| 摘要 |
PURPOSE:To simplify a manufacturing process, and to prevent the generation of defective sealing by wrapping one edge of the metallic foil of a multilayer sheet in a resin material and superposing the other edge onto the edge. CONSTITUTION:A multilayer sheet 2 is edge-treated first. That is, one edge 2g of the multilayer sheet 2 is heated by a hot air heater 3, and the resin material of the section is softened. The edge 2g of the multilayer sheet 2 heated is pushed by a nip roll 5 arranged faced oppositely to a roll 4 during a time when the sheet 2 is forwarded on the roll 4, and the edge of a metallic foil 2c is wrapped in the resin material at the edge 2g. The edge-treated multilayer sheet 2 is laminated on a rigid layer 6, thus shaping a laminate. Accordingly, the laminate 8 formed is brought to the state in which edges are superposed, and wound spirally on a mandrel, thus shaping a cylindrical body. |
