This standard specifies the classification, requirements, test methods, inspection rules, packaging and marking of conical bobbins for cross-wound dyeing. This standard applies to cross-wound conical bobbins for dyeing (hereinafter referred to as "dyed conical tubes") with a half-cone angle of 4°20' and a yarn winding width not exceeding 1-25mm. This standard also applies to dyed tapered tubes with a half-cone angle of 3°30′ and 5°57′ and a yarn winding width not exceeding 1-25mm.
GB/T 191 Packaging.Pictorial marking for handling of goods*, 2008-04-01 Update
GB/T 20035.4-2005 Textile machinery and accessories.Cones for cross winding.Part 4:Dimensions,tolerances and designation of cones with half angle 4°20′for winding for dyeing purposes
GB/T 2828.1 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)*, 2013-02-15 Update
GB/T 2829 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 4892 Dimensions of rigid rectangular transport packages*, 2021-03-09 Update