| 摘要 |
PROBLEM TO BE SOLVED: To provide a crosslinked polyolefinic resin foam excellent in heat resistance and expansion, not suffering cuts in the sheet or pock marks in the surface in the vacuum forming process, and suitable for use as automobile interior materials. SOLUTION: For the formation of the crosslinked polyolefinic resin foam of 35-45% in gel fraction, a foaming resin composition containing a 10-62 wt.% of a linear polyethylene having a low density of 0.915-0.940 g/cm<3> , 30-82 wt.% of a propylene copolymer having a melting point of 125-155 deg.C, 8-15 wt.% of an isotactic homopropylene having a melting point of 155-165 deg.C, and a thermolytic foaming agent, is formed preferably into a sheet, irradiated with an ionizing beam, crosslinked, and then heated for foaming.
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