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Electric insulating film and preparing method thereof

A technology of electrical insulation and insulating film, applied in the direction of organic insulators, plastic/resin/wax insulators, coatings, etc., can solve the problems that insulating materials cannot meet the requirements of use, achieve good mechanical properties, be easy to implement, and improve application performance Effect

Inactive Publication Date: 2014-02-19
KUNSHAN FENFA INSULATING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, with the advancement of technology, the voltage level has been continuously improved, and the above insulation materials and insulation methods cannot meet the requirements of use.

Method used

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  • Electric insulating film and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] The formula composition of the insulating glue in parts by weight is: 5 parts of silicone adhesive, 95 parts of liquid epoxy resin, 20 parts of phenalkamine curing agent T31, 8 parts of dibutyl phthalate, and 30 parts of acetone.

[0022] Preparation steps of electrical insulation film:

[0023] (1) Add 5g of silicone adhesive and an appropriate amount of acetone according to the formula into a container with a heating and stirring device, and stir for 1 hour at a constant temperature of 60°C and 200 rpm to completely dissolve the silicone adhesive in acetone;

[0024] (2) Add 95g of liquid epoxy resin, 8g of dibutyl phthalate and 20g of phenalkamine curing agent T31 to the silicone adhesive dissolved in step (1) according to the recipe. Continue to stir at the stirring speed for 1 hour to obtain an insulating glue solution;

[0025] (3) Add an appropriate amount of acetone to the insulating glue solution obtained in step (2) under stirring, adjust the viscosity of the...

Embodiment 2

[0030] The formula composition of the insulating adhesive is: silicone adhesive 8, liquid epoxy resin 92, phenalkamine curing agent T31 30, dibutyl phthalate 10, acetone 50.

[0031] Preparation steps of electrical insulation film:

[0032] (1) Add 8g of silicone adhesive and an appropriate amount of acetone according to the formula into a container with a heating and stirring device, and stir for 1 hour at a constant temperature of 60°C and 200 rpm to completely dissolve the silicone adhesive in acetone;

[0033] (2) According to the recipe, add 92g of liquid epoxy resin, 10g of dibutyl phthalate and 30g of phenalkamine curing agent T31 to the silicone adhesive dissolved in step (1). Continue to stir at the stirring speed for 1 hour to obtain an insulating glue solution;

[0034] (3) Add an appropriate amount of acetone to the insulating glue solution obtained in step (2) under stirring, adjust the viscosity of the insulating glue solution to 25s, and then perform vacuum deg...

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Abstract

The invention discloses an electric insulating film and a preparing method thereof. The electric insulating film comprises an insulating matrix film and insulation paste, wherein the insulation paste is uniformly applied to the insulating matrix film in a triangular shape, and is cured at the room temperature for 24 hours, wherein the coating thickness is 0.025mm; the insulating matrix film thickness is 0.045mm thick; the performances of the electric insulating film are as follows: the tensile strength is 65-72MPa, the elongation at break is 46-60%, the hot-shrinkage rate is 0.8-1.2%, the electric strength is 158-168kV / mm, the dielectric constant is 1.73-1.8, and the apparent decomposition temperature is 400-425 DEG C. The preparation method is simple and convenient, and is easy to realize, and the prepared electric insulating film has an excellent mechanical property, an excellent insulating property and high temperature resistance; the insulation paste is applied to the insulating matrix film in a fixed shape, so that a regular channel can be formed, the discharge and the cooling of air among the insulating films are facilitated, and more importantly, the adding of insulating gas or insulating liquid for supplementary insulation is benefited, so that the application performance of the electric insulating film can be further improved.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to an electrical insulating film and a preparation method thereof. Background technique [0002] Electrical equipment such as transformers, dry-type transformers, capacitors, and electrical instruments are usually used under high voltage conditions. Depending on the voltage they are in, different insulating materials are required. Air, oiled paper and SF 6 Insulating gas is a commonly used insulating material for the above-mentioned electrical equipment. However, in recent years, with the advancement of technology, the voltage level has been continuously increased, and the above insulation materials and insulation methods cannot meet the requirements of use. Therefore, it is an inevitable trend to develop insulating materials with higher insulating properties. Contents of the invention [0003] The technical problem mainly solved by the present invention is to prov...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08L23/12C08L79/08C09D163/00C09D183/04H01B3/44H01B3/30
Inventor 周巧芬
Owner KUNSHAN FENFA INSULATING MATERIALS