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2. 发明申请

US20090298374A1 Acoustic Composite and Twin-Shell Lightweight Trim Part Comprising Such a Composite 审中-公开
标题翻译：声学复合材料和双壳轻质修剪件，包括这种复合材料
公开(公告)号：US20090298374A1
公开(公告)日：2009-12-03
申请号：US12297814
申请日：2007-04-23
申请人： Bertrand Delmas
发明人： Bertrand Delmas
IPC分类号： B32B5/24 , B32B3/26 , B32B7/08 , B60R13/08
CPC分类号： B32B7/08 , B32B5/022 , B32B5/08 , B32B5/18 , B32B5/245 , B32B5/26 , B32B2262/0253 , B32B2262/0276 , B32B2262/101 , B32B2262/12 , B32B2262/14 , B32B2266/0207 , B32B2266/025 , B32B2266/0292 , B32B2266/08 , B32B2307/102 , B32B2307/51 , B32B2307/718 , B32B2605/003 , B60R13/08 , Y10T428/249953 , Y10T428/249981 , Y10T442/652
摘要： A twin-shell lightweight acoustic trim part (11), in particular a self-supporting vehicle's headliner or a rear parcel shelf comprises a thermoplastic acoustically effective structural composite (5). This composite comprises at least three layers (2, 3, 4), in particular on its front side a skin layer (4), preferably a binder layer made of a thermoplastic non-woven or grid, a stiffening layer (3) made of a non-woven comprising polypropylene and glass fibres, and on its rear side a soft layer (2) consisting of a polyolefin foam. These layers are needle-punched together in order to set a desired airflow resistance R in the range of 200 Nsm−3 to 5000 Nsm−3. In a preferred embodiment, the twin-shell lightweight acoustic trim part (11) comprises a core layer (8) which contains 50 parts of elastomeric foam sticks, 20 parts of glass fibres, 10 parts of polypropylene fibres material, and 20 parts bicomponent polyester fibres and preferably comprises additional 15% of recycled elastic foam material. This trim part is designed such that the thermoplastic bonded and acoustically effective structural composite (5) allows to absorb the uneven pressure forces of the elastomeric foam material (9) of the core layer (8) in order to achieve a smooth and soft touch feeling.
摘要翻译：双壳轻型音响装饰件（11），特别是自支撑车辆的顶篷或后包裹架包括热塑性声学有效的结构复合材料（5）。该复合材料包括至少三层（2,3,4），特别是在其前侧具有表层（4），优选由热塑性无纺布或网格制成的粘合剂层，由一种包括聚丙烯和玻璃纤维的无纺布，在其背面上由聚烯烃泡沫构成的软质层（2）。这些层被针刺在一起，以将所需的气流阻力R设定在200Nsm-3至5000Nsm-3的范围内。在优选实施例中，双壳轻型声学修整部件（11）包括芯层（8），其包含50份弹性泡沫棒，20份玻璃纤维，10份聚丙烯纤维材料和20份双组分聚酯纤维，并且优选地包含额外的15％的再循环弹性泡沫材料。这种装饰部件被设计成使得热塑性粘合和声学有效的结构复合材料（5）允许吸收芯层（8）的弹性体泡沫材料（9）的不均匀的压力，以实现平滑和柔软的触感。

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