Process for manufacturing a composite nonwoven and installation for carrying out the process
US7484276B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2004 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H13/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A manufacturing process of a composite nonwoven composed of two webs, respectively, a lower web comprising long artificial and/or synthetic fibres, the size of which is between 15 and 80 mm, and an upper web comprising short natural fibres, the size of which is between 0.5 and 8 mm, characterized, on-line, by: dispersing fist of all the natural fibres into the water; then, putting the aqueous dispersion thus obtained on a carded lower web that is about to form or has been manufactured beforehand; then filtering the excess water through the lower web; then interlacing the fibres of the upper web with the fibres of the lower web with water jets; finally drying and then reeling up the obtained nonwoven composite. An installation for carrying out the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.