METHOD FOR MEASURING PEELING STABILITY OF RELEASE FILM AND RELEASE FILM LAMINATE

To provide a method for measuring peeling stability of a release film with high degree of reliability and accuracy.SOLUTION: A method for measuring peeling stability of a release film comprises the steps of: preparing an adhesive layer and a laminate in which a light-peel release film and a medium-peel release film are attached to both sides of the adhesive layer; deriving light-peel, low-speed release strength by measuring release strength of the light-peel release film and the adhesive layer at peeling speed of 0.3-3.0 m/min; deriving medium-peel, low-speed release strength by measuring release strength of the medium-peel release film and the adhesive layer at peeling speed of 0.3-3.0 m/min; deriving light-peel, high-speed release strength by measuring release strength of the light-peel release film and the adhesive layer at peeling speed of 10-30 m/min; deriving medium-peel, high-speed release strength by measuring release strength of the medium-peel release film and the adhesive layer at peeling speed of 10-30 m/min; and measuring high-speed release strength balance and low-speed release strength balance on the basis of general formulas 1 and 2.SELECTED DRAWING: Figure 1 【課題】信頼度及び正確性の高い離型フィルムの剥離安定性の測定方法を提供すること。【解決手段】粘着層及び前記粘着層の両面に軽剥離離型フィルム及び中剥離離型フィルムが貼り付けられた積層体を用意するステップ、０．３〜３．０ｍ／ｍｉｎの剥離速度で前記軽剥離離型フィルムと前記粘着層の離型力を測定して軽剥離低速離型力を導き出すステップ、０．３〜３．０ｍ／ｍｉｎの剥離速度で前記中剥離離型フィルムと前記粘着層の離型力を測定して中剥離低速離型力を導き出すステップ、１０〜３０ｍ／ｍｉｎの剥離速度で前記軽剥離離型フィルムと前記粘着層の離型力を測定して軽剥離高速離型力を導き出すステップ、１０〜３０ｍ／ｍｉｎの剥離速度で前記中剥離離型フィルムと前記粘着層の離型力を測定して中剥離高速離型力を導き出すステップ、及び一般式１及び２により高速離型力バランス及び低速離型力バランスを測定するステップを含む離型フィルムの剥離安定性の測定方法により、上記課題を解決する。【選択図】図１