Flame retardant performance of protective heat insulation clothing
Flame retardancy refers to the fact that the fabric is non-combustible or non-combustible when exposed to particularly high temperatures or flames; When the fabric catches fire, it can contain the spread of combustion and extinguish itself immediately after the ignition is evacuated. In fires, severe burns often occur in the parts of people's clothes that catch fire, so the flame retardant performance of thermal protective clothing is very important. In the process of using thermal protective clothing, it is generally a certain side of the fabric to meet the flame, such as firefighting clothing, in the operation process of firefighters entering and exiting the fire scene, to a large extent, the outer side of the firefighting clothing is in direct contact with the flame, and the inner side is rarely in contact with the flame, which requires the thermal protective fabric to have the performance of being able to resist the flame from burning through from one side to the other, so it is also necessary to consider the burning performance of the fabric to the flame.
Thermal resistance of protective insulating clothing
A fire can be a temperature that rises to 600 degrees in a few minutes. Even in a room where there is a direct fire, the temperature is about 300 degrees Celsius, and the heat that can melt plastic is enough to kill people. Thermal protective clothing is mainly used for high-temperature work, and must maintain its own physical properties at high temperatures, without shrinkage, melting and brittle carbonization.
Wearing performance and wearing comfort
In addition to thermal protection performance, thermal protective clothing must also have good wearing performance and wearing comfort, such as certain tensile strength, tear strength, and wear resistance. Dyeing firmness and washability, but also should have a certain ability to transfer heat and moisture, in order to facilitate the loss of human heat and sweat evaporation, with a low physiological load In addition, the protective clothing also requires light weight, easy to wear, loose structure, no restrictions on running, climbing, jumping and other actions, not easy to cause hooking, in the easily injured parts to take strengthening measures, to meet the requirements of coordination and comfort, to increase work efficiency.
Thermal insulation of protective clothing
In the actual use of thermal protective clothing, most users do not directly contact the flame, but the external heat is transferred to the human body in the form of thermal convection, thermal radiation, and heat conduction, causing harm to the human body. Thermal protective clothing must have good performance in slowing down and preventing heat transfer, avoid harm to the human body caused by heat sources, and provide good safety protection for users of thermal protective clothing working in high temperature environments. The thermal insulation of thermal protective clothing is not only related to the thermal conductivity of the fiber raw materials of thermal protective clothing, but also related to the design and fabric of clothing. The structure of the material and lining has a great relationship.
