GB/T 26752-2020PAN-based carbon fibre (English PDF)

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).

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 document. 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.

4 Classification and marking