Introduction to flame-retardant cables

Flame retardant cable refers to a cable that, under specified test conditions, the sample is burned, and after removing the test flame source, the flame spread is only within a limited range, and the residual flame or ignition can extinguish itself within a limited time.

Flame retardant wires refer to wires that can block and delay the spread and extension of flames along the wire in the event of a fire accident, minimizing the extension of the wire's fire range. Moreover, it has the characteristic of self extinguishing after a fire, which can also be understood as that when a wire or wire product catches fire due to its own or external heat source, the fire source subsides, and the wire will not continue to burn or burn briefly.

Flame retardant cables maintain the electrical and physicochemical properties of ordinary cables while also possessing self-extinguishing properties, which means they are not easily combustible. When the cable catches fire due to self ignition or external ignition sources, the cable will no longer continue to burn after the fire is extinguished, or the combustion time is very short (within 60 minutes), or the flame extension length is very short.

meaning

Under specified test conditions, the sample is burned, and after removing the ignition source, the flame spread on the sample is only within a limited range and extinguishes itself, which means it has the ability to prevent or delay the occurrence or spread of the flame. The combustion of wires, cables, and cables is caused by external heating, which generates flammable gases. To achieve flame retardancy, it is necessary to suppress the three factors that cause combustion, namely combustible gases, heat, and oxygen. Therefore, the general method used for flame-retardant wires and cables is to add halides and metal oxides containing halogens to the sheath material. From the perspective of flame retardancy, this is an excellent method. However, due to the presence of halogens in these materials, they release a large amount of smoke and hydrogen halide gas during combustion, resulting in low visibility during fires, which greatly hinders the safe evacuation and firefighting of personnel, And people are more likely to suffocate and die from toxic gases.

In addition, once hydrogen halide gas reacts with water in the air, it generates "hydrogen halide acid", which seriously corrodes instruments, equipment, and buildings, causing "secondary disasters". With the continuous improvement of technology, the issue of flame retardancy has evolved from halogen flame retardancy in the past to low halogen and halogen-free flame retardancy.

Scope of use

The use range of flame-retardant cables is very wide, including fields such as construction, transportation, energy, communication, etc.

In the field of construction, flame-retardant cables are widely used in public places such as high-rise buildings, shopping malls, hospitals, schools, etc. In the field of transportation, flame-retardant cables are widely used in places such as subways, high-speed trains, airports, etc. These places are densely populated, and once a fire occurs, the consequences will be unimaginable. Flame retardant cables can prevent cable burning, reduce the speed of fire spread, and buy valuable time for people's escape in the event of a fire.

In the field of energy, flame-retardant cables are widely used in power plants, substations, and other places where power equipment is dense. Once a fire occurs, the consequences are unimaginable. Flame retardant cables can prevent cable combustion, reduce the speed of fire spread, and protect the safety of electrical equipment in the event of a fire.

In the field of communication, flame-retardant cables are widely used in places such as telecommunications, broadcasting, and television. These places have dense equipment, and once a fire occurs, the consequences are unimaginable. Flame retardant cables can prevent cable burning, reduce the speed of fire spread, and protect the environment during a fire.