| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compound container formed of mostly paper which is not drastically deformed by such a change as the increase or decrease of container inner pressure, does not generate peeling in a fused part, has superior airtight characteristics and is able to recap. SOLUTION: A paper container 110 which is joined with a bottom panel 112 at the inside bottom of a body part 111 made of a laminated material provided with at least a thermoplastic resin layer at the inner face side of the container is placed at a predetermined position in a metal die for injection molding. Melted thermoplastic resin is injected for providing an open peripheral edge frame on the open part 114 at the body top end of the paper container. A pillar shape protective frame 121 is provided on the longitudinal bonded part of the body container inner face side. On a container main body 100 open part having a ring shape protective frame 122 on the bonded part of the body part and the bottom panel, an arch shape thermoplastic resin container top part 200 provided with a discharge hole 210 at its top end is sealed by both heat fusion and physical contact.
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