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Pre-oxidized fiber/carbon fiber structure preform and preparation method thereof

A technology of carbon fiber and pre-oxygenated yarn, which is applied in the direction of textiles and papermaking, layered products, non-woven fabrics, etc. It can solve the problems of poor performance uniformity and long fiber retention rate of chopped carbon fiber mesh tires, dust pollution in the processing environment, and difficulty in carding technology Advanced problems, to reduce the possibility of brittle fracture damage, reduce dust pollution, and reduce production costs

Pending Publication Date: 2022-07-29
XIAN AVIATION BRAKE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention: the embodiment of the present invention provides a pre-oxidized silk / carbon fiber structure prefabricated body and its preparation method, to solve the brittle characteristics of the existing carbon fiber integral needle-punched prefabricated body due to the small elongation at break, thus bringing The new carding technology is more difficult, the performance uniformity and long fiber retention rate of the prepared chopped carbon fiber net tire are poor, and the net tire will generate a lot of fine carbon fiber dust during carding, resulting in large dust pollution in the processing environment and damage worker health issues

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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  • Pre-oxidized fiber/carbon fiber structure preform and preparation method thereof

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preparation example Construction

[0065] The second part: the embodiment of the present invention also provides a preparation method of a pre-oxygenated filament / carbon fiber structure preform, and the preparation method is used for preparing the pre-oxygenated filament / carbon fiber structure preform provided in the above-mentioned first part. figure 1 The flow chart of the preparation method of the pre-oxygen filament / carbon fiber structure preform provided by the embodiment of the present invention, such as figure 1 As shown, the preparation method of the pre-oxygen filament / carbon fiber structure preform provided in the embodiment of the present invention may include the following steps:

[0066] Step 1, prepare continuous long carbon fiber cloth.

[0067] Continuous long carbon fiber cloth includes structure types such as long carbon fiber non-weft cloth, long carbon fiber plain cloth and long carbon fiber satin cloth. In this step 1, the continuous long carbon fibers in the prepared continuous long carbo...

Embodiment 1

[0093] This embodiment specifically provides a preparation process of a pre-oxygenated filament / carbon fiber flat plate preform containing a structure of ordinary long carbon fiber non-woven fabric-interlayer composite chopped fiber mesh tire layer (hereinafter referred to as: composite fiber unit layer A) structure.

[0094] In this embodiment, the pre-oxygen filament / carbon fiber structure preform contains ordinary long carbon fiber non-woven fabric and interlayer composite chopped fiber mesh, wherein the ordinary long carbon fiber non-woven fabric adopts 3K long carbon fiber. The mesh made of chopped carbon fibers and the mesh made of chopped pre-oxidized silk fibers are superimposed and needle punched to form an interlayer composite chopped fiber mesh.

[0095] The specific process of this embodiment includes the following steps:

[0096] Step 1, prepare ordinary long carbon fiber weft-free cloth.

[0097] 3K ordinary continuous long carbon fibers are used to prepare ordi...

Embodiment 2

[0105] This embodiment specifically provides a preparation process of a pre-oxygenated filament / carbon fiber cylindrical preform having a structure of ordinary long carbon fiber plain weave-interlayer composite chopped fiber mesh unit layer (hereinafter referred to as: composite fiber unit layer B) structure.

[0106] In this embodiment, the pre-oxygen wire / carbon fiber cylinder preform contains ordinary long carbon fiber plain weave and interlayer composite chopped fiber mesh, wherein the ordinary long carbon fiber plain weave adopts 6K long carbon fiber. The mesh made of chopped carbon fibers and the mesh made of chopped pre-oxidized silk fibers are superimposed and needle punched to form an interlayer composite chopped fiber mesh.

[0107] The specific process of this embodiment includes the following steps:

[0108] Step 1, prepare ordinary long carbon fiber plain weave.

[0109] 6K ordinary continuous long carbon fiber is used to prepare ordinary long carbon fiber plain ...

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Abstract

The invention discloses a pre-oxidized fiber / carbon fiber structure preform and a preparation method thereof. The preparation method comprises the following steps: preparing continuous long carbon fiber cloth and a composite chopped fiber web; needling a layer of continuous long carbon fiber cloth and a layer of composite chopped carbon fiber net tire to prepare multiple types of composite fiber unit layers; and needling the composite fiber unit layers layer by layer or in a group by multiple layers in a crossed lamination manner, and repeating until the thickness requirement of the pre-oxidized fiber / carbon fiber structure preform is met. According to the technical scheme, the problems that the carding technology difficulty is high due to the brittleness characteristic caused by the small elongation at break of an existing carbon fiber overall needled preform, the prepared short carbon fiber net tire is poor in performance uniformity and long fiber retention rate, large fine carbon fiber dust can be generated when the net tire is carded, and the service life of the net tire is prolonged are solved. The dust pollution of the processing environment is serious, and the health of workers is damaged.

Description

technical field [0001] The present invention relates to, but is not limited to, the technical field of carbon fiber composite materials, in particular to a pre-oxygen wire / carbon fiber structure preform and a preparation method thereof. Background technique [0002] Carbon fiber monolithic needle-punched preform is a type of preform structure widely used in carbon / carbon or carbon / ceramic composite materials. Weaving preforms have the disadvantages of complicated process and high cost. [0003] However, the carbon fiber integral needle-punched preform also faces more and more problems in the process of use, and it is urgent to improve through the improvement of structure and process. The above-mentioned carbon fiber monolithic needle-punched preforms mainly have the following problems: First, due to the small elongation at break of carbon fibers, the mesh structure in the carbon fiber monolithic acupuncture preforms is likely to cause brittle fracture damage during the card...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B5/06D04H1/4242D04H1/4374D04H1/46
CPCB32B5/022B32B5/26B32B5/06D04H1/4242D04H1/4374D04H1/46B32B2262/106
Inventor 强琪张伟滨施伟伟郭庆山李明
Owner XIAN AVIATION BRAKE TECH
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