T/BYXT 017-2023 Active

Scope: This document specifies the terms and definitions, classification, general principles, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of rare earth antibacterial protective films. This document is applicable to the preparation and processing of rare earth antibacterial protective films. Other polymer materials and fiber materials for hygiene protective films may refer to this document for implementation. Main technical content: Product performance requirements shall comply with the requirements in Table 1. Table 1 Performance Requirements Requirements for Soft Film Hardened Glass Film Hardness: No scratches shall be observed when a 2H hard pencil is drawn across the surface. Resistance to hardness: The product shall withstand a 9H-level pencil being pressed and pushed at a 45° angle under a 500g load without scratches or marks. Resistance to friction: After 500 abrasion tests, the product shall not exhibit penetration. After 3,000 abrasion tests, the product shall not exhibit penetration. Impact resistance: After the impact test, the product shall not be damaged and can still be used normally. Blue light emission performance: When the product explicitly has blue light protection function, its blue light transmission ratio π sb shall not exceed (86+0.5)%. Table 1 (continued) Visible light transmission ratio: The transmittance of transparent films shall not be less than 90%, and that of semi-transparent films shall not be less than 35%. Yellowing resistance: After continuous testing for 8 hours at a temperature of 40°C ± 3°C using a UV-A340 lamp with a voltage of 0.65 mV, the product shall not exhibit significant yellowing or discoloration. Temperature requirements: High temperature 40°C ± 3°C, low temperature -20°C ± 2°C, each lasting 24 hours. After each test, the product shall be restored to normal temperature for testing. Under both high and low temperature conditions, the prod