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Preparation of polyimide fiber insulation paper for transformers

A technology of polyimide fiber and insulating paper, which is applied in the field of transformers to achieve the effect of improving mechanical properties, uniform distribution and excellent performance

Inactive Publication Date: 2016-02-24
TONGLING SANJIA TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using inorganic fillers to modify insulating paper can obtain insulating paper with better performance, but there are few researches on this aspect at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A preparation of polyimide fiber insulating paper for transformers, which is prepared from the following raw materials in parts by weight (kg): nano-titanium dioxide 10, barium titanate 2, phenolic resin 2, pulp board 500, sodium silicate 1.3, carboxylate Sodium methylcellulose 1, polyimide fiber 3, polyamic acid resin 2.3, water-based wax emulsion 0.4, antimony dioxide 0.6, appropriate amount of deionized water.

[0014] The preparation of the polyimide fiber insulating paper for a transformer is prepared by the following specific steps:

[0015] (1) Dry nano-titanium dioxide and barium titanate in an oven at 100°C for 30 minutes, add them to 0.5Wt% silane coupling agent kh550 absolute ethanol solution after cooling, and then reflux the solution to condense, take it out and bake it dry milling for use;

[0016] (2) Mix the phenolic resin with a solid content of 15% and the product prepared in step (1) evenly, and then heat it to 80°C and stir for 0.5h, keep it at a co...

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Abstract

The invention discloses preparation of a polyimide fiber insulation paper for transformers. The polyimide fiber insulation paper for transformers is prepared from the following raw materials by weight part: 10-12 of nano-titanium dioxide, 2-3 of barium titanate, 2-3 of phenolic resin, 500-550 of a pulp board, 1.3-1.5 of sodium silicate, 1-1.3 of sodium carboxymethyl cellulose, 3-3.5 of polyimide fiber, 2.3-2.6 of polyamic acid resin, 0.4-0.5 of an aqueous wax emulsion, 0.6-0.8 of antimony dioxide, and a proper amount of deionized water. The preparation method provided by the invention has the advantages of simplicity, low cost and wide raw material sources, and the prepared insulating paper has excellent performance, thus being worthy of promotion.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to the preparation of polyimide fiber insulating paper 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H13/26D21H17/67D21H27/12H01B3/52H01F27/32
CPCD21H15/10D21H13/26D21H17/26D21H17/48D21H17/55D21H17/60D21H17/66D21H17/67D21H17/74D21H21/14D21H21/143D21H21/18D21H21/34H01B3/52H01F27/32
Inventor 李新满
Owner TONGLING SANJIA TRANSFORMER
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