A temperature-memory color-changing insulating material and insulating sleeve

Abstract

The invention discloses a temperature-memory color-changing insulating material and an insulating sleeve, which comprise the following components by mass: 25-50 parts of EPDM rubber, 20-40 parts of polyolefin elastomer, and dioctyl phthalate 5-20 parts of ester, 15-30 parts of aluminum hydroxide, 1-5 parts of antioxidant, 20-40 parts of flame retardant, 1-5 parts of light stabilizer, 5-40 parts of colorant. And the casing is prepared according to the following method: after mixing all the components together, use a twin-screw extruder to plasticize, melt, and extrude the pellets, and the extrusion temperature is 180 ° C; use a single-screw extruder to extrude the obtained pellets Produced into a round tube, the temperature is controlled at 140-170°C; the obtained round tube is subjected to irradiation processing, and then heated and expanded, and the temperature is controlled at 130-150°C. The insulating material and the casing can change color when the temperature reaches 70°C, and the color returns to normal when the temperature is lower than 70°C.

Description

technical field [0001] The invention relates to the technical field of high-temperature insulating materials, in particular to a temperature-memory color-changing insulating material and an insulating sleeve. Background technique [0002] In the field of electric power construction and equipment, components such as bus bars, cables, cable accessories, and reinforced aluminum stranded wires need to be covered with insulating sleeves made of insulating materials to avoid chemical corrosion and prevent maintenance personnel from entering the charged gap by mistake and causing personal injury and other adverse factors. However, the temperature of these components will increase with the running time of the power system. When the temperature is too high, it will cause internal circuit failures, and even burn and explode in severe cases, seriously affecting the normal and safe operation of the power system. [0003] In order to prevent adverse effects caused by overheating of comp...

AI Technical Summary

Problems solved by technology

Although the thermochromic luminescent protective layer can change color with the temperature change to visually observe the temperature change of the cable, it does not have the functions of insulation and shielding, and still needs the outer sheath, inner sheath, and insulating shielding layer of the inner layer. and other structures to achieve the insulation effect, the structure is complex, which increases the cost of production and implementation

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