EP0195422A2
Expired / Lapsed
EP
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High-quality polyarylene-thioether fibers and method for production thereof
Assignee: Kureha Corp
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Filing: 1986-03-19
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Granted: —
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Expires: 2006-03-19
Abstract
Abstract High-property polyarylene-thioether fibers are provided, which simultaneously satisfy the following conditions: (a) the polyarylene-thioether is a linear polyarylene-thioether having a melt viscosity of 5,300 to 20,000 poise (at 310°C and a shear velocity of 200 second-'; (b) the fiber diameter is in the range of 1 to 50 microns; (c) the tensile strength is not less than 40 kg/sq.mm; (d) the tensile modulus of elasticity is not less than 500 kg/sq.mm; and (e) the tensile strength at 200°C is not less than 20 kg/sq.mm. - The fibers are produced by continuously melt-spinning a linear polyarylene-thioether polymer having a melt viscosity of 5,300 to 20,000 poise (at 310°C and a shear velocity of 200 second-'), continuously stretching the spun filament, and continuously heat-setting the stretched filament for 0.02 to 100 seconds at a temperature of not lower than the melting point of the polymer minus 100°C.
Inventors
- 👤 Toshitaka Kouyama
- 👤 Harunobu Egawa
- 👤 Yo Iizuka
- 👤 Zenya Shiiki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 06:28
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/76; D01F6/765; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
High-property polyarylene-thioether fibers which simultaneously satisfy the following conditions: (a) the polyarylene-thioether is a linear polyarylene-thioether having a melt viscosity of 5,300 to 20,000 poise determined at a temperature of 310°C and a shear velocity of 200 second-'; (b) the fiber diameter is in the range of 1 to 50 microns; (c) the tensile strength is not less than 40 kg/sq.mm; (d) the tensile modulus of elasticity is not less than 500 kg/sq. mm; and (e) the tensile strength at 200°C is not less than 20 kg/sq.mm.
Claim 2
Dependent Claim
87 words
High-property polyarylene-thioether fibers which simultaneously satisfy the following conditions: (a) the polyarylene-thioether is a linear polyarylene-thioether having a melt viscosity of 5,300 to 20,000 poise determined at a temperature of 310°C and a shear velocity of 200 second-'; (b) the fiber diameter is in the range of 1 to 50 microns; (c) the tensile strength is not less than 40 kg/sq.mm; (d) the tensile modulus of elasticity is not less than 500 kg/sq. mm; and (e) the tensile strength at 200°C is not less than 20 kg/sq.mm.
Claim 3
Dependent Claim
16 words
The fibers according to Claim 1, in which the polyarylene-thioether contains as a main component a
Claim 4
Dependent Claim
26 words
The fibers according to Claim 1, in which the polyarylene-thioether is a block copolymer consisting essentially of not less than 50 molar % of a repeating
Claim 5
Independent Claim
143 words
A method for producing high-property polyarylene-thioether fibers simultaneously satisfying the following conditions, which method comprises continuously melt-spinning a linear polyarylene-thioether polymer having a melt viscosity of 5,300 to 20,000 poise (at 310°C and a shear velocity of 200 second-'), continuously stretching the spun filament, and continuously heat-setting the stretched filament for 0.02 to 100 seconds at a temperature of not lower than the melting point of the polymer minus 100°C: (a) the polyarylene-thioether is a linear polyarylene-thioether having a melt viscosity of 5,300 to 20,000 poise (at 310°C and a shear velocity of 200 second-'); (b) the fiber diameter is in the range of 1 to 50 microns; (c) the tensile strength is not less than 40 kg/sq.mm; (d) the tensile modulus of elasticity is not less than 500 kg/sq.mm; and (e) the tensile strength at 200°C is not less than 20 kg/sq.mm.
Claim 6
Independent Claim
143 words
A method for producing high-property polyarylene-thioether fibers simultaneously satisfying the following conditions, which method comprises continuously melt-spinning a linear polyarylene-thioether polymer having a melt viscosity of 5,300 to 20,000 poise (at 310°C and a shear velocity of 200 second-'), continuously stretching the spun filament, and continuously heat-setting the stretched filament for 0.02 to 100 seconds at a temperature of not lower than the melting point of the polymer minus 100°C: (a) the polyarylene-thioether is a linear polyarylene-thioether having a melt viscosity of 5,300 to 20,000 poise (at 310°C and a shear velocity of 200 second-'); (b) the fiber diameter is in the range of 1 to 50 microns; (c) the tensile strength is not less than 40 kg/sq.mm; (d) the tensile modulus of elasticity is not less than 500 kg/sq.mm; and (e) the tensile strength at 200°C is not less than 20 kg/sq.mm.
Claim 7
Dependent Claim
16 words
The method according to Claim 4, in which the polyarylene-thioether contains as a main component a
Claim 8
Dependent Claim
26 words
The method according to Claim 4, in which the polyarylene-thioether is a block copolymer consisting essentially of not less than 50 molar % of a repeating
References Cited (Backward Citations)
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