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See Chinese contents: GB/T 35749-2017 GB/T 35749-2017: Polyamide 66 draw textured yarn
This standard specifies the terms and definitions, classification and identification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage requirements of polyamide 66 draw textured yarn products. This standard applies to elastic yarn made of polyhexamethylene adipamide as raw material, as well as round cross-section glossy, semi-dull and full-dull yarns, which have a nominal linear density range of 7 dtex ~ 150 dtex (plied yarn refers to the nominal linear density before plying) and a single yarn linear density of 0.8 dtex ~ 5.0 dtex.
