CN110904683A - Functional PVC polyester coated yarn for sun-shading fabric and preparation method thereof - Google Patents

Abstract

The invention discloses a functional PVC polyester covered yarn for a sun-shading fabric and a preparation method thereof, the functional PVC polyester covered yarn comprises a core yarn consisting of polyester filament yarns, a coating layer is coated outside the core yarn through a coating process, the wire diameter of the PVC polyester covered yarn is 0.3-0.8 mm, and the coating layer is prepared from the following raw materials in parts by weight: 40-80 parts of polyvinyl chloride; 2-5 parts of far infrared emission particles; 1-3 parts of a heat stabilizer; 20-30 parts of a plasticizer; 3-8 parts of an antioxidant; 6-10 parts of calcium carbonate filler. According to the invention, a single polyester filament is changed into a plurality of polyester filament bundles, compared with the traditional single polyester filament, the coated filament formed by coating is softer in texture, can provide a larger thickness space for the coating layer 3 and is relatively smaller in hardness. The thickness of the coating layer 3 is increased, which is equivalent to adding more tourmaline 4 particles, greatly increasing the far infrared emission performance, improving the heat conversion efficiency, and having obvious energy-saving effect and no light pollution through the conversion principle.

Description

Functional PVC polyester coated yarn for sun-shading fabric and preparation method thereof

Technical Field

The invention relates to the technical field of polymer composite materials, in particular to functional PVC polyester coated yarns for sun-shading fabrics and a preparation method thereof.

Background

The sun-shading fabric is used for shading strong sunlight and harmful light from entering. The fabric has partial functions which other fabrics do not have, such as indoor temperature adjustment, natural light adjustment, perspective and the like, and can effectively block ultraviolet rays. With the rapid development of industrial technology in China and the continuous improvement of living standard of people, the demand of functional sun-shading materials is increasing day by day, and the research and development of PVC coated filaments with special functions are needed.

CN103627114A provides a high-stability PVC clad material and a preparation method thereof, the PVC clad material mainly comprises: PVC, a polyester plasticizer, an ultraviolet-resistant absorbent, an antistatic agent, titanium dioxide, a high-efficiency flame retardant and a high-color-fastness pigment. The PVC coated filament prepared by coating the PVC coating material and the high-strength polyester fiber has high stability, the sun-shading material produced by the PVC coated filament does not deform in high-temperature and high-humidity regions of the equatorial countries, the color fastness reaches the national standard grade 6-7, the flame retardant grade reaches the American NFPA701-2010, and the effect of resisting bacteria or moulds such as staphylococcus aureus, klebsiella pneumoniae, aspergillus niger, chaetomium globosum, aureobasidium pullulan, penicillium pinophilum, gliotobacter viride and the like reaches more than 99%.

CN208087824U discloses a novel compound cladding silk of fluorescence, including the yarn core, the outer end of yarn core covers there is the yarn core, and the outer end of yarn core covers there is the heat preservation, and the outer end of heat preservation covers there is fire-retardant layer, and the outer end of fire-retardant layer covers there is the fluorescent layer, and the outer end of fluorescent layer covers there is the waterproof layer, and the equal fixedly connected with strengthening rib in both ends of yarn core, and the strengthening rib runs through yarn core, heat preservation, fire-retardant layer, fluorescent layer and waterproof layer respectively. The utility model discloses a set up heat preservation, fire-retardant layer and waterproof layer respectively and can strengthen the utility model discloses a thermal insulation performance, fire behaviour and waterproof performance can strengthen through setting up the strengthening rib the utility model discloses a toughness prevents the utility model discloses fracture easily.

CN105856778A provides a retroreflective sunshade fabric, which comprises a fabric formed by warp knitting fiber yarns and having warp yarns and weft yarns, wherein a PVC coating is coated on the surface layer of the fabric to form a base fabric, and a retroreflective material is arranged on the outer surface layer of the base fabric; the base fabric may be formed by warp knitting a fiber yarn, the fiber yarn may be a covered yarn formed by covering a fiber surface with PVC, and the outer surface layer of the base fabric may be provided with a retroreflective material. The retroreflective material is a reflective film and is adhered to the surface of the fabric through glue; or the reflective coating is coated on the surface of the fabric. When the sun shines on the retroreflective material of the fabric in summer, light is reflected reversely, and the reflected light points to a solar light source, so that light pollution is avoided. The invention has simple structure, low cost, durability and obvious energy-saving effect.

