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Introduction to basic knowledge of radiation cross-linked wires and cables

Introduction to basic knowledge of radiation cross-linked wires and cables

  • Categories:Cable knowledge
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  • Time of issue:2015-10-26
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(Summary description)In today's industrialized society, energy and information are the two pillars of the society, and the transmission of electric energy and information cannot be separated from wires and cables, especially high-rise commercial buildings, subways, tunnels, and nuclear power plants.

Introduction to basic knowledge of radiation cross-linked wires and cables

(Summary description)In today's industrialized society, energy and information are the two pillars of the society, and the transmission of electric energy and information cannot be separated from wires and cables, especially high-rise commercial buildings, subways, tunnels, and nuclear power plants.

  • Categories:Cable knowledge
  • Author:
  • Origin:
  • Time of issue:2015-10-26
  • Views:0
Information

In today's industrialized society, energy and information are the two pillars of the society, and the transmission of electric energy and information cannot be separated from wires and cables, especially high-rise commercial buildings, subways, tunnels, and nuclear power plants. In order to meet the requirements of fire prevention and environmental protection regulations in the above-mentioned places, low-smoke, halogen-free, flame-retardant and fire-resistant wires and cables should be laid. As we all know, although ordinary PVC insulated wires and cables have excellent mechanical, electrical and processing properties, their biggest shortcomings are flammability, high heat generation, fast flame propagation speed, and a large amount of toxic, harmful and corrosive when burned. Gas and dense smoke cause "second disasters". These gases and dense smoke not only endanger life safety, but also severely corrode equipment and buildings, and at the same time cause great difficulties for firefighting, rescue and property evacuation. All this makes people realize that in addition to being flame-retardant, cables must also have high temperature resistance, anti-aging, smoke-free, non-toxic and low-corrosion characteristics. Therefore, the development of low-smoke, halogen-free, and non-toxic fire-fighting products has become the current cable A comprehensive development direction of the industry.

Irradiation cross-linked low-smoke halogen-free flame-retardant and wire and cable are made of imported low-smoke halogen-free materials, and the high-energy electron beam generated by an electron accelerator is used to irradiate the cable to make the cable's insulation layer composed of linear molecules. The structure becomes a three-dimensional three-dimensional network structure, forming a three-dimensional lattice smaller than water molecules, forming a dense layer on the surface and inside of the polyethylene, thereby effectively preventing the combination of hydroxide and water molecules. This cross-linking method not only improves This improves the temperature resistance, wear resistance and flame retardancy of the wire and cable, and more importantly, it plays a role in water blocking. This cross-linking method has no high temperature and no water, which can not only cross-link polyethylene, but also improve the flame retardant and electrical properties of the cable. The cable has the characteristics of low smoke, halogen-free, flame retardant, fire resistance and high temperature resistance. The specific performance is as follows: high temperature resistance grade: long-term allowable working temperature of conductor is 135℃ (normal cable is 70℃ or 90℃); good flame retardant performance: bundled burning test is Class A. (Ordinary cable is category C); no smoke and poisonous gas, light transmittance ≥90%, PH value ≥6.0 (ordinary low-smoke halogen-free cable light transmittance ≥60%, PH value ≥4.3); excellent mechanical properties. The number of wear resistance reaches 160,000 times, and the service life exceeds 50 years.

The scope of application includes radiation cross-linked, low-smoke, halogen-free, flame-retardant, and wire and cable. It is suitable for power transmission and distribution systems, control lines and various important places that require flame-retardant, fire-resistant, smoke-free, non-toxic and high-temperature resistance at 10kv and below. It can be widely used in nuclear power plants, power plants, steel mills, oil wells, computer rooms, schools, entertainment venues, crowded places and high-rise buildings.

With the advancement of society, the development of science and the improvement of people’s awareness of environmental protection, the demand for radiation cross-linked low-smoke halogen-free flame-retardant and fire-resistant wires and cables will increase. At the same time, research on new materials that replace copper conductors will also It will gradually deepen, and it is believed that the development of radiation cross-linked low-smoke halogen-free flame-retardant and fire-resistant wires and cables will have very broad prospects.

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