METHOD FOR MANUFACTURING DOUBLE CONTAINER AND DOUBLE CONTAINER

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a double container and a double container capable of preventing a failure in peeling an inner layer body and deformation of an outer layer body by facilitating the peeling of the inner layer body from the outer layer body, and introducing ambient air between the inner layer body and the outer layer body when a content is discharged.SOLUTION: A method for manufacturing a double container provided with a bottle-like outer layer body 2 and an inner layer body 3 laminated inside the outer layer body 2 so as to be peeled includes: a molding process for blow molding laminate parison and forming an outside air introduction hole 4 in the outer layer body 2; a peeling process for peeling the inner layer body 3 from the outer layer body 2 after the molding process; a pressing process for deforming the outer layer body 2 at least temporarily by applying pressing force from outside of the outer layer body 2; and a restoration process for restoring the inner layer body 3 toward the deformed outer layer body 2.