A kind of preparation method of ethylene-propylene insulation material for medium voltage cable
An ethylene-propylene rubber insulation and medium-voltage technology, applied to rubber insulators, organic insulators, etc., can solve the problem of unspecified particle size of medium-voltage ethylene-propylene insulating material fillers, insignificant anti-aging effect of ethylene-propylene rubber, and compatibility of plastics and rubbers In order to ensure the excellent performance of rubber, excellent heat aging performance and excellent processing performance
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Embodiment 1
[0039] A preparation method of a medium-voltage ethylene-propylene rubber insulating material, the process steps are as follows:
[0040] A mixing
[0041] a) Put 50 parts of EPDM rubber and 50 parts of ethylene butadiene rubber into the internal mixer, mix at 90°C, and mix evenly;
[0042] b) Then put 10 parts of active agent and 60 parts of filler into the internal mixer, and mix evenly.
[0043] c) Put 3 parts of paraffin wax, 20 parts of antioxidant, 1.5 parts of coupling agent, 10 parts of plasticizer, and 20 parts of reinforcing agent into the internal mixer, and mix evenly.
[0044] d) Then put 3 parts of cross-linking agent and 2 parts of cross-linking auxiliary agent into the internal mixer, knead for 58s, and then glue the internal mixer to obtain the rubber compound.
[0045] B filter gel
[0046] The rubber material is turned over on a three-roller laminator, and then filtered through a rubber filter. The filter screen is four layers, and the temperature of the ...
Embodiment 2
[0050] A preparation method of a medium-voltage ethylene-propylene rubber insulating material, the process steps are as follows:
[0051] A mixing
[0052] a) Put 30 parts of EPDM rubber and 30 parts of ethylene-butadiene rubber into the internal mixer, mix at 80°C, and mix evenly;
[0053] b) Then put 4 parts of zinc oxide and 1 part of stearic acid, 20 parts of talcum powder and 30 parts of kaolin into the internal mixer, and mix evenly.
[0054] c) Put 2 parts of paraffin wax, 10 parts of antioxidant, 0.5 parts of coupling agent, 5 parts of plasticizer, and 10 parts of reinforcing agent into the internal mixer, and mix evenly.
[0055] d) Then put 2 parts of cross-linking agent and 1 part of cross-linking auxiliary agent into the internal mixer, knead for 55s, and then glue the internal mixer to obtain the rubber compound.
[0056] B filter gel
[0057] The rubber material is turned over on a three-roller laminator, and then filtered through a rubber filter. The filter scr...
Embodiment 3
[0066] A preparation method of a medium-voltage ethylene-propylene rubber insulating material, the process steps are as follows:
[0067] A mixing
[0068] a) Put 70 parts of EPDM rubber and 70 parts of ethylene-butadiene rubber into the internal mixer, mix at 100°C, and mix evenly;
[0069] b) Then put 10 parts of zinc oxide and 3 parts of stearic acid, 40 parts of calcium carbonate and 90 parts of kaolin into the internal mixer, and knead evenly.
[0070] c) Put 8 parts of paraffin wax, 20 parts of antioxidant, 3 parts of coupling agent, 15 parts of trioctyl trimellitate, and 35 parts of white carbon black into the internal mixer, and mix evenly.
[0071] d) Then put 5 parts of cross-linking agent and 3 parts of cross-linking auxiliary agent into the internal mixer, knead for 65 seconds, and then glue the internal mixer to obtain the rubber compound.
[0072] B filter gel
[0073] The rubber material is turned over on a three-roller laminator, and then filtered through a ...
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