Needling through carrier sheets to form loops
US7156937B2 · kind B2 · utility
63Cited by
98References
92Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2003 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Jun 6, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2555/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A loop fastener product is formed by needling a batt of fibers through a carrier sheet such as a plastic film, to form loops on the other side of the carrier sheet. A binder, such as a powder resin or plastic film, is placed over the fiber side of the product and fused to the carrier sheet to bond the fibers in place. In some cases the product is needled in only discrete areas, leaving other areas free of loops. The product may be formed into outer covers for disposable diapers. Fibers of one resin are readily combined with films and backings of other resins to produce particularly thin and low weight loop materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.