| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulation paper container capable of suppressing formation of a salient-state step on a foam heat insulation layer on a trunk inner peripheral side on a side seam part, with a simple structure.SOLUTION: A heat insulation paper container comprises: a trunk 40 which is obtained by rolling up a blank material having a paper base material layer 20 and a thermoplastic resin layer 30, in which the thermoplastic resin layer 30 is an inner peripheral side; and a bottom part, in which moisture in the paper base material layer 20 is heated and evaporated for foaming the thermoplastic resin layer 30. The trunk 40 has a side seam part 45 formed by laminating a first side end part 41 and a second side end part 44 of the blank material in which the first side end part 41 is an inner peripheral side, and adhering them. The first side end part 41 has an inclination end edge 43a which extends in a plane of the trunk 40, so as to form an angle to an orthogonal direction X orthogonal to an outer peripheral edge of the bottom part, on at least a part from the bottom part to an intermediate area on an upper end of the trunk 40.SELECTED DRAWING: Figure 2 |
