Patent ID: 6228488
Filing Date: 2001-05-08
Classification: C08G,D01F,Y10T

Abstract:
Yarn having a force-displacement profile such that:(a) when said yarn is subjected to an initial stress barrier of from about 0.8 gram/denier to less than or equal to about 1.2 grams/denier, said yarn elongates to less than 5 percent and has an initial modulus in the range from about 30 grams/denier to about 80 grams/denier;(b) upon subjecting said yarn to greater than said initial stress barrier and to less than or equal to about 1.5 grams/denier, said yarn elongates further to at least about 8 percent; and(c) upon subjecting said yarn to greater than 1.5 grams/denier, the modulus increases sharply and said yarn elongates further until said yarn breaks at a tensile strength of at least about 6 grams/denier, wherein said yarn comprises a multiplicity of fibers, all of said fibers have substantially the same force-displacement profile, and are made from polymers having a glass transition temperature in the range from about -40.degree. C. to about +70.degree. C.