| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyolefinic resin bridged foaming substance the surface of which is flat and smooth, and excellent in compression property. SOLUTION: A polyolefinic resin bridged foaming substance and a preparation method thereof comprise: after forming a foaming substance obtained by introducing a foaming resin composition which consists of a polyolefinic resin composition capable of bridging by electron beam irradiation added with an additive obtained by adsorbing and carrying a liquid substance having boiling point of 130-160 deg.C on a porous-structured powder and a heat-decomposable foaming chemical, into an extruder set around the boiling point of the liquid substance and at a lower temperature than that of the decomposition of the heat- decomposable foaming chemical, bridging it by irradiation of electron beam followed by foaming by introducing into a foaming apparatus set at 10-50 deg.C higher temperature than that of decomposition of the heat-decomposable foaming chemical. |
