New chemical fiber products for woolen textile industry

Hhblishi has reached 20° and the single-line output is above 4 million W. To adapt to the ever-changing market trend, the first t-wool textile products should start with raw materials. With the development of new global textile products, the boundaries of cotton, wool, silk and other fibers have been broken, especially the mutual penetration of raw material applications, coupled with the development of new chemical fibers, the performance of chemical fibers has become more natural, differentiated fibers. The rise of new fibers such as functional fibers and green fibers has further promoted the diversification of woolen raw materials. This paper introduces the development of new chemical fiber products for the wool textile industry.

1 The status of chemical fiber industry is 5 million tons (33 million tons of synthetic fiber and 2.1 million tons of cellulose fiber), including 20.4 million tons of polyester, 3.7 million tons of nylon, 2.7 million tons of acrylic 2.7 million tons of polypropylene, and 600,000 tons of vinegar fiber. The output is 9.91 million tons (synthetic fiber 9.70 million tons of cellulose fiber 680,000 tons), including 7.72 million tons of polyester, 470,000 tons of nylon, 590,000 tons of acrylic fiber, and 300,000 tons of polypropylene. This is the continuous production of chemical fiber in China since 1997. In 6 years, it occupied the first place in the world.

Global fiber production will continue to grow in the next few years. According to reports, by 2005, the world's chemical fiber production will reach 44.3 million tons, including synthetic rubber 40.2 million tons and man-made fiber 2.2 million tons. By then, China's chemical fiber production will also rise, and the share of chemical fiber in the textile market will be The 55% increase to 65%. The global chemical fiber industry is and will continue to move to the Asia Pacific region. From 2001 to 2002, there were more than 300 new and under construction chemical fiber projects in the world, and half of the polymer and fiber projects. The countries and regions involved in these projects account for 62% of European countries and 38% of Asian countries and regions. Among the Asian regions, mainly China and Taiwan, followed by India, Indonesia, Pakistan, Iran and South Korea.

There are three obvious trends in the growth of chemical fiber production in mainland China.

In 1998, there were only 25 chemical fiber enterprises with an annual output of over 50,000 tons in China, and 46 in 2001. The development of chemical fiber enterprises in the direction of large-scale and large-scale, in order to reduce production and management costs, make domestic chemical fiber products competitive.

The production capacity and output of China's chemical fiber are concentrated in the eastern coastal areas, especially in Zhejiang and Jiangsu. At present, the chemical fiber production in Zhejiang and Jiangsu provinces accounts for 14% of the national total, which is half of the national total.

The production capacity of private enterprises has expanded rapidly. In 1998, the number of state-owned enterprises accounted for 54.95% of the total number of chemical fiber enterprises in the country, and the number of private enterprises was 36.89%. However, the capacity of state-owned enterprises fell to 47.67% in 2001, while the number of private enterprises rose to 42 in the long-term production of chemical fiber. The longest and fastest variety has a full-year long-term rate of 23%. It is estimated that the polyester fiber rate will reach 16.5% in 2003. Due to its low modulus, polylactide has a good drapability and feel. The pure spinning or blending with wool cotton can be preserved. The factory was based on 16 in 2001 and added a lot in 2002. At present, PET and PA conventional products continue to develop towards large-capacity melt direct spinning, and slice spinning is still used to produce differentiated fibers.

Of course, the development of China's chemical fiber industry, although the output is very fast, but the economic benefits of the entire industry is still not optimistic, the development of various regions is still very uneven. Although China has become a big country in chemical fiber, it is not a strong country, and there are not many high value-added products. China has joined the WTO. Only by developing high-tech products can we improve the economic benefits of enterprises as a whole and participate in the competition in the international market. 2 Chemical fiber new products applied in wool textile industry In early 2002, China Textile Industry Association and China Chemical Fiber Industry Association summarized the development of textile and chemical fiber industry in the previous year, and proposed that the development of textile fabrics should start from chemical fiber production and new chemical fiber products. To develop high-tech fibers and differentiated fibers, it is necessary to increase the proportion of industrial fibers and differentiated fibers.

