| 摘要 |
PROBLEM TO BE SOLVED: To enhance the productivity of a biaxially oriented thermoplastic resin film by simultaneously stretching a plurality of films by one stretching machine. SOLUTION: Two or more thermoplastic resin unstretched films are superposed one upon another to be simultaneously guided to a biaxially stretching tenter to be biaxially stretched at the same time and the start stretching speeds of the films are set to 10,000%/min or more in respective directions. By this constitution, even if a plurality of the films are stretched at the same time by one stretching machine, the films can be peeled without being sticked mutually and productivity can be largely enhanced. |
