Sound insulating structure
US5677027A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/656
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The disclosure relates to a sound insulating structure formed on an automobile floor panel on which at least one of a vibration and a sound is incident. This structure includes a covering layer for covering the panel and a cushioning layer for reducing an impact of the at least one of the vibration and the sound. This cushioning layer is interposed between the covering layer and the panel and made of a nonwoven fabric. This nonwoven fabric includes 5-95 wt % of a first fiber and 5-95% of a second fiber, wherein the total amount of the first and second fibers is 100 wt %. This first fiber has a fineness within a range from 1.5 to 40 deniers, a first melting point, and a first portion including polyethylene terephthalate. The second fiber has a fineness within a range from 1.5 to 15 deniers, a core portion, and a sheath portion covering the core portion. A majority of the core portion includes polyethylene terephthalate. The sheath portion includes an elastic copolyester which has a second melting point that is lower than the first melting point and is not higher than 200.degree. C. The elastic copolyester is prepared by copolymerizing polyethylene terephthalate and at least one othe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.