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Carbon fiber surface defect repairing method

A carbon fiber and defect technology, applied in the field of carbon fiber manufacturing process improvement, can solve the problems of carbon fiber mechanical performance index decline, not very good, etc.

Inactive Publication Date: 2015-05-27
DALIAN WEIKANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The recovery of these surface holes has always been a matter of great concern in the field of carbon fiber production, but there is no good method so far, so at present, only the monofilament with existing holes can be sacrificed, resulting in a significant decline in the overall mechanical properties of carbon fibers

Method used

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  • Carbon fiber surface defect repairing method

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Embodiment Construction

[0008] as attached figure 1 As shown, the specific embodiment of the present invention mainly includes the following steps: the carbon fiber 7 that will be surface treated passes through the quartz tube reactor 5 and is arranged between the sending and receiving wire mechanisms 8, 9, and the carbon fiber 7 is heated by a strong focused electromagnetic field induction. To 1000-1300°C, at this time, the argon gas filled between the gas charging ports 5C and 5D ensures that external oxygen cannot enter the reactor 5, and 0.9-1.2 liters of acetylene gas per hour is directed against the carbon fiber at the gas charging port 5A. The moving direction enters the quartz reactor 5, and contacts with the carbon fiber at high temperature to generate a cracking reaction, and the free carbon atoms generated by the reaction are deposited on the surface and the cavity of the carbon fiber. The linear speed of the carbon fiber 7 in the quartz reactor is 2-3 m / min, which can effectively ensure t...

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Abstract

The invention discloses a carbon fiber surface defect repairing method, specifically a method for quality control of carbon fiber and graphitized carbon fiber. The method is an additional process of repairing surface cavity defects generated after processing of carbon fiber by a vapor deposition method. The method specifically comprises the following steps: after carbon fiber is heated by focused electromagnetic field induction, an acetylene reaction environment is produced to make acetylene to be cracked into hydrogen and carbon atom near high temperature carbon fiber; and carbon atom is deposited on the surface of carbon fiber, and especially cavities are repaired.

Description

technical field [0001] The invention belongs to the improvement technology of carbon fiber manufacturing process, in particular to a method for processing and repairing surface defects formed in the existing production process of carbon fiber. Background technique [0002] Carbon fiber (or graphite fiber) is processed and produced in the process of production, especially the carbon fiber processed and produced with polypropylene clear original silk as raw material. Due to the defects of the original filament itself and the uniformity of the processing process, the surface holes are formed. These holes cause the stress concentration phenomenon when the fiber is stressed, and are also the main factor for the breakage of the single filament. The recovery of these surface holes has always been a matter of great concern in the field of carbon fiber production, but there is no good method so far, so at present, only the monofilament with existing holes can be sacrificed, resulting...

Claims

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Application Information

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IPC IPC(8): D01F11/16D01F11/12
Inventor 鞠洪建
Owner DALIAN WEIKANG TECH
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