Process for obtaining a composite textile structure based on nonwoven fibrous sheets
US5396689A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1994 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Feb 4, 2014 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H3/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for obtaining a multilayer composite textile structure containing nonwoven fibrous sheets (2, 3) between which is incorporated a reinforcing structure consisting of continuous yarns or filaments (5), the various constituents being bonded together by mutual entanglement of the fibers of the sheets. According to the invention, two nonwoven sheets (2, 3) are produced in which the elementary fibers are arranged preferentially in the length direction. Between these two sheets (2, 3) there is incorporated a sheet (4) of weft yarns (5) which are arranged transversely, at a distance from each other. The sheet (4) of weft yarns is produced immediately upstream of the line of junction (6) between the two nonwoven sheets (2, 3), and downstream of this zone of junction (6) the composite formed is subjected to the action of a mechanical treatment which makes it possible to implant the fibers of one sheet (2) within the other sheet (3) (and optionally vice versa). The homogeneous composite is then reeled up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.