Scope This standard specifies the terms and definitions, classification, specifications and dimensions, technical requirements, inspection methods, sampling and determination, packaging, labeling, transportation and storage of polyurethane sponge masks. This standard applies to masks produced with polyurethane sponge as the main raw material. Usually used in daily life, it has the functions of beauty, warmth preservation, sun protection, etc., and can filter out catkins, wind and sand, etc. This standard also applies to fabric composite polyurethane sponge masks. 2 Normative reference documents 3 Terms and definitions 4 Classification 5 Specifications and dimensions 6 Technical requirements 6.1 Raw materials 6.2 Appearance requirements 6.3 Performance requirements (formaldehyde content, pH value, decomposable carcinogenic aromatic amine dyes, mask belt strength, tensile elastic recovery performance, bonding Seam fastness, breathing valve modification fastness, color fastness, air permeability, UV protection performance, etc.) 6.4 Hygiene requirements 7 Inspection methods (specification and size inspection, appearance requirements inspection, performance requirements inspection, hygiene requirements inspection) 8 Sampling and judgment 9Packaging, labeling, transportation and storage