Foreword
This document is drafted in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules of standardization documents".
Please note that some of the contents of this document may involve patents. The issuer of this document does not assume responsibility for identifying patents. This document is proposed by the China Textile Industry Federation.
This document is attributed to the Sub-Technical Committee on Basic Standards of the National Technical Committee for Textile Standardization (SAC/TC 209/SC 1).
1 Scope
This document specifies the method for determining the fiber content of copper-modified polyacrylonitrile fibers and certain other fiber two-component mixtures after the removal of non-fiber substances using chemical analysis.
This document applies to copper-modified polyacrylonitrile fiber and polyamide fiber, polyacrylonitrile fiber, cellulose fiber (cotton, hemp, viscose fibers, vegetable selvage fiber, modal fiber, copper ammonia fiber) polyester fiber, polyurethane elastic fiber, acrylate fiber, three acrylate fiber two-component mixture.
Note: Copper-modified acrylic fiber qualitative methods see Appendix A, copper-modified acrylic fiber while meeting A.1 ~ A.4.
2 Normative reference documents
The contents of the following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the referenced documents, only the date of the corresponding version applies to this document; do not note the date of the referenced documents, the latest version (including all the change orders) applies to this document.
GB/T 2910.1 Quantitative chemical analysis of textiles Part 1: General rules for testing
GB/T 2910.3 Quantitative chemical analysis of textiles Part 1: Acetate fibers and certain other fiber blends (acetone method)
GB/T 2910.7 quantitative chemical analysis of textiles Part 7: Polyamide fibers and certain other fiber blends (formic acid method)
GB/T 2910.10 Textiles quantitative credits new Part 10: three acetate fibers or polylactic acid fibers and certain other Fiber mixture (dichloromethane method)
GB/T 2910.11 Textiles Quantitative chemical analysis: Part 11: cellulose fibers and polyester fiber mixtures (sulfuric acid method)
GB/T 2910.12 Textiles Quantitative chemical analysis: Part 12: polyacrylonitrile fibers, certain modified polyacrylonitrile fibers, certain chlorinated fibers or certain elastic fibers and certain other fiber blends (dimethylformamide method)
GB/T 2910.25 Textiles Quantitative chemical analysis: Part 25: polyester fibers and certain other fiber blends (trichloroacetic acid/trichloromethane method)
GB/T 38015-2019 Textiles Quantitative chemical analysis of spandex and certain other fiber blends
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Copper modified acrylic fibrecopper modified acrylic fibre
Acrylonitrile monomer through copper ion modification and graft copolymerization to generate polymer, by spinning acrylonitrile modified fiber.
4 Copper modified acrylonitrile fiber and polyamide fiber two-component mixture
5 Copper-modified polyacrylonitrile fiber and polyacrylonitrile fiber two-component mixture (dimethylformamide method)
In accordance with the provisions of GB/T 2910.12.
Copper-modified polyacrylonitrile fiber d value of 1.06.
6 Copper-modified polyacrylonitrile fibers and cellulose fibers (cotton, hemp, viscose fibers, Lyser fibers, modal fibers, copper ammonia fibers) polyamide fibers, polyurethane elastic fibers, acrylate fibers, three-vinyl acetate fiber two-component mixture (75% sulfuric acid method)
In accordance with the provisions of GB/T2910.11.
Copper-modified polyacrylonitrile fiber d value of 1.00.
7 Copper-modified polyacrylonitrile fibers and polyester fiber two-component mixture (trichloroacetic acid / trichloromethane method)
In accordance with the provisions of GB/T2910.25.
Copper-modified polyacrylonitrile fiber d-value of 1.00.
8 copper-modified polyacrylonitrile fiber and polyurethane elastic fiber two-component mixture (dimethylformamide method)
8.1 Principle
Using dimethylformamide to polyurethane elastic fibers from a known dry mass of the sample dissolved and removed, the residue collected, cleaned, dried and weighed; with the amended mass to calculate the percentage of copper-modified polyacrylonitrile fibers in the mixture of dry frying mass. The percentage mass of polyurethane elastomeric fibers was derived from the difference.
8.2 Reagents
Dimethylformamide, analytical purity, boiling point of 152℃~150.
Warning: The reagent can be harmful to human body, the use of suffering should take perfect protection measures.
8.3 Equipment
8.3.1 Use GB/T 2910.1 and the equipment specified in 8.3.1 and 8.3.2 of this document.
8.3.2 Triangular flask with stopper.
8.3.3 Water bath shaker, can be kept boiling.
8.4 test procedures
In accordance with the general procedures specified in GB/T 2910.1, and then operate in accordance with the following steps.
9 copper-modified polyacrylonitrile fiber and acrylate fiber two-component mixture (acetone method)
GB/T 2910.3 in accordance with the provisions of the implementation.
10 copper-modified polyacrylonitrile fiber and three-acrylate fiber two-component mixture (dichloromethane method)
In accordance with the provisions of GB/T 2910.10.
Copper-modified polyacrylonitrile fiber d value of 1.00.
11 standard moisture recovery rate
Copper-modified polyacrylonitrile fiber standard moisture recovery rate of 9.8%.
12 precision
For a homogeneous mixture of textile materials, at a confidence level of 95%, the confidence limit of the test results of the method specified in this document does not exceed 1%.
13 test report
Appendix A (informative) qualitative methods for copper-modified polyacrylonitrile fibers
Bibliography
