Production of nonwoven fibrous webs including fibers with varying degrees of shrinkage
US7504348B1 · kind B1 · utility
5Cited by
12References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2002 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Aug 8, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Nonwoven fibrous webs are formed including a first group and a second group of fibers, where fibers of the first group are imparted with a degree of shrinkage that differs from a degree of shrinkage imparted to fibers in the second group. During or after bonding of the web, the web may be subjected to heat treatment causing fibers in one of the groups to shrink a greater amount in comparison to fibers in the other group, resulting in nonwoven products with desired textures and other physical characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.