T/CPPIA 38-2024 Flexible printed circuit board with matte polyester film

Scope

Scope: This document specifies the requirements, test methods, inspection rules, marking, packaging, transportation, and storage for matte polyester films (referred to as films) used in flexible printed circuit boards. Applicable to the production, inspection, and sales of matte polyester films for flexible printed circuit boards, which are made from polyethylene terephthalate (PET) as the main raw material and are extruded and biaxially stretched by melting; Main technical contents: 4. Requirements 4.1 Appearance quality 4.1.1 Coiling quality: The film rolls should be coiled neatly, with a smooth appearance, consistent tension, no obvious longitudinal stripes, no obvious star-shaped folds at the ends, and uneven ends of no more than 2mm. The joints of the film rolls should be clearly marked, with no more than one joint in the same roll, and the joint length should be no less than 500 meters. 4.1.2 Visual quality: The film should not have wrinkles, looseness, scratches, crystal points, mold lip lines, impurities, or any defects that affect its applicability, and there should be no obvious color differences. 4. Dimensions and deviations 4.2.1 Length and width deviations: The length deviation is a positive deviation of 0-50 meters, and the width deviation is ±2mm. 4.2.2 Thickness and thickness deviations: The thickness and deviations should comply with the provisions of Table 1. 4.3 Physical properties: The physical properties should comply with the provisions of Table 2.

Development Information

Related Standards