Zirconia fiber paper for cryogenic insulation and its preparation method and application

A zirconia fiber, low-temperature cryogenic technology, applied in chemical instruments and methods, synthetic cellulose/non-cellulose material pulp/paper, fiber raw material treatment, etc., can solve problems such as industrial production of zirconia fiber paper that has not yet been seen , to achieve the effects of stable properties, small outgassing rate and high reflectivity

Active Publication Date: 2019-03-15
山东德艾普节能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the above-mentioned high-temperature-resistant zirconia fiber and fiberboard, there is no report on the industrial production of zirconia fiber paper

Method used

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  • Zirconia fiber paper for cryogenic insulation and its preparation method and application
  • Zirconia fiber paper for cryogenic insulation and its preparation method and application
  • Zirconia fiber paper for cryogenic insulation and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1, the preparation of zirconia fiber paper

[0050] (1) The zirconia fibers with a diameter of 0.8-2.5 μm are chopped into chopped strands according to the length of 2 mm for later use.

[0051] Put the chopped strands into pure water and white water, add a binder (water glass), and stir for 24 hours to disperse evenly to obtain a slurry with a mass concentration of 0.08%, which is set aside;

[0052] (2) Pump the prepared slurry to the headbox, and evenly distribute it on the polyester forming net after entering the headbox through a steady flow, and form a wet paper sheet on the net;

[0053] Carry out vacuum filtration for wet paper sheets, control the suction filtration pressure at 0.2-0.5MPa, and further squeeze through pressing rollers, control the humidity of wet paper sheets not higher than 85%;

[0054] The wet paper is transferred to the composite aluminum foil through a nylon roller, and the thickness of the aluminum foil is about 0.006mm;

[005...

Embodiment 2

[0058] Embodiment 2, the preparation of zirconia fiber paper

[0059] (1) Cut the zirconia fibers with a diameter of 0.9-2.4 μm into chopped strands according to the length of 1 mm for future use.

[0060] Put the chopped strands into pure water and white water, add a binder (water glass), and stir for 24 hours to disperse evenly to obtain a slurry with a mass concentration of 0.03%, which is set aside;

[0061] (2) Pump the prepared slurry to the headbox, and evenly distribute it on the polyester forming net after entering the headbox through a steady flow, and form a wet paper sheet on the net;

[0062] Carry out vacuum filtration for wet paper sheets, control the suction filtration pressure at 0.2-0.5MPa, and further squeeze through pressing rollers, control the humidity of wet paper sheets not higher than 85%;

[0063] The wet paper is transferred to the composite aluminum foil through a nylon roller, and the thickness of the aluminum foil is about 0.006mm;

[0064] The ...

Embodiment 3

[0067] Embodiment 3, the preparation of zirconia fiber paper

[0068] (1) Cut the zirconia fibers with a diameter of 0.7-2.2 μm into chopped strands according to the length of 3 mm for later use.

[0069] Put the chopped strands into pure water and white water, add a binder (water glass), and stir for 24 hours to disperse evenly to obtain a slurry with a mass concentration of 0.03%, which is set aside;

[0070] (2) Pump the prepared slurry to the headbox, and evenly distribute it on the polyester forming net after entering the headbox through a steady flow, and form a wet paper sheet on the net;

[0071] Carry out vacuum filtration for wet paper sheets, control the suction filtration pressure at 0.2-0.5MPa, and further squeeze through pressing rollers, control the humidity of wet paper sheets not higher than 85%;

[0072] The wet paper is transferred to the composite aluminum foil through a nylon roller, and the thickness of the aluminum foil is about 0.006mm;

[0073] The z...

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Abstract

The invention relates to zirconia fiber paper used in a low-temperature cryogenic insulation environment and a preparation method and application of the zirconia fiber paper. In the zirconia fiber paper, the ZrO2 mass content is no less than 85%, and the diameter of a zirconia fiber is in a range of 0.5-2.5 [mu]m. The preparation method comprises the following steps: (1) cutting zirconia fibers into short fibers, dispersing the short fibers in pure water or / and plain boiled water, adding an additive, and performing uniform stirring and dispersion to obtain a thick liquid; and (2) removing residues from the thick liquid, putting the obtained thick liquid on a net for fishing, and performing pumping filtration dehydration, squeezing and drying to obtain the zirconia fiber paper. The zirconia fiber paper is good in radio resistance and thermal isolation, is small in air discharging rate in vacuum, is not prone to burn when the zirconia fiber paper meets open flame, and has stable property in a low-temperature environment, such as liquid nitrogen and liquefied natural gas.

Description

technical field [0001] The invention relates to a zirconia fiber paper, a preparation method and its application as a high-vacuum multi-layer insulation material, and belongs to the technical field of heat insulation materials applied to storage and transportation equipment such as cryogenic containers and pipelines. Background technique [0002] At present, the most representative ultra-low temperature insulation materials are glass fiber paper and rigid polyurethane foam. The biggest disadvantage of polyurethane foam is its poor flame retardancy, poor dimensional stability at low temperature, and easy deformation and cracking. It is dangerous for the application of LNG storage and transportation equipment. Glass fiber ultra-low temperature insulation materials need to be combined with low-weight aluminum foil or non-woven fabrics in multiple layers to make a quilt-like insulation layer and wrap them on storage equipment for liquid gas or frozen samples. [0003] CN1038363...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/48D21H15/02D21F11/00B32B9/04B32B15/14
CPCB32B9/041B32B15/14B32B2262/00B32B2262/101B32B2307/212B32B2307/304D21F11/00D21H13/48D21H15/02
Inventor 张光辉许东刘雪松朱陆益王新强甘信柱
Owner 山东德艾普节能材料有限公司
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