技术领域technical field
本发明涉及一种烟草制品及其加工工艺，特别涉及用干法造纸法技术生产制造再造烟叶的基片的技术和方法。The invention relates to a tobacco product and its processing technology, in particular to the technology and method for manufacturing the base sheet of reconstituted tobacco leaves by dry-laid papermaking technology.
背景技术Background technique
再造烟叶又称重组烟叶、均质烟叶。主要由烟末碎片、烟梗或低次烟叶，外加植物纤维、胶粘剂和其它添加剂组成。再造烟叶作为烟制品原料现已广泛用作卷烟制品。利用烟草低次原料制成薄片具有成本低、填充性好，并能减少烟气中焦油含量等特点，制造始于20世纪50年代。制造方法主要有造纸法、稠浆法和辊压法三种方法，因稠浆法、辊压法工艺相对落后以及产品质量方面的诸多原因，已基本上没有被广泛使用而逐渐被淘汰，现在基本上广泛使用造纸法技术生产再造烟叶基片。Reconstituted tobacco is also called reconstituted tobacco or homogeneous tobacco. It is mainly composed of tobacco powder fragments, tobacco stems or low-grade tobacco leaves, plus plant fibers, adhesives and other additives. Reconstituted tobacco leaves have been widely used as cigarette products as raw materials for tobacco products. Sheets made of low-grade tobacco raw materials have the characteristics of low cost, good filling performance, and can reduce the tar content in smoke. The manufacture began in the 1950s. The manufacturing methods mainly include three methods: papermaking method, thick stock method and roller pressing method. Due to the relatively backward technology of thick stock method and roller pressing method and many reasons in terms of product quality, they have basically not been widely used and have been gradually eliminated. Now Basically, papermaking techniques are widely used to produce reconstituted tobacco leaf substrates.
造纸法，确切讲是传统造纸法，是将烟粉烟末、烟梗或废次烟草原料先用水萃取烟草提取物，萃取后水不溶物质添加/或不添加天然纤维制成浆料后进入造纸机，初步形成纸网，烘干后为再造烟叶的基片（水溶性萃取物经浓缩后和其他添加剂一并再后续工序中涂布到基片）。该法生产的薄片，物理强度高，湿强尚好，单位体积重量轻，燃烧速度较快，生成焦油低。由于工艺复杂，能耗高，设备投资大，适合大规模生产。The papermaking method, to be precise, is the traditional papermaking method. The tobacco powder, tobacco stems or waste tobacco raw materials are first extracted with water to extract the tobacco extract. machine to initially form a paper web, and after drying, it becomes the substrate of reconstituted tobacco leaves (the water-soluble extract is concentrated and coated on the substrate in the subsequent process along with other additives). The flakes produced by this method have high physical strength, good wet strength, light weight per unit volume, fast burning speed and low tar formation. Due to the complex process, high energy consumption and large equipment investment, it is suitable for large-scale production.
国内外通过二三十年的研究和使用，此技术得到了充分的发展与提高，并被广泛用到卷烟生产上。但也存在几个方面的缺陷：一是采用传统的造纸技术，生产中产生大量污水，属于污染严重的生产技术，污水处理和排放压力很大；二是烟草物质在加工过程中烟味和烟香损失明显，其所用的烟末和烟草碎片需要通过在水中浸提，其中的水溶性烟草组分在浓缩过程中有明显损失，而不溶性的烟草物质在随后的磨浆过程中损失也非常明显，其结果是生产出的烟草薄片的烟味烟香不足，非烟草吃味和杂气突出，影响吸食品质；三是该法生产的纸基结构板结，表面光滑，负载能力不足，目前传统造纸法烟草薄片的涂布率（添加的烟草提取物等烟草物质占成品的质量百分比）一般为40%左右，添加的烟草物质少纸基的含量高必然导致烟草薄片的吸食品质缺陷；四是传统造纸法制造的纸基的结构力由纤维之间的氢键提供，虽然结构强度好但湿强很差，纸基的抗拉伸能力较弱，限制了后续的涂布加工过程中的速度，容易断纸而中断生产，抗拉伸缺陷和湿强缺陷不仅影响产能而且造成生产工艺不稳定。针对湿法造纸法再造烟叶基片存在的问题，尤其在国内为满足卷烟减害降焦的需求烟草薄片使用越来越受到重视的大背景下，都在探索新的造纸法烟草薄片基片制造技术。Through 20 or 30 years of research and use at home and abroad, this technology has been fully developed and improved, and has been widely used in cigarette production. However, there are also several defects: one is the use of traditional papermaking technology, which produces a large amount of sewage during production, which is a production technology with serious pollution, and the pressure on sewage treatment and discharge is very high; The aroma loss is obvious, and the tobacco powder and tobacco fragments used need to be extracted in water. The water-soluble tobacco components in it are obviously lost during the concentration process, and the insoluble tobacco substances are also very obvious during the subsequent refining process. , the result is that the tobacco flakes produced have insufficient smoke flavor and aroma, prominent non-tobacco taste and miscellaneous gas, which affect the quality of smoking; third, the paper base structure produced by this method is hardened, the surface is smooth, and the load capacity is insufficient. The coating rate of the tobacco sheet (the added tobacco extract and other tobacco substances account for the mass percentage of the finished product) is generally about 40%, and the low content of the added tobacco substance and the high content of the paper base will inevitably lead to smoking quality defects of the tobacco sheet; the fourth is the traditional The structural force of the paper base manufactured by the papermaking method is provided by the hydrogen bonds between fibers. Although the structural strength is good, the wet strength is poor, and the tensile resistance of the paper base is weak, which limits the speed of the subsequent coating process. It is easy to break the paper and interrupt the production, and the tensile defects and wet strength defects not only affect the production capacity but also cause the production process to be unstable. Aiming at the problems existing in the wet-process papermaking reconstituted tobacco leaf substrate, especially under the background that the use of tobacco sheet is getting more and more attention in order to meet the demand of cigarette harm reduction and tar reduction in China, we are exploring new papermaking tobacco sheet substrate manufacturing technology.
