Polyacrylonitrile fiber: A multi-enabler in the high-performance fiber field！

Polyacrylonitrile fiber (commonly known as acrylic fiber) is a synthetic fiber polymerized from acrylonitrile as the main monomer. With its excellent high-temperature resistance, high specific strength, good corrosion resistance and wool-like texture, it has become an important category in the field of synthetic fibers. It has the advantages of easy availability of raw materials, flexible processing and controllable costs. It is not only widely used in the textile field, but also shows great potential in high-end fields such as industrial protection, new energy and environmental protection. With the iterative upgrading of production processes, the performance of polyacrylonitrile fibers has been continuously optimized, and their application boundaries have been continuously expanded, making them a key material for promoting high-quality development in multiple industries.

The precisely controlled production process endows the product with outstanding characteristics. Polyacrylonitrile fibers are prepared by solution polymerization - wet or dry spinning processes. By optimizing the monomer ratio, polymerization temperature and spinning parameters, the linear density, strength and heat resistance of the fibers can be precisely regulated. The softening temperature of conventional polyacrylonitrile fibers can reach 190-240℃. They perform stably for long-term use below 150℃, and their tensile strength is superior to that of common polyester and nylon. After special modification, it can also possess functional characteristics such as anti-static, flame retardant and antibacterial properties. In addition, its fiber structure is loose and porous, with excellent moisture absorption and breathability. The wool-like effect is very realistic, and it is known as "synthetic wool". In the textile field, it can replace part of the natural wool.

In the field of textile and apparel, its wool-like characteristics and durability perfectly meet diverse demands. In garment manufacturing, polyacrylonitrile fibers can be spun alone or blended with wool, cotton, viscose and other fibers to make sweaters, coats, scarves and other products. They not only retain the soft hand feel of natural fibers, but also have the advantages of synthetic fibers such as wear resistance, anti-wrinkle and less shrinkage, reducing the maintenance cost of clothing. In the home textile field, it is used to produce soft furnishings such as blankets, curtains and sofa covers. It features bright colors and high color fastness, which can maintain the beauty of the fabric for a long time. Meanwhile, its high-temperature resistance is suitable for daily washing and disinfection needs.

In the industrial and high-end fields, its high-performance advantages demonstrate its core value. In the field of industrial protection, fireproof suits and high-temperature operation labor protection suits made of polyacrylonitrile fibers can resist the invasion of high-temperature environments and provide safety guarantees for workers. In the field of environmental protection, the filter materials made from it have excellent acid and alkali resistance as well as high-temperature resistance, and can be used for high-temperature flue gas filtration in industries such as metallurgy and chemical engineering, effectively purifying waste gas. In the field of new energy, high-performance polyacrylonitrile precursor is the core raw material for preparing carbon fibers. After undergoing processes such as pre-oxidation and carbonization, it can be made into high-strength carbon fibers, which are widely used in high-end manufacturing fields such as aerospace and new energy vehicles.

In the future, with the deepening of the green manufacturing concept, the polyacrylonitrile fiber industry is upgrading towards environmental protection and high-end development. The research and development of bio-based acrylonitrile raw materials and the energy-saving optimization of spinning processes will further reduce the carbon emissions of the products. The continuous innovation of high-performance modified varieties will drive breakthroughs in more special fields, injecting new impetus into high-end manufacturing and green development.