| 摘要 |
PROBLEM TO BE SOLVED: To provide an inner package bag which is excellent in cost, which has no seal part which becomes a drawback when using a film material, which can be used for a high clean product, which allows reuse of an external container after discarding the inner package bag, with low risk of leakage, the inner package bag being a seal type liner, and a production method thereof.SOLUTION: The production method of the inner package bag is configured to: mold PP or PET into a preform body 1 of 100 g-1500 g, by injection molding; when expanding the preform body 1, heat the preform body for 60-80 seconds at 90-120°C; after softening the preform body 1, use an external container 3 as a mold; blow gas to inside of the softened preform body 1, thereby forming the inner package bag whose shape matches a shape of the external container 3.SELECTED DRAWING: Figure 3 |
