| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing a foam blow-molded article of polypropylene-based resin by which foaming properties and blow-moldability of a foamed parison are improved compared to the conventional production methods, and a molded article having high uniformity of wall thickness over a wide range of density is obtained as a result.SOLUTION: The method for producing a polypropylene-based resin foamed blow-molded article comprises: kneading a polypropylene-based resin with a physical foaming agent; extruding thus obtained foamable resin melt through a die to obtain a soft foamed parison; and inserting the foamed parison in a mold and then blow-molding the same. The method is characterized in that the polypropylene-based resin comprises a polypropylene-based resin (A) satisfying specific requirements (1)-(3) and a polypropylene-based resin (B) satisfying a specific requirement (4), each in measuring dynamic viscoelasticity imparting a vibration strain at 190°C, and the mixing ratio by weight (A:B) of the resin (A) to the resin (B) is in the range of 100:0.5 to 100:5. |
