What are the characteristics and identification methods of low smoke halogen-free flame retardant wires? For low smoke halogen-free flame retardant wire we do not know, many people only know the wire, but for some different uses of the wire is still very little understanding, so we want to know the low smoke halogen-free flame retardant wire to first to understand the characteristics of low smoke halogen-free flame retardant wire and what is the identification method? Specific knowledge answers are as follows:

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

Each kind of wire is used for different purposes, because it has the characteristics that other wires do not have, so we should first understand the characteristics of low smoke zero-halogen flame retardant wire before we buy it.

Low smoke halogen-free flame retardant wire characteristics - tensile strength than general PVC wire: general PVC wire tensile strength is greater than 1.05Kgf/mm2, and low smoke halogen-free wire tensile strength is greater than 1.2Kgf/mm2;

The characteristics of low smoke halogen-free flame retardant wire -- good weather resistance (-30℃~105℃); Have a good degree of softness (hardness is 80-90); 3.

The characteristics of low smoke halogen-free flame retardant wire - with non-shifting (because this product does not need to add plasticizer in the formula, it will not have the shape shifting); Burning will not produce toxic black smoke (will produce a small amount of white smoke); Have high volume resistivity: PVC wire is commonly 1012 ~ 1015 Ω / cm3, low smoke zero halogen wire is greater than 1016 Ω / cm3; (7) with good high voltage resistance characteristics: PVC wire generally resistant to more than 10KV, and low smoke halogen-free wire 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, low smoke halogen-free flame retardant wire identification method of product name identification method. Wire -- low smoke halogen free flame retardant polyethylene insulated wire and cable; Low smoke Halogen Free flame retardant polyethylene insulated low smoke Halogen Free flame retardant polyethylene sheathed power cable. Imitation products generally have a little different name, such as polyethylene insulation low smoke halogen-free sheathed flame retardant power cable and so on.

2, low smoke halogen-free flame retardant wire identification method of skin burning method. If the insulation layer is ironed with the electric iron, there should be no obvious dent. If there is a large dent, it means that the material or process used for the insulation layer is defective. Or use a lighter to barbecue, under normal circumstances should be not easy to ignite, after a long time of combustion, the insulation layer of the cable is still relatively complete, there is no smoke and pungant smell, and the diameter has increased. If it ignites easily, make sure that the insulation of the cable is not made of a low smoke and halogen-free material (most likely polyethylene or crosslinked polyethylene). If there is a large smoke, it means that the insulation layer is made of halogen material. If after a long time of combustion, the insulation surface falls off seriously and the diameter does not increase significantly, it indicates that the appropriate irradiation cross-linking process has not been carried out.

3, low smoke halogen-free flame retardant wire identification method of hot water immersion method. Put the core wire or cable in 90 ℃ hot water immersion, insulation resistance will not normally fell sharply and keep above 0.1 M Ω / Km. Ω such as insulation resistance fell sharply even less than 0.009 M/Km, then without proper irradiation crosslinking process. (Polyethylene or XLPE insulation materials are not suitable for identification by this method, and can be identified by the method in Article 2 above).

4, low smoke halogen-free flame retardant wire identification method of density comparison method. The density of low-smoke halogen-free material is higher than that of water, so you can strip off a little insulation layer and put it in water. If it floats above the water, it is definitely not low-smoke halogen-free material.

The above is the introduction of the characteristics and identification method of the low smoke halogen-free flame retardant wire. After we understand the characteristics of the low smoke halogen-free flame retardant wire, we also know the wire. I hope the introduction of the small series above can help you.