Polyester fiber and process for producing the same
US4869958A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1987 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Mar 17, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A polyester fiber and process embodiments for the production thereof are described, wherein the polyester fiber is produced by high-speed spinning and is characterized by a filament fineness of from 1 to 3 d, a strength of at least 4.0 g/d, an elongation of up to 40%, a crystallinity (X.rho.) of from 40 to 55%, a birefringence of from 140.times.10.sup.-3 to 165.times.10.sup.-3, an orientation function of from 0.36 to 0.45 in the amorphous portion, and a thermal shrinking stress that satisfies the relations EQU 1.1.ltoreq.ST.sub.200 /ST.sub.100 .ltoreq.2.0 (I) and EQU 50.ltoreq.ST.sub.max .ltoreq.180 (II), where ST.sub.100 is the shrinking stress (mg/d) at 100.degree. C., ST.sub.200 is the shrinking stress (mg/d) at 200.degree. C., and ST.sub.max is a peak stress (mg/d) on a thermal shrinking stress curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.