| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a packaging container that can release gas generated from contents, has high heat insulating performance and strength and can reduce manufacturing costs.SOLUTION: The packaging container comprises: a first trunk part 110 that is cylindrically formed by rounding a first sheet material and overlapping and adhering both side edges thereof; a second trunk part 120 that is cylindrically formed by rounding a second sheet material and overlapping and adhering both side edges thereof and inserted into inside of the first trunk part; and a bottom part 130 and a lid part 140 that respectively seal two opening ends of the second trunk part. A bottom part-side opening end of the first trunk part is folded inward to form a bottom-side inner curl, and a bottom part-side opening end of the second trunk part is folded outward to form a bottom part-side outer curl. The bottom part is adhered to the whole periphery of the bottom part-side outer curl in a peripheral edge part of one surface and adhered to at least part of the bottom part-side inner curl in the other peripheral edge part. At a part leading to an inner wall of the packaging container is provided with a film member 3 having an anti-backflow function capable of exhausting gas to the outside of the container.</p> |
