| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a production method of an optical film capable of reducing an inferior quality such as a folded line caused by crease inside an optical film roll generated at the winding time or with the passage of time, when a drawn optical film is produced.SOLUTION: In a production method of an optical film obtained via a drawing step and a take-up step by being molded by using a thermoplastic resin containing a specific acrylic polymer, it is found that the problem can be solved by passing through the take-up step in which the temperature of a touch roll is adjusted as much as 10°C or higher and 20°C or lower by using a winder having the touch roll capable of winding, while pressing the optical film.</p> |
