This standard specifies the terms and definitions, requirements, test methods, inspection rules and marking, packaging, transportation and storage of thermoplastic polyurethane watch straps (hereinafter referred to as "swatch straps"). This standard applies to watch straps made of thermoplastic polyurethane elastomer (TPU). Watch straps made of other rubber materials can also be used with reference.
QB/T 4887-2015 Referenced Document
GB 6675.4-2014 Safety of toys.Part 4:Migration of certain elements
GB/T 10111 Generation of random numbers and procedures applied to sampling inspection for product quality
GB/T 2828.1 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 2829 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 531.1 Rubber,vulcanized or thermoplastic.Determination of indentation hardness.Part 1:Duromerer method( Shore hardness)
HG/T 3689 Test method of discoloration for footwear
QB/T 1901.2-2006 Watch-cases and accessories good alloy covering Part 2: Determination of fineness, thickness, corrosion resistance and adhension
QB/T 4781 Test conditions for appearance of watch casings