At present, the traditional PVC polyester covered yarn solves the basic problems of low strength, poor heat insulation, ultraviolet resistance, fire resistance and the like on the basis of the traditional sun-shading function. The fabric has the functions of preventing bacteria from propagating, preventing the fabric from mildewing, keeping the size constant and not deformed, keeping the flatness of the fabric for a long time and being easy to clean, but still has some problems. Secondly, the polyester coated yarns are used as warp yarns and weft yarns of the fabric, the traditional silk yarns are hard and are very inconvenient to manufacture, the PVC layer required to be coated on the over-soft fabric is thin, the performances in the aspects of sun shading, flame retardance, heat insulation and the like are poor, the finally manufactured sun-shading fabric is poor in stiffness, and the formability of the finally manufactured sun-shading product is unsatisfactory; and the function of the existing sunshade fabric for adjusting the indoor temperature is basically used in summer, so that good heat insulation performance is obtained, the utilization rate of an indoor air conditioner is greatly reduced, and energy is saved. In winter, under cold weather conditions, the sun-shading fabric is not used in order to obtain the illumination temperature and increase the indoor temperature due to low illumination intensity. Therefore, the existing sunshade fabric is used in hot summer with high illumination intensity, and the sunshade fabric cannot play the function in cold winter or in regions with relatively low illumination intensity, so that whether the sunshade fabric can be used for improving the indoor temperature in winter or in regions with low illumination intensity or not can be developed, the energy is saved, and the problem of restricting the development of the field of sunshade materials is solved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to solve the technical problem of providing the functional PVC polyester coated yarn for the sun-shading fabric, which has the advantages of simple proportion, soft texture and controllable fineness, can effectively utilize illumination to improve the indoor temperature under the condition of low illumination intensity, and simultaneously ensures that the fabric keeps the flatness for a long time, and the preparation method thereof.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the functional PVC polyester coated yarn for the sun-shading fabric comprises a core yarn consisting of polyester filament yarns, wherein a coating layer is coated outside the core yarn through a coating process, the diameter of the PVC polyester coated yarn is 0.3-0.8 mm, and the coating layer is prepared from the following raw materials in parts by weight:

40-80 parts of polyvinyl chloride;

2-5 parts of far infrared emission particles;

1-3 parts of a heat stabilizer;

20-30 parts of a plasticizer;

3-8 parts of an antioxidant;

6-10 parts of calcium carbonate filler.

The functional PVC polyester coated yarn for the sun-shading fabric is characterized in that the coating layer is prepared from the following raw materials in parts by weight: 55 parts of polyvinyl chloride, 4 parts of far infrared emission particles, 2 parts of a heat stabilizer, 25 parts of a plasticizer, 5 parts of an antioxidant and 8 parts of a calcium carbonate filler.

According to the functional PVC polyester coated yarn for the sun-shading fabric, the far infrared emission particles are tourmaline, and the particle size of the tourmaline is 4-8 mu m.

The functional PVC polyester coated yarn for the sun-shading fabric has different particle sizes.

The functional PVC polyester coated yarn for the sun-shading fabric is prepared from polyvinyl chloride, a calcium-zinc stabilizer, a plasticizer, an antioxidant, namely, tetrapentaerythritol tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and a plasticizer, wherein the polyvinyl chloride is a low-molecular-weight PVC mixture with the molecular weight of 1000 or less than 1000.

The functional PVC polyester coated yarn for the sun-shading fabric is characterized in that the thickness of the coating layer is 5-10 mu m.

The functional PVC polyester coated yarn for the sun-shading fabric is characterized in that the core yarn is a polyester filament bundle structure consisting of a plurality of polyester filaments.

