Sound absorbing article and method of making same
US6119807A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | May 26, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B17/10788
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A sound dampening glazing, for example an automotive windshield, in one embodiment of the invention includes a pair of glass sheets having facilities therebetween. In cross section and moving from one glass sheet to the other, the facilities include a polyvinyl butyral sheet, an intermediate sheet having a surface harder than the surface of the interlayer to smooth the interlayer surface e.g. an intermediate polyester sheet, a sheet of dampening material, a polyester sheet, a polyvinyl butyral sheet. In another embodiment, the automotive windshield has two sheets of dampening material, the sheets have sound dampening properties in different temperature ranges to as to provide the automotive windshield with sound dampening properties over a wider temperature range. Methods for making the glazings of the instant invention are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.