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Method for manufacturing viscose-based graphite felt

A production method and technology of graphite felt, which can be used in heating/cooling fabrics, textiles and papermaking, fiber processing, etc., can solve the problems of low tenacity rate, broken wire rate, etc., poor production equipment technology, and loss of insulation layer Effect and other issues, to achieve the effect of low broken wire rate, excellent electrical performance, and avoid being broken

Inactive Publication Date: 2011-04-27
GANSU HAOSHI CARBON FIBER
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AI Technical Summary

Problems solved by technology

[0002] The existing viscose-based felt is made of pulp viscose-based fiber filaments, which have low tensile strength, low tenacity rate, and low yarn-breaking rate.
In the process of processing, the moisture from the felt body itself causes the felt body to oxidize, and the production equipment technology is not up to the standard. It can only be processed to 950°C and cannot be processed to 2200°C. Therefore, when it is used at 1500°C-2200°C, the ash content of the felt body Larger, the purity is not high, and at the same time the felt body shrinks greatly, it is easy to make the insulation layer lose its effect

Method used

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  • Method for manufacturing viscose-based graphite felt
  • Method for manufacturing viscose-based graphite felt
  • Method for manufacturing viscose-based graphite felt

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Embodiment Construction

[0019] Below, in conjunction with accompanying drawing, the present invention will be further described:

[0020] A method for making viscose-based graphite felt, the steps of which are

[0021] a. Select wood pulp plant viscose fiber with high tensile strength, low broken wire rate and good toughness as raw material, preheat it from room temperature to 80°C, stir evenly, pour the fiber into diammonium hydrogen phosphate according to the weight of 22 % ratio and in the water phase mixed solution, the ratio of diammonium hydrogen phosphate and water is 22:100 (weight). Take it out after soaking for 1 hour, so that the surface of the wood pulp plant viscose fiber absorbs the solution, so that the fiber tends to be stable; then dry it in an oven at 60°C, take it out, and needle it into a felt body on a needle loom;

[0022] b. The needle felt body imported from abroad is used to make it difficult to break the fiber during the needle punching process, reduce the fiber breakage ra...

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Abstract

The invention relates to a process for manufacturing viscose-based graphite felt. The process comprises the following steps of: selecting wood pulp plant viscose-based fibers as a raw material; needling into a felt body by a domestic novel needle machine; and performing preoxidation treatment, special carbonizing treatment and special graphitizing treatment. The viscose-based graphite felt has the characteristics of extremely high tensile strength, high toughness and porosity, low thread break rate, thread yield of between 30 and 33 percent, high purity, stable performance, superior electrical property and the like. The treatment temperature of the viscose-based graphite felt reaches 2,200 DEG C.

Description

technical field [0001] The invention relates to a production method of viscose-based graphite felt. Background technique [0002] What existing viscose-based felt selects is pulp viscose-based fiber filament, and its tensile strength is low, and the collection rate such as tenacity rate, broken filament rate is low. In the process of processing, the moisture from the felt body itself causes the felt body to oxidize, and the production equipment technology is not up to the standard. It can only be processed to 950°C and cannot be processed to 2200°C. Therefore, when it is used at 1500°C-2200°C, the ash content of the felt body Larger, the purity is not high, and at the same time the felt body shrinks greatly, it is easy to make the insulation layer lose its effect. Contents of the invention [0003] In order to overcome the deficiencies of existing viscose base felt, the object of the invention provides a kind of manufacture method of viscose base graphite felt, [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/46D06C7/00D06C7/04D06M11/69D06M101/06
Inventor 郝相忠郝相国周志强陈超
Owner GANSU HAOSHI CARBON FIBER
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