| 摘要 |
PURPOSE:To improve the unsealability, heat sealing strength and physical strength of the packaging material by using a biaxially stretched film, a biaxially stretched film deposited by evaporation with a thin metallic film and an extrusion laminated heat sealing layer in combination. CONSTITUTION:The packaging material is formed by laminating, for example, the biaxially stretched thermoplastic resin film 4 which consists of a biaxially stretched thermoplastic film 1 and a thin metallic film deposition layer 3 and is deposited with the thin metallic film on the film 1 via an adhesive agent layer 2 and further laminating the extrusion laminated heat sealing layer 6 of a polyolefin resin via an under coating layer 5 on the film 4. Polyethylene or cellophane is usable for the film 1 of the outermost layer. Nylon, etc., are usable for the film 1 of the film 4 and a vapor deposited Al film, etc., are usable for the layer 3. Branched low-density polyethylene of a high pressure method, etc., are usable for the layer 6. |
