Multiple layer substrate for roofing materials
US10982441B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2019 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Mar 2, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D2001/005
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is a multiple layer substrate that can be used with a top asphalt applicator that eliminates the need for a bottom asphalt applicator and fines applied to the bottom asphalt layer. A low porosity or impermeable bottom layer prevents the flow of asphalt applied to the porous top layers of the substrate from penetrating the bottom surface. This eliminates the need for fines to prevent sticking of shingles in a shingle stack. In addition, substrate layers that combine fiberglass and polyester fibers in various configurations provide a substrate that can be used in typical shingle manufacturing and manufacturing of waterproofing products that is impact resistant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.