Description and references
Staple fiber copolymer of 60% vinyl chloride
and 40% acrylonitrile wet spun from acetone, stretched hot as much
as 1300% and then annealed by heat treatment: E. E. Stout, Introduction to Textiles (John Wiley, New
York, 1960) pp 198-201; R. W. Moncrieff, Man-Made
Fibres (John Wiley, New York, 1963) pp 411-420; Kennedy, “Modacrylic
Fibers” in Encyclopedia of Polymer Science
and Technology vol. 8, N. M. Bikales, Ed. (Interscience,
New York, 1968) pp 812-839.
Properties
Light cream fiber which can be bleached nearly
white. Specific gravity 1.31. Tenacity ranges from 2.0 to 3.5 g/denier.
Elongation is 30-40%; hygroscopicity is 0.4% under standard conditions.
Has extremely good chemical resistance. Acetone is the best solvent;
cyclohexanone and dimethylformamide also have some solvent action.
Acetic anhydride, acetaldehyde, aniline, ethylene dichloride, and
methyl ethyl ketone all plasticize or swell dynel. Resistant to clothes
moths' larvae, to carpet beetles, and to mildew and fungus. Will
burn in a flame, but if the flame is removed it is self-extinguishing.
Resistant to water and non-felting and non-shrinking below the boil.
Hot water delusters dynel. Must be ironed with the lowest iron setting
and a dry cotton cover over the fabric. May be heat-set in permanent
pleats. Can be dyed readily and may be solution-dyed. Resistant
to perspiration and to salt-water deterioration.Use
In apparel and household furnishings; simulated
fur coats; chemically resistant clothing. In making wigs and doll
hair; the hair can be washed, combed, set, and in some instances,
redyed.