Process and device for forming non-woven fabrics
US4085485A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1976 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Jul 26, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H18/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process and device useful therein for hydraulically entangling the fibers in a fiber batt to form a non-woven fabric. The process includes applying at least one liquid curtain against the fiber batt while it is supported on a moving, apertured backing screen. The liquid curtain is uniform in width throughout its length and substantially non-diverging as it is delivered from a source of liquid under a pressure sufficient to effect entanglement of the fibers in the batt. Preferably, the pressure is at least about 200 p.s.i.g. and the maximum divergence of the curtain is about 4 degrees. The device for applying the liquid curtain includes first and second members and means for securing the members together to form a chamber therebetween in which the liquid is contained and to form a slot in communication from the chamber to the exterior of the device. The slot has a substantially uniform width along its length and preferably also a uniform depth. The securing means are adjustable so that the width of the slot can be varied; however, once the members are secured together the width of the slot remains constant as the curtain is delivered from the chamber, through the slot, and against…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.