2.1 New polyester PTT fiber Polytrimethylene terephthalate (PTT) fiber is a new product in the polyester family. PTT fiber combines the characteristics of polyester and polyamide. It has soft handfeel (low modulus) elasticity and elastic recovery, excellent morphological stability, atmospheric pressure dyeing, excellent weather resistance and yellowing resistance. It is very suitable for clothing. The field uses its low-temperature dyeability to blend PTT fibers with natural fibers or synthetic fibers such as wool and cotton to produce new textile fabrics. In addition, PTT fibers can also be used in industrial applications, such as the manufacture of carpets, decorative objects, ribbons and the like. Therefore, PTT fiber is a promising new fiber. The development of wool-like fabrics with new polyester fibers not only alleviates the shortage of wool production, but also adds a lot of color to wool textiles, and also greatly reduces the cost of textiles. The wool-like fabric has the characteristics of full and fullness, good resilience, strong hair feel, smooth and anti-wrinkle, and strong and durable, stable size, non-ironing, easy to wash and dry, etc. Characteristics, so the wool-like products are very suitable for the needs of various consumption levels and are widely accepted.

In traditional woolen textiles, wool-polyester blended fabrics have always dominated. The new polyester PTT fibers blended with wool to improve the performance of the fabric and have great market development potential. With the industrialization of PTT fiber, its application will become a new bright spot, and its beautiful market prospects are receiving more and more attention.

2.2 New Cellulose Fiber Iyocell 1 Fibrin fiber represented by viscose was one of the main raw materials for woolen woolen fabrics and blankets. However, because its traditional viscose fiber is wet spinning, the process is long, energy consumption is high, and environmental pollution is serious. While reducing the traditional process to produce viscose fiber, developed countries attach great importance to the development of technology for the production of cellulose fiber (Lyocell) by the new solvent method, and have made breakthrough achievements.

Lyocell fiber uses a non-emission closed-loop production system to solve the problem of serious environmental pollution in viscose fiber production. The production process is short and has a cost advantage. Lyocell fiber is the strongest of all cellulose fibers. It is similar to polyester. Its wet strength is only 10% lower than dry strength, and its textile processing performance is excellent. Moreover, Lyocell fiber is biodegradable, and the discarded Lyocell fiber does not pollute the environment. It is a green fiber in the 21st century. It conforms to the concept of promoting green textiles today and brings the textile world to a new era.

Most of the cellulose fibers used in the wool spinning industry are low fibrillated fibers, and different types of new cellulose fibers can be selected according to the different styles of the wool spinning products. Lyocell-LF fiber has soft handfeel, good drape, silky luster, moisture absorption, antistatic and high wet strength. With the increasing number of new cellulose fiber and wool blend products, it has broken through the pattern of viscose fiber mainly used for carded wool, which is used to develop worsted products and wool knitwear, thus improving the grade of woolen products, especially suitable for production. Women's and casual wear.

23 Polylactic acid fiber (PLA) In recent years, with the fermentation process of corn and other crops as raw materials to produce lactic acid into industrial scale production, the production cost of lactic acid monomer required to produce polylactic acid is greatly reduced, which is polylactic acid in textile materials. The application created the conditions. After humanity enters the 21st century, environment and sustainable development are a strategic goal facing countries. The research and development of polylactic acid products is of great significance for comprehensive utilization of resources and reduction of environmental pollution. Polylactic acid chips can be made into filaments, short filaments, monofilaments, and flat filaments by extrusion spinning, and can be further processed into woven fabrics, knitted fabrics, nonwovens and the like. The main characteristics of polylactic acid fiber are biodegradable weak acidity, antibacterial, soft handfeel, light texture, good heat resistance (20%~30% higher than polyester), gloss similar to silk, and these properties of polylactic acid become synthetic fiber. "Natural bridge" between natural fibers and natural fibers.

Polylactic acid fiber has excellent processing performance and is a new type of textile wrinkle-proof. It is suitable for coats, women's wear, dresses, underwear, T-shirts, etc.

2.4 New Chitin Fiber Chitin fiber is a fiber spun from a solution of chitin or chitosan, and is a natural high polymer fiber after cellulose fiber.

