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Irradiation crosslinking low Smoke halogen-free flame retardant wire and cable has been widely recognized by electrical and electrical Workers for its excellent comprehensive electrical and mechanical properties, and has been applied in a series of national large-scale landmark buildings such as Beijing Olympic Games and the Great Hall of the masses, showing good market prospect. However, it is worrying that in recent years, some imitation and even counterfeit products have been found, which seriously threatens the engineering quality and engineering image of key construction projects.
In view of this situation, the following provide some identification of irradiated crosslinking low smoke halogen-free flame retardant wire and cable, for the industry reference:
1. Product Name Identification method Electric wire--irradiation crosslinking low smoke halogen-free flame retardant polyethylene insulated wire and cable, cable--irradiation crosslinking low smoke halogen-free flame retardant polyethylene insulated low smoke halogen-free flame retardant polyethylene sheathed power cable.
In general, the name will be a little different, such as irradiated xlpe insulated low smoke halogen-free sheathed flame-retardant power cable and so on.
2, the skin burns the method With electric iron hot insulation layer should not be obvious sag, if there is a larger sag, the use of insulating layer of materials or technology defects. Or with a lighter barbecue, under normal circumstances should be not easy to ignite, after a long time after burning the insulation of the cable is still relatively intact, no smoke and pungent odor, while the diameter has increased. If it is easy to ignite, it can be determined that the insulating layer of the cable does not use the low smoke halogen free material china wire and cable networkwww.xianlan315.com (most likely polyethylene or cross-linked polyethylene material). If there is a larger smoke, it means that the insulating layer is the use of halogen-containing materials.
If the insulation surface falls off seriously and the diameter does not increase obviously after a long time burning, the proper irradiation crosslinking process is not carried out.
3, hot water immersion method The wire core or cable is immersed in 90 ℃ hot water, the insulation resistance will not fall rapidly and remain above 0.1mω/km. If the insulation resistance drops rapidly or even below the 0.009mω/km, it is not treated by the appropriate irradiation crosslinking process.
(polyethylene or cross-linked polyethylene insulating material is not suitable for this method identification, can be identified by the method of the second article above).
4. Density comparison method Low smoke halogen-free material density than water, you can peel a little insulating layer into the water, if floating above the water, it is certainly not low smoke halogen-free materials.