GB/T 26752-2020 English PDF

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GB/T 26752-2020: PAN-based carbon fiber
Status: Valid

GB/T 26752: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26752-2020	339	Add to Cart	4 days	PAN-based carbon fiber	Valid
GB/T 26752-2011	719	Add to Cart	3 days	PAN-based carbon fibre	Obsolete

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Basic data

Standard ID: GB/T 26752-2020 (GB/T26752-2020)
Description (Translated English): PAN-based carbon fiber
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q23
Classification of International Standard: 83.120
Word Count Estimation: 18,116
Date of Issue: 2020-03-06
Date of Implementation: 2021-02-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 26752-2020: PAN-based carbon fiber

---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.
PAN-based carbon fiber ICS 83.120 Q23 National Standards of People's Republic of China Replaces GB/T 26752-2011 Polyacrylonitrile-based carbon fiber 2020-03-06 release 2021-02-01 implementation State Administration of Market Supervision Published by the National Standardization Administration

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 26752-2011 "polyacrylonitrile-based carbon fiber". Compared with GB/T 26752-2011, the main technical changes of this standard are as follows. --- Add 2 reference standards (see Chapter 2); --- Add terms and definitions (see 3.1, 3.2 and 3.3); --- Increased solvent classification, process classification and its representation (see 4.1.2 and 4.1.3); --- Sizing agent delete "generic type", add "for thermosetting polyimide resin" "for thermoplastic polyimide resin" And "other" (see 4.1.6, 4.1.4 of the.2011 version); --- Modified the sizing agent content classification and its expression (see 4.1.7, 4.1.5 of the.2011 edition); --- Some varieties have been added to the classification of mechanical properties (see Table 1); --- Modified the carbon fiber product mark (see 4.2, 4.2 of the.2011 edition); --- Revised appearance requirements (see 5.1, 5.1 of the.2011 version); --- Increased length deviation and test method (see 5.2 and 6.2); --- Increased the performance index requirements for tow specifications (see Table 2); --- Removed the upper limit of carbon content (see 5.2 of the.2011 edition); --- Change the density test method to GB/T 30019 (see 6.3.2, 6.2.2 of the.2011 edition); --- Change the test method for sizing agent content to GB/T 29761 (see 6.3.3, Appendix B of the.2011 edition); --- Modify the shelf life (see 8.4.2, 8.4.2 of the.2011 version). This standard is proposed by China Building Materials Industry Federation. This standard is under the jurisdiction of the National Fiber Reinforced Plastics Standardization Technical Committee (SAC/TC39). This standard was drafted. Weihai Development Fiber Co., Ltd., Beijing University of Chemical Technology, China Aviation Industry Corporation Shenyang Aircraft Design and Research Institute Institute, Zhongfu Shenying Carbon Fiber Co., Ltd., China Chemical Fiber Industry Association, Jilin Carbon Valley Carbon Fiber Co., Ltd., Jiangsu Hengshen Limited company. The main drafters of this standard. Cong Zongjie, Chen Dong, Zhang Hongchi, Zou Xiujuan, Gao Aijun, Sui Xiaodong, Lian Feng, Li Deli, Wang Jijun, Qian Hongchuan. The previous versions of the standards replaced by this standard are. --- GB/T 26752-2011. Polyacrylonitrile-based carbon fiber

1 Scope

This standard specifies the terms and definitions, classification and marking of polyacrylonitrile-based carbon fibers, requirements, test methods, inspection rules, packaging, and labeling. Storage, transportation and storage. This standard applies to polyacrylonitrile-based carbon fiber filaments, and is not applicable to non-polyacrylonitrile-based carbon fibers such as pitch-based and viscose-based.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 191 Packaging, storage and transportation icon GB/T 3362 Test method for tensile properties of carbon fiber multifilament GB/T 18374 terms and definitions of reinforced materials GB/T 29761 Determination of carbon fiber sizing content GB/T 30019 carbon fiber density determination

3 terms and definitions

The terms and definitions defined in GB/T 18374 and the following terms apply to this document. 3.1 Twisting fiber Twisted fibers are twisted along the fiber bundle axis. 3.2 Twistless fiber The twisted fiber is not twisted in the fiber bundle axial direction. 3.3 Untwisting fiber Remove twisted fibers.

4 Classification and marking

4.1 Classification 4.1.1 Classification of mechanical properties According to the mechanical properties, it is divided into four categories. high-strength type, high-strength medium model, high-strength model and high-strength high-level model.The classification consists of two Chinese Pinyin letters and four Digit composition. Two letters indicate the classification of mechanical properties, four digits indicate the corresponding mechanical performance parameters, and the first two digits indicate the tensile strength Degrees, the last two digits indicate the tensile modulus of elasticity, as shown in Table 1. For example, high-strength carbon fibers with a tensile strength of 4500MPa ~ < 5500MPa and a tensile elastic modulus of 220GPa ~ < 260GPa, ......

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