| 摘要 |
PROBLEM TO BE SOLVED: To obtain a foam having improved heat resistance, solving a bleedout problem in sheet formation, causing neither heat burn in high-temperature expansion nor discoloration, having excellent long-term heat resistance. SOLUTION: This olefin-based resin foam has closed cells, contains 0.05-1.0 wt.% of a hindered phenol-based antioxidant having >=150 deg.C melting point such as 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane, etc., and preferably further 0.05-1.0 wt.% of a thioether-based antioxidant having >=500 molecular weight such as didodecyl thiodipropionate, etc.
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