The synthetic man-made fibres include the polyamides (nylon), polyesters, acrylics, polyolefin, vinyl, and elastomeric fibres, while the regenerated fibres include rayon, the cellulose acetates, the regenerated proteins, glass and rubber fibres
Manmade protein fibres are produced by dissolving proteins like casein from milk, soya bean protein, and zein from corn in diluted alkali and forcing these solutions through a spinneret into an acid-formaldehyde coagulating bath.
Acrylic fibres are polymers formed by addition polymerization of at least 85% by weight of a chemical called acrylonitrile or vinyl chanide. To polymerise vinyl cyanide the double bond between the first two carbon atoms is broken and the molecules attach themselves to each other in a linear chain.