| 摘要 |
PURPOSE:To form a sticking part of an envelope efficiently and reliably, by a method wherein a surface layer, rearside layer and end face of one side of a laminated sheet are stick together by coating them with a sealing tape, a surface layer and rearside layer of the sheet are stuck together and the rearside layer of the sheet and the rearside layer of the tape of a piled up part are stuck together. CONSTITUTION:A laminated sheet 5 is provided with a base material 1 for a packaging material, a surface layer 2 and a rearside layer 4. A sealing tape (a) is stuck to the side of the laminated sheet, the side part of one side is inverted to a surface layer (b) side, a rearside layer (c) and the rearside layer 4 of the laminated sheet 5 for a paper vessel and abutted against each other, the surface layer 2, rearside layer 4 and end face 8 of the laminated sheet 5 for a paper vessel are coated with the sealing tape (a) and stuck together with a heating roll or high-frequency induction heating. Flame treatment of the surface layer 2 of the side part of one side of the laminated sheet 5 for the paper vessel and the rearside layer 4 of the side part of the other side is performed, melted thermally, the side part of the other side is superposed upon the side part of the one side by climbing over the sealing tape (a), an abutting part is pressurized and the part A is stuck together. Adhesion of the abutting part B between the rearside layer 4 of the laminated sheet 5 and the backside layer (c) of the sealing tape (a) is performed with the high-frequency induction heating. |
