Method for manufacturing smokeless incombustible temperature-resistant tetrafluoroethylene electric wire

A technology of polytetrafluoroethylene and its production method, which is applied in the direction of cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of insufficient density, insufficient smoothness, uneven thickness, etc., achieve enhanced voltage resistance performance, and simple production process , smooth surface effect

CN101533688AInactive Publication Date: 2009-09-16四会市生料带厂有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-09-16
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment 1

[0038] (1) Wrap the polytetrafluoroethylene colored raw material tape for winding and sintering on the bare wire. The polytetrafluoroethylene colored raw material tape for winding and sintering is wrapped on the nickel-plated copper stranded wire through the wrapping device, the wrapping angle is 30°, the overlapping rate is controlled at 100%, and the drawing speed is 200r / min. After the wrapping is completed, shaping is carried out to improve the compactness of the insulating layer and further improve the breakdown strength. The shaping temperature is 100°C.

[0039](2) Carry out sintering treatment. Sinter the wrapped bare wire through a sintering furnace, the sintering temperature is controlled at 380°C, the take-up speed is 200r / min, and the drawing speed is 200r / min.

Embodiment 2

[0041] (1) Wrap the polytetrafluoroethylene colored raw material tape for winding and sintering on the bare wire. The polytetrafluoroethylene colored raw material tape for winding and sintering is wrapped on the nickel-plated copper stranded wire through the wrapping device, the wrapping angle is 50°, the overlapping rate is controlled at 200%, the wrapping speed is 300r / min, the extraction 300r / min. After the wrapping is completed, shaping is carried out to improve the compactness of the insulating layer and further improve the breakdown strength. The shaping temperature for shaping is 200°C.

[0042] (2) Carry out sintering treatment. Sinter the wrapped bare wire through a sintering furnace, the sintering temperature is controlled at 400°C, the wire take-up speed is 300r / min, and the drawing speed is 300r / min.

Embodiment 3

[0044] (1) Wrap the polytetrafluoroethylene colored raw material tape for winding and sintering on the bare wire. The bare wire is preferably nickel-plated copper stranded wire. After the copper is nickel-plated, it can prevent rust and aging, and can also greatly improve the strength, corrosion resistance and high temperature resistance of copper. The polytetrafluoroethylene colored raw material tape for winding and sintering is wrapped on the nickel-plated copper stranded wire through the wrapping device, the wrapping angle is 40°, the overlapping rate is controlled at 150%, the wrapping speed is 250r / min, the extraction 250r / min. After the wrapping is completed, shaping is carried out to improve the compactness of the insulating layer and further improve the breakdown strength. The shaping temperature for shaping is 150°C.

[0045] (2) Carry out sintering treatment. Sinter the wrapped bare wire through a sintering furnace, the sintering temperature is controlled at 390°C,...