Common faults and causes of flame-retardant cables

Typically, flame-retardant cables are cables that can prevent combustion and automatically extinguish. However, during use, flame-retardant cables often encounter problems. Below, we will introduce common faults and causes of flame-retardant cables.

Common faults of flame-retardant cables

Flame retardant cable refers to a cable in which the sample is burned under specified test conditions, and after removing the test source, the spread of the flame is only within a limited range, and the residual flame or burn can self extinguish within a limited time. The fundamental characteristic is that it may be burned out and unable to operate in the event of a fire, but it can prevent the spread of the fire. Simply put, in the event of a fire in a power line, it can limit the combustion to a local area, prevent spread, protect other equipment, and avoid causing greater losses.

During the manufacturing of flame-retardant power cables, the filling of inorganic flame retardants leads to an increase in the viscosity of the cable's material flow. There are two factors involved in the cable manufacturing process. Firstly, there are quality issues on the surface of extruded cables, with some halogen-free flame-retardant cables on the market having rough surfaces and no glossiness. The reason for this phenomenon is due to the uneven dispersion of halogen-free flame retardants in tree resin, which can cause clumps of objects to appear on the outer surface of the extruded material. This is due to problems that occur during the material composite process of flame-retardant power cables; This phenomenon only occurs when the outer surface of the cable is extruded. There is also a very typical extrusion problem, which can be solved by adjusting the extrusion process parameter settings. Low traction speed combined with high temperature, but such a solution would result in low production efficiency and limited economic practicality.

The second scenario is that there may be mold mouth water material during the processing of halogen-free flame-retardant power cables. The occurrence of such problems may be due to excessive extrusion volume, or it may be due to polarity causing the melt to adhere to the die and itsAl (BH) 4 particle structure, resulting in the material being pushed out of the mold. When a large amount of cable support material accumulates, it will be carried away by the insulated cable, which can lead to quality problems in the use of flame-retardant power cables. So how can we solve these problems? We need to improve the rheological properties of the cable material melt by adding lubricants or surfactants. Low molecular weight polyethylene wax can also be added to the flame retardant masterbatch used in cable production, which is considered an effective lubricant. Surfactants can also be added to increase the fluidity of the composite system of flame retardant power cables.

The above is an introduction to the two common faults and their causes of flame-retardant cables. We hope that after understanding them, everyone can better use flame-retardant cables and apply them well in practice.