| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide material roll for a passage closing material for a laminate tube which has excellent drawability and openability, and prevents delamination caused by woozing of a strong alkaline substance. <P>SOLUTION: A material roll 10 for the passage closing material for a laminate tube container is obtained by sequentially laminating a polyolefin-based resin film 1, a biaxially oriented polyester film 2, a metal foil 3, an ethylene-carboxylic acid copolymer resin 4 and a polyolefin-based resin 5 which are laminated through extrusion laminate, and a coextruded oriented film 6 having a layer structure of at least polyolefin-based resin film 7, from the outer layer to the inner layer, when forming the passage closing material. <P>COPYRIGHT: (C)2012,JPO&INPIT |