在寻找解决上述一些问题中，专利ZL00808488.2，提出了类似制造无纺布的制造薄片的方法。先用植物纤维织成布状的担持层，在担持层上添加烟草粉末。因为植物纤维及烟草粉末不具有粘结性，必须在添加烟草粉末时同时加上粉末状的粘合剂，加湿后加热加压，使之成为一体。也有设计在添加烟草粉末后再加一个由植物纤维组成的无纺布层作为罩层，这样制成一种两层纤维层夹心一层烟粉烟末的薄片结构。这种薄片的成型过程中需要加湿后加热加压，使植物纤维与烟粉烟末粘接成薄层结构。该设计存在明显的缺陷，主要表现为：结构板实，其密度较大，约为0.73g/cm3，填充值不大，与现有的湿法造纸法薄片相比，没有明显优势；粘接强度小，其添加的胶是混合到烟粉烟末中，烟粉烟末与植物纤维层之间的粘接力很弱，表现为薄片强度有缺陷；烟粉烟末基本上是一个连续层，胶合后韧性不够，薄片分切过程中容易掉粉，在实际生产中有用价值受到严重局限；此外粘合剂使用量大，一定程度上也影响了卷烟吸味。跟传统的造纸法再造烟叶相比，其优势并不明显，甚至因其工艺复杂以及容易掉粉等设计缺陷，其实际使用价值远低于传统造纸法再造烟叶。In seeking to solve some of the above-mentioned problems, patent ZL00808488.2 proposes a method for manufacturing sheets similar to non-woven fabrics. Firstly, plant fibers are used to weave a cloth-like supporting layer, and tobacco powder is added on the supporting layer. Because plant fibers and tobacco powder do not have cohesiveness, it is necessary to add a powdery binder when adding tobacco powder, heat and press after humidification to make it integrated. There is also a design to add a non-woven fabric layer composed of plant fibers as a cover layer after adding tobacco powder, so that a thin sheet structure with a layer of smoke powder sandwiched between two layers of fiber layers is made. During the forming process of this thin sheet, it needs to be humidified and then heated and pressurized, so that the plant fiber and smoke powder are bonded into a thin layer structure. There are obvious defects in this design, mainly as follows: the structure is solid, its density is relatively high, about 0.73g/cm3 , the filling value is not large, and there is no obvious advantage compared with the existing wet papermaking method; The bonding strength is small, and the glue added is mixed into the smoke powder, and the bonding force between the smoke powder and the plant fiber layer is very weak, which shows that the strength of the sheet is defective; the smoke powder is basically a continuous After gluing, the toughness is not enough, and the powder is easy to fall off during the cutting process of the thin slices, which seriously limits the useful value in actual production; in addition, the large amount of adhesive used also affects the smoking taste of cigarettes to a certain extent. Compared with traditional papermaking method reconstituted tobacco leaves, its advantages are not obvious, and even because of design defects such as complex process and easy powder loss, its actual use value is far lower than traditional papermaking method reconstituted tobacco leaves.
专利200810030146.5也提出了一种干式造纸法制造烟草薄片的技术方案，其实是一种湿法造纸法技术和稠浆法技术相结合的综合技术。具体做法把废次烟草原料，即烟梗、烟末等用水萃取，萃取液浓缩后留用，再把萃取渣和外加木浆纤维磨浆得到混合浆料，这部分工艺完全同传统的湿法造纸法工艺；然后将浆料烘干制成80-200目左右的干浆粉，采用风送至成型部位对辊处，经过挤压形成粉末薄层，再在形成的薄层上喷洒微量的粘合剂，再将浓缩的萃取液均匀地涂布在基片上，烘至设定的干度，成为再造烟叶的成品。这部分工艺同稠浆法的工艺。此方法通过磨浆而得的浆粉目数在80—200目之间，据此推断其气流成网的成型网孔必须小于200目，其透气度势必造成成型的困难。因为细小的粉末状，气流成网后堆积在成型网上，粉末间的间隙较小，比较密实，加上喷涂胶液和萃取液会进一步增加基片的密实度，其蓬松度和单位体积重量虽没有提及，但相比湿法造纸法在填充量上没有很大的优势，因为没有很好的蓬松度不会有很好的填充能力。另因为80—200目的粉末，纤维较短全靠少量的粘合剂和萃取液粘结，该薄片的强度，尤其是湿强存在严重问题。正因为该方法在成型设计上存在的重大缺陷，严重局限了使用该方法生产出合格的再造烟叶。Patent 200810030146.5 also proposes a technical solution for manufacturing tobacco sheet by dry papermaking method, which is actually a comprehensive technology combining wet papermaking technology and thick pulp technology. The specific method is to extract the waste tobacco raw materials, that is, tobacco stems, tobacco powder, etc., with water, concentrate the extract and keep it for use, and then refine the extraction residue and additional wood pulp fibers to obtain a mixed pulp. This part of the process is completely the same as the traditional wet papermaking. Then the slurry is dried to make a dry slurry powder of about 80-200 mesh, which is sent to the roller of the forming part by wind, and a thin layer of powder is formed after extrusion, and then a small amount of sticky powder is sprayed on the formed thin layer. mixture, and then the concentrated extract is evenly coated on the substrate, and dried to a set dryness to become the finished product of reconstituted tobacco leaves. This part of the process is the same as that of the thick slurry method. The mesh size of pulp powder obtained by refining in this method is between 80 and 200 mesh, and it is inferred that the air-laid forming mesh must be less than 200 mesh, and its air permeability will inevitably cause difficulty in forming. Because of the fine powder, it is piled up on the forming net after air-forming, and the gap between the powders is small and relatively dense. In addition, spraying glue and extract will further increase the compactness of the substrate. Although its bulkiness and unit volume weight Not mentioned, but there is no great advantage in filling capacity compared to wet papermaking, because without good bulk, there will be no good filling ability. In addition, due to the 80-200 mesh powder, the short fibers are all bonded by a small amount of binder and extract, and the strength of the sheet, especially the wet strength, has serious problems. Just because of the major defects in the molding design of this method, it has seriously limited the use of this method to produce qualified reconstituted tobacco leaves.
