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Method for producing high strength thermal-insulating paper

A heat-insulating paper and high-strength technology, applied in the field of preparing high-strength heat-insulating paper, can solve the problems of slag ball loss, poor strength of inorganic ceramic fiber paper, and high thermal conductivity.

Inactive Publication Date: 2011-05-25
沈阳临德陶瓷研发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing inorganic ceramic fiber paper material can also play a role in heat insulation, its thermal conductivity is relatively high, and its heat insulation performance is poor.
In addition, the heat insulation layer of these precision components generally requires high strength and clean environment, while the strength of inorganic ceramic fiber paper is poor and fragile, and it is easy to drop slag balls and hair, so it is not suitable for use as a heat insulation layer material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A preparation method of high-strength heat-insulating paper, the specific process steps are as follows:

[0011] a. Firstly, glass fibers with a diameter of 0.2 μm, a length of 3 mm, and a shot content of 1% and coniferous fibers are added to a 2% polyvinyl alcohol aqueous solution in a mass percentage of 5:2, and are beaten Filter, and dry at 70°C to obtain a paper substrate;

[0012] b. prepare ethyl silicate hydrolyzate, wherein ethyl orthosilicate: ethanol: deionized water volume percentage is 1: 1: 4, add hydrochloric acid to adjust pH value to 2.3, stir 4 hours to obtain ethyl silicate hydrolyzate and then Ammonia water was added thereto to adjust the pH value to 7.5. Immerse the paper substrate into the above-mentioned proportioning solution, and perform supercritical CO 2 Dry for 36 hours to obtain a heat-insulating paper substrate composited with nano-silica airgel powder;

[0013] c. Then immerse the thermal insulation paper base material in a 2% polyvinyl ...

Embodiment 2

[0015] A preparation method of high-strength heat-insulating paper, the specific process steps are as follows:

[0016] a. First, glass fibers with a diameter of 0.3 μm, a length of 4 mm, and a slag content of 2% and coniferous fibers are added to a 1.5% polyvinyl alcohol aqueous solution in a mass percentage of 5:3, and then filtered by beating , and dried at 70°C to obtain a paper substrate;

[0017] b. prepare ethyl silicate hydrolyzate, wherein ethyl orthosilicate: ethanol: deionized water volume percentage is 1: 1: 5, add hydrochloric acid to adjust pH value to 2.3, stir 4 hours to obtain ethyl silicate hydrolyzate and then Ammonia water was added thereto to adjust the pH value to 7.8. Immerse the paper substrate into the above-mentioned proportioning solution, and perform supercritical CO 2 Dry for 40 hours to obtain a heat-insulating paper substrate composited with nano-silica airgel powder;

[0018] c. Then dip the thermal insulation paper base material into 3% poly...

Embodiment 3

[0020] A preparation method of high-strength heat-insulating paper, the specific process steps are as follows:

[0021] a. First, glass fibers with a diameter of 0.4 μm, a length of 5 mm, and a slag content of 3% and coniferous fibers are added to a 1% polyvinyl alcohol aqueous solution in a mass percentage of 5:4, and then filtered by beating , and dried at 70°C to obtain a paper substrate;

[0022] b. Prepare ethyl silicate hydrolyzate, wherein ethyl orthosilicate: ethanol: deionized water volume percentage is 1: 1: 6, add hydrochloric acid to adjust pH value to 2.3, stir 4 hours to obtain ethyl silicate hydrolyzate and then Ammonia water was added thereto to adjust the pH value to 8.1. Immerse the paper substrate into the above-mentioned proportioning solution, and perform supercritical CO 2 Dry for 44 hours to obtain a heat-insulating paper base material composited with nano-silica airgel powder;

[0023] c. Then dip the thermal insulation paper base material into 4% po...

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PUM

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Abstract

The invention discloses a method for producing high strength thermal-insulating paper, comprising the following steps of: a, mixing long glass fiber, softwood pulp and polyvinylalcohol PVA water solution, pulping, filtering and drying to obtain fiber paper substrate; b, soaking the paper substrate into siliceous sol having coagulant, gelling, performing supercritical CO2 drying to obtain the thermal-insulating paper substrate compounded with nano-silicon dioxide aerogel powder; and c, soaking the thermal-insulating paper substrate into the polyvinylalcohol PVA water solution, heating, pressurizing and drying to obtain the high strength thermal-insulating paper. The method can effectively improve the thermal-insulating performance and strength of the paper; the produced product is high in deflection, good in thermostability, excellent in high-temperature resistance performance, good in heat preservation performance and the like.

Description

technical field [0001] The invention relates to a preparation method of high-strength heat-insulating paper, which belongs to the technical field of new material application. Background technique [0002] In order to meet the heat insulation needs of some components in lasers, large electron microscopes and other equipment, a layer of 1-2mm heat insulation layer is usually stuck on the surface of the components to ensure that the components can work stably at around 120°C. In the existing heat insulation materials, inorganic ceramic fiber paper is generally used as a heat insulation layer in such a very narrow space. Although the existing inorganic ceramic fiber paper material can also play a role in heat insulation, its thermal conductivity is relatively high and its heat insulation performance is poor. In addition, the heat insulation layer of these precision components generally requires high strength and clean environment, while the strength of inorganic ceramic fiber p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00
Inventor 赵明韩绍娟许壮志薛健张明郭玉民
Owner 沈阳临德陶瓷研发有限公司
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