Automotive sound-absorbing material

a technology for automotive sound absorption and sound insulation, which is applied in the direction of flooring, transportation and packaging, walls, etc., can solve the problems of partial unevenness of the basis weight of the felt, difficult to give uniform air permeability throughout the entire surface of the felt, and inferior sound absorption properties, etc., to achieve superior sound absorption and keep the interior of the automobile quiet
US20090250292A1Inactive Publication Date: 2009-10-08HOWA TEXTILE IND
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
HOWA TEXTILE IND
Publication Date
2009-10-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

A thin and light-weight automotive sound-absorbing material with a superior sound-absorbing property, which can be used, for example, for automotive insulator to keep the interior of an automobile quiet. This automotive sound-absorbing material has a laminate structure comprising a sound-absorbing layer, an intermediate layer, and a sound-absorbing layer. The intermediate layer comprises a film made of thermoplastic resin with a thickness of 10 to 100μ, on which small pores are uniformly opened in such a manner that the aperture ratio would be 0.05 to 5%. The sound-absorbing layers comprise an aggregate of fibers such as felt, glass wool, etc. or porous synthetic resin layer, such as urethane foam, etc.
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Description

BACKGROUND

[0001] 1. Field of the Disclosure

[0002] The present disclosure relates to a light-weight and thin automotive sound-absorbing material with a superior sound-absorbing property that can be used, for example, for automotive insulator provided on the floor, etc. of an automobile for keeping the interior of the automobile quiet.

[0003] 2. Discussion of the Background Art

[0004] Light-weight sound-absorbing materials based on felt are in the mainstream of the recent automotive sound-absorbing materials for reason of reducing the weight of the car body. While felt excels in sound-absorbing property, it has inferior sound-insulating property. Felt has therefore been crushed to reduce the air permeability in order to improve the sound-insulating property in the prior art.

[0005] It was however difficult to give uniform air permeability throughout the entire surface of the felt, since the control of air permeability by crushing the felt resulted in the partial unevenness of the basis weight...

Claims

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