Textiles - Quantitative chemical analysis - Mixtures of alginate fiber with certain other fibers
1 Scope
This document specifies the method for determining the content of the alginate fiber in two-component mixtures of alginate fiber with certain other fibers after removing non-fibrous substances using the chemical analysis method.
This document is applicable to two-component mixtures of alginate fiber with cotton, hemp, cupro fiber, viscose fiber, modal fiber, lyocell fiber, acrylic fiber, polyester fiber, polyamide fiber, elastane, mulberry silk, wool, cashmere, acetate fiber, triacetate fiber or polylactide fiber.
Note: See Annex A for the qualitative identification method of alginate fibers.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2910.1 Textiles - Quantitative chemical analysis - Part 1: General principles of testing
GB/T 2910.3 Textiles - Quantitative chemical analysis - Part 3: Mixtures of acetate and certain other fibers (method using acetone)
GB/T 2910.10 Textiles - Quantitative chemical analysis - Part 10: Mixtures of triacetate or polylactide and certain other fibers (method using dichloromethane)
GB/T 2910.11 Textiles - Quantitative chemical analysis - Part 11: Mixtures of cellulose and polyester fibers (method using sulfuric acid)
GB/T 2910.12 Textiles - Quantitative chemical analysis - Part 12: Mixtures of acrylic, certain modacrylics, certain chlorofibres, certain elastane fibers with certain other fibers (method using dimethylformamide)
GB/T 2910.18 Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk and wool or hair (method using sulfuric acid)
3 Terms and definitions
No terms and definitions are listed in this document.
4 Two-component mixtures of alginate fiber with cotton, hemp, cupro fiber, viscose fiber, modal fiber, lyocell fiber, mulberry silk, wool, cashmere, acrylic fiber, polyester fiber, polyamide fiber, elastane or polylactide fiber (method using sodium carbonate)
4.1 Principle
The alginate fiber is dissolved and removed from a known dry mass of the mixture with sodium carbonate solution. The residue is collected, cleaned, dried, and weighed, and its mass, corrected if necessary, is expressed as a percentage of the dry mass of the mixture. The percentage of the alginate fiber is found by difference.
4.2 Reagents
Use reagents specified in GB/T 2910.1 and the following.
4.2.1 Sodium carbonate solution: Sodium carbonate solution with a mass fraction of 5% (dissolve 5g of sodium carbonate powder in 95 mL of distilled water).
4.2.2 Dilute acetic acid solution: Dilute 5 mL of glacial acetic acid with distilled water to 1,000 mL.
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Two-component mixtures of alginate fiber with cotton, hemp, cupro fiber, viscose fiber, modal fiber, lyocell fiber, mulberry silk, wool, cashmere, acrylic fiber, polyester fiber, polyamide fiber, elastane or polylactide fiber (method using sodium carbonate)
5 Two-component mixtures of alginate fiber with polyester fiber (method using sulfuric acid)
6 Two-component mixtures of alginate fiber with acrylic fiber or elastane (method using dimethylformamide)
7 Two-component mixtures of alginate fiber with wool or cashmere (method using sulfuric acid)
8 Two-component mixtures of alginate fiber with acetate fiber (method using acetone)
9 Two-component mixtures of alginate fiber with triacetate fiber or polylactide fiber (method using dichloromethane)
10 Standard regain
11 Precision
12 Test report
Annex A (Informative) Qualitative identification method of alginate fibers
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