Characteristics Of Low Smoke Halogen-free Flame Retardant Wire

What are the characteristics and identification methods of low smoke halogen-free flame retardant wires? We don't know anything about low smoke halogen-free flame retardant wires. Many people only know about wires, but we know very little about wires for different purposes. Therefore, if we want to know about low smoke halogen-free flame retardant wires, we must first understand the characteristics and identification methods of low smoke halogen-free flame retardant wires? The specific answers are as follows:

What are the characteristics of low smoke halogen-free flame retardant wires?

The purpose of each wire is different because it has the characteristics that other wires do not have. Therefore, before purchasing low smoke halogen-free flame retardant wires, let's first understand the characteristics of low smoke halogen-free flame retardant wires.

1. Characteristics of low smoke halogen-free flame retardant wire - the tensile strength is greater than that of ordinary PVC wire: the tensile strength of ordinary PVC wire is greater than 1.05kgf/mm2, while the tensile strength of low smoke halogen-free wire is greater than 1.2kgf/mm2;

2. Characteristics of low smoke halogen-free flame retardant wire - good weather resistance (- 30 ℃ ~ 105 ℃); Good softness (hardness 80-90);

3. Characteristics of low smoke halogen-free flame retardant wire - non mobility (because no plasticizer is added to the product formula, it will not have mobility); No toxic black smoke will be generated during combustion (a small amount of white smoke will be generated); It has high volume resistivity: PVC wire is generally 1012 ~ 1015 Ω / cm3, and low smoke halogen-free wire is greater than 1016 Ω / cm3; (7) It has good high voltage resistance characteristics: PVC wires are generally resistant to more than 10kV, while low smoke halogen-free wires are up to more than 15kV; (8) It has good elasticity and viscosity.

What is the identification method of low smoke halogen-free flame retardant wire?

1. Product name identification method for identification method of low smoke halogen-free flame retardant wire. 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. Generally, the name of the imitation products will be a little different, such as polyethylene insulated low smoke halogen-free sheathed flame-retardant power cable and so on.

2. Skin burning method for identifying low smoke halogen-free flame retardant wire. Scald the insulating layer with an electric soldering iron. There should be no obvious depression. If there is a large depression, it indicates that the material or process used in the insulating layer is defective. Or barbecue with a lighter. Under normal circumstances, it should not be easy to ignite. After burning for a long time, the insulation layer of the cable is still relatively complete, there is no thick smoke and pungent smell, and the diameter is 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 material (probably polyethylene or cross-linked polyethylene). If there is large smoke, it indicates that the insulating layer is made of halogen containing material. If the insulation surface falls off seriously and the diameter does not increase significantly after long-time combustion, it indicates that appropriate irradiation crosslinking process treatment has not been carried out.

3. Hot water immersion method for identification of low smoke halogen-free flame retardant wires. Soak the wire core or cable in hot water at 90 ℃. Under normal circumstances, the insulation resistance will not drop rapidly and remain above 0.1M Ω / km. If the insulation resistance drops rapidly or even lower than 0.009m Ω / km, it indicates that it has not been treated by appropriate irradiation crosslinking process. (polyethylene or cross-linked polyethylene insulating materials are not applicable to this method, but can be identified by the method in Article 2 above).

4. Density comparison method for identification of low smoke halogen-free flame retardant wires. The density of low smoke halogen-free material is higher than that of water. You can peel off a little insulating layer and put it into water. If it floats above the water surface, it must not be low smoke halogen-free material.

The above is the Xiaobian's introduction to the characteristics and identification methods of low smoke halogen-free flame retardant wires. After we understand the characteristics of low smoke halogen-free flame retardant wires, we even know this kind of wires. I hope the above Xiaobian's introduction can help you.