Common cable materials are modified in various ways to achieve heat resistance:

1.Heat-resistant modification of rubber materials

Because of its poor heat resistance, rubber materials have less room to increase the working temperature. Ordinary rubber can only reach 90°C after adding more heat stabilizers and cross-linking treatment, so it cannot be called a heat-resistant cable. However, EPDM rubber can be modified to increase the temperature resistance level to 135°C. In addition, it has better insulation properties, so it has a better development prospect in rubber.

2. Modification of PVC cable

The operating temperature of ordinary PVC cables is 70°C. However, the high miscibility of PVC cable material makes it possible to modify it. Filling with sufficient heat stabilizer can increase the heat resistance of PVC from 70°C to 90°C or 105°C.

3.Modification of polyethylene cable

The plasticity of polyethylene material is better, but its fillability is poor, so it cannot be filled with a heating stabilizer to increase the heat-resistant temperature. But another cross-linking method-radiation cross-linking modification, can greatly increase the working temperature of polyolefin (mainly polyethylene). The irradiated insulating material can be different according to the conditions, and the temperature can reach 105 ℃, 125℃, 135℃, 150℃, etc.