Complex comprising a drylaid veil of glass fibres, and a nonwoven fabric of organic fibres
US7412756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Feb 6, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/697
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for preparing a complex sheet including a layer of drylaid glass fibers and a layer of organic fibers. The process includes mechanical needling or fluid entanglement, e.g. hydroentanglement, of a nonwoven fabric of continuous organic fibers and of a veil of non-preconsolidated continuous glass fibers, the nonwoven fabric of organic fibers and the veil of glass fibers being juxtaposed and needles being sent from the same side as the nonwoven fabric of organic fibers, to make a sheet, and then application of a binder to the bilayer. The so obtained complex fibrous structure shows a low tendency to delaminate and can be impregnated with asphalt or bitumen, and can be used in the field of roofing, sealing covering, or membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.