Process for bleaching denim fabrics and garments
US4852990A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1987 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Aug 24, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P1/5257
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for bleaching fabrics or garments which produces a uniformly colored product with relatively few, less pronounced streaks is disclosed. The process requires fewer steps and increases efficiency over previous processes, while at the same time decreases the number of excessively streaked products which do not satisfy quality control standards. A preferred embodiment of the process, suited to denim fabrics or garments, comprises the steps of desizing the fabric or garment, and thereafter, without turning garments, immersing the fabric or garment in an aqueous solution containing from about 0.01 to about 10 grams per liter of a polyacrylic acid, and then adding a bleaching agent to the aqueous solution to produce a bleach bath. The fabric or garment is maintained in the bleach bath for a time sufficient to bleach the fabric or garment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.