Hollow foam molding and production method therefor

摘要

A method for producing a hollow foam molding having a thin and uniform wall thickness, including extruding a foamable melt containing a polypropylene resin having an equilibrium compliance Jeo of 0.5 x 10-3 to 1.8 x 10-3 Pa-1 and a swell ratio S w of 2.5 or less and a physical blowing agent through a die (3) to obtain a parison (2) having a softened polypropylene resin foam layer (21), placing the parison in a mold (4), and blowing a gas into the parison to obtain a hollow foam molding having a hardened polypropylene resin foam layer with an apparent density of 0.35 to 0.65 g/cm3.