Patent ID: 7776415

Claim:
A stretched-formed multilayer container having excellent oxygen-gas barrier properties formed by stretching a multilayer sheet or a multilayer preform at an area draw ratio of 1.1 to 100 times, said multilayer sheet or said multilayer preform comprising: a layer (a) made of a thermoplastic resin (A); and at least one layer unit of a (bc)/(de) layer unit or a (de)/(bc) layer unit which is arranged on at least one surface of layer (a) with or without an adhesive backing, said (bc)/(de) layer unit or said (de)/(bc) layer unit consisting of: a layer (bc) made of a mixture of a polycarboxylic acid-based polymer (B) and a plasticiser (C); and a layer (de) made of a mixture of a bivalent metal compound (D) and a resin (E), said layer (bc) and said layer (de) being adjacent to each other, said layer (bc) and said multilayer sheet or said multilayer preform having not been subjected to a heating operation that facilitates esterification between hydroxyl groups of the plasticiser (C) and carboxyl groups of the polycarboxylic acid-based polymer (B) in the layer (bc), and said multilayer sheet or said multilayer preform containing a bivalent metal compound (D) so that the chemical equivalent of a bivalent metal in the total amount (Dt) of the bivalent metal compound (D) is 0.2 or more relative to the total amount (Bt) of carboxyl groups contained in the layers (bc) and (de).