官方通报内蒙古一小学校服有薄膜：网传“薄膜状物质”为TPU，可用于制衣

Group 1 - The incident involves a video posted by a netizen on January 9, 2026, showing a "film-like substance" found in the winter school uniform of Jinshan Third Primary School, which raised public concern [1][2] - The school uniforms were procured in May 2025, delivered in July, and began use in September 2025 [2] - A joint investigation team was formed by local authorities, including education, market regulation, and public security departments, to thoroughly verify the situation [1][3] Group 2 - The procurement process involved a parent committee and representatives from parents, students, and teachers, with 98% of 2,467 surveyed parents agreeing to the purchase [4] - The school conducted quality checks upon delivery, with reports indicating that the uniforms met safety standards, including no formaldehyde and carcinogenic dye presence [4] - The production company was verified to have all necessary licenses, and the materials used in the uniforms were compliant with relevant standards [5] Group 3 - The "film-like substance" identified was determined to be small pieces of thermoplastic polyurethane (TPU) film that had flaked off due to damage, part of the composite fabric used in the uniforms [6] - Testing confirmed that the composite fabric had waterproof and moisture-permeable properties, suitable for various applications including clothing [6]