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首页> 外文期刊>JFE technical report >Composite Material for Automotive Headliners--Expandable Stampable Sheet with Light Weight and High Stiffness
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Composite Material for Automotive Headliners--Expandable Stampable Sheet with Light Weight and High Stiffness

机译：汽车顶篷用复合材料-重量轻，刚度高的可膨胀压印板

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摘要

KP Sheet is a stampable sheet made of glass fiber (GF) and polypropylene (PP), and has a distinctive characteristic of expansion in thickness. To realize light weight and high stiffness in automotive headliners, the GF content and arrangement in the thickness direction were studied with the aim of increasing expansivity. Although expansivity increases with GF content and the elastic slope is enhanced by the resulting increase in sheet thickness, the maximum elastic slope reaches saturation at a GF content of 50 mass percent or more. Therefore, the GF arrangement in the thickness direction is controlled to improve GF spring back, resulting in a 30 percent improvement in expansivity at the same unit weight. A newly-developed ultra-light product (UL grade) realizes a high elastic slope of 7.2 N/mm at a web unit weight of 800 g/m2, while also displaying excellent moldability and dimensional stability equal to those of normal grade KP Sheet, enabling further weight reduction.
机译：KP Sheet是一种由玻璃纤维（GF）和聚丙烯（PP）制成的可压模薄片，具有厚度膨胀的独特特征。为了实现汽车顶棚的轻量化和高刚度，研究了GF的含量和厚度方向的布置，以提高膨胀性。尽管随着GF含量的增加，膨胀性增加，并且由于片材厚度的增加，弹性斜率增加，但是当GF含量为50质量％以上时，最大弹性斜率达到饱和。因此，通过控制厚度方向上的GF排列，可以改善GF的回弹，在相同的单位重量下，可膨胀性提高30％。新开发的超轻产品（UL级）在网幅单位重量为800 g / m2时实现7.2 N / mm的高弹性斜率，同时还具有与普通KP Sheet相同的出色成型性和尺寸稳定性，使重量进一步减轻。

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