Process to prepare polymeric fibers with improved color and appearance
US6495079B1 · kind B1 · utility
3Cited by
15References
18Claims
0Family size
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Key dates
| Filing date | Jun 28, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Jan 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2933
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The use of a sulfonated polyester ionomer resin in a colored, drawn polyamide or polyester fiber results in improved color strength and appearance. Sodium sulfo isophthalate polybutylene terephthalate copolymers when melt blended with synthetic polyamides or polyesters are shown to enhance color strength in drawn fibers. In addition the sulfonated polyesters reduce color strength variation in colored fibers made with different batches of colorant. Water insoluble sulfonated polyester ionomers are preferred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.