Vibration damping soundproof sheets for use in vehicles
US4734323A · kind A · utility
61Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1987 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Apr 9, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
This invention is directed to a vibration damping soundproof sheet for use in vehicles, in which the surface of the soundproof layer is made flat irrespective of the or uneven configuration at the surface of a vehicle. The soundproof layer-forming material comprises a formed rubber blend in which a foaming agent and other rubber blending agents are blended with a rubber type polymer in which the soundproof layer-forming material contains from 15 to 85% by weight of 1,2-polybutadiene ingredient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.