Water-blocking tape of power cable and preparation method of water-blocking tape

Abstract

The invention discloses a water-blocking tape of a power cable and a preparation method thereof, the water-blocking tape comprises two layers of adsorption resin and water-blocking powder clamped between the two layers of adsorption resin, the water-blocking powder absorbs and adsorbs water permeated by the power cable due to damp, and the two layers of adsorption resin absorb the water-blocking powder which swells after absorbing water. The water-blocking tape prevents water from going deep into the water-blocking tape due to water absorption expansion, not only can guarantee excellent water absorption performance of the water-blocking tape, but also can prevent the water-blocking powder from being affected with damp, expanded and separated out to the surface of the water-blocking tape to react with aluminum for a long time to corrode, prevents the expanded water-blocking powder from permeating into the power cable, and improves the safety performance of the power cable.

Description

[0001] include: [0002] The side of the semi-conductive non-woven fabric coated with the absorbent resin is immersed in the tank with the pre-prepared water-blocking powder in parallel, and the semi-conductive non-woven fabric is pulled at a constant speed by a belt-releasing device, so that the water-blocking powder is evenly dispersed on the semi-conductive non-woven fabric. superior. [0003] Water-blocking tape for power cables and preparation method thereof technical field [0004] The invention relates to the technical field of cables, in particular to a water blocking tape of a power cable and a preparation method thereof. Background technique [0005] With the continuous development of economy and society, power cables are widely used in urban network reconstruction because of their advantages of beautifying the city, low failure rate, and small corridors. Power cables are usually laid underground and are easily damaged by external forces such as municipal enginee...

AI Technical Summary

Problems solved by technology

[0006] After the water-blocking tape made by the existing technology is damp, the water-blocking powder expands and contacts the aluminum sheath through the holes of the fluffy cotton. After the two contact, the moisture absorbed inside the water-blocking powder will chemically corrode the aluminum sheath under long-term action White powder is generated and distributed on the surface of the water-blocking tape with good electrical conductivity, causing field strength distortion, causing partial discharge of the water-blocking tape, and long-term discharge ablation causing cable insulation failure

Images