Jsp Corporation

Masayasu Okuda

Masato Naito

Kenichi Takase

Naochika Kogure

Daisuke Imanari

Diasuke Imanari

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 Jof 0.5&#xd7;10to 1.8&#xd7;10Paand a swell ratio Sof 2.5 or less and a physical blowing agent through a die to obtain a parison having a softened polypropylene resin foam layer, placing the parison in a mold, 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/cm.

Method of forming hollow foam moldings

A polylactic acid resin foamed molding obtained by placing in a mold a cylindrical body having a foamed layer, which is formed by extruding a foamable molten resin composition prepared by kneading together a polylactic acid resin and a physical blowing agent from a die into a low-pressure zone, and molding it, wherein

Polylactic acid resin foamed molding and process for manufacturing the same

Provided is a method for manufacturing a foam-molded article by molding between molds a parison with a foam layer formed by extruding an expandable molten resin composition, obtained by melt-kneading a polyethylene resin and a physical foaming agent, to an area of low pressure from a die, wherein the polyethylene resin is selected from those having a melt flow rate of 0.1 to 25 g/10 minutes and a melt tension of not less than 1.5 cN, and wherein the apparent density of the foam layer in the foam-molded article is about 0.04 to 0.3 g/cm.

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Kanuma, Japan

Masayasu Okuda