| 摘要 |
PURPOSE:To bond subject film without exposing an uncoated portion by forming a coating for surface modification, leaving uncoated portion at the tip in the width direction of a substrate film surface and by overlapping another film on the uncoated portion with a supersonic bonding and etc. CONSTITUTION:When the tip of a thermoplastic film (for example; soft polyvinyl chloride film etc.) is bonded, a coating 13 for a film surface modification is formed on one surface of a substrate film 11, leaving an uncoated portion 15 on one side alone in its width direction at the tip of the substrate film 11, and the reverse side of another film 12 is overlapped on the uncoated portion 15 of the film 11, and treated with a supersonic bonding or high-frequency bonding, resulting in the bonding of the tips of thermoplastic resin films. |
