for export supply construction site safety helmet air hole fiberglass material 专供出口 供应施工工地 安全帽透气孔 玻璃钢材质

【Product Performance】：

1. Impact absorption performance: After pre-treatment with low and high temperature water immersion, when a 5 Kg steel ball is dropped freely from a height of 1 meter, the force transmitted to the head crossbar does not exceed 4900 N.

2. Puncture resistance: Can withstand a 1-meter drop test with a 3 Kg steel cone (with a 60° tip) without contact with the head cross-section.

3. Flame retardant properties: According to the national GB821-89 standards, the flame burning cap shall be achieved within 1 second; after removing the flame, the combustion time shall not exceed 5 seconds.

4. Electrical insulation performance: AC 1200V high-voltage withstand test, leakage current within 1 minute does not exceed 1.2mA.

5. Lateral rigidity: Tests shall be conducted in accordance with national standard GB821-89. The maximum deformation of the cap shell shall not exceed 40 mm, and the residual deformation shall not exceed 15 mm.

6. Anti-static properties: Tested in accordance with national GB821-89 standards; the actual measured surface resistance is no more than 1×10⁹ Ω.

7. Temperature resistance: No deformation between -5°C and +100°C.

8. Resistant to water, acid, alkali, oil, and chemical corrosion