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See Chinese contents: QB/T 5137-2017 QB/T 5137-2017: Polyurethane resin for garment synthetic leather
This Standard specifies the classification, requirements, test methods, inspection rules, mark, package, transportation and storage of polyurethane resin for garment synthetic leather. This Standard is applicable to polyurethane resin for garment synthetic leather with certain solid content formed through the chemical reaction and physical mixing of the raw and auxiliary materials, such as isocyanate, polyols, solvents, additives and the like.
