... wire, which make it has a good insulating effect, a long life. 2. Due to the good insulating effect of aluminum film layer ... , it's heat-resistant temperature can be 20 degrees higher than the copper wire; ... polyesterimide over-coated with polyamide-imide enamelled round aluminum wire Insulation material: Polyester,Polyester-imide,Polyesteramide-imide,Polyimide, ...