GB/T 35443-2024 PDF English
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| GB/T 35443-2024 | English | 185 |
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Textiles - Quantitative chemical analysis - Mixtures of alginate fiber with certain other fibers
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| GB/T 35443-2017 | English | 170 |
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GB/T 35443-2024: Textiles - Quantitative chemical analysis - Mixtures of alginate fiber with certain other fibers
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GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 59.080.01
CCS W 04
Replacing GB/T 35443-2017
Textiles - Quantitative chemical analysis - Mixtures of
alginate fiber with certain other fibers
Issued on: MARCH 15, 2024
Implemented on: APRIL 1, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
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)... 6
5 Two-component mixture of alginate fiber and polyester fiber (sulfuric acid method)
... 7
6 Two-component mixture of alginate fiber and polyacrylonitrile fiber or spandex
(dimethylformamide method)... 7
7 Two-component mixture of alginate fiber and sheep wool or cashmere (sulfate
method)... 8
8 Two-component mixture of alginate fiber and acetate fiber (acetone method)... 8
9 Two-component mixture of alginate fiber and triacetate fiber or polylactic acid fiber
(dichloromethane method)... 8
10 Standard moisture regain... 8
11 Precision... 9
12 Test report... 9
Appendix A (Informative) Qualitative identification method of alginate fiber... 10
References... 13
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
The provisions of the following documents constitute the essential clauses of this
document through normative references in this text. Among them, for referenced
documents with dates, only the versions corresponding to the dates are applicable to
this document; for referenced documents without dates, the latest versions (including
all amendments) are applicable to this document.
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 fibres (method using acetone)
GB/T 2910.10 Textiles - Quantitative chemical analysis - Part 10.Mixtures of
triacetate or polylactide and certain other fibres (method using dichloromethane)
GB/T 2910.11 Textiles - Quantitative chemical analysis - Part 11.Mixtures of
certain cellulose fibres with certain other fibres (method using sulfuric acid)
GB/T 2910.12 Textiles - Quantitative chemical analysis - Part 12.Mixtures of
acrylic, certain modacrylics, certain chlorofibres, certain elastane fibres with
certain other fibres (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
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)
4.1 Principle
The sodium carbonate solution is used to dissolve and remove alginate fiber from a
mixture of known dry mass, the residue is collected, washed, dried and weighed, and
then the corrected mass is used to calculate its percentage to the dry mass of the mixture.
The mass fraction of alginate fiber is obtained from the difference.
4.2 Reagents
The reagents specified in GB/T 2910.1 and the following are used.
4.2.1 Sodium carbonate solution. Sodium carbonate solution with a mass fraction of 5%
(dissolve 5 g of sodium carbonate powder in 95 mL of distilled water).
4.2.2 Dilute acetic acid solution. Take 5 mL of glacial acetic acid and dilute it to 1000
mL with distilled water.
4.3 Equipment
Equipment specified in GB/T 2910.1 and the following are used.
4.3.1 Conical flask with a stopper. with a capacity of not less than 200 mL.
4.3.2 Constant temperature water bath oscillator. It is capable of reciprocating or
circular oscillation at a frequency of (150±10) times/min and maintaining the
temperature at (50±2) ℃.
4.4 Test steps
Follow the general procedures specified in GB/T 2910.1, and then proceed as follows.
Place the prepared specimen in a stoppered conical flask (4.3.1) and add 100 mL of
sodium carbonate solution (4.2.1) per gram of specimen to dissolve. After being fully
moistened, place it in a constant temperature water bath oscillator (4.3.2) at a
temperature of (50±2) ℃ and oscillate at a frequency of (150±10) times/min for 30
minutes. Filter it with a sintered-glass filter crucible with a known dry weight, and wash
the residue into a sintered-glass filter crucible with a small amount of (50±2) ℃ sodium
carbonate solution (4.2.1). Drain the liquid by vacuum suction, then wash it with water,
neutralize it with dilute acetic acid solution (4.2.2), and finally wash the residue with
water continuously. After each wash, drain the liquid by gravity first, and then drain it
by vacuum suction.
Finally, the crucible and the residue are dried, cooled and weighed.
4.5 Calculation and presentation of results
The calculation and presentation of the results are in accordance with GB/T 2910.1.The
d value (correction coefficient for mass change) of spandex is 1.01, the d value of
mulberry silk is 1.03, and the others are 1.00.
5 Two-component mixture of alginate fiber and polyester fiber
(sulfuric acid method)
5.1 Principle
75% (mass fraction) sulfuric acid reagent is used to dissolve and remove alginate fiber
from a mixture of known dry mass, the residue is collected, washed, dried and weighed,
and the corrected mass is used to calculate its percentage to the dry mass of the mixture.
The mass fraction of alginate fiber is obtained from the difference.
5.2 Reagents, instruments, test procedures, calculation and expression of results
The reagents, instruments, test procedures, calculation and expression of results
involved shall be in accordance with GB/T 2910.11.The d value of polyester fiber is
1.00.
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)
7.1 Principle
75% (mass fraction) sulfuric acid reagent is used to dissolve and remove alginate fiber
from a mixture of known dry mass, the residue is collected, washed, dried and weighed,
and the corrected mass is used to calculate its percentage to the dry mass of the mixture.
The mass fraction of alginate fiber is obtained from the difference.
7.2 Reagents, instruments, test procedures, calculation and expression of results
The reagents, instruments, test procedures, calculation and expression of results
involved shall be in accordance with GB/T 2910.18.The d value for sheep wool and
cashmere is 0.985.
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.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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