Guidance on high-quality development of chemical fiber industry

Third, promote the high-end development of new fiber materials

(1) Increase the added value of conventional fibers. To achieve high-quality, intelligent and green production of conventional fibers, develop differentiated and functional fiber products such as super simulation and stock solution coloring, improve the performance and quality stability of functional fibers, expand the application field of functional fibers, and promote the industrialization and high-end application of biomedical fibers. Strengthen the quality control of the entire production process, promote the supply of high-quality products, and meet the upgrading and personalized needs of consumption.

(2) Improve the production and application level of high-performance fibers. Improve the production and application level of carbon fiber, aramid, UHMWPE fiber, polyimide fiber, polyphenylene sulfide fiber, polytetrafluoroethylene fiber, continuous basalt fiber, and improve the quality consistency and batch stability of high-performance fiber. Further expand the application of high-performance fibers in aerospace, wind and photovoltaic power generation, Marine engineering, environmental protection, safety protection, geotechnical construction, transportation and other fields.

Box 2 Key technological breakthroughs and efficient and low-cost production of high-performance fibers

1. High performance carbon fiber. Overcome the preparation technology of large filament tow above 48K, high strength, high die and high extension, T1100 and M65J carbon fiber, break through the equipment manufacturing technology of high-precision metering pump, spinneret, draft machine, wire take-up machine, wide-width pre-oxidation furnace, high and low temperature carbonization furnace, wide-caliber graphitization furnace and other equipment, and develop composite material technology and equipment such as automatic lay molding and automatic die molding. Develop carbon fiber composite repair and reuse technology.

2. Aramid. Research and development of para-aramid raw materials efficient dissolution, spinning stability control, high temperature heat treatment, solvent recovery and other key technologies, large capacity continuous polymerization, high-speed spinning, high stability and high-speed traction, drafting equipment manufacturing technology. To overcome key technologies such as solvent system of meta-aramid fiber, efficient defoaming of spinning stock solution and high-speed spinning, and develop the industrialization technology of high-strength and high-elongation meta-aramid fiber.

3. Other high-performance fibers. Improve the production technology level of heat resistance, creep resistance, high strength, high cutting resistance, corrosion resistance, radiation resistance UHMWPE fiber, fine denier, profiled section polyphenylene sulfide fiber, fine denier, fire prevention and nuclear polyimide fiber. Breakthrough in the key technologies of monomer synthesis and purification of aromatic polyester fiber, polyp-phenylene benzoxazole fiber, polyether ether ketone fiber, and high-speed stable spinning. Develop basalt fiber large-scale tank kiln, multi-variety differentiated infiltrating agent and other technical equipment, research and development of the third generation of continuous silicon carbide fiber preparation technology, breakthrough alumina fiber, silicon-boron-nitrogen fiber, zirconia fiber and other key preparation technology.

4. High-performance fiber innovation platform. Promote the construction of high-performance fiber and composite material innovation platform, focus on the common key technologies and engineering problems of high-performance fiber and composite material industry, and form a whole industrial chain of basic chemical raw materials - high-performance fiber/high-performance polymer - composite materials and products molding processing - product testing and evaluation - product application.

(3) Accelerate the development of bio-based chemical fibers and degradable fiber materials. Improve the purity of bio-based chemical fiber monomers and raw materials, accelerate the integration of stable, efficient and low-energy complete sets of technology and equipment, and achieve large-scale and low-cost production. Support the key technical equipment of degradable fiber materials such as degradable aliphatic polyester fiber, break through the technical bottleneck of raw material preparation and efficient polymerization reaction, strengthen the evaluation of fiber degradability, and guide downstream applications.

Box 3: Technological research and industrialization of bio-based chemical fibers and degradable fiber materials

1. Bio-based chemical fiber raw materials. Breakthrough in Lyocell fiber special pulp, solvent, crosslinking agent and fiber grade 1, 3-propanediol, succinic acid, 1, 4-butanediol, furan dicarboxylic acid, high light pure lactide and other biological monomers and raw materials efficient preparation technology.

2. Bio-based chemical fibers. Improve the key technologies for large-scale production of Lyocell fiber, polylactic acid fiber, bio-based polyamide fiber, propylene glycol terephthalate fiber, polyethylene furanediate fiber, seaweed fiber, chitosan fiber, etc. The green manufacturing technology of cellulose fiber such as ionic liquid solvent method (ILS method) and low temperature urea method was studied.