Method for preparing of insulating paper containing modified montmorillonite

A technology of montmorillonite and insulating paper, which is applied in the field of transposition wire core packaging materials, can solve the problems of unstable performance and uneven distribution of insulating paper, so as to reduce the relative permittivity, suppress partial discharge, and improve the impact. The effect of wear strength

Active Publication Date: 2017-01-11
无锡益联机械有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, some active ingredients in the insulating paper prepared by this method cannot be evenly distributed in the paper, resulting in unstable performance

Method used

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  • Method for preparing of insulating paper containing modified montmorillonite

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Effect test

Embodiment 1

[0021] A preparation method for insulating paper containing modified montmorillonite, comprising the following steps:

[0022] Step 1, preparation of concentrated pulp: the cardboard is cracked by a pulper and then sent to a refiner for refining. The air source of the refiner is 0.5MPa, and the linear speed difference between the chassis and the knife roller is 5.9m / s, the voltage is 400V, the three-phase is 55Hz, and the beating pressure is 1.8kg / cm; the deflaking machine is used for deflaking treatment, and then the concentration of the pulp after the deflaking treatment is concentrated to 4.8%;

[0023] Step 2, preparation of modified montmorillonite: in parts by weight, mix 19 parts of montmorillonite, 11 parts of nano-zinc oxide, 7 parts of sodium chloride, 6 parts of sodium hydroxide, 1 part of magnesium sulfate, and 22 parts of water , the suspension was mechanically stirred and dispersed at a speed of 5000r / min, stirred for 10 minutes, and then ultrasonically disperse...

Embodiment 2

[0028] A preparation method for insulating paper containing modified montmorillonite, comprising the following steps:

[0029] Step 1, preparation of concentrated pulp: the cardboard is cracked by a pulper and then sent to a refiner for refining. The air source of the refiner is 0.8MPa, and the linear speed difference between the chassis and the knife roller is 6.9m / s. The voltage is 480V, the three-phase is 60Hz, and the beating pressure is 3.8kg / cm; the deflaking machine is used for deflaking treatment, and then the concentration of the pulp after the deflaking treatment is concentrated to 5.2%;

[0030] Step 2, preparation of modified montmorillonite: in parts by weight, mix 36 parts of montmorillonite, 13 parts of nano-zinc oxide, 12 parts of sodium chloride, 9 parts of sodium hydroxide, 5 parts of magnesium sulfate, and 31 parts of water , the suspension was mechanically stirred and dispersed at a speed of 6000r / min, stirred for 13 minutes, and ultrasonically dispersed f...

Embodiment 3

[0035] A preparation method for insulating paper containing modified montmorillonite, comprising the following steps:

[0036] Step 1, preparation of concentrated pulp: the cardboard is cracked by a pulper and then sent to a refiner for refining. The air source of the refiner is 1.2MPa, and the linear speed difference between the chassis and the knife roller is 7.5m / s. The voltage is 520V, the three-phase is 65Hz, and the beating pressure is 4.2kg / cm; the deflaking machine is used for deflaking treatment, and then the concentration of the pulp after the deflaking treatment is concentrated to 5.6%;

[0037] Step 2, preparation of modified montmorillonite: in parts by weight, mix 42 parts of montmorillonite, 17 parts of nano-zinc oxide, 16 parts of sodium chloride, 12 parts of sodium hydroxide, 7 parts of magnesium sulfate, and 38 parts of water , the suspension was mechanically stirred and dispersed at a speed of 6400r / min, stirred for 16 minutes, and then ultrasonically dispers...

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Abstract

The invention discloses a method for preparing of insulating paper containing modified montmorillonite. The method comprises the steps of concentrated pulp preparing, modified montmorillonite preparing, modified filler preparing and insulating paper preparing. Compared with existing technology, the preparing method has the following advantages: (1) by modifying montmorillonite first, the invention then make a modification on insulating paper packing and therefore can significantly improve its breakdown strength, reduce its relative dielectric constant and effectively restrain the emergence and development of partial discharge of the oil paper; (2) the modified montmorillonite and insulating paper packing can evenly disperse physically in insulating paper, without occurrence of intercalation or interlaminar delamination phenomenon.

Description

technical field [0001] The invention belongs to the field of packaging materials for transposed wire cores, and relates to insulating paper, in particular to a preparation method of insulating paper containing modified montmorillonite. Background technique [0002] Cellulose insulating paper is one of the most widely used internal insulating materials in oil-immersed power transformers. Since it cannot be replaced during operation, its mechanical and insulating properties directly determine the service life of the transformer. In the actual transformer, the insulating paper is subjected to high-intensity electric field stress for a long time, and once a breakdown occurs, the transformer will fail. If the electrical properties of insulating paper can be improved, the usage of insulating paper can be saved, the working life of insulating paper can be extended, the width of transformer oil gap can be reduced, and the volume of transformer and core loss can be limited. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21H17/69D21H21/14D21F11/00H01B3/52
CPCD21F11/00D21H11/14D21H17/69D21H21/14H01B3/52
Inventor 邱勤晓邱益诚王亚芳
Owner 无锡益联机械有限公司
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