DUAL-HEAT SOURCE SELF-CONTROLLED TEMPERATURE HEATING PLASTIC PIPE OF COMPOSITE PTC ELECTRICALLY-CONDUCTIVE POLYMER MATERIAL FILM

摘要

A dual-heat source self-controlled temperature heating plastic pipe of a composite PTC electrically-conductive polymer material film comprising an electrically insulating pipe (1), a PTC electrically-conductive polymer material film (3), electrically connected wire electrodes (2) and a plastic pipe (4), wherein the wire electrodes (2) are fixed in a winding manner to the outer wall of the electrical insulating pipe (1), the PTC electrically-conductive polymer material film (3) is evenly distributed, extruded, coated and fixed to the wire electrodes (2) to form a tubular layer coated with the PTC electrically-conductive polymer material film (3) having a good electric connection between the PTC electrically-conductive polymer material film (3) and the wire electrodes (2), and the tubular layer coated with the PTC electrically-conductive polymer material film (3) and the wire electrodes (2), are at least compounded with the electrically insulating plastic pipe (4) manufactured by an extrusion process. When an electric current passes, the PTC electrically-conductive polymer material works as a heating body to transfer electric energy into heat due to Joule heat.