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Heat-shrinkable wrapping tape

A wrapping tape and heat-shrinking technology, applied in the direction of damage protection, coating, pipe components, etc., can solve problems such as poor adhesion, damage to the anti-corrosion layer, and reduced service life

Inactive Publication Date: 2015-01-07
JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after a period of use, the anti-corrosion layer of the pipeline will be damaged. In addition, the bending part of the pipeline is not suitable for the form of a sleeve, so in many occasions it is necessary to use a tape-shaped material for winding. Poor, and poor adhesion between layers, reducing the service life

Method used

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  • Heat-shrinkable wrapping tape

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Embodiment Construction

[0010] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0011] Such as figure 1 As shown, the heat-shrinkable winding tape of the present invention has a layered structure, the first layer is a polyethylene base material layer 1, and a hot melt adhesive layer 2 and a solid epoxy coating layer 3 are sequentially arranged on the polyethylene base material layer 1. The polyethylene substrate layer 1 is high-density polyethylene that has undergone crosslinking and radiation. The polyethylene base material layer 1 is coated on the three-layer polyethylene pipe. The hot melt adhesive layer 2 has airtightness.

[0012] During the construction of the present invention, firstly, the pipeline is preheated, and the treated pipeline is wrapped by machine or manually to ensure that the lap joint width is not less than 25 mm, and the strip is evenly heated, and the strip shrinks evenly in the radial direction, and at th...

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Abstract

A heat-shrinkable wrapping tape relates to the technical field of a heat-shrinkable anti-corrosion material designed for anti-corrosion mending of the welded junctions of buried or aerial steel pipelines. The heat-shrinkable wrapping tape adopts a layered structure, wherein the first layer is a polyethylene substrate layer; a hot melt adhesive layer and a solid epoxy coating are arranged on the polyethylene substrate layer in sequence; the polyethylene substrate layer is made of high density polyethylene subjected to cross-linked radiation; the polyethylene substrate layer is applied onto polyethylene pipelines; and the hot melt adhesive layer has airtightness. The invention aims to provide the heat-shrinkable wrapping tape with the advantages of water resistance, acid resistance, alkali resistance, corrosion resistance, simple structure and low manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of a heat-shrinkable anti-corrosion tape designed for anti-corrosion repair of welding joints of buried or overhead steel pipelines. Background technique [0002] The welding joints of buried or overhead steel pipelines currently used need anti-corrosion treatment, but due to the thermal expansion and contraction of steel pipelines, the heat shrinkable tape used as a filling material is required to be able to adapt to its expansion coefficient, no matter It can be completely attached to the outer wall of the steel pipe in any environment. However, after a period of use, the anti-corrosion layer of the pipeline will be damaged. In addition, the bending part of the pipeline is not suitable for the form of a sleeve, so in many occasions it is necessary to use a tape-shaped material for winding. Poor performance, and poor adhesion between layers, reducing the service life. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L58/00F16L55/168
CPCF16L58/10F16L55/1686F16L58/16
Inventor 邢东剑叶启捷
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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