This standard specifies the terms and definitions, classification and identification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of polyester filament for industry.
This standard is applicable to the polyester filament for industry with a linear density of 140~9 000dtex and serves as a reference for other polyester filament for industry.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2828.1-2012 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 3291.1 Textiles - Terms of textile material properties and test - Part 1: Fibre and yarn
GB/T 3291.3 Textiles - Terms of textile material properties and test - Part 3: General
GB/T 4146 (all parts) Textiles - Chemical fibers
GB/T 6502 Sampling method of man-made filament yarns
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 14343 Testing method for linear density of man-made filament yarns
GB/T 14344 Testing method for tensile of man-made filament yarns
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 3291.1, GB/T 3291.3 and GB/T 4146 (all parts) and the following apply.
3.1
index of dimensional stability
sum of the elongation and dry heat shrinkage of fiber at a load of 4.0cN/dtex
3.2
high-tenacity (HT) polyester filament for industry
polyester filament for industry with breaking tenacity not less than 7.40cN/dtex
3.3
ultra-high-tenacity (UHT) polyester filament for industry
polyester filament for industry with breaking tenacity not less than 8.20cN/dtex
3.4
high-tenacity medium-shrinkage (HTMS) polyester filament for industry
polyester filament for industry with dry heat shrinkage (test conditions: 177℃, 10mim; pretension: 0.05cN/dtex) above 4.0% but not exceeding 6.0% and breaking tenacity not less than 7.40cN/dtex
3.5
high-tenacity low-shrinkage polyester (HTLS) filament for industry
polyester filament for industry with dry heat shrinkage (test conditions: 177℃, 10mim; pretension: 0.05cN/dtex) not exceeding 2.5% and breaking tenacity not less than 6.60cN/dtex
GB/T 16604-2017 The following standards are cited：
