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Patent Searching and Data


Title:
SOUND ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/106757
Kind Code:
A1
Abstract:
[Problem] To provide a sound absorbing material which sufficiently reduces low-pitched noise to middle- and high-pitched noise of an automobile, etc., and which can be easily attached and installed even during a manufacturing process of an automobile, etc. [Solution] Provided is a sound absorbing material having a two-layer structure formed by bonding: a needle punched nonwoven fabric; and a melt brown nonwoven fabric, which is composed of a long fiber and has an increased thickness by self-fusing, wherein the needle punched nonwoven fabric includes a short fiber in which a fiber having a fiber diameter of 6-8 μm is included in a weight percentage of 40%-55% (exclusive of 40).

Inventors:
NIWA Shu (Shinagawa Front Bldg. 2-3-13, Kona, Minato-ku Tokyo 75, 〒1080075, JP)
Application Number:
JP2017/042827
Publication Date:
June 06, 2019
Filing Date:
November 29, 2017
Export Citation:
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Assignee:
TOYOTA TSUSHO MATEX CORPORATION (Osaka Toyota Bldg, 4-3-11 Minamisenba, Chuo-k, Osaka-shi Osaka 81, 〒5420081, JP)
International Classes:
D04H1/4391; B32B5/26; G10K11/168
Foreign References:
JP2015196933A2015-11-09
JP2002161464A2002-06-04
JPH1191019A1999-04-06
JP2000144565A2000-05-26
JP2015121631A2015-07-02
JP2017081040A2017-05-18
Attorney, Agent or Firm:
KUDO Ichiro (Yurakucho Denki Bldg. South Tower, 7-1 Yurakucho 1-chom, Chiyoda-ku Tokyo 06, 〒1000006, JP)
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