Global Fiber Industry Develops Towards Functional Direction

　　 From home Chemical fiber industry The present situation analysis shows that to participate in international competition, we must further develop the application fields of polyester products, including polyester non fiber application. The development and production of modified polyester chips and the development of polyester fiber products. Functional fiber Polyester fiber and new polyester fiber (PTT, PBT, PEN).

　　 In 1998, the proportion of the world's chemical fiber in the three major fields of clothing, decoration and industry was 31:32:37. At present, the proportion of chemical fiber in the three major fields of clothing, decoration and industry is 65:20:15, so there is a big gap with the international level.

With the progress of science and technology in the world and the development of the world industry, synthetic fibers, especially polyester fibers, have developed rapidly in quantity, but they can not meet the requirements of people in terms of performance and function. At present, there has been great progress in the development of differentiated and functionalized polyester fibers abroad. For example, in Japan, from 80s, Shingosen broke away from the era of imitating natural fibers to the current "super real". Xinxin synthetic fiber "In the stage of polyester fiber, such as super loose fiber, super drape fiber, super softness fiber, fragrance fiber and radiation protection fiber, the recent development of synthetic fiber in the United States mainly consists of elastic fiber, industrial yarn, carpet and nonwoven fabric. In the development of polyester fiber products, we focus not only on the development of polyester industrial yarn and nonwovens, but also on the development of polyester fibers for clothing, and a variety of differential fibers, such as improving the luster of fibers. Add different additives, different section shape fibers, different fiber counts, polyester flame retardant filament, hollow polyester filament and low melting point polyester filament. South Korea has recently developed functional fibers and industrial fibers, such as high modulus low stretch high strength polyester yarn, conductive polyester yarn, polyester superfine fiber and so on. Recently, many enterprises in the world have studied the latest research: Sinco engineering company developed a kind of polyester filament with high elastic modulus, made of aromatic polyester tree, mainly composed of aromatic acid, fatty alcohol, aromatic four antanic acid two anhydride with polyester functional group, the elastic modulus of polyester filament made up to 30Gpa, and the breaking stress can exceed 400Mpa.

Moechst Trelira has developed an anti hydrolytic polyester staple fiber and filament. When it is produced, the carrier polymer and the end group capture agent and fiber forming polymer material are sent to the spinneret together, then spilled out from the spinneret, and then solidified by cooling. The polymer carrier has no end group, which can react with the end group capture agent. The fibers made by HoechstAG have high strength and low fuel properties.

AKZO Nobel NV has developed a polyester fiber and yarn with high pilling resistance. Polyvinyl alcohol block copolymer is used as a separate phase to join the polyester mixture in production. The special polymer contains at least 90% mole of polyethylene terephthalate. The polymer is added after the polyester mixture is copolymerized. Its weight ratio is 1-7%. When the polymer and polyester mixture are mixed evenly, the special polyester fiber can be produced by ordinary spinning method.

Pupont has developed a production process for producing three methyl terephthalate continuous filament. The production process includes extruding the melt polymer from the spinneret and forming the primary silk. Cooling air is used to cool the filament by applying oil to the filament, heating and drafting the filament, and then the filament passes through the nozzle with hot fluid, and the filament is deformed in this way, and the filament is three-dimensional curled, and then the filament is cooled and wound into finished yarn.

Allied-Signal has developed a polyester yarn for tire cord. The yarn is not only high in strength and stable in size, but also melts and melts the polyethylene terephthalate melt from the spinneret to produce primary silk when it is produced, so that the raw silk passes through a slow cooling zone and a fast cooling zone. The raw silk is quickly cooled and solidified, and then the draft wires are drafted to obtain polyester yarn with partial orientation and a certain degree of crystallinity. Finally, the finished yarn is finished by hot drafting.

Shakevpeave has developed a polyester monofilament, which is prepared by melt spinning of high temperature mixed resin. The mixed resin consists of high temperature polyester resin, polyethylene terephthalate resin and high temperature stabilizer. The polyester monofilament has excellent high temperature resistance and resistance to thermal degradation.

Taiwan, China has made some progress in developing new polyester products. In addition, great progress has also been made in the development of new polyester fibers, such as Ding Erzhi (PBT), poly (terephthalate two) (PTT), poly (two formic acid ethyl ester two ester) (PEN), an important variety of polyester fiber, and a polyester variety that can compete with polyethylene terephthalate two (PET) in the 21st century.

　　 With the needs of China's economic development, people's requirements for the properties of synthetic fiber are getting higher and higher. At present, some new varieties abroad are basically domestic, such as special-shaped, hollow, composite, fine denier and ultra fine denier. Three different blend fibers and cationic modified polyester chips and filaments, some of which have already been produced in scale. The development and progress of functional polyester fibers are also faster, such as flame retardancy, antistatic, UV protection, heat preservation, water absorption, antibacterial and electromagnetic shielding functions. Large enterprises and research institutes have gained successful experience in the development of these new products. At present, the development of chemical fiber production technology and equipment has been modularized to higher speed, high efficiency, high quality, large continuous short distance, automatic effort saving, multi machine flexible use and fine denier composite multi-function unit structure. Key technologies such as microfiber spinning, three foreign fiber spinning and post processing, composite fiber and composite fiber technology have also been mastered in developing new polyester fiber varieties. These technologies have laid the foundation for the differential and functional development of polyester fibers. The development of new products and new technologies for polyester fibers is a process of gradual mastery and maturity. To make new products go to the market as soon as possible, we should attach importance to the development and application of "one-stop" in organizing products, strengthen market research, and develop new products in the market orientation.