| 摘要 |
PURPOSE:To make it possible to tear off a packaging body for thermal autoclaving using a nylon film being excellent in impact resistance, easily, linearly and in all directions by hands, without providing an unpacking assist member additionally. CONSTITUTION:In regard to a packaging material for thermal autoclaving prepared by laminating a biaxially stretched polypropylene film 1, a nylon film 2 and a heat-sealing resin layer 3 sequentially, a biaxially stretched film constituted of aromatic polyamide and 6-nylon is used as the nylon film 2. Lamination is made, on the occasion, so that the direction of a stretching axis in which the tearing property of the biaxially stretched polypropylene film is inferior coincides with the stretching direction in which the tearing property of the nylon film is excellent. It is preferable, besides, that a gas barrier layer is provided further between the nylon film 2 and the biaxially stretched polypropylene film 1 or the heat-sealing resin layer 3. As for the gas barrier layer, a layer constituted of an aluminum leaf, polyvinylidene chloride or a silicon oxide can be used. |
