably selected from microcrystalline cellulose, alkali metal salt of starch glycolate, croscarmellose, pregelatinized starch and combinations thereof. Most preferred swellable disintegrant is microcrystalline cellulose. Microcrystalline cellulose 25 absorbs water and swells and has WAR value of 5 or more than 5. The flexible solid laundry article comprises from 3 to 25% by weight of the disintegrant. More preferably the flexible solid laundry article comprises from 4 to 24% by weight and most preferably from 5 to 23% by weight of the swellable disintegrant. The flexible solid laundry article may further comprise a non-swellable disintegrant. Non- 30 swellable disintegrant herein refer to those which have water absorption ratio (WAR) less than 1. Examples of non-swellable disintegrate having a WAR less than 1 includes polyvinyl pyrrolidone, calcium silicate, talc, starch, magnesium stearate. The non-swellable disintegrant P0000778 CPL 9 may present from 0 to 10% by weight of the more preferably from 0.5 to 8% by weight and most preferably from 1 to 5% by weight of the flexible solid laundry article. Cleaning ingredient 5 aspect of the present invention, the flexible solid laundry article includes a cleaning ingredient. The cleaning ingredient is preferably selected from the group consisting of: (i) amphoteric surfactant; (ii) amphoteric surfactant and a N-acylated lactam compound; (iii) amphoteric surfactant and a nonionic alkoxylated surfactant; (iv) amphoteric surfactant and a silicone surfactant; (v) amphoteric and a non-ionic homopolymer; (vi) alkyl alkoxylated 10 secondary nonionic surfactant with an average of from 1 to 35 units of alkylene oxide per mole of alcohol (vii) polyoxyethylene-polyoxypropylene block copolymer and solid release polymer (ix) enzyme and combinations thereof. Preferably the flexible laundry article comprises 0.5 to 30% by weight of the cleaning ingredient. 15 More preferably the flexible laundry article comprises 1 to 25% by weight, even more preferably 2 to 20 % by weight and most preferably 3 to 15% by weight of the cleaning agent. Amphoteric surfactant Preferably the cleaning ingredient is an amphoteric surfactant. Examples of amphoteric 20 surfactants suitable for use in the present invention include, but are not limited to, amphocarboxylates such as alkylamphoacetates (mono or di); alkyl betaines; alkylamidoalkyl betaines; alkylamidoalkyl sultaines; alkylamphophosphates; phosphorylated imidazolines such as phosphobetaines and pyrophosphobetaines; carboxyalkyl alkyl polyamines; alkylimino- dipropionates; alkylamphoglycinates (mono or di); alkylamphoproprionates (mono or di); N-alkyl 25 β-amino propionic acids; alkylpolyamino carboxylates; and mixtures thereof. Preferably the amphoteric surfactant may be alkyl betaine. Examples include Coco-Betaine, Lauryl Betaine and Oleyl Betaine. Preferably the amphoteric surfactant may be an alkylamidoalkyl betaine. Examples includes Cocamidoethyl Betaine, Cocamidopropyl Betaine, 30 Lauramidopropyl Betaine, Myristamidopropyl Betaine (RCO=myristoyl, and x=3), Soyamidopropyl Betaine, and Oleamidopropyl Betaine. Preferably the amphoteric surfactant is Cocamidopropyl Betaine (CAPB). The cocamidopropyl Betaine is commercially available from Rhone-Poulenc as Mirataine BDJ, Galaxy, Huntsman. Preferably the amphoteric surfactant may be alkyl phosphobetaine. Examples includes sodium Coco PG-Dimonium Chloride Phosphate. 35 Preferably the amphoteric surfactant may be alkyl sulphobetaine or alkyl Hydroxysultaines P0000778 CPL 10 Examples include Coco-hydroxysultaine and Lauryl hydroxysultaine. Preferably the amphoteric surfactant may be alkyl sultaines. Examples include Coco-sultaine and Lauryl sultaine. Preferably the amphoteric surfactant may be alkylamidoalkyl sultaines Examples include Cocamidopropyl sultaine, Lauramidopropyl sultaine, Myristamidopropyl sultaine, 5 soyamidopropyl sultaine, and Oleamidopropyl sultaine. Preferably the amphoteric surfactant may be alkylamidoalkyl Hydroxysultaines. Examples include Cocoamidopropyl hydroxysultaine, Lauramidopropyl hydroxysultaine, Myristamidopropyl hydroxysultaine, and Oleamidopropyl hydroxysultaine. 10 Preferably the amphoteric surfactant may be alkyl amine oxide. Examples include cocamine oxide and lauramine oxide. The most preferred amine oxide is coco dimethylamine oxide. Preferably the amphoteric surfactant may be alkylamidoalkyl amine oxide. Examples include cocamidopropylamine oxide (RCO =coco acyl x =3) and lauramidopropylamine oxide (RCO= lauroyl, x =3), and combinations of two or more thereof. 15 Preferably the amphoteric surfactant is selected from the group consisting of betaines, sultaines, amine oxide, alkyl iminoacetates, imino dialkanoates, amino alkanoates alkyl ammonium propionates, or mixtures thereof. More preferably the amphoteric surfactant are betaines or amine oxide. Preferably the betaine amphoteric surfactant is selected from alkyl 20 betaines, alkylamidoalkyl betaines, alkyl phosphobetaines, alkyl sulphobetaines and mixtures thereof. Preferably the amine oxide amphoteric surfactant is selected from alkyl amine oxide, alkylamidoalkyl amine oxide and mixtures thereof. More preferably the betaine type amphoteric surfactant is selected from alkyl betaines, alkylamidoalkyl betaines and alkyl sulphobetaines. Preferably the amine oxide type amphoteric surfactant is selected from alkyl amine oxide, 25 alkylamidoalkyl amine oxide or mixtures thereof. Most preferably the amphoteric surfactant is a cocamidopropyl betaine (CAPB). Preferably amphoteric surfactant is present in the flexible solid laundry article is in an amount ranging from 0.2 wt.% to 5 wt.% by weight of the article. 30 Preferably the cleaning ingredient is a mixture of amphoteric surfactant and a N-acylated lactam compound. P0000778 CPL 11 N-alkylated lactam compound Preferably the N- compound is a pyrrolidone compound. More preferably the N- alkylated lactam compound is in a monomeric form or a polymeric form. Still more preferably the N-alkylated lactam compound is selected from the group consisting of: 5 (i) N-alkylated pyrrolidone; N-alkylated piperidone, N-alkylated caprolactam, N-alkylated valerolactam, and mixtures thereof; or, (ii) homopolymer of N-alkylated pyrrolidone; (iii) copolymer of N-alkylated pyrrolidone with N-alkyl imidazole, N-alkyl carprolactam, N- 10 alkyl oxazolidones, polyvinyloxazolidone, or polyvinylimidazole, co-polymer of polyamine N-oxide polymers and N-vinylpyrrolidone; copolymers of N-vinylpyrrolidone and N- vinylimidazole; and combinations thereof; or, (iv) cross-linked polymer of polyamine N-oxide polymers; cross-linked polymer of N- vinylpyrrolidone and N-vinylimidazole; co polymer of polyamine N-oxide polymers and 15 N-vinylpyrrolidone copolymers of N-vinylpyrrolidone and N-vinylimidazole; cross-linked polyvinylpyrrolidone polymers; cross-linked polyvinyloxazolidone polymers; cross-linked polyvinylimidazoles polymer; and mixtures thereof. Preferably N-alkylated lactam compound is present in the solid detergent composition in an 20 amount ranging from 0.2 wt.% to 5 wt.%. of the composition. Preferably the N-alkylated lactam compound is PVP. Preferably the cleaning ingredient is a mixture of PVP and CAPB. Nonionic alkoxylated surfactant Preferably the non-ionic alkoxylated surfactant is selected from the group consisting of 25 polyoxyethylene-polyoxypropylene block copolymer, or a mixture of polyoxyethylene- polyoxypropylene block copolymer and monomeric surfactant with an average degree of alkoxylation of from 10 to 50. Preferably the nonionic alkoxylated surfactant is a polyoxyethylene-polyoxypropylene block 30 copolymer selected from the group consisting of: (i) a polyoxyethylene-polyoxypropylene block copolymer represented by the general formula (I) R-(EO)_n-(PO)_m-(EO)_n-R’ ………….. Formula (I) P0000778 CPL 12 wherein m is an integer from 10 to 130, each n is independently an integer from 2 to 60; and where R and R’ are each independently selected from the group consisting of H, OH, C₁ to C₁₈ alkyl or C₁ to C₁₈ hydroxyalkyl or, 5 (ii) a polyoxyethylene-polyoxypropylene block copolymer represented by the general formula (II) R-(PO)_n-(EO)_m-(PO)_n -R’ ………… Formula (II) wherein m is an integer of 15 to 150 and n at each end are independently integers of about 2 to 10 60 and where R and R’ are each independently selected from the group consisting of H, OH, C₁ to C₁₈ alkyl or C₁ to C₁₈ hydroxyalkyl; or, (iii) a polyoxyethylene-polyoxypropylene block copolymer represented by the general formula (III) 15 ….. Formula (III) where EO is ethylene oxide unit and PO is propylene oxide unit and a, b, and c, d and e each represent the number of ethylene oxide or propylene oxide units in each of the blocks, and where R and R' are independently H, C₁ to C₁₈ alkyl, C₁ to C₁₈ hydroxyalkyl or mixtures thereof. 20 Preferably the monomeric nonionic alkoxylated surfactant with an average degree of alkoxylation of from 10 to 50 represented by the general formula (IV) …….. Formula (IV) 25 where, R¹ is linear or at least singly branched C₄ to C₂₂ alkyl or -alkylphenol, R² is C₃ to C₄ alkyl, preferably propyl, in particular n-propyl, R⁵ is C₁ to C₄ alkyl, R⁶ is methyl or ethyl, n has a mean value of from 10 to 50. m has a mean value of from 0 to 20, preferably m being at least 0.5 if R is methyl or ethyl or r has the value 0, r has a mean value of from 0 to 50, preferably 0 and, s 30 has a mean value of from 0 to 50, preferably 0. Also, preferably the monomeric nonionic alkoxylated surfactant with an average degree of alkoxylation of from 10 to 50 represented by the general formula (V) P0000778 CPL 13 Formula (V) where, R³ is branched or straight chain C₄ to C₂₂ alkyl or -alkylphenol, R⁴ is C₃ to C₄ alkyl, p has a mean value of from 10 to 50, and q has a mean value of from 0.5 to 20, preferably from 5 0.5 to 4, more preferably from 0.5 to 2. Preferably nonionic alkoxylated surfactant is present in the flexible solid laundry article in an amount ranging from 0.2 wt.% to 5 wt.%. of the composition. Preferably the nonionic alkoxylated surfactant are those with Formula (I). Useful R- (EO)n-(PO)m-(EO)n -R’ block 10 copolymer described herein are commercially available under the tradename PLURONIC® and includes the series PE 3100, PE 3500, PE 4300, PE 6100, PE 61200, PE 6200, PE 6400, PE 6800, PE 8100, PE 9200, PE 9400, PE 10100, PE 10400, PE 10500 more preferably PE6400, PE6800, PE9200, PE430015 and PE8100 (BASF SE). Preferably the cleaning ingredient is a mixture of R- (EO)n-(PO)m-(EO)n -R’ block copolymer and CAPB. 15 Preferably the cleaning ingredient is a mixture of the polyoxyethylene-polyoxypropylene block copolymer and solid release polymer. Preferably the cleaning ingredient is a mixture of amphoteric surfactant and a silicone 20 surfactant. Silicone surfactant Preferably the silicone surfactant is selected from the group consisting of: 25 (i) a polydialkyl siloxane surfactant having the general formula (VI), (VII) and mixtures thereof, ……….. ………(VII) where PE represent a non-ionic group and is represented by the formula (a) 30 -CH₂-(CH₂)_p-O-(EO)_m(PO)_n-Z, …… (a) P0000778 CPL 14 wherein EO representing ethylene oxide, PO representing propylene oxide, “x” is a number that ranges from about 0 to about 100, “y” is a number that ranges from about 1 to 100, “m”, “n” and “p” are numbers that range from 0 to 50, m+n ≥ 1 and Z represents hydrogen or R wherein each R independently represents a lower (C₁ to C₆) straight or branched alkyl or PE is represented by 5 formula (b) ………….. (b) or, PE is represented by formula (c) ………. (c) or, 10 (ii) a silicone surfactant having the general formula (VIII) ……………….. (VIII) where, 15 and wherein “x” represent a number that ranges from 0 to 100, preferably x is 0 or 1 and “y” represent a number that ranges from 1 to 100, preferably y is at least 1. “a” and “b” represent numbers that independently range from 0 to 60, a+b≥1, and each R is independently H or a lower straight or branched (C₁ to C₆) alkyl; or, (iii) an end-blocked (AEB general formula (IX): 20 ……. (IX) P0000778 CPL 15 wherein x represents 0 to 100, y represents 1 to 100, x + y represents 1 to 200; or, (iv) a trisiloxane surfactant represented by the general formula (X) or (XI) 5 wherein R₁ and R₂ are each or C_nH_2nO[C₂H₄O]_y [C₃H₆O]_z Q provided R₁ and R₂ are not the same, “a” is 0 to 2, “n” has a value from 2 to 4; “y” has a value of 3 to 10; “z” has a value from 0 to 5; Q is selected from the group consisting of hydrogen and a branched or straight chain alkyl having 1 to 4 carbon atoms where preferably “a” is 0 to 1, “n” is 2 to 4, “y” is 5 to 9, “z” is 0 to 3 and “Q” is a 1 to 3 straight alkyl; 10 wherein n= 2 to 4, y= 3 to 10, z= 0 to 5, and where R is either an alkyl having 1 to 4 carbon atoms or R is an OH or H group, provided that when z = 0, R = H and when z = 1 to 5 R = OH 15 or an alkyl having 1 to 4 carbon atoms and combinations thereof. Preferably silicone surfactant is present in the flexible solid laundry article in an amount ranging from 0.1 wt.% to 10 wt.%, more preferably from 0.2 wt.% to 5 wt.%, still more preferably from 0.2 wt.% to 2 wt.% by weight of the article. Preferably the silicone surfactant herein described 20 are commercially available under the tradename SILWET^® and includes Silwet L-77 (from Supreme Silicone) or polyether or polybetaine polysiloxane copolymer under the tradename ABIL^®. Preferred silicone surfactants are sold under the SILWET trademark or under the ABIL^® B trademark. Preferably the cleaning ingredient is a mixture of Silwet L-77 and CAPB. 25 Preferably the cleaning ingredient is a mixture of amphoteric surfactant and a nonionic homopolymer. P0000778 CPL 16 Non-ionic homopolymer Preferably the nonionic homopolymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, polybutylene glycol and mixtures thereof. 5 Preferably the homopolymer is present in the solid detergent composition in an amount ranging from 0.2 wt.% to 2.5 wt.