1. The product name identification method for the identification method of low-smoke halogen-free fire-retardant wires. Wire-low-smoke halogen-free flame-retardant polyethylene insulated wire and cable; cable-low-smoke halogen-free fire-retardant polyethylene insulated low-smoke halogen-free fire-retardant polyethylene sheathed power cable. Imitation products generally have a slightly different name, such as polyethylene insulated low-smoke halogen-free sheathed flame-retardant power cable and so on.
2. The skin burn method is the identification method of low-smoke halogen-free fire-retardant wires. Iron the insulating layer with an electric soldering iron and there should be no obvious depressions. If there is a large depression, it means that the material or process of the insulating layer is defective. Or use a lighter for barbecue. Normally, it should not be easy to ignite. After a long period of burning, the insulation layer of the cable is still relatively complete, without heavy smoke and pungent smell, and the diameter has increased. If it is easy to ignite, it can be determined that the insulation layer of the cable does not use low-smoke halogen-free materials (probably polyethylene or cross-linked polyethylene materials). If there is a lot of smoke, it means that the insulating layer uses halogen-containing materials. If the insulation surface falls off severely after burning for a long time, and the diameter does not increase significantly, it means that the appropriate irradiation cross-linking process has not been carried out.
3. The hot water immersion method is the identification method of low-smoke halogen-free fire-retardant wires. Soak the core or cable in hot water at 90℃, under normal circumstances, the insulation resistance will not drop rapidly and stay above 0.1MΩ/Km. If the insulation resistance drops rapidly or even lower than 0.009MΩ/Km, it means that it has not been treated by a suitable radiation cross-linking process. (Polyethylene or cross-linked polyethylene insulation material is not suitable for this method to identify, you can use the second method above to identify).
4. Density comparison method for identification method of low-smoke halogen-free fire-retardant wires. Low-smoke halogen-free materials have a higher density than water, so you can peel off a little insulation layer and put them in water. If they float above the water, they are definitely not low-smoke halogen-free materials.