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Preparation method of high-heat-conductivity electric-insulation paper

A technology with electrical insulation and high thermal conductivity, which is applied in the cross-field of paper industry and material industry, can solve the problems of poor thermal conductivity, etc., and achieve the effect of enhancing electrical insulation performance, improving thermal conductivity, and combining tightly

Active Publication Date: 2017-03-15
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiency of poor thermal conductivity of traditional insulating paper, the purpose of the present invention is to prepare a high thermal conductivity electrical insulating paper with high thermal conductivity, which not only meets the strength performance and insulation performance requirements of insulating paper in electrical equipment, but also can make the internal heat Faster conduction, improving the heat dissipation performance of the device

Method used

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Examples

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Effect test

Embodiment 1

[0019] The uncolored coniferous wood pulp board is pretreated, and the pretreatment process is as follows: 632.5g uncolored softwood pulp board is torn off and soaked in 5L deionized water for 4 hours, and then torn into small pulp pieces of 25mm×25mm. Then pour the paddles into the Wall-E beater, add 17L deionized water to the water tank, so that the pulp concentration reaches 2.5%, start the beater to decompose until there are no small pulp lumps. Finally, hang the heavy thallium with a mass of 5kg on the lever arm and start beating until the degree of beating is 53 ° SR for standby; the h-BN thermally conductive filler particles are pretreated. The pretreatment process is: disperse 0.455g H-BN filler particles in In deionized water, the mass fraction of the filler in the dispersion is 2%, and stirred with a mixer for 10000r; then, amphoteric starch is added to the filler dispersion in an amount of 5% of the mass of the filler, and 10000r is used to decompose with a decompose...

Embodiment 2

[0021] The uncolored coniferous wood pulp board is pretreated, and the pretreatment process is as follows: 632.5g uncolored softwood pulp board is torn off and soaked in 5L deionized water for 4 hours, and then torn into small pulp pieces of 25mm×25mm. Then pour the paddles into the Wall-E beater, add 17L deionized water to the water tank, so that the pulp concentration reaches 2.5%, start the beater to decompose until there are no small pulp lumps. Finally, hang the heavy thallium with a mass of 5kg on the lever arm and start beating until the degree of beating is 53 ° SR for standby; the h-BN thermally conductive filler particles are pretreated. The pretreatment process is: disperse 0.910g H-BN filler particles in In deionized water, the mass fraction of the filler in the dispersion is 2%, and stirred with a mixer for 10000r; then, amphoteric starch is added to the filler dispersion in an amount of 5% of the mass of the filler, and 10000r is used to decompose with a decompose...

Embodiment 3

[0023] The uncolored coniferous wood pulp board is pretreated, and the pretreatment process is as follows: 632.5g uncolored softwood pulp board is torn off and soaked in 5L deionized water for 4 hours, and then torn into small pulp pieces of 25mm×25mm. Then pour the paddles into the Wall-E beater, add 17L deionized water to the water tank, so that the pulp concentration reaches 2.5%, start the beater to decompose until there are no small pulp lumps. Finally, hang the heavy thallium with a mass of 5kg on the lever arm and start beating until the degree of beating is 53 ° SR for standby; the h-BN thermally conductive filler particles are pretreated. The pretreatment process is: disperse 1.364g of H-BN filler particles in In deionized water, the mass fraction of the filler in the dispersion is 2%, and stirred with a mixer for 10000r; then, amphoteric starch is added to the filler dispersion in an amount of 5% of the mass of the filler, and 10000r is used to decompose with a decomp...

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Abstract

The invention discloses a preparation method of high-heat-conductivity electric-insulation paper. The method comprises the following steps: 1) carrying out pretreatment on a natural-color softwood pulp board; 2) carrying out pretreatment on heat-conducting filler particles; 3) carrying out primary fluffing on the pretreated pulp in a fluffer; adding the filler particles treated by the step 2), and carrying out secondary fluffing; finally adding retention aids, and carrying out tertiary fluffing to obtain a suspension; and 4) injecting the suspension obtained in the step 3) into a paper former, carrying out dewatering formation, pressing, and drying to obtain the high-heat-conductivity electric-insulation paper. By using the atural-color softwood pulp fibers and hexagonal boron nitride particles as the raw materials, amphoteric starch and cationic polyacrylamide are used as retention aids to enhance the retention rate of the filler and fine components; and the pulping, filling, fluffing, formation, pressing and drying are carried out to obtain the high-heat-conductivity electric-insulation paper. The high-heat-conductivity electric-insulation paper has the advantages of high heat conductivity coefficient, and can enhance the heat dispersion property when being applied to electrical equipment.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of papermaking industry and material industry, and in particular relates to a preparation method of high thermal conductivity electrical insulating paper. Background technique [0002] Paper has a long history as an insulating material for electrical equipment. It is widely used as insulating material in motors, cables, capacitors and transformers. It is also the main component of insulating materials such as laminates, composite materials and prepreg materials. Traditional electrical insulating paper is a thin sheet-like material formed of plant fibers, mineral fibers, synthetic fibers or their blends, which are deposited on a paper machine by using water as a medium. [0003] In actual use, large and medium-sized high-voltage generators and motors will generate a lot of heat during operation. If the heat is not exported to electrical equipment in time, it will directly affect its working...

Claims

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Application Information

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IPC IPC(8): D21H27/12D21H11/08D21H17/67D21H17/28D21H17/37D21H21/10D21F13/10
CPCD21F13/10D21H11/08D21H17/28D21H17/37D21H17/67D21H21/10D21H27/00
Inventor 戴红旗俞智怀王秀
Owner NANJING FORESTRY UNIV
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