% by weight of the composition. Preferably the nonionic homopolymer has a weight average molecular weight ranging from 200 g/mol to 1,000,000 g/mol, 1000 g/mol to 20,000 g/mol, also preferably from 2000 g/mol to 10,000 g/mol. 10 More preferably the homopolymer is a polyethylene glycol, polypropylene glycol, or mixtures thereof. A highly preferred material is polyethylene glycol 6000. Commercially available polyethylene glycol useful for the present invention includes Polymeg 4000 from India Glycols. Preferably the cleaning ingredient is a mixture of polyethylene glycol and CAPB. 15 Preferably the cleaning ingredient is an alkyl alkoxylated secondary nonionic surfactant wherein the nonionic surfactant has an average of from 1 to 35 units of alkylene oxide per mole of alcohol. The nonionic surfactant is secondary alcohol-based surfactant. The nonionic surfactant is a branched secondary alcohol-based surfactant. 20 nonionic surfactant The nonionic surfactant is an alkoxylated alcohol surfactant derived from the reaction of a monohydroxy alcohol selected from secondary alcohol, or secondary alkylphenol with from 6 to 35 moles of alkylene oxide per mole of alcohol or alkyl phenol on an average basis. Preferably 25 the alkyl group or the alkyl phenol group containing from about 8 to about 20 carbon atoms. More preferably the nonionic surfactant is an alkyl alkoxylated secondary nonionic surfactant. The alkoxylated nonionic surfactant preferably has an average of from 8 to 18, more preferably from 9 to 15, still more preferably from 12 to 15 carbon atoms. 30 Preferably the alkyl alkoxylated nonionic surfactant has an average of from 1 to 35 units of alkylene oxide per mole of alcohol, still more preferably from 1 to 31. P0000778 CPL 17 Alkyl ethoxylated secondary nonionic surfactant are preferred. Preferably the alkyl ethoxylated secondary nonionic surfactant has an average of from 1 to 20, preferably from 1 to 18, more preferably from 1 to 15, units of ethylene oxide per mole of alcohol. 5 Alkyl propylated secondary nonionic surfactant are preferred. Preferably the alkyl propylated secondary nonionic surfactant has an average of from 1 to 11, preferably from 1 to 10, more preferably from 1 to 8, units of propylene oxide per mole of alcohol. Preferably the alkyl alkoxylated secondary nonionic surfactant has a mixture of ethylene oxide 10 and propylene oxide. Preferably the alkoxylated secondary nonionic surfactant has a general formula wherein AO is an alkyleneoxy containing at least 3 carbon atoms; EO is ethyleneoxy; m has a 15 value ranging from 1 to 11; n has a value ranging from 1 to 20; R and R¹ are independently -(CH₂)_n-CH₃ where n is at least 1 and R₂ is H or C₁ to C₁₃ alkyl. Preferably the group formed by R, R¹, R² and the carbon to which they are attached includes from 7 to 16 carbon atoms, more preferably from 12 to 15 carbon atoms. More preferably, R 20 and R¹ are independently C₁ to C₁₄ alkyl; and R₂ is H or C₁ to C₁₃ alkyl. More preferably the alkyl alkoxylated secondary nonionic surfactant is in accordance with the Formula (I_T). (I_T) 25 wherein n is at least 1 where n₁ is at least 1 where n + n₁ ranges from 12 to 15 x is a real number from 0 to 11 30 y is a real number from 1 to 20. P0000778 CPL 18 The alkyl alkoxylated secondary nonionic surfactant is preferably a condensation product of secondary alcohol and alkylene oxide having from 1 to 35 moles of alkylene oxide per mole of alcohol. More preferably the alkylene oxide is an ethylene oxide, propylene oxide and mixtures thereof. 5 Preferably the nonionic surfactant has a HLB value ranging from 8 to 18, more preferably from 12 to 15, still more preferably the HLB value is from 13 to 14. Preferably the nonionic surfactant is Tergitol 15-S-9 (from which is a condensation product of 10 C₁₁ to C₁₅ secondary alcohol having 9 moles of ethylene oxide. Preferably the flexible solid laundry article includes from 1 wt.% to 10 wt.% alkyl alkoxylated secondary nonionic surfactant, more preferably where the nonionic surfactant has a structure in accordance with formula (I). Preferably the amount of alkyl alkoxylated secondary nonionic 15 surfactant ranges from 1 wt.% to 5 wt.%, still preferably from 1 wt.% to 4 wt.%, more preferably 1 wt.% to 3 wt.%, still more preferably from 1 wt.% to 2.5 wt.%. Preferably the amount of alkyl alkoxylated secondary nonionic surfactant in the solid laundry detergent composition is not less than 1 wt.%, still preferably not less than 1.5 wt.%, more preferably not less than 2 wt.%, still more preferably not less than 2.5 wt.%, but typically not more than 8 wt.%, preferably not more 20 than 6 wt.% or still preferably not more than 5 wt.%. Preferably the cleaning ingredient is an enzyme. Preferred examples of the enzyme include those which provide cleaning performance and/or fabric care benefits. Examples of suitable 25 enzymes include, but are not limited to, hemicellulases, peroxidases, proteases, cellulases, xylanases, lipases, xyloglucanase, phospholipases, esterases, cutinases, pectinases, mannanases, pectate lyases, keratinases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, pentosanases, malanases, G-glucanases, arabinosidases, hyaluronidase, chondroitinase, laccase, and amylases, or mixtures thereof. A 30 typical combination is an enzyme cocktail that may comprise, for example, a protease and lipase in conjunction with one or more of amylase, mannanase and cellulase. Preferably the enzyme includes amylase, protease, cellulase or mixtures thereof. P0000778 CPL 19 In one aspect preferred enzymes would include a protease. Suitable proteases include metalloproteases and serine proteases, including neutral or alkaline serine proteases, such as subtilisins (EC 3.4.21.62). Suitable commercially available protease enzymes include those sold under the trade names Alcalase®, Savinase®, Primase®, Durazym®, Polarzyme®, Kannase®, 5 Liquanase®, Liquanase Ultra®, Savinase Ultra®, Ovozyme®, Neutrase®, Everlase® and Esperase® by Novozymes A/S (Denmark), those sold under the tradename Maxatase®, Maxaca®l, Maxapem®, Properase®, Purafect®, Purafect Prime®, Purafect Ox®, FN3®, FN4®, 10 Excellase® and Purafect OXP® by Genencor International, those sold under the tradename Opticlean® and Optimase by Solvay Enzymes. 10 Suitable commercially available alpha-amylases include DURAMYL®, LIQUEZYME®, TERMAMYL®, TERMAMYL ULTRA®, NATALASE®, SUPRAMYL®, STAINZYME®, STAINZYME PLUS®, FUNGAMYL® and BAN® (Novozymes A/S, Bagsvaerd, Denmark), KEMZYM® AT 9000 Biozym Biotech Trading GmbH Wehlistrasse 27b A-1200 Wien Austria, 15 RAPIDASE®, PURASTAR®, ENZYSIZE®, OPTISIZE HT PLUS®, POWERASE® and PURASTAR OXAM® (Genencor International Inc., Palo Alto, California) and KAM® (Kao, 14-10 Suitable amylases include NATALASE®, STAINZYME and STAINZYME PLUS® and mixtures thereof. 20 Preferred lipases would include those sold under the tradenames Lipex® and Lipolex®. Suitable endoglucanases are sold under the tradenames Celluclean® and Whitezyme® (Novozymes A/S, Bagsvaerd, Denmark). 25 Other preferred enzymes include pectate lyases sold under the tradenames Pectawash®, Pectaway®, Xpect® and mannanases sold under the tradenames Mannaway® (all from Novozymes A/S, Bagsvaerd, Denmark), and Purabrite® (Genencor International Inc., Palo Alto, California). 30 Preferably the enzyme may be formulated as a granule, preferably a co-granule which combines one or more additional enzymes. Methods for producing multi-enzyme co-granulate for the detergent industry are known to a person skilled in the art. Another example of cellulase enzymes in the form of co-granulates are disclosed in WO 2013/188331 A1. P0000778 CPL 20 Also preferred are the enzyme in the form of a granule having a core comprising enzyme and surrounded by one or more coating layers. The coating layers provide improved storage stability, reduce dust formation, or improve the color or appearance of the granule. The coating layers may include a salt, polyethylene glycol (PEG), methyl hydroxy propyl cellulose (MHPC), 5 and polyvinyl alcohol (PVA). The enzyme may also be formulated in an encapsulate form. The enzyme may be encapsulated in a matrix, preferably a water-soluble or water dispersible matrix (e.g., water-soluble polymer particles), for example as described in WO 2016/023685. An example of a water-soluble 10 polymeric matrix is a matrix composition comprising polyvinyl alcohol. The enzyme may also be encapsulated in core-shell microcapsules, for example as described in WO 2015/144784. Such core-shell capsules can be prepared using a number of technologies known in the art, e.g., by interfacial polymerization using either a water-in-oil or an oil-in-water 15 emulsion, where polymers are crosslinked at the surface of the droplets in the emulsion (the interface between water and oil), thus forming a wall/membrane around each droplet/capsule. Preferably the enzyme may also be present as a multienzyme co-granule which includes one or more additional preferred enzyme selected from the group consisting of lipases, peroxidases, 20 laccases, first-wash lipases, proteases, mannanase, oxidases, amylase, and mixtures thereof. Detersive surfactant Preferably the flexible solid laundry article comprises a detersive surfactant in addition to the cleaning ingredient. The detersive surfactant may be present in the flexible laundry article in an 25 amount ranging from 5 to 60% by weight, more preferably 7 to 55% by weight and even more preferably 9 to 50% by weight and most preferably 10 to 45% by weight. Anionic surfactant Preferably the detersive surfactant is an anionic surfactant. The anionic surfactant is preferably 30 a sulphonate surfactant. Preferably the sulphonate surfactant is an alkyl aryl sulphonate surfactant. More preferably the alkyl aryl sulphonate surfactant has a linear alkyl group comprising from C₁₀ to C₂₂ alkyl group, more preferably from C₁₀ to C₁₈ alkyl group, more preferably from C₁₀ to C₁₆ alkyl group still more preferably from C₁₀ to C₁₃ alkyl group. Sulphonate surfactant: Preferably the sulphonate surfactant is an alkyl benzene sulphonate 35 surfactant. Preferably the alkyl chain in the alkyl benzene sulphonate is straight or branched, P0000778 CPL 21 more preferably linear. Preferably the sulphonate surfactant is a linear alkyl benzene sulphonate with a C₁₀ to C₁₈ alkyl group, still preferably C₁₀ to C₁₄ alkyl group and most preferably C₁₀ to C₁₃ linear alkyl benzene sulphonate. Preferably the higher linear alkyl benzene sulfonate is a sodium alkylbenzene sulfonate surfactant (LAS), which preferably has a straight 5 chain alkyl radical of average length of about 11 to 13 carbon atoms. Suitable alkyl benzene sulphonate (LAS) is obtainable, preferably obtained, by sulphonating commercially available linear alkyl benzene (LAB); suitable LAB includes low 2-phenyl LAB, other suitable LAB includes high 2-phenyl LAB, such as those supplied by Sasol under the tradename Hyblene®. 10 Preferably C₁₀ to C₁₅ alkyl benzene sulfonates (LAS), still preferably C₁₀ to C₁₄ alkyl benzene sulfonates (LAS), still preferably the benzene sulfonate (LAS) has at least 50 wt.% of C₁₂ alkyl benzene sulfonate, still preferably 80 wt.% C₁₂ alkyl benzene sulfonates. The alkyl benzene sulphonate is preferably in the salt form with the cation selected from alkali metal, alkaline earth metal or alkanolamine. Preferably alkali metal selected from sodium or potassium, most 15 preferably sodium. The key intermediate compound in the manufacture of LAS is the relevant alkene. These alkenes (olefins) may be produced by any of the methods described above and may be formed from primary sugars, biomass, waste plastic, MSW, carbon capture, methane capture, marine carbon to name a few. Whereas in the processed described above the olefin is processed to form linear alcohols by hydroformylation and oxidation instead, the olefin is 20 reacted with benzene and then sulphonate to form the LAS. Other suitable sulphonate surfactants include methyl ester sulphonates, alpha olefin sulphonates, modified alkylbenzene sulfonate (MLAS) as discussed in WO 99/05243, WO 99/05242 and WO 99/05244 and mixtures thereof. 25 Preferably the detersive surfactant is an anionic sulphate surfactant. Suitable sulphate surfactants include alkyl sulphate, preferably C₈ to C₁₈ alkyl sulphate, or predominantly C₁₂ to C₁₈ alkyl sulphate. The alkyl sulphate, alkyl alkoxylated sulphate may be linear or branched, substituted or un-substituted. The alkyl sulphate, alkyl alkoxylated sulphate and alkyl benzene 30 sulphonate surfactant may be derived from petrochemical material, biomaterial, or a waste material. Specific sulphated anionic surfactants which can be used in the solid laundry composition of the present invention include sulphated ethoxylated and un-ethoxylated fatty alcohols, preferably 35 linear primary or secondary monohydric alcohols with C₁₀ to C₁₈, preferably C₁₂ to C₁₆, alkyl P0000778 CPL 22 groups and, if ethoxylated, on average from 1 to 15, preferably 3 to 12 moles of ethylene oxide (EO) per mole of alcohol, and sulphated ethoxylated alkylphenols with C₈ to C₁₆ alkyl groups, preferably C₈ to C₉ alkyl groups, and on average from 4 to 12 moles of EO per mole of alkyl phenol. A preferred sulphate detersive surfactant is alkyl alkoxylated sulphate, preferably alkyl 5 ethoxylated sulphate, preferably a C₈ to C₁₈ alkyl alkoxylated sulphate, preferably a C₈ to C₁₈ alkyl ethoxylated sulphate, preferably the alkyl alkoxylated sulphate has an average degree of alkoxylation of from 0.5 to 20, preferably from 0.5 to 10, preferably the alkyl alkoxylated sulphate is a C₈ to C₁₈ alkyl ethoxylated sulphate having an average degree of ethoxylation of from 0.5 to 10, preferably from 0.5 to 5, more preferably from 0.5 to 3 and most preferably from 10 0.5 to 1.5. Nonlimiting examples of sulphate anionic surfactants useful herein include: C₁₀ to C₂₀ primary, branched chain and random alkyl sulfates (AS); C₁₀ to C₁₈ secondary (2,3) alkyl sulfates; C₁₀ to C₁₈ alkyl alkoxy sulfates (AES) wherein x is from 1-30; mid-chain branched alkyl sulfates as 15 discussed in US 6,020,303 and US 6,060,443; mid-chain branched alkyl alkoxy sulfates as discussed in US 6,008,181 and US 6,020,303. Preferably the anionic surfactant is C₁₀ to C₂₀ primary sulphate surfactant, preferably lauryl sulphate. Preferably sodium lauryl sulphate. Preferably the C₁₀ to C₂₀ primary sulphate 20 surfactant is present in an amount ranging from 20 wt.% to 49 wt.