A method for preparing PVC polyester coated yarn comprises the following steps:

(1) and preparing functional PVC master batch:

a. weighing the following raw materials in parts by mass

40-80 parts of polyvinyl chloride, 2-5 parts of far infrared emission particles, 1-3 parts of a heat stabilizer, 20-30 parts of a plasticizer, 3-8 parts of an antioxidant and 6-10 parts of a calcium carbonate filler;

b. mixing all the components and then putting the mixture into a high-speed mixer for high-speed mixing;

c. stirring and cooling, transferring to a charging hopper, and feeding the charging hopper into a double-screw host through a conveying device;

d. cutting into particles by a granulator to form functional PVC master batches;

(2) and preparing the PVC polyester coated yarn:

a. forming polyester filament bundles by a plurality of polyester filaments, putting the polyester filament bundles into a filament frame, and penetrating the polyester filament bundles into a mold through a tension positioning device;

b. adding the functional PVC master batch into a hopper, heating, plasticizing and melting the functional PVC master batch by a screw extruder, and then sending the functional PVC master batch into a mold;

c. the polyester filament bundle is driven by a traction disc to pass through a die head for coating;

d. and cooling the coated PVC polyester coated yarn by circulating cooling water, and then, winding the coated PVC polyester coated yarn after entering an automatic wire diameter detector.

According to the preparation method of the functional PVC polyester fiber coated yarn for the sun-shading fabric, the tension applied to the polyester filament bundle in the coating process is 0.05 kG.

The functional PVC polyester coated yarn for the sun-shading fabric and the preparation method thereof have the advantages that: the invention abandons the means that the traditional sun-shading fabric realizes active resistance and ultraviolet reflection to realize sun shading and temperature reduction by adding ultraviolet-resistant components, takes the main inventive concept of effectively utilizing ultraviolet rays and converting the ultraviolet rays into invisible far infrared rays, and adds far infrared emission particle tourmaline into PVC master batches to ensure that a large number of tourmaline particles are distributed in the coating layer and are distributed in the circumferential direction of the polyester filament bundles. The sun ray contains ultraviolet ray and infrared ray, and when light shined on the cladding silk, tourmaline particle can absorb ultraviolet ray and convert invisible far infrared ray into the heat and outwards launches through the cladding, can obtain the reinforcing of infrared ray from this, has improved ambient temperature. The coating layer of the invention endows the polyester filament yarn with excellent far infrared emission function. The invention breaks through the single function that the traditional sun-shading material can only be used in a hot environment to realize cooling, can also be used in a cold environment and is used for increasing the environmental temperature, belongs to the initiative in the field of sun-shading materials, can be widely used in the fields of indoor curtains, sun-shading fabrics, outdoor tents and the like, and has good market popularization value.

Drawings

FIG. 1 is a schematic cross-sectional structure view of the PVC polyester covered yarn of the present invention;

FIG. 2 is a schematic diagram of an electron microscope photograph of a PVC polyester coated yarn;

FIG. 3 is a schematic diagram of a cross-sectional electron microscope photograph of a PVC polyester coated yarn;

FIG. 4 is a distribution histogram of tensile properties before and after coating with polyester filaments;

fig. 5 is a schematic cross-sectional structure view of the PVC polyester covered yarn ofembodiment 2 of the present invention.

Detailed Description

The invention is further explained in detail with reference to the drawings and the specific embodiments;

example 1:

as shown in fig. 1, 2 and 3, a PVC polyester covered yarn with far infrared emission function includes a core yarn 1 composed of polyester filaments, the core yarn 1 is a polyester filament bundle structure composed of a plurality ofpolyester filaments 2. The core wire 1 is coated with a coating layer 3 on the outside thereof through a coating process, and the coating layer 3 has a thickness of 10 μm. The diameter of the PVC polyester fiber coated yarn is 0.3 mm. In the actual preparation process, the color of the coating filament can be adjusted by adding pigment when preparing the functional PVC master batch, and can also be adjusted by adding pigment when melting the functional PVC master batch by a double-screw extruder.

The coating layer 3 is prepared from the following raw materials, by weight, 40 parts of polyvinyl chloride, 2 parts of far infrared emitting particles, 1 part of a heat stabilizer, 20 parts of a plasticizer, 3 parts of an antioxidant, 6 parts of calcium carbonate filler, wherein the polyvinyl chloride is a low molecular weight PVC mixture with the molecular weight of 1000 or less, the heat stabilizer is a calcium-zinc stabilizer, the plasticizer is dioctyl terephthalate or epoxidized soybean oil, the antioxidant is tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the far infrared emitting particles aretourmaline 4, and the particle size of thetourmaline 4 is 4 micrometers.

As shown in fig. 4, which is a histogram of breaking strength and breaking elongation of the PVC polyester coated yarn and the polyester filament yarn, it can be seen that the breaking strength of the PVC polyester coated yarn formed by coating the polyester filament yarn with the coating layer is significantly increased, and the service life is prolonged.

