Process for treating anisotropic melt-forming polymeric products
US4183895A · kind A · utility
35Cited by
15References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1977 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Dec 6, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2067/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fibers with enhanced tenacity are prepared by heat treating oriented fibers from anisotropic-melt-forming linear aromatic and cycloaliphatic polymers, especially polyesters (including copolyesters), while said fibers are essentially relaxed, at temperatures near the flow temperature but sufficiently below to prevent substantial interfilament fusion, for a period of from five seconds to several hours until the fiber tenacity is increased by at least 50% and to at least 10 grams per denier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.