| 摘要 |
PROBLEM TO BE SOLVED: To improve the heat bondability during the forming operation, and to prevent the flavor or taste of a content from being damaged by removing a monomer component contained in an innermost polyolefin resin layer by blowing hot air. SOLUTION: A sleeve-like gable-top paper container 1 whose body part is heat-sealed is held by a carrying device in a prismatically erected condition. A nozzle part 2 of a hot air blower having an opening part of a sectional area smaller than that of an opening part in the paper container 1 is arranged at the position where the axes of both opening parts are agreed with each other, and both opening parts are close to each other. Hot air heated at a specified temperature is ejected from the nozzle part 2 at a specified air speed, and the paper container 1 is stopped before the nozzle part 2 for a specified period. By blowing hot air, the monomer component in an innermost polyolefin resin layer, i.e., a component which is a factor of the odor or the change in taste is vaporized, scattered and removed.
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