Transformer coil interlayer insulating material, modified epoxy resin and preparation method

An insulating material and epoxy resin technology, which is applied in chemical instruments and methods, insulators, electronic equipment, etc., can solve the problems of low qualification rate, increased production cost, and difficulty in controlling the limit of the electromagnetic wire on the coil end face, so as to reduce the production cost. , Improve production efficiency, the effect of pollution-free environment

Active Publication Date: 2018-03-16
NANTONG RIZHI ELECTRIC STUFF CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The interlayer insulation of existing medium and low-voltage transformer coils is made of two layers of Type II capacitor paper and film composite insulation material. Because the surface of the material is relatively smooth, and the electromagnetic wire used in the coil is relatively thin, the minimum diameter is 0.08mm. During the winding process, the limit of the electromagnetic wire on the coil end face is difficult to control, and the electromagnetic wire is prone to shift, loose and fall off; the pass rate is low and does not exceed 80%, resulting in unstable product quality and hidden dangers to the normal operation of the transformer
The production cost has increased significantly, and the subsequent disposal of unqualified products is expensive, which is not conducive to environmental protection

Method used

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  • Transformer coil interlayer insulating material, modified epoxy resin and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] combine figure 1 As shown, the quick-curing fiber paper is a three-layer soft composite material made of two layers of electrolytic capacitor paper bonded by a polyester film adhesive. It is then coated on both sides with diamond-shaped or round-shaped special modified medium-temperature epoxy resin and baked at a temperature of 80 ° C to 120 ° C at 20 m / min.

[0032] In this example, the modified medium temperature epoxy resin contains the following components: 0191 epoxy resin: 60 parts; E39D epoxy resin: 18 parts; toughening agent HDY-090: 1 part; accelerator DMP-30: 10 parts Parts; Methylimidazole: 2 parts; Curing agent JHB-591B: 9 parts, each component is mixed and prepared by reactor polymerization.

[0033] Polymerization conditions are satisfied: Add materials according to the proportion of components for dispersion and mixing, heat to 150°C-180°C for 2-3 hours, and feed nitrogen into the reactor at 2 cubic meters per hour, and stir for 1 hour after the materia...

Embodiment 2

[0036] Other conditions are the same as in Example 1, and the components of the modified medium temperature epoxy resin are changed.

[0037] Modified medium temperature epoxy resin contains the following components: 0191 epoxy resin: 45 parts; E39D epoxy resin: 20 parts; toughening agent HDY-090: 2 parts; accelerator DMP-30: 8 parts; methylimidazole : 4 parts; curing agent JHB-591B: 10 parts, each component is mixed and prepared by reactor polymerization.

[0038] Polymerization conditions are satisfied: Add materials according to the proportion of components for dispersion and mixing, heat to 150°C-180°C for 2-3 hours, and feed nitrogen into the reactor at 2 cubic meters per hour, and stir for 1 hour after the materials are melted. After 2 hours, turn on the circulating water cooling system to cool down to 90°C to 120°C, draw a vacuum, stop the vacuum when there is no distillate, and cool the water; when the temperature drops to 60°C to 80°C, release the material and carry o...

Embodiment 3

[0041] Other conditions are the same as in Example 1, and the components of the modified medium temperature epoxy resin are changed.

[0042] Modified medium temperature epoxy resin contains the following components: 0191 epoxy resin: 40 parts; E39D epoxy resin: 10 parts; toughening agent HDY-090: 2 parts; accelerator DMP-30: 6 parts; methylimidazole : 3 parts; curing agent JHB-591B: 4 parts, each component is mixed and prepared by reactor polymerization.

[0043] Polymerization conditions are satisfied: Add materials according to the proportion of components for dispersion and mixing, heat to 150°C-180°C for 2-3 hours, and feed nitrogen into the reactor at 2 cubic meters per hour, and stir for 1 hour after the materials are melted. After 2 hours, turn on the circulating water cooling system to cool down to 90°C to 120°C, draw a vacuum, stop the vacuum when there is no distillate, and cool the water; when the temperature drops to 60°C to 80°C, release the material and carry ou...

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Abstract

The invention discloses a transformer coil interlayer insulating material, a modified epoxy resin and a preparation method. The material includes a base material and a modified epoxy resin layer formed on the base material surface. The modified epoxy resin layer comprises the following materials by weight: 40-60 parts of 0191 epoxy resin; 10-20 parts of E39D epoxy resin; 1-2 parts of a tougheningagent; 6-10 parts of an accelerant; 2-4 parts of methylimidazole; and 4-10 parts of a curing agent. The material provided by the invention is convenient to use, and can bond to a wire instantly undera mold temperature heat transfer condition, under the premise of ensuring electrical performance and mechanical performance, greatly guarantees the qualified rate of coil winding, improves the production efficiency, lowers the production cost, and is pollution-free to the environment.

Description

technical field [0001] The present application relates to a fast-curing fiber paper, in particular to a transformer coil interlayer insulation material, a modified epoxy resin and a preparation method. Background technique [0002] The interlayer insulation of existing medium and low-voltage transformer coils is made of two layers of Type II capacitor paper and film composite insulation material. Because the surface of the material is relatively smooth, and the electromagnetic wire used in the coil is relatively thin, the minimum diameter is 0.08mm. During the winding process, the limit of the electromagnetic wire on the coil end face is difficult to control, and the electromagnetic wire is prone to displacement, loosening and falling off; the pass rate is lower than 80%, resulting in unstable product quality and hidden dangers to the normal operation of the transformer. The production cost has increased significantly, and the subsequent disposal of unqualified products is e...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): D21H19/24D21H27/12D21H27/30H01B3/52B32B29/00B32B7/12C08L63/00B29C65/48
CPCB29C65/48B29C66/45B32B7/12B32B29/005B32B2250/02B32B2250/26B32B2255/12B32B2255/26B32B2307/206B32B2457/04C08L63/00C08L2205/025D21H19/24D21H27/30H01B3/52
Inventor周顺奎闾传瑞任桂军
OwnerNANTONG RIZHI ELECTRIC STUFF CO LTD