| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene resin foam having heat resistance and flexibility required for vehicle interior materials, and a vehicle interior materials prepared therefrom. SOLUTION: The polypropylene resin foam is composed primarily of a propylene-ethylene-butene copolymer, which has a gel fraction of 50-75%, a maximum endothermic peak of 130-145 deg.C in the differential scanning calorimetry (abbreviated to DSC hereunder), a fusing endotherm by the DSC of 300-400μV.s/mg, and an appearent density of 0.04-0.2 g/cm3.
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