Preparation method of polyvinyl chloride cable material

Abstract

The invention provides a preparation method of a polyvinyl chloride cable material, and belongs to the field of polymer composite material preparation. The method comprises the following steps: adding 30 to 37 parts of polyvinyl chloride resin, 8 to 12 parts of dioctyl terephthalate, 3 to 5 parts of linear low-density polyethylene, and 0.5 to 1.0 part of epoxy soybean oil into a high-speed mixer, mixing the materials mentioned above for 5 minutes under a speed of 300 rpm, adding 7 to 13 parts of calcium carbonate, 0.6 to 1.2 parts of calcium-zinc stabilizing agent, 0.1 to 0.4 part of dicumyl peroxide, 0.6 to 1.5 parts of antimony trioxide, and 0.02 to 0.1 part of stearic acid into the mixer when the temperature reaches 60 DEG C, mixing for 10 minutes in the high-speed mixer under a speed of 600 rpm, taking out the mixed materials from the high-speed mixer when the temperature reaches 120 DEG C, putting the mixed material into an internal mixer to carry out an internal mixing treatment, taking out the mixture when the temperate reaches 150 DEG C, putting the mixture into a single-screw extruder to carry out an extruding treatment, then carrying out a granulating treatment after the extrusion treatment, drying, and finally packing. The polyvinyl chloride cable material has the advantages of high strength and excellent electrical property, and can sustain a temperature as high as 105 DEG C.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material preparation, and in particular relates to a preparation method of polyvinyl chloride cable material. Background technique [0002] Polyvinyl chloride is a thermoplastic with excellent performance. It is widely used in the wire and cable industry due to its convenient processing, excellent flame retardancy and low price. By adjusting the content of plasticizer, polyvinyl chloride cables can be made into wire and cable sheaths (also known as outer sheaths) and core wire materials with different hardness, but there are active (live) chlorine atoms in the polyvinyl chloride molecular chain, in There is a tendency of dehydrochlorination in the natural state, and this tendency is more obvious in a heated or high-temperature environment. Therefore, PVC materials are generally used in low temperature ranges, such as 70°C, 90°C, etc., rarely There is a higher temperature rating. China ...

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Problems solved by technology

By adjusting the content of plasticizer, polyvinyl chloride cables can be made into wire and cable sheaths (also known as outer sheaths) and core wire materials with different hardness, but there are active (live) chlorine atoms in the polyvinyl chloride molecular chain, in There is a tendency of dehydrochlorination in the natural state, and this tendency is more obvious in a heated or high-temperature environment. Therefore, PVC materials are generally used in low temperature ranges, such as 70°C, 90°C, etc., rarely Has a higher operating temperature rating

China Invention Patent Publication No. CN100578687A recommends an environmentally friendly lead-free and cadmium-free 70°C PVC sheath material. However, due to more and more frequent extreme weather in recent years, high temperatures can often burn the outside of the cable, so this patent solution Unable to meet requirements due to low temperature resistance class

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