T/CPPIA 37-2024 The polyester-based film used for the release film of the multi-layer ceramic capacitor (MLCC) is referred to as the "release film polyester film" in English

Scope

Scope: This document specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation, and storage for polyester-based films used as release films for chip-type multilayer ceramic capacitors (MLCCs). This document applies to the production, inspection, and sale of polyester-based films used as release films for chip-type multilayer ceramic capacitors, which are made from polyethylene terephthalate (PET) as the main raw material, with added masterbatch chips, and are manufactured through melt extrusion, three-layer co-extrusion, and biaxial stretching. Main technical content: 5. Requirements 5.1 Rolling quality: The film rolls should be neatly rolled, with a smooth appearance, consistent tension, no obvious vertical stripes, no obvious star-shaped folds at the ends, and uneven ends ≤ 5mm. 5.2.4 Appearance quality: The film rolls should not have defects such as dead folds, bulging ribs, mechanical damage, or oil stains. Foreign objects and scratches on the film surface should comply with the requirements specified in Table 1. 5.3 Specifications and tolerances 5.3.1 Specifications: The nominal thickness of the polyester-based film is 15-40 μm, and the length and width are determined by mutual agreement between the supplier and the buyer. 5.3.2 Tolerances: The specifications of the polyester-based film used as a release film for chip-type multilayer ceramic capacitors comply with Table 2, which is determined by mutual agreement between the supplier and the buyer. 5.4 Optical and physical properties: The optical and physical properties should comply with the requirements specified in Table 3.

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