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Since Shell Companies invented the main raw material of 1,3PDO PTT in 1990, by 2004, Canada polymer Co., Ltd., with the annual capacity of 95 thousand tons, has become the world's first large-scale PTT continuous production line. PTT fiber has become a new type of fiber material in the textile industry due to its low modulus, soft handle, good elasticity, excellent antistatic and antifouling properties.

Many textile enterprises with a forward-looking vision in China are keenly aware of the huge market space of PTT fiber. They have joined the PTT industry chain and developed many distinctive products.

In this period, we invite the PTT polymer, the trade name Corterra, as the raw material, to produce the downstream enterprises of different products -- Wujiang Xinmin Chemical Fiber Co., Ltd., Xiao Xing Chemical fiber (Jiaxing) Co., Ltd. and Wuxi Feng Gu Technology Co., Ltd., to talk about their product development, production and sales.

Host: Wujiang Xinmin Chemical Fiber Co., Ltd. is a representative product in the development of the downstream products of the tall fiber. The total PTT filament, PTT/PBT composite elastic yarn and polyester modified elastic yarn have difficulty in weaving. How do you solve them?

Dai Jianping: the physical and chemical properties of PTT determine the unique properties of PTT fiber. The properties of PTT fiber mainly lie in its strength less than PET fiber, elongation 200% higher than PET fiber, and elasticity 2~5 times higher than that of PET filament. Therefore, PTT tenon and PTT/PET composite elastic elastic wires must strictly control the tension uniformity in the post processing processes such as falling, twisting, sizing, pulling and so on, so as to prevent the resulting dyeing differences, while strictly controlling the temperature and time of stereotypes and dyeing, so as to ensure the quality and stability of finished products.

Host: what materials can be made from filament, composite wire and stretch yarn, and what kind of clothing can these fabrics be used to produce?

Dai Jianping: PTT filament is mainly used for the production of memory fabrics. It can be interwoven with silk, cotton, silk, polyester, nylon and so on. It is suitable for developing high-end clothing such as dress, fashion, etc. the composite elastic wire is mainly used to develop elastic series fabric instead of spandex yarn, and can be interwoven with superfine fiber and natural fiber. It is mainly used for producing high-grade clothing fabrics such as suits, jackets, windbreaker and so on.

Host: Xanadu-55 (hereinafter referred to as X-55) is PTT/PET composite elastic fiber developed by PET PU of Xiao Xing group.

Excuse me, manager Li, what are the excellent performances of X-55 compared with spandex, PBT or 100%PTT?

Li Anqing: compared with spandex: X-55 has excellent resilience. It does not need to be processed at elbow or knee. It does not need compound processing. It is easy to wash and fast drying. It has the characteristics of chlorine resistance and bleaching. It is easy to handle, easy to iron and wrinkle.

PBT; good moisture absorption and quick drying.

Host: what terminal products are suitable for application?

Li Anqing: it is suitable for the production of casual clothing, such as jeans, shirt cloth, uniforms, sportswear, such as sportswear, golf shirts, swimsuits, formal jackets, suits, trousers and tops.

Host: what are the possible problems and solutions for the development of PTT/PET composite elastic fibers? Li Anqing: X-55 is commonly used for weft weaving. The warp is currently being tested in Korea. The main reason is that the tension of warping process is not easy to control due to the large elasticity of fibers.

In the fabric design, because the X-55 fabric has a higher shrinkage rate, the width of the fabric is 32% to 35% shrinkage of the finished product / grey fabric. Therefore, the design of the finished fabric width should be paid special attention to.

During the weaving process, X-55 raw materials need to be stored for a period of time before the raw materials are used, and the raw materials should be used in conjunction with the finished products in the same period. The products with too long intervals are not easy to use together, otherwise the finished products will be uneven and wrinkled due to elastic differences.

When it is stored, the finished cloth can not be pressed to cause wrinkles, and it is required to be placed in a predetermined shape or before entering the cylinder. Otherwise, wrinkles will eventually form.

The setting temperature of dyeing and finishing is lower than that of conventional PET, otherwise the handle is hard and the elasticity is poor. The recommended temperature is generally 160~170 degrees.

Host: Wuxi Fung Technology Co., Ltd. is taking a unique road in the application of high tech, developing and producing colored yarn products. Please introduce Wu Wu, which key links need to be noticed in the production of color silk, and at the same time, what convenience can the downstream enterprises bring in the application?

Wu Dadong: PTT has similar dyeing properties to PET, and has some apparent dyeability. However, there are still some difficulties and risks in the process of structure and processing.

Whether PTT is dyed or dyed with yarn, there are problems such as high consumption, low production rate and unstable quality.

This is an obstacle to promoting the application of PTT and making it the goal of large fiber in twenty-first Century.

Our company is a company that has been engaged in hi-tech chemical fiber development and post application for many years. It has a certain foundation for the process of raw material spinning, yarn processing and weaving preparation. On the basis of years of practice, we have developed and applied PTT dyed silk, and some harvest can be shared with colleagues in the industry.

The cheese dyeing of the PTT SSM filament is difficult in the winding density of the loose cylinder. Most of the loose tube equipment in the domestic factory is not competent at present. Finally, we have imported the imported pine car.

In addition, the heat shrinkage rate of the other PTT filament is too large. That is to say, the loosened cylinder made by SSM is easy to dye when it is not properly controlled in dyeing. For this purpose, we have adopted the technology of loosening cylinder - boiling yarn - loose cylinder dyeing - the purpose is to ensure the stability of dyeing, and the upper and lower winding densities of the two loose cylinders are 0.4g/cm3 and 0.3g/cm3 respectively.

In the dyeing process, we should pay special attention to the heating rate, which usually takes half of polyester, especially when it is dyed in light color, otherwise it is also easy to dye flowers.

For example, our experience is that the warping should be small tension and low speed. When the air jet weaving is done, the tension should not be too large. Generally, it will be used at about 0.1 ~ 0.15cn/dtex. Proper reduction of the density of the heald slice will help to clear the mouth, improve the production environment management and avoid flying flowers, so that the efficiency can reach more than 90% at the speed of 500r/m.

If the weft yarn is also dyed, the fabric can be used directly as finished cloth.

Even after finishing, in addition to functional finishing, the other thing to do is wash away the stains only, and the fabric is made in high proportion.

The application of PTT dyed silk in woven fabrics, such as memory fabrics, not only brings more color imagination to fabric design, but also helps to simplify the finishing process of fabric and control the fabric effect. It can completely meet the processing requirements of garments, and has the characteristics of low shrinkage, stable color and good color fastness.

Finally, it is worth mentioning that the high elastic dyeing yarn of PTT bicomponent filament has good tensile resilience, high color fastness, sun resistance, chlorine resistance, antifouling and ironing, soft handle, and can be applied to weaving and knitting. It has great development prospects.

Auxiliary sweater enterprises to develop and expand the sharp weapon, do not see you will regret it!