The acrylic fibers are polymers containing at least 85% acrylonitrile. The remaining 15 % contains monomers (vinyl acetate, acrylic esters, vinyl pyrrolidone etc.) which make polymer acquiescent to dyeing with conventional textile dyes. HCN and acetylene are mixed to produce acrylonitrile. Another method is catalytic addition of HCN to ethylene oxide and successive dehydration. Here we obtain an intermediate product, ethylene cyanohydrin before the dehydration. Acrylic fibers possess some unique characteristics like high strength, stiffness, toughness, abrasion resistance, resilience and superlative flex life. They are insensitive to moisture and have good resistance to stains, chemicals, insects and fungi.
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