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Title:
NONWOVEN FABRIC AND COMPOSITE SOUND-ABSORBING MATERIAL USING SAME AS SKIN MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/124231
Kind Code:
A1
Abstract:
Provided is a nonwoven fabric and a laminated nonwoven fabric suitable as the skin material of a composite sound-absorbing material. The nonwoven fabric and laminated nonwoven fabric are easily formable, thin, and lightweight and excel in form stability, and can nevertheless be controlled within a given range of aeration after being formed into shape. A nonwoven fabric having a laminate structure in which at least one ultra-fine fiber layer (M) having an average fiber diameter of 0.3 to 7 μm (inclusive) and a basis weight of 1 g/m2 to 40 g/m2 (inclusive) and at least one continuous filament layer (S) having an average fiber diameter of 10 to 30 μm (inclusive) are integrated together by partial thermocompression bonding, the nonwoven fabric being characterized in that the continuous filament layer (S) is constituted by a filament containing 97.0 to 99.9 wt% (inclusive) polyester (component A) and 0.1 to 3.0 wt% (inclusive) thermoplastic resin having a glass transition temperature of 114 to 160 °C (component B), and/or a filament having a birefringence index of 0.04 to 0.07 (inclusive), and the bulk density of the ultra-fine fiber layer (M) is 0.35 g/cm3 to 0.70 g/cm3 (inclusive), as well as a laminated nonwoven fabric of the nonwoven fabric and a composite sound-absorbing material in which the nonwoven fabric or laminated nonwoven fabric and a continuous foaming resin foam or porous fiber material are laminated.

Inventors:
YAMAMURO, Shinya (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
OBI, Rumina (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
KATO, Kazufumi (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
TANAKA, Tomoya (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
OKAMURA, Chie (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
ISONO, Yasushi (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
SAITO, Junki (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
Application Number:
JP2018/045985
Publication Date:
June 27, 2019
Filing Date:
December 13, 2018
Export Citation:
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Assignee:
ASAHI KASEI KABUSHIKI KAISHA (1-1-2 Yurakucho, Chiyoda-ku Tokyo, 06, 〒1000006, JP)
International Classes:
D04H3/153; B32B5/26; D04H3/011; D04H3/016; G10K11/168
Domestic Patent References:
WO2004094136A12004-11-04
Foreign References:
JPH086242B21996-01-24
JP2004143632A2004-05-20
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)
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