Process for preparing poly (paraphenylene terephthalamide) fibers dyeable with cationic dyes
US4985046A · kind A · utility
17Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Jun 9, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/925
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is provided by this invention a process for preparing poly(paraphenylene terephthalamide) fibers dyeable with cationic dyes. The process comprises soaking poly(paraphenylene terephthalamide) fibers in sulfuric acid, washing the fibers and dipping the acid soaked fibers or never-dried PPD-T fibers in an aqueous solution of a dye promoting species. The fibers can then be dried and subsequently dyed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.