Vinyon Fibers
(Polyvinyl chloride Fibers)

Properties

Vinyon or chlorofibers are man-made fibers in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85 percent by weight of vinyl chloride units (-CH2-CHCl-). In some countries vinyon fibers are referred to as polyvinyl chloride fibers.

The first polyvinyl chloride fiber was invented in Germany in 1931. It was one of the earliest fibers among synthetic fibers. The first U.S. Commercial vinyon fiber was produced in 1939 by FMC Corporation, Fiber Division (formerly American Viscose).

Vinyon is very durable and resistant to weathering (UV) and has good retention properties. Due to its high chlorine content, it is a flame retardant. It also has excellent chemical resistance to many chemicals including oils, solvents, acids and alkalis. However, vinyon fibers are less resistant to heating. Standard grades start to soften and shrink at about 60°C and more stable grades at about 90 to 110°C. Thus polyvinyl chloride fibers are seldom used for clothing, which have to withstand ironing, although fibers of higher resistance to heating are available. When exposed to excessive heat, light, and oxygen, it degrades by elimination of hydrochloric acid. In some cases, it may also produce carbon monoxide and phosgene.

 

COMMERCIAL Polyvinyl Alcohol Fibers

Major manufacturers of vinyon fibers are Teijin and Denka.

 

Applications

Due to its excellent resistant to weathering, pure PVC fibers are mainly used in outdoor fabrics, such as rain gear, tarps, awnings, and fishing nets. The fiber is also used in elastomeric fabrics, as filter cloth, and for wigs and christmas trees due to its flame retardant properties.

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