Traditional solar protection materials have certain stiffness and formability in order to ensure that the materials themselves have certain rigidity and formability, and a certain linear diameter proportion is needed between polyester filaments and a coating layer, the polyester filaments with relatively large linear diameter need to be selected, so that the thickness of the coating layer coated outside cannot be too large, the polyester filaments with small linear diameter need to be coated with the coating layer with large thickness, higher requirements are brought to production, the cost is higher, and the difficulty in subsequent weaving of the solar protection materials due to overlarge hardness is caused. The core yarn 1 of the PVC polyester coated yarn is a polyester filament bundle structure consisting of a plurality ofpolyester filaments 2, the structure has a plurality of advantages by combining with the addedtourmaline 4, firstly, a single polyester filament is changed into a plurality of polyester filament bundles, and under the condition that the required wire diameter specification of the PVC polyester coated yarn is not changed, compared with the traditional single polyester filament, the coated yarn formed by coating is softer in texture, can provide a larger thickness space for the coating layer 3, and is relatively smaller in hardness. Secondly, the thickness of the coating layer 3 is increased, which is equivalent to addingmore tourmaline 4 particles, thereby greatly increasing the far infrared emission performance, improving the heat conversion efficiency, and having obvious energy-saving effect and no light pollution through the 'conversion' principle.

The method for preparing the PVC polyester coated yarn comprises the following steps:

(1) and preparing functional PVC master batch:

a. weighing the following raw materials in parts by mass

40-80 parts of polyvinyl chloride, 2-5 parts of far infrared emission particles, 1-3 parts of a heat stabilizer, 20-30 parts of a plasticizer, 3-8 parts of an antioxidant and 6-10 parts of a calcium carbonate filler;

b. mixing all the components and then putting the mixture into a high-speed mixer for high-speed mixing;

c. stirring and cooling, transferring to a charging hopper, and feeding the charging hopper into a double-screw host through a conveying device;

d. cutting into particles by a granulator to form functional PVC master batches;

(2) and preparing the PVC polyester coated yarn:

a. forming polyester filament bundles by a plurality ofpolyester filaments 2, putting the polyester filament bundles into a filament frame, and penetrating the polyester filament bundles into a mold through a tension positioning device;

b. adding the functional PVC master batch into a hopper, heating, plasticizing and melting the functional PVC master batch by a screw extruder, and then sending the functional PVC master batch into a mold;

c. the polyester filament bundle is driven by a traction disc to pass through a die head for coating;

d. and cooling the coated PVC polyester coated yarn by circulating cooling water, and then, winding the coated PVC polyester coated yarn after entering an automatic wire diameter detector.

In the coating process, in order to control the relatively uniform and rapid coating of the functional PVC master batch in the molten state on the circumferential surface of the polyester filament bundle, in the step (2) a, the tension applied to the polyester filament bundle is 0.05 kG.

Example 2:

the same parts of this example as those of example 1 are not described again, except that the coating layer is prepared from the following raw materials in parts by weight: 55 parts of polyvinyl chloride, 4 parts of far infrared emission particles, 2 parts of a heat stabilizer, 25 parts of a plasticizer, 5 parts of an antioxidant and 8 parts of a calcium carbonate filler. The thickness of the coating layer 3 was 8 μm. The diameter of the PVC polyester fiber coated yarn is 0.5 mm. The far infrared emission particles aretourmaline 4, and the particle diameter of thetourmaline 4 is 6 μm.

As shown in fig. 1 and 5, more gaps 5 can be formed betweenadjacent polyester filaments 2 when viewed from the outside, and the surface area is greatly increased compared to that of a single polyester filament. Because the state that the functional PVC master batch is sent into the mould after being heated, plasticized and melted by the screw extruder is changed into molten state, the functional PVC master batch has higher viscosity, when the functional PVC master batch is coated on the surface of the polyester filament bundle, the functional PVC master batch liquid can be partially filled into the gap 5, the surface of the functional PVC master batch liquid is larger than the surface of the polyester filament bundle and is firmer, and the coating layer 3 is not easy to strip.

