Hhblishi has reached more than 20° where single-line production is above 4 million W. In order to adapt to the ever-changing market trend, industrial wool textile products should start with raw materials. With the development of new global textile products, breaking the boundaries of fibers such as cotton, wool, and silk, especially the mutual penetration of raw material applications, coupled with the development of new chemical fibers, the performance of chemical fibers tends to be more natural, differentiated fibers The rise of new fibers such as functional fibers and green fibers has further promoted the diversification of wool spinning raw materials. This article introduces the development of new chemical fiber products for the wool textile industry.
1 The current status of chemical fiber industry is 5 million tons (synthetic fiber 33 million tons, cellulose fiber 2.1 million tons) of which polyester fiber is 20.4 million tons, nylon fiber is 3.7 million tons, acrylic fiber is 2.7 million tons polypropylene fiber 6 million tons, and cellulose acetate fiber is 600,000 tons. The output is 9.91 million tons (compressed synthetic fiber 9.15 million tons of cellulose fiber 680,000 tons) of which there are 772 million tons of polyester, 470,000 tons of nylon, 590,000 tons of acrylic, and 300,000 tons of polypropylene. This is the first consecutive increase in China's chemical fiber output since 1997. 6 years ranked first in the world.
Global fiber production will continue to grow in the next few years. It is reported that by 2005, the world's chemical fiber production will reach 44.3 million tons, of which 42.05 million tons of synthetic fiber, 2.2 million tons of man-made fiber. At that time, China's chemical fiber production will also follow the rise, the share of chemical fiber in the textile market will be now The 55% increase to 65%. The global chemical fiber industry is and will continue to shift to the Asia-Pacific region. From 2001 to 2002, more than 300 chemical fiber projects were newly built and under construction in the world, with half of the polymer and fiber projects. The countries and regions covered by these projects account for 62% of European countries and 38% of Asian countries and regions. In Asia, they are mainly mainland China and Taiwan Province, followed by India, Indonesia, Pakistan, Iran, and South Korea.
In mainland China, the following three obvious trends have emerged in the length of chemical fiber production.
In 1998, there were only 25 chemical fiber enterprises with an annual output of more than 50,000 tons in China. By the year 2001, it had grown to 46. The chemical fiber companies are developing toward large-scale and large-scale production, so as to reduce the production and management costs and make domestic chemical fiber products competitive.
China's chemical fiber production capacity and production are concentrated in the eastern coastal areas, especially in Zhejiang and Jiangsu. Currently, the total output of chemical fiber in the two provinces of Zhejiang and Jiangsu accounts for 14% of the national total, which is half of the national total.
The productivity of private enterprises has rapidly expanded. 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, by 2001, the production capacity of state-owned enterprises dropped to 47.67%, while private enterprises rose to 42% in the longest chemical fiber production. Polyester fiber is One of the fastest varieties, the long-term annual rate reached 23%, is expected in 2003 polyester fiber length will reach 16.5%. PET melt spinning factory weaving raw materials. Due to its low modulus, the polylactic acid has a good drape and feel. Pure cotton or blended fabrics with cotton wool can be shaped. The factory was based on 16 companies in 2001. In 2002, it added a lot. At present, PET, PA conventional products continue to develop towards the melt spinning of large capacity, while slice spinning is still used to produce differentiated fibers.
Of course, the development of China's chemical fiber industry, although the production is very fast, but the economic efficiency of the entire industry is still not optimistic, the development of the various regions is still very unbalanced. Although China has become a big chemical fiber country, it is still not a strong country, and there are not many high-value-added products. China has joined the WTO, only the development of high-tech products can improve the overall economic efficiency of enterprises in order to participate in the international market competition. 2 Chemical Fiber New Products Applied in Wool Spinning Industry At the beginning of 2002, the China National Textile and Apparel Council and the China Chemical Fiber Industry Association, when summing up the operation status of the national textile and chemical fiber industries in the previous year, 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, we must increase the proportion of industrial fibers and differentiated fibers.
2.1 New Polyester PTT Fiber Polypropylene terephthalate (PTT) fiber is a new product in the polyester family. PTT fiber combines the properties of polyester and polyamide. It has soft touch (low modulus) elasticity and elastic recovery, excellent morphological stability, atmospheric dyeing, excellent weather resistance, yellowing resistance, and is very suitable for clothing. The field utilizes its low-temperature dyeability to blend PTT fibers with natural fibers such as wool and cotton, or synthetic fibers, intertwine, and interweave to develop new textile fabrics. In addition, PTT fibers can also be used in industrial applications, such as manufacturing carpets, decorations, webbing, and the like. Therefore, PTT fiber is a promising new fiber. The use of new polyester fibers to develop wool-like fabrics not only alleviates the lack of wool production, but also adds a large variety of colors to wool textiles, while also significantly reducing the cost of textiles. Its wool-like fabrics are not only full-blown, but also have good elasticity, good hair-like sensation, smooth and anti-wrinkle characteristics, and they are also durable, dimensionally stable, easy to wash, fast-dry, etc. Characteristics, so the wool-like products are very suitable for the needs of various levels of consumption, has been widely accepted.
In traditional woollen textiles, wool-polyester blended fabrics have always dominated. New-type polyester PTT fibers are blended with wool to improve the properties of fabrics and have great potential for market development. With the industrialization of PTT fiber, its application will surely become a new bright spot, and its bright market prospects will receive more and more extensive attention.
2.2 New Type of Cellulose Fiber Iyocell 1 Fibrin fibers, represented by viscose, were once one of the main raw materials for woolen worsted woolen cloths and blankets. However, due to its traditional viscose fiber using wet spinning, long process flow, high energy consumption and serious environmental pollution. While reducing the production of viscose fibers in traditional processes, developed countries attach great importance to the development of new solvent-based Lyocell technology and have made breakthroughs.
