POLYPROPYLENE RESIN FOAMED MOLDED OBJECT

摘要

PROBLEM TO BE SOLVED: To provide a polypropylene resin foamed molded object lightweight, and having depth and excellent rigidity. SOLUTION: The polypropylene resin foamed molded object is obtained by molding a foamed sheet comprising a polypropylene resin and has a density of 100-200 kg/m3, opening parts with a size of 100-170 mm and a height of 50-80 mm. The thickness and cell shape of the molded object at a 1/2 height position satisfy formula (1) : 1 mm≤thickness≤2.5 mm, formula (2) : 5≤N1≤15 and formula (3) 1≤N1/N2≤3.5 (wherein N1is the average number of cell walls/mm in a thickness direction and N2is the average number of cell walls/mm in the direction vertical to the thickness direction). COPYRIGHT: (C)2004,JPO&NCIPI