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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 20392-2023: Test method for physical properties of cotton fibers - High volume instruments method Status: Valid GB/T 20392: Historical versions
Basic dataStandard ID: GB/T 20392-2023 (GB/T20392-2023)Description (Translated English): Test method for physical properties of cotton fibers - High volume instruments method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: W04 Classification of International Standard: 59.060.10 Word Count Estimation: 10,166 Date of Issue: 2023-11-27 Date of Implementation: 2024-06-01 Older Standard (superseded by this standard): GB/T 20392-2006 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 20392-2023: Test method for physical properties of cotton fibers - High volume instruments method---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 59:060:10 CCS W04 National Standards of People's Republic of China Replace GB/T 20392-2006 Test methods for physical properties of cotton fibers Large volume fibers tester method Published on 2023-11-27 2024-06-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee ForewordThis document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 20392-2006 "HVI Cotton Fiber Physical Properties Test Method": Compared with GB/T 20392-2006, except In addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Changed the scope of application (see Chapter 1, Chapter 1 of the:2006 edition); b) Added calibration level requirements for color standard cotton and color calibration porcelain plates (see 5:2); c) The requirements for the graduation value of the balance have been changed (see 5:4, 5:4 of the:2006 edition); d) Added calibration level requirements for micronaire calibration cotton (see 5:5); e) Added the requirements for the length/strength calibrated cotton breaking ratio strength test distance level (see 5:6); f) The standard atmosphere for humidity conditioning and testing has been changed (see 6:1, 6:1 of the:2006 edition), and the moisture regain conditions of pre-humidified samples have been changed (see 6:2, 6:2 of the:2006 edition), adds the requirements for sample equilibrium time in the dehumidified state (see 6:3); g) Changed the quality requirements for laboratory samples (see 7:1,:2006 version of 7:1); h) The sampling method has been changed (see 7:2,:2006 version of 7:2); i) The quality requirements for test specimens have been changed (see 7:2, 8:1:2:1, 8:3:2:1, and 8:4:2:1 of the:2006 edition); j) Changed the instrument warm-up time during color calibration (see 8:1:1:1,:2006 version of 8:1:1:1); k) Added processing requirements when impurities, average length of the upper half and length uniformity verification are unacceptable (see 8:2:1:5, 8:4:1:6); l) The requirements for micronaire calibration sample selection have been changed (see 8:3:1:1, 8:3:1:2 of the:2006 version), and the micronaire verification method has been added: method (see 8:3:1:4, 8:3:1:5), and the requirement for the number of micronaire tests (see 8:3:2:5) is added; m) Changed the rules for numerical rounding (see 9:2, 9:1 of the:2006 version); n) Added precision requirements for test methods (see Chapter 10); o) Changed the content of the "Test Report" (see Chapter 11, Chapter 10 of the:2006 edition): Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed and coordinated by the National Fiber Standardization Technical Committee (SAC/TC513): This document was drafted by: China Fiber Quality Monitoring Center, Xuzhou Inspection and Testing Center, Jiangsu Provincial Fiber Inspection Bureau, China Agricultural Sciences Institute of Cotton Research Institute, Bayingolin Mongolian Autonomous Prefecture Inspection and Testing Center, Shihezi Fiber Inspection Institute, Changji Prefecture Fiber Inspection Institute, Borta Mongolia Fiber Inspection Institute of Ancient Autonomous Prefecture: The main drafters of this document: Yu Xiaoxin, Ding Shiyong, Shao Jiarui, Zhang Hexuan, Hou Chuan, Li Wei, Xu Kai, Tang Shurong, Li Shunjie, Wu Jiaojiao, Ren Meng, Ma Li, Feng Yulong, Wang Xingyu, Liu Ziyang, Zheng Yi, Wu Wei, Fan Pengfei, Lu Weidong: The previous versions of this document and the documents it replaces are as follows: ---First published as GB/T 20392-2006 in:2006; ---This is the first revision: Test methods for physical properties of cotton fibers Large volume fibers tester method1 ScopeThis document describes the large-capacity fiber tester that tests cotton fibers for color, impurities, micronaire, length and length uniformity index, and breakage: Specific strength and elongation at break methods: This document is suitable for testing the physical properties of fine-staple cotton and long-staple cotton processed by top rollers or sawtooth:2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: GB/T 6097 Cotton fiber test sampling method GB/T 6529 Standard atmosphere for humidity conditioning and testing of textiles GB/T 8170 Numerical rounding rules and expression and determination of limit values3 Terms and definitionsThe following terms and definitions apply to this document: 3:1 Reflectancereflectancedegree;Rd How light or dark a cotton sample reflects light: 3:2 yellow depthyelowness Yellowness The shades of yellow tint in the cotton sample: 3:3 Trashparticlecount The total number of impurity particles on the surface of the cotton sample within the test area: 3:4 Impurity area percentage trashareapercent The percentage of the coverage area of impurity particles on the surface of the cotton sample within the test area to the test area: 3:5 Micronaire valuemicronairevalue A measure of the breathability of a given amount of cotton fiber under specified conditions: Note 1: The micronaire scale is based on a series of cottons with micronaire values determined by international agreement: Note 2: The micronaire value is expressed using a subjectively determined scale, the micronaire scale: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20392-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 20392-2023_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 20392-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20392-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
