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Improved composite electrical adhesive tape and processing method thereof

An electrical tape, pressure-sensitive adhesive technology, applied in the direction of film/sheet adhesive, adhesive, adhesive type, etc., can solve the problem of poor surface wetting ability of metal core material or plastic sheath substrate Meet the requirements of insulation and sealing, damage sealing performance and electrical insulation performance, etc., achieve excellent insulation and self-adhesion, eliminate hidden dangers of easy failure, and improve the effect of wetting ability

Active Publication Date: 2009-12-16
HEBEI YONGLE TAPE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it has been proved in practice that no matter which of the above-mentioned self-adhesive rubber insulation sealing tapes on the market can not meet the insulation sealing requirements under long-term water immersion or wet and harsh weather conditions, especially when wrapping complex-shaped wires by hand In the case of the cable connection connector
Analysis of the reasons is mainly due to the fact that the current self-adhesive rubber insulating and sealing base materials are not good enough for the metal core materials of wires and cables or for their plastic sheath substrates, resulting in long-term water immersion or long-term wet and severe weather conditions. Under normal circumstances, water or water vapor will gradually penetrate into the metal conductor from the bonding interface, thereby destroying its sealing performance and electrical insulation performance; and the reason why the bonding performance is not good enough is mainly because the current self-adhesive rubber insulating sealing adhesive tape base material The initial adhesion of the surface is poor, so that it has poor wetting ability to the surface of the metal core material or plastic skin substrate

Method used

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  • Improved composite electrical adhesive tape and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An improved processing technology of composite electrical tape:

[0031] ① mixing polyisobutylene and butyl rubber or isoprene rubber as the main raw material;

[0032] ② Calendering to make a 51mm×1.0mm×3m substrate-free base material, the thickness of the base material layer is 1.0mm;

[0033] ③Scrape or spray solvent-based rubber pressure-sensitive adhesive HX-902 directly on the above-mentioned base material. About 9.5h, the thickness of the pressure-sensitive adhesive layer is about 15μm after drying;

[0034] ④ Composite the above-mentioned base material coated with pressure-sensitive adhesive with release film or release paper and roll it into a disc-shaped product.

[0035] The prepared improved composite electrical tape was tested for its initial adhesion and water-resistant sealability, and the results are shown in Table 1 for the results of Comparative Test 1.

Embodiment 2

[0037] In this example, an improved composite electrical tape is prepared, and the preparation method is the same as in Example 1.

[0038] The difference is that a layer of solvent-based acrylate pressure-sensitive adhesive is coated on the surface of the base material calendered with polyisobutylene and butyl rubber or isoprene rubber as the main material. The measured solvent-based acrylate The properties of the pressure-sensitive adhesive are: initial tack of 16, 180°peel strength of 7.0N / 25mm, stickiness of about 9.5h, and the thickness of the pressure-sensitive adhesive layer after drying is about 3μm.

[0039] The prepared improved composite electrical tape was tested for initial tack and water resistance, and the results were as follows:

[0040] 1) The initial viscosity is 11;

[0041]2) Water-resistant sealing effect: the rubber base material is easier to remove, and the surface of the protected copper rod has partially lost its original brightness.

[0042] The ab...

Embodiment 3

[0044] This example introduces another processing technology of the improved composite electrical tape.

[0045] ① Mixing the rubber compound with polyisobutylene and butyl rubber or isoprene rubber as the main raw material;

[0046] ② Calender the above-mentioned mixed rubber material into a base material of 51mm×1.0mm×3m, and the thickness of the base material layer is 1.0mm.

[0047] ③Scratch the hot-melt acrylic pressure-sensitive adhesive glue solution on the release film or release paper. The measured initial tack of the hot-melt acrylic pressure-sensitive adhesive is 16, and the 180° peel strength is 7.1N / 25mm. About 9.0h, the thickness of the pressure-sensitive adhesive layer after drying is about 5μm;

[0048] ④Compound the release film or release paper with the base material coated with pressure-sensitive adhesive, and transfer the pressure-sensitive adhesive on the release film or release paper to the base material.

[0049] The prepared improved composite electri...

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Abstract

The invention discloses improved composite electrical adhesive tape, which comprises a base material formed by calendaring rubber gelatine. A key improvement is to coat the surface of the base material with a layer of pressure-sensitive adhesive having diffusion-fusion performances. A processing method for the improved composite electrical adhesive tape is direct blade coating or transfer coating. As the initial viscosity and water resistance of the adhesive tape are remarkably improved by adopting the processing method, the problem that the prior self-adhesive insulating sealing tape which is wet or soaked in water is easy to lose effectiveness is solved so as to provide a strong guarantee for the insulation seal protection of high-voltage wires and cables.

Description

technical field [0001] The invention relates to an adhesive tape and a manufacturing method thereof, which are suitable for protective encapsulation of exposed conductors in electrical work, especially for occasions where long-term insulation performance is maintained by means of self-adhesiveness. Background technique [0002] During the manufacture, construction and use of electrical equipment, various terminals and connection joints of a large number of wires and cables need to be insulated and sealed with electrical insulating sealing tape for possible leakage. There are mainly three types commonly used at present: the first is black cloth-based insulating tape, commonly known as electrical black tape, which is used to wrap wire joints with a voltage not exceeding 380 volts; the second is polyvinyl chloride insulating tape, namely PVC tape, Commonly known as plastic tape, it is mainly used for indoor and outdoor wire joints and automotive wiring wrapping and insulation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/04C09J121/00
Inventor 王凤曾宪家金春明杨玉昆
Owner HEBEI YONGLE TAPE CO LTD
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