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Three-layer co-extrusion outer shielding peelable material for rubber sleeve cable and preparation method of three-layer co-extrusion outer shielding peelable material

A technology of three-layer co-extrusion and stripping materials, which is used in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, chemical instruments and methods, etc. The problem of lack of tensile properties and anti-oxidation properties can achieve the effect of prolonging the service life and improving the anti-oxidation properties and tensile properties.

Pending Publication Date: 2022-06-28
浙江元通线缆制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The semi-conductive outer shielding material obtains excellent mechanical properties, peeling properties, flame retardant properties, electrical conductivity and temperature stability through the coordination of various components and the most appropriate content ratio; but rubber sheathed cables are often used outdoors, Pulling is also often required during use. In order to prolong the service life of the rubber sheathed cable, the outer shielding layer material of the rubber sheathed cable must also have strong tensile properties and oxidation resistance. The current rubber sheathed cable outer shielding The tensile properties and oxidation resistance of the layer material are still relatively lacking, and the outer shielding layer often begins to crack after a period of use, which affects the service life of the cable

Method used

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  • Three-layer co-extrusion outer shielding peelable material for rubber sleeve cable and preparation method of three-layer co-extrusion outer shielding peelable material

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Experimental program
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Effect test

Embodiment 1

[0028] In this embodiment, the preparation method of the conductive carbon black modified by aromatic hydrocarbon radicals is specifically: heating 10 kg of conductive carbon black to 120° C. in an oxygen-free environment, and then adding 2.5 kg of aromatic carbon black to the heated conductive carbon black Hydrocarbon radicals are then reacted in a closed manner for 40 minutes to obtain conductive carbon black modified by aromatic hydrocarbon radicals.

Embodiment 2

[0030] The present embodiment carries out the preparation method of the three-layer co-extruded outer shielding strippable material of the rubber sheathed cable, adopts each raw material of Example 2 in Table 1, and includes the following steps:

[0031] S1. Disperse the conductive carbon black modified by aromatic hydrocarbon radicals in an ethanol solution, then add trichloroacetyl isocyanate, react under the action of ultrasonic vibration for 1 hour, then add molybdenum hexacarbonyl, and then react under the action of ultrasonic vibration for 1 hour to obtain the first reaction solution;

[0032] S2, add vinyl chloride monomer in the first reaction solution again, pass electric current into the first reaction solution, specifically: when passing electric current in the first reaction solution, insert a cathode plate and a piece of cathode plate into the first reaction solution Anode plate, the voltage connected between the cathode plate and the anode plate is 24V, the dista...

Embodiment 3

[0038] The present embodiment carries out the preparation method of the three-layer co-extruded outer shielding strippable material of the rubber sheathed cable, adopts each raw material of Example 3 in Table 1, and includes the following steps:

[0039] S1. Disperse the conductive carbon black modified by aromatic hydrocarbon radicals in ethanol solution, then add trichloroacetyl isocyanate, react under the action of ultrasonic vibration for 1.5h, then add molybdenum hexacarbonyl, and then react under the action of ultrasonic vibration for 1.5h , obtain the first reaction solution;

[0040] S2, add vinyl chloride monomer in the first reaction solution, pass electric current into the first reaction solution, specifically: when electric current is passed into the first reaction solution, insert a cathode plate and a cathode plate into the first reaction solution Anode plate, the voltage connected between the cathode plate and the anode plate is 30V, the distance between the cat...

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Abstract

The invention relates to the technical field of cable manufacturing materials, and discloses a rubber sleeve cable three-layer co-extrusion outer shielding peelable material and a preparation method thereof.The preparation method comprises the steps that aromatic hydrocarbon free radical modified conductive carbon black is dispersed in an ethanol solution, trichloroacetyl isocyanate is added, ultrasonic oscillation reaction is carried out, molybdenum hexacarbonyl is added, and ultrasonic oscillation reaction is carried out; adding a vinyl chloride monomer, introducing current, stirring at a low speed, heating, and irradiating with gamma rays to obtain a second reaction solution; heating and melting polyvinyl chloride, adding the second reaction liquid and graphite powder into the molten polyvinyl chloride in a stirring state, and stirring at a high speed to obtain a third reaction liquid; adding a stripping agent, a reinforcing agent, an anti-aging agent, a plasticizer and a dispersing agent, stirring, adding an antioxidant, and mixing in an open mill to obtain a mixed material; and aging the mixed material after mixing for 12-24 hours to obtain the external shielding peelable material after aging. The rubber sleeve cable has better oxidation resistance and tensile property, and the service life of the rubber sleeve cable is prolonged.

Description

technical field [0001] The invention relates to the technical field of cable manufacturing materials, in particular to a three-layer co-extruded outer shielding strippable material for a rubber sheathed cable and a preparation method thereof. Background technique [0002] The rubber sheathed cable is a kind of soft and movable cable with multi-strand copper wire as the conductor and covered with rubber insulation and rubber sheath. In the high-voltage DC electric field of this kind of cable, due to the existence of fine unevenness, it is easy to cause partial discharge in the gap between the insulating layer and the conductor and between the insulating layer and the outer shielding layer. The electric field distribution of the insulating layer is uniform, reducing the electrical stress of the insulating layer, thereby preventing corona discharge, and it is usually necessary to set a semiconducting outer shielding material on its outer surface. [0003] The existing semi-con...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L51/10B32B27/30B32B27/06H01B1/24H01B13/00
CPCC08L27/06B32B27/304B32B27/08H01B1/24H01B13/00C08L2201/08C08L2203/202B32B2250/24B32B2307/552B32B2307/714C08L51/10
Inventor 张燕陈婉芳陈青松
Owner 浙江元通线缆制造有限公司
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