Antistatic flame-retardant composite material for coal mines and preparation method of antistatic flame-retardant composite material

Abstract

The invention discloses an antistatic flame-retardant composite material for coal mines and a preparation method of the antistatic flame-retardant composite material. The antistatic flame-retardant composite material comprises the following components in parts by weight: 100 parts of polyvinyl chloride (PVC) resin, 5-20 parts of acrylonitrile-butadiene-styrene copolymer (ABS), 2-10 parts of compatibilizer, 0.5-2 parts of carbon nano-tubes, 0.5-2 parts of graphene, 2-6 parts of thermal stabilizer, 1-2 parts of lubricant and 2-10 parts of processing aid. The preparation method comprises the following steps: preparing a conducting filler / PVC composite powder material from a mixture of the carbon nano-tubes and the graphene and part of the PVC resin in proportion; performing high-speed mixing on the obtained conducting filler / PVC composite powder material, the residual PVC resin, the ABS, the compatibilizer, the thermal stabilizer, the lubricant and the processing aid to obtain a compound; and putting the mixed compound into a conical twin-screw extruder, setting temperature section by section, and pelleting by extruding, thereby obtaining the antistatic flame-retardant composite material for the coal mines. The prepared PVC composite material has relatively high mechanical properties, excellent antistatic property and flame retardance, is a high-polymer composite material with good processibility, and can be used underground in the coal mines.

Description

technical field [0001] The invention relates to the technical field of plastic modification, in particular to a method for preparing an antistatic and flame retardant composite material used in coal mines. Background technique [0002] PVC materials without plasticizers have excellent properties such as flame retardant, high mechanical strength, and corrosion resistance. However, due to their high electrical insulation, static electricity is easy to accumulate on the surface, making it difficult to use them in coal mines containing dust and flammable gases. In order to solve this problem, it is necessary to improve the antistatic properties of PVC materials. Generally considered 10 8 The surface resistance of Ω is the minimum to prevent the accumulation of static electricity. AQ1071-2009 "Safety Technical Requirements for Non-metallic Gas Conveying Pipes Used in Coal Mine" issued by the State Administration of Work Safety in 2009 pointed out that the surface resistance of t...

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Problems solved by technology

[0008] The use of organic antistatic agents in the above method is greatly affected by the humidity of the environment, resulting in certain potential safety hazards in its application in underground coal mines

Applying an antistatic coating on the inner and outer surfaces of the pipe cannot solve the problem of permanent antistatic of PVC materials. With the wear or damage of the coating, the composite material will lose its antistatic performance

Adding a large amount of carbon filler can solve the problem of permanent antistatic of PVC composite materials, but the difficult processing characteristics of materials and the poor flame retardancy of materials after adding plasticizers will become the main obstacles restricting the application of related materials

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