| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-welding method which is easily controllable with simple equipment and a simple method even when a high-speed operation is conducted with the heat-welding time reduced for improvement of the production capacity and improves stably the fastening strength of a heat-welded part, a production method of a disposable underpants and a production method of a package.SOLUTION: In a heat-welding method, a to-be-processed object 1 including a heat-fusible first part and a heat-fusible second part, with the first and second parts composed of the same material with the same thickness, are heated and pressed with at least two heating rolls 22 and 24 in a state where the first and second parts face each other. For the two heating rolls 22 and 24 in heat welding, the heating temperature of one heating roll 22 is different from that of the other heating roll 24.SELECTED DRAWING: Figure 1 |
