No Sizing Weaving: Keep Away From Pollution.

Prevention from source

Train of thought: starting from the largest pollutant discharge link

Host: China International Textile held in November 2010.

Zhu Guomin: let's start with the superior products of our company.

Wuxi natural textile industry Co., Ltd. is a national high-tech enterprise specializing in producing all kinds of high-grade yarns, high-grade knitted fabrics and garments. Over the years, the company adheres to the concept of natural environmental protection, concentrating on the development and production of pure natural green high-end textiles, and has invested 4% of its sales volume in the development of new products every year. At present, it has applied for more than 20 invention patents.

With the increasing cost of sewage treatment and the determination of water resources protection over the years, we have chosen the sizing and desizing links for the total production of 30% in the textile production process.

In 2003, a breakthrough has been made in the non slurry technology. The company has established a non pulp research and development team to carry out an attempt and Study on no pulp weaving.

In 2008, the project made substantive breakthroughs, and applied for patent for technological invention. In April 2010, "green environment free slurry weaving technology" was identified by the expert group of China Textile Industry Association, and won the "textile light" China Textile Industry Association Science and technology progress two prize.

In 2010, natural group set up a wholly owned subsidiary, Wuxi nosai Net Technology Co., Ltd., aiming to avoid the marketization and industrialization promotion of slurry weaving technology.

Moderator: in

Zhu Guomin: in the course of the study, we first compare the effect of cotton quality on the efficiency of free sizing and the quality of products in different regions. At the same time, combined with the cotton elongation and strength advantages of different producing areas and the requirements for strength and elongation of woven yarn, two different areas of cotton blended yarn are selected as raw materials for spinning different cotton blending yarns.

The spinning method is also the main factor determining the yarn quality. In practical application, the twist coefficient of the knitting combed cotton strand is controlled within 340 (special number twisting coefficient). The twist factor 380~500 of the carded cotton strand (Warp) is greater than that of the knitting yarn. The yarn twist is greater and the strength is higher. The elongation of yarn is the elongation produced by the breaking of the yarn under the action of tensile force, and the elongation of the yarn increases with the increase of the twisting coefficient. The twist coefficient also affects the subsequent yarn production and processing, and the yarn twist is too high, so it is easy to generate the roll and form the yarn knot, which is not conducive to the later processing. Yarn twist and

Therefore, the determination of yarn twist must take into consideration the yarn strength, elongation and the impact on production and processing.

Moderator: on the basis of the original yarn, and through which technical links to achieve cotton pulp free processing?

Zhu Guomin: the main body of the research on the non sizing technology is single yarn. Starting from the raw material selection, we study the processing technology of the special single yarn to improve the breaking strength of each yarn, reduce the hairiness, increase the breakage rate, increase the wear resistance, increase the softness, and optimize the weaving process to avoid the sizing and desizing process, so as to achieve the highest efficiency of slurry free production process requirements.

The main body of traditional technology research is the whole warp yarn, which depends on sizing to improve the strength of the warp yarn.

Advantages: less fabric and better handle.

Host: in the finishing process, where is the difference between the finishing process of the non sizing material and the traditional woven fabric?

Zhu Guomin: unlike traditional sizing process, the products made of high count yarns are generally of medium and high grade textile fabrics. During the finishing process, in order to improve the quality of products, they need to go through the process of singeing, desizing and mercerizing.

Because our company's special sizing agent has been specially processed in the yarn process, we can avoid the singeing, desizing and mercerizing processes in the finishing process. This not only reduces the input of equipment and auxiliaries, but also makes the paste free fabric feel softer and more flexible compared with the traditional sizing fabric.

Continuous research and development is the basis for the sustainable development of products. For this reason, the company is still doing research and innovation on this basis. At present, we are still studying the finishing process which is more suitable for slurry free fabrics, and adopt more green technology to make the slurry free fabrics achieve the performance of environmental protection and ironing.

Host: what are the performance advantages of the fabrics made from non slurry technology compared with those produced by traditional processes? {page_break}

Zhu Guomin: compared with other technologies at home and abroad, the product has reached the following technical specifications: the cotton reinforced yarn free rate of special treatment is about 10%~20%, the reduction rate is about 15%, the weaving efficiency is 90%, and the average rate of the first grade of the fabric is about 95%. The paste free fabric is better than the traditional sizing fabric in terms of color fastness, breaking strength, tearing strength and anti pilling performance. It is easy to clean and has the function of anti aging. It can still keep the original wearing effect after repeated washing, and it is durable and not easy to deform.

Effect: pollution reduction and cost reduction win win

Moderator: no pulp technology, from the perspective of reducing pollution and saving costs, what economic benefits can be brought to enterprises?

Zhu Guomin: there are many shortcomings in the traditional sizing process.

First, the main raw materials are starch and polyvinyl alcohol (PVA). The use of starch slurry consumes a lot of food resources. Under the current shortage of cultivated land, it is particularly important to reduce the use of starch slurry. Secondly, sizing is only an intermediate link. After weaving, it is necessary to remove the size of warp yarns. Sizing and desizing need to consume a lot of water and energy. Thirdly, the pH value and COD value of desizing wastewater are high, which will cause serious environmental pollution, especially chemical slurry is difficult to degrade, and will cause continuous pollution to rivers and lakes. In addition, the fabric Desizing performance will also affect subsequent dyeing quality and fabric quality.

The sizing and desizing process in traditional process is the most important part of water, electricity and steam consumption in the production of textile fabrics. These two links are avoided, the total water consumption can be reduced by 25%, and the energy consumption can be reduced by 35%.

Therefore, it can be seen from these aspects that the production of woven fabrics without slurry will help textile enterprises to reduce pollution and save costs, which is conducive to the sustainable development of the textile industry in the new situation.

Positioning: promotion of non slurry label

Moderator: it is understood that the current production of non pulp technology fabrics located in high-grade woven fabrics, has been applied in shirts, home textiles products.

What are the characteristics of wearing fabrics when they produce shirts and home textiles with non woven fabrics?

Zhu Guomin: at present, the non woven fabrics used in shirting fabrics are mainly made of 80S/2, 100S/2, 120S/2 and 140S/2 even higher count cotton yarn. Compared with the traditional sizing fabrics, the non sizing fabrics have obvious advantages in performance. The products are gorgeous and glossy, the fabrics are neat and elastic, and they can still maintain excellent cloth effect after repeated washing. At the same time, there is no residual slurry on the fabric, which avoids the harm of residual slurry to the human body. At present, this kind of fabric has been cooperated with the high-end brands in the industry.

The home textile products produced by the production technology without slurry have been extended to star rated hotels.

Host: how will the free sizing fabric be developed in the future?

Zhu Guomin: our company has set up an expert team without slurry to carry out research and development on the finishing and product application of slurry free fabrics. This year, we have embarked on joint textile related departments to set up the "national non woven fabrics R & D and testing center". We launched the suspension application of Non Sizing (slurry free) tag to the whole industry, testing and certifying non slurry products, and issuing Non Sizing (no slurry) tag.

In the next two years, we will first absorb the market segments, such as shirts, home textiles, trousers, children's clothing and other related industries leading enterprises to establish "Non Sizing (no slurry)" industry alliance.

Green environmental protection has become the direction of the development of the textile industry in the future. With the environment friendly and harmless to the human body, the slurry free woven fabrics will surely usher in a larger market space.