Nomenclature
Fiber X-54; Exlan. Description and references
A copolymer of acrylonitrile possibly with
acrylamide or a substituted acrylamide. Ref: R. W. Moncrieff, Man-Made Fibres (John Wiley, New York, 1963)
p 483.
Properties
Off-white fiber. Specific gravity 1.17. Sticks
at 210°. Shrinkage in boiling water, 1%. Sunlight has negligible
effect. Resistance to acids: good except to mineral acids. Resistance
to alkalies: fair to dilute, poor to concd. Good resistance to cleaning
solvents. Superior to its forerunner, fiber X-51, in the ease with which it can be dyed.Use
Recommended for those uses that acrylics generally
fill. It is claimed that it can be durably pleated.