% by weight of the flexible solid laundry article. Anionic surfactants suitable for use in the compositions include alkyl and alkyl ether sulfates. These materials have the respective formulae ROSO3M and RO(C₂H₄O)_xSO₃M, wherein R is 25 alkyl or alkenyl of from about 8 to about 18 carbon atoms, x is an integer having a value of from 1 to 10, and M is a cation such as ammonium, alkanolamines, such as triethanolamine, monovalent metals, such as sodium and potassium, and polyvalent metal cations, such as magnesium, and calcium. Preferably, R has from 8 to 18 carbon atoms, more preferably from 10 to 16 carbon atoms, even more preferably from 11 to 14 carbon atoms, in both the alkyl and 30 alkyl ether sulfates. The alkyl ether sulfates are typically made as condensation products of ethylene oxide and monohydric alcohols having from about 8 to about 24 carbon atoms. The alcohols can be synthetic, or they can be derived from fats, e.g., coconut oil, palm kernel oil, tallow. Synthetic alcohols may include the grades available via Shell Chemical Co under the NEODOL trade name as NEODOL 91 (C9-11 alcohols), NEODOL 23 (C12-13 alcohols),35 NEODOL 25 (C12-15 alcohols), NEODOL 45 (C14-15 alcohols), and NEODOL 135 (C11-C13- P0000778 CPL 23 C15 alcohols). Lauryl alcohol and straight chain alcohols derived from coconut oil or palm kernel oil are preferred. Such alcohols are reacted with between 0 and 10, preferably from 2 to 5, or preferably 3, molar proportions of ethylene oxide, and the resulting mixture of molecular species having, for example, an average of 3 moles of ethylene oxide per mole of alcohol, is 5 sulfated and neutralized. Amino acid surfactants Anionic surfactants suitable for use in the compositions include sulfate-free surfactants. Such sulfate-free surfactants can comprise a material derived from an amino acid such as mono and 10 dicarboxylate salts such as glutamate, glycinate, taurate, alaninate or sarcosinate. Examples include sodium lauroyl glutamate, sodium cocoyl glutamate, potassium lauroyl glutamate, sodium cocoyl alaninate, sodium cocoyl glycinate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium cocoyl methyl taurate, sodium lauryl methyl isethionate, sodium cocoyl isethionate, or sodium oleoyl sarcosinate. 15 Preferably the detersive surfactant comprises a sulphated ethoxylated C₁₀ Guerbet alcohol surfactant with a number average degree of ethoxylation in the range of 2.5 to 6. Preferably the detersive surfactant is a further nonionic surfactant, other than those specifically 20 disclosed above as a cleaning ingredient. A preferred non-ionic surfactant includes the methyl ester ethoxylates. Methyl ester ethoxylate surfactant is of the form: R3(-C=O)-O-(CH₂CH₂-O)_n-CH₃ Where R3COO is a fatty acid moiety, such as oleic, stearic, palmitic. Fatty acid nomenclature is 25 to describe the fatty acid by 2 numbers A: B where A is the number of carbons in the fatty acid and B is the number of double bonds it contains. For example, oleic is 18:1, stearic is 18:0 and palmitic 16:0. The position of the double bond on the chain may be given in brackets, 18:1(9) for oleic, 18:2 (9,12) for linoleic where 9 if the number of carbons from the COOH end. The integer n is the mole average number of ethoxylates. 30 Rhamnolipids Preferably the solid laundry composition includes a rhamnolipid biosurfactant. Preferably the rhamnolipid is a mono-rhamnolipids, di-rhamnolipids or mixtures thereof. Preferably the mono- rhamnolipids has a single rhamnose sugar ring. Preferably the di-rhamnolipids have two 35 rhamnose sugar rings. P0000778 CPL 24 In the case of rhamnolipids, throughout this patent specification, the prefixes mono- and di-are used to indicate respectively to indicate mono-rhamnolipids (having a single rhamnose sugar ring) and di-rhamnolipids (having two rhamnose sugar rings) respectively. If abbreviations are used Rha is mono-rhamnolipid and Rha2 is di-rhamnolipid. 5 The mono-rhamnolipid may be L-rhamnosyl-β-hydroxydecanoyl-β-hydroxydecanoate (Rha-C_10- C₁₀ with a formula of C₂₆H₄₈O₉) produced by P. aeruginosa. A typical di-rhamnolipid is L-rhamnosyl-L-rhamnosyl- β -hydroxydecanoyl- β -hydroxydecanoate 10 (Rha2C₁₀C₁₀ with a formula of C₃₂H₅₈O₁₃). In practice a variety of other minor components with different alkyl chain length combinations, depending upon carbon source and bacterial strain, exist in combination with the above more common rhamnolipids. The ratio of mono-rhamnolipid and di-rhamnolipid may be controlled by 15 the production method. The following rhamnolipids are sources of mono- and di- rhamnolipids encompassed within the invention (C12:1, C14:1 indicates fatty acyl chains with double bonds): Rha-C₈-C₁₀, Rha-C₁₀-C_8, 20 C₁₀-C_12:1, Rha2-C₁₀-C_12, Rha2-C₁₂-C₁₀, Rha2-C_12:1-C₁₂, Rha2-C₁₀-C_14:1, Rha2-C₁₄-C₁₄ and mixtures thereof. Preferably, the rhamnolipid comprises at least 50 wt.% di-rhamnolipid, more preferably at least 25 60 wt.% di-rhamnolipid, even more preferably 70 wt.% di-rhamnolipid, most preferably at least 80 wt.% di-rhamnolipid. Preferably the rhamnolipid is a di-rhamnolipid of formula: Rha2-C_8-12-C_{8- 12}. The preferred alkyl chain length is from C₈ to C₁₂, the alkyl chain may be saturated or unsaturated. Preferably the solid laundry composition includes from 1 wt.% to 20 wt.% alkyl aryl sulphonate surfactant. 30 Carboxylate surfactant Other suitable anionic detersive surfactants include alkyl ether carboxylate surfactant. Preferably the alkyl ether carboxylate surfactant has a structure: R-(OCH₂CH₂)_n-OCH₂-COOH, where R is selected from saturated C₈ to C₁₈ linear alkyl chains, preferably C₁₂, to C₁₈ linear 35 alkyl chains, more preferably a C₁₂ or C₁₈ linear alkyl chain, most preferably a C₁₂ linear alkyl P0000778 CPL 25 chain; n is the average ethoxylation and n is selected from 1 to 20, 5 to 20, preferably 7 to 14, more preferably 8 to 12, most preferably 9 to 11, also preferred are C₁₀ to C₁₈ alkyl alkoxy carboxylates comprising 1-5 ethoxy units. Weights of alkyl ether carboxylic acid are calculated as the protonated form, R-(OCH₂CH₂)_n-OCH₂COOH. They may be used as salt version for 5 example sodium salt, or amine salt. The alkyl chain is aliphatic and linear and may be selected f^{rom: CH}_{3(CH2)7-; CH3(CH2)8-; CH3(CH2)9-; CH3(CH2)10-; CH3(CH2)11-; CH3(CH2)12-; CH3(CH2)13-;} CH₃(CH₂)₁₄-; CH₃(CH₂)₁₅-; CH₃(CH₂)₁₆-; and, CH₃(CH₂)₁₇-.The alkyl chain is preferably selected from CH₃(CH₂)₁₅- and CH₃(CH₂)₁₇-. Alkyl ether carboxylic acid are available from Kao (Akypo^®), Huntsman (Empicol^®) and Clariant (Emulsogen^®). 10 Methyl Ester Ethoxylates (MEE) are described in chapter 8 of Biobased Surfactants (Second Edition) Synthesis, Properties, and Applications Pages 287-301 (AOCS press 2019) by G.A. Smith; J. Am. Oil. Chem.Soc. vol 74 (1997) page 847-859 by Cox M.E. and Weerasooriva U; Tenside Surf. Det. vol 28 (2001) page by 72-80 by Hreczuch et al; by C. Kolano. Household 15 and Personal Care Today (2012) page 52-55; J.Am.Oil. Chem.Soc. vol 72 (1995) page 781-784 by A. Hama et al. MEE may be produced the reaction of methyl ester with ethylene oxide, using catalysts based on calcium or magnesium. The catalyst may be removed or left in the MEE. An alternative route to preparation is transesterification reaction of a methyl ester or 20 esterification reaction of a carboxylic acid with a polyethylene glycol that is methyl terminated at one end of the chain. The methyl ester may be produced by transesterification reaction of methanol with a triglyceride, or esterification reaction of methanol with a fatty acid. Transesterification reactions 25 of a triglyceride to fatty acid methyl esters and glycerol are discussed in Fattah et al (Front. Energy Res., June 2020, volume 8 article 101) and references therein. Common catalysts for these reactions include sodium hydroxide, potassium hydroxide, and sodium methoxide. Esterase and lipases enzyme may also be used. Triglycerides occur naturally in plant fats or oils, preferred sources are rapeseed oil, castor oil, maize oil, cottonseed oil, olive oil, palm oil, 30 safflower oil, sesame oil, soybean oil, high steric/high oleic sunflower oil, high oleic sunflower oil, non-edible vegetable oils, tall oil, and any mixture thereof and any derivative thereof. The oil from trees is called tall oil. Used food cooking oils may be utilised. Triglycerides may also be obtained from algae, fungi, yeast, or bacteria. Plant sources are preferred. P0000778 CPL 26 Distillation and fractionation process may be used in the production of the methyl ester or carboxylic acid to produce the desired carbon chain distribution. Preferred sources of triglyceride are those which contain less than 35%wt polyunsaturated fatty acids in the oil before distillation, fractionation, or hydrogenation. 5 Fatty acid and methyl ester may be obtained from Oleochemical suppliers such as Wilmar, KLK Oleo, Unilever oleochemical Indonesia. Biodiesel is methyl ester, and these sources may be used. 10 When ESB is MEE preferably has a mole average of from 8 to 30 ethoxylate groups (EO), more preferably from 10 to 20. The most preferred ethoxylate comprises 12 to 18EO. Preferably, at least 10% wt., more preferably at least 30% wt. of the total C18:1 MEE in the composition has from 9 to 11EO, even more preferably at least 10wt% is exactly 10EO. For example, when the MEE has a mole average of 10EO then at least 10 wt.% of the MEE should 15 consist of ethoxylate with 9, 10 and 11 ethoxylate groups. The methyl ester ethoxylate preferably has a mole average of from 8 to 13 ethoxylate groups (EO). The most preferred ethoxylate has a mol average of from 9 to 11EO, even more preferably 10EO. When the MEE has a mole average of 10EO then at least 10 wt.% of the MEE 20 should consist of ethoxylate with 9, 10 and 11 ethoxylate groups. In the context of the wider MEE contribution, it is preferred that at least 40wt% of the total MEE in the composition is C18:1. 25 In addition, it is preferred that the MEE component also comprises some C16 MEE. Accordingly, it is preferred that the total MEE component comprises from 5 to 50% wt. total MEE, C16 MEE. Preferably the C16 MEE is greater than 90wt%, more preferably greater than 95wt% C16:0. 30 Further, it is preferred that the total MEE component comprises less than 15% wt, more preferably less than 10wt%, most preferably less than 5wt% total MEE of polyunsaturated C18, i.e. C18:2 and C18:3. Preferably C18:3 is present at less than 1 wt%, more preferably less than 0.5wt%, most preferably essentially absent. The levels of polyunsaturation may be controlled by distillation, fractionation or partial hydrogenation of the raw materials (triglyceride or methyl 35 ester) or of the MEE. P0000778 CPL 27 Further, it is preferred that the C18:0 component is less than 10wt% by weight of the total MEE present. Further, it is preferred that the components with carbon chains of 15 or shorter comprise less 5 than 4wt% by weight of the total MEE present. A particularly preferred MEE has 2 to 26 wt.% of the MEE C16:0 chains, 1 to 10 wt.% C18:0 chains, 50 to 85 wt.% C18:1 chains and 1 to 12 wt.% C18:2 chains. 10 Preferred sources for the alkyl groups for the MEE include methyl ester derived from distilled palm oil and distilled high oleic methyl ester derived from palm kernel oil, partially hydrogenated methyl ester of low euric rapeseed oil, methyl ester of high oleic sunflower oil, methyl ester of high oleic safflower oil and methyl ester of high oleic soybean oil. High Oleic oils are available from DuPont (Plenish high oleice soybean oil), Monsanto (Visitive 15 Gold Soybean oil), Dow (Omega-9 Canola oil, Omega-9 sunflower oil), the National Sunflower Association and Oilseeds International. Preferably the double bonds in the MEE are greater than 80wt% in the cis configuration. 20 Preferably the 18:1 component is oleic. Preferably the 18:2 component is linoleic. The methyl group of the methyl ester may be replace by an ethyl or propyl group. Methyl is most preferred. Preferably the flexible solid laundry article comprises from 1 to 5 wt.% MEE. 25 Other preferred nonionic surfactant includes C₁₁ to₁₃ iso alcohol with 5 to 9 EO groups. Branched nonionic surfactant which includes ethoxylated 2-propyl-heptanol with 5 to 9 EO groups. Surfactant combinations 30 Preferably the detersive surfactant includes a combination of one or more surfactant. Preferably the detersive surfactant includes a mixture of (i) a lauryl sulfate alkali metal salt (preferably sodium or potassium salt, most preferably sodium salt) and (ii) a heptaoxyethylated lauryl alcohol (LA7), a nonaoxyethylated lauryl alcohol (LA9) or a mixture thereof. Preferably, lauryl sulfate alkali metal salt (preferably sodium or potassium salt, most preferably sodium salt) is P0000778 CPL 28 present as the main detersive surfactant and (b) a heptaoxyethylated lauryl alcohol (LA7), a nonaoxyethylated lauryl alcohol (LA9) as a co-surfactant. Plasticizer 5 The flexible solid laundry article according to the present invention may preferably include a plasticizing agent. Preferably the plasticizing agent is water soluble. The water-soluble plasticizer can be included in the article at a level of from 0.1 wt.% to about 25 wt.% by weight of the article. Non -limiting examples of suitable plasticizing agents include polyols, copolyols, and polyesters. Examples of useful polyols include, but are not limited to, glycerin, di-glycerin, 10 20 propylene glycol, ethylene glycol, butylene glycol, pentylene glycol, polyethylene glycol (200- 600), polyhydric low molecular weight alcohols (e.g., C₂ to C₈ alcohols); mono di- and oligosaccharides such as fructose, glucose, sucrose, maltose, lactose, and high fructose corn syrup solids. More preferably the plasticizing agent is selected from the group consisting of glycerin, propylene glycol, ethylene glycol, polyethylene glycol and combinations thereof. More 15 preferably, the plasticizing agent is glycerin. Preferably the plasticizer is not PVOH or copolymer of PVOH. Bittering agent The flexible solid laundry article may comprise an aversive agent, for example a bittering agent. 