GB/T 36976-2018 in English
VALIDTextiles—Quantitative chemical analysis—Mixtures of polyimide with certain other fibres
- Issued on:2018-12-28
- Implemented on:2019-07-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 36976-2018纺织品 定量化学分析 聚酰亚胺纤维与某些其他纤维的混合物》由TC209（全国纺织品标准化技术委员会）归口，TC209SC1（全国纺织品标准化技术委员会基础标准分会）执行，主管部门为中国纺织工业联合会。
Introduction
GB/T 36976—2018 Standard Overview
GB/T 36976—2018 "Quantitative Chemical Analysis of Textiles - Mixtures of Polyimide Fibers and Certain Other Fibers" specifies the method of using chemical methods to determine the mixing ratio of polyimide fibers and other fibers in textiles. This standard is applicable to mixtures containing polyimide fibers, including protein fibers, cellulose fibers, polyamide fibers, etc.
Main analysis methods
| Fiber type | Reagents and equipment | Test steps | Scope of application |
|---|---|---|---|
| Polyimide fiber and protein fiber | Hypochlorite solution, stoppered conical flask, water bath oscillator | Dissolve protein fiber, weigh the residue to calculate the polyimide fiber content | Wool, special animal hair fiber, etc. |
| Polyimide fiber and cellulose fiber | Dimethylformamide or 75% sulfuric acid, glass sand core crucible | Dissolve polyimide fiber, weigh the residue to calculate the cellulose content | Cotton, flax, viscose, etc. |
| Polyimide fiber and other synthetic fibers | Formic acid, potassium thiocyanate or 98% sulfuric acid, vacuum filtration device | Dissolve specific fiber components, weigh the residue to calculate the proportion of polyimide fiber | Polyacrylonitrile fiber, polyester fiber, etc. |
Standard formulation background and technology evolution analysis
With the development of the textile industry, new high-performance fibers such as polyimide fibers are increasingly widely used. In order to accurately determine their proportion in the mixture, relevant international and domestic standards have been gradually improved. GB/T 36976-2018 integrates multiple reagent systems and optimizes test steps to ensure the accuracy and repeatability of results.
Implementation recommendations
- Laboratories should be equipped with advanced analytical equipment and reagent storage facilities
- Operators should undergo professional training and be familiar with the use of various reagents
- It is recommended to calibrate instruments regularly to ensure measurement accuracy
- Pay attention to safety protection during the test, especially the use of toxic reagents
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