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High-density carbon fiber needled felt and preparation method thereof

A technology of carbon fiber and needle-punched felt, applied in the field of needle-punched felt, which can solve the problems of difficult preparation, easily damaged needles, and difficulty in forming high-quality high-density carbon fiber needle-punched preforms, and achieve excellent mechanical properties and sliding resistance The effect of increase and decrease in thickness

Active Publication Date: 2020-02-04
JIANGSU TIANNIAO HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the bulk density of the carbon fiber needle-punched preform is greater than 0.6g / cm 3 However, the preparation is difficult, the needles are easily damaged, and it is difficult to form high-quality high-density carbon fiber needle-punched preforms.

Method used

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  • High-density carbon fiber needled felt and preparation method thereof
  • High-density carbon fiber needled felt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-density carbon fiber needle-punched preform (needle felt), the volume density of the carbon fiber needle-punched preform is 0.8g / cm 3 , the thickness is 4mm. The acupuncture prefabricated body is composed of 10 structural units, and each structural unit is composed of 1 layer of carbon fiber mesh and 1 layer of carbon fiber spread cloth, wherein the surface density of the carbon fiber mesh is 80g / m 2 , the surface density of the carbon fiber spread cloth is 240g / m 2 .

[0030] Prepare the carbon fiber preform as follows:

[0031] (1) prepare carbon fiber widening yarn;

[0032] After the 18K carbon fiber passes through the constant temperature zone with a temperature of 80°C at a speed of 20 m / min, it passes through the compressed air injection zone and the vacuum adsorption zone in turn to form a 10mm widened carbon fiber belt, and then spray resin to shape it. The compressed air injection speed is 10m / s, and the distance between the carbon fiber and the inj...

Embodiment 2

[0038] A high-density carbon fiber needle-punched preform (needle felt), the volume density of the carbon fiber needle-punched preform is 0.6g / cm 3 , the thickness is 20mm. The needle-punched prefabricated body is composed of 30 structural units, and each structural unit is composed of 2 layers of carbon fiber mesh tires and 2 layers of carbon fiber widened unidirectional fabrics. The area density of the carbon fiber mesh tires is 40g / m 2 , the surface density of the carbon fiber spread cloth is 60g / m 2 .

[0039] Prepare the carbon fiber preform as follows:

[0040] (1) prepare carbon fiber widening yarn;

[0041] After the 3K carbon fiber passes through the constant temperature zone with a temperature of 110°C at a speed of 15 m / min, it passes through the compressed air injection zone and the vacuum adsorption zone in turn to form a 10mm widened carbon fiber belt, and then sprays resin to shape it. The compressed air injection speed is 15m / s, and the distance between the...

Embodiment 3

[0047]A high-density carbon fiber needle-punched preform (needle felt), the volume density of the carbon fiber needle-punched preform is 0.8g / cm 3 , the thickness is 6mm. The acupuncture prefabricated body is composed of 8 structural units, and each structural unit is composed of 2 layers of carbon fiber mesh tires and 2 layers of carbon fiber expanded cloth, wherein the area density of the carbon fiber mesh tires is 100g / m 2 , the surface density of the carbon fiber spread cloth is 200g / m 2 .

[0048] Prepare the carbon fiber preform as follows:

[0049] (1) prepare carbon fiber widening yarn;

[0050] After the 24K carbon fiber passes through the constant temperature zone with a temperature of 80°C at a speed of 8 m / min, it passes through the compressed air injection zone and the vacuum adsorption zone in turn to form a 20mm widened carbon fiber belt, and then sprays resin to shape it. The compressed air injection speed is 25m / s, and the distance between the carbon fiber...

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Abstract

The invention discloses a high-density carbon fiber needled felt, which is formed by stacking and needling structural units, each comprising a carbon fiber mesh base and a carbon fiber stretch fabric.The carbon fiber fabric prepared with stretch fibers replaces common carbon fiber fabric, the thickness of the carbon fiber fabric is reduced, the rebound in the needling process caused by gaps amongthe carbon fibers is reduced, and therefore, the overall density and mechanical strength of the carbon fiber needled felt are improved. In addition, the service life of a felting needle for the high-density carbon fiber needled felt can be extended.

Description

technical field [0001] The invention relates to the technical field of needle felt, in particular to a high-density carbon fiber needle felt used for carbon / carbon composite materials and carbon / ceramic composite materials. Background technique [0002] Carbon fiber is widely used in aerospace, transportation and other fields due to its high strength, high modulus, excellent thermal properties and oxidation resistance. Carbon fiber prefabricated body (needle felt) is a preformed part in which carbon fiber is laid into a textile structure by textile technology, and it is the skeleton of composite materials such as carbon / carbon composite materials and carbon / ceramic composite materials. There are many types of prefabricated structures. Among them, the needle-punched carbon fiber prefabricated body has the advantages of strong structural design, uniform distribution of voids, and easy compact molding. , high cost and other shortcomings, it has become a multi-purpose, high-tec...

Claims

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Application Information

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IPC IPC(8): D04H1/4242D04H1/4374D04H1/46D02G3/22D02G3/16D03D15/00
CPCD02G3/16D02G3/22D03D15/00D04H1/4242D04H1/4374D04H1/46D10B2101/12D10B2321/021D10B2321/022D10B2331/04D10B2401/06D03D15/247
Inventor 缪云良
Owner JIANGSU TIANNIAO HIGH TECH
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