GB/T 35443-2024Textiles—Quantitative chemical analysis—Mixtures of alginate fiber with certain other fibers (English PDF)

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 35443-2017 Textiles - Quantitative chemical analysis - Mixtures of alginate fiber and certain other fibers. Compared with GB/T 35443-2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

-- The scope of the standard is changed (see Chapter 1; see Chapter 1 of the 2017 edition);

-- The sodium hypochlorite method is changed to the sodium carbonate method (see Chapter 4; see Chapter 3 of the 2017 edition), and the mulberry silk, sheep wool, cashmere, polylactic acid fiber and their d values are added (see Chapter

4);

-- The content "the d value of alginate fiber is 1.04" is changed to "the d value of alginate fiber is 1.01" (see Chapter 6; see Chapter 5 of the 2017 edition);

-- Cashmere and its d value are added (see Chapter 7);

-- The polylactic acid fiber is added (see Chapter 9).

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the China National Textile and Apparel Council.

This document is under the jurisdiction of the National Technical Committee on Textiles of Standardization Administration of China (SAC/TC209).

Drafting organizations of this document. Qingdao Textile Fiber Inspection Institute, Aimer Co., Ltd., Honny Intelligent Creation (Qingdao) Technology Co., Ltd., Chinatesta Textile Testing & Certification Services, Shandong Kangkang New Materials Technology Co., Ltd., Shaoxing Maibao Technology Co., Ltd., Qingdao University, Fujian Changyuan Textile Co., Ltd., and CTTC (Fujian) Co., Ltd.

Main drafters of this document. Ning Xia, Han Yuru, Xia Yanzhi, Wu Limin, Lü Jing, Li Chengbo, Tian Xing, Zhang Kejia, Che Yunhong, Liu Chunmei, Jiang Huaqiang, Chen Minghong, Li Junjun, Bao Junfang, and Liu Linlin.

The previous versions of this document and the documents it replaces are as follows.

Textiles - Quantitative chemical analysis - Mixtures of alginate fiber with certain other fibers

1 Scope

This document describes a method for the determination of the alginate fiber content in a two-component mixture of alginate fiber and certain other fibers after the removal of non-fibrous matter by chemical analysis.

This document applies to two-component mixtures of alginate fiber and cotton, linen, cuprammonium fiber, viscose fiber, modal fiber, lyocell fiber, polyacrylonitrile fiber, polyester fiber, polyamide fiber, spandex, mulberry silk, sheep wool, cashmere, acetate fiber, triacetate fiber or polylactic acid fiber.

NOTE. For the qualitative identification method of alginate fiber, see Appendix A.

2 Normative references

GB/T 2910.1

GB/T 2910.3

GB/T 2910.10

GB/T 2910.11

GB/T 2910.12

GB/T 2910.18

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Two-component mixture of alginate fiber and cotton, linen,

cuprammonium fiber, viscose fiber, modal fiber, lyocell fiber, mulberry silk, sheep wool, cashmere, polyacrylonitrile fiber, polyester fiber, polyamide fiber, spandex or polylactic acid fiber (sodium carbonate method)

5 Two-component mixture of alginate fiber and polyester fiber

(sulfuric acid method)

6 Two-component mixture of alginate fiber and

polyacrylonitrile fiber or spandex (dimethylformamide method) The principles, reagents, instruments, test procedures, calculation and expression of results involved shall be in accordance with GB/T 2910.12.The d value of alginate fiber is 1.01.

7 Two-component mixture of alginate fiber and sheep wool or

cashmere (sulfate method)

8 Two-component mixture of alginate fiber and acetate fiber

(acetone method) The principles, reagents, instruments, test procedures, calculation and expression of results involved shall be in accordance with GB/T 2910.3.The d value of alginate fiber is 1.00.

9 Two-component mixture of alginate fiber and triacetate fiber

or polylactic acid fiber (dichloromethane method) The principles, reagents, instruments, test procedures, calculation and expression of results involved shall be in accordance with GB/T 2910.10.The d value of alginate fiber is 1.00.

10 Standard moisture regain

The standard moisture regain of alginate fiber is 20.7%.

NOTE. The standard moisture regain of alginate fiber is used here instead of the conventional moisture regain. ......