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Composite mica paper and preparation method thereof

A kind of technology of compound mica and mica paper

Active Publication Date: 2017-03-15
株洲市绝缘材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength and toughness of mica paper directly made from mica sheets are not good, and cannot meet the needs of many industries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Mix mica powder (120 mesh), urea-formaldehyde resin (weight-average molecular weight: 5,000), glass fiber (length: 0.3mm), polyacrylamide, ethylenediaminetetraacetic acid, and water in a weight ratio of 200:30: Stir and mix at 10:5:5:100 to make mica pulp; finally, make mica paper from the obtained mica pulp, and the mica paper is a mica layer; before 1), wash the mica with water with a liquid-solid ratio of 4 slices until the turbidity of water is 11°, and washed 3 times with water.

[0023] 2) earlier novolac epoxy resin (weight-average molecular weight is 20,000), polyimide resin (weight-average molecular weight is 30,000), ethylene glycol ether, alcohol fat twelve, dibutyl phthalate and water Mix according to the weight ratio of 100:50:10:1:1:100, then perform heat treatment at 180° C. for 1.5 hours, and finally extrude to obtain a resin layer.

[0024] 3) The prepared mica paper was placed on the prepared resin layer, and at 170°C, the pressure was selected to ...

Embodiment 2

[0026] 1) Mix mica powder (180 mesh), urea-formaldehyde resin (weight-average molecular weight: 20,000), glass fiber (length: 0.5mm), polyacrylamide, ethylenediaminetetraacetic acid, and water in a weight ratio of 220:33: Stir and mix at 15:7:8:100 to make mica pulp; finally make mica paper from the obtained mica pulp, and the mica paper is a mica layer; before 1), wash the mica with water with a liquid-solid ratio of 5 slices until the turbidity of water is 10°, and washed 3 times with water.

[0027] 2) earlier novolac epoxy resin (weight-average molecular weight is 30,000), polyimide resin (weight-average molecular weight is 40,000), ethylene glycol ether, alcohol fat twelve, dibutyl phthalate and water The mixture was mixed according to the weight ratio of 100:80:13:3:3:130, followed by heat treatment at 190° C. for 1.0 h, and finally extruded to obtain a resin layer.

[0028] 3) Place the prepared mica paper on top of the prepared resin layer, heat press and compound at ...

Embodiment 3

[0030] 1) Mix mica powder (200 mesh), urea-formaldehyde resin (weight-average molecular weight: 25,000), glass fiber (length: 0.6mm), polyacrylamide, ethylenediaminetetraacetic acid, and water in a weight ratio of 250:35: Stir and mix at 20:10:9:100 to make mica pulp; finally make mica paper from the obtained mica pulp, and the mica paper is a mica layer; before 1), wash the mica with water with a liquid-solid ratio of 6 Slice until the turbidity of water is 11°, and wash 2 times with water.

[0031] 2) earlier novolac epoxy resin (weight-average molecular weight is 40,000), polyimide resin (weight-average molecular weight is 50,000), ethylene glycol ether, alcohol fat twelve, dibutyl phthalate and water Mixing according to the weight ratio of 100:95:15:5:5:150, followed by heat treatment at 200°C for 0.5h, and finally extrusion molding to obtain a resin layer.

[0032] 3) Place the prepared mica paper on top of the prepared resin layer, heat press and compound at 175° C. wit...

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Abstract

The invention discloses composite mica paper and a preparation method thereof. The preparation method includes the steps of preparation of a mica layer, preparation of a resin layer and compositing of the mica layer and the resin layer, wherein the preparation of the mica layer includes the steps: firstly, washing mica sheets with water, and drying to obtain dry mica sheets; then calcining the dry mica sheets to obtain a mica powder; next stirring and mixing the mica powder, urea formaldehyde resin, glass fibers, polyacrylamide, ethylenediaminetetraacetic acid and water to prepare mica paper pulp; and finally, papermaking the mica paper pulp to obtain the mica paper. The mica paper is the mica layer; the mica paper is placed on the resin layer, firstly, hot pressing compounding is carried out, then naturally cooling is carried out, and thus the composite mica paper is obtained. In addition to having insulation, high temperature resistance and other excellent properties of the mica paper, the composite mica paper has high mechanical strength and toughness.

Description

technical field [0001] The invention relates to mica paper, in particular to composite mica paper and a preparation method thereof. Background technique [0002] Mica is a general term for a class of hydrous aluminosilicates. Mica has excellent properties such as insulation and high temperature resistance, and is widely used in coatings, paints, fire protection and electrical industries. Among them, making mica into mica paper is one of the most widely used mica applications. [0003] At present, mica paper has all the varieties corresponding to sheet mica products. The industry mainly uses the insulation and heat resistance of mica paper, as well as its acid and alkali resistance, to be used as insulating materials for electrical equipment and electrical equipment. However, the mechanical strength and toughness of the mica paper directly prepared from the mica sheets are not good, and cannot meet the needs of various industrial applications. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/38D21H15/10D21H13/44D21H13/40D21H17/37D21H17/14D21H17/49B32B19/04B32B27/10B32B27/28B32B37/06B32B37/10B32B37/15
CPCB32B19/045B32B27/06B32B27/28B32B37/10B32B37/153B32B2307/206B32B2307/306B32B2307/558D21H13/40D21H13/44D21H15/10D21H17/14D21H17/37D21H17/49D21H27/38
Inventor 马西健
Owner 株洲市绝缘材料有限责任公司
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