目前传统造纸法技术制造再造烟叶基片或类似专利200810030146.5和专利ZL00808488.2提及的再造烟叶的基片均仍存在基片湿强缺陷，后续的加工工艺性能差，填充能力不足，负载的烟草物质的潜力小，以及吸食品质缺陷，限制了烟草薄片在卷烟中的使用。At present, the base sheet of reconstituted tobacco leaf manufactured by traditional papermaking technology or the base sheet of reconstituted tobacco leaf mentioned in patent 200810030146.5 and patent ZL00808488.2 still has the defect of base sheet wet strength, the subsequent processing technology performance is poor, the filling capacity is insufficient, and the loaded tobacco The low potential of the substance, as well as the smoking quality defects, limit the use of tobacco sheet in cigarettes.
发明内容Contents of the invention
针对上述现有技术中存在的问题，发明人首次尝试采用干法造纸技术来生产再造烟叶基片。但发明人发现：采用干法造纸法用于再造烟叶生产过程需要克服制备过程中产生的大量静电；另外，本发明的再造烟叶基片不再像湿法造纸制备再造烟叶是靠氢健进行结合，不太需要多少粘结剂（大部分的湿法造纸是根本不添加胶粘剂），而本发明方法尝试采用干法造纸技术制造基片，为使基片有效结合，设计在基片表面喷加胶粘剂，但烟草行业对胶粘剂的选择有很高要求，不仅有添加安全性的要求，而且要求添加的胶粘剂不能明显影响吸味品质。此外，如何在使用大量的胶粘剂加入的情况下，还需要进一步满足基片干强的要求以及更重要的湿强和抗拉伸能力的要求，使基片不仅有很好的结构强度，而且在后续的加工过程中在吸收了数倍于基片自身质量的溶液后还能有一定的湿强和抗拉伸能力。较好的湿强和抗拉伸能力是目前再造烟叶基片制备面临的一大难题。本发明所制得的再造烟叶基片发明人经过多年反复的研发，成功的克服上述技术难题，并首次成功的采用干法造纸法生产制备得到具有较高湿强、较强抗拉伸能力、高负载能力、高填充值、良好加工性能的再造烟叶基片。Aiming at the problems existing in the above-mentioned prior art, the inventor first tried to use the dry-laid papermaking technology to produce the reconstituted tobacco leaf substrate. However, the inventors have found that the dry papermaking method used in the production process of reconstituted tobacco leaves needs to overcome a large amount of static electricity generated during the preparation process; in addition, the reconstituted tobacco leaf base sheet of the present invention is no longer combined with hydrogen bonds like wet papermaking to prepare reconstituted tobacco leaves , does not need much adhesive (most of the wet papermaking does not add adhesive at all), and the method of the present invention attempts to use dry papermaking technology to manufacture the substrate. In order to effectively combine the substrate, it is designed to spray on the surface of the substrate Adhesives, but the tobacco industry has very high requirements for the selection of adhesives, not only for the safety of adding, but also for the added adhesives not to significantly affect the quality of smoking. In addition, in the case of using a large amount of adhesive, it is necessary to further meet the requirements of dry strength of the substrate and the more important requirements of wet strength and tensile strength, so that the substrate not only has good structural strength, but also In the subsequent processing process, after absorbing the solution several times the mass of the substrate itself, it can still have a certain wet strength and tensile strength. Better wet strength and tensile strength are currently a major problem in the preparation of reconstituted tobacco leaf substrates. The inventor of the reconstituted tobacco leaf base sheet prepared by the present invention successfully overcomes the above-mentioned technical difficulties after many years of repeated research and development, and for the first time successfully adopts the dry papermaking method to produce and prepare the reconstituted tobacco leaf base sheet with high wet strength, strong tensile resistance, Reconstituted tobacco leaf base sheet with high load capacity, high filling value and good processability.
