polymer materials can be irradiated to produce radiation crosslinking, grafting, polymerization, degradation and other reactions. These reactions can be used to prepare many new products and new materials, heat shrinkable materials, new engineering materials, PTC materials, high water absorbent resins, functional films, ultrafine powders, etc. These products are used in the construction industry, household appliances, electronic power, automation instrumentation, Mechatronics equipment, automobiles, shipbuilding, petrochemicals and many other fields related to the livelihood of the people. Crosslinking of the polymer can be achieved chemically or by irradiation. Among them, chemical crosslinking is a traditional technology, which uses conductive heat to react high polymer and crosslinking agent to form crosslinking. Although the process technology of chemical crosslinking method has become more and more perfect, it is difficult to use it to produce thin insulated wire and cable. It is easy to produce defects such as eccentricity, melt flow, breakage or pinholes, and the production speed is low and the energy consumption is large. For some plastics with good characteristics (such as polyvinyl chloride, fluoroplastics) can not be used to achieve the purpose. Compared with chemical crosslinking, irradiation crosslinking has great advantages.

1) Improve the insulation material heat resistance;

2) Electrical performance is excellent;

3) Improve flame retardancy;

4) some almost can not be chemically cross-linked materials, such as polyvinyl chloride, fluoroplastics, high density polyethylene, polypropylene, etc. can be used electron irradiation to get cross-linked;

5) The production efficiency is high;

6) Irradiated cross-linked wires are of good quality, insulating layer cross-linking uniformity is good, no scorching, no bubbles; insulating layer does not stick conductor, easy to peel off, mechanical properties are good, and resistance to stress cracking.

7) irradiation at room temperature, irradiation reaction is easy to control, reproducibility is good.