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See Chinese contents: FZ/T 54025-2009 FZ/T 54025-2009: Polyamide 66 pre-oriented yarn
This standard specifies the product classification and identification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage requirements of polyamide 66 pre-oriented yarn. This standard is applicable to the quality identification, acceptance, arbitration of pre-oriented yarns (mainly used for processing elastic yarns) made of polyhexamethylene adipamide as raw materials, as well as glossy, semi-matte and full-matte yarns which have a nominal linear density range of 8 dtex ~ 167 dtex, a single yarn linear density of 1.0 dtex ~ 5.5 dtex, a circular cross-sectional shape.
