1. Electrical insulation safety shoes structural requirements
Standard requirements: the sole should have anti-slip function; the sole and heel should not have metal hooks and other parts; the bottom link should not use the upper and lower threaded seams, but can be side seams; and has electrical insulation with impact resistance and pressure resistance. The protective toe cap inside the shoe should be non-metallic.
2. Upper thickness
Standard requirements: leather class ≥ 1.2mm; rubber class ≥ 1.5mm; polymeric material ≥ 1.0mm; fabric ≥ 0.8mm. Test environment temperature: 23 ° C ± 2 ° C; relative humidity: 50% ± 10%
3. Labor insurance shoes, tear resistance (leather, fabric)
Standard requirements: leather class ≥120N; fabric class ≥60N; test ambient temperature: 20°C±2°C; relative humidity: 65%±5%
4. Labor insurance shoes upper tensile performance
Standard requirements: Leather tensile strength ≥ 15N / mm2; test ambient temperature: 20 ° C ± 2 ° C; relative humidity: 65% ± 5% rubber material tear strength ≥ 180N; polymeric material 100% tensile stress 1.3-4.6 N /mm2; tensile elongation of polymeric material ≥250%; test ambient temperature: 23 °C ± 2 °C; relative humidity: 50% ± 10% fabric warp breaking strength ≥ 980N; fabric weft tear strength ≥ 490N; Test environment temperature: 20 ° C ± 2 ° C; relative humidity: 65% ± 5%
5. Safety shoes upper folding resistance (rubber, polymeric materials)
Standard requirements: rubber materials are at least 125,000 times of continuous flexing, no crack on the surface; test ambient temperature: 23 °C ± 2 °C. The polymeric material is at least 150,000 times flexed continuously and has no cracks on the surface. Low temperature inside the box: -5 °C ± 2 °C
6. Safety shoes, cloth, rubber, footwear, uppers, and strips
Standard requirements: strength should be greater than or equal to 2.0 kN / m; test ambient temperature: 23 ° C ± 2 ° C; relative humidity: 50% ± 10%
7. Labor insurance shoes all rubber, polymeric materials upper and fabric adhesion strength
Standard requirements: strength ≥ 0.6 kN / m; test ambient temperature: 23 ° C ± 2 ° C; relative humidity: 50% ± 10%
8. Safety shoes outsole anti-skid pattern and thickness
Standard requirements: The sole and heel portion should have an anti-slip pattern like the side opening. Direct injection, vulcanization or adhesive outsole: thickness d1≥4mm, pattern height d2≥2.5mm Multilayer Outsole: Thickness d1≥4mm, pattern height d2≥2.5mm Full rubber and all-polymer material Outsole: Thickness d1 ≥3mm, pattern height d2≥4mm, thickness d3≥6mm When the height of the anti-skid pattern cannot be measured, the thickness of the outsole at any place except the waist is ≥6mm
9. Labor insurance shoes outsole tear strength (non-leather)
Standard requirements: ≥5kN/m (material with density ≤0.9g/cm3); ≥8kN/m (material with density >0.9g/cm3); test ambient temperature: 23°C±5°C
10. Safety shoes outsole wear resistance
Standard requirements: density ≤ 0.9g / cm3 (6kV non-leather shoes), relative volume wear ≤ 250mm3. Density > 0.9g / cm3 (6kV non-leather shoes), relative volume wear ≤ 150mm3. Relative volume wear ≤ 250mm3 (cloth rubber shoes). Relative volume wear ≤ 250mm3 (15kV and above all rubber / full polymer shoes). Test environment temperature: 23 ° C ± 2 ° C
11. Labor insurance shoes outsole folding resistance (non-leather)
Standard requirements: the outer sole continuously bends 30,000 times, and the incision grows ≤ 4mm.
12. Safety shoe outsole hydrolysis (polyurethane outsole / outer layer)
Standard requirements: the outer sole continuously bends 150,000 times, and the incision grows ≤6mm.
13. Labor insurance shoes outsole intermediate layer bonding strength
Standard requirements: The bond strength between the outer or non-slip layer and the adjacent layer is ≥ 4.0 N/mm. If the sole has tearing during the test, the bonding strength is ≥3.0N/mm.
14. Insulating safety shoes. Appearance quality of finished shoes
Standard requirements: Electrically insulated leather shoes should meet the sensory quality requirements of QB 1002-2005; electrical insulation cloth rubber shoes should meet the appearance quality requirements of HG/T2495-2007; electrical insulation full rubber shoes should meet the appearance quality requirements of HG/T2401-1992 Electrically insulated all-polymeric footwear shall comply with the requirements of 4.2.1 and 4.2.2 of QB 1471-1992.
15. Insulation labor insurance shoes upper / sole bonding strength (except leather shoes, stitched bottom)
Standard requirements: In addition to the suture bottom, the combined strength of the upper and the outsole is ≥4.0N/mm. If the sole has tearing during the test, the bonding strength is ≥3.0N/mm.
16. Insulating safety shoes into shoes leakproof (all rubber, full polymer shoes)
Standard requirements: There should be no air leakage in the shoes (boots). Test environment temperature: 23 ° C ± 2 ° C
17. Insulation labor insurance shoes into shoes electrical performance requirements
Standard requirements: 6kV leather shoes; test voltage (power frequency) is 6kV, test time is 1min, leakage current is ≤1.8mA; test ambient temperature: 15°C-35°C, relative humidity: 45%-75%