PRODUCTION METHOD OF STRETCHED FILM AND EMULSION COMPOSITION FOR FORMING CURED FILM

PROBLEM TO BE SOLVED: To provide a production method of a stretched film, capable of providing the stretched film in which generation of crack or the like in a cured film can be suppressed and which can maintain transparency even under a humidity heat environment.SOLUTION: The production method of a...

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Hauptverfasser:	MARUYAMA YASUTOMO, INOUE AKIHISA, WADA MITSUHIRO, TONSHO SHINJI, KAWASHIMA NAOYUKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a production method of a stretched film, capable of providing the stretched film in which generation of crack or the like in a cured film can be suppressed and which can maintain transparency even under a humidity heat environment.SOLUTION: The production method of a stretched film is provided that comprises an uniaxial or biaxial stretching strep. The production method of a stretched film further comprises a step of coating a substrate film surface with an emulsion composition before or during the stretching strep, the emulsion composition contains a polyfunctional (meth)acrylate compound, an emulsifier and an azo-based radical initiator, 10-hr. half-life temperature of the azo-based radical initiator is over 65°C. The content of the azo-based radical initiator in the emulsion composition is preferably 0.1 mass% to 5 mass% in terms of a solid component.SELECTED DRAWING: None 【課題】硬化膜におけるクラック等の発生を抑制でき、かつ湿熱環境下においても透明性を維持できる延伸フィルムを得ることができる延伸フィルムの製造方法の提供を目的とする。【解決手段】本発明は、一軸又は二軸延伸工程を有する延伸フィルムの製造方法であって、上記延伸工程前又は途中に、エマルジョン組成物を基材フィルム表面に塗工する工程を備え、上記エマルジョン組成物が、多官能（メタ）アクリレート化合物と、乳化剤と、アゾ系ラジカル開始剤とを含有し、上記アゾ系ラジカル開始剤の１０時間半減期温度が６５℃を超えることを特徴とする。上記エマルジョン組成物における上記アゾ系ラジカル開始剤の含有量は、固形分換算で０．１質量％以上５質量％以下が好ましい。【選択図】なし