| 摘要 |
PROBLEM TO BE SOLVED: To provide a paper cup container having a cylindrical barrel formed of a laminate sheet comprising at least paper of a base, a barrier layer and a sealant layer laminated in this sequence and having a bottom formed under the barrel, which can seal contents having a tendency of penetrating or being absorbed into the sealant layer and safely store the contents without separation of the sealant layer after a three-month storage test at 40°C. SOLUTION: The laminate sheet for use of a blanking plate to be used to mold the barrel and the bottom of the paper cup container is formed by successively laminating at least paper, an adhesive layer, the barrier layer, an AC layer and a polyolefin-based resin layer. In addition, the AC layer is formed into a thickness of 0.1-2μm by applying, on a barrier layer surface, an aqueous dispersion liquid in which a polyolefin copolymer resin containing unsaturated carbonic acid or its anhydride by 0.01-5 mass% is dispersed with a number average particle diameter of 1μm or less without using a nonvolatile aqueous auxiliary agent. The polyolefin-based resin layer is laminated by an extrusion coating or extrusion laminating method on the AC layer. COPYRIGHT: (C)2009,JPO&INPIT |
