aluminum hydroxideFlame retardant is one of the main flame retardant materials in industrial production, and it is the most environmentally friendly and non-toxic flame retardant material. Cable wire is often used as aluminum hydroxide flame retardant to play the role of insulation and flame retardant.

Generally, flame retardant is not less than a certain value. If the flame retardant value is too low, the leakage current along the wire and cable line will inevitably increase, resulting in a waste of electrical energy, while electrical energy becomes heat energy, preparing conditions for thermal breakdown, increasing the possibility of thermal breakdown.

In the DC cable flame retardant, can also use different resistivity of the material composition of the flame retardant, in order to improve the utilization of materials, improve the surface resistivity of the cable flame retardant is also very important, when the surface of dirt and water, due to its uneven distribution, may make part of the surface to withstand higher voltage, resulting in partial discharge or discharge along the surface, causing serious failure.

However, sometimes it is necessary to reduce the surface resistance by artificial methods, such as the conductive core of the cable, because the surface is not completely smooth, the electric field distribution is uneven, and the high electric field strength will cause corona discharge. After the surface of the conductive core is covered with conductive rubber or semi-conductive plastic, the electric field strength on the surface of the core will be reduced to eliminate corona. In addition, the moisture degree of the material can be judged according to the change of the resistance coefficient of flame retardant material.

Because the small conductivity is large, and the size of water molecules is much smaller than that of polymer molecules, the relative movement of polymer macromolecules and chain links under the action of heat, water molecules are easy to penetrate into the polymer, so that the conductive ions in the polymer increase, and the flame retardant decreased.