| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a paper container for a liquid that prevents adhesive strength from being lowered, even by a strongly permeable content, and has no risk that the liquid is leaked by the separation between a barrier layer and a sealant layer on heat welding during form-filling. <P>SOLUTION: In this paper container for a liquid, which is constituted of a packaging material formed by laminating a front resin layer, a paper layer, a barrier layer and a sealant layer in the order, the barrier layer is an inorganic oxide vapor deposited film and has a water resistant coating layer on the vapor deposited layer side, the water resistant coating layer contains (a) at least one type of alkoxide, (b) polyvinyl alcohol resin, (c) ethylene vinyl alcohol copolymer and (d) a silane coupling agent or silane monomer and is a coating of a composition obtained by polycondensation using an alkoxide sol-gel method. An adhesive agent layer is laminated on the sealant layer side of the barrier layer and the adhesive agent layer comprises an isocyanate compound which is a monomer or its derivative having an isocyanate group of at least two functionalities. <P>COPYRIGHT: (C)2013,JPO&INPIT |
