| 摘要 |
PROBLEM TO BE SOLVED: To provide foamable thermoplastic resin particles containing a foaming agent in an ionomer resin, which are difficult to produce by conventional techniques. SOLUTION: The foamable thermoplastic resin particles comprises making a thermoplastic resin includes a foaming agent, the thermoplastic resin having an olefin based resin in a main chain and an ionic dissociation group in the main chain or a side chain, wherein by differential scanning calorimetry on the thermoplastic resin, an endothermic peak originating from an ion crosslinking moiety and an endothermic peak originating from the olefin based resin as the main chain are detected. The thermoplastic resin of the foamable thermoplastic resin particles is in a state where when the thermoplastic resin is rapidly cooled after heating to a temperature not less than the endothermic peak temperature originating from the olefin based resin, the endothermic peak originating from the ion crosslinking moiety is not detected or an endothermic peak originating from the ion crosslinking moiety, which is lower than the endothermic peak originating from the ion crosslinking moiety in the thermoplastic resin before heating is detected. COPYRIGHT: (C)2011,JPO&INPIT |
