INJECTION MOLDED BODY HAVING EXCELLENT BARRIER PROPERTY

摘要

Disclosed is a multilayer injection molded body having a barrier resin composition layer composed of 10-70% by mass of a polyamide resin (A) and 90-30% by mass of a modified polyolefin (B) or the like. In the polyamide resin (A), not less than 70% by mole of the diamine structural unit is derived from metaxylylenediamine, and not less than 70% by mole of the dicarboxylic acid structural unit is derived from a dicarboxylic acid having a molar ratio between an a,?-linear aliphatic dicarboxylic acid having 4-20 carbon atoms and isophthalic acid of 30:70-100:0. Also disclosed is a multilayer injection molded body having a barrier resin composition layer composed of 50-90% by mass of the polyamide resin (A), 2-45% by mass of the modified polyolefin (B) and 2-45% by mass of a polyamide (D) containing no metaxylylene group. Further disclosed is an injection molded body composed of 10-60% by mass of the polyamide resin (A) and 40-90% by mass of a polyolefin (E), wherein at least a part of the polyamide resin (A) is dispersed in a layered state. These molded bodies are excellent in barrier properties.