Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1989-03-06
1991-04-23
Kendell, Lorraine T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
2642108, 428364, D02G 300
Patent
active
050099558
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 terphthalate/polyhexene terephthalate and polytetramethylene glycol, and a block copolymer of polyurethane ad polytetramethylene glycol, the mole fraction of the polybutylene terephthalate, polybutlene terephthalate/polybutylene isophthalate and polybutylene terephthalate/polyhexene terphthalate 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 in such a way that the high modulus is at least 2 times greater than the low modulus.
REFERENCES:
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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
General Motors Corporation
Kendell Lorraine T.
Tung Randy W.
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