Rubber powder composite material with electromagnetic shielding effectiveness, and preparation method thereof
A composite material and electromagnetic shielding technology, applied in the field of electromagnetic shielding materials, can solve the problems of easily causing pollution, high manufacturing cost and complicated process, and achieve the effects of reducing pollution, low manufacturing cost and simple preparation method.
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Embodiment 1
[0019] Fully disperse the chopped carbon fiber in the beater, filter the dispersion and fully dry it to obtain chopped and dispersed carbon fiber monofilament with a fiber diameter of 3 μm and a length of 1 mm; the particle size of the rubber powder is 30 mesh, and the Add 100 parts by weight of rubber powder to the mixer or open mill, add 10 parts by weight of softener, mix for 5 minutes, then add 3 parts of chopped carbon fiber, 0.74 parts of accelerator and 2 parts of sulfur in sequence, and then mix for 20 minutes , after uniform mixing, tableting is obtained to obtain the mixed rubber. The mixed rubber was parked at room temperature for 24 hours, and then vulcanized and molded on a 50T flat vulcanizing machine under the vulcanization condition of 140°C×20min to obtain a product.
[0020] According to the performance test, the tensile strength of the electromagnetic shielding rubber powder composite material is 4.45MPa, and the electromagnetic shielding efficiency is 48.1-...
Embodiment 2
[0022] Fully disperse the chopped carbon fiber in the beater, filter the dispersion and fully dry it to obtain chopped and dispersed carbon fiber monofilament with a fiber diameter of 6 μm and a length of 3 mm; the particle size of the rubber powder is 60 mesh, and the Add 100 parts by weight of rubber powder to the mixer or open mill, add 10 parts by weight of softener, mix for 5 minutes, then add 5 parts of chopped carbon fiber, 0.74 parts of accelerator and 2 parts of sulfur in turn, and then mix for 20 minutes , after uniform mixing, tableting is obtained to obtain the mixed rubber. The mixed rubber was parked at room temperature for 24 hours, and then vulcanized and molded on a 50T flat vulcanizing machine under the vulcanization condition of 140°C×20min to obtain a product.
[0023] According to the performance test, the tensile strength of the electromagnetic shielding rubber powder composite material is 4.86MPa, and the electromagnetic shielding effectiveness is 55.3-6...
Embodiment 3
[0025] Fully disperse the chopped carbon fiber in the beater, filter the dispersion and fully dry it to obtain chopped and dispersed carbon fiber monofilament with a fiber diameter of 10 μm and a length of 5 mm; the particle size of the rubber powder is 100 mesh, and the Add 100 parts by weight of rubber powder to the mixer or open mill, add 10 parts by weight of softener, mix for 5 minutes, then add 7 parts of chopped carbon fiber, 0.74 parts of accelerator and 2 parts of sulfur in sequence, and then mix for 20 minutes , after uniform mixing, tableting is obtained to obtain the mixed rubber. The mixed rubber was parked at room temperature for 24 hours, and then vulcanized and molded on a 50T flat vulcanizing machine under the vulcanization condition of 140°C×20min to obtain a product.
[0026] According to the performance test, the tensile strength of the electromagnetic shielding rubber powder composite material is 5.6MPa, and the electromagnetic shielding efficiency is 63.5...
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Abstract
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