Example 3:

the same parts of this embodiment as those of embodiment 1 are not described again, except that the coating layer 3 is prepared from the following raw materials in parts by weight: 80 parts of polyvinyl chloride, 5 parts of far infrared emission particles, 3 parts of heat stabilizer, 30 parts of plasticizer, 8 parts of antioxidant and 10 parts of calcium carbonate filler. The thickness of the coating layer 3 was 5 μm. The diameter of the PVC polyester fiber coated yarn is 0.8 mm. The far infrared emission particles aretourmaline 4, and the particle diameter of thetourmaline 4 is 8 μm.

Example 4:

the same parts of this embodiment as those of embodiment 1 are not described again, but the far infrared emitting particles aretourmaline 4 with different particle sizes, that is, the particle size oftourmaline 4 is selected irregularly within the range of 4-8 μm. Thetourmaline 4 combination that different particle sizes were mixed can balance the heat conversion efficiency of coating 3 inside for the heat of coating 3 inside is invariable, the thermal even of effective control sunshade fabric unit area is dispersed.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.

Claims (9)

1. The utility model provides a functional PVC dacron cladding silk for sunshade fabric, includes a core silk of constituteing by dacron long filament, has the coating through the coating technology coating in the core silk outside, its characterized in that: the wire diameter of the PVC polyester coated yarn is 0.3-0.8 mm, and the coating layer is prepared from the following raw materials in parts by weight:

40-80 parts of polyvinyl chloride;

2-5 parts of far infrared emission particles;

1-3 parts of a heat stabilizer;

20-30 parts of a plasticizer;

3-8 parts of an antioxidant;

6-10 parts of calcium carbonate filler.

2. The functional PVC polyester coated yarn for the sun-shading fabric according to claim 1, wherein the coating layer is prepared from the following raw materials in parts by weight: 55 parts of polyvinyl chloride, 4 parts of far infrared emission particles, 2 parts of a heat stabilizer, 25 parts of a plasticizer, 5 parts of an antioxidant and 8 parts of a calcium carbonate filler.

3. The functional PVC polyester covered yarn for the sun-shading fabric according to claim 1 or 2, which is characterized in that: the far infrared emission particles are tourmaline, and the particle size of the tourmaline is 4-8 mu m.

4. The functional PVC polyester covered yarn for the sun-shading fabric according to claim 3, which is characterized in that: the particle sizes of the tourmaline are different.

5. The functional PVC polyester covered yarn for the sun-shading fabric according to claim 1, wherein the PVC is a low molecular weight PVC mixture with the molecular weight of 1000 or less, the heat stabilizer is a calcium-zinc stabilizer, the plasticizer is dioctyl terephthalate or epoxidized soybean oil, and the antioxidant is pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].

6. The functional PVC polyester covered yarn for the sun-shading fabric according to claim 1, which is characterized in that: the thickness of the coating layer is 5-10 mu m.

7. The functional PVC polyester covered yarn for the sun-shading fabric according to claim 1, which is characterized in that: the core yarn is a polyester filament bundle structure consisting of a plurality of polyester filaments.

8. A method for preparing the PVC polyester covered yarn as claimed in any one of claims 1 to 8, which comprises the following steps:

(1) and preparing functional PVC master batch:

a. weighing the following raw materials in parts by mass

40-80 parts of polyvinyl chloride, 2-5 parts of far infrared emission particles, 1-3 parts of a heat stabilizer, 20-30 parts of a plasticizer, 3-8 parts of an antioxidant and 6-10 parts of a calcium carbonate filler;

b. mixing all the components and then putting the mixture into a high-speed mixer for high-speed mixing;

c. stirring and cooling, transferring to a charging hopper, and feeding the charging hopper into a double-screw host through a conveying device;

d. cutting into particles by a granulator to form functional PVC master batches;

(2) and preparing the PVC polyester coated yarn:

a. forming polyester filament bundles by a plurality of polyester filaments, putting the polyester filament bundles into a filament frame, and penetrating the polyester filament bundles into a mold through a tension positioning device;

b. adding the functional PVC master batch into a hopper, heating, plasticizing and melting the functional PVC master batch by a screw extruder, and then sending the functional PVC master batch into a mold;

c. the polyester filament bundle is driven by a traction disc to pass through a die head for coating;

d. and cooling the coated PVC polyester coated yarn by circulating cooling water, and then, winding the coated PVC polyester coated yarn after entering an automatic wire diameter detector.

9. The preparation method of the functional PVC polyester covered yarn for the sun-shading fabric according to claim 6, which is characterized by comprising the following steps: the tension applied to the polyester filament bundle in the coating process is 0.05 kG.

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