High heat resistance type weldable polyesterimide enameled wire and production method thereof

Abstract

The invention discloses a high heat resistance type weldable polyesterimide enameled wire. The high heat resistance type weldable polyesterimide enameled wire comprises a conductor core, and an insulating coating for covering the conductor core. The insulating coating is made from imide-modified polyesterimide insulating varnish through high-temperature baking. The polyesterimide insulating varnish comprises the following components: polyesterimide resin 22wt%-39wt%, and a mixed solvent of cresol and xylene 61wt%-78wt%. The high heat resistance type weldable polyesterimide enameled wire provided in the invention has advantages of high heat resistance and high electrical performance, the thermal level can reach up to a level of 200, the softening breakdown temperature is in the range from 290 DEC G to 330 DEC G, and the direct welding function can be realized at the same time, the mechanical process of the chemical stripping process can be omitted, and the coil winding machining efficiency can be greatly improved. Meanwhile, the invention also discloses a production method of the above-mentioned high heat resistance type weldable polyesterimide enameled wire.

Description

technical field [0001] The invention relates to an insulated wire and cable, in particular to a high heat-resistant weldable polyesterimide enameled wire and a production method thereof. Background technique [0002] The thermal class of existing solderable enameled wire products is usually 180, the minimum soldering temperature is 450°C, and the minimum softening and breakdown temperature is 265°C. The long-term thermal life and electrical insulation performance are low, which cannot meet the use of self-priming magnetic water pumps for coffee machines. Require. Existing composite coated enameled wires with higher thermal grades (such as above 200 grades) have a softening breakdown temperature of over 320°C, but they do not meet the requirements for direct welding of end wires, and the production and processing efficiency is low. Contents of the invention [0003] In view of the above-mentioned current state of the art, the first technical problem to be solved by the pre...

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Problems solved by technology

[0002] The thermal class of existing solderable enameled wire products is usually 180, the minimum soldering temperature is 450°C, and the minimum softening and breakdown temperature is 265°C. The long-term thermal life and electrical insulation performance are low, which cannot meet the use of self-priming magnetic water pumps for coffee machines. Require

Existing composite coated enameled wire with higher thermal class (such as above 200) has a softening breakdown temperature of over 320°C, but it does not meet the requirements for direct welding of end wires, and the production and processing efficiency is low

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