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Insulating paper for transformer

A technology of insulating paper and transformers, applied in the direction of transformers/inductor coils/windings/connections, chemical instruments and methods, layered products, etc., can solve the problems of poor physical, chemical, electrical performance and environmental adaptability, and achieve excellent physical Chemical properties, good electrical insulation properties, and the effect of improving bond strength

Inactive Publication Date: 2019-05-03
NANTONG RIZHI ELECTRIC STUFF CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of poor physical, chemical, electrical properties and environmental adaptability in the prior art, the present invention provides an insulating paper used for transformers

Method used

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  • Insulating paper for transformer
  • Insulating paper for transformer

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Effect test

Embodiment 1

[0027] Please see figure 1 , is a structural schematic diagram of a preferred embodiment of an insulating paper for a transformer according to the present invention. An insulating paper for a transformer includes a surface layer film 1, a first layer of insulating paper 2, an intermediate layer film 3 and The second layer of insulating paper4.

[0028] In this embodiment, the surface film 1 includes epoxy resin, rosin resin, polytetrafluoroethylene, polyvinyl butyral, asbestos and curing agent.

[0029] Further, in this embodiment, the parts by weight of the components of the surface layer film 1 are: 100 parts of epoxy resin, 50-70 parts of rosin resin, 36-50 parts of polytetrafluoroethylene, polyvinyl alcohol Butyraldehyde 16-20 parts, asbestos 16-24 parts, curing agent 20-30 parts.

[0030] Further, in this embodiment, due to the high viscosity and high oxidation resistance of rosin resin, the bonding strength between the surface layer film and the first layer of insulati...

Embodiment 2

[0042] The preparation method of the insulating paper used for the transformer is:

[0043]S1 dilutes the epoxy adhesive with a solvent;

[0044] S2 coating the diluted epoxy adhesive on the surface of the intermediate layer film 3;

[0045] S3 laminating the first layer of insulating paper 2 and the second layer of insulating paper 4 with the middle layer film 3 coated with the epoxy adhesive, and heating to remove the solvent;

[0046] S4 After fully diluting and mixing the components of the surface layer film 1 with a solvent and a dispersant, coating on the surface of the first layer of insulating paper 2 and heating and curing to form the surface layer film 1 .

[0047] In this embodiment, the solvent described in steps S1 and S3 is ethylene glycol ether.

[0048] In this embodiment, the parts by weight of the components of the surface film 1 in step S4 are: 100 parts of epoxy resin, 50-70 parts of rosin resin, 36-50 parts of polytetrafluoroethylene, polyvinyl alcohol ...

Embodiment 3

[0052] Please see figure 1 , is a structural schematic diagram of a preferred embodiment of an insulating paper for a transformer according to the present invention. An insulating paper for a transformer includes a surface layer film 1, a first layer of insulating paper 2, an intermediate layer film 3 and The second layer of insulating paper4.

[0053] In this embodiment, the surface film 1 includes epoxy resin, rosin resin, polytetrafluoroethylene, polyvinyl butyral, asbestos and curing agent.

[0054] Further, in this embodiment, the parts by weight of the components of the surface layer film 1 are: 100 parts of epoxy resin, 50 parts of rosin resin, 36 parts of polytetrafluoroethylene, 16 parts of polyvinyl butyral , 16 parts of asbestos, 20 parts of curing agent.

[0055] Further, in this embodiment, due to the high viscosity and high oxidation resistance of rosin resin, the bonding strength between the surface layer film and the first layer of insulating paper can be fur...

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Abstract

The invention provides insulating paper for a transformer. The insulating paper for the transformer comprises a surface thin film (1), a first insulating paper layer (2), an intermediate layer film (3) and a second insulating paper layer (4) which are sequentially laminated, wherein the surface thin film (1) comprises the components: epoxy resin, rosin resin, polytetrafluoroethylene, polyvinyl butyral, asbestos and a curing agent, both the first insulating paper layer (2) and the intermediate layer film (3), and the intermediate layer film (3) and the second insulating paper layer (4) are closely bonded through adhesives, and the adhesives are epoxy adhesives; and the epoxy adhesives comprise a modified epoxy adhesive and a curing agent, and the intermediate layer film (3) is a polyimide film or a polyester film or a polytetrafluoroethylene film. Through reasonable control on the components and content of the components of the surface thin film, the insulating paper has good physical,chemical and electrical properties, and has good environmental adaptability.

Description

technical field [0001] The invention relates to the technical field of transformer insulating paper, in particular to an insulating paper used for transformers. Background technique [0002] Insulating paper is widely used as insulating material for equipment such as motors, cables, capacitors and transformers, and is also the main component material of insulating materials such as laminated products, composite materials and prepreg materials. Due to the special use of insulating paper, it is required to have some characteristics different from other paper types, mainly including mechanical properties, electrical properties and thermal stability. Moreover, due to the different environments in which various types of electrical equipment are used, such as motors operating under hot and humid conditions, motors in chemical plants that are often exposed to high concentrations of corrosive chemical media, and motors operating under radioactive radiation, the insulating paper is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/38B32B27/32B32B27/30B32B27/18B32B27/06B32B33/00B32B27/28B32B27/36B32B7/12H01F27/32
Inventor 周顺奎任桂军闾传瑞
Owner NANTONG RIZHI ELECTRIC STUFF CO LTD
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