Process for increasing stain-resistance of cationic-dyeable modified polyamide fibers
US5662716A · kind A · utility
5Cited by
10References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 1996 |
| Grant date | Sep 2, 1997 |
| Priority date | — |
| Expiry date | May 28, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P5/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to an improved process for dyeing cationic-dyeable polyamide fibers, especially carpet fibers, with an acid dye to provide stain-resistant fibers. The polyamide fibers contain cationically dyeable sulfonate groups along the polymer chain. The improvement involves adding certain water-soluble salts to a dyebath at a concentration of at least 20% based on the weight of fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.