High-strength polytetrafluoroethylene cable film and preparation method thereof

Abstract

The invention relates to a high-strength polytetrafluoroethylene cable film and a preparation method thereof. The preparation method comprises the following steps that polytetrafluoroethylene dispersion resin and auxiliary agent oil are mixed, then powder curing is carried out, the cured powder is put into a pre-pressing forming machine and pressed into a blank, the blank is put into a pushing machine, and extruded into a strip-shaped material strip, a base band is formed by the strip-shaped material strip through rolling equipment, and the base band enters a degreasing stretching drying ovenfor high-temperature setting. According to the preparation method, the production process is simple, the manufacturing process is environment-friendly, the film is stretched, and the internal structure of the film forms a micropore shape, so that the density of the film is reduced, it is ensured that under the conditions of the lower dielectric constant and the dielectric loss, the internal micropore structure of the film is stable through high-temperature setting, the tensile strength of the film is improved, and compared with a common low-density micropore polytetrafluoroethylene film, the film has higher tensile strength and shrinkage resistance.

Description

technical field [0001] The invention relates to the technical field of cable films, in particular to a high-strength polytetrafluoroethylene cable film and a preparation method thereof. Background technique [0002] PTFE film wrapped insulated wire and cable is a kind of high temperature resistant fluoropolymer insulated wire and cable. It has high temperature resistance, corrosion resistance and strong physical and chemical stability. Cable varieties used in special environments. Choose microporous PTFE film for wrapping. There are a large number of irregular micropores inside and on the surface of the film, which makes the tensile strength of microporous PTFE insulation poor, and the resistance to shrinkage at high temperatures is poor. When wrapping cables Accidents such as deformation and breakage are prone to occur, which have a great impact on the cable, resulting in insulation leaks, so further improvement is required. Contents of the invention [0003] The techni...

AI Technical Summary

Problems solved by technology

Choose microporous PTFE film for wrapping. There are a large number of irregular micropores inside and on the surface of the film, which makes the tensile strength of microporous PTFE insulation poor, and the resistance to shrinkage at high temperatures is poor. When wrapping cables It is prone to accidents such as deformation and breakage, which has a great impact on the cable and leads to insulation leaks, so further improvement is needed

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