| 摘要 |
PURPOSE:To enable manufacturing of a film whose recovery properties are favorable, physical properties do not deteriorate and facial forms on both sides are different from each other, by a method wherein after stretching or thermal fixation of a plurality of plastic films has been performed by superposing them each other, they are peeled off from each other. CONSTITUTION:The title method is constituted so that co-stretching and thermal fixation are performed under conditions where both films do not fuse together, they are peeled off from each other finally and facial properties at an interface side are changed from those at a noninterface side, in superposition of both the films. It becomes that while the interface side is not modified at all or modified a little, the noninterface side is modified drastically and a plastic film whose both side forms are different from each other is obtained. The plastic film to be manufactured is suitable for a film composed of polyester or polyamide. In addition, at the time of superposition of a plurality of the films, they may be either the same kind or different in kind. Stretching conditions, thermally fixing conditions and peeling conditions become different according to the plastics to be used. |
