Polymer-based conductive composite material and method for preparing heat tracing tape cable from same

Abstract

The invention discloses a polymer-based conductive composite material and a method for preparing a heat tracing tape cable from the polymer-based conductive composite material and belongs to the fieldof cable preparation. The material comprises the following raw materials by weight: 50-70 parts of linear low density polyethylene, 30-40 parts of an ethylene-vinyl acetate copolymer, 15-25 parts ofoil furnace carbon black, 10-20 parts of dicumyl peroxide, 8-12 parts of a conductive filler, and 5-10 parts of an auxiliary agent. The heat tracing cable is simple in preparation process and worthy of popularization; the ternary composite material is constructed by adopting linear low-density polyethylene, an ethylene-vinyl acetate copolymer and oil furnace carbon black as basic components; the ternary composite material is endowed with electrical conductivity and high PTC strength through the oil furnace carbon black, dicumyl peroxide can be prevented from thermal decomposition through the antioxidant in the auxiliary agent, and the comprehensive performance of the heat tracing cable can be further improved through the flame retardant, the stabilizer and the dispersing agent in the auxiliary agent.

Description

technical field [0001] The invention relates to the technical field of cable preparation, in particular to a polymer-based conductive composite material and a method for preparing a heating cable. Background technique [0002] Heating cables are widely used in many fields. For example, in industry, they are mainly used in petroleum, chemical, thermal power plants and other places where it is necessary to prevent the liquid substances in pipelines or tanks from solidifying / flowing slowly. In public facilities, they are mainly used as companions for fire-fighting pipelines. It can be used for indoor heating and anti-freezing of outdoor pipes in winter in civil applications. [0003] The core of the heating cable lies in its structure and the conductive polymer composite material (PCT material) that makes its electric heating element. The conductive polymer composite material refers to a heat-sensitive material whose resistance value increases with the increase of temperature, ...

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Problems solved by technology

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a polymer-based conductive composite material and a method for preparing a heating cable, which has the advantages of good stability, not easy to age, and sufficient PCT strength, and solves the existing problems. In the technology, polymer-based conductive composite materials and polymer heating cables still have defects such as poor stability, easy aging, and insufficient PCT strength.