Method for improving light-resistance of aromatic polyamide fibers
US4631066A · kind A · utility
12Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1984 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Jul 18, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/21
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The light-resistance of aromatic polyamide fibers can be improved by heat-treating the aromatic polyamide fibers in the presence of urea and thiourea. The improvement in the light-resistance is enhanced by using aromatic polyamide fibers having an ultraviolet absorber incorporated therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.