GB/T 14344-2022 English PDF (GBT14344-2022)

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GB/T 14344-2022: Man-made fibre - Test method for tensile properties of filament yarns
GB/T 14344-2022
Man-made fibre -- Test method for tensile properties of filament yarns
ICS 59.060.20
CCS W50
National Standards of People's Republic of China
Replacing GB/T 14344-2008
Test method for tensile properties of chemical fiber filaments
Published on 2022-04-15
2022-11-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
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 of Standardization Documents"
drafted.
This document replaces GB/T 14344-2008 "Test Method for Tensile Properties of Chemical Fiber Filament Filaments", and is in conformity with GB/T 14344-2008
In addition to structural adjustment and editorial changes, the main technical content changes are as follows.
a) Changed the scope of application (see Chapter 1, Chapter 1 of the.2008 edition);
b) Added terms and definitions such as "gauge length", "stress", "strain", "modulus", "initial modulus", "work at break" and "fracture toughness" (see Section
Chapter 3, Chapter 3 of the.2008 edition);
c) Added the recommended type of gripper (see 5.1.3);
d) the yarn frame or similar device is deleted [see 5.2b) of the.2008 edition];
e) changed the requirements for laboratory water [see 5.2.5, 5.2f) of the.2008 edition];
f) The requirement for sample preparation "remove at least 100m of surface silk per package" has been added (see 6.1.2.1);
g) MODIFY the preparation of specimens for unsupported packages [see 6.1.2.2, 6.1.2a) of the.2008 edition];
h) The preparation of specimens for untwisted, unreticulated filaments and wet state tests has been added (see 6.1.2.3 and 6.1.2.4);
i) Added humidity conditioning and preconditioning -- requirements for dry state testing (see 6.2);
j) Modified the standard atmosphere and time for humidity control and test (see 6.2.1 and 6.2.2, see 6.2 of the.2008 edition);
k) The requirements for pre-conditioning and humidity-conditioning of silk strands, retractable cylinders and twisted samples are added (see 6.2.2.1);
l) The strength range and elongation range are deleted (see 6.3.4 and 6.3.5 of the.2008 edition);
m) Changed the requirements for loading samples (see 7.2, 7.1.2 of the.2008 edition);
n) The hooking strength and knotting strength are deleted (see 7.2 and 7.3 of the.2008 edition);
o) The calculation formulas of breaking strength, elongation at fixed strength and initial modulus have been added (see 8.2, 8.3 and 8.5);
p) Modified the calculation formulas of modulus, work at break and fracture toughness (see 8.4, 8.6 and 8.7, 8.3, 8.4 and 8.5 of the.2008 edition);
q) Tolerances (Chapter 9 of the.2008 edition) were deleted;
r) Added "Recommended value of twist applied to filament" (see Appendix A);
s) Added "Calculation method for increasing the number of tests" (see Appendix D);
t) Changed "Calculation of Statistical Values" (see Appendix E, Appendix C of the.2008 edition).
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China National Textile and Apparel Council.
This document is under the jurisdiction of the National Chemical Fiber Standardization Technical Committee (SAC/TC586).
This document is drafted by. Shanghai Textile Industry Technical Supervision Institute, Jiangsu Hengli Chemical Fiber Co., Ltd., Suzhou Shenghong Fiber Co., Ltd.
Company, Shanghai Textile Group Testing Standards Co., Ltd., Xinxiang Chemical Fiber Co., Ltd., Sinopec Yizheng Chemical Fiber Co., Ltd., Guangzhou Inspection and Quarantine Co., Ltd.
Testing and Certification Group Co., Ltd., Guangdong Xinhui Meida Nylon Co., Ltd., Yantai Taihe New Materials Co., Ltd., Jiangsu Xiannuo
New Material Technology Co., Ltd., Yiwu Huading Nylon Co., Ltd., Shenma Industrial Co., Ltd., Fujian Yongrong Jinjiang Co., Ltd.
Company, Xinfengming Group Co., Ltd., Shaoxing Fangyuan Testing Technology Co., Ltd., Wuxi Jintong High Fiber Co., Ltd., Zhejiang Haili Environmental Protection
Technology Co., Ltd., Xiamen Xianglu Chemical Fiber Co., Ltd., Suzhou Longjie Special Fiber Co., Ltd., Anhui Wanwei High-tech Materials
Co., Ltd., Tongkun Group Co., Ltd., Zhejiang Shengyuan Chemical Fiber Co., Ltd., Fujian Baichuan Resource Regeneration Technology Co., Ltd.
Company, Weihai Haima Kechuang Fiber Co., Ltd., Zhangjiagang Xinxin High Fiber Co., Ltd., Zhejiang Youfu High-tech Fiber Co., Ltd., Jiangsu
Solide New Materials Group Co., Ltd., Zhejiang Guxiandao Green Fiber Co., Ltd., Minjiang University, Shandong Hualun New Materials Co., Ltd., China
Manmade Fibers Industry Association.
The main drafters of this document. Wang Lili, Li Hongjie, Chen Rui, Wu Juan, Wu Kaiqi, Yang Yonghong, Ji Xuan, Luo Wubo, Li Rongjiang, Sun Yu, Wu Dezhen,
Zhang Xuehua, Duan Wenliang, Xiao Xiao, Fu Zhongxian, Cui Li, Zeng Shuangsui, Qian Qiyuan, Wang Yajuan, Zhang Donggui, He Xiaolin, Sun Xianwu, Sun Yanlin, Wu Weiguang,
Li Xiaohui, Lu Wenjuan, Xie Lifeng, Jiang Wei, Zhao Haiyan, Hu Yunli, Jin Liang, He Zehan, Wang Fengran, Yang Zhichao, Liu Bingling, Sun Qinchao, Li Deli,
Zhang Zixin.
The previous versions of this document and its superseded documents are as follows.
---First published in.1993, first revised in.2003, second revised in.2008;
---This is the third revision.
Test method for tensile properties of chemical fiber filaments
1 Scope
This document describes test methods for tensile properties of manmade fiber filaments.
This document applies to chemical fiber filaments, excluding spandex and carbon fibers.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 4146 (all parts) Textile chemical fibers
GB/T 6502 Chemical Fiber Filament Sampling Method
GB/T 6503 Test method for moisture regain of chemical fibers
GB/T 6682 Analysis Laboratory Water Specifications and Test Methods
GB/T 9994 Conventional moisture regain of textile materials
GB/T 14343 Test method for linear density of chemical fiber filaments
3 Terms and Definitions
The terms and definitions defined in GB/T 4146 (all parts) and the following terms and definitions apply to this document.
3.1
Gauge length gaugelength
The total fiber length measured when the gripping point of the first gripper and the second gripper is at the starting position.
[Source. GB/T 4146.3-2011, 2.1.6, with modifications]
Example. Schematic diagram of the gripping point for a cable-type gripper, see Figure 1.
Index number description.
A --- Grip point.
Note. The gripping points of the two grippers are at the starting position, and the total fiber length between the gripping points at this time is the gauge length.
Figure 1 Schematic diagram of the gripping point of the cable column gripper