It's easy to confuse flame-retardant cables with fire-retardant cables. The main differences are:
1. Differences in principles
The principle of fireproof cable is different from that of fireproof cable.Halogen cable flame retardant principle is the halogen flame retardant effect, halogen cable flame retardant principle is the precipitation of water to reduce the temperature to extinguish the flame.Fireproof cable is based on the fireproof and heat-resistant properties of mica material in the fireproof layer to ensure that the cable will work normally in case of fire.
2. Differences in structure and materials
The structure and material of fire-resistant cable are also different from that of fire-retardant cable. The basic knot tree of fire-retardant cable is:
(1) the insulation layer adopts flame retardant material
(2) flame retardant materials are used for jacket and outer sheath;
(3) flame-retardant materials are used for wrapping and filling.
And fire-resistant cable is usually in the conductor and insulation layer plus a layer of fire resistance, so in theory can be in the structure of the fire-resistant cable plus layer of fire resistance, the formation of both fire retardant fork fire-resistance cable, but in practice is not necessary.This is because the fireproof layer of the fireproof cable is usually made of multilayer mica tape wrapped directly on the wire.It can be burned for a long time, even if the high polymer applied to the flame is burned, it can ensure the normal operation of the line.
Although flame retardant cables have many advantages that are suitable for chemical enterprises, such as low halogen, low smoke, flame retardant, etc., in general, flame retardant cables can replace flame retardant cables, and flame retardant cables can not replace flame retardant cables.Fire-resistant cables are widely used in high-rise buildings, underground railways, underground streets, large power stations and important industrial and mining enterprises and other places related to fire safety and fire rescue, such as power supply lines and control lines of fire fighting equipment and emergency guide lights and other emergency facilities.