Multiple layer polymer interlayers having a melt-fractured surface
US8529813B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 28, 2010 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Jan 1, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides multiple layer interlayers having a soft inner polymer layer and relatively stiff outer layers that can be laminated without unacceptable optical distortion and used in various multiple layer glass panel type applications. Multiple layer interlayers of the present invention have surface topography that is formed by controlling the melt fracture that occurs at the exposed surface of the interlayer, or individual layers of the multiple layer interlayer, during formation of the interlayer. By precisely controlling the surface topography of the interlayer, lamination of the interlayer with a rigid substrate does not lead to unacceptable optical distortion caused by the transfer of the surface topography through outer, stiffer layers into softer, internal layers of the interlayer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.