A low volatile organic gas polyurethane enameled wire and its manufacturing process

Abstract

The invention discloses a manufacturing process of low volatile organic gas polyurethane enameled wire, which comprises the following steps: (1) wire drawing; (2) annealing; (3) painting; (4) baking; (5) cooling; (6) Reel up. The invention also discloses a low volatile organic gas polyurethane enameled wire, which is composed of a metal conductor and a polyurethane insulating layer with self-lubricating properties. The invention introduces a fluorine-containing group into the polyurethane molecular chain of the insulating varnish to form a polyurethane insulating layer with self-lubricating properties, which replaces the traditional lubricating oil layer and does not need to be specially coated with a lubricating layer. The residual volatile gas of the polyurethane insulating layer causes the volatile gas to corrode the contact surface of electronic components in a closed environment, resulting in the loss of control or paralysis of the entire electronic control system. And the problem of being unable to meet the requirements of the sealed electronic components for the volatile organic gas content of the enameled wire.

Description

technical field [0001] The invention relates to the technical field of insulating enameled wires, in particular to a low-volatile organic gas polyurethane enameled wire and a manufacturing process thereof. Background technique [0002] The traditional polyurethane enameled wire is usually a three-layer structure consisting of a metal conductor + polyurethane insulation layer (some enameled wires also include nylon paint as a top coat to increase the slipperiness of the enameled wire) + lubricating oil layer. [0003] The above enameled wire production process mainly includes two processes of wire drawing and enameling. Wire drawing refers to a process of press-processing metal wires through a drawing die at room temperature; the wires are drawn multiple times (large, medium, small, fine or micro) to produce bare wires of specific specifications. conductor wire. Enamelling refers to the process of spraying insulating varnish on the bare conductor wire at high temperature to...

AI Technical Summary

Problems solved by technology

[0010] The traditional three-layer structure, polyurethane enameled wire coated with lubricating oil, there is volatilization of lubricating oil on the surface of the enameled wire and volatile gas remaining in the polyurethane insulating layer, which will cause the volatile gas to be adsorbed on the contact surface of electronic components in a closed environment. Gradually corrode these metal parts, shorten the service life of electronic components, and eventually lead to the loss of control or paralysis of the entire electronic control system

At the same time, there is also the problem of being unable to meet the requirements of the volatile organic gas content of the enameled wire for manufacturers of sealed electronic components or electronic components with high environmental protection requirements, that is, after heating at 150°C for 30 minutes, the total volatile gas content cannot be achieved. ≤20ppm, of which aromatic volatile gas content≤2ppm