Manufacturing method of multi-layer insulated wire insulated with biopolyester resin and Multi-layer insulated wire insulated with biopolyester resin using the same

摘要

The present invention relates to a method to manufacture a multi-layered insulated wire using biopolyester resin as the insulation, manufactured through the same process. The method includes: a first step of separating glycerol from a biodiesel byproduct; a second step of separating bio 1,3-propanediol by fermenting the glycerol; a third step of manufacturing biopolyester resin from the bio 1,3-propanediol through an ester exchange reaction step and a poly condensation step; a fourth step of obtaining a mixture, made by mixing the biopolyester resin with an antioxidant and paint, and then fusing and mulling the mixture to manufacture biopolyester pellets; and a fifth step of forming at least two insulating layers on the edge of a conductor by extruding the biopolyester pellets, and then forming the outermost insulating layer on the insulating layers by extruding polymer resin pellets. According to the present invention, the method is capable of easily manufacturing a multi-layered insulated wire satisfying demands for environmental protection while at the same time having necessary properties of wires and coils for electronic devices such as heat resistance, flexibility before and after heating, and scratch resistance.