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A method for preparing carbon fiber insulation felt from short fibers

A short fiber and carbon fiber technology, applied in the field of carbon fiber thermal insulation material preparation, can solve the problems of uneven density of carbon fiber composite materials, high resin content, easy surface cracking, etc., to solve safety and environmental protection problems, improve the overall utilization rate, and increase enterprise benefits Effect

Active Publication Date: 2021-08-20
江苏米格新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the density of carbon fiber composite materials is uneven, the surface flatness is poor, the central stress is poor, and the surface is easy to crack;
[0006] The patent No. CN106336236A mentions a method for preparing carbon fiber insulation materials by short fiber wet molding. The surface flatness of carbon fiber composite materials prepared by this method is relatively poor, and the bottom surface of the prefabricated embryo body will be damaged due to the effect of stress on the mixed fiber and resin. Depositing a large amount of resin leads to carbonization and graphitization stage. Because the resin content is too high, the stress release is not timely and causes surface cracking

Method used

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  • A method for preparing carbon fiber insulation felt from short fibers
  • A method for preparing carbon fiber insulation felt from short fibers
  • A method for preparing carbon fiber insulation felt from short fibers

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Effect test

Embodiment 1

[0038] A method for preparing carbon fiber insulation felt from short fibers, comprising the following steps:

[0039] 1. Vacuum forming: put 10kg of short fibers with a length of 3mm into the mold, and form them under the condition of a vacuum of 3000pa to obtain a prefabricated embryo body;

[0040] 2. Airflow carding: open the airflow carding device to adjust the airflow carding angle to 15° and the airflow velocity to 0.8m / s; comb the surface of the prefabricated embryo body to obtain a prefabricated embryo body with a smooth surface;

[0041] 3. Resin dilution and atomization: dilute to obtain diluted resin, and spray the atomized resin on the top of the prefabricated embryo body;

[0042] 4. Vacuum suction: atomized resin infiltrates the prefabricated embryo body under the action of vacuum;

[0043] 5. Surface treatment: After the upper and lower surfaces of the prefabricated embryo body are treated, a high-temperature cloth is pasted, and the molding is put into an ove...

Embodiment 2

[0049] A method for preparing carbon fiber insulation felt from short fibers, comprising the following steps:

[0050] 1. Vacuum forming: put 11kg of short fibers with a length of 4mm into the mold, and form them under the condition of a vacuum of 2000pa to obtain a prefabricated embryo body;

[0051] 2. Airflow carding: open the airflow carding device to adjust the airflow carding angle to 20° and the airflow velocity to 0.8m / s; comb the surface of the prefabricated embryo body to obtain a prefabricated embryo body with a smooth surface;

[0052] 3. Resin dilution and atomization: dilute to obtain diluted resin, and spray the atomized resin on the top of the prefabricated embryo body;

[0053] 4. Vacuum suction: atomized resin infiltrates the prefabricated embryo body under the action of vacuum;

[0054] 5. Surface treatment: After the upper and lower surfaces of the prefabricated embryo body are treated, a high-temperature cloth is pasted, and the molding is put into an ove...

Embodiment 3

[0060] A method for preparing carbon fiber insulation felt from short fibers, comprising the following steps:

[0061] 1. Vacuum forming: put 13kg of short fibers with a length of 5mm into the mold, and form them under the condition of a vacuum of 5000pa to obtain a prefabricated embryo body;

[0062] 2. Airflow carding: open the airflow carding device to adjust the airflow carding angle to 30° and the airflow velocity to 1.1m / s; comb the surface of the prefabricated embryo body to obtain a prefabricated embryo body with a smooth surface;

[0063] 3. Resin dilution and atomization: dilute to obtain diluted resin, and spray the atomized resin on the top of the prefabricated embryo body;

[0064] 4. Vacuum suction: atomized resin infiltrates the prefabricated embryo body under the action of vacuum;

[0065] 5. Surface treatment: After the upper and lower surfaces of the prefabricated embryo body are treated, a high-temperature cloth is pasted, and the molding is put into an ove...

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Abstract

The invention relates to a method for preparing carbon fiber thermal insulation felt from short fibers. The method of preparing carbon fiber thermal insulation felt from short fibers is to obtain a prefabricated embryo body through pretreatment, and to obtain a solidified embryo body after infiltration with atomized resin, curing and molding, carbonization and graphitization Finally, carbon fiber insulation materials are obtained; this process can not only recycle the scraps produced by cutting carbon fiber soft felt, but also greatly improve the utilization rate of resin by atomization process, which is safe and environmentally friendly. The density is controllable and the heat preservation effect is good, so it is worth vigorously promoting.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber thermal insulation material preparation, and in particular relates to a method for preparing carbon fiber thermal insulation felt from short fibers. Background technique [0002] Carbon fiber insulation material has extremely high temperature resistance and corrosion resistance under inert gas or vacuum; at the same time, it does not contain other impurity atoms after high temperature graphitization treatment, and has high purity. With the development of the photovoltaic industry, the large-scale expansion of single crystal furnaces and polycrystalline ingot furnaces has greatly increased the urgent demand for carbon fiber insulation materials. use. The carbon fiber insulation material not only plays the role of skeleton support in the high-temperature furnace body, but also has excellent heat insulation effect, which greatly reduces energy consumption; [0003] At present, there are mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/83C04B38/00
CPCC04B35/66C04B35/83C04B38/0038C04B2235/48C04B2235/5248C04B2235/602C04B2235/606C04B2235/616C04B2235/656C04B2235/6567C04B2235/658C04B2235/6581C04B2235/77C04B2235/9607
Inventor 谭海仁陈新华
Owner 江苏米格新材料股份有限公司
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