| 摘要 |
<p>PURPOSE: To stably conduct a releasing processing for an inner layer and an outer layer and a restoring processing for the inner layer without forming an adhesive layer, reduce a variation of an amount of a content in a fully loaded state, stabilize the shrink state of the inner layer when the content is poured out, and reduce and stabilize a residual amount. CONSTITUTION: A thick-wall part 4 is formed in either or both of a releasable inner layer 3 and an outer layer 2. In this manner, the thick-wall part 4 has a difference in releasability from the other part to become a low-releasable part, an unreleased part remains at the releasing processing of the inner layer for restricting an air flow to be pressurized from a vent hole, and the release state of the inner layer at the releasing processing of the inner layer and the restoring state at the restoring processing can be stabilized.</p> |
