Noise isolation sheet

A technology of sound insulation panels and sound-absorbing materials, applied in sound-proof doors/windows, sound-generating devices, instruments, etc., can solve problems such as unsatisfactory noise and unsatisfactory absorption, and achieve the effect of improving waterproof performance and effective waterproof performance

Inactive Publication Date: 2006-02-01
NISHIKAWA RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Furthermore, the sound-absorbing material disclosed in Unexamined Patent Publication No. 8-146967 can only effectively absorb noise in the range of 100Hz-300Hz, and cannot satisfactorily absorb noise around 1000Hz
The sound-absorbing material disclosed in Japanese Patent Laid-Open No. 2503215 also cannot satisfactorily absorb noise of about 1000 Hz

Method used

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Examples

Experimental program
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Embodiment Construction

[0047] A sound insulation panel 10 according to a first preferred embodiment of the present invention will be described below with reference to FIGS. 1-6. Fig. 1 is an exploded perspective view showing the acoustic panel 10 in an installed state. Each of FIGS. 2-6 is a sectional view showing the sound insulation panel 10 taken along line I-I of FIG. 1 .

[0048] Each of these sound insulation panels 10 is installed between the door inner panel 1 and the inner door trim 2 of the vehicle, completely or partially covering the inner side of the door inner panel 1 . The sound insulation board 10 is composed of a closed-cell foam layer 11 , an open-cell foam layer 12 , and a fiber sound-absorbing material 13 .

[0049] The closed-cell foam layer 11 and the open-cell foam layer 12 can be made of synthetic rubber such as EPDM, CR, SBR and NBR, and in this preferred embodiment, they are made of EPDM because its specific gravity can be easily controlled. The fiber sound absorbing mate...

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Abstract

There is provided a noise isolation sheet 10 which is comprised of an optional number of closed-cell foamed layer 11, open-cell foamed layer 12 and fibered noise absorbing material 13, being laminated in an optional order, and which insulates the noise near 1000 Hz. Further, there is provided a noise isolation sheet 10 comprised of an optional number of the closed-cell foamed layer 11 and the fibered noise absorbing material 13 being laminated in an optional order. There is also provided a noise isolation sheet 10 comprised of an optional number of the open-cell foamed layer 12 and the fibered noise absorbing material 13 being laminated in an optional order. Each noise isolation sheet 10 is used to partially or fully cover an interior side of a door inner panel of a vehicle.

Description

technical field [0001] The present invention relates to a sound insulation panel used as a panel mounted, for example, on the inner side of a door of a vehicle. Background technique [0002] Various sound insulation devices are generally applied to the inner side of a door of a vehicle with the aim of preventing external noise from intruding into the interior of the vehicle and preventing internal noise from leaking to the outside of the vehicle. For example, a device has been invented in which felt or urethane is attached to the back of an interior door trim which is installed on the inside of the door inner panel, and in which the urethane The finished product is attached to the inner panel of the door. [0003] In consideration of the prior art described above, the applicant of the present invention invented and applied for a patent for a sound insulation panel (Japanese Patent Laid-Open No. 2004-020415), in order to improve the sound insulation performance of convention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E06B5/20B32B5/24B32B5/32B60R13/08G10K11/168
CPCB32B2305/022B32B2605/08B32B5/32B32B2305/20B32B2307/102G10K11/168B32B5/24B60R13/0815B32B5/22B32B33/00B32B2307/10B32B5/245B32B2266/06B32B2266/08B32B5/18
Inventor 小原义弘须崎康义江盛真一郎
Owner NISHIKAWA RUBBER
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