| 초록 |
PET is a good candidate for automobile interior materials because of its excellent physical properties such as heat resistance, lightweight and high mechanical strength. In automobile, it is mainly applied a headliner which is used on ceiling part to absorb and insulate external noise and heat. Natural fiber, PU, PP-GF are commonly used on this headliner parts. Among them, PP-GF reinforced board that is mixed PP on reinforced glass fiber shows high mechanical strength and lightweight. However, PP-GF has some problems like post-deformation after their forming and scattering interior matters when it exposed on Curtain Air Bag test. In this study, we formed PET to uniform cell distribution and made a sheet board through extrusion molding process. We studied their optimum layer composition by stacking samples with various density and thickness. |
