PROBLEM TO BE SOLVED: To provide a vehicle interior trim material capable of enhancing sound absorbing performance without increased thickness of a sound absorbing material.SOLUTION: A sound absorbing material 11 is formed in a corrugated shape, and a plurality of cut and raised pieces 13 are formed on an inclined surface of each of crest parts in the corrugated shape at predetermined intervals in a length direction of the crest parts. Consequently, a surface area to absorb sound by the sound absorbing material 11 is increased, and a back air layer S having a volume corresponding to the corrugated shape is formed between a trim member 10 and the sound absorbing material 11. As a result, sound absorbing performance of the sound absorbing material 11 is improved, and sound absorbing effect owing to the back air layer S is obtainable.
【課題】吸音材の厚みの増大化等を伴わずに吸音性能を高められる車両用内装材の提供を図る。【解決手段】吸音材11を波形状に形成してその波形の各山部の斜面に、該山部の長さ方向に所要の間隔をおいて複数の切り起こし片13を形成する。これにより、吸音材11の音を吸収する表面積が増大し、しかも、トリム材10と吸音材11との間に波形に対応したボリュームの背後空気層Sが形成される。結果、吸音材11の吸音性能が向上すると共に、背後空気層Sによる吸音効果が得られる。【選択図】図2
VEHICLE INTERIOR TRIM MATERIAL
車両用内装材
2015-11-24
Patent
Electronic Resource
Japanese
European Patent Office | 2019
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