Title:
NON-WOVEN-FABRIC LAYERED BODY FOR SOUND-ABSORBING MATERIAL, AND SOUND-ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/168748
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a non-woven fabric for a sound-absorbing material, and a sound-absorbing material, that have exceptional thickness recovery properties and following properties during molding and also have exceptional sound-absorbing performance. In order to solve this problem, the present invention provides a non-woven fabric layered body for a sound-absorbing material in which a non-woven fabric layer α and a non-woven fabric layer β are layered, wherein: the non-woven fabric layer α contains staple fibers A having a fineness of 0.4-3.8 dtex, staple fibers B having a fineness of 4.0-22.0 dtex, and staple fibers C1 in which a resin having a melting point of 135-190°C is included in an outer layer, the total of the staple fiber A content and staple fiber B content being 86-98 mass% relative to the entire mass of the non-woven fabric layer α, the staple fiber C1 content being 2-14 mass% relative to the entire mass of the non-woven fabric layer α, and the content ratio (staple fiber A content/staple fiber B content) of the staple fibers A and the staple fibers B being 0.05-3.80; the non-woven fabric layer β contains staple fibers C2 in which a resin having a melting point of 70-190°C is included in an outer layer; and the staple fiber C2 content is 20-60 mass% relative to the entire mass of the non-woven fabric layer β, the non-woven fabric layer α and the non-woven fabric layer β being partially fused.
Inventors:
NAKAHARA MAKOTO (JP)
OMORI TAIRA (JP)
OMORI TAIRA (JP)
Application Number:
PCT/JP2022/003266
Publication Date:
August 11, 2022
Filing Date:
January 28, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B5/26; B32B27/36; B60R13/02; D04H1/4374; G10K11/16; G10K11/168
Foreign References:
| JP2000202933A | 2000-07-25 | |||
| JP2018171907A | 2018-11-08 | |||
| JP2019207274A | 2019-12-05 | |||
| JPH1158571A | 1999-03-02 | |||
| JP2012024955A | 2012-02-09 | |||
| JPH10245755A | 1998-09-14 |
Other References:
See also references of EP 4253037A4
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