Injection molded body having excellent barrier property

摘要

The present invention relates to a multilayer injection molded article comprising a layer of a barrier resin composition including (A) 10 to 70% by mass of a polyamide resin including a diamine constitutional unit 70 mol% or more of which is derived from m-xylylenediamine and a dicarboxylic acid constitutional unit 70 mol% or more of which is derived from a dicarboxylic acid containing a C 4 to C 20 ±,É-linear aliphatic dicarboxylic acid and isophthalic acid at a molar ratio of from 30:70 to 100:0, (B) 90 to 30% by mass of a modified polyolefin, and the like; a multilayer injection molded article including a layer of a barrier resin composition including (A) 50 to 90% by mass of the above polyamide resin, (B) 2 to 45% by mass of the modified polyolefin and (D) 2 to 45% by mass of a m-xylylene group-free polyamide; and an injection molded article including (A) 10 to 60% by mass of the polyamide resin and (E) 40 to 90% by mass of a polyolefin wherein at least a part of the polyamide (A) is dispersed in a layered state. These molded articles are excellent in barrier property.