Flame retardant wire and cable has special flame retardant, low smoke, smoke suppression performance. What flame retardant properties should cable material have? The following Tianxing cable Xiaobian to give you a detailed description of the types and performance of flame retardant wire and cable, I hope to help you!

Type and performance of flame retardant wire and cable

1, ordinary flame retardant wire and cable

Halogenated polymer materials (or modified by adding halogenated flame retardants) are generally used as insulation and sheathing materials for ordinary flame retardant wires and cables, and polyvinyl chloride (PVC) is a commonly used material. Common PVC resin has the characteristics of high electrical insulation, excellent chemical resistance, wear resistance and aging resistance, and low price, and has become a relatively more used cable material in China. However, PVC will release carbon dioxide, various aromatics, chlorine-containing compounds and other toxic and harmful gases when burned.

2, low smoke flame retardant wire and cable

Low smoke flame retardant wire and cable can be added to the insulation and sheath materials of aluminum hydroxide, magnesium hydroxide and other inorganic hydroxide flame retardants. Its flame retardant principle is the coacervated phase flame retardant principle: aluminum hydroxide and magnesium hydroxide are thermatively decomposed to release water, heat absorption reduces the actual temperature of insulation and sheathing materials, and hinders the material decomposition to release combustible gases. The metal oxide produced is also a refractory material, which covers the surface of the material and improves the flame retardant ability of the insulation and sheath, so as to achieve the purpose of isolating air and preventing combustion. The advantages of aluminum hydroxide and magnesium hydroxide as flame retardants are: non-volatile, low cost, flame retardant, smokeless. However, the compatibility with the matrix resin is poor, and a large number of additives must be added to reach a certain level of flame retardant, and the molding processability and mechanical properties of the material will be easy to reduce.

Antimony compounds can also be added to the material of low-smoke flame-retardant cables. Antimony compounds themselves are not flame retardants, but flame retardants, often used in combination with halides. Antimony trioxide reacts with halides at high temperatures to produce antimony trihalide or antimony halide oxide. The flame retardant principle is the vapor phase flame retardant principle: antimony trihalide vapor can stay in the combustion zone for a long time and dilute the combustible gas. The high density of antimony trihalide vapor covers the polymer surface, which can play the role of heat insulation and oxygen insulation, and is very good for preventing the combustion of materials. The decomposition of halogenated antimony oxide is an endothermic reaction, which can reduce the temperature and decomposition rate of flame retardant materials. The surface effect of liquid and solid antimony trihalide particles can reduce the flame energy. Antimony trihalide can promote the coking reaction of condensed phase, relatively delay the thermal decomposition and oxidative decomposition of substances that produce flammable gas, and the generated carbon layer can prevent the flammable gas from escaping to the flame zone, protecting the underlying substance from destruction.

3, low smoke halogen-free flame retardant wire and cable

The insulation and sheath materials of low-smoke halogen-free flame retardant wire and cable are mostly thermoplastic elastomer materials, which do not contain halogen elements such as Fuwan iodine. In the manufacturing process, mercury, chromium, cadmium, lead and other heavy metal elements that pollute the environment are eliminated, and polyamide is often used as the material. The flame retardant mechanism of the cable is interrupt exchange flame retardant mechanism. Intermittent exchange flame retardant refers to taking away part of the heat generated in the combustion process of flame retardant materials, so that the material can not maintain the thermal decomposition temperature, so that it can not continue to produce combustible gas, so that the combustion self-extinguishing. For example, when the flame retardant material is subjected to high heat or combustion, it will melt, and when the molten material falls, it will take away most of the heat, thereby delaying the combustion and achieving the purpose of stopping the combustion.

Fluorine plastic flame retardant wire and cable

Fluorine plastic flame retardant wire and cable has flame retardant because of the special chemical structure of its material. The material does not need modification or flame retardant treatment, and has the characteristics of high temperature resistance, non-combustion, high oxygen index and self-extinguishing. It is an ideal conductor for optical fiber communication cables.

What is the difference between ordinary insulated wire and flame retardant wire?

The difference between ordinary insulated wire and flame retardant wire is that flame retardant wire has passed flame retardant test or certification, while ordinary cable has not. Most common insulated wire and flame retardant wire have no obvious difference in appearance, but domestic flame retardant wire will be printed with the word ZR. Foreign standards such as UL are printed with words such as Volkswagen-1 or CMP and CMR according to different flame retardant levels. Flame-retardant cable refers to a cable in which the sample is burned under specified test conditions, the flame spreads only within a limited range after the test fire source is removed, and the residual flame or combustion can extinguish itself within a limited time. The fundamental feature is that the fire may burn out and cannot be operated, but it can prevent the spread of the fire. In general, if there is a wire fire, the combustion can be limited to a local scope, does not spread, and can also save other equipment to avoid causing greater losses.

Qingdao Tianxing Cable Co., Ltd. is a technology enterprise specializing in the production of wire and cable in Shandong Province, with more than 150 sets of domestic excellent cable production equipment and testing equipment, excellent production technology, modern testing equipment, to ensure stable product quality and timely supply. The company's main products are power cable, mineral cable, high life wire and cable, radiation crosslinked cable, control cable, computer cable, photovoltaic cable, communication cable, data cable, low smoke halogen free cable, flame retardant series wire and cable.