Lyocell fiber adopts an emission-free closed-loop production system to solve the problem of severe environmental pollution in the production of viscose fibers. The production process is short and has cost advantages. Lyocell fiber is the highest strength of all cellulose fibers, similar to polyester, wet strength is only 10% lower than the dry strength, excellent textile processing performance. Moreover, Lyocell fiber is biodegradable. Lyocell fiber will not pollute the environment. It is a 21st-century green fiber that conforms to the concept of promoting green textiles today, bringing the textile world to a new era.
Most of the cellulose fibers used in the wool textile industry are low-fibrillated fibers, and different types of new cellulosic fibers may be selected according to different styles of the wool textile products. Lyocell-LF fiber feels soft, drapability, silky luster, moisture absorption, antistatic, high wet strength. With the increasing number of new types of cellulosic fibers and wool blends, viscose fibers have been used mainly in the pattern of carded woollen fabrics to develop worsted products and worsted knitwear, thereby improving the grade of woolen products, and are particularly suitable for production. Women's and casual wear.
23 Polylactic acid fiber (PLA) In recent years, with the production of lactic acid by fermentation processes such as corn and other crops as raw materials, the production cost of lactic acid monomers required to produce polylactic acid has been greatly reduced. This is polylactic acid in textile materials. The application creates conditions. After the mankind entered the 21st century, the environment and sustainable development is a strategic goal that all countries face. Research and development of polylactic acid products have important implications for the 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, and nonwovens. The main characteristics of polylactic acid fiber are biodegradable, weakly acidic, antibacterial, soft to the touch, light texture, good heat resistance (20%~30% higher than polyester), gloss is similar to silk, these properties of polylactic acid become synthetic fiber The "natural bridge" between natural fibers.
Polylactic acid fiber has excellent processing performance and is a new type of anti-wrinkle textile. It is suitable for jackets, women's wear, dresses, underwear, T-shirts and so on.
2.4 Novel chitin fibers Chitin fibers are fibers spun from chitin or chitosan solutions and are another natural polymer fiber following cellulose fibers.
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 that can be completely absorbed by the body by degradation by lysozyme in the human body; the fiber has little antigenic immunity to the human body, and has biological activity such as anti-inflammatory, analgesic, and wound healing, so it is in operation Sutures, medical dressings, artificial skin, hard tissue repair materials, artificial kidney membranes, antibacterial materials, health underwear fabrics, drug slow release and other materials have been widely used.
With the quest for functional textiles among consumers, the development of new fibers has been further promoted. Chitin fiber can be used as a functional textile fabric to weave new antibacterial wool textile products.
2.5 Acetate acetate filaments are widely used to make linings because of their silk luster, good color fastness to hand infection, light texture, low moisture regain, good elasticity, low pilling, anti-wrinkle, good dimensional stability, antistatic properties, etc. , underwear, pajamas, casual wear, and can be mixed with synthetic fibers made of composite yarn to produce a variety of men and women fashion, men and women dresses and suits fabrics. Fabrics made with acetate fiber composite yarns have properties such as light weight, good breathability and good hand feeling, and they have a place in foreign high fashion fabrics.
The compounding of the acetate filaments with the synthetic filaments is accomplished during the winding section of the fiber production or during the twisting. In the weaving process, the acetate filaments can also be interwoven with the polyester filaments, and the resulting fabrics have both the high strength of the polyester and the silky bright luster and excellent feel of the acetate fibers. The fabrics made from the blend of acetate fibers and viscose have the look and feel of imitation silk or hemp; the acetate fibers are mixed with polyester or nylon, and the elastic fibers make the haute fabrics with wrinkle resistance and excellent stretch. Long and reply. 2.6 Differentiated Acrylics Acrylics are made of acrylic fibers that are different from conventional acrylic fibers and have special properties, shapes, and functions through chemical modification or physical modification.
In order to develop high-grade fabrics, we must pay attention to differential and functional fiber supporting technology and development technology. 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, as many as 1 (1) new varieties of acrylic fibers are officially put on the market, far exceeding other synthetic fibers. The main varieties of differentiated acrylic include composite acrylic, colored acrylic, superfine acrylic, irregular cross-section acrylic, anti-pilling acrylic, high-shrinkage acrylic, high-elastic acrylic, imitation wool acrylic, imitation acrylic, silk-like acrylic, highly absorbent acrylic , High-absorbent acrylic, high-white acrylic, acid dyes can be dyed acrylic and so on.
27 Water-Soluble Vinylon With the development of high yarn count and light weight in wool textiles, water-soluble fibers are increasingly used in the wool textile industry, especially combed woolen wool products. Mixing water-soluble vinylon with cotton, hemp, wool and other chemical fibers to make water-soluble tops for spinning and weaving can improve the spinnability and weavability. Dissolving water-soluble fibers in the finishing process can increase the yarn count by 20%. Around, high count yarns are spun with low count yarns, and have sizing effect, which can reduce the use of wool grades, increase the use of wool fineness, reduce raw material costs, but do not reduce the fabric performance, but also improve the finished style of the fabric And the quality of the surface, improve product quality, with strong competitiveness 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 techniques. The fineness and whiteness of the fiber are similar to that of general fine bleached viscose, and its strength is good, and its stability is uniform. It has good toughness and wear resistance, and its spinnability also meets the requirements of textile processing. Especially unique is that there are many tubular cavities inside the bamboo fiber, so the capillary effect is extremely developed, it can absorb and evaporate water instantly, and furthermore, it has natural antibacterial function and is very suitable for making summer fashion fabrics. Newtypechemicalfibersforwooltextile
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