METHOD FOR MANUFACTURING OPTICAL FILM

• Main Authors: TOMOYOSE RYUTA, KONDO SEIJI, SAIJO YUKIO
• Format: Patent
• Language: English; Japanese
• Published: 07.05.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a method capable of completing subjecting a film roll including a polarizer to humidification in a relatively short time.SOLUTION: A method for manufacturing an optical film capable of controlling humidity by humidifying a film roll 1 including a polarizer comprises spraying water vapor having a temperature of 35°C or more and a humidity of 80% RH or more at a pressure of 0.5 kPa or more on the film roll 1 including the polarizer, for example, competing the tension of the film roll 1 and the spray pressure of the water vapor by spraying the water vapor on the film roll 1 from the arc surface part 711 of a spray part 7 to convey the film roll 1 along the arc surface part 711 while separating from the arc surface part 711.SELECTED DRAWING: Figure 8 【課題】 偏光子を含むフィルム原反に対して比較的短時間で加湿処理を完了できる方法を提供する。【解決手段】 偏光子を含むフィルム原反１を加湿することにより、調湿された光学フィルムを製造する方法であって、前記偏光子を有するフィルム原反１に対して、３５℃以上且つ８０％ＲＨ以上の水蒸気を、０．５ｋＰａ以上の圧力で吹き付ける。例えば、前記水蒸気を吹付け部７の弧状面部７１１から前記フィルム原反１に吹き付けることにより、前記フィルム原反１の張力と前記水蒸気の吹き付け圧力が拮抗して、前記フィルム原反１は前記弧状面部７１１から離れつつ前記弧状面部７１１に沿って搬送される。【選択図】 図８