Safety shoes are shoes that protect the safety of the foot. The focus of protection in the production process is to prevent puncture, electrical insulation, anti-static and toe safety. Let's talk about these four items in detail.
The first is anti-piercing: anti-piercing is a protection against the sole of the foot, in order to protect the bottom of the foot from being punctured and pierced, and a steel plate or steel plate is added to the bottom of the safety shoe. The difference between the steel plate and the steel plate is that the steel plate can not prevent electricity, and the steel plate can prevent electricity, but the resistance of the two bottom plates is the same, and the force required for the puncture of the sole can be ≥ 1100N.
The second is electrical insulation: electrical insulation refers to the use of insulating materials to close the electrical body to isolate the charged body or conductors of different potentials, so that the current can flow in a certain path. To meet the electrical performance requirements of the shoes: the environment is in the temperature of 15 ° C ~ 35 ° C relative humidity 45% ~ 75%, 6KV shoes / boots test voltage (power frequency) is 6KV, test time of one minute, leakage current ≤ 1.8mA is the standard ,
The third is anti-static: anti-static shoes are shoes that can suppress the dust generated by people walking, and reduce or eliminate the danger of static electricity. The anti-static safety shoes can introduce the static electricity of the human body into the earth when worn, thereby eliminating the harm caused by the static electricity of the human body. Anti-static shoes are mainly anti-static in two areas, one is the electrical performance of anti-static shoes, and the other is the energy absorption of the shoe area. The energy absorption standard for the sole area is ≥20J and our safety shoe test result is 29J. The electrical performance of the anti-static shoes is 23 °C ± 2 °C, the relative humidity is 85% ± 5%. After adjusting in a dry environment, 100KΩ ≤ resistance value ≤ 1000MΩ, our safety shoes are 179MΩ ~ 207MΩ. After adjusting in a humid environment, it should be between 100KΩ≤resistance value≤1000MΩ
The fourth is toe safety, toe safety shoes are to have both static pressure and impact resistance, so that the toes protect the toes from damage during the squatting and pressing process. In the safety shoes, our toes are generally protected by the front end of the safety shoes. In the safety shoes, there are steel toe caps, plastic toe caps and composite steel heads. The length of the inside of the toe caps, the impact resistance of the shoes, and the pressure resistance of the shoes are similar, and the difference is that the insulation is not conductive with the steel head, the plastic toe cap and the composite steel head. In the standard, the general requirements for the protection of the toe of the shoe and the internal length of the toe cap should not be moved when the shoe is protected from damage. In addition to the all-rubber sole and all-polymeric footwear, the shoe with the inner protective toe cap has a layer of front lining or a portion of the upper that serves as a lining. Anti-pressure detection of protective toe safety shoes
In addition, the protective toe cap should have a layer of edge covering that extends at least 5 mm below it from the rear edge of the protective toe and extends at least 10 mm in the opposite direction. Baiyatai's shoes meet the standard in the test, with a layer of front lining, the edge covering extends 9mm below the protective baotou back edge and extends 15mm in the opposite direction. Safety shoes with a shoe size of 225 to 265 protect the toe cap from a minimum internal length of ≥ 39 mm. Our protective toe caps are all 41mm. The impact resistance of the shoes, safety shoes at least after (200 ± 4) J impact energy impact, the minimum spacing in the protective toe cap should be ≥ 14mm, in addition, there should be no cracks in the protective material of the protective toe cap axis, that is, light Can pass through cracks. Our safety shoes do not produce any cracks through the material from 17.0mm to 17.5mm. The compressive pressure should be at a pressure of (15 ± 0.1) kN and the minimum spacing within the protective toe cap should be ≥ 14 mm.