Hydroentanglement of continuous polymer filaments
US7091140B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1999 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Apr 7, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/697
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A nonwoven fabric comprises continuous polymer filaments of 0.5-3 denier that have been hydroentangled in a complex matrix of interconnecting filament loops, and that is otherwise substantially free of knotting, or of otherwise wrapping about one another. A process for making a non-woven fabric comprises continuously extruding polymer filaments of 0.5-3 denier onto a moving support, pre-entangling the filaments with water jets, and entangling filaments with a second set of water jets. An apparatus for making a nonwoven fabric comprises means for continuously extruding substantially endless polymer filaments of 0.5-3 denier onto a moving support to form an unbonded web, a pre entangling station for entangling the web with a plurality of water jets, and a plurality of water jets for final entanglement of the filament web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.