Method for manufacturing smokeless incombustible temperature-resistant tetrafluoroethylene electric wire

Abstract

The invention provides a method for manufacturing smokeless incombustible temperature-resistant tetrafluoroethylene electric wire, comprising the steps of uniformly and seamlessly winding tetrafluoroethylene colour raw material belt for winding and sintering on nickel plated copper stranded wire according to a certain winding angle, improving the apparent density of winding belt by a shaping technology, and finally sintering so as to obtain the smokeless incombustible temperature-resistant tetrafluoroethylene electric wire. The invention has the advantages that 1. the thickness is uniform, the surface is smooth, and the compactness is high; 2. the manufacturing process is simple and the operation is simple and convenient; 3. the manufacturing cost is reduced by 50% compared with the manufacturing method in a paste extrusion manner; and 4. the breakdown resistant voltage can be 6000-8000V, the used rated voltage is 600V, the temperature range for long term usage is -65 to 260 DEG C, the limited oxygen index is more than 95, and the electric wire is incombustible and resistant to strong acids, strong alkalis and aging.

Description

technical field [0001] The invention relates to the field of wire manufacturing, in particular to a method for manufacturing a smokeless, non-combustible, temperature-resistant polytetrafluoroethylene wire. Background technique [0002] At present, wires mainly include bare wires and insulated wires. The structure of an insulated wire consists of an insulating layer wrapped around a metal core conductor. Most of the insulating layer is made of flame-retardant (fire-resistant) plastic; according to the different types of insulating materials, insulated wires can be divided into the following categories: polyethylene (XLPE) wires, polyvinyl chloride (PVC) wires and ethylene-propylene rubber (EPR) wires etc. [0003] Due to the high bond energy of fluorine-carbon bonds and the shielding effect of fluorine atoms, PTFE has superior electrical insulation, voltage resistance, excellent chemical corrosion resistance, dielectric properties and weather resistance, and has non-combus...

AI Technical Summary

Problems solved by technology

This processing method has the following disadvantages: 1. Imported raw materials with high compression ratio must be used, and the concentricity is difficult to control. It can only be compensated by increasing the wall thickness, resulting in high production costs; 2. It will be affected by the fluctuation of traction frequency and the quality of raw materials. Due to the influence of different factors, the smoothness of extrusion is not enough; 3. The paste-like extrusion processing method is limited by the weight of the blank, and the wire must be cut when changing the blank, resulting in insufficient continuous length of the wire; 4. Extruded The surface of the insulating layer has poor quality problems such as rough surface and uneven thickness; 5. The density is not enough, and the cross-section of the extruded insulating layer occasionally has pinholes and bubbles

Due to the existence of the above problems, the overall performance of polytetrafluoroethylene (PTFE) wires is unstable, the safety is low, the cost is too high, and it is difficult to mass-produce and popularize and apply among the people.

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