abstract |
PROBLEM TO BE SOLVED: To provide a production method for obtaining an olefin-based thermoplastic elastomer foam with constant quality using carbon dioxide as a foaming agent. SOLUTION: A molten olefin-based thermoplastic elastomer composition in which 0.1 to 30 parts by weight of carbon dioxide is added per 100 parts by weight of a specific olefin-based thermoplastic elastomer, and the olefin-based thermoplastic elastomer and carbon dioxide are compatible. And a cooling step of lowering the temperature of the molten olefin-based thermoplastic elastomer composition. |