| 摘要 |
PROBLEM TO BE SOLVED: To facilitate unsealing operation by laminating separably a releasing layer having a cardboard at its outer surface and a polyolefin layer at its inner surface and a sealing layer having a glassine in its inner surface and a release layer in its outer surface, and also having a partial separation layer as a middle layer between a polyolefin layer and a release layer. SOLUTION: An inner sealing material for sealing a bottle opening having a high moisture absorptive content such as coffee packaged therein is formed by laminating in the order of its inner surface, a glassine 16, a polyethylene layer 15, a partial separation layer 18, a plastic film 14, an adhesive layer 13, aluminum foil 12, a release layer 11, a polyethylene layer 23, a hot melt adhesive layer 22, and a cardboard 21. As such, separation work is done between the release layer 11 and the polyethylene layer 23, it results in separation between a sealing layer 1 consisting of the glassine 16, polystylene layer 15, partial separation layer 18, plastic film, adhesive layer 13, aluminum foil 12 and release layer 11 and a release layer 2 consisting of the polyethylene layer 23, hot-melt adhesive layer 22 and cardboard 21. |
