T/CPPIA 30-2024 Polarizing film protective film optical polyester base film

Scope

Scope: This document specifies the terms and definitions, product structure, requirements, test methods, inspection rules, marking, packaging, transportation, and storage for optical polyester base films used in polarizer protective films. Applicable to the production, inspection, and sales of optical polyester base films for polarizer protective films made from polyethylene terephthalate (PET) as the (main) raw material, through melt extrusion, biaxial stretching, and inline coating. Main technical contents: 5. Requirements 5.1 Appearance quality 5.1.1 Rolling quality The film rolls should be neatly rolled, with a smooth appearance and consistent tension, without obvious longitudinal stripes. The end faces should not have obvious star-shaped wrinkles, and the unevenness of the end faces should be ≤3 mm. 5.1.2 Visual quality The film rolls should not have defects such as dead folds, bulging, mechanical damage, or oil stains. Foreign objects and scratches on the film surface should comply with the requirements specified in Table 1. 5.2 Dimensions and tolerances 5.2.1 Length and width tolerances The length tolerance is 1%, and the width tolerance is ±1 mm. 5.2.2 Thickness, average thickness tolerances, and extreme deviations The thickness and average thickness tolerances, as well as the extreme deviations, should comply with the requirements specified in Table 2. 5.3 Physical properties The physical properties of the product should meet the requirements specified in Table 3. If the user has other requirements, they should be determined through consultation between the supplier and the buyer. 5.4 Surface resistance The surface resistance of the product should meet the requirements specified in Table 4. If the user has other requirements, they should be determined through consultation between the supplier and the buyer.

Development Information

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