| 摘要 |
PURPOSE:To provide the composition using clean carbon dioxide as a foaming agent and capable of readily and safely giving highly foamed products at a low pressure by impregnating a resin composition comprising a thermoplastic resin and a specific porous material with the inorganic gas. CONSTITUTION:(A) A resin composition comprising (i) 100 pts.wt. of a thermoplastic resin (e.g. polyethylene, polypropylene, 6 nylon), (ii) 5-100 pts.wt. of a porous material (e.g. zeolite, silica gel) having an average particle diameter of <=500mum (preferably 100mum) and, if necessary, a filler and an antioxidant is charged in a pressure container, and the container is filled with (B) an inorganic gas, followed by heating and pressing the charged materials at a temperature above the softening point of the component (i) to obtain the objective composition. |
