Provided are: a polyurethane foam having a skin layer, which has a good sound absorption coefficient in a low-frequency band of 500-2000 Hz, can be reduced in weight while maintaining sound absorption performance equivalent to or higher than that in the prior art, and can be used as a sound insulation material for vehicles; and a sound insulation material for vehicles. A polyurethane foam having a skin layer and an inner foam layer formed inside the skin layer, the polyurethane foam having a thickness of 3-25 mm, a vertical incidence sound absorption coefficient at a frequency of 1000 Hz of 0.40 or more at a thickness of 10 mm, and a sound insulation material for a vehicle, when the skeletal ratio of the skin layer is set as SS and the skeletal ratio of the inner foam layer is set as SI, the skeletal ratio ratio SS/SI is 2.8-5.0.
本发明提供在500Hz~2000Hz的低频带的吸声系数良好、在能够保持与以往同等以上的吸声性能的同时实现轻量化并且能够作为车辆用隔音材料使用的具有表皮层的聚氨酯泡沫塑料和车辆用隔音材料。一种聚氨酯泡沫塑料和车辆用隔音材料,所述聚氨酯泡沫塑料具有表皮层和形成在所述表皮层的内部的内部发泡层,所述聚氨酯泡沫塑料的厚度为3mm~25mm,在频率1000Hz下的垂直入射吸声系数在10mm厚度下为0.40以上,并且在将上述表皮层的骨架率设为SS、将上述内部发泡层的骨架率设为SI时,骨架率比率SS/SI为2.8~5.0。
Polyurethane foam and sound insulation material for vehicle
聚氨酯泡沫塑料和车辆用隔音材料
2022-08-02
Patent
Electronic Resource
Chinese
IPC: | C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B62D MOTOR VEHICLES , Motorfahrzeuge / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
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