High-mechanical-strength cable sheath and preparation method thereof
A technology of mechanical strength and cable sheath, applied in the field of high mechanical strength cable sheath and its preparation, can solve the problems of reduced service life, complicated replacement, and increased use cost, etc.
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[0012] The present invention provides a method for preparing a high mechanical strength cable sheath, the preparation method comprising:
[0013] Modified PTFE resin, EPDM rubber, polyisobutylene rubber, graphite, silicon dioxide, dibutyl phthalate, polyethylene glycol, epoxidized triglyceride, citrate, Vulcanization accelerator TMTD and styrene according to 100: 20-30: 5-10: 30-40: 10-15: 25-35: 3-5: 6-10: 1-5: 3-5: 5-15 The weight ratio is mixed and kneaded to obtain a mixture M1, and the mixture M1 is extruded, granulated, and processed;
[0014] Wherein, the modified polytetrafluoroethylene resin is made of zinc oxide, alumina fiber, glass fiber, chlorinated paraffin, polyacrylamide, trimethylhexadecyl ammonium bromide and trimethyl octadecyl chloride Ammonium modification obtained.
[0015] In the above technical solution, the conditions of the kneading can be selected within a wide range, but in order to further improve the weather resistance and electromagnetic shield...
preparation example 1
[0031] 1) Zinc oxide, alumina fiber, glass fiber, chlorinated paraffin, polyacrylamide, trimethylhexadecylammonium bromide and trimethyloctadecylammonium chloride were mixed, stirred at 3000rpm for 50min, and then Add polytetrafluoroethylene ball mill to obtain a mixture; used polytetrafluoroethylene, zinc oxide, aluminum oxide fiber, glass fiber, chlorinated paraffin, polyacrylamide, trimethyl cetyl ammonium bromide and trimethyl octadecyl ammonium The weight ratio of alkyl ammonium chloride is 100:5:3:5:10:3:1:3;
[0032] 2) The mixture was cold-pressed at a pressure of 40 MPa and 20°C for 60 minutes; then, the temperature was raised from room temperature 20°C to 180°C at a rate of 50°C / h, and then the temperature was raised at a rate of 20°C / h to 350°C and kept at 350°C for 2 hours; finally, the modified polytetrafluoroethylene for cables was obtained by cooling to 20°C at room temperature for sintering and solidification at a cooling rate of 50°C / h to 30°C. for W1;
[00...
preparation example 2
[0036] 1) Zinc oxide, alumina fiber, glass fiber, chlorinated paraffin, polyacrylamide, trimethylhexadecylammonium bromide and trimethyloctadecylammonium chloride were mixed, stirred at 4000rpm for 40min, and then Add polytetrafluoroethylene ball mill to obtain a mixture; used polytetrafluoroethylene, zinc oxide, aluminum oxide fiber, glass fiber, chlorinated paraffin, polyacrylamide, trimethyl cetyl ammonium bromide and trimethyl octadecyl ammonium The weight ratio of alkyl ammonium chloride is 100:8:5:8:13:6:3:6;
[0037] 2) The mixture was cold-pressed for 50 minutes at a pressure of 45 MPa and 25°C; then, the temperature was raised from 25°C to 180°C at a rate of 55°C / h, and then the temperature was raised at a rate of 25°C / h to 350°C and kept at 350°C for 3 hours; finally, the modified polytetrafluoroethylene for cables was obtained by sintering and solidifying at a cooling rate of 55°C / h to 40°C, then cooling to room temperature of 30°C, and grinding. for W2;
[0038] ...
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