Terms and Definitions The following terms and definitions apply to this document. 3.1 Polyurethane coated plastic is a plastic material that combines plastic film and polyurethane plastic through a composite process. 4 Requirements 4.1 Instructions for use Instructions for use shall comply with the provisions of GB/T 5296.4. Children's products shall comply with the provisions of GB/T 5296.4 and GB 31701. The polyurethane material shall be marked with polyurethane or polyurethane (PU). Product maintenance methods should be non-dry cleaning, and for pure polyurethane garments, scrubbing should be used. 4.2 Size specifications, 4.3 Raw materials, 4.4 Appearance quality, 4.5 Physical and chemical properties 5 Inspection methods 5.1 Inspection tools, 5.2 Appearance measurement, 5.3 Physical and chemical property measurement 6 Inspection rules 6 Inspection rules