Foamed polymer-fiber composite
US6344268B1 · kind B1 · utility
86Cited by
456References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1998 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Apr 3, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249989
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Foamed polymer-fiber composites, building materials and methods of making such building materials are provided by this invention. The composites include about 35-75 wt. % of a polymeric resin, about 25-65 wt. % fiber and have a specific gravity of less than about 1.25 g/cc. The low density is provided by the introduction of a blowing agent or gas into a molten precursor of the composite during thermo forming, such as in an extrusion operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.