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Low-density carbon fiber hard insulation quilt and preparation method thereof

A technology of rigid thermal insulation felt and carbon fiber, which is applied to chemical instruments and methods, protective equipment, and other household appliances. It can solve the problems of high production cost, high longitudinal fiber content, and many materials, so as to achieve good thermal insulation performance and improve thermal insulation. performance, the effect of reducing the number of

Active Publication Date: 2016-04-13
QINGDAO ADVANCED GRAPHITE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as CN101948327A, CN103568385A, the products produced by them have too high longitudinal fiber content, and the thermal insulation effect is not ideal
Moreover, the existing carbon fiber rigid thermal insulation felt is formed by mixing carbon fiber in the slurry by wet vacuum filtration, such as Chinese patent application 201310489217.9, the thermal insulation felt made by wet forming has the characteristics of high density and compact structure, and this This feature determines that its thermal insulation performance is poor; and under the same volume, high density requires more materials, so the production cost is relatively high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Low-density carbon fiber hard insulation quilt and preparation method thereof
  • Low-density carbon fiber hard insulation quilt and preparation method thereof
  • Low-density carbon fiber hard insulation quilt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of low-density carbon fiber rigid insulation felt, the steps are as follows:

[0033] (1) Use polyacrylonitrile-based carbon fiber with a carbon content ≥ 92% as raw material, cut the carbon fiber into 3-30mm, comb it into wool with a carding machine and make it into a net tire, and the weight of the net tire is 50g / m 2 , thickness is 4mm, density is 0.06g / cm 3 , the carbon fiber arrangement direction is basically consistent with the plane where the mesh tire is located;

[0034] (2) Use acupuncture method to combine 8 layers of mesh tires into a mesh tire unit, and the density of needle punching is 3-30 needles / cm 2 ; The needle punching direction is longitudinal, and the mesh tire unit laying direction is horizontal, that is, the needle punching direction is perpendicular to the plane where the mesh tire unit is located.

[0035] (3) Adopt mist spraying method to carry out one-sided or double-sided spraying phenolic resin adhesive to the net tir...

Embodiment 2

[0043] A preparation method of low-density carbon fiber rigid insulation felt, the steps are as follows:

[0044] (1) Use polyacrylonitrile-based carbon fiber with a carbon content ≥ 92% as raw material, cut the carbon fiber into 3-30mm, comb it into wool with a carding machine and make it into a net tire, and the weight of the net tire is 100g / m 2 , thickness is 4mm, density is 0.07g / cm 3 , the carbon fiber arrangement direction is basically consistent with the plane where the mesh tire is located;

[0045] (2) Using the acupuncture method, 8 layers of mesh tires are needled and compounded into a mesh tire unit, and the density of needle punching is 15-20 needles / cm; The stabbing direction is perpendicular to the plane where the mesh tire unit is located.

[0046] (3) Use the mist spraying method to carry out single-sided or double-sided spraying of phenolic resin adhesive to the net tire unit made above, and the amount of glue sprayed is 1.0kg / m 2 ;

[0047] (4) Put 0.5m...

Embodiment 3

[0054] A preparation method of low-density carbon fiber rigid insulation felt, the steps are as follows:

[0055] (1) Use polyacrylonitrile-based carbon fiber with a carbon content ≥ 92% as raw material, cut the carbon fiber into 3-30mm, comb it into wool with a carding machine and make it into a net tire, and the weight of the net tire is 100g / m 2 , thickness is 4mm, density is 0.07g / cm 3 , the carbon fiber arrangement direction is basically consistent with the plane where the mesh tire is located;

[0056] (2) Use the needle punching method to combine the 8-layer mesh tire into a mesh tire unit, and the needle punching density is 10-20 needles / cm 2 ; The needle punching direction is longitudinal, and the mesh tire unit laying direction is horizontal, that is, the needle punching direction is perpendicular to the plane where the mesh tire unit is located.

[0057] (3) Adopt the mist spraying method to carry out single-sided or double-sided spraying phenolic resin adhesive t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a preparation method of low-density carbon fiber hard insulation quilt. According to the preparation method, carbon fibers are chopped to 3-30 mm and carded into broken filaments by a carding machine, felts are prepared, 2-40 layers of felts are composited into one felt unit through needle-punching with a needle-punching method, and the needle-punching density is 2-50 needles / cm<2>; glue is sprayed to single surface or double surfaces of each felt unit with a mist spraying method, and felt units after glue spraying are stacked with felt units or protective films; the stacked material are subjected to hot pressing, carbonization and purification sequentially, a primary carbon fiber hard insulation quilt product is obtained, and a product required by a high-temperature furnace is produced through machining. The low-density carbon fiber hard insulation quilt prepared with the method comprises a plurality of felt unit layers which are bonded together; each felt unit layer comprises a plurality of felt layers which are connected together through needle punching. The preparation process is simple, and the prepared insulation quilt has the advantages of low density, good thermal insulation performance, low cost and wide application environment.

Description

technical field [0001] The invention relates to a thermal insulation material for high-temperature vacuum equipment, in particular to a low-density carbon fiber rigid thermal insulation felt and a preparation method thereof. Background technique [0002] As one of the industries that require many high-temperature furnaces, photovoltaic polysilicon ingot casting, due to the high depreciation rate of equipment and the impact of the downturn in foreign markets, product profits are low and domestic costs have increased. Cost reduction is one of the survival conditions of the photovoltaic industry. As one of the consumable parts, thermal insulation materials consume a huge amount every year, and their thermal insulation performance directly affects the performance of enterprises. [0003] At present, the high-temperature heat insulation materials in the market are compounded with impurity-containing soft felt, or mixed and stirred by injection molding. Such as CN101948327A, CN10...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): B32B5/02B32B9/00B32B5/06B32B37/12B32B37/10B32B37/06D04H1/46D04H1/4242
CPCB32B5/028B32B5/06B32B9/007B32B37/06B32B37/10B32B37/12B32B2250/20B32B2262/106B32B2305/20B32B2305/38B32B2307/302B32B2307/304B32B2309/022B32B2309/025B32B2309/125B32B2313/04B32B2571/00D04H1/4242D04H1/46
Inventor 郭建军郭建明杨艳文刘二良
Owner QINGDAO ADVANCED GRAPHITE MATERIALS CO LTD
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