Development of Lightweight and High Stiffness 'New KP-Sheet' for Automotive Headliners by Controlling of Glass Fiber Arrangement

摘要

For the development of lightweight and high stiffness KP-Sheet, the effects of glass fiber content and glass fiber arrangement to the thickness direction were studied. The value of the elastic slope increased with increasing of the expansion-molded thickness. Although the moldable thickness limit increased with increasing of glass fiber content, the value of the maximum elastic slope was not enhanced at over 50wt% of the glass fiber content. By controlling the glass fiber arrangement to the thickness direction, the spring back force of glass fibers was enhanced. The thickness of the free expanded KP-Sheet increased more than 30% at the same unit weight. As the result, the elastic slope of a new KP-Sheet became 1.5 times as high as that of an ordinary one.