Multi-layer co-extruded roofing membrane
US7882671B2 · kind B2 · utility
21Cited by
25References
61Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2007 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Oct 15, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2419/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multi-layer roofing membrane is provided including a top sheet including a co-extruded cap and inner layer and a bottom sheet. The use of a co-extrusion die allows for multi-layer sheets that reduce the need for expensive fillers in all but a cap layer of the membrane. A scrim reinforcement layer is optionally embedded in the membrane. When installed on a roof substrate, the membrane can be sealed by heat welding the seams of the membrane sheets or by other means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.