It still has excellent insulation and stable electrical properties in high temperature, high pressure, high speed, high humidity and other environments. Generally, the volume resistivity can reach 1015-1016 megaohms, which can maintain a small dielectric constant and dielectric loss over a wide range of temperatures and frequencies. PAEK is an insulating material for wires, and it is ideal for manufacturing heat-resistant coated wires. This wire has better solvent resistance and stress crack resistance than the currently widely used Teflon insulated wires.