Effects of Fiber Mass Fractions on the Properties of Plant-Fiber-Reinforced PP Composites with Sandwich Structures for Automotive Interiors
Bamboo fiber(BF)/polypropylene(PP)composite boards and bast fiber(JF)/PP composite boards were used as the surface layers,polyurethane(PUR)foams were used as the core layers,the plant fiber/PP composites with sandwich structures were prepared by hot press processing.The properties of these composites with different fiber mass fractions were tested and characterized by a universal mechanical testing machine,a thermal conductivity tester and a sound absorption coefficient tester with standing wave tube.The results show that the mechanical properties of BF/PP composites with PUR sandwich structures are similar to those of JF/PP composites with PUR sandwich structures,their thermal conductivities are no more than 0.044 W/(m·K),their sound absorption performances are great,and their combustion speeds are no more than 20.28 mm/min,all the parameters satisfy the requirements of car makers for materials used inautomotiveinteriorcomponents.Moreover,whenthemassfractionofplantfiberis40%,theplantfiber/PPcomposite with a PUR sandwich structure has the best comprehensive performances.
Plant FiberSandwich StructureCompositeFiber Mass FractionPolypropylenePolyurethane FoamAutomotive Interior Component
万方数据
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