Writer： admin Time：2025-06-03 17:26 Browse：
"Vinylene was once a hero in solving the problem of clothing. Now, high-strength and high-modulus PVA fibers are replacing carcinogenic asbestos in an environmentally friendly manner, and water-soluble fibers are revolutionizing the textile and papermaking industries - these special fibers are quietly reshaping the future of industry."
Overview of polyvinyl alcohol fibers
Polyvinyl alcohol fibers (PVA fiber) can be made into a variety of synthetic fibers through dry or wet spinning. Among them, these fibers can be further converted into polyvinyl alcohol formal fibers, namely vinylene, through formaldehyde treatment. Vinylene plays an important role in the industrial field and is widely used in the production of canvas, waterproof cloth, filter cloth, conveyor belts, etc. It can also be used for packaging materials, medical and sanitary materials, etc. Before the 1970s, vinylene was an important textile raw material in my country and made significant contributions to solving the problem of clothing for the people.
With the advancement of manufacturing processes and technologies, the proportion of special fiber products in the PVA fiber industry has gradually increased, and its application fields have become increasingly extensive. At present, the main products with large output in my country's polyvinyl alcohol special fibers include high-strength and high-modulus PVA fibers and water-soluble PVA fibers. High-strength and high-modulus fibers show broad prospects in the field of green building materials with their high strength, high Young's modulus, low elongation, good acid and alkali resistance and solvent resistance. As a functional differentiated fiber, water-soluble PVA fiber has ideal water-soluble temperature, strength and elongation, as well as good acid resistance, alkali resistance and dry heat resistance. It is odorless and non-toxic after dissolving in water. It is an excellent green and environmentally friendly product.
Looking to the future, polyvinyl alcohol special fiber products will become an important development direction of the PVA fiber industry. Among them, high-strength and high-modulus fibers, water-soluble fibers that dissolve at low temperatures of 20°C and below, flame-retardant fibers without droplets or comfortable types, and fibers for ECC will become research hotspots. At the same time, we also need to pay attention to the breakthroughs and developments in the industrial production technology of some products.
Market supply and demand
◆ High-strength and high-modulus PVA fibers
In 2020, the global demand for high-strength and high-modulus PVA fibers reached 80,000 tons, of which about 70,000 tons were used in the field of building materials, mainly to replace asbestos, and a small amount was also used in the concrete industry. In the domestic market, according to statistics from the China Chemical Fiber Industry Association, the actual output of high-strength and high-modulus polyvinyl alcohol fibers in my country in 2020 was 44,800 tons. In downstream applications, except for a small amount of flame-retardant fibers used in special clothing fields such as public security, armed police, and navy, most of these fibers are used to replace asbestos and added to cement products, thereby enhancing the strength and crack resistance of cement.
Industry development trend
◆ Asbestos replacement trend
Due to environmental protection and health requirements, high-strength and high-modulus PVA fibers have excellent adhesion to cement, making them an ideal substitute for asbestos. In view of the carcinogenicity of asbestos, international organizations such as the World Health Organization and the United Nations have called for a ban on asbestos products. In developed countries such as Europe and the United States, high-strength and high-modulus PVA fibers have been widely used to replace asbestos, and have achieved remarkable results in the production of asbestos-free cement boards. my country has also clearly listed high-strength and high-modulus PVA fibers as the preferred substitute for asbestos products. With the improvement of people's quality of life and the increasing awareness of environmental protection and health, the replacement of asbestos by high-strength and high-modulus PVA fibers has become an irreversible trend.
◆ Demand for water-soluble PVA fibers
Water-soluble PVA fibers are widely used in the textile industry. For example, as fabric pulp, its varieties include filaments and wool strips, and are often used to make water-soluble non-woven fabrics. In addition, this fiber is also widely used in products such as untwisted towels. Due to the water-soluble properties of polyvinyl alcohol, PVA fibers occupy an indispensable position in the water-soluble non-woven fabric market. At the same time, PVA fibers also show superiority in the field of papermaking. They can be used as the skeleton material of paper and effectively improve the strength of paper. Driven by the demand of industries such as textiles and papermaking, the market prospects of water-soluble PVA fibers are particularly optimistic.
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