20 Suitable bittering agent include but not limited to naringin, sucrose octa acetate, quinine hydrochloride, denatonium benzoate, or mixtures thereof. Any suitable level of aversive agent may be used in the flexible solid laundry article. Suitable levels include, but are limited to, 1 to 5000 ppm, or even 100 to 2500 ppm, or even 250 to 2000 ppm. Graphene or derivative thereof 25 The flexible solid laundry article may comprise 0.01 to 1.0% by weight graphene or derivative thereof. Most common graphene derivatives are graphene oxide (GO) and reduced graphene oxide (rGO). Graphene is an allotrope, formed by a single layer carbon atoms arranged in hexagonal lattice structure. It is reported that graphene or derivative thereof has good thermal and electrical 30 conductivity, commonly used in various sector of electrical and electronics, e.g., semiconductor, communication, sensors, etc. P0000778 CPL 29 Graphene is hydrophobic and can be obtained in two manners. The first is by peeling layers from graphite until you achieve a graphene monolayer. The second is known as Chemical Vapor Deposition (CVD) and where large-scale uniformity can be obtained and controlled. Preferably the graphene derivative suitable for the invention is graphene oxide. Graphene oxide 5 (GO) is hydrophilic and can be manufactured through Hummer’s method. One of the ways to prepare reduced graphene oxide (rGO) is by thermal and/or chemical reduction of graphene oxide. More details on graphene and derivative thereof may be found in literatures, e.g., “Review on graphene and its derivatives: Synthesis methods and potential industrial implementation” Lee et.al., Journal of the Taiwan Institute of Chemical Engineers, Volume 98, 10 May 2019, Pages 163-180, Elsevier. Graphene oxide (GO) is also commercially available and may be procured from suppliers such as Platonic Nanotech. Preferably the flexible solid laundry article comprises 0.01 to 0.8% by weight, more preferably comprises 0.02 to 0.8% by weight, furthermore preferably 0.05 to 0.7% by weight, yet more preferably 0.08 to 0.6% by weight and most preferably 0.09 to 0.5% by weight of the graphene 15 or derivative thereof. Slip additive The flexible solid laundry article may further comprise 1.0 to 10% by weight of a slip additive. Without bound by the theory, it is believed that slip additive reduces the coefficient of friction on the surfaces the flexible solid laundry article, thus helps providing non-sticky films. 20 Preferably The flexible solid laundry article comprises 1.0 to 8% by weight, more preferably 1.0 to 7% by weight, even more preferably 1.0 to 6% by weight, furthermore preferably 1.0 to 5% by weight, yet more preferably 1.0 to 4% by weight and most preferably 1.0 to 3% by weight of the slip additive. Preferably, the slip additive comprises a fatty acid amide. Preferably the slip additive comprises 25 fatty acid amide with 10 to 30 carbon atoms, more preferably 11 to 28 carbon atoms, even more preferably 12 to 26 and yet more preferably 12 to 24 and most preferably 12 to 22 carbon atoms. Preferably, the fatty acid amide is saturated or unsaturated. Where it is unsaturated it is preferred that it is mono- or di-, more preferably mono-unsaturated. Most preferred slip additives include stearamide, erucamide and oleamide and mixture thereof. 30 Most preferred slip additives are C18 to C22 mono-unsaturated fatty acid amides and which includes erucamide and oleamide. P0000778 CPL 30 Sequestrant laundry article may comprise a sequestrant. Preferably the sequestrant is selected from organic detergent builders or sequestrant materials. Examples of such sequestrants include the alkali metal, citrates, succinates, malonates, carboxymethyl 5 succinates, carboxylates, polycarboxylates and poly acetyl carboxylates. Specific examples include sodium, potassium and lithium salts of oxydisuccinic acid, mellitic acid, benzene polycarboxylic acids, and citric acid. Other examples are DEQUEST™, organic phosphonate type sequestering agents sold by Monsanto and alkanehydroxy phosphonates. Other suitable organic builders/sequestrants include the higher molecular weight polymers and 10 copolymers known to have builder properties. For example, such materials include appropriate polyacrylic acid, polymaleic acid, and polyacrylic/polymaleic acid copolymers and their salts, for example those sold by BASF under the name SOKALAN™. A preferred sequestrant is Dequest® 2066 (Diethylenetriamine penta(methylene phosphonic acid) or Heptasodium DTPMP). Other suitable sequestrant is HEDP (1 -Hydroxyethylidene -1,1, -diphosphonic acid), 15 for example sold as Dequest 2010. Preferably the sequestrant is selected from amino-phosphonic acid, phosphonic acid, amino carboxylic acid, and salts thereof. Preferably the sequestrant is selected from Diethylenetriamine penta (methylene phosphonic acid- heptasodium salt (DTPMPA), 1- Hydroxyethylidene 1,1-diphosphonic acid (HEDP), Trisodium salt of Methylglycinediacetic acid 20 (MGDA), N, N-Dicarboxymethyl glutamic acid tetrasodium salt (GLDA) and combinations thereof. Most preferred sequestrant is diethylenetriamine penta (methylene phosphonic acid- heptasodium salt (DTPMPA) and/or 1-hydroxyethylidene 1,1-diphosphonic acid (HEDP). The flexible solid laundry article preferably comprises 0.1 to 10% by weight, more preferably 0.2 to 9% by weight, even more preferably 0.3 to 8% by weight and most preferably 0.4 to 7 % by 25 weight of the sequestrant. Perfume According to the present invention the flexible solid laundry article preferably comprises a perfume. 30 Preferably the perfume is in the form of free perfume. By free perfume is meant perfume which is not encapsulated as part of a delayed or controlled release mechanism. Preferably the free perfume comprises ester perfume component having the structure where R₁ and R₂ are P0000778 CPL 31 independently selected from C₁ to C₃₀ linear or branched, cyclic or non-cyclic, aromatic, or non- aromatic, saturated or unsaturated, substituted, or unsubstituted alkyl group. It is also preferred that the free perfume is selected from those having a functional group selected from aldehyde, carboxylic acid, and mixtures thereof. The aldehyde may be aliphatic, cycloaliphatic, aromatic, 5 araliphatic and mixtures thereof. The term aldehyde in the context of the free perfume also includes the corresponding acetals, ester, and lactones. The esters include the aliphatic carboxylic acid esters, esters of cyclic alcohols, esters of cycloaliphatic carboxylic acids, aromatic and araliphatic carboxylic acid esters. 10 Preferably, the perfume comprises a component selected from the group consisting of ethyl-2- methyl valerate (manzanate), limonene, (4Z)-cyclopentadec-4-en-1-one, dihyromyrcenol, dimethyl benzyl carbonate acetate, benzyl acetate, spiro[1,3-dioxolane-2,5'-(4',4',8',8'- tetramethyl-hexahydro-3',9'-methanonaphthalene)], benzyl acetate, Rose Oxide, geraniol, methyl nonyl acetaldehyde, decanal, octanal, undecanal, verdyl acetate, tert-butylcyclohexyl 15 acetate, cyclamal, beta ionone, hexyl salicylate, tonalid, phenafleur, octahydrotetramethyl acetophenone (OTNE), the benzene, toluene, xylene (BTX) feedstock class such as 2-phenyl ethanol, phenoxanol and mixtures thereof, the cyclododecanone feedstock class, such as habolonolide, the phenolics feedstock class such as hexyl salicylate, the C5 blocks or oxygen containing heterocycle moiety feedstock class such as gamma decalactone, methyl 20 dihydrojasmonate and mixtures thereof, the terpenes feedstock class such as dihydromycernol, linalool, terpinolene, camphor, citronellol and mixtures thereof, the alkyl alcohols feedstock class such as ethyl-2-methylbutyrate, the diacids feedstock class such as ethylene brassylate, and mixtures of these components. 25 Preferably the perfume is selected from the group consisting of geraniol, phenafleur, cyclamal, betaionone, verdyl acetate dimethylbenzyl carbinol acetate, dihydromrycenol, limonene, oxazolidine compound, silicic acid ester and diricinoleates or combinations thereof. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15wt.% and 30 especially preferably from 6 to 10% wt. of the perfume component ethyl-2-methyl valerate (manzanate). Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15 wt.% and especially preferably from 6 to 10% wt. of the perfume component limonene. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component P0000778 CPL 32 (4Z)-cyclopentadec-4-en-1-one. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component dimethyl benzyl carbonate acetate. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume 5 component dihyromyrcenol. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component rose oxide. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component tert-butylcyclohexyl acetate. 10 Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component verdyl acetate. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component benzyl acetate. Preferably, the perfume 15 comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component spiro[1,3-dioxolane-2,5'-(4',4',8',8'-tetramethyl-hexahydro- 3',9'-methanonaphthalene)]. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component geraniol. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% 20 and especially preferably from 6 to 10% wt. of the perfume component methyl nonyl acetaldehyde. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15% and especially preferably from 6 to 10% wt. of the perfume component cyclamal. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15wt.% and especially preferably from 6 to 10% wt. of the perfume component beta ionone. Preferably, the 25 perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15wt.% and especially preferably from 6 to 10% wt. of the perfume component hexyl salicylate. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15wt.% and especially preferably from 6 to 10% wt. of the perfume component tonalid. Preferably, the perfume comprises from 0.5 to 30% wt., more preferably from 2 to 15wt.% and especially preferably from 30 6 to 10% wt. of the perfume component phenafleur. Preferably, the perfume comprises a component selected from the benzene, toluene, xylene (BTX) feedstock class. More preferably, the perfume component is selected from 2-phenyl ethanol, phenoxanol and mixtures thereof. Preferably, the perfume comprises a component selected from the cyclododecanone feedstock class. More preferably, the perfume component is habolonolide. Preferably, the perfume 35 comprises a component selected from the phenolics feedstock class. More preferably, the P0000778 CPL 33 perfume component is hexyl salicylate. Preferably, the perfume comprises a component selected from the C5 blocks or oxygen containing heterocycle moiety feedstock class. More preferably, the perfume component is selected from gamma decalactone, methyl dihydrojasmonate and mixtures thereof. Preferably, the perfume comprises a component 5 selected from the terpene feedstock class. More preferably, the perfume component is selected from, linalool, terpinolene, camphor, citronellol and mixtures thereof. Preferably, the perfume comprises a component selected from the alkyl alcohols feedstock class. More preferably, the perfume component is ethyl-2-methylbutyrate. Preferably, the 10 perfume comprises a component selected from the diacids feedstock class. More preferably, the perfume component is ethylene brassylate. Preferably, the perfume component listed above is present in the flexible solid laundry unit dose article in an amount ranging from 0.0001 to 1% by wt. of the composition. 15 Preferably the free perfume may be in the form of a perfume oil. The perfume oil is preferably selected from the group of extracts from natural raw materials, such as essential oils, concentrates, absolutes, resins, resinoids, balsams, tinctures, and mixtures thereof. 20 Encapsulated perfume Preferably the perfume is in the form of encapsulated perfume. Typically, the encapsulated perfume comprises 10 wt.% to 98 wt.% core material comprising perfume, 1 wt.% to 40 wt.% wall material and optionally 0.2 wt.% to 6 wt.% crosslinking agent. 25 Preferably the encapsulated perfume has at least one perfume encapsulated in an amine- aldehyde resin. More preferably the amine-aldehyde resin is melamine-formaldehyde. The amine-aldehyde resin may be crosslinked with known crosslinking agents, including but not limited to gelatine. It is also preferred that the encapsulated perfume has an encapsulation material which is an amine group-bearing polysiloxanes crosslinked by polyisocyanates. 30 Another preferred approach is to have encapsulated perfume with silicate walls derived from alkoxysilanes. The amine-aldehyde resin wall material may be preferably strengthened by inorganic materials such as oxides. Preferably the encapsulated perfume is a starch-based capsule. P0000778 CPL 34 The encapsulated perfume may be microcapsules. Generally, microcapsules comprise a shell material and a core material, said shell material encapsulating said core material said core material comprising a perfume composition. Preferably the flexible solid laundry article comprises from 0.1 wt.% to 20 wt.% perfume by weight of the flexible laundry article. 