GB/T 41934-2022 in English
VALIDPlastics—Vertical flame spread determination for film and sheet
- Issued on:2022-12-30
- Implemented on:2023-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 41934-2022塑料 薄膜和薄片垂直火焰蔓延的测定》由TC15（全国塑料标准化技术委员会）归口，TC15SC4（全国塑料标准化技术委员会通用方法和产品分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
1. Background and purpose of the standard
With the wide application of flexible plastic materials in packaging, construction and industry, their fire safety issues have attracted much attention. The GB/T41934-2022/ISO12992:2017 standard aims to determine the vertical flame spread performance of plastic films and sheets through a small flame source, providing a reference for the selection of materials for equipment and electrical components.
2. Comparative analysis of standard frameworks
| Standard dimensions | ISO12992:2017 | GB/T41934-2022 |
|---|---|---|
| Scope of application | Plastic film and sheet with a thickness not exceeding 3mm | Equivalent use, consistent scope of application |
| Test equipment | ISO11925-2 gas burner is specified | Gas source requirements and test environment conditions are clarified |
| Result calculation | Flame spread rate (FSR) calculation | Add repeatability and reproducibility analysis requirements |
3. Technical implementation and application cases
A company used this standard to test polyethylene film. The results showed that at a flame height of 40 mm, the flame spread rate of the film was 12.5 mm/s. No burning droplets appeared during the test, and the afterglow lasted for 8 seconds. This case demonstrates the effectiveness and operability of the standard.
4. Implementation suggestions
- Equipment calibration: Ensure that the flame height and gas flow rate of the gas burner meet the standard requirements. Regular calibration is recommended.
- Environmental control: The test should be carried out under constant temperature and humidity conditions to avoid external factors interfering with the test results.
- Data Recording: Record the t1 and t2 values of each test in detail and calculate the average flame spread rate to ensure data reliability.
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