本发明的技术方案是：采用包括烟梗、植物纤维在内的原料经粉碎解纤成短纤维后风送入成形头箱打散后，通过成形网下的真空抽气装置的抽真空作用使得打散后物料的均匀的铺设吸附在干法造纸的成形网上形成纤维薄层；向纤维薄层喷加胶粘剂，采用的是喷雾喷加及喷涂背面真空抽吸的相结合的方式；最后经烘干得到具有立体网络结构的再造烟叶的基片；在成形网上部与成形头箱之间和/或成形网与真空箱开口之间铺设有抗静电绳，和/或在成形网与真空箱开口之间设有抗静电网；所述的胶粘剂包括壳聚糖与淀粉类胶粘剂和/或纤维素衍生物和/或以及其他具有良好粘接性能的天然植物多聚糖（如，半乳甘露聚糖、葡甘露聚糖、阿拉伯胶等）等。所述胶粘剂组分中壳聚糖是必需组分，其他的组分可以按需要选择其中的一种或几种与壳聚糖配合使用，其中壳聚糖的添加量不低于所述基片总质量的2%，淀粉类胶粘剂和/或纤维素衍生物等其他的胶粘剂组分的总添加量不低于所述基片总质量的0.5%；所述的胶粘剂的总添加量为所述的基片总质量的2.5-10%。The technical solution of the present invention is: adopt the raw material including tobacco stem and plant fiber to be crushed and defibrated into short fibers, and then sent to the forming head box by wind to disperse, and then the vacuum pumping effect of the vacuum suction device under the forming net makes the After being dispersed, the material is evenly laid and adsorbed on the forming wire of dry-laid papermaking to form a thin fiber layer; the adhesive is sprayed on the thin fiber layer, using a combination of spray spraying and vacuum suction on the back of the spraying; finally, after drying Dried to obtain the base sheet of reconstituted tobacco leaves with a three-dimensional network structure; antistatic ropes are laid between the upper part of the forming net and the forming head box and/or between the forming net and the opening of the vacuum box, and/or between the forming net and the opening of the vacuum box An antistatic net is provided between them; the adhesive includes chitosan and starch adhesives and/or cellulose derivatives and/or other natural plant polysaccharides (such as galactomannan) with good adhesive properties sugar, glucomannan, gum arabic, etc.), etc. Chitosan is an essential component in the adhesive component, and one or more of the other components can be selected to be used in conjunction with chitosan as required, wherein the amount of chitosan added is not lower than that of the substrate 2% of the total mass, the total addition of other adhesive components such as starch adhesives and/or cellulose derivatives is not less than 0.5% of the total mass of the substrate; the total addition of the adhesive is the 2.5-10% of the total mass of the substrate.
发明人在实施过程中选用25-40克/平方米左右的基片就可以实现在烟草薄片中添加烟草粉末50-80%，其中在25-28克/平方米的基片的基础上制造烟草薄片,其烟草粉末的添加量可以达到70-75%左右。In the process of implementation, the inventor selects a base sheet of about 25-40 grams/square meter to realize the addition of 50-80% of tobacco powder in the tobacco sheet, wherein the tobacco is produced on the basis of a substrate of 25-28 grams/square meter. For flakes, the amount of tobacco powder added can reach about 70-75%.
本发明所述的淀粉类胶粘剂为天然糯米淀粉、藕粉、糊精、羧甲基淀粉或酶解淀粉中的一种或几种。The starch adhesive in the present invention is one or more of natural glutinous rice starch, lotus root starch, dextrin, carboxymethyl starch or enzymatic starch.
本发明优选的胶粘剂方案为淀粉类胶粘剂用量为烟草粉末质量的6-8%，纤维素衍生物类胶粘剂用量为烟草粉末质量的1-1.5%，其他多聚糖用量为烟草粉末质量的0.2-0.4%。所述的纤维素衍生物为甲基纤维素、羧甲基纤维素中的一种或两种。The preferred adhesive scheme of the present invention is that the amount of starch adhesive is 6-8% of the quality of tobacco powder, the amount of cellulose derivative adhesive is 1-1.5% of the quality of tobacco powder, and the amount of other polysaccharides is 0.2-8% of the quality of tobacco powder. 0.4%. The cellulose derivative is one or both of methyl cellulose and carboxymethyl cellulose.
本发明的胶粘剂还可选用的是具有良好粘接性能的天然植物多聚糖，如，葡甘露聚糖、阿拉伯胶中的一种或两种。The adhesive of the present invention can also be selected from natural plant polysaccharides with good adhesive properties, such as one or both of glucomannan and gum arabic.
发明通过无数次的实验及研究发现胶粘剂的总添加量不应低于2.5%，且特别是壳聚糖的添加量不低于所述基片总质量的2%，才可以使得本发明的基片在形成蓬构的结构的基础上仍具有较高湿强、较强抗拉伸能力。The invention found through numerous experiments and researches that the total amount of adhesive added should not be less than 2.5%, and especially the added amount of chitosan should not be less than 2% of the total mass of the substrate, so that the basic The sheet still has high wet strength and strong tensile resistance on the basis of forming a fluffy structure.
本发明优选的胶粘剂配方是：均为质量百分比；The preferred adhesive formula of the present invention is: all are mass percent;
优选实施方案之一：壳聚糖60-80%；羧甲基淀粉10-20%；糊精5-15%；羧甲基纤维素2-10%。One of the preferred embodiments: chitosan 60-80%; carboxymethyl starch 10-20%; dextrin 5-15%; carboxymethyl cellulose 2-10%.
