Dual modulus oriented elastomeric filaments

Details Dual modulus oriented elastomeric filaments Dual modulus oriented elastomeric filaments

1990-12-19

1992-10-06

Ryan, Patrick J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428401, 525305, 525307, D02G 300

Patent

active

051530651

ABSTRACT:
An oriented elastomeric filament spun from a thermoplastic elastomeric material selected from the group consisting of a block copolymer of polybutylene terephthalate and polytetramethylene glycol, a block copolymer of polybutylene terephthalate/polybutylene isophthalate and polyethylene glycol/polypropylene glycol, a block copolymer of polybutylene terephthalate/polyhexene terephthalate and polytetramethylene glycol, and a block copolymer of polyurethane and polytetramethylene glycol, the mole fraction of the polybutylene terephthalate, polybutylene terephthalate/polybutylene isophthalate and polybutylene terephthalate/polyhexene terephthalate in the block copolymers is less than 0.5, the elastomeric filament is further oriented after the spinning by stretching at temperatures between 20.degree. C. to 120.degree. C. to a draw ratio between 500 to 700 percent elongation such that the oriented filament exhibits a two-stage low tensile modulus and high tensile modulus behavior when tested in accordance with ASTM D-638 tensile test.

REFERENCES:
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patent: 3161436 (1964-12-01), Hood
patent: 3651014 (1972-03-01), Witsiepe
patent: 3766146 (1973-10-01), Witsiepe
patent: 4096126 (1978-06-01), Tanaka et al.
patent: 4211689 (1980-07-01), Borman
patent: 4545614 (1985-10-01), Abu-Isa

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