Composite nonwoven fabric
US6381817B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2001 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Mar 23, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/689
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A composite nonwoven fabric is formed by providing a synthetic fiber web comprising staple length polymeric fibers, and a cellulosic fiber web, preferably comprising wood pulp fibers. Prior to integration of the webs, the synthetic fiber web is subjected to hydroentangling to form a partially entangled web, with the cellulosic fiber web thereafter juxtaposed with the partially entangled web for hydroentanglement and integration of the webs. Pre-entanglement of the synthetic fiber web desirably acts to minimize the energy input required for integration of the cellulosic fiber and synthetic fiber webs, and also desirably acts to abate loss of the cellulosic fibers during hydroentanglement and integration of the webs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.