GB/T 35268-2017 in English
VALIDTextiles―Quantitative chemical analysis―Mixtures of polytetrafluoroethylene and certain other fibres
- Issued on:-
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 35268-2017纺织品 定量化学分析 聚四氟乙烯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 35268—2017 Standard Overview
GB/T 35268—2017 is a standard developed by China for the quantitative chemical analysis of mixtures of polytetrafluoroethylene fibers and other fibers in textiles. This standard is applicable to a variety of fiber components, including protein fibers, cellulose fibers, acetate fibers, polyacrylonitrile fibers, spandex, polyamide fibers, polyester fibers, polyimide fibers, and polyphenylene sulfide fibers.
Background of Standard Development
With the development of the textile industry, the application of mixed fiber materials is becoming more and more extensive. In order to accurately determine the content of polytetrafluoroethylene fibers and ensure product quality and trade fairness, the National Standards Committee organized relevant institutions and experts to draft this standard. The standard was officially released in 2017 and has become an important reference in the industry.
Technology Evolution Analysis
Polytetrafluoroethylene fibers are widely used in the field of high-performance textiles due to their unique properties (such as high temperature resistance and chemical stability). However, its quantitative analysis method needs to be tailored to the characteristics of different fibers. This standard combines a variety of reagents and experimental conditions to ensure the accurate separation and determination of different fiber components.
Comparison of standard frameworks
| Fiber type | Applicable method | Key reagents | Experimental conditions |
|---|---|---|---|
| Protein fiber | Hypochlorite method | Reagents specified in GB/T 2910.4 | Stand at room temperature |
| Cellulose fiber | 75% sulfuric acid method | Reagents specified in GB/T 2910.11 | Heat to boiling point |
| Polyamide fiber | 80% formic acid method | Reagents specified in GB/T 2910.7 | Room temperature shaking |
| Polyester fiber | 98% sulfuric acid method | Concentrated sulfuric acid and dilute ammonia | High temperature treatment |
Case study: Analysis of a mixture of polytetrafluoroethylene fiber and polyester fiber
Experimental background: A high-performance textile produced by a certain enterprise contains 50% polytetrafluoroethylene fiber and 50% polyester fiber. In order to verify its composition ratio, quantitative analysis was carried out according to GB/T 35268-2017 standard.
Experimental steps: 1. Sample pretreatment: Cut into pieces and mix evenly. 2. Add 98% sulfuric acid solution and heat to boiling point. 3. Filter the residue, wash, dry and weigh. 4. Calculate the mass percentage of polytetrafluoroethylene fiber.
Result analysis:The experimental results show that the content of polytetrafluoroethylene fiber is 52%, which is consistent with the company's statement. The precision of this method does not exceed ±1% at a 95% confidence level, proving its accuracy.
Implementation suggestions
- Staff training:Operators need to receive professional training and be familiar with the standard content and experimental procedures.
- Equipment calibration:Ensure that instruments and equipment (such as balances and oscillators) meet the accuracy requirements.
- Quality control:Perform internal quality control regularly to ensure the stability of experimental results.
- Data Record: Record the analytical data of each batch of samples in detail and create an electronic file.
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