MULTILAYER INJECTION-MOLDED BODY

摘要

PROBLEM TO BE SOLVED: To provide a multilayer injection-molded body which can exhibit oxygen barrier properties and oxygen-absorption performance and causes very little deterioration in strength of an oxygen-absorbing barrier layer as oxygen absorption progresses.SOLUTION: There is provided a multilayer injection-molded body which contains a layer containing a polyamide resin (A) and a layer (B) mainly composed of a polyester resin (B), where the polyamide resin (A) contains 25 to 50 mol% of diamine units containing 50 mo% or more of a specific diamine unit, 25 to 50 mol% of dicarboxylic acid units containing 50 mol% or more of a specific dicarboxylic acid unit and 0.1 to 50 mol% of a specific constitutional unit and the polyester resin (B) contains dicarboxylic acid units containing 0.01 to 15.0 mol% of units selected from sulfophthalic acid units and sulfophthalic acid metal salt units in total and diol units.