Graphene base material semiconductive buffering water blocking tape, and manufacturing method thereof

Abstract

The invention relates to a graphene base material semiconductive buffering water blocking tape. The graphene base material semiconductive buffering water blocking tape is capable of avoiding defects in the prior art, comprises a fluffy cotton base material, and a non-woven fabric base material; the fluffy cotton base material is fluffy cotton prepared through drying of an immersion coated semiconductive adhesive; the non-woven fabric base material is non-woven fabric prepared through drying of the immersion coated semiconductive adhesive; the surface of the fluffy cotton base material is coated with a semiconductive adhesive layer; the surface of the non-woven fabric base material is coated with a graphene water-proof powder layer; and the fluffy cotton base material and the non-woven fabric base material are bonded together.

Description

technical field [0001] The invention belongs to the field of cable production, and relates to a graphene-based semiconductive buffer water-blocking tape used for a buffer layer of an ultra-high voltage cable and a production method thereof. Background technique [0002] For high-voltage and ultra-high-voltage cross-linked cables with a metal sheath structure, a buffer layer needs to be added between the metal sheath and the insulated core. The function of the buffer layer is to offset the thermal expansion of the insulation during cable operation and protect the insulated core from damage. The buffer layer material usually adopts semi-conductive buffer water-blocking tape to ensure good electrical connection between the insulating shield and the metal sleeve to avoid capacitive discharge. The semi-conductive buffer water-blocking tape expands with water to form a dense colloid, and the cable has a water-blocking function. [0003] There are two defects and deficiencies in th...

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Problems solved by technology

[0003] There are two defects and deficiencies in the existing technology: 1. The traditional semi-conductive buffer water-blocking belt is composed of fluffy cotton + non-woven fabric base belt, and the middle is coated with water-blocking powder. The fluffy cotton and non-woven fabric need to be bonded in the bonding process Coating carbon black as a conductive material has a large volume resistivity, and discharge often occurs between the insulating shielding layer and the metal sleeve; 2. The water-blocking powder of the semi-conductive buffer water-blocking tape is coated between the fluffy cotton and the base cloth to form An insulating layer is formed, which seriously affects the conductivity of the semi-conductive buffer water-blocking tape

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