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A Simple Method Of Four Identification Of Irradiated Cross-linked Low-smoke Halogen-free Wire And Cable
- May 18, 2017 -

Four kinds of simple methods to identify irradiation-crosslinking low-smoke halogen-free flame retardant wires and cables:
1. Product Name recognition method
Wires-irradiation cross-linked low smoke non-halogen flame-retardant polyethylene insulated wire and cable; cable-irradiation cross-linked low smoke halogen-free flame-retardant polyethylene insulated low-smoke halogen-free flame-retardant polyethylene sheathed power cables. Imitation in general, the name will be one points different, such as irradiation cross-linked polyethylene insulated low-smoke halogen-free sheathed flame-retardant power cables and so on.
2, the epidermis Burn the method
Ironing the insulating layer with an electric iron should not have a noticeable sag, if there is a larger depression, the insulating layer of materials or processes used in defects. Or with a lighter barbecue, under normal circumstances should be easy to ignite, long after burning the insulation of the cable is still relatively complete, there is no smoke and pungent smell, while the diameter has increased. If it is easy to ignite, you can determine that the insulation of the cable does not use low smoke and halogen-free materials (probably polyethylene or cross-linked polyethylene materials). If there is greater smog, the insulating layer is used for halogen-containing materials. If the insulation surface falls off seriously after a long period of combustion, the diameter does not increase obviously, then the suitable irradiation crosslinking process is not processed.
3, hot water immersion method
The wire core or cable is soaked in hot water at 90 ℃, and the insulation resistance will not decrease rapidly and remain above the 0.1M Ω/Km in normal condition. If the insulation resistance is rapidly declining or even below 0.009M ω/Km, it is not appropriate to dispose of irradiated crosslinking processes. (Polyethylene or cross-linked polyethylene insulation materials are not recognized by this method and can be identified by the method of the second article above).
4, density contrast method
Low smoke non-halogen material density than water, can peel a little insulating layer into the water, if floating above the water, it is definitely not low smoke and halogen-free materials.
Irradiation cross-linked low-smoke halogen-free flame retardant wire and cable with its excellent comprehensive electrical and physical properties of the broad masses of electrical and electrical workers to obtain the wide recognition, and in Beijing Olympic main project, the Great Hall of the Beijing, such as a series of large-scale landmark buildings in the application of a good market prospects. But worrying is the recent discovery of some imitation and even fake the product, seriously threaten the project quality and engineering image of the key construction projects.