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A preparation method of hard carbon fiber insulation material made of carbon fiber balls

A technology of thermal insulation material and carbon fiber, applied in the field of preparation of hard carbon fiber thermal insulation material, can solve the problems of easy failure of the binder, low production efficiency, poor thermal insulation performance, etc. good effect

Inactive Publication Date: 2015-11-18
SICHUAN CHUANGYUE CARBON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems in the above-mentioned prior art that the process is complicated, the production efficiency is low, and the thermal insulation performance is poor. In the bonding, the binder is used more, resulting in a higher density. Easy failure, easy delamination and other shortcomings, provide a preparation method of hard carbon fiber insulation material made of carbon fiber balls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this embodiment, a method for preparing a hard carbon fiber insulation material made of carbon fiber balls comprises the following steps:

[0027] 1), fiber crushing and mixing: take 70 parts of chopped pitch-based carbon fibers with a length of 3 mm, 3 parts of phenolic resin powder, and 10 parts of polyvinyl alcohol fibers with a length of 3 mm, crush and mix them to obtain a mixture with a fiber length of 1 mm material;

[0028] 2), spheronization and granulation: After adding 10 parts of phenolic resin emulsion or solution with a concentration of 5% in the crushed mixture prepared in step 1), carry out spheronization and coating into balls with a disc granulator, and sieve, A carbon fiber ball with a diameter of 0.5mm and a density of 0.06g / cm3 was obtained;

[0029] 3), compression molding: place the carbon fiber balls prepared in step 2) in the mold of the molding die, make the fiber balls evenly distributed in the mold, heat to 80°C, and mold them under a pre...

Embodiment 2

[0037] In this embodiment, a method for preparing a hard carbon fiber insulation material made of carbon fiber balls comprises the following steps:

[0038] 1), fiber crushing and mixing: take 80 parts of chopped viscose-based carbon fiber with a length of 10 mm, 15 parts of epoxy resin powder, and 30 parts of polyvinyl alcohol fiber or viscose fiber with a length of 5 mm, crush and mix to obtain Mixture with a fiber length of 3mm;

[0039] 2), spheronization and granulation: after adding 20 parts of concentrations in the crushed mixture obtained in step 1) after adding 30% furfural resin emulsion or solution, carry out spheronization and coating into balls with a disc granulator, and sieve, The obtained diameter is 10mm, and the density is the carbon fiber ball of 0.20g / cm3;

[0040] 3), compression molding: place the carbon fiber balls prepared in step 2) in the mold of the molding die, make the fiber balls evenly distributed in the mold, heat to 200°C, and mold them under ...

Embodiment 3

[0048] In this embodiment, a method for preparing a hard carbon fiber insulation material made of carbon fiber balls comprises the following steps:

[0049]1), fiber crushing and mixing: take 75 parts of chopped polyacrylonitrile-based carbon fibers with a length of 7 mm, 10 parts of phenolic resin powder, epoxy resin powder, urea-formaldehyde resin powder, and asphalt powder, and 20 parts of polyacrylonitrile-based carbon fibers with a length of 4 mm. Vinyl alcohol fibers, crushed and mixed to obtain a mixture with a fiber length of 2mm;

[0050] 2), spheronization and granulation: in step 1) add 15 parts of concentrations to be 20% phenolic resin emulsion or solution, furfural resin emulsion or solution, epoxy resin emulsion or solution, polyvinyl alcohol aqueous solution, After the mixed solution of the polyacrylamide aqueous solution, carry out spheronizing and wrapping into ball with disc granulator, and sieve, make diameter is 6mm, and density is the carbon fiber ball of...

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Abstract

The invention discloses a preparation method of a hard carbon fiber heat preservation material prepared from carbon fiber balls, and belongs to the technical field of hard carbon fiber heat preservation materials. The hard carbon fiber heat preservation material is prepared by virtue of fiber crushing and mixing, rolling and pelletizing, mold pressing and forming, drying and curing, adhesive layer reinforcement, carbonization treatment, cutting and polishing, surface treatment and high-temperature graphitization. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the preparation method is simple in process, low in cost of prepared felt, good in heat preservation effect and uniform in fiber distribution of the felt, does not have the phenomenon of non-uniform felt fiber distribution caused by fiber agglomerates generated in the forming process using short cutting shreds, and can be used for well using waste materials of carbon fibers and the felt.

Description

technical field [0001] The invention belongs to the technical field of hard carbon fiber thermal insulation materials, and in particular relates to a preparation method of a hard carbon fiber thermal insulation material made of carbon fiber balls. [0002] It is used in high-temperature furnace equipment such as cemented carbide sintering furnace, single crystal silicon furnace, vacuum smelting furnace, vacuum heat treatment furnace, and vapor deposition furnace. Background technique [0003] Carbon fiber rigid thermal insulation felt is a carbon / carbon composite material made by a special process. It has low density, high carbon content, and good thermal insulation effect, which has a positive effect on energy saving and emission reduction. It can be used in a vacuum or inert atmosphere. Around 2000℃, it is widely used in the surface insulation of aerospace materials, metallurgy, high temperature gas, etc. With the advancement of science and technology in our country, its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 方进伍孝
Owner SICHUAN CHUANGYUE CARBON MATERIAL