Modified composite cable sheath material and preparation method thereof

Abstract

The invention discloses a modified composite cable sheath material which is prepared from the following raw materials in parts by weight: 30-40 parts of chlorosulfonated polyethylene, 20-30 parts of crosslinked insulation polyethylene, 15-20 parts of modified nano kaolin, 0.8-1.3 parts of dibenzothiazyl disulfide, 1-3 parts of zinc oxide, 1-2 parts of zinc dimethyldithiocarbamate, 0.8-1.5 parts of anti-aging agent 4010NA, 40-50 parts of high-wear-resistance carbon black, 20-30 parts of calcined argil, 15-25 parts of nano calcium carbonate, 0.5-2 parts of dioctyl phthalate, 1-2 parts of stearic acid, 1-2 parts of chlorinated paraffin wax, 1-3 parts of solid calcium-zinc stabilizing agent and 1-3 parts of phosphite. The modified composite cable sheath material has the advantages of favorable aging resistance, excellent physical and mechanical properties and lower cost.

Description

technical field [0001] The invention relates to the technical field of cable sheaths, in particular to a modified composite cable sheath material and a preparation method thereof. Background technique [0002] With the rapid development of China's cable industry, the number of new companies is increasing, and the overall technical level of the industry has been greatly improved. In the line, the proportion of cables is gradually increasing. The outermost layer of cables is generally rubber or rubber synthetic sleeves. This The role of the insulation layer is to protect the cable from damage. However, during laying or operation, the sheath layer of the cable can be damaged or mechanically damaged, and the long-term overload operation will easily cause the sheath layer of the cable to age and dry out. , so that the sheath layer loses or reduces the protective performance. The performance of the rubber material of the sheath layer is directly related to the added fillers and r...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of China's cable industry, the number of new companies is increasing, and the overall technical level of the industry has been greatly improved. In the line, the proportion of cables is gradually increasing. The outermost layer of cables is generally rubber or rubber synthetic sleeves. This The role of the insulation layer is to protect the cable from damage. However, during laying or operation, the sheath layer of the cable can be damaged or mechanically damaged, and the long-term overload operation will easily cause the sheath layer of the cable to age and dry out. , so that the sheath layer loses or reduces the protective performance

The performance of the rubber material of the sheath layer is directly related to the added fillers and reinforcing agents. Because of its rich raw materials, simple processing technology, and low cost, kaolin is one of the commonly used inorganic mineral fillers for rubber sheath layers. Kaolin is based on Clay minerals with kaolinite and halloysite as the main mineral components. Its structure is dioctahedral, which is composed of 1:1 silicon-oxygen tetrahedron and aluminum-oxygen octahedron. The silicon-oxygen tetrahedron and aluminum-oxygen octahedron share oxygen Atoms, but its particles are fine, large surface area, hydrophilic surface, high activity on the surface, easy to agglomerate, and because the interface properties of kaolin and polymer are different, the compatibility is poor, it is difficult to disperse evenly when filling the polymer itself The phase separation occurs, which reduces the mechanical and mechanical properties of the polymer to a certain extent, so that the excellent properties of this fine kaolin cannot be fully utilized. How to prepare a modified composite cable sheath with aging resistance, good mechanical properties, and low cost Materials become a technical problem that needs to be solved at present