Chitin fiber not only has good physical and mechanical properties, but also has excellent biological activity of natural polymers. The fiber is non-toxic, has biodegradability which can be completely absorbed by the human body by degradation by lysozyme in the human body; the fiber has low immunogenicity to the human body, and has biological activities such as anti-inflammatory, analgesic and promoting wound healing, and thus is operated in surgery. Sutures, medical dressings, artificial skin, hard tissue repair materials, artificial kidney membranes, antibacterial materials, health underwear fabrics, drug release and other materials have been widely used.

With the pursuit of functional textiles by consumers, the development of new fibers has been further promoted. Chitin fiber can be used as a functional textile fabric to weave an antibacterial new wool textile product.

2.5 Acetate fiber acetate filament has a silk luster and good hand color fastness, light texture, low moisture regain, good elasticity, not easy to pilling, anti-wrinkle, good dimensional stability, antistatic and so on. , underwear, pajamas, casual wear, and can be blended with synthetic fibers to make a variety of men's and women's fashion, men's and women's dresses and suit fabrics. The fabric made of acetate fiber composite yarn has the properties of light weight, good gas permeability and good hand feeling, and has a place in foreign high-end fashion fabrics.

The mixing of the acetate filaments with the filaments is accomplished during the winding section or twisting of the fiber production. In the weaving, the acetate filaments can also be interwoven with the polyester fine denier filaments, and the obtained fabric has both the high strength of the polyester, the silky bright luster of the acetate fiber and the excellent hand feeling. The fabric made of the mixture of acetate fiber and viscose has the appearance and feel of imitation silk or hemp; the acetate fiber is mixed with polyester or nylon, and the elastic fiber is used to make the high-grade women's fabric with wrinkle resistance and excellent stretch. Long and reply. 2.6 Differential acrylic fiber differential acrylic fiber refers to acrylic fiber which has different properties, morphology and function from conventional acrylic fiber through chemical modification or physical modification.

In order to develop high-grade fabrics, we must pay attention to the matching technology and development technology of differentiated and functional fibers. Therefore, we must strengthen the scientific and technological investment and engineering research of acrylic fiber to meet the requirements of high-simulation functional fabrics. At present, there are as many as 1 (1) new varieties of acrylic fiber that are officially put on the market, far exceeding other synthetic fibers. The main varieties of differentiated acrylic fiber are composite acrylic fiber, colored acrylic fiber, ultra-fine acrylic fiber, profiled acrylic fiber, anti-pilling acrylic fiber, high shrinkage acrylic fiber, high elastic acrylic fiber, imitation animal wool acrylic fiber, imitation hemp acrylic fiber, silkworm acrylic fiber, high moisture absorption acrylic fiber. , high water absorption acrylic fiber, high whiteness acrylic fiber, acid dye dyeable acrylic fiber and so on.

27 Water-soluble vinylon With the development of high-yarn yarn, light and thin wool products, the application of water-soluble fiber in the wool spinning industry, especially combed woolen woolen products, is growing. Water-soluble vinylon blended with cotton, hemp, wool and other chemical fibers to make water-soluble tops for spinning and weaving to improve spinnability and weavability. Dissolving water-soluble fibers in the finishing process can increase the yarn count by 20%. Left and right, high-yarn yarn is spun with low-count yarn, and has sizing effect. It can reduce the use of wool grade, increase the use range of wool fineness, reduce the cost of raw materials, but not reduce the fabric performance, and improve the finished style of the fabric. And the quality of the surface, improve the grade of the product, has a strong competitive ability and broad market prospects.

28 Bamboo fiber Bamboo fiber is usually referred to as bamboo viscose fiber, which is a new type of green plant viscose fiber processed by special process. The fineness and whiteness of the fiber are similar to those of ordinary fine bleaching viscose, the strength is good, the stability is uniform, the toughness and wear resistance are good, and the spinnability also meets the requirements of textile processing. Especially unique is that there are many tubular cavities in the bamboo fiber, so the capillary effect is extremely developed, which can absorb and evaporate water in an instant. Moreover, it has natural antibacterial function and is very suitable for making summer fashion fabrics. Newtypechemicalfibersforwooltextile

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