The invention discloses a polylactic acid composite board and a preparation method thereof, relates to the technical field of automobile materials, and solves the problems of poor heat resistance and strength of polylactic acid products. The composite board is of a double-layer composite structure composed of a polylactic acid substrate and a basalt fiber/polylactic acid fiber mixed felt board. The molecular weight of the polylactic acid substrate is 100,000-200,000, and the polylactic acid substrate is prepared from the following components in percentage by mass: 70%-85% of polylactic acid, 10%-15% of a flexibilizer POE-g-MAH and 2.5%-5% of an antioxidant; the molecular weight of polylactic acid in the basalt fiber/polylactic acid fiber mixed felt board is 100,000-200,000, and the basalt fiber/polylactic acid fiber mixed felt board is prepared from the following components in percentage by mass: 38%-57% of polylactic acid fiber, 38%-57% of basalt fiber and 5%-8% of an interface compatilizer; the fiber fineness of the polylactic acid fiber monofilament is 8 dtex to 28 dtex; and the fineness of the basalt monofilament fiber is less than or equal to 100 dtex.

    一种聚乳酸复合板材及其制备方法,涉及汽车材料技术领域,解决了聚乳酸产品的耐热性及强度差的问题。复合板材是由聚乳酸基板和玄武岩纤维/聚乳酸纤维混合毡板组成的双层复合结构;聚乳酸基板分子量为10~20万,乳酸基板中包含以下质量含量组分:70%~85%聚乳酸,10%~15%增韧剂POE‑g‑MAH,2.5%~5%抗氧化剂;玄武岩纤维/聚乳酸纤维混合毡板中的聚乳酸分子量为10~20万,玄武岩纤维/聚乳酸纤维混合毡板中包含以下质量含量组分:38%~57%聚乳酸纤维,38%~57%玄武岩纤维,5%~8%界面相容剂;聚乳酸纤维单丝纤维细度为8dtex~28dtex;所述玄武岩单丝纤维细度≤100dtex。


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    Title :

    Polylactic acid composite board and preparation method thereof


    Additional title:

    一种聚乳酸复合板材及其制备方法


    Contributors:
    YANG TIANBO (author) / LUO HAO (author) / FAN XILONG (author) / SUN DONGRUI (author)

    Publication date :

    2023-06-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / 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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