Needled nonwoven material and method for making same
US3994759A · kind A · utility
17Cited by
9References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Jan 15, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/159
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Heat shrinkable fibers are laid down on a backing element, needle-punched and thereafter heated on one surface of the needle-punched fabric in a relaxed condition to a temperature to fuse at least a portion of the fibers adjacent the heated surface and shrink said fibers and first material surface relative to the opposed surface for providing a nonwoven material having a randomly uneven surface. In another embodiment, the backing element is eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.