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See Chinese contents: GB/T 42823-2023 GB/T 42823-2023: Para-aramid filament yarns
This document specifies the technical requirements for para-aramid filament yarns, describes the corresponding test methods, specifies inspection rules, marking, packaging, transportation, storage, etc., and also provides product classification and identification. This document applies to para-aramid filament yarns with nominal linear density of 55 dtex ~ 9990 dtex, monofilament linear density of 0.55 dtex ~ 3.33 dtex, and circular cross-section.
