The invention discloses an automobile roof material and a preparation method thereof, and belongs to the technical field of automobile parts. The material sequentially comprises a decorative layer non-woven fabric, an upper polymer hot melt adhesive film layer, an upper rubber powder layer, an upper modified ramie fiber felt, a foamed PU plate layer coated with EVA hot melt adhesive on the upper surface and the lower surface, a lower modified ramie fiber felt, a lower rubber powder layer and a lower polymer hot melt adhesive film layer from top to bottom; the modified ramie fiber felt is a ramie fiber felt modified by a cationic modifier and thermosetting resin; According to the invention, the ramie fiber is subjected to cationic modification, so that the toughness of the ramie fiber can be remarkably enhanced, and then the ramie fiber is coated with the thermosetting resin, so that the hardness of the ramie fiber is improved, and hardness reduction caused by toughness enhancement is avoided; After the modified ramie fiber is compounded with the foamed PU plate, the hardness, impact toughness and bending strength of the obtained composite material can be remarkably enhanced, and the problem that layers are easily separated in the using process is solved.

    本发明公开了一种汽车顶棚材料及其制备方法,属于汽车配件技术领域,所述材料自上而下依次包括如下结构:装饰层无纺布、上层高分子热熔胶膜层、上层胶粉层、上层改性苎麻纤维毡、上下面涂覆EVA热熔胶发泡PU板层、下层改性苎麻纤维毡、下层胶粉层和下层高分子热熔胶膜层;所述改性苎麻纤维毡为经阳离子改性剂和热固性树脂改性后的苎麻纤维毡;本发明通过对苎麻纤维进行阳离子改性后能显著增强其韧性,之后涂覆热固性树脂,改善苎麻纤维的硬度,避免了因韧性的增强而导致硬度的下降;将改性后的苎麻纤维与发泡PU板复合后,能够使所得复合材料的硬度、冲击韧性和抗弯曲强度显著增强,避免了使用过程层与层之间易发生分离的问题。


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    Title :

    Automobile roof material and preparation method thereof


    Additional title:

    一种汽车顶棚材料及其制备方法


    Contributors:
    LI JIFENG (author) / DU ZHAOFANG (author) / GU DIANKUAN (author) / HU CHAOFAN (author) / WANG HAO (author) / CHEN WEI (author)

    Publication date :

    2021-06-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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