优选实施方案之二：壳聚糖60-75%；支链淀粉10-25%；糊精5-15%；羧甲基纤维素2-10%；葡苷露聚糖8-20%。The second preferred embodiment: chitosan 60-75%; pullulan 10-25%; dextrin 5-15%; carboxymethyl cellulose 2-10%;
优选实施方案之三：壳聚糖35-60%；酶解淀粉10-25%；环糊精15-15%；羧甲基纤维素2-10%；阿拉伯胶15-25%。The third preferred embodiment: 35-60% chitosan; 10-25% enzymatic starch; 15-15% cyclodextrin; 2-10% carboxymethyl cellulose; 15-25% gum arabic.
本发明优选成形网上部与成形头箱之间铺设有抗静电绳，以及成形网与真空箱开口之间设有抗静电网。所有抗静电绳、网均设有接地装置，从而消除植物纤维气流成网时产生的静电。在纤维薄层上喷涂胶粘剂成型过程中，添加/或不添加烟粉烟末，最后经烘干得再造烟叶的基片。In the present invention, an antistatic rope is preferably laid between the upper part of the forming wire and the forming head box, and an antistatic net is arranged between the forming wire and the opening of the vacuum box. All antistatic ropes and nets are equipped with grounding devices to eliminate static electricity generated when plant fibers are air-laid into the net. During the forming process of spraying the adhesive on the fiber thin layer, adding/or not adding tobacco powder, and finally drying to obtain the base sheet of the reconstituted tobacco leaf.
所述的单根短纤维长度优选为2-10mm。The length of said single short fiber is preferably 2-10mm.
本发明喷涂胶粘剂时，是将含胶粘剂料液充分雾化，均匀喷溅到基片表面，为确保充分分散渗透，同时在喷涂面的背面采用真空抽吸，使胶液和料液充分渗透。When spraying the adhesive in the present invention, the material liquid containing the adhesive is fully atomized and evenly sprayed onto the surface of the substrate. In order to ensure sufficient dispersion and penetration, vacuum suction is used on the back of the sprayed surface at the same time to fully penetrate the glue and material liquid.
在基片中可以选择预添加烟粉烟末，添加烟粉烟末的方式有两种，一种是将碎片状烟末直接在成型前与植物纤维、烟梗纤维直接混合来实现添加，另一种方式是将烟粉烟末粉碎后磨浆，与胶液混合后随复合浆料在喷胶工艺时段喷加到短纤维薄层。You can choose to pre-add tobacco powder and tobacco powder in the substrate. There are two ways to add tobacco powder and tobacco powder. One is to directly mix the fragmented tobacco powder with plant fibers and tobacco stem fibers before molding to achieve the addition. One way is to pulverize the smoke powder and then refine it, mix it with the glue, and then spray it onto the thin layer of short fibers along with the composite slurry during the glue spraying process.
喷涂胶粘剂时应在纤维薄层正反两面喷涂胶粘剂，喷涂过程是利用压缩空气把含胶粘剂料液充分雾化，确保充分分散。喷涂面的背面采用真空抽吸，使胶液和料液充分穿透，避免基片分层，提高基片干湿强度，同时保证均匀性。喷涂时采用抽吸真空度的方式，使胶粘剂均匀的分散穿透。在喷加胶粘剂的阶段，可以将调节基片吸食品质的添加剂与胶液混合然后同时喷加到短纤维薄层。然后将纤维薄层烘干便成干法造法再造烟叶的基片。When spraying the adhesive, the adhesive should be sprayed on the front and back sides of the thin fiber layer. The spraying process is to use compressed air to fully atomize the material containing the adhesive to ensure full dispersion. Vacuum suction is used on the back of the sprayed surface to fully penetrate the glue and material liquid, avoid delamination of the substrate, improve the dry and wet strength of the substrate, and ensure uniformity at the same time. When spraying, the method of suction vacuum is used to make the adhesive disperse and penetrate evenly. In the stage of spraying the adhesive, the additive for adjusting the absorption quality of the substrate can be mixed with the glue and then sprayed onto the short fiber thin layer at the same time. Then the thin layer of fiber is dried to form the base sheet of reconstituted tobacco leaves by dry method.
本发明有益效果突出体现在：本发明相对于现有烟草基片生产技术而言是一种全新的工艺设计，但所取得的效果，却可使得制得的烟草基片在整个制备过程中及制得的产品均的产生质的飞跃。The beneficial effects of the present invention are prominently reflected in that the present invention is a brand-new process design compared with the existing tobacco base sheet production technology, but the obtained effect can make the tobacco base sheet obtained during the whole preparation process and The produced products all produce a qualitative leap.
本发明与湿法造纸法薄片基片相比，本发明是干法造纸法以空气作为媒介，相比湿法造纸法以水作为媒介，不仅节约了大量用水，而且生产过程没有明显的污水排放，不会造成对环境的污染，同时也避免了烟草物质在造纸过程中的损失。Compared with the sheet substrate of the wet papermaking method, the present invention uses air as the medium in the dry papermaking method, and uses water as the medium in the wet papermaking method, which not only saves a lot of water, but also has no obvious sewage discharge in the production process , will not cause pollution to the environment, and also avoids the loss of tobacco substances in the papermaking process.
传统的湿法造纸法薄片没有专门的喷加胶粘剂的工艺，一般不添加或仅在造纸浆料中添加少量的胶粘剂。本发明与之不同，喷涂过程是利用压缩空气把含胶粘剂料液充分雾化，均匀喷溅到基片表面，为确保充分分散渗透，同时在喷涂面的背面采用真空抽吸，使胶液和料液充分穿透，避免基片分层，同时保证喷胶均匀，这样可有效保证基片具有良好的结构强度（包括干强和湿强）和抗拉伸能力。The traditional wet papermaking method does not have a special process for spraying adhesives, and generally does not add or only adds a small amount of adhesives to the papermaking slurry. The present invention is different from it. The spraying process uses compressed air to fully atomize the material liquid containing the adhesive, and evenly sprays it on the surface of the substrate. The material liquid fully penetrates to avoid delamination of the substrate, and at the same time ensures uniform glue spraying, which can effectively ensure that the substrate has good structural strength (including dry strength and wet strength) and tensile strength.
