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Characteristics and identification method of low smoke halogen free flame retardant belt
Release time:
12 Jan,2024
The identification method of low-smoke halogen-free flame-retardant wire is the product name identification method. Wire-low smoke halogen-free flame retardant polyethylene insulated wire and cable; Cable-low smoke halogen-free flame retardant polyethylene insulated low smoke halogen-free flame retardant polyethylene sheathed power cable. Imitation under normal circumstances the name will be a little different, such as polyethylene insulation low smoke halogen-free sheath flame retardant power cable and so on;
The skin burning method of the identification method of low smoke halogen-free flame retardant wire. There should be no obvious depression when ironing the insulating layer with an electric soldering iron. If there is a large depression, it indicates that the material or process used for the insulating layer is defective. Or barbecue with a lighter, under normal circumstances should be difficult to ignite, after a long period of burning cable insulation is still relatively complete, no smoke and pungent smell, while the diameter has increased. If it is easy to ignite, it can be determined that the insulation of the cable does not use low-smoke and halogen-free materials (probably polyethylene or cross-linked polyethylene materials). If there is a large smoke, it means that the insulation layer is made of halogen-containing material. If the insulation surface falls off seriously and the diameter does not increase significantly after long-term combustion, it means that there is no suitable irradiation cross-linking process.
Hot water immersion method for identification of low smoke halogen-free flame retardant wires. Immerse the core or cable in hot water at 90 ℃. Under normal circumstances, the insulation resistance will not drop rapidly and remain above 0.1 MΩ/Km. If the insulation resistance drops rapidly or even less than 0.009 MΩ/Km, it means that it has not been treated by a suitable irradiation crosslinking process. (Polyethylene or cross-linked polyethylene insulation materials are not suitable for identification by this method, and can be identified by the method in Article 2 above).
Density comparison method for identification methods of low-smoke halogen-free flame-retardant wires. The density of low smoke halogen-free material is larger than that of water, and a little insulating layer can be peeled off and put into water. If it floats above the water surface, it is definitely not a low smoke halogen-free material.
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How much do you know about wire and cable wrapping?
1. protect the insulation or inner sheath layer from damage to the armor when the cable is armored, and play the role of buffer and liner. 2. in the process of cable use, due to different materials on the cable insulation or inner sheath layer from heat insulation, or anti-corrosion, anti-aging and other different effects.
Flame retardant cable is characterized by delaying the spread of flame along the cable so that the fire does not expand. Whether it is a single cable or a bundle of laying conditions, the cable is known to burn when the spread of the flame can be controlled within a certain range, so you can avoid the fire caused by the major disasters, thereby improving the fire level of the cable line.
What is halogen-free flame retardant belt?
Halogen-free flame retardant products with flame retardant level up to UL94-V0 standards, does not contain fluorine, chlorine, bromine, iodine halogen. Low smoke when burning, more environmentally friendly. The product has good self-adhesion, completely self-melting in a short time, no layering, and good sealing. The self-adhesive tape has good ductility, insulation and excellent physical properties.