Polyvinyl alcohol fiber (referred to as PVA fiber) is a kind of synthetic fiber which is processed by using specific advanced technology and is made of high-quality polyvinyl alcohol (PVA) with high polymerization degree as raw material.
The main characteristics of polyvinyl alcohol fiber are high strength, high modulus, low elongation, wear resistance, acid and alkali resistance, good weather resistance, and cement, gypsum and other substrates have good affinity and combination, and non-toxic, pollution-free, does not damage the human skin, harmless to the human body, is one of the new generation of high-tech green building materials. Polyvinyl alcohol (PVA), the raw material for the production of Vitellin fiber, is a water-soluble polymer with properties between plastics and rubber and is widely used. China's PVA production capacity and output rank first in the world, followed by Japan, the United Kingdom and North Korea.
Polyvinyl alcohol fiber can be produced by wet spinning and dry spinning, the average molecular weight of the raw material polyvinyl alcohol is 60000 ~ 150000, the thermal decomposition temperature is 200 ~ 220℃, and the melting point is 225 ~ 230℃. After heat treatment, the polyvinyl alcohol fiber was acetalized to obtain polyvinyl formaldehyde fiber. It is called Vinylon in the world.
The polyvinyl alcohol fiber can be blended with other fibers, and then dissolved after textile processing to obtain fine yarn high-grade textiles, and can also be made without twist yarn or weft free blankets. It can also be used as an adhesive for paper making to improve the strength and toughness of paper. In addition, it can also make special purpose overalls, surgical sutures, etc.
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