本发明相比传统造纸法薄片基片及现有的干法造纸法薄片基片，最大的有益效果为纸基结构优势明显，因使用了较长的纤维通过气流成网法成型，由于纤维有一定的长度，呈无序的交错叠放状态，形成了立体网络的杂乱结构，再通过喷加胶粘剂固化这种结构（请参见图2），因此表观密度低，单位体积质量一般在0.1-0.05g/cm3，填充值约为传统造纸法薄片的基片2-3倍，一般达到了12-18cm3/g。Compared with the traditional paper-making method sheet substrate and the existing dry-process paper-making method sheet substrate, the present invention has the biggest beneficial effect that the paper-based structure has obvious advantages, because it uses longer fibers to form through the air-laid method, and because the fibers have A certain length, in a disorderly staggered state, forms a disordered structure of a three-dimensional network, and then solidifies this structure by spraying an adhesive (see Figure 2), so the apparent density is low, and the mass per unit volume is generally 0.1- 0.05g/cm3 , the filling value is about 2-3 times that of the base sheet of the traditional papermaking method, generally reaching 12-18cm3 /g.
本发明制造的再造烟叶基片与传统造纸法制造的基片一样具有很好的结构强度，且由于在胶粘剂中使用了壳聚糖，使得基片具有更优良的耐水性能，经立式电脑拉力仪（型号YT-L30）测定，其最高可以达到干强的40%左右。因此具有良好加工性能，在后续成品再造烟叶加工时不易断裂，即使耐受添加自身质量8倍以上的料液，也可以支持成品高速成型。The reconstituted tobacco leaf base sheet produced by the present invention has the same good structural strength as the base sheet produced by the traditional papermaking method, and because chitosan is used in the adhesive, the base sheet has better water resistance, and the base sheet is pulled by a vertical computer. Tester (model YT-L30), the highest can reach about 40% of the dry strength. Therefore, it has good processing performance, and it is not easy to break during the subsequent processing of finished reconstituted tobacco leaves. Even if it can tolerate the addition of more than 8 times its own mass of liquid, it can also support high-speed molding of finished products.
本发明制造的再造烟叶基片相比传统造纸法制造的基片因其立体网络结构的优势，具有优良的抗拉伸能力，用立式电脑拉力仪测定其饱和吸水状态下的伸长率（在未拉断前提下纸基最大的伸长百分比）最大可以达到9.8%，一般在6-10%范围内波动。而传统造纸法再造烟叶基片的饱和吸水状态下其伸长率一般在2%左右，此外其多孔的立体网络也保障了其最多可以容纳添加其自身质量2.5-3倍的粉末，为高品质的再造烟叶制造提供了有利的技术支撑。The reconstituted tobacco leaf base sheet manufactured by the present invention has excellent tensile resistance compared with the base sheet manufactured by the traditional papermaking method because of its three-dimensional network structure, and its elongation under the state of saturated water absorption is measured by a vertical computer tension meter ( The maximum elongation percentage of the paper base without breaking) can reach up to 9.8%, generally fluctuating in the range of 6-10%. However, the elongation of the traditional papermaking method reconstituted tobacco leaf base sheet is generally about 2% under saturated water absorption state. In addition, its porous three-dimensional network also ensures that it can accommodate powder that is 2.5-3 times its own weight at most, which is high-quality The manufacture of reconstituted tobacco leaves provides favorable technical support.
普通的干法造纸法消除静电可以通过直接添加抗静电剂来完成，本发明为消除静电，采用了抗静电绳结合抗静电网的设计，该设计效果好，成本低，安装空间小，无任何污染，还可明显满足卷烟吸食品质的双重要求。Ordinary dry papermaking method can eliminate static electricity by directly adding antistatic agent. In order to eliminate static electricity, the present invention adopts the design of antistatic rope combined with antistatic net. The design effect is good, the cost is low, the installation space is small, and there is no need for any Pollution can also obviously meet the dual requirements of cigarette smoking quality.
由于本发明采用干法造纸法制备再造烟叶基片，通过胶粘剂进行粘结成型，胶粘剂的选择同样也要同时满足卷烟添加剂的安全性和不明显影响产品吸食品质的要求。Since the present invention adopts the dry papermaking method to prepare the reconstituted tobacco leaf base sheet, which is bonded and formed by an adhesive, the selection of the adhesive should also meet the requirements of the safety of cigarette additives and not obviously affecting the smoking quality of the product.
附图说明Description of drawings
图1：本发明的优选实施方式中抗静电绳与抗静电网的安装示意图。Figure 1: A schematic diagram of the installation of antistatic ropes and antistatic nets in a preferred embodiment of the present invention.
1-成型头箱，2-成形网，3-抗静电绳，4-真空箱，5-抗静电网。1-forming head box, 2-forming net, 3-antistatic rope, 4-vacuum box, 5-antistatic net.
图2为本发明制备得到的基片的扫描电镜图。Fig. 2 is a scanning electron micrograph of the substrate prepared in the present invention.
