Highly flame-retardant waterproof wire and preparation method

Abstract

The invention discloses a high flame-retardant waterproof wire and a preparation method thereof, belonging to the technical field of wires and cables. The high flame-retardant waterproof wire includes a wire body, an electrostatic shielding layer, and a flame-retardant protective layer from the inside to the outside. The electrostatic shielding layer is a polyethylene terephthalate/graphene nanocomposite material layer. The flame-retardant protective layer is a graphene-modified polyurethane coating, and the wire body is a highly flame-retardant polyolefin wire. The preparation method includes: (1) preparing highly flame-retardant polyolefin wires; (2) coating polyethylene terephthalate/graphene nanocomposite on the surface after cooling the prepared highly flame-retardant polyolefin wires The material is dried; (3) the surface of the wire in step (2) is coated with a graphene-modified polyurethane coating, and dried. The electric wire of the present invention has good flame-retardant effect and excellent waterproof performance, and improves the use safety of the electric wire. The preparation method has simple process, mild conditions and good application prospect.

Description

technical field [0001] The invention relates to the technical field of electric wires and cables, in particular to a high flame-retardant and waterproof electric wire and a preparation method thereof. Background technique [0002] Traditional cables such as power cables, control cables, etc. are mostly made of polyvinyl chloride, polyolefin and other materials, which have poor flame retardancy. They will age rapidly in high temperature situations until the cables are scrapped. In addition, the sheath and insulating materials will quickly burn out in case of fire. Combustion can cause power outages, property damage and personal safety threats. [0003] Wire and cable is a wire product used to transmit electrical energy, information and realize electromagnetic energy conversion. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. The quality of wire and cable directly affects the qual...

AI Technical Summary

Problems solved by technology

General-purpose wires and cables generally include wires, inner sheath, armor layer and outer sheath from the inside to the outside. Ordinary wires and cables have no armor layer. General wires and cables without armor layers often appear worn out, Leakage and leakage faults cause the conductors of the wires and cables to be very new, while the sheaths age ahead of time, which directly affects the service life and personal safety of the wires and cables, resulting in waste of resources

Fire-resistant wires and cables using traditional materials can only guarantee their normal power supply for a certain period of time under flame conditions, and cannot operate normally under the condition of being subjected to water showers and impacts.

The reason is that under flame conditions, the high temperature resistant adhesive has lost its cohesiveness, the glass fiber cloth has lost its mechanical strength, and the bonding force between the mica scales has been quite loose. The insulation resistance of the structural refractory layer drops sharply, and the insulation resistance between the lines cannot be maintained, resulting in a short circuit

When there is a mechanical impact, the mica tape structure, which has been burned quite loosely, becomes more loose and falls off, and cannot maintain its insulation

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