Heat-dissipating cable sheath and preparation method thereof
A technology of cable sheathing and thermoforming, which is applied to rubber insulators, organic insulators, etc., and can solve the problems of not meeting the technical requirements of sheathing, poor dispersion of thermally conductive fillers, and decreased mechanical properties of resin cured products.
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[0014] The present invention provides a method for preparing a heat-dissipating cable sheath, which includes:
[0015] (1) Add the thermal conductive filler, organic acid and coupling agent to the solvent to disperse evenly, and then dry until the solvent volatilizes completely, and collect the obtained powder M;
[0016] (2) Mix powder M, EPDM rubber, alumina fiber, polyvinylidene fluoride, dicumyl peroxide, dimethylformamide, carbon black, zinc oxide and barium stearate, and mix Then get the compound rubber;
[0017] (3) The compound rubber is added to the vulcanizer, and the heat-dissipating cable sheath is obtained by extrusion vulcanization and hot pressing. The conditions of extrusion vulcanization include: the temperature of the die is 65-80℃, and the barrel is extruded The temperature of the section is 50-65°C, the temperature of the plasticizing section of the barrel is 60-75°C, and the temperature of the screw is 40-50°C.
[0018] In a preferred embodiment of the present in...
Embodiment 1
[0030] Add silicon carbide, lauric acid and silane coupling agent KH560 to the solvent for uniform dispersion, and then dry until the solvent is completely volatilized, and collect the resulting powder M; combine the powder M, EPDM rubber, alumina fiber, and polyvinylidene fluoride , Dicumyl peroxide, dimethylformamide, carbon black, zinc oxide and barium stearate are mixed, banburying (conditions of banburying include: temperature of 60℃, time of 30min) to obtain compound rubber; The compound rubber is added to a vulcanizer, and subjected to extrusion vulcanization and hot pressing molding (the temperature of hot pressing is 60℃, and the pressure of hot pressing is 20MPa) to obtain a heat-dissipating cable sheath; among them, the conditions of extrusion vulcanization include : The temperature of the die head is 65°C, the temperature of the extrusion section of the barrel is 50°C, the temperature of the plasticizing section of the barrel is 60°C, and the temperature of the screw...
Embodiment 2
[0032] Add boron carbide, stearic acid and silane coupling agent KH792 into the solvent to disperse evenly, then dry until the solvent is completely volatilized, and collect the obtained powder M; combine the powder M, EPDM rubber, alumina fiber, and polyvinylidene fluoride Ethylene, dicumyl peroxide, dimethylformamide, carbon black, zinc oxide and barium stearate are mixed, and mixed (the conditions of the banbury include: temperature of 90℃, time of 60min) to obtain compound rubber ; Put the compound rubber into the vulcanizing machine, after extrusion vulcanization and hot pressing molding (the temperature of hot pressing is 80 ℃, the pressure of hot pressing is 40 MPa), the heat dissipation cable sheath is obtained; among them, the conditions of extrusion vulcanization Including: the temperature of the die head is 80°C, the temperature of the extrusion section of the barrel is 65°C, the temperature of the plasticization section of the barrel is 75°C, and the temperature of t...
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Abstract
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