Polytrimethylene terephthalate fiber and process for producing the same
US6620502B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/29
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A polytrimethylene terephthalate fiber, a method for producing the same, a cheese-shaped package formed thereof, a false-twist textured yarn using the fiber and a fabric using the false-twist textured yarn are provided. The fiber is composed of 90 mol % or more of trimethylene terephthalate repeating units having a density in a range from 1.320 to 1.340 g/cm3, a birefringence in a range from 0.030 to 0.070, a peak value of thermal stress in a range from 0.01 to 0.12 cN/dtex, a boiling water shrinkage in a range from 3 to 40%, and an elongation at break in a range from 40 to 140%. The inventive polytrimethylene terephthalate fiber has both of proper crystallinity and orientation and is free from the package tightness due to yarn shrinkage and the bulge. The inventive fiber can be produced on an industrial scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.