Composites from wet formed blends of glass and thermoplastic fibers
US5409573A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Dec 28, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2309/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for forming a self-supporting preform layer of a homogeneous blend of relatively long glass staple length fibers and wettable fine denier staple length thermoplastic filaments wherein a neutral pH aqueous slurry of the glass fibers and filaments are formed into a mat using conventional papermaking equipment. In the preferred process the wettable thermoplastic filaments are dispersed first in the water then followed by the addition of the glass fibers. The self-supporting preform when converted into a molded composite structure results in a substantially void-free structure of individual glass fibers embedded in a thermoplastic resin matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.