INJECTION MOLDED PRODUCT COMPRISING PROPYLENE BASED RESIN COMPOSITION AND METHOD OF IMPROVING RESISTANCE TO STEAM PERMEATION OF INJECTION MOLDED PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a molded product suitable for use in the electrolytic cell of a secondary battery such as a lithium ion battery and comprising a propylene based resin composition and a method of improving resistance to steam permeation of an injection molded product.SOLUTION: An injection molded product is formed by injection-molding a propylene based resin composition containing 70-95 wt.% propylene based resin (A) and 5-30 wt.% aluminum powder (B), wherein the aluminum powder (B) has a flake-like shape and has 3-100 μm average particle diameter, 0.1-10 μm average thickness and an aspect ratio of 1-100, steam permeation resistance of the injection molded product is ≤0.03 g/mday measured in a 2 mm thick flat plate. A method of improving trsistance to steam permeation of the injection molded product or the like is provided.