Quasi-three dimensional prefabricated member

A prefabricated, quasi-three-dimensional technology, applied in the direction of textiles, papermaking, non-woven fabrics, etc., to achieve the effect of improving carbon residue, good structure distribution performance, and reducing carbonization process links

Inactive Publication Date: 2014-06-04
YIXING YITAI CARBON FIBER WEAVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main drawbacks of this technology are similar to those of carbon fiber continuous long fiber weaving technology

Method used

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  • Quasi-three dimensional prefabricated member
  • Quasi-three dimensional prefabricated member
  • Quasi-three dimensional prefabricated member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Cut polyacrylonitrile-based long carbon fibers into polyacrylonitrile-based chopped carbon fibers with a length of 60mm, spray water to keep the chopped carbon fibers at 40% humidity, and keep the temperature at 25°C for 5 hours to soften and modify them, and take out the chopped carbon fibers After the fibers are formed along the direction of the roller axis of the single-roller opening machine, an "S"-shaped needle arrangement is formed, and the flocculent fiber fleece is opened with a 90% looseness, and then combed by a carding machine into a thickness of 0.3mm and an area density of 200g / m 2 Thin mesh felt fabric (net tire). The polyacrylonitrile-based long carbon fiber is radially laminated and needle-punched to a thickness of 0.3mm and a surface density of 250g / m 2 thin layer laid fabric. Such as figure 1 As shown, the latitude-free fabrics and mesh tires are alternately laminated, and the adjacent latitude-free fabric layers are interlaced at an angle of 0° / 90°...

Embodiment 2

[0039] Cut polyacrylonitrile-based long carbon fibers into polyacrylonitrile-based chopped carbon fibers with a length of 70 mm, spray the surface with octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, and place them in an airtight container for 20 hours. It is softened and modified, taken out, dehydrated and dried at room temperature, chopped fibers along the direction of the roller axis of the single-roller opener, forming an "S"-shaped needle arrangement, and loosened to 90% flocculent fiber fleece, and then It is combed by a carding machine to a thickness of 0.15mm and a surface density of 80g / m 2 Thin mesh felt fabric (net tire). The polyacrylonitrile-based long carbon fiber is oriented and laminated to a thickness of 0.15mm and an area density of 100g / m 2 thin layer laid fabric. Such as figure 1 As shown, the latitude-free fabrics and mesh tires are alternately laminated, and the adjacent latitude-free fabric layers are interlaced at an angle of 0° / 90°, and...

Embodiment 3

[0041] Cut polyacrylonitrile-based long carbon fibers into polyacrylonitrile-based chopped carbon fibers with a length of 80mm, spray water to keep the chopped carbon fibers at 70% humidity, and keep the temperature at 25°C for 3 hours to soften and modify them. After fiber cutting, along the direction of the roller axis of the single-roller opening machine, an "S"-shaped needle layout is formed, and the flocculent fiber fleece is opened to 90% looseness, and then combed by a carding machine into a thickness of 0.2mm and an area density of 125g / m 2 Thin mesh felt fabric (net tire). The polyacrylonitrile-based long carbon fiber is oriented and laminated to a thickness of 0.25mm and a surface density of 200g / m 2 thin layer laid fabric. Such as figure 1 As shown, the latitude-free fabrics and mesh tires are alternately laminated, and the adjacent latitude-free fabric layers are interlaced at an angle of 0° / 90°, and the outermost two layers are all latitude fabrics. According ...

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Abstract

The invention discloses a quasi-three dimensional prefabricated member. The quasi-three dimensional prefabricated member comprises a non-weft fabric and a net tire alternative laminate, wherein continuous needling permeation is conducted on a plurality of fixed layers of the non-weft fabric and the net tire alternative laminate through a bidirectional feeding needle machine in the vertical direction, the adjacent layers are connected through vertical fibers generated between the layers, the quasi-three dimensional prefabricated member of a carbon fiber whole structure is obtained, and the volume density of the quasi-three dimensional prefabricated member ranges from 0.45 g / cm<3> to 0.70 g / cm<3>. The quasi-three dimensional prefabricated member reduces the number of carbonization technologies and avoids deformation caused by contraction of long and short fibers and coking caused by uneven density in a carbonization process; the internal structure and hole distribution of the quasi-three dimensional prefabricated member are optimized; base carbon is easily adsorbed and borne in a CVD process, and friction and abrasion resistant performance, and heat conducting performance, tensile strength and shearing strength in the vertical direction of a carbon brake disc of an airplane are greatly enhanced. The Z-direction longitudinal reinforced fiber content of the quasi-three dimensional prefabricated member is improved, and consistency of density among the layers is controlled effectively.

Description

technical field [0001] The invention provides a quasi-three-dimensional prefabricated part, especially a quasi-three-dimensional prefabricated part with a carbon fiber integral structure, which is especially suitable for subsequent direct deposition of carbon and processing into C / C structural materials for aircraft carbon brake discs. Background technique [0002] Aircraft carbon brake is a circular ultra-high-strength friction material. Britain, the United States, and France began to develop aircraft carbon brake materials as early as the mid-1960s, and continuously improved the performance of the enhanced material and the production process. And improve, until the early eighties of the 20th century, only American B.F.Goodrich Company, Goodyer Company, Honeywell Company, British Dunlop Company and French Messier-Bugatti Company provided aircraft carbon brake discs for Boeing and Airbus. The prefabrication technology of aircraft carbon brake discs mainly includes pre-oxidiz...

Claims

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4242D04H1/46
Inventor 蒋洪亮谢美琴
Owner YIXING YITAI CARBON FIBER WEAVING
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