What are the large chemical fiber enterprises in Xiaoshan?

Establish and improve the green chemical fiber standard system, formulate and publish 10 green standards.

Key areas

(1) Focus on cultivating the green design capability of chemical fiber products

Strengthen the application of key green design technologies in the chemical fiber industry, improve the awareness of green development and ecological (green) design capabilities of enterprises, promote the construction of ecological (green) design systems and technological progress, and promote the integration of ecological (green) design with product innovation and development and technical process improvement. Raw material source Green design

Raw material source Green is mainly composed of two parts. The first is to prepare bio-based synthetic fiber raw materials and synthetic fiber products based on corn, cassava and some crop wastes. Overcome key monomer, polymerization and spinning technologies such as polyethylene furan diformate (PEF), polypropylene glycol terephthalate (PTT), bio-based polyethylene terephthalate (PDT), polybutylene terephthalate (PBT), polylactic acid (PLA) and nylon 56, focusing on raw material replacement technology to achieve large-scale production. Develop low-cost, high-quality bio-based fibers and products.

The second is cellulose fiber, protein fiber, seaweed fiber, chitosan fiber and other bio-based regenerated fibers. Focus on the research and development of new cellulose resources bioenzyme pretreatment technology, pulp and fiber integration technology, high efficiency and uniform continuous dissolution and defoaming preparation technology of high concentration stock solution, high-speed and high uniformity dry spray wet spinning technology, stock solution coloring and fiber dyeing, surface functionalization technology, and solvent recovery, concentration and purification technology. Finally, the preparation of bio-based regenerated fibers can be realized as resources, continuous, large-scale, low-cost and functional. Process green design

Green processing design of high performance fiber. Mainly to achieve low-cost, low carbonization, lightweight processing and preparation. The development of carbon fiber filament large-capacity continuous polymerization and control technology, high concentration, high pressure and high density extrusion, high-speed dry spray wet spinning, steam drafting technology, controlled, homogeneous and efficient low temperature pre-oxidation and carbonization technology, and solvent efficient recovery and treatment technology. With the goal of energy saving and emission reduction in the whole process, new technologies such as polymerization spinning and solvent recovery are integrated with intelligent control to achieve green production of high-performance fibers such as carbon fiber.

In the process of preparing green and environmentally friendly high-strength and high-modulus polyethylene fiber, the new green and environmentally friendly solvent is used to replace white oil and decahydronaphthalene, the process flow is short, the equipment is highly automated, and the system is closed and automatically recycled inside to meet the requirements of green and environmentally friendly zero emission, improve the spinning efficiency and greatly reduce the fiber production cost.

Green processing design of nanofibers. Develop low energy consumption and high efficiency preparation technology. The development of multi-component phase separation spinning, high-speed centrifugal spinning technology, high efficiency biological preparation technology, electrostatic spinning, high efficiency spray mesh technology, multiple structure control technology, and high efficiency homogenization scale engineering technology.

Green processing design of general polyamide and polyester fiber. The development of high efficiency catalyst and polymerization device, dimer control technology, liquid phase viscosity adjustment and de-monomer technology, and high efficiency recovery and utilization of polymeric monomer technology. Through the whole process kinetics study, the formation of dimer and monomer is controlled, and the industrialization melt direct spinning technology of polyamide fiber is broken through using catalysis, doping and liquid phase viscosification technology.

Developing polymerization technology such as "one end and two ends" and "double polyol cycle" green catalysis, application technology of new modules such as filament ring blowing and Wings in pre-drafted wire (POY), fully drafted wire (FDY) and industrial silk, recycling technology of ethylene glycol and acetaldehyde, and flexible preparation technology of differentiated functional polyester fiber; To develop flame-retardant, drip resistant, high imitation cotton and homogeneous fiber and its application complete engineering technology, to realize the flexible preparation of large capacity polyester.

Recycle and reuse fiber green design. The development of efficient continuous textile classification technology, high density drying, conveying, melting technology, melt continuous quality control and viscosity control technology, resource technology of hybrid raw materials, and low VOC, heavy and low metal content control technology. By overcoming the key technologies of physical method, physical chemical method and chemical method recycling, the proportion of polyester fiber recycling is improved, and the recycled fiber becomes the third largest fiber supplier in China's textile materials.