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A platform for research: civil engineering, architecture and urbanism
LAMINATED SOUND ABSORPTION MATERIAL
To provide a sound absorption material which has high sound absorption in low to middle frequency regions, and is also excellent in moldability.SOLUTION: A laminated sound absorption material is obtained by laminating a thermoplastic resin layer, a sound absorption material layer, and a surface material layer in this order, in which the thermoplastic resin layer has Asker C hardness of 40-95 and an open cell ratio of 3-30%; the surface material layer has a thickness of 20-500 μm; a maximum value (Ymax) of a sound absorption coefficient of the laminated sound absorption material at a frequency of 200-3,200 Hz by a vertical incidence measurement method is 0.5 or more; and a range (Xrange) in such a frequency region that the sound absorption coefficient is equal to or more than a value (Y85) that is 85% of the maximum value of the sound absorption coefficient at the frequency of 200-3,200 Hz is 240 Hz or more.SELECTED DRAWING: Figure 2
【課題】低～中周波数領域での吸音性が高く、成形性にも優れた吸音材を提供すること。【解決手段】熱可塑性樹脂層と、吸音材層と、表面材層とが順に積層されてなる積層吸音材であって、熱可塑性樹脂層は、アスカーＣ硬度が４０～９５であり、かつ連続気泡率が３～３０％であり、表面材層は、厚みが２０～５００μｍであり、積層吸音材の垂直入射測定法による周波数２００～３２００Ｈｚにおける吸音率の最大値（Ｙmax）が０．５以上であり、吸音率が該周波数２００～３２００Ｈｚにおける吸音率の最大値の８５％である値(Ｙ85)以上である周波数領域の範囲（Ｘrange）が２４０Ｈｚ以上であることを特徴とする積層吸音材。【選択図】図２
LAMINATED SOUND ABSORPTION MATERIAL
To provide a sound absorption material which has high sound absorption in low to middle frequency regions, and is also excellent in moldability.SOLUTION: A laminated sound absorption material is obtained by laminating a thermoplastic resin layer, a sound absorption material layer, and a surface material layer in this order, in which the thermoplastic resin layer has Asker C hardness of 40-95 and an open cell ratio of 3-30%; the surface material layer has a thickness of 20-500 μm; a maximum value (Ymax) of a sound absorption coefficient of the laminated sound absorption material at a frequency of 200-3,200 Hz by a vertical incidence measurement method is 0.5 or more; and a range (Xrange) in such a frequency region that the sound absorption coefficient is equal to or more than a value (Y85) that is 85% of the maximum value of the sound absorption coefficient at the frequency of 200-3,200 Hz is 240 Hz or more.SELECTED DRAWING: Figure 2
【課題】低～中周波数領域での吸音性が高く、成形性にも優れた吸音材を提供すること。【解決手段】熱可塑性樹脂層と、吸音材層と、表面材層とが順に積層されてなる積層吸音材であって、熱可塑性樹脂層は、アスカーＣ硬度が４０～９５であり、かつ連続気泡率が３～３０％であり、表面材層は、厚みが２０～５００μｍであり、積層吸音材の垂直入射測定法による周波数２００～３２００Ｈｚにおける吸音率の最大値（Ｙmax）が０．５以上であり、吸音率が該周波数２００～３２００Ｈｚにおける吸音率の最大値の８５％である値(Ｙ85)以上である周波数領域の範囲（Ｘrange）が２４０Ｈｚ以上であることを特徴とする積層吸音材。【選択図】図２
LAMINATED SOUND ABSORPTION MATERIAL
積層吸音材
HATANO AYANO (author) / YAMASHITA JUNSHI (author) / YAMAGISHI TAKAMASA (author)
2022-07-06
Patent
Electronic Resource
Japanese
IPC:
B32B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
,
Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse
/
E04B
Allgemeine Baukonstruktionen
,
GENERAL BUILDING CONSTRUCTIONS
/
G10K
Tonerzeugungsvorrichtungen
,
SOUND-PRODUCING DEVICES
Sound absorption material and method of manufacturing sound absorption material
| European Patent Office | 2015