图3为由本发明的基片所制得的再造烟叶成品的扫描电镜图；Fig. 3 is the scanning electron micrograph of the reconstituted tobacco leaf finished product that is made by the substrate of the present invention;
具体实施方式detailed description
以下实施例旨在说明而不是本发明的进一步限定。The following examples are intended to illustrate rather than to further limit the invention.
实施例1Example 1
把木浆桨板经粉碎解纤成短纤维后，储存于储料罐，单根纤维长度为2-8mm，计量风送至成形头箱1，通过抗静电绳3和/或抗静电网5去除静电作用的同时，由真空箱4产生的负压作用，经气流成网方法使纤维在成形网2上形成蓬松无序错叠的短纤薄层，再喷涂胶液到基片表面，喷涂时利用压缩空气把含胶粘剂料液充分雾化，喷涂到基片表面，同时在喷涂面的背面负压抽吸，胶粘剂的喷加量占干薄片基片质量的2%（胶粘剂质量配比为：壳聚糖70%，羧甲基淀粉15%，环糊精10%，羧甲基纤维素5%，），喷涂了胶液的基片输送到烘箱烘干，然后对另一面采用前述同样的工艺进行喷加胶液，胶粘剂的喷加量占干薄片基片重量的2%，再输送烘箱烘干，上述烘箱烘干均采用热风穿透快速烘干，两面的分别喷加使得胶粘剂占干薄片基片重量的4%；制得的薄片基片克重在30g/m2，相应的厚度约为0.3mm，用立式电脑拉力仪测定其干强为3.46N，饱和吸水状态下的强度为1.57N，伸长率为9.8%，该基片的载粉能力可以达到其自身质量的3-3.5倍。将薄片基片的水分含量控制在10%--13%，卷接成宽度1.2米、长度2500-3000米的再造烟叶基片。After the wood pulp paddle is crushed and defibrated into short fibers, it is stored in the storage tank. The length of a single fiber is 2-8mm. While removing the static electricity, the negative pressure generated by the vacuum box 4 makes the fibers form a fluffy, disorderly and staggered short and thin layer on the forming wire 2 through the air-laid method, and then sprays the glue on the surface of the substrate, spraying When using compressed air to fully atomize the material liquid containing the adhesive, spray it on the surface of the substrate, and at the same time suck it under negative pressure on the back of the sprayed surface. : Chitosan 70%, carboxymethyl starch 15%, cyclodextrin 10%, carboxymethyl cellulose 5%,), the substrate sprayed with glue is transported to the oven for drying, and then the other side is treated with the same Spray the glue solution according to the advanced technology, the spraying amount of the adhesive accounts for 2% of the weight of the dry sheet substrate, and then transport it to the oven for drying. 4% of the weight of the dry sheet substrate; the weight of the prepared sheet substrate is 30g/m2 , the corresponding thickness is about 0.3mm, and its dry strength is 3.46N as measured by a vertical computer tensile instrument. With a strength of 1.57N and an elongation of 9.8%, the powder loading capacity of the substrate can reach 3-3.5 times its own mass. The moisture content of the sheet substrate is controlled at 10%-13%, and rolled into a reconstituted tobacco leaf substrate with a width of 1.2 meters and a length of 2500-3000 meters.
实施例2Example 2
把竹浆桨板经解纤成单根纤维后，储存于储料罐，纤维长度为2mm—5mm，储料罐中混入10%的烟末（碎片），计量风送至成形头箱1，通过抗静电绳3和/或抗静电网5去除静电作用的同时，由真空箱4产生的负压作用，经气流成网方法使纤维在成形网上2形成蓬松无序错叠的短纤维薄层，然后喷加胶液，喷涂时利用压缩空气把胶液充分雾化，喷涂到基片表面，同时在喷涂面的背面负压抽吸，胶粘剂的喷加量占干薄片基片重量的4%(胶粘剂质量配比为：壳聚糖50%，支链淀粉淀粉20%，糊精10%，羧甲基纤维素5%，葡甘露聚糖15%)，喷涂了胶液的基片输送到烘箱烘干，然后对基片的另一面喷加胶液，胶粘剂喷加量占薄片质量的4%，再进烘箱烘干，两面的分别喷加使得胶粘剂的喷加量占干薄片基片重量的8%；上述烘箱烘干均采用热风穿透快速烘干，制得的薄片基片克重在35g/m2左右，厚度约为0.3mm，用立式电脑拉力仪测定其干强为4.54N，饱和吸水状态下的强度为1.48N，伸长率为9.6%，该基片的载粉能力可以达到其自身质量的3倍左右。将薄片基片的含水率控制在10-13%，卷接成宽度1.2米、长度2500-3000米的再造烟叶基片。After defibrating the bamboo pulp paddles into single fibers, store them in the storage tank, the fiber length is 2mm-5mm, mix 10% tobacco powder (fragments) into the storage tank, and send the metering air to the forming head box 1, While removing static electricity through the antistatic rope 3 and/or antistatic net 5, the negative pressure generated by the vacuum box 4, through the air-laid method, the fibers form a fluffy and disorderly staggered short fiber thin layer on the forming net 2 , and then spray the glue, use compressed air to fully atomize the glue when spraying, spray it on the surface of the substrate, and at the same time suck the negative pressure on the back of the sprayed surface, the spraying amount of the adhesive accounts for 4% of the weight of the dry sheet substrate (The mass ratio of the adhesive is: chitosan 50%, pullulan starch 20%, dextrin 10%, carboxymethyl cellulose 5%, glucomannan 15%), the substrate sprayed with glue is transported to Oven drying, and then spray glue on the other side of the substrate. The amount of adhesive sprayed accounts for 4% of the mass of the sheet, and then enters the oven for drying. The two sides are sprayed separately so that the amount of adhesive sprayed accounts for 4% of the weight of the dry sheet substrate. 8% of 8%; the above-mentioned oven drying adopts hot air to penetrate and quickly dry, and the weight of the prepared sheet substrate is about 35g/m2 , and the thickness is about 0.3mm. The dry strength measured by a vertical computer tension meter is 4.54 N, the strength under the state of saturated water absorption is 1.48N, and the elongation is 9.6%. The powder loading capacity of the substrate can reach about 3 times of its own mass. The moisture content of the sheet substrate is controlled at 10-13%, and rolled into a reconstituted tobacco leaf substrate with a width of 1.2 meters and a length of 2500-3000 meters.
