| 摘要 |
PROBLEM TO BE SOLVED: To provide a double container capable of preventing poor peeling of an inner layer body and deformation of an outer layer body in pouring out the contents by making the inner layer body easily peelable from the outer layer body.SOLUTION: A double container comprises an outer layer body 2 which is provided with a cylindrical spout 2a and a trunk part 2b connected to the spout 2a and has an air inflow hole 4 penetrating the spout 2a in the inward and outward directions and arranged in the side part of the spout 2a and an inner layer part 3 which is provided with an opening part 3a connected to the open end of the spout 2a and a containing part 3b containing the contents, connected to the opening part 3a and housed in the outer layer body 2. In the trunk 2b of the outer layer body 2, an outer layer side protrusion part 5 is formed, and an inner surface of the outer layer side protrusion 5 facing the side of the inner layer body 3 has an undercut-shaped longitudinal section in the direction along the axial center of the spout 2a. In the inner layer body 3, an inner layer side protrusion 6 having a shape of the longitudinal section corresponding to the inner surface of the outer layer side protrusion 5 is provided, and a clearance is formed between the outer layer side protrusion and the inner layer side protrusion. |
