Method for preparing high-hardness heat-resisting cable sheath material

Abstract

The invention discloses a method for preparing a high-hardness heat-resisting cable sheath material. The method comprises the following steps: turning on an internal mixer and preheating to 55-60 DEG C; mixing chloroprene rubber in the internal mixer for 1-2 minutes; when the temperature ascends to 75-80 DEG C, feeding linear low-density PE resin and mixing to obtain a main ingredient, wherein the mixing time is 3-4 minutes; adding a plasticizer, activated kaoline, a calcium-zinc composite heat stabilizer, MBS resin and a vulcanization accelerator zinc oxide, evenly mixing, and then adding antimonous oxide, magnesium hydrate and white carbon black, and mixing; adding tetrasulfide double-pentamethylene thiuram and N,N'-meta phenylene bis maleimide, mixing for 40-55 seconds, and thining in an open mill for 3-4 times;, when the temperature of the material is 101-103 DEG C steadily, extruding in a screw extruder, so as to obtain the high-hardness heat-resisting cable sheath material. The high-hardness heat-resisting cable sheath material is high in hardness, heat-resistant, and long in service life.

Description

Technical field [0001] The invention relates to the technical field of sheath materials for cables, in particular to a method for preparing high-hardness and heat-resistant cable sheath materials. Background technique [0002] With the rapid economic development, wires and cables have been widely used in various industries and fields. With the frequent occurrence of electrical fire accidents, the flame retardant problem of wires and cables has gradually attracted the attention of countries all over the world; a large amount of smoke is released when the cable is burned Poisonous and corrosive gases are dangerous factors in fires, which hinder people’s safe evacuation and fire fighting, and cause serious losses to lives and properties. At the same time, with the development of communications, automobile industry and computer industry, especially It is used in many occasions such as aviation wire, automobile wire, high temperature instrument cable, oil drilling platform cable, etc....

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Problems solved by technology

[0002] With the rapid development of the economy, wires and cables have been widely used in various industries and fields. With the frequent occurrence of electrical fire accidents, the flame retardant problem of wires and cables has gradually attracted the attention of all countries in the world; when the cable burns, a large amount of smoke is released. And toxic and corrosive gases are dangerous factors in fires, which hinder people's safe evacuation and fire fighting work, causing serious losses of life and property. At the same time, with the development of communications, automobile industry and computer industry, especially It is used in many occasions such as aviation wires, automotive wires, high-temperature instrument cables, oil drilling platform cables, etc., and because there are a large number of mice in the wild or in human settlements, the outer layer of the cable has the characteristic material that causes mice to bite it. It has a strong destructive force, causing the protective layer of the cable to be destroyed, and the internal wires cannot be protected. With the extension of the service life, the cable is damaged and becomes invalid so that it cannot be used, thus affecting the service life of the product

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