5 The wall material or shell of the encapsulated perfume may be selected from the group consisting of polyethylenes; polysiloxanes, polyamide, polyamides; polystyrenes; polyisoprenes; polycarbonates; polyesters; polyacrylates; aminoplasts, in one aspect said aminoplast comprises a polyureas, polyurethane, and/or polyureaurethane, in one aspect said polyurea 10 comprises polyoxymethyleneurea and/or melamine formaldehyde; polyvinylamine, polyvinyl formamide, polyolefins; polyvinyl alcohol, polysaccharides, in one aspect alginate and/or chitosan; gelatin; shellac; epoxy resins; vinyl polymers; water insoluble inorganics; silicone; and mixtures thereof. The shell material is also preferably selected from polysiloxanes, polyanhydride, polysulfone, polysaccharide, protein, polylactide (PLA), polyglycolide (PGA), 15 polyorthoester, polyphosphazene, lipid, modified cellulose, gums, polystyrene, and polyesters or combinations of these materials. Other polymeric wall materials that are functional are ethylene maleic anhydride copolymer, styrene maleic anhydride copolymer, ethylene vinyl acetate copolymer, and lactide glycolide copolymer. The micro encapsule may have a volume weighted mean particle size from microns to 45 microns more preferably from g microns to 25 20 microns, or alternatively a volume weighted mean particle size from 25 microns to 60 microns, more preferably from 25 microns to 60 microns. Preferably the shell comprises melamine formaldehyde and/or cross-linked melamine formaldehyde. Preferably the shell material may be coated. Preferably the coating may be cationic, nonionic, 25 or anionic. Preferably the coating is a water-soluble cationic polymer selected from the group consisting of polysaccharides, cationically modified starch and cationically modified guar, polysiloxanes, dimethyl diallyl ammonium polyhalogenides, copolymers dimethyl diallyl ammonium polychloride and vinyl pyrrolidone, acrylamides, imidazoles, imidazolinium halogenides and imidazolium halogenides and polyvinyl amine and its copolymers with N-vinyl 30 formamide. In one example, the coating that coats said shell, comprises a cationic polymer and an anionic polymer. In another example. said cationic polymer comprises hydroxyl ethyl cellulose; and said anionic polymer comprises carboxyl methyl cellulose. Microcapsules of the current invention are preferably formed by a variety of procedures that 35 include, but are not limited to, coating, extrusion, spray-drying, interfacial, in-situ and matrix P0000778 CPL 35 polymerization. The possible shell materials vary widely in their stability toward water (i.e., laundry washing and laundry rinsing). Among the most stable are polyoxymethyleneurea (PMU)-based materials, which include but are not limited to urea-formaldehyde and/or melamine-formaldehyde. Similarly, if a shell is temperature sensitive, a microcapsule might 5 release perfume in response to elevated temperatures. Microcapsules may also release perfume in response to shear forces applied to the surface of the microcapsules. Bioencapsulated perfume: Preferably the encapsulated perfume is bio(micro)encapsulated perfume. Biopolymers that are derived from alginate, chitosan, collagen, dextran, gelatin, gum 10 arabic, silk and starch can also be used as the encapsulating materials. The wall material or shell material of these microcapsules preferably includes biopolymers, more preferably the shell material comprises protein polymers, polysaccharide polymers and combinations thereof. The protein and/or polysaccharide may be treated by various processes to provide derivatives, including but not limited to hydrolysis, condensation, functionalizing such as ethoxylating, 15 crosslinking, etc. The microcapsule wall materials are preferably in an aqueous solution. The microcapsule wall preferably comprises 20 wt.% to 100 wt.% protein, polysaccharide, or combinations thereof, more preferably 30 wt.% to 98 wt.%, more preferably 35 wt.% to 95 wt.%, and most preferably 65 wt.% to 90 wt.% by weight of the microcapsule wall. 20 The polypeptide may exhibit an average molecular weight of from 1,000 Da to 40,000,000 Da, preferably greater than 10,000 Da, more preferably, 100,000 Da, most preferably greater than 1,000,000 Da and preferably less than 3,000,000 Da. The protein used in the microcapsule can also be derivatized or modified (e.g., derivatized or chemically modified). For example, the protein can be modified by covalently attaching sugars, lipids, cofactors, peptides, or other 25 chemical groups including phosphate, acetate, methyl, and other natural or unnatural molecule. Suitable proteins for use in this invention include whey proteins, plant proteins and gelatin. Particularly preferred proteins include proteins selected from chickpea, pea proteins, potato proteins, brown rice proteins, white rice proteins, wheat proteins, barley proteins, pumpkin seed proteins, oat proteins, almond proteins, and combinations thereof. This includes derivatives of 30 the aforementioned proteins. Preferably the shell material of the microcapsules is a polysaccharide polymer. “Polysaccharide” as used herein means a natural polysaccharide, polysaccharide derivative, and/or modified polysaccharide. Suitable polysaccharides maybe selected from the group 35 consisting of fibers, starch, sugar alcohols, sugars, and mixtures thereof. P0000778 CPL 36 Examples of suitable fibers include: particular cellulose, cellulose derivatives such as hydroxyethyl cellulose, in particular quaternized hydroxyethyl cellulose, carboxymethylcellulose (CMC) and microcrystalline cellulose (MCC), hemicelluloses, lichenin, chitin, chitosan, lignin, xanthan, plant fibers, in particular cereal fibers, potato fibers, apple fibers, citrus fibers, bamboo 5 fibers, extracted sugar beet fibers; oat fibers and soluble dietary fibers, in particular inulin, especially native inulin, highly soluble inulin, granulated inulin, high performance inulin, pectins, alginates, agar, carrageenan, gum arabic (Senegal type, Seyal type), konjac gum, gellan gum, curdlan (paramylon), guar gum, locust bean gum, xanthan gum, raffinose, xylose, polydextrose and lactulose and combinations thereof. This includes derivatives of the aforementioned 10 polysaccharides. Particularly preferred polysaccharides include gum Arabic, dextrins and maltodextrins are particularly preferred. The polysaccharide used in the microcapsule can also be derivatized or modified (e.g., derivatized or chemically modified). For example, the protein can be modified by covalently attaching sugars, lipids, cofactors, peptides, or other chemical groups including phosphate, acetate, methyl, and other natural or unnatural molecule. 15 Examples of suitable polysaccharide derivatives include starch glycolate, carboxymethyl starch, hydroxyalkyl cellulose and cross-linked modified cellulose. Polymeric microcapsules suitable for use in the invention will generally have an average particle size between 100 nanometers and 50 microns. Particles larger than this are entering the visible 20 range. Examples of particles in the sub-micron range include latexes and mini-emulsions with a typical size range of 100 to 600 nanometers. The preferred particle size range is in the micron range. Examples of microcapsules in the micron range include polymeric core-shell microcapsules (such as those further described above) with a typical size range of 1 to 50 microns, preferably 5 to 30 microns. The average particle size can be determined by light 25 scattering using a Malvern Mastersizer with the average 20 particle size being taken as the median particle size D (0.5) value. The particle size distribution can be narrow, broad, or multimodal. If necessary, the microcapsules as initially produced may be filtered or screened to produce a product of greater size uniformity. The microcapsule preferably comprises from 0.1 wt.% to 30 wt.% microcapsule wall, preferably 0.5 wt.% to 25 wt.%, more preferably 1 wt.% to 30 20 wt.% and 2 wt.% to 15 wt.% microcapsule wall by weight of the microcapsule. Crosslinking agent: The microcapsule wall polymers described herein are preferably crosslinked. Suitable methods of crosslinking include isocyanate crosslinking, salt bridge cross linking, carbonyl cross linking and internal crosslinking within the microcapsule wall polymer 35 structures (including the formation of a coacervate). Examples of carbonyl crosslinking agent P0000778 CPL 37 includes dialdehydes such as glutaric dialdehyde, succinic dialdehyde; bis(dimethyl) acetal, bis(diethyl) acetal, polymeric dialdehyde such as oxidized starch. Also preferred are low molecular weight difunctional aldehyde such as 1,3 propane dialdehyde, 1,4 butane dialdehyde, glyoxal, 1,5 pentane dialdehyde and 1,6 hexane dialdehyde. An alternative crosslink agent 5 suitable for use in the present invention are ionic crosslinking agents. Ionic crosslinking agents are multivalent ions which are capable of forming salt bridges with the functional groups of the protein or polysaccharide polymers. Particularly preferred are calcium salts, magnesium, sodium, potassium, strontium, barium, zinc. Internal cross linking is cross linking between the microcapsule wall polymers, without the use of a crosslinking agent. The internal crosslinking 10 maybe crosslinking with the same polymer (i.e., a polymer with both positive and negative charges) or between two different polymers forming the microcapsule wall. When two different polymers of opposite charges are utilised, this is referred to as a coacervate formed by coacervation. Preferably a coacervate is formed between a first protein or polysaccharide of one charge and a second protein or polysaccharide of an opposite charge. The ratio between 15 polymer with a positive charge and polymer with a negative charge is preferably between 10/0.1 to 0.1/10, more preferably between 10/1 and 1/10 and most preferably between 6/1 and 1/6. Perfume core material: Perfume components are well known in the art. Useful perfume components may include materials of both natural and synthetic origin. They include single 20 compounds and mixtures. Specific examples of such components may be found in the current literature, e.g., in Fenaroli's Handbook of Flavor Ingredients, 1975, CRC Press; Synthetic Food Adjuncts, 1947 by M. B. Jacobs, edited by Van Nostrand; or Perfume and Flavor Chemicals by S. Arctander 1969, Montclair, N.J. (USA). These substances are well known to the person skilled in the art of perfuming, flavouring, and/or aromatizing consumer products. Particularly 25 preferred perfume components are blooming perfume components and substantive perfume components. Perfume perfume components are defined by a boiling point less than 250°C and a LogP greater than 2.5. Preferably encapsulated perfume compositions comprise at least 20 wt.% blooming perfume ingredients, more preferably at least 30 wt.% and most preferably at least 40 wt.% blooming perfume ingredients. Substantive perfume components are defined by a 30 boiling point greater than 250°C and a LogP greater than 2.5. Preferably encapsulated perfume compositions comprise at least 10 wt.% substantive perfume ingredients, more preferably at least 20 wt.% and most preferably at least 30 wt.% substantive perfume ingredients. Boiling point is measured at standard pressure (760 mm Hg). Preferably a perfume composition will comprise a mixture of blooming and substantive perfume components. The perfume 35 composition may comprise other perfume components. It is commonplace for a plurality of P0000778 CPL 38 perfume components to be present in a microcapsule. In the compositions for use in the present invention it is envisaged that there will be three or more, preferably four or more, more preferably five or more, most preferably six or more different perfume components in a microcapsule. An upper limit of 300 perfume components may be applied. 5 Preferably the amount of encapsulated perfume is from 5 wt.% to 95 wt.%, preferably 10 wt.% to 90 wt.% more preferably 15 wt.% to 85 wt.%, and most 20 wt.% to 80 wt.% by weight of the microcapsule. 10 Deposition aid: Polymeric microcapsules suitable for use in the invention may be provided with a deposition aid at the outer surface of the microcapsules. Deposition aids serve to modify the properties of the exterior of the microcapsule, for example to make the microcapsule more substantive to a desired substrate. Desired substrates include cellulosics (including cotton) and polyesters (including those employed in the manufacture of polyester fabrics). The deposition 15 aid may suitably be provided at the outer surface of the microparticle by means of covalent bonding, entanglement, or strong adsorption. Examples include polymeric core-shell microcapsules (such as those further described above) in which a deposition aid is attached to the outside of the shell, preferably by means of covalent bonding. While it is preferred that the deposition aid is attached directly to the outside of the shell, it may also be attached via a 20 linking species. Deposition aids for use in the invention will generally have a weight average molecular weight (M_w) in the range of from about 5 kDa to about 500 kDa, preferably from about 10 kDa to about 500 kDa and more preferably from about 20 kDa to about 300 kDa. Deposition aids for use in the invention may suitably be selected from polysaccharides having 25 an affinity for cellulose. Such polysaccharides may be naturally occurring or synthetic and may have an intrinsic affinity for cellulose or may have been derivatized or otherwise modified to have an affinity for cellulose. Suitable polysaccharides have a 1-4 linked (β glycan (generalized sugar) backbone structure with at least 4, and preferably at least backbone residues which are (β 1-4 linked, such as a glucan backbone (consisting of (β 1-4 linked glucose residues), a 30 mannan backbone (consisting of β 1-4 linked mannose residues) or a xylan backbone (consisting of (β 1-4 linked xylose residues) Examples of such (β 1-4 linked polysaccharides include xyloglucans, glucomannans, mannans, galactomannans, (β (1-3),(1-4) glucan and the xylan family incorporating glucurono-, arabino- and glucuronoarabinoxylans. Preferred (β 1-4 linked polysaccharides for use in the invention may be selected from xyloglucans which has a β35 1-4 linked glucan backbone with side chains of a-D xylopyranose and (β -D-galactopyranosyl- P0000778 CPL 39 (1-2)- α -D-xylo-pyranose, both 1-6 linked to the backbone), and galactomannans such as locust bean gum (LBG) (which has a mannan backbone of β 1-4 linked mannose residues, with single unit 20 galactose side chains linked α1-6 to the backbone). Also suitable are polysaccharides which may gain an affinity for cellulose upon hydrolysis, such as cellulose 5 mono-acetate; or modified polysaccharides with an affinity for cellulose such as hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, hydroxypropyl guar, hydroxyethyl ethylcellulose, and methylcellulose. Deposition aids for use in the invention may also be selected from phthalate containing 10 polymers having an affinity for polyester. Such phthalate containing polymers may have one or more nonionic hydrophilic segments comprising oxyalkylene groups (such as oxyethylene, polyoxyethylene, oxypropylene or polyoxypropylene groups), and one or more hydrophobic segments comprising terephthalate groups. Typically, the oxyalkylene groups will have a degree of polymerization of from 1 to about 400, preferably from 100 to about 350, more 15 preferably from 200 to about 300. A suitable example of a phthalate containing polymer of this type is a copolymer having random blocks of ethylene terephthalate and polyethylene oxide terephthalate. Preferably the deposition aid may be a deposition protein, e.g., a protein-silanol copolymer, a protein-silane copolymer, a protein-siloxane copolymer, or a cationically modified protein, is provided. More preferably, any deposition aid used is biodegradable according to the 20 OECD Standard 301F. Mixtures of any of the above-described materials may also be suitable. Preferably the encapsulated perfume includes a capsule formation aid. The capsule formation 25 aid improves the performance. The capsule formation aid may be a surfactant, dispersant, protective colloid, or emulsifier. The concentration of the capsule formation aid varies from 0.1 wt.