Apparatus for forming nonwoven web
US4109353A · kind A · utility
22Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1977 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Jul 18, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/4878
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Fibrous webs are bonded by passing through a nip comprising an anvil and a hammer vibrating at high frequencies in the presence of uncombined liquid. The liquid is moved within the web causing rearrangement and entanglement of the fibers resulting in improved web properties such as strength, drape, and softness. The nature of the rearrangement and entanglement may be varied to produce random or highly entangled webs having correspondingly varying properties. Other embodiments include the use of additional fibers or other materials in the liquid or in the web and the bonding of multiple layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.