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Flexible heat insulation material and preparation method thereof

A technology of flexible heat insulation material and heat insulation layer, which can be applied in heat exchange equipment, pipeline protection through heat insulation, mechanical equipment, etc., can solve the problems of poor heat insulation performance and inability to meet high-efficiency heat insulation, and achieve heat insulation performance Good, excellent chemical stability, excellent radiation shielding effect

Active Publication Date: 2015-04-29
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor found that when the above-mentioned existing flexible heat insulation material is used at a temperature exceeding 1000°C, due to the effect of heat radiation, its thermal conductivity will be greater than 0.2W / m·K, which will deteriorate the heat insulation performance and fail to meet many requirements. Highly insulated workplace

Method used

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  • Flexible heat insulation material and preparation method thereof
  • Flexible heat insulation material and preparation method thereof

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preparation example Construction

[0042] On the one hand, an embodiment of the present invention provides a method for preparing a flexible heat insulating material, and the method for preparing the flexible heat insulating material mainly includes the following steps:

[0043] 1) Mix 0-20 parts by weight of pulp, 80-100 parts by weight of alumina fiber and 600-2000 parts by weight of water, and stir evenly to obtain raw material slurry.

[0044] Specifically, the main component of pulp in this step is wood fiber. The role of pulp is mainly to increase the strength of alumina fibers and improve the flexibility of alumina fibers, so that the final heat insulation material has the flexibility of paper.

[0045] In this step, the alumina fiber is preferably chopped fiber, the alumina content in the alumina fiber is greater than 90%, and the alumina fiber density is greater than 3.0g / cm 3, the diameter is 1-10 μm, and the length is preferably 1-5 mm. The alumina fiber in this step has low thermal conductivity, h...

Embodiment 1

[0073] 1) Take 6 parts by weight of paper pulp and add it into 60 parts by weight of deionized water, and then stir evenly in a pulper to obtain 66 parts by weight of paper pulp slurry.

[0074] 2) Add 94 parts by weight of alumina fibers and 66 parts by weight of paper pulp slurry prepared in step 1) into 1566 parts by weight of deionized water, and stir evenly to obtain raw material slurry.

[0075] 3) Lay a layer of non-woven fabric on the bottom of the vacuum filtration device, add the raw material slurry into the vacuum filtration device, start the vacuum pump for suction filtration, part of the water in the raw material slurry will be discharged, and the alumina fibers will remain On the non-woven fabric, the solid phase content in the raw material slurry is controlled to be 70% to obtain an alumina fiber preform.

[0076] 4) Evenly brush white latex on the surface of the graphite foil and cover one side of the alumina fiber prefabricated body to obtain a heat insulating...

Embodiment 2

[0079] 1) Take 10 parts by weight of paper pulp and add it into 100 parts by weight of deionized water, and then stir evenly in a pulper to obtain 110 parts by weight of paper pulp slurry.

[0080] 2) Add 90 parts by weight of alumina fibers and 110 parts by weight of paper pulp slurry prepared in step 1) into 1500 parts by weight of deionized water, and stir evenly to obtain raw material slurry.

[0081] 3) Lay a layer of Dacron cloth on the bottom of the vacuum filtration device, add the raw material slurry obtained in step 2) into the vacuum filtration device, start the vacuum pump for suction filtration, and part of the moisture in the raw material slurry is discharged, and the alumina The fibers are left on the non-woven fabric, and the solid phase content in the slurry is controlled to be 70% to obtain an alumina fiber preform.

[0082] 4) Evenly brush white latex on the surface of the graphite foil and cover it on one side of the alumina fiber prefabricated body to obta...

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Abstract

The invention discloses a flexible heat insulation material and a preparation method thereof, belongs to the technical field of heat insulation and solves the problems of high heat conduction coefficient and poor heat resistance of the existing flexible heat insulation material when the temperature is higher than 1000 DEG C. The preparation method of the flexible heat insulation material mainly comprises the following steps: uniformly mixing 0-20 parts by weight of paper pulp, 80-100 parts by weight of aluminum oxide fibers and 600-2000 parts by weight of water to obtain raw material pulp; carrying out vacuum suction filtration on the raw material pulp to obtain an aluminum oxide fiber perform which is provided with a first surface and a second surface opposite to each other; pasting graphite foils to the first surface and / or the second surface of the aluminum oxide fiber perform to obtain heat insulation layer performs; pasting, pressing and drying at least two heat insulation performs to obtain the flexible heat insulation material. The invention mainly aims to provide the flexible heat insulation material which is still low in heat conduction coefficient at high temperature and excellent in heat insulation performance.

Description

technical field [0001] The invention relates to the technical field of thermal insulation, in particular to a flexible thermal insulation material and a preparation method thereof. Background technique [0002] The thermal insulation materials produced industrially are mainly divided into two categories: inorganic thermal insulation materials and organic thermal insulation materials. Organic heat insulation materials are mainly various polymer foam materials, but the use temperature of this kind of heat insulation materials is low (most use temperatures are lower than 100°C). Inorganic heat insulation materials have good heat resistance, and their heat insulation performance is still good when used at higher temperatures; inorganic heat insulation materials can be divided into hard heat insulation materials and soft heat insulation materials. Hard heat insulation materials are easy to break, have a large construction loss, must be preformed, require a lot of molds, are expe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/22B32B9/00F16L59/02
CPCB32B5/22B32B7/12B32B9/007B32B2262/10F16L59/02
Inventor 张世超陈玉峰王广海孙浩然张峰孙现凯李世新石兴方凯
Owner CHINA BUILDING MATERIALS ACAD
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