% to 5 wt.% by weight of the capsule composition. The encapsulated perfume may include a catalyst. A catalyst is added to induce the interfacial 30 polymerization in the formation of the capsule wall. Preferred examples include metal carbonate, metal hydroxide, amino or organometallic compounds which includes sodium carbonate, cesium carbonate, potassium carbonate, lithium hydroxide, 1,4-diazabicyclo (2.2.2) octane (i.e., DABCO), N, N-dimethylaminoethanol, N, N-dimethylcyclohexylamine, bis-(2- dimethylaminoethyl) ether, N, N dimethylacetylamine, stannous octoate, and dibutyltin dilaurate. 35 P0000778 CPL 40 One example of a particularly preferred polymeric core-shell microcapsule for use in the invention is an aminoplast microcapsule with a shell formed by the polycondensation of melamine with formaldehyde; surrounding a core containing the perfume formulation; in which a deposition aid is preferably attached to the outside of the shell by means of covalent bonding. 5 The preferred deposition aid is selected from β 1-4 linked polysaccharides, and in particular the xyloglucans of plant origin, as are further described above. The microcapsules may be friable or soluble in the wash liquor. Friable microcapsules survive the washing process intact and are deposited onto the fabric where they remain until the fabric 10 garment is dried and prepared for re-wear. On wearing or handled, the friable capsules are prone to breakage thus releasing the perfume (or perfume, the terms are used interchangeably). "Friability' refers to the propensity of the microcapsules to rupture or break open when subjected to direct external pressures or shear forces. Soluble microcapsules dissolve during the washing process and release their contents, whether perfume or other 15 benefit agent such as lipase or other enzyme during the washing process. Of course, the composition may contain a combination of microcapsules whether differing in size or performance to tailor the delivery of any contained benefit agent. Friable perfume microcapsules are distinguished from moisture-activated microcapsules such as those microcapsules comprising mostly of cyclodextrin. 20 The microcapsules may be provided simply as microcapsules but preferably are provided in a microcapsule composition comprising microcapsules in a slurry. The microcapsules comprise a microcapsule core comprising an active ingredient and microcapsule wall encapsulating the core. The microcapsule wall comprises a wall polymer and preferably a crosslinking agent. 25 Preferably the microencapsulated perfume may be present in a composition comprising the microencapsulated perfume, preferably coated with a deposition aid along with a free perfume. Preferably, the amount of perfume in the flexible solid laundry article perfume ranges from 0.5 30 to 30% wt., more preferably from 2 wt.% to 15wt.% and especially preferably from 2 wt.% to 10% wt. perfume. Preferably the perfume is a free perfume oil. Preferably the free perfume oil is present in an amount ranging from ranges from 0.5 to 30% wt., more preferably from 2 wt.% to 15wt.% and especially preferably from 2 wt.% to 10% wt. by weight of the laundry article. P0000778 CPL 41 Preferably the perfume is an encapsulated perfume. Preferably the encapsulated perfume is present in an amount ranging from 0.5 to 30% wt., more preferably from 2 wt.% to 15wt.% and especially preferably from 2 wt.% to 10% wt. by weight of the laundry article. 5 Preferably the perfume is post-dosed that is after the formation of the flexible laundry article. Alternately the perfume may be added to the wet pre-mixture before the solidication of the pre- mixture to form the flexible solid laundry article. Also preferred are the addition of the perfume in both the post-dosed and along with the wet pre-mixture. If the flexible solid laundry article comprises a step of embossing then the perfume is preferably added after the embossing. 10 Process for preparing the flexible solid laundry article The process for forming the flexible solid laundry article according to an aspect of the present invention involves the steps of preparing a pre-mixture of ingredients, preferably homogeneous pre-mixture is vigorously aerated to form an aerated pre-mixture, subsequently the pre-mixture 15 is subject to solidification to form a flexible solid laundry article. Preferably the solidification is by heat drying by a batch process. (e.g., in a convection oven or a microwave oven) or by slow heating on a conveyer. Process like continuous drying (e.g., using an impingement oven) is also within the scope of the present invention. Preferably the flexible solid laundry article porous. Preferably the pores formed across different regions of the flexible laundry detergent article is 20 uniform. The flexible solid laundry article of the present invention is formed from a wet pre-mixture comprising the water-soluble polymer, the water-insoluble disintegrant and the cleaning ingredient. 25 The flexible solid laundry article according to the present invention is preferably prepared by a process which involves the following steps: (i) dissolving or dispersing the water-soluble polymer comprising a cellulose ether derivative, water insoluble disintegrant in an aqueous medium or a suitable solvent to 30 form a wet pre-mixture; (ii) dosing the homogeneous wet pre-mixture in a laminar form onto a moving support to form a continuous sheet having opposing first side and second side; (iii) drying the sheet to form a flexible solid sheet; (iv) detaching the solid sheet from the moving support; P0000778 CPL 42 (v) optionally cutting the continuous flexible solid sheet into a desired size to form a flexible solid laundry article; (vi) optionally packaging the formed flexible solid laundry article. 5 The process for preparing the flexible solid laundry article according to the present invention involves the below described steps which includes: Preparing a homogeneous wet pre-mixture The first step involves mixing the water-soluble polymer comprising a cellulose ether derivative, 10 the water insoluble disintegrant, the cleaning ingredient, and other preferred ingredients described hereinabove in an aqueous medium or a suitable solvent to form a wet pre-mixture. Preferably the wet pre-mixture is a homogeneous mixture The wet pre-mixture may be mixed using any mixing means known to a person skilled in the art including but not limited to a mechanical mixer. Preferably when mixing the mixture may be maintained at a temperature of 15 20°C to 90°C, more preferably 30°C to 90°C, even more preferably 40°C to 90°C and most preferably from 50°C to 80°C. Preferably the wet pre-mixture has a viscosity ranging from 1000 cps to 25,000 cps when measured at 40°C at 1sec^-1, more preferably from 3000 cps to 24,000 cps, even more 20 preferably from 5000 cps to 23,000 cps, still more preferably from 10,000 cps to 20,000 cps when measured at 40°C at 1sec^-1. The wet pre-mix may have a viscosity such that is suitable to cast on a surface to form a thin layer or cast on a mold to form an article. The liquid premix may have a viscosity in the range 25 10 to 2000 mPa.S, more preferably 15 to 1500 mPa.S, even more preferably 20 to 1000 mPa.S and most preferably 25 to 500 mPa.S at 20 S^-1 shear rate and 25 ºC. Preferably the solid content in the wet pre-mixture or homogeneous wet pre-mixture ranges from 15 wt.% to 70 wt.%, still preferably from 20 wt.% to 50 wt.%, still further preferably from 25 30 wt.% to 45 wt.% by total weight of the wet pre-mixture. By solid content it is meant to include solid ingredient, semi-solid ingredient and other liquid ingredient excluding water and volatile material when added to form the premix. Preferably the wet pre-mixture comprises surfactant. Other preferred ingredient in the wet pre- 35 mixture mixture includes plasticizers and laundry benefit agents. P0000778 CPL 43 Aeration of wet pre-mixture Preferably the process for preparing the flexible solid laundry article involves a step of aeration. The term "aerate", "aerating" or "aeration" as used herein refers to a process of introducing a gas by mechanical and/or chemical means. Preferably the wet pre-mixture, preferably a 5 homogeneous wet pre-mixture is aerated by introducing a gas into the wet pre-mixture. Preferably the wet pre-mixture is pre-heated immediately prior to and/or during the aeration process at above ambient temperature but below any temperature that would cause degradation of the components therein. Preferably the wet pre-mixture is kept at temperature 10 ranging from 40°C to about 100°C, preferably from 50°C to 95°C, more preferably from 60°C to 90°C, most preferably from 75°C to 85°C. Aeration step introduces air bubbles into the wet pre- mixture which upon drying forms open pores in the flexible solid laundry article. Preferably, the aerated wet pre-mixture has a density ranging from about 0.05 g/mL to about 0. 15 5 g/ mL, preferably from about 0.08 g/ mL to about 0.4 g/ mL, more preferably from about 0.1 g/ mL to about 0.35 g/mL, still more preferably from about 0.15 g/ml to about 0.3 g/mL, most preferably from about 0.2 g/ mL to about 0.25 g/mL. Preferably aeration is by introducing a gas into the wet pre-mixture through mechanical 20 agitation, for example, by using any suitable mechanical processing means, including but not limited to: a rotor stator mixer, a planetary mixer, a pressurized mixer, a non-pressurized mixer, a batch mixer, a continuous mixer, a semi-continuous mixer, a high shear mixer, a low shear mixer, a submerged sparger, a continuous pressurized mixer, or any combinations thereof. Yet another method of introducing air into the wet pre-mixture is via chemical means, for example, 25 by using chemical foaming agents to provide in-situ gas formation via chemical reaction of one or more ingredients, including formation of carbon dioxide (CO₂ gas) by an effervescent system. Preferably the bubble size of the aerated wet pre-mixture, preferably a homogeneous aerated wet pre-mixture ranges from 5 to 500 micrometers, more preferably from 10 to 200 30 micrometers, even more preferably 20 to 150 micrometers and most preferably 20 to 100 micrometers. Preferably the pores formed across different regions of the flexible solid laundry article is uniform. Preferably the homogeneous wet pre-mixture is dosed to form the flexible laundry article. The 35 flexible solid laundry article may be formed as one or more sheets. The sheet-forming step can P0000778 CPL 44 be conducted in any suitable manner which is known to a person skilled in the art which includes but is not limited to extrusion, casting, molding, vacuum-forming, pressing, printing, coating, and combinations thereof. 5 Preferably the homogeneous wet pre-mixture or the aerated wet pre-mixture can be formed into a sheet by (i) casting it into trays or sheet mould, (ii) extruding it onto a continuous belt or screen of a dryer; (iii) coating it onto the outer surface of a rotary drum drier. Preferably the formed sheet has a thickness ranging from 0.5 mm to 4 mm, preferably from 0.6 10 mm to 3.5 mm, more preferably from 0.7 mm to 3 mm, still more preferably from 0.8 mm to 2 mm, most preferably from 0.9 mm to 1.5 mm. Solidification of the formed sheet Preferably the wet pre-mixture or aerated wet pre-mixture is subject to a solidification step to 15 form a flexible solid laundry article, which article is preferably porous. Preferably the solidification is by heat drying by a batch process. (e.g., in a convection oven or a microwave oven). Alternatively, the wet pre-mix may be solidified by slow heating on a conveyer. In one scenario, the convention oven is maintained at a temperature ranging from 130°C to 20 170°C and the drying step is carried out for a temperature of 45 minutes. Preferably the solidification is carried out in a microwave drying arrangement which involves simultaneous heating with substantially no temperature gradient. During the heating the aqueous medium in the wet pre-mixture is heated which preferably generates bubbles. 25 Preferably the microwave drying arrangement is maintained at a temperature ranging from 130°C to 170°C and the drying step is carried out at a low energy density microwave operated at a power of 2.0 kW and a surrounding air temperature of 54.4°C for a period of 12 minutes. Still preferably by a continuous drying (e.g., using an impingement oven) to form a flexible solid 30 laundry article, which article is porous. Preferably the pores formed across different regions of the flexible laundry detergent article is uniform. Preferably the solidification is carried out in an impingement oven based drying arrangement. Preferably the impingement oven heats the wet pre-mixture from both the top and the bottom at 35 opposing and offsetting heating directions. Preferably there is no specific temperature gradient P0000778 CPL 45 during the drying step and the entire article is nearly simultaneously heated from both its top and bottom surface. More preferably the solidification of the wet pre-mixture or aerated wet pre-mixture is carried out 5 in a rotary drum-based heating/drying arrangement. Preferably the solidification involves the step of: (i) feeding a homogeneous wet-mixture or aerated homogeneous wet-mixture to a trough; (ii) heating a drum drier placed above said feeding trough, preferably where the outer surface of the drum drier has a controlled surface temperature above the room temperature. In one case the temperature can be maintained at about 130°C. The drum drier rotates along a10 clockwise direction to pick up the homogeneous wet-mixture or aerated homogeneous wet pre- mixture from the feeding trough. The pre-mixture forms a thin sheet over the cylindrical heated outer surface of the drum drier, which rotates and dries such sheet of aerated wet pre-mixture in approximately 1 to 60 minutes, still preferably 2 to 15 minutes. Preferably the heat from the outer heated surface of the drum drier conducts to the sheet along an outward heating direction 15 which forms a temperature gradient in the sheet that decreases from the side of the sheet in contact with the heated surface of the drum direr to the opposing side of the sheet. A leveling blade may be placed near the wet-mixture pickup location to ensure a consistent thickness of the sheet so formed, although it is possible to control the thickness of sheet simply 20 by modulating the viscosity of the wet pre-mixture and the rotating speed and surface temperature of the drum drier. Once dried, the sheet can then pick up, either manually or by a scraper at the end of the drum rotation. Preferably the heat energy is applied in a direction which is: 25 • substantially aligned with the gravitational direction (i.e., with an offset angle of less than 90° therebetween) during most of the drying step; or, • offset from the gravitation direction, preferably the offset angle of 90° or more therebetween) during most of the drying step; • substantially aligned with the gravitational direction (i.e., with an offset angle of less than 30 90° in between) for less than half of the drying time and applied in a direction which is opposite or substantially opposite to the gravitation direction with an offset angle of 90° or more therebetween) for the remaining duration of the drying time, which is for more than 55%, still preferably more than 60% of the drying time. P0000778 CPL 46 Preferably the drying step is conducted under heating along a mostly "anti-gravity" heating direction which can be achieved by various means, which include but are not limited to the bottom conduction-based drying arrangement and the rotary drum-based drying arrangement. 