| abstract |
A method for manufacturing a multilayer container having a layer containing a polyester resin as a main component and a layer containing a polyamide resin as a main component, the method for manufacturing a multilayer container in which delamination hardly occurs. Biaxial stretching blow molding of a preform having a polyester resin layer and a polyamide resin layer, wherein the storage modulus G' of the polyamide resin is 5 MPa or more and less than 100 MPa, the moisture content of the polyamide resin layer is 0.5% or less, In the amide resin, 70 mol% or more of diamine-derived structural units are derived from metaxylylenediamine, and 80 to 97 mol% of dicarboxylic acid-derived structural units are α,ω-straight-chain aliphatic dicarboxylic acids having 4 to 8 carbon atoms. A method for producing a multilayer container, wherein 20 to 3 mol% of the xylylenediamine-based polyamide resin is derived from the main acid and derived from the aromatic dicarboxylic acid. |