US5009955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual modulus oriented elastomeric filaments
Assignee: Motors Liquidation Co
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Filing: 1989-03-06
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Granted: 1991-04-23
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Expires: 2009-03-06
Abstract
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° C. to 120° 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.
Inventors
- 👤 Ismat A. Abu-Isa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:20
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/70; B60N2/7094; D; D01; D01F; D01F6/00; D01F6/78; D01F6/84; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/298
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
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 said polybutylene terephthalate, polybutylene terephthalate/polybutylene isophthalate and polybutylene terephthalate/polyhexane terephthalate in said block copolymers being less than 0.5, said elastomeric filament being further oriented after said spinning by stretching at temperatures between 20° C. to 120° C. to a draw ratio between 500 percent to 700 percent elongation such that said oriented filament having a diameter between 0.33 to 0.51 millimeters and exhibits an ultimate strain no larger than 140 percent when tested in accordance with ASTM D-638 tensile test.
Claim 2
Dependent Claim
139 words
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 said polybutylene terephthalate, polybutylene terephthalate/polybutylene isophthalate and polybutylene terephthalate/polyhexane terephthalate in said block copolymers being less than 0.5, said elastomeric filament being further oriented after said spinning by stretching at temperatures between 20° C. to 120° C. to a draw ratio between 500 percent to 700 percent elongation such that said oriented filament having a diameter between 0.33 to 0.51 millimeters and exhibits an ultimate strain no larger than 140 percent when tested in accordance with ASTM D-638 tensile test.
Claim 3
Dependent Claim
148 words
An oriented elastomeric filament spun from a thermoplastic 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/polyhexane terephthalate and polytetramethylene glycol, and a block copolymer of polyurethane and polytetramethylene glycol, the mole fraction of said polybutylene terephthalate, polybutylene terephthalate/polybutylene isophthalate and polybutylene terephthalate/polyhexane terephthalate in said block copolymers being less than 0.5, said elastomeric filament being further oriented after said spinning by stretching at room temperatures between 20° C. to 120° C. to a draw ratio between 500 to 700 percent elongation such that said oriented filament having a diameter between 0.33 to 0.51 millimeters, exhibits an ultimate strain no larger than 140 percent and a two-stage low tensile modulus and high tensile modulus behavior when tested in accordance with ASTM D-638 tensile test.
Claim 4
Dependent Claim
148 words
An oriented elastomeric filament spun from a thermoplastic 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/polyhexane terephthalate and polytetramethylene glycol, and a block copolymer of polyurethane and polytetramethylene glycol, the mole fraction of said polybutylene terephthalate, polybutylene terephthalate/polybutylene isophthalate and polybutylene terephthalate/polyhexane terephthalate in said block copolymers being less than 0.5, said elastomeric filament being further oriented after said spinning by stretching at room temperatures between 20° C. to 120° C. to a draw ratio between 500 to 700 percent elongation such that said oriented filament having a diameter between 0.33 to 0.51 millimeters, exhibits an ultimate strain no larger than 140 percent and a two-stage low tensile modulus and high tensile modulus behavior when tested in accordance with ASTM D-638 tensile test.
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