Hydrophilic polyester fiber and hydrophilic nonwoven fabric using the same and their production
US6720070B2 · kind B2 · utility
12Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2001 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Apr 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/69
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hydrophilic polyester fiber is supplied with an aqueous mixed dispersion on the surface and made hydrophilic by being heated at 35° C. or higher, and the aqueous mixed dispersion employed contains a polyester-polyether block copolymer composed of a polyester component and a polyether component and is stable at lower than 35° C. and precipitates the polyester-polyether block copolymer when its dispersion state is broken by being heated to 35° C. or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.