5 Preferably the homogeneous wet-mixture or aerated homogeneous wet-mixture is filled into a mold and heated at a controlled surface temperature of the heating medium ranging from 40 to 130°C, more preferably 50 to 130°C, and most preferably 80 to 125°C for preferably a duration of around 30 minutes during the drying step. Preferably the heating direction is in a direction opposite to the gravitational direction. 10 Preferably the solid film is separated from the moving support by detaching means. Preferably the detaching means includes doctor blade device or similar devices known to a person skilled in the art. 15 Preferably the heat sensitive ingredients are added to the post-drying stage. The heat sensitive ingredients include but are not limited to enzyme and perfume ingredient. When the flexible solid laundry article according to the present invention is in the form of a multilayer structure and includes two or more sheets, the sheets are preferably assembled 20 together form a multilayered structure. The sheets can be combined and/or treated by any means known in the art, examples of which include but are not limited to, chemical means, mechanical means, and combinations thereof to form the multilayer flexible dissolvable solid article with a desired three-dimensional shape. Preferably the multilayered structure is formed by means of an adhesive, still preferably free of any adhesive by stacking the two or more 25 sheets which are self-adhering. Preferably when the flexible, solid laundry article according to the present invention is prepared from two or more flexible sheets, the process of preparing such flexible solid laundry article involves the steps of: 30 (i) providing two or more flexible sheets, wherein each of said two or more sheets comprises a water-soluble polymer comprising cellulose ether derivative and a water insoluble disintegrant; (ii) arranging said two or more flexible, dissolvable, porous sheets together to form a stack; 35 and, P0000778 CPL 47 (iii) cut-sealing said stack of sheets to form the flexible, solid laundry article. Preferably the flexible solid laundry article according to the present invention having two or more flexible sheets. Preferably the two or flexible sheets are porous sheet. Preferably the 5 contacting surfaces or said at least two adjacent sheets are essentially free of adhesive. Still preferably the process of preparing the flexible solid laundry article according to the present invention may include a sensitive functional ingredient. Preferably the process for preparing such article involves the step of preparing two or more continuous sheets preferably free of the 10 sensitive functional ingredient and then preferably superimposing two or more of said continuous sheet while including any sensitive functional ingredient therebetween, as an aqueous solution or dispersion of the sensitive functional ingredient applied on at least one of the opposite surfaces of said two or more continuous flexible sheet. Coupling the two or more continuous sheet into a single multilayer sheet structure. 15 Preferably the solid laundry sheet is cut into desired sizes. Optionally the cut unit dose article is packaged. Flexible solid laundry article according to the present invention may be of any three-dimensional 20 shapes, including but not limited to spherical, cubic, rectangular, polygonal, oblong, cylindrical, rod, sheet, flower-shaped, fan-shaped, star-shaped, disc-shaped, and the like. Preferably, the flexible solid laundry article of the present invention may be characterized by an aspect ratio ranging from 1 to 20, preferably from 1.4 to 18, preferably from 1.5 to 16, more preferably from 2 to 12, where the aspect ratio refers to the ratio of a longest side D of such solid article over a 25 shortest side that may be substantially perpendicular each other. The flexible solid laundry article of the present invention may comprise individual sheet of different colours, which are visible from an external surface of such article. The colours are aesthetically pleasing to the consumers. Two or more different colours preferably provides 30 visual cues indicative of different benefit agents present in the individual sheet. Preferably the flexible solid laundry article may comprise a first sheet that has a first colour and includes a first benefit agent and a second sheet that has a second colour and includes a second benefit, where the first colour provides a visual cue indicative of the first benefit agent, and where the second colour provides a visual cue indicative of the second benefit agent. 35 P0000778 CPL 48 Preferably the flexible solid laundry article of the present invention may include two or more sheets having different dissolution rate, such that there is a first sheet with a first dissolution rate and a second sheet with a second dissolution rate. The “dissolution rate” as used herein refers to the time (in seconds) required to completely dissolve 0.5 g of a sheet made of water- 5 soluble polymer in accordance with the present invention in 300 mL of water. Still preferably one or more functional ingredients may be sandwiched between the individual sheets of the flexible solid laundry article. The functional ingredient may be added by spraying, sprinkling, dusting, coating, spreading, dipping, injecting, or even vapor deposition. Preferably 10 the functional ingredients are located within a central region between two adjacent sheets. Functional ingredients may be selected from perfumes, softening agents, polymers, enzymes, bleaches, colorants, builders, pH modifiers and mixtures thereof. Preferably the flexible solid laundry article according to the present invention is preferably 15 prepared by a solution casting process. Preferably in the solution casting process pre-mixture of ingredients is first formed, preferably the homogeneous mixture is then vigorously aerated to form an aerated mixture, in the next step the aerated mixture is subject to solidification to form a flexible solid laundry article, which article is porous. Preferably the solidification is by heat drying by a batch process. (e.g., in a convection oven or a microwave oven). Preferably drying the 20 sheet for a drying time of from 1 minute to 60 minutes. Preferably the drying is at a temperature of from 40°C to 200°C to form a flexible solid sheet. Still preferably by a continuous drying (e.g., using an impingement oven) to form a flexible solid laundry article, which article is porous. Preferably the drying is carried out on a moving support on which the homogeneous mixture is 25 dosed in a laminar form is a cylindrical or conveyor belt. Preferably the continuous sheet with constant desired thickness is formed using a weir, guillotine, or calendar system depending on the solution viscosity. Preferably drying step of the continuous sheet is by applying heat. Preferably the solidification is carried out in a rotary drum drying arrangement where the drying is by contact-drying method. The drum is heated internally by steam or electricity. 30 The heat application may be using the known heat source which includes but is not limited to infrared, forced ventilation, hot water heating, conventional oven, and combinations thereof. The heating is preferably applied to the moving support until solidification of the sheet. P0000778 CPL 49 Alternately the wet pre-mixture or the aerated wet pre-mixture may be casted into a mold to form a sheet, next the sheet is placed on a hot surface or a heated moving melt or a heating means with a planar heated surface with a controlled surface temperature ranging from 80°C to 170°C, more preferably from 90°C to 150°C, still preferably from 100°C to 140°C. 5 Preferably the drying step is carried out by applying forced ventilation, or by utilizing a combination of applied forced ventilation and heat. Preferably any one or more of the above-mentioned process may be utilized to prepare the 10 solid flexible laundry article according to the present invention. Preferably the process for preparing involves at least one of the following additional steps: (i) edge-sealing at least a portion of the peripheral of said flexible solid laundry article; (ii) perforating said flexible solid laundry article to provide one or more apertures or holes 15 that extend through all sheets of said flexible solid laundry article; and (iii) embossing or printing on said flexible solid laundry article. Package The flexible laundry article may be packaged in a container comprising a recyclable and/or 20 biodegradable material the packaged product has an increased overall amount of recyclable and/or biodegradable material and is environmentally friendly without compromising on the product attributes. The container may comprise entirely biodegradable material such that the container in its 25 entirety can be completely broken down of a substance by microorganisms such as bacteria, fungi, yeasts, and algae; environmental heat, moisture, or other environmental factors to carbon dioxide water biomass, and inorganic material. Preferably from 90 to 99.9% wt. of the container, more preferably from 96 to 99.9% wt. consists of pulp or fibrous materials such as paper, card or board. The remainder comprising barrier materials and/or information labels. However, it is 30 preferred that any label also comprises biodegradable materials as described herein preferably paper or other fibrous or pulp based material. Suitable biodegradable materials comprises paper, cardboard from cellulose or derivatves; and may optionally comprise lignin, or derivatives; biodegradable plastics, such as bioplastics which 35 are preferably oxo-biodegradable plastics wherein biodegradation results from oxidative and P0000778 CPL 50 cell-mediated phenomena, either simultaneously or successively (as distinct from oxo- degradation which is degradation resulting from "oxidative cleavage of macromolecules" such that the plastic fragments but does not biodegrade except over a very long time). The material may also be compostable. 5 The biodegradable material comprises a bio polymer such as polylactic acid (PLA) which may be from e.g. corn starch, cassava, sugarcan etc; polyhydroxyalkanoate (PHA) including include poly-3-hydroxybutyrate (PHB or PH3B), polyhydroxyvalerate (PHV), and polyhydroxyhexanoate (PHH). A PHA copolymer called poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV); 10 biodegradable polyesters e.g. polycaprolactone (PCL), Polybutylensuccinat (PBS) polyvinylalcohol (PVA); polybutylenadipate-terephthalate (PBAT); cellulose based materials e.g. ethyl cellulose, cellulose acetate (true) Cellophane (made from wood, cotton or hemp); starch or starch based materials (from potato, rice, corn etc); sugar cane bagasse, and any combination or mixture thereof. For example PCL may be mixed with starch to improve biodegradability of 15 the PCL. The biodegradable material may comprise any biodegradable polyolefin. Biodegradable petroleum based plastics inlcude polyglycolic acid (PGA), a thermoplastic polymer and an aliphatic polyester; polybutylene succinate (PBS), which is a thermoplastic polymer resin that 20 has properties comparable to propylene; polycaprolactone (PCL), as this has hydrolysable ester linkages offering biodegradable properties. It has been shown that firmicutes and proteobacteria can degrade PCL. Penicillium sp. strain 26-1 can degrade high density PCL; though not as quickly as thermotolerant Aspergillus sp. strain ST-01. Species of clostridium can degrade PCL under anaerobic conditions; Polybutylene adipate terephthalate (PBAT) which is a 25 biodegradable random copolymer. The most preferred biodegradable materials include paper, card or board from cellulose or derivatves. 30 Preferably the biodegradable material is bio-based according to¹⁴C or radiocarbon method (EU: EN 16640 or CEN/TS 16137, International: ISO 16620-2, US: ASTM 6866). Preferably the biodegradable material is made from a renewable resource. The container material may comprise an outer layer to provide additional protection or sheen 35 (for biodegradable materials with a matt finish such as paper board) . This layer preferably P0000778 CPL 51 comprises a biodegradable polymer coating or varnish or film. Preferably the outer layer comprises any of the bio polymers described above. Preferaby the outer layer is at least present on some or all of the internal surfaces of the receptable. 5 The term fibrous or pulp material includes paper or paperboard: specifically. Preferably, the fibrous or pulp material is in the form of a sheet and is formed as a blank which is folded to form a closeable container. The closeable container can be formed from a one-piece blank or may contain multiple pieces. 