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Heat-shrinkable composite insulating tape

A composite insulation and heat shrinking technology, applied in the direction of film/sheet adhesives, adhesives, etc., can solve the problems of safety effects of cable safety pipes, decreased insulation and sealing properties, and decreased bonding strength, and achieves tensile strength. The effect of ideal tensile strength, improved breakdown strength and high retention rate

Active Publication Date: 2015-02-18
江苏达胜热缩防护用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing heat-shrinkable composite insulating tape has different tensile strength, breakdown strength, longitudinal shrinkage, heat resistance, and adhesiveness of the composite insulating tape itself due to problems such as production technology, so that the insulating tape is affected by temperature after use. , humidity and other environmental influences, the bonding strength will decrease, resulting in cracking of the insulating tape, reducing the insulation and sealing performance, which will have a great impact on the safety of cables or pipelines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Material preparation: Weigh the materials according to the corresponding components in Table 1, and set aside;

[0027] (2) Preparation of cross-linked polyolefin materials: Put all the materials prepared in step (1) except hot melt adhesive into a high-speed mixer, mix the materials evenly, and then extrude pellets with a twin-screw extruder material, and then the pellets are processed and shaped to obtain a cross-linked polyolefin material.

[0028] (3) Composite processing: The cross-linked polyolefin material prepared in step (2) and the hot melt adhesive are pressed together at a temperature of 80-120°C, and then cooled to obtain a heat-shrinkable composite material .

[0029] (4) Processing and molding: cutting the heat-shrinkable composite material in step (3) to obtain a heat-shrinkable composite insulating tape.

Embodiment 2-10

[0031] Each component was weighed according to the corresponding ratio in Table 1, and the rest of the steps were the same as in Example 1.

[0032] Table 1 Formulation Component Table Unit (%)

[0033]

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Abstract

The invention provides a heat-shrinkable composite insulating tape which comprises a crosslinking polyolefin material and a hot-melt adhesive. The formula comprises the following components in parts by mass: 30-70 parts of polyolefin resin, 9-15 parts of silane, 1-2 parts of crosslinking agent, 0-0.7 part of crosslinking assistant, 0-2 parts of antioxidant, 0-0.3 part of lubricant and 15-50 parts of hot-melt adhesive, wherein the polyolefin resin is one or a mixture of ethylene-vinyl acetate resin, ethylene-vinyl acrylate resin and ethylene-acrylate-ethylene resin; and the hot-melt adhesive is one or a mixture of an ethylene-vinyl acetate hot-melt adhesive and a polyamide hot-melt adhesive. The heat-shrinkable composite insulating tape provided by the invention has favorable performance in the aspects of extension / shrinkage, oil resistance, cold resistance, crack resistance, breakdown strength and the like; and the insulating tape has long service life.

Description

technical field [0001] The invention relates to heat-shrinkable materials, in particular to a heat-shrinkable composite insulating tape. Background technique [0002] Because of its softness, environmental protection, insulation, waterproof, anti-corrosion and other functions, the heat-shrinkable composite insulating tape is widely used in the local repair of the cable outer sheath when it is mechanically damaged, and the waterproof sealing treatment of the port of the heat-shrinkable cable intermediate joint sheath. Pipeline anticorrosion and sealing, and other places that require insulation and sealing. The existing heat-shrinkable composite insulating tape has different tensile strength, breakdown strength, longitudinal shrinkage, heat resistance, and adhesiveness of the composite insulating tape itself due to problems such as production technology, so that the insulating tape is affected by temperature after use. , Humidity and other environmental influences, the bondin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J123/08C09J177/00C08L23/08C08K5/00C08K5/5425C08K5/14C08K5/17
Inventor 庄向阳梅锦伟
Owner 江苏达胜热缩防护用品有限公司
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