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Composite building panels with thermoplastic foam core and natural fibers and method and apparatus for manufacturing the same
Composite building panels with thermoplastic foam core and natural fibers and method and apparatus for manufacturing the same
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机译：具有热塑性泡沫芯和天然纤维的复合建筑镶板及其制造方法和装置
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摘要
The substrate (1A) thermoplastic foam core (2) is bonded to a first outer layer (3) comprising thermoplastic and natural fibers. Bonded to the core, opposite the first layer, a second outer layer (4) comprises a second thermoplastic with second natural fibers. An Independent claim is included for the method of manufacture, comprising a series of preheatings and hot pressure laminations, followed by cooling. A further independent claim covers the equipment used to carry out the process. Preferred features: Plastic layers and foam comprise the same plastic. The natural fibers are gambo (kenaf). They are embedded in the plastic material of the outer layers. Polyolefin fibers may also be included. Natural fibers amount to 30%-70% of the outer layers. Outer layers are thermally-fused to the core. It is specified that no glass fibers, no polyurethane, no epoxy resin and no adhesive shall be included. The core foam, in polypropylene, is air-permeable. Its density is 800-900 g/m2. The thickness of the core is 4-8 mm. It is sufficiently rigid to be self-supporting and dimensionally-stable. A covering panel (5) is placed on the second, outer layer. This is either a textile fabric, e.g. a knit, or else a synthetic film. It has a polyolefin backing, bonded to the second outer layer. The composite has a three-dimensional (6), contoured, dimensionally-stable configuration. A trilayer variant is described. Significant features of the method include controlled cooling time and an outer layer preheating temperature of 180 - 200 degrees C. Core preheating temperature is 40 - 100 degrees C. Outer layers are precompressed before bonding.
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机译：基底（1A）热塑性泡沫芯（2）结合到包括热塑性和天然纤维的第一外层（3）。第二外层（4）结合到与第一层相对的芯上，包括具有第二天然纤维的第二热塑性塑料。该制造方法包括独立权利要求，包括一系列预热和热压层压，然后进行冷却。另一个独立的权利要求涉及用于执行该过程的设备。优选特征：塑料层和泡沫包含相同的塑料。天然纤维是甘波（洋麻）。它们嵌入在外层的塑料材料中。也可以包括聚烯烃纤维。天然纤维占外层的30％-70％。外层热熔合到纤芯。规定不包括玻璃纤维，聚氨酯，环氧树脂和粘合剂。聚丙烯中的芯泡沫是透气的。其密度为800-900g / m 2。芯的厚度是4-8mm。它具有足够的刚性，可以自支撑并且尺寸稳定。覆盖板（5）放置在第二外层上。这是一种纺织面料，例如针织物或人造膜。它具有粘合到第二外层的聚烯烃背衬。复合材料具有三维（6）轮廓，尺寸稳定的配置。描述了三层变体。该方法的重要特征包括受控的冷却时间和180-200摄氏度的外层预热温度。纤芯预热温度为40-100摄氏度。外层在粘合之前进行预压缩。
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