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Low smoke halogen-free flame retardant wire characteristics and identification methods
Published:2016-09-01     readings:     glyph:【big middle small

What are the characteristics and identification of low smoke halogen-free flame retardant wire? 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 to understand or very little, so we want to recognize the low-smoke halogen-free flame retardant wire should first go to understand the characteristics of the low-smoke halogen-free flame retardant wire and identify what is the method? Specific knowledge of the answer is as follows:


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


  The use of each kind of wire is different, that is because it has other wires do not have the characteristics of the wire, so we are shopping for low-smoke halogen-free flame retardant wire before or first to understand what the characteristics of low-smoke halogen-free flame retardant wire it.


  1. low smoke halogen-free flame retardant wire features - tensile strength than the general PVC wire: general PVC wire tensile strength greater than 1.05Kgf/mm2, and low smoke halogen-free wire tensile strength greater than 1.2Kgf/mm2;.

  2. Low-smoke halogen-free flame-retardant wire features - good weather resistance (-30 ℃ ~ 105 ℃); with a good degree of softness (hardness of 80-90).

  3. Low-smoke halogen-free flame retardant wire features - with non-migration (because the product formula does not need to add plasticizer, so there will be no deformation); combustion will not produce toxic black smoke (will produce a small amount of white smoke); with a high volume resistivity: PVC wire is generally 1012 ~ 1015Ω/cm3, low-smoke halogen-free wire is greater than 1016Ω/cm3; (7) good resistance to high voltage characteristics: PVC wire is generally 1012 ~ 1015Ω/cm3, low-smoke halogen-free wire greater than 1016Ω/cm3; (7) has good resistance to High voltage characteristics: PVC wire is generally resistant to more than 10KV, and low smoke halogen-free wire up to 15KV or more; (8) has good elasticity and adhesion.


  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; cable - low-smoke halogen-free flame-retardant polyethylene insulated low-smoke halogen-free flame-retardant polyethylene sheathed power cables. Imitation products in general, the name will have a little different, such as polyethylene insulated low-smoke halogen-free sheathed flame retardant power cables and so on.


  2, low-smoke halogen-free flame-retardant wire identification method of the skin burning method. With a soldering iron hot insulation should not be obvious depression, if there is a large depression is that the insulation layer of the material used or defective process. Or barbecue with a lighter, under normal circumstances should not be easy to ignite, after a long time to burn the cable insulation layer is still relatively intact, no smoke and irritating odor, while the diameter increased. If it is easy to ignite, it can be determined that the cable insulation layer does not use low-smoke halogen-free materials (most likely polyethylene or cross-linked polyethylene materials). If there is a large amount of smoke, the insulation is made of a halogenated material. If a long time after combustion, the insulation surface shedding is serious, the diameter does not increase significantly, it shows that there is no suitable irradiation crosslinking process.


  3, low smoke halogen-free flame retardant wire identification method of hot water immersion method. The core or cable in 90 ℃ hot water immersion, under normal circumstances, the insulation resistance will not drop rapidly and remain above 0.1MΩ/Km. If the insulation resistance drops rapidly even below 0.009MΩ/Km, it means that there is no suitable irradiation crosslinking process. (Polyethylene or cross-linked polyethylene insulation materials are not applicable to this method of identification, you can use the method of identification of the second article above).


  4, low-smoke halogen-free flame retardant wire identification method of density comparison method. Low-smoke halogen-free material density than water, you can peel off a little insulation into the water, if floating above the surface of the water, it is certainly not low-smoke halogen-free materials.


  The above is a small on the characteristics of low-smoke halogen-free flame retardant wire and identification method is what the introduction, we understand the characteristics of low-smoke halogen-free flame retardant wire, for this kind of wire even if you know, I hope that the above small introduction can help you.


 
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