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Semi-conductive buffering tape for sea cables

A semi-conductive, buffer tape technology, used in power cables, cables, circuits with shielding/conducting layers, etc., can solve the problem that the tape cannot meet its requirements, etc., and achieve low product resistance, weakening electric field strength, and increasing firmness. degree of effect

Inactive Publication Date: 2017-02-15
沈阳东铄电材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because submarine cables have strict requirements on resistance and other indicators, general strips cannot meet their requirements.

Method used

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  • Semi-conductive buffering tape for sea cables
  • Semi-conductive buffering tape for sea cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The hot-rolled cloth and fluffy needle-punched cotton are impregnated with semi-conductive glue through production equipment. The surface resistance of the obtained semi-conductive hot-rolled cloth is 860Ω, and the surface resistance of the semi-conductive fluffy needle-punched cotton is 500Ω. One side of the cloth and the semi-conductive fluffy needle-punched cotton is sprayed with adhesive, and the adhesive powder is sprayed on the adhesive of the semi-conductive hot-rolled cloth, and then the two semi-conductive non-woven fabrics are compounded, extruded and dried to obtain the Conductive buffer tape.

[0046] The thickness of the prepared semi-conductive buffer tape is 2.1mm, and the weight per unit area is 270g / m 2 , surface resistance 350Ω, volume resistivity 3.1×10 3 Ω·cm.

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Abstract

The invention discloses a semi-conductive buffering tape for sea cables, which comprises a semi-conductive non-woven fabric I (1) and a semi-conductive non-woven fabric II (2). Between the two non-woven fabrics, adhesives are coated to form an adhesive layer (3) so that the two semi-conductive non-woven fabrics are compounded together. According to the invention, the semi-conductive buffering tape does not contain water absorbing resin materials, which solves the excessive performance of water absorbing resin to absorb more water beyond its capacity in the sea and at the same time reduces the production cost. The removal of the water absorbing resin further reduces the electrical resistance across the semi-conductive buffering tape and can effectively buffer and weaken the intensity of an electric field and meets the requirements of a sea cable on the semi-conductive buffering tape.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a semi-conductive buffer belt for submarine cables. Background technique [0002] Semi-conductive buffer water-blocking tape series products are often used in the semi-conductive shielding water-blocking layer of medium and high voltage and ultra-high voltage cables. For example, Chinese patent CN102122544B discloses a 110KV co-core high-voltage test power submarine cable, and the buffer layer material is a semi-conductive buffer water-blocking tape. The semi-conductive buffer water-blocking tape is composed of two non-woven materials, and a water-absorbing resin with a certain water-absorbing strength is between the two non-woven fabrics. Since the water-absorbent resin is obtained by the polymerization of organic molecules, the water absorption rate is greatly affected by the number of ions in the water, so deionized water or distilled water is generally used to test the water-abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/02H01B9/02D06M17/06
CPCH01B5/02D06M17/06H01B9/021H01B9/027
Inventor 李鑫鑫王巍
Owner 沈阳东铄电材有限公司
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