Cable inner shielding material with copper damage prevention function, and preparation method thereof

Abstract

The invention relates to a cable inner shielding material with a copper damage prevention function, and a preparation method thereof. The shielding material is prepared from, by weight, 30 to 35 partsof EVA, 5 to 8 parts of white oil, 0.5 to 4 parts of a dispersant, 0.5 to 3 parts of a cross-linking agent, 10 to 12 parts of a plasticizer, 0.6 to 0.8 part of an ionic liquid surfactant, 30 to 32 parts of conductive carbon black, 0.1 to 0.5 part of an antioxidant and 12-18 parts of an anti-bonding agent. The manufacturing effect of the shielding material product is effectively improved, the energy consumption is reduced, and the positive benefits of energy conservation and environmental protection are achieved.

Description

technical field [0001] The invention relates to an inner shielding material for cables with the function of preventing copper damage and a preparation method thereof. Background technique [0002] At present, the inner shielding material for cables with anti-copper damage function is widely used, but there are many deficiencies in the manufacturing process. [0003] The conventional shielding material feeding method is: the powder is directly put into the feed port of the screw conveyor in proportion to the powder, and then transported to the internal mixer through the screw conveyor while mixing the material and mixed with the liquid material directly into the internal mixer. Although the whole process of banburying is simple to operate, in actual use, it is found that the mixing of each component in the powder is not uniform enough, which affects the subsequent banburying effect; at the same time, the entrance of the screw conveyor is directly connected to the silo when re...

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Problems solved by technology

[0003] The conventional shielding material feeding method is: the powder is directly put into the feed port of the screw conveyor in proportion to the powder, and then transported to the internal mixer through the screw conveyor while mixing the material and mixed with the liquid material directly into the internal mixer. Although the whole process of banburying is simple to operate, in actual use, it is found that the mixing of each component in the powder is not uniform enough, which affects the subsequent banburying effect; at the same time, the entrance of the screw conveyor is directly connected to the silo when receiving materials , while the general silo is located on the superstructure frame layer in the workshop, and the screw conveyor is located on the ground below, with a height difference of at least five or six meters, so when the powder falls vertically into the feeding port of the screw conveyor, due to During the feeding process, the powder is in free fall, so it will inevitably produce a certain impact force, which will cause the powder of different densities to fall in layers after the powder is flying, which will further affect the uniformity of its mixing;

[0004] In the conventional granulation process, the hot cutting method, that is, after the screw extruder extrudes the molten material, the cutter cuts it to make it into small particles and then cools it down. However, because the EVA in the shielding material has Certain elasticity and viscosity, so it has a certain viscosity in the hot melt state, and it is easy to adhere to the cutter, thus affecting the granulation effect; at the same time, the conventional granulation cooling method is air cooling, and the cooling effect is not good; for Therefore, some companies have developed a water-cooling method, but the conventional water-cooling method uses cooling water showering, which not only consumes a lot of water resources, but the cooling effect is improved compared with air-cooling, but it still cannot achieve the desired effect.

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