Method and device for producing perforated nonwovens by hydrodynamic needling
US6405416B1 · kind B1 · utility
8Cited by
17References
6Claims
0Family size
Inventor
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2021 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H18/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Method and device for producing perforated nonwovens by hydrodynamic needling. A nonwoven with a basically clean hole structure on a drum with plastic elevations can be produced by energy-rich water jets. Depending on the thickness of the fibers used in the nonwoven, however, certain fibers can nevertheless be stretched transversely across a hole. In order to avoid or eliminate this, the perforated nonwoven is subjected to singeing flames after drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.