High-strength flame-retardant insulated geothermal heating cable

Abstract

The invention discloses a high-strength flame-retardant insulated geothermal heating cable, which comprises a hot wire, a cold wire, a wrapping layer, a general insulated layer, grounding wires, a shielding layer, and a sheath layer, wherein the hot wire and the cold wire are coated by the wrapping layer; the general insulated layer coats the wrapping layer; the shielding layer coats the general insulated layer; the sheath layer coats the shielding layer; the grounding wires are arranged between the shielding layer and the general insulated layer; the general insulated layer is low-smoke halogen-free flame-retardant thermoplastic polyolefin; a first component and a second component are mixed and extruded at a mass ratio of three to seven to form the low-smoke halogen-free flame-retardant thermoplastic polyolefin; the first component is a thermoplastic elastomer with ethylene and octane of a metallocene catalyst for realizing in-situ polymerization; and the second component is an ethylene-vinylacetate copolymer. Thus, the temperature-resistance flame-retardant performance is good, the actual use requirements can be met, and the safety is high.

Description

technical field [0001] The invention relates to the technical field of heating cable products, in particular to a high-strength flame-retardant insulating geothermal heating cable. Background technique [0002] Heating cable is a product that is made into a cable structure, uses electricity as the energy source, and uses alloy resistance wires to conduct electricity and generate heat to achieve heating or heat preservation effects. After the heating cable is energized, it runs at a temperature of 40-60 degrees Celsius, and transmits heat energy to the heated body through heat conduction or heat convection and the emitted far-infrared radiation of 8-13 microns. Installing the heating cable in the indoor floor can obtain a good indoor heating effect. Self-limiting heating cables have become the most common type of heating cables in the world today. They can be widely used in the transportation of liquid objects in pipelines and antifreeze insulation of tanks, maintaining proc...

AI Technical Summary

Problems solved by technology

[0003] The self-limiting temperature of conventional PTC polymer materials in the prior art is usually about 90 degrees Celsius, which is too high for a household environment; the main problem with conventional heating cables is that temperature control mainly depends on external temperature sensors And thermostat, when the external temperature sensor and thermostat break down, it is easy to cause the temperature of the cable to be too high, so the geothermal heating cable has higher safety requirements for temperature resistance and flame retardancy

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