10 The material useable for making the container can exhibit a grammage from 100 and 500 g/m², preferably from 200 and 400 g/m². The sheet paper material used for making the container can, in an embodiment variant thereof, be covered, for at least part of the first and/or second prevalent development surfaces, by a coating, for example a film, whose aim is to balance water transfer between the interior and the exterior of the container with leakage 15 protection. Advantageously but not in a limiting way, the coating could comprise and extrusion coating on one or both sides (inner side and/or outer side) of the paper material defining the container, with values which can for example range between 10 and 50 micrometer of the coating material. The coating plastic material can be for example selected among the following materials: LDPE, HDPE, PP, PE. 20 Preferred barrier materials include polymeric materials selected from polylactic acid, polyhydroxyalkanoate, a polyester, polybutylenadipate terephthalate, a cellulose based material, a starch based material, a sugare cane based material and mixtures thereof. 25 In a preferred embodiment the biodegradable material comprises at least two layers, more preferably at least three. The biodegradable material preferably comprises a bleached layer and which bleached layer comprises an outer layer of the biodegradable material. By outer layer is meant that the 30 bleached layer is physically outermost. A second layer comprises a non-bleached layer which is also exterior but opposite the bleached layer. The biodegradable material thus preferably comprises a bleached and un-bleached layer on opposing sides. Between the bleached and unbleached layer is preferably a filler layer comprised of post-consumer recycled material and which is preferably paper-based also. 35 P0000778 CPL 52 According to another aspect of the present invention the flexible laundry article is packaged in a container. Preferably the flexible solid laundry article which are stacked in one, two- or three- dimensional array, preferably a three-dimensional array inside the container. Preferably the container is the primary package or the secondary package. Preferably the container has a 5 compartment for containing the plurality of laundry article and a closure for the container, wherein the closure has a locking means. Preferably the container has dividing means for dividing the container compartment into sub-compartments. Preferably the container has child resistant means for deterring a child from opening the container. Preferably the container is shaped in the form of a tub, tray, box, or combinations thereof. Preferably the container 10 comprises: (i) a container body; (ii) a top panel engaged with the container body, (iii) an opening flap connected with a hinge to the top panel; (iv) a locking means integral with the opening flap and detachably attachable to the container body. Preferably the opening panel is separable from the top panel when the package is opened for the first time by means of a weakened portion provided on the top panel. Preferably the unseparated portion of the top panel after the 15 opening panel is separated form a flush seat for the opening panel in the closed position. Examples Example 1: Evaluation of different flexible solid laundry unit dose article Flexible solid laundry unit dose article according to Ex 1 to 2 were prepared following the recipe 20 provided in table 1: Table 1 Material (%w/w) Ex-1 Ex-2 Sodium linear alkyl benzene sulphonate 35.0 28.6 Cocamidopropyl betaine 2.5 2.5 Hydroxy propyl methyl cellulose 13.5 11.2 Microcrystalline cellulose 6.1 20.4 Glycerol 4.3 3.6 Tinopal CBC 1.5 1.3 Polyacrylate copolymer 9.2 7.6 Phosphonate based sequestrant 1.5 1.3 Ethoxylated polyethylene imine 6.5 5.4 P0000778 CPL 53 Soil release polymer 3.1 2.5 Perfume 6.8 5.6 Moisture 10.0 10.0 Example 2: Evaluation of flexible solid laundry article comprising different water-soluble polymers 5 Different flexible solid laundry article in the form of sheets were prepared having the composition as shown in table 2 below. For preparing the solid laundry article according to the present invention (Ex 3), water soluble polymer (Hydroxypropyl methyl cellulose with a degree of substitution of 1.4) was weighed and 10 dissolved in hot water (80°C) to provide a homogenized premix. Subsequently, rest of the ingredients were weighed, added to the premix and mixed thoroughly. The premix was casted on a surface using TQC Compact film applicator (TQC Sheen) with a draw-dawn applicator to form a wet film. The film was allowed to dry at 70°C to 90°C for 2 hours forming a sheet (flexible solid laundry article) as shown in table 2. MCC with WAR of 5. 15 Comparative flexible solid laundry article (Ex A) was prepared in the same manner as that of the inventive composition (Ex 3) using the same ingredients except that in the comparative flexible solid laundry article SCMC was used as the water-soluble polymer (having a degree of substitution of 0.4) and talc was included as the water-insoluble disintegrant (talc has a WAR of 20 0.55). Each flexible solid laundry article was evaluated for its film formability, dissolution time and disintegration time using the following method: 25 Dissolution time: For evaluating the dissolution of the sheet, each example was added in 250 mL water and allowed to dissolve. The time of dissolution was noted using a stopwatch. The results were recorded and are provided in table 2. Disintegration time: For evaluating the disintegration of the flexible solid laundry article, each 30 example was added in 250 mL of water and the time taken for the breakdown of the article into smaller fragments was noted down using a stopwatch. The results was recorded and are provided in table 2. P0000778 CPL 54 Film formability: Slurry of the solid laundry article provided in table 2 was dried on a casting substrate at a temperature of 70-80 deg C. After the drying step, if the laundry article was removable as a continuous sheet without any breakage, then the example was considered to 5 have good film formability. Table 2 Ingredient (wt.%) Ex-A Ex-3 Anionic surfactant 42.73 42.73 A^{mphoteric surfactant}_{2.32 2.32} Glycerol (plasticizer) 1.68 1.68 Water insoluble disintegrant (talc) 6.73 0 Water-insoluble disintegrant (_{microcrystalline cellulose)}^{0 6.73} HPMC 0 16.82 SCMC 16.82 0 Water 10.38 10.38 Others (Total) Upto 100 Upto 100 Disintegration time More than 20 Less than 20 seconds seconds Dissolution time More than 3 Less than 3 minutes minutes Film formability No sheet formation Sheet was formed The data provided in table 2 shows that when a flexible solid laundry article was prepared 10 according to the present invention (Ex 3) having HPMC as the water-soluble polymer with a degree of substitution of greater than 1 and MCC as the water-insoluble disintegrant with a water absorption rate of greater than 1 it provides for good sheet formation and also the formed sheet provided quick disintegration and quick dissolution. 15 On the other hand, when a flexible solid laundry article was prepared outside of the claimed invention, as shown in comparative Ex A which has SCMC as the water soluble polymer with a degree of substitution outside the claimed ranges and talc as the water-insoluble disintegrant with a water absorption rate of lower than 1 (0.55) it was seen that proper film was not formed and the disintegration time and dissolution time were comparatively longer than the Ex 320 according to the present invention.

Claims

P0000778 CPL 55 CLAIMS 1. A flexible solid unit dose laundry article comprising: i) a water-soluble polymer comprising a cellulose ether derivative wherein cellulose ether derivative has a degree substitution greater than 1; ii) a water-insoluble disintegrant having a water absorption ratio greater than 1 when measured according to the ASTM D570 method; and, iii) a cleaning ingredient; wherein the laundry article is free of polyvinyl alcohol, copolymer of polyvinyl alcohol or mixtures thereof. 2. A flexible solid laundry article according to claim 1 wherein the cleaning ingredient is selected from the group consisting of: i) amphoteric surfactant; ii) amphoteric surfactant and a N-acylated lactam compound; iii) amphoteric surfactant and a nonionic alkoxylated surfactant; iv) amphoteric surfactant and a silicone surfactant; v) amphoteric and a non-ionic homopolymer; vi) alkyl alkoxylated secondary nonionic surfactant with an average of from 1 to 35 units of alkylene oxide per mole of alcohol; vii) polyoxyethylene-polyoxypropylene block copolymer and soil release polymer; viii) enzyme; and combinations thereof. 3. A flexible solid laundry article according to claim 2 wherein the amphoteric surfactant is is selected from the group consisting of betaines, sultaines, amine oxide or mixtures thereof, preferably the amphoteric surfactant is CAPB. 4. A flexible solid laundry article according to claim 2 wherein the nonionic alkoxylated surfactant is selected from the group consisting of: (i) a polyoxyethylene-polyoxypropylene block copolymer represented by the general formula (I) (EO)_n-(PO)_m-(EO)_n ………….. Formula (I) wherein m is an integer from 10 to 130, each n is independently an integer from 2 to 60; or, P0000778 CPL 56 (ii) a polyoxyethylene-polyoxypropylene block copolymer represented by the general formula (II) (PO)_n-(EO)_m-(PO)_n ………… Formula (II) wherein m is an integer of 15 to 150 and n at each end are independently integers of about 2 to 60; or, (iii) a polyoxyethylene-polyoxypropylene block copolymer represented by the general formula (III) …….. Formula (III) where a, b, and c each represent the number of ethylene oxide or propylene oxide units in each of the blocks, and where R and R' are independently H, C₁ to C₁₈ alkyl, C₁ to C₁₈ hydroxyalkyl, or mixtures thereof; or, (iv) a polyoxyethylene-polyoxypropylene block copolymer represented by the general formula (III) where EO is ethylene oxide unit and PO is propylene oxide unit and a, b, and c, d and e each represent the number of ethylene oxide or propylene oxide units in each of the blocks, and where R and R' are independently H, C₁ to C₁₈ alkyl, C₁ to C₁₈ hydroxyalkyl or mixtures thereof; or, (v) a monomeric surfactant with an average degree of alkoxylation of from 10 to 50 represented by the general formula (IV) …….. Formula (IV) where, R¹ is linear or at least singly branched C₄ to C₂₂ alkyl or -alkylphenol, R² is C₃ to C₄ alkyl, preferably propyl, in particular n-propyl, R⁵ is C₁ to C₄ alkyl, R⁶ is methyl or ethyl, n has a mean value of from 10 to 50. m has a mean value of from 0 to 20, preferably m being at least 0.5 if R is methyl or ethyl or r has the value 0, P0000778 CPL 57 r has a mean value of from 0 to 50, preferably 0 and, s has a mean value of from 0 to 50, preferably 0. Or, (vi) a monomeric surfactant with an average degree of alkoxylation of from 10 to 50 represented by the general formula (V) …….. Formula (V) where R³ is branched or straight chain C₄ to C₂₂ alkyl or -alkylphenol, R⁴ is C₃ to C₄ alkyl, p has a mean value of from 10 to 50, and, q has a mean value of from 0.5 to 20, preferably from 0.5 to 4, more preferably from 0.5 to 2. 5. A flexible solid laundry article according to claim 2 wherein the non-ionic homopolymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, polybutylene glycol and mixtures thereof, preferably the non-ionic homopolymer is polyethylene glycol. 6. A flexible solid laundry article according to claim 2 wherein the enzyme is selected from the group consisting of lipase, amylase, mannanase, laccase, cellulase, protease and mixtures thereof. 7. A flexible solid laundry article according to claim 2 wherein the cleaning agent is an amino acid surfactant selected from sodium lauroyl glutamate, sodium cocoyl glutamate, potassium lauroyl glutamate, sodium cocoyl alaninate, sodium cocoyl glycinate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium cocoyl methyl taurate, sodium lauryl methyl isethionate, sodium cocoyl isethionate, or sodium oleoyl sarcosinate and combinations thereof. 8. A flexible solid laundry article according to any one of the preceding claims wherein the article is porous and has a density ranging from 0.05 grams/cm³ to 0.5 grams/cm³. 9. A flexible solid laundry article according to any one of the preceding claims wherein the water-insoluble disintegrant is selected from microcrystalline cellulose, alkali metal salt of starch glycolate, croscarmellose, pregelatinized starch and mixtures thereof. P0000778 CPL 58 10. A flexible solid laundry article according to any one of the preceding claims wherein the cellulose ether derivative is selected from is selected form hydroxypropyl methyl cellulose, methyl cellulose, hydroxypropyl cellulose, and combinations thereof. 11. A flexible solid laundry article according to any one of the preceding claims wherein the article comprises a graphene or a derivative thereof selected from the group consisting of graphene oxide, reduced graphene oxide and mixtures thereof, preferably the graphene or derivative thereof is present in an amount ranging from 0.001 wt.% to 1 wt.% by weight of the article. 12. A flexible solid laundry article according to any one of the preceding claims wherein the article comprises a slip additive, preferably the slip additive is present in an amount ranging from 0.001 to 1 wt.% by weight of the article. 13. A flexible solid laundry article according to claim 12 wherein the slip additive is selected from the group consisting of erucamide, oleamide, stearamide and mixtures thereof. 14. A flexible solid laundry article according to any one of the preceding claims wherein the article comprises a sequestrant, preferably selected from the group consisting of amino- phosphonic acid, phosphonic acid, amino carboxylic acid and salts thereof. 15. A flexible solid laundry article according to claim 14 wherein the sequestrant is selected from diethylenetriamine penta (methylene phosphonic acid- hepta sodium salt (DTPMPA), 1-hydroxyethylidene 1,1-diphosphonic acid (HEDP), trisodium salt of methylglycinediacetic acid (MGDA), N, N-dicarboxymethyl glutamic acid tetrasodium salt (GLDA) and combinations thereof, more preferably the sequestrant is diethylenetriamine penta (methylene phosphonic acid- hepta sodium salt (DTPMPA) and/or 1- hydroxyethylidene 1,1-diphosphonic acid (HEDP).