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Commonly used insulation materials for power cords

source:power supply     Popular:adapter     release time:2021-10-27 09:42:05     Article author:sznbone    

  Commonly used insulation materials for power cords

  1. PVC polyethylene

  Commonly used power cords such as UL1007, UL1015, UL1061, UL1430, UL1571, etc., are all selected polyethylene (PVC) plastics. PVC polyethylene is a mixed material of multiple parts based on polyethylene epoxy resin. Regulations for various cables and wires. Plasticizers, stabilizers, fillers, flame retardants, processing aids (lubricants), ultraviolet light adsorbents, additives and unique main purpose preservatives are mixed in the PVC secret recipe. Substance, the key is for insulating layer and sheath (key there are four temperature levels of 70, 80, 90, 105 degrees).

  The basic judgment method of PVC material power cord: when it is ignited, a light yellow flame, black smoke from the exhaust pipe, emerald green at the bottom, and a foul smell.

Commonly used insulation materials for power cords(图1)

  2. PE high pressure polyethylene

  The common 3266, 3385 and other power cords are all selected PE high-voltage polyethylene. High-voltage polyethylene has excellent dielectric strength (relative dielectric constant and dielectric loss tangent are not large), and good organic chemical reliability , Very low air permeability and small water absorption capacity, small ratio, non-toxic, and good plastic deformation, easy to produce and process. The key is for the insulation of communication cables.

  The basic judgment method of the PE material power cord: The surface is relatively smooth, and when it is lit, the flame will be yellow and blue, dripping, with a slight candle smell.

  3. PP polypropylene

  The appearance of polypropylene is milky white crystalline solid, relatively transparent, non-toxic, low water absorption capacity, only 0.03-0.04%, and it is flammable. The ratio is 0.91, which is the least common plastic at this stage. The key is to use the copper core cable insulation layer.


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