实施例3Example 3
把木浆浆板经解纤成单根纤维后，储存于储料罐，在储料罐中同时加入10%烟梗短纤维及10%烟末（碎片），纤维长度为2mm—5mm，计量风送至成形头箱1，通过抗静电绳3和/或抗静电网5去除静电作用的同时，由真空箱4产生的负压作用，经气流成网方法使纤维在成形网2上形成蓬松无序错叠的无结构力基片，然后喷涂混合了改善纸基吸食品质的料液的复合胶粘剂料液，喷涂时利用压缩空气把复合料液充分雾化，喷涂到基片表面，同时在喷涂面的背面负压抽吸，胶粘剂的喷加量占干薄片基片重量的3%（胶粘剂质量配比为：壳聚糖40%，酶解淀粉15%，环糊精20%，羧甲基纤维素5%，阿拉伯胶20%），另在配置的复合胶粘剂中加入由烟末磨浆得到的浆料（烟末添加量为基片质量的5%），喷涂后的基片进入烘箱烘干，然后对基片的另一面喷涂复合胶粘剂料液，胶粘剂占干薄片基片质量的3%，再进入烘箱烘干，两面的分别喷加使得胶粘剂的喷加量占干薄片基片重量的6%；上述烘箱烘干均采用热风穿透快速烘干，制得的薄片基片克重为40g/m2，厚度约为0.4mm，用立式电脑拉力仪测定其干强为4.23N，饱和吸水状态下的强度为1.05N，伸长率为10.2%，该基片的载粉能力可以达到基片自身质量的3倍。将薄片基片的含水率控制在10-14%，卷接成宽度1.2米、长度2500-3000米的再造烟叶基片。After the wood pulp board is defibrated into single fibers, it is stored in the storage tank, and 10% short tobacco stem fibers and 10% tobacco powder (fragments) are added to the storage tank at the same time. The fiber length is 2mm-5mm, and the metering The wind is sent to the forming head box 1, and the antistatic effect is removed by the antistatic rope 3 and/or antistatic net 5. At the same time, the negative pressure generated by the vacuum box 4 makes the fibers fluffy on the forming net 2 through the air-laid method. Disorderly stacked non-structural strength substrates, and then spray a composite adhesive material liquid mixed with a material liquid that improves the quality of paper-based absorption. When spraying, use compressed air to fully atomize the composite material liquid and spray it on the surface of the substrate. Negative pressure suction on the back of the sprayed surface, the spraying amount of the adhesive accounted for 3% of the weight of the dry sheet substrate (the mass ratio of the adhesive is: chitosan 40%, enzymatic starch 15%, cyclodextrin 20%, carboxymethyl Base cellulose 5%, gum arabic 20%), in addition, add the slurry obtained from tobacco powder refining (the amount of tobacco powder added is 5% of the mass of the substrate), and the sprayed substrate enters the oven Drying, and then spraying composite adhesive liquid on the other side of the substrate, the adhesive accounts for 3% of the mass of the dry sheet substrate, and then enters the oven for drying. 6% of 6%; the above-mentioned oven drying adopts hot air penetration and rapid drying, and the obtained sheet substrate has a weight of 40g/m2 and a thickness of about 0.4mm, and its dry strength is 4.23N as measured by a vertical computer tensile instrument , the strength under the state of saturated water absorption is 1.05N, and the elongation is 10.2%. The powder loading capacity of the substrate can reach 3 times of the mass of the substrate itself. Control the moisture content of the sheet base sheet at 10-14%, and coil it into a reconstituted tobacco leaf base sheet with a width of 1.2 meters and a length of 2500-3000 meters.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310157779.3ACN103315376B (en) | 2013-04-28 | 2013-04-28 | The method of the reconstituted tobacco substrate that a kind of dry method of paper-making method manufactures |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310157779.3ACN103315376B (en) | 2013-04-28 | 2013-04-28 | The method of the reconstituted tobacco substrate that a kind of dry method of paper-making method manufactures |
| Publication Number | Publication Date |
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| CN103315376A CN103315376A (en) | 2013-09-25 |
| CN103315376Btrue CN103315376B (en) | 2016-04-06 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310157779.3AActiveCN103315376B (en) | 2013-04-28 | 2013-04-28 | The method of the reconstituted tobacco substrate that a kind of dry method of paper-making method manufactures |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101779473B1 (en) | 2014-04-17 | 2017-09-18 | 광둥 골든 리프 테크놀로지 디벨롭먼트 컴퍼니 리미티드 | Apparatus using air-laid paper-making process to produce reconstituted tobacco |
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