Process for making an apertured nonwoven fabric
US4024612A · kind A · utility
42Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1976 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Apr 2, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H1/495
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The tensile strength of apertured nonwoven fabric can be increased by a change in the two-stage process of impinging fine columnar streams of liquid, first onto one face of a fibrous web and then onto the opposite face thereof, the change being that the asymmetrical woven wire screen on which the web is positioned during the second stage of the process is oriented with the wire forming the higher knuckle in the screen running in the direction of passage of the web beneath the fine columnar streams, with the area weight of the web being from 0.5 to 2.0 oz/yd.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.