To provide a sound insulation material which has both excellent lightweight and sound insulation properties.SOLUTION: A sound insulation material 1 comprises a foamed part 2 and a surface layer 3 covering the foamed part 2. The foamed part 2 and surface layer 3 are both made of mutually different materials. The foamed part 2 has a density equal to or less than 100 kg/m, and the surface layer 3 has a density more than 100 and equal to or less than 10,000 kg/m, and has a permeation amount equal to or less than 5 L/min/cm.SELECTED DRAWING: Figure 1
【課題】軽量性および遮音性がともに良好な遮音材を提供すること。【解決手段】遮音材1は、発泡部2と、発泡部2を被覆する表層3とを備え、発泡部2および表層3は、互いに異なる材料から形成されており、発泡部2の密度が、100kg/m3以下であり、表層3の密度が、100kg/m3を超過し、10000kg/m3以下であり、表層3の通気量が、5L/min/cm2以下である。【選択図】図1
SOUND INSULATION MATERIAL
遮音材
2019-03-07
Patent
Electronic Resource
Japanese
IPC: | G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / 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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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