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GB/T 46185-2025Liquid crystalline polyarylate filament yarns (English PDF)

液晶聚芳酯长丝

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 29, 2025

Implementation date

March 1, 2026

Scope

GB/T 46185-2025 is the English-translated version of 液晶聚芳酯长丝.

GB/T 46185-2025 is the Chinese national standard for liquid crystalline polyarylate filament yarn, melt spun from linear macromolecules whose ester bonds join aromatic rings and which show thermotropic liquid crystal behaviour.

It defines the product and its two forms, the precursor filament wound after spinning and the filament that has then been heat treated, gives the product classification and the technical requirements, and describes the test methods that go with them, which take linear density from GB/T 14343 and tensile properties from GB/T 14344.

It also sets the product identification, the inspection rules, with sampling to GB/T 2828.1-2012, and the marking, packaging and storage. It covers yarns of 10 dtex to 1667 dtex with single filaments of 1.50 dtex to 9.90 dtex and a circular cross-section. It was issued on 29 August 2025 and has applied since 1 March 2026.

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Document preview — GB/T 46185-2025

National Standard of the People's Republic of China

ICS: 59.060.20
Classification: W 52

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and Definitions

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

1 Scope

This document defines the terms and definitions of liquid crystal polyarylate filament products, and specifies the technical requirements, product identification, inspection rules, marking, packaging, It covers aspects such as packaging, transportation, storage, etc., provides product classification, and describes the corresponding test methods.

This document is applicable to liquid crystals with nominal linear density of 10dtex~1667dtex, single yarn linear density of 1.50dtex~9.90dtex, and circular cross-section polyarylate filament. Other specifications and types may be used for reference.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 2828.1-2012 Sampling procedures for inspection by attributes Part 1: Sampling for batch inspection based on acceptance quality limit (AQL) plan

GB/T 4146 (all parts) Textiles - Chemical Fibers

GB/T 6502 Sampling method for chemical fiber filaments

GB/T 6504 Test method for oil content of chemical fibers

GB/T 6505 Test method for thermal shrinkage of chemical fiber filaments (after treatment)

GB/T 6682 Specifications and test methods for water used in analytical laboratories

GB/T 14343 Test method for linear density of man-made filament yarns

GB/T 14344 Test method for tensile properties of chemical fiber filaments

GB/T 43801 Test method for relative dielectric constant and loss tangent of copper-clad laminates in the microwave frequency range - Split dielectric resonator method

3 Terms and Definitions

GB/T 4146 (all parts) and the following terms and definitions apply to this document.

3.1 Liquid crystal polyarylate filament

Fiber filaments made by melt spinning linear macromolecules composed of aromatic groups connected by ester bonds. At least 85% of the ester bonds It is directly connected to two aromatic rings and has thermotropic liquid crystal properties.

3.2 Liquid crystal polyarylate precursor filament

Liquid crystal polyarylate filaments are obtained by melt spinning and then winding liquid crystal polyarylate.

3.3 Heat-treated liquid crystal polyarylate filament

Liquid crystal polyarylate filaments are obtained by subjecting liquid crystal polyarylate precursors to a heat treatment at elevated temperatures for a certain period of time.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 4146

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