Literature 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.