At present, the cable industry is accustomed to refer to flame retardant (FireRetardant), halogen-free low-smoke (LowSmokeHalogenFree, LSOH) or low-halogen low-smoke (LowSmokeFume, LSF), fire resistance (FireResistant) and other cables with certain fire resistance properties are collectively referred to as fireproof cables.
Flame Retardant (FlameRetardant)
The characteristic of flame retardant cable is to delay the spread of flame along the cable so that the fire does not expand. Because of its low cost, it is a variety of cables widely used in fireproof cables. Whether it is a single cable or a bundled laying condition, when the cable is burned, the spread of the flame can be controlled within a certain range, so it can avoid major disasters caused by the fire and prolong the burning of the cable, thereby improving the fire protection level of the cable line. .
Halogen Free Low Smoke Flame Retardant Cable (LSOH)
The characteristics of halogen-free low-smoke cables are that they not only have excellent flame retardant properties, but also the materials constituting the low-smoke halogen-free cables do not contain halogens, so the corrosiveness and toxicity during combustion are low, and a very small amount of smoke is generated, thereby reducing the damage to the human body. , damage to instruments and equipment, is conducive to timely rescue in the event of a fire. Although halogen-free low-smoke flame-retardant cables have excellent flame retardancy, corrosion resistance and low smoke concentration, their mechanical and electrical properties are slightly worse than ordinary cables.
Low halogen low smoke flame retardant cable (LSF)
The hydrogen chloride emission and smoke concentration indicators of the low-halogen low-smoke flame-retardant cable are between those of the flame-retardant cable and the halogen-free low-smoke flame-retardant cable. Low halogen (LowHalogen) cable materials will also contain halogen, but the content is lower. The characteristics of this cable are not only flame retardant properties, but also less smoke and hydrogen chloride released during combustion. This low-halogen low-smoke flame-retardant cable is generally made of polyvinyl chloride (PVC) as the base material, and then processed with high-efficiency flame retardant, HCL absorbent and smoke suppressant. Therefore, this flame retardant material significantly improves the combustion performance of common flame retardant polyvinyl chloride materials.
Fire Resistant Cable (FireResistant)
Fire-resistant cables can maintain normal operation for a certain period of time under the condition of flame combustion, and can maintain the integrity of the line (Circuit Intergrity). When the fire-resistant and flame-retardant cable is burned, the amount of acid gas smoke is less, and the fire-resistant and flame-retardant performance is greatly improved, especially when it is burned, accompanied by water spray and mechanical shock and vibration, the cable can still maintain the complete operation of the line.
Edited by: Suzhou Dongtuo Chemical Co., Ltd.
