| 摘要 |
PROBLEM TO BE SOLVED: To produce a film without pore transfer and free from a wrinkle, a scratch or the like. SOLUTION: A tension controlling section 40 for controlling tension applied to a TAC film 12 is installed on a transporting path of a film forming apparatus. The tension controlling section 40 is composed of a suction drum 42 for sucking and transporting the TAC film 12 and a dancer mechanism 43 (a dancer roller 51). Film sucking force by the suction drum is set in a range of 0.005-0.1 N/cm<SP>2</SP>. The load applied on the dancer roller 51 is set so that the difference of the tension between the front and the rear parts of the suction drum 42 falls within a range of 0-100 N/m when the surface temperature of the TAC film 12 is not lower than 50°C, and the difference of the tension falls within a range of 0-500 N/m when the surface temperature of the TAC film is below 50°C. In this way, pore transfer, the wrinkle, the scratch or the like are prevented from being caused on the TAC film during transportation. COPYRIGHT: (C)2006,JPO&NCIPI |
