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发明公开
CN101999145A 复合吸音结构体 有权

复合吸音结构体
摘要：
本发明涉及将表皮层(流动阻力为3.5×105～7×106N·sec/m4)与以高分子纤维系多孔材料为主体的母材层(流动阻力为0.5×104～3.5×104N·sec/m4)复合一体化而成的复合吸音结构体，复合体的单位面积流动阻力为1×104～7×104N·sec/m4，其中，表皮层是将一层以上的等效单纤维直径为11～35μm的聚酯、聚乙烯、尼龙等高分子材料的无纺布重叠而形成的。
摘要（英）：

A sound-absorbing composite structure obtained by combining and uniting a skin layer constituted of one layer or two or more superposed layers of a nonwoven fabric comprising a polymeric material, e.g., a polyester, polyethylene, or nylon, and having a diameter of 11-35 [mu]m in terms of equivalent single-fiber diameter (flow resistance, 3.5105 to 7106 Nsec/m4) with a base layer consisting mainly of a porous material constituted of polymer fibers (flow resistance, 0.5104 to 3.5104 Nsec/m4). This composite has a unit-area flow resistance of 1104 to 7104 Nsec/m4.

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