High-quality polyarylene-thioether fibers and method for production thereof
US4816335A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1986 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Mar 24, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
High-quality polyarylene-thioether fibers are provided, which simultaneously satisfy the following conditions: PA1 (a) the polyarylene-thioether is a linear polyarylene-thioether having a melt viscosity of 5,300 to 20,000 poise (at 310.degree. C. and a shear velocity of 200 second.sup.-1); PA1 (b) the fiber diameter is in the range of 1 to 50 microns; PA1 (c) the tensile strength is not less than 40 kg/sq.mm; PA1 (d) the tensile modulus of elasticity is not less than 500 kg/sq.mm; and PA1 (e) the tensile strength at 200.degree. 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.degree. C. and a shear velocity of 200 second.sup.-1), 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.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.