Plural extruder method for making a composite building panel
US5565056A · kind A · utility
33Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1995 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2075/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass fiber reinforced building panel is made by extruding molten first and second webs of polymer compounds through spaced die openings, positioned a glass fiber mat between the first and second webs, pressing the webs and mat together, and cooling to form a building panel. The building panel of the invention has improved fire retardance and better field cutting and sawing performance compared with conventional, unreinforced building panels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.