Essential protective properties of thermal protective clothing
Tag:
Thermal protective clothing, protective clothing, protective workwear, flame retardant clothing
In addition to the wearing performance of ordinary protective clothing, thermal protective clothing must also have the function of safely protecting the human body under high temperature conditions , that is, it has special thermal protection properties. In different use occasions and different use environments, the nature of the heat source that causes harm to the human body is different, the heat transfer methods of the heat source are different, and the thermal protection performance requirements for thermal protective clothing are also different. But in general, thermal protective clothing must have the following protective properties:
1. Thermal insulation
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Thermal insulation means that thermal protective clothing must have good performance in slowing down and preventing heat transfer, avoiding heat sources from causing harm to the human body, and providing good safety protection for users of thermal protective clothing working in high temperature environments.
2. Liquid permeability
Thermal protective clothing is anti-liquid permeable Performance, it can prevent high-temperature water, oil, solvents or other liquids from reaching human skin through clothing fiber materials, pores in fabrics, clothing seams, pinholes, etc., thereby causing damage.
3. Integrity
Integrity refers to the performance of thermal protective clothing under high temperature conditions It can maintain the original appearance of the fabric without reducing the intrinsic quality, and does not cause shrinkage, melting and brittle carbonization. Thermal protective clothing fabrics that lack integrity can tear and expose the body directly to the heat source. The droplets produced by melting can also directly damage the skin and cause human harm. Therefore, integrity is also an important performance to ensure that thermal protective clothing has good thermal protection performance and usability.
4. Flame retardancy
Flame retardancy means that the fabric encounters special It is refractory or non-combustible when exposed to high temperatures or flames; when the fabric catches fire, it can contain the spread of combustion, and it can extinguish itself immediately once the fire source is removed. Therefore, flame retardancy is one of the more important thermal protection properties of thermal protective clothing. At the same time, more serious burns mainly occur in parts where people’s clothing catches fire. The ratio of second- and third-degree burns caused by this is the main factor that determines whether people can be effectively rescued and recovered when they are exposed to a flash fire. Therefore, in most thermal protective clothing performance requirements, flame retardancy is regarded as a main assessment item.
In the actual application of thermal protective clothing, the requirements for thermal protection performance and other properties are also different for different purposes and environments. For example, fire-fighting clothing should not only have good flame retardancy, but also have good thermal radiation protection, thermal convection protection, and certain waterproof properties; welding clothing should have excellent resistance to the impact of molten metal droplets; petrochemical and coal mines The use of protective clothing also requires additional antistatic properties.
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