... its middle layer and polyamide film, polyester film, PTFE film etc. Our film heater is made from etched ... polyamide film, polyester film, PTFE film and silicone rubber /fiberglass film as its insulated surfaces. The film heaters ... watt densities within the heater area.Polyamide film is thin lightweight organic polymer, which provides ... electronic components.8)Packaging, fusing, and splicing equipment.