| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyolefin resin in-mold foamed molding, which is an in-mold foamed molding with a thin-walled shape, having excellent surface property, moldability and dimention property, and a production method thereof. SOLUTION: Two types of polypropylene resins with a melting point temperature difference of 15°C or higher and 30°C or lower are mixed to make a polypropylene resin with a melt index of 3 g/10 min or more and 20 g/10 min or less, and a melting point of 130°C or higher and 155°C or lower. A polypropylenic resin prefoamed particle of the polypropylene resin as a base resin with an expansion ratio of 10 times or more and 50 times or less, two melting points in measurement by a differential scanning calorimetry method, and a difference in the melting points of 20°C or higher is in-mold foaming molded at a heated steam pressure of 3.0 kgf/cm<SP>2</SP>-G or lower. COPYRIGHT: (C)2011,JPO&INPIT
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