Teflon electrothermal tube

Abstract

The invention discloses a teflon-wrapped electrothermal tube. The tube comprises an electrothermal tube which is intertwined and wrapped with a teflon dispersion resin film. The teflon dispersion resin film is a modified teflon material. Temperature tolerance of the teflon dispersion resin film is 260-350 DEG C. The teflon electrothermal tube has high temperature resistance and corrosion resistance, is convenient to machine, has uniform surface thickness and has good thermal conductivity. The resin film clings closely to the electrothermal tube.

Description

technical field [0001] The invention belongs to the field of processed materials, in particular to a polytetrafluoroethylene-wrapped electric heating tube. Background technique [0002] Polytetrafluoroethylene (PTFE) is a polymer compound whose molecular main chain is completely covered by fluorine atoms. Because the C-F bond has high dissociation energy, it has excellent corrosion resistance, high and low temperature resistance, and a wide range of operating temperatures. advantage. These advantages make products made of PTFE resin widely used in various highly corrosive, high temperature or low temperature environments. [0003] At present, many structures of electric heating rods on the market are exposed without any external processing. The second is to cover the surface of electric heating rods with polytetrafluoroethylene tubes. This method has the following disadvantages: First, due to the instability of the inner diameter of the PTFE tube, it is easy to cause the P...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: First, due to the instability of the inner diameter of the PTFE tube, it is easy to cause the PTFE tube to burst after being pulled in the process of inserting it, and the inner wall of the PTFE tube is not close to the electric heater. Great

Second, the wall thickness of the polytetrafluoroethylene tube is generally ≥0.75mm, which has the disadvantage of unfavorable heat conduction

Third, due to the limitations of PTFE itself, although it can withstand temperatures below 260°C, it cannot be used in detection fields higher than 260°C in practical applications.