Weather-resistant and ageing-resistant rubber track liner plate and preparation method thereof

Abstract

The invention discloses a weather-resistant and ageing-resistant rubber track liner plate and a preparation method thereof. The weather-resistant and ageing-resistant rubber track liner plate is prepared from the following raw materials in part by weight: 100 parts of chlorinated polyethylene, 8 to 12 parts of magnesium oxide, 1 to 3 parts of stabilizer, 2.5 to 3.5 parts of dicumyl peroxide, 1.5 to 2.5 parts of triallyl isocyanurate, 40 to 60 parts of carbon black, 10 to 30 parts of calcium carbonate, 6 to 8 parts of epoxy soybean oil, 10 to 15 parts of trioctyl trimellitate and 1 to 3 parts of paraffin. The preparation method comprises the following steps of: putting the chlorinated polyethylene, the magnesium oxide, the stabilizer, the carbon black, the paraffin, the calcium carbonate, the epoxy soybean oil, the trioctyl trimellitate and the triallyl isocyanurate into an internal mixer in turn to perform rubber mixing and back rubber mixing, and then pressing the mixture into flaky rubber sheets; adding the flaky rubber sheets into the internal mixer, adding the dicumyl peroxide into the internal mixer to perform mixing and back rubber mixing, and then pressing the mixture into a flaky mixing material; and performing press vulcanization molding to the mixing material so as to prepare the weather-resistant and ageing-resistant rubber track liner plate.

Description

technical field [0001] The invention relates to the technical field of rubber products, in particular to a rubber backing plate used under railway concrete sleepers and a preparation method thereof. Background technique [0002] The railway track rubber backing plate is an elastic pad used between the steel rail and the concrete sleeper or underground. Its main function is to elastically combine the steel rail and the sleeper, isolate the vibration and impact caused by the passing of the vehicle, and insulate the signal at the same time. The railway track rubber backing plate is used at the bottom of the pillow and needs to bear the force of the train locomotive wheel. At present, with the continuous speed up of the railway, the rubber backing plate is required to be improved in terms of material selection and structure to adapt to the high-speed operation of the vehicle, and Because the rubber backing board needs to be used in the open air for a long time, it is not only re...

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Problems solved by technology

The natural rubber backing plate has good mechanical properties and has excellent elasticity, cold resistance and insulation properties, but its heat resistance and weather resistance are poor, so the service life is short when exposed to the air for a long time; the heat resistance and resistance of the styrene-butadiene rubber backing Although the weather performance is improved compared with the natural rubber backing plate, it is still difficult to withstand the harsh environment of long-term wind and sun; butadiene rubber has excellent wear resistance, cold resistance and elasticity, but its processing performance is poor, so it is generally required to be used with Natural rubber and styrene-butadiene rubber are used together; although chloroprene rubber has excellent weather resistance, it is poor in cold resistance, so it is used less; EPDM rubber has excellent ozone resistance and weather resistance, and is heat-resistant and cold-resistant And the electrical insulation is very good, it is one of the best rubber types, but the tensile strength is low, and the price is relatively expensive, so it is not conducive to popularization and use

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