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Method for preparing carbon fiber powder

A carbon fiber powder and fiber powder technology are applied in the field of carbon fiber powder preparation, which can solve the problems of low production efficiency and high energy consumption, and achieve the effects of simple preparation process and reduced dust pollution.

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of high energy consumption and low production efficiency in the prior art, and a new carbon fiber powder preparation method is provided, which has the characteristics of low energy consumption and high production efficiency

Method used

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  • Method for preparing carbon fiber powder
  • Method for preparing carbon fiber powder
  • Method for preparing carbon fiber powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] On an intermeshing twin-screw extruder with a screw diameter of 27mm and an aspect ratio L / D=36:1 (Micro27 type from Leistritz, Germany), the temperature of the barrel is set at 220°C in ten sections from the feed port to the discharge port. °C, 230 °C, 240 °C, 250 °C, 255 °C, 260 °C, 260 °C, 260 °C, 250 °C, 240 °C, after the temperature reaches the set temperature and stabilizes, turn on the twin-screw main engine, so that the speed of the twin-screw is 180 rpm , add the dried SMA resin continuously from the feed port with a rate of 4.0kg / h with a loss-in-weight feeder, and the continuous carbon fiber (SIGRAFILC30) of 2 strands of 50K is opened from the middle part of the twin-screw extruder (the fifth section of the barrel) ) is introduced, and the extruded strip is water-cooled, air-dried, and pelletized to obtain a blended pellet of carbon fiber powder / SMA resin.

[0039] Weigh 10g of the above-mentioned blended pellets in a glass beaker and add 200ml butanone to diss...

Embodiment 2

[0041] On an intermeshing twin-screw extruder with a screw diameter of 27mm and an aspect ratio L / D=36:1 (Micro27 type from Leistritz, Germany), the temperature of the barrel is set at 220°C in ten sections from the feed port to the discharge port. °C, 230 °C, 240 °C, 250 °C, 255 °C, 265 °C, 270 °C, 270 °C, 265 °C, 260 °C, after the temperature reaches the set temperature and stabilizes, turn on the twin-screw main engine, so that the speed of the twin-screw is 170 rpm , add the dried PC resin continuously from the feeding port with a rate of 4.0kg / h with a loss-in-weight feeder, and the continuous carbon fiber (SIGRAFILC30) of 3 strands of 50K is opened from the middle of the twin-screw extruder (the fifth section of the barrel) ) is introduced, and the extruded strip is water-cooled, air-dried, and pelletized to obtain the blended pellets of carbon fiber powder / PC resin.

[0042] Weigh 10g of the above-mentioned blended pellets in a glass beaker and add 200ml of dichlorometh...

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Abstract

The present invention relates to a method for preparing carbon fiber powder, and mainly solves the problems of high energy consumption and low production efficiency in the prior art, the method for preparing carbon fiber powder comprises the steps: (1) a carbon fiber and said thermoplastic resin-containing mixture is obtained from continuous carbon fiber and thermoplastic resin in a molten state by shearing, grinding and mixing; (2) the thermoplastic resin in the mixture is dissolved by a good solvent for the thermoplastic resin; and (3) the carbon fiber powder is obtained by solid-liquid separation, by the technical scheme, the technical problems are solved, and the method can be used in industrial production of the carbon fiber powder.

Description

technical field [0001] The invention relates to a preparation method of carbon fiber powder. Background technique [0002] Carbon fiber powder is widely used because it is easy to mix with other materials, such as mixing with thermoplastic resin to prepare carbon fiber reinforced thermoplastic resin injection molding, and thermosetting resin (such as epoxy resin, cyanate resin, double horse resin, etc.), curing agent, etc. Mixing can prepare thermosetting molding materials and casting materials, and carbon fiber powder is also widely used in metal matrix carbon fiber composite materials and ceramic matrix carbon fiber composite materials. [0003] In the past, carbon fiber powder is usually prepared by decomposing and removing the sizing agent on the surface of carbon fiber at high temperature, and then cutting, pulverizing and grinding. For example, the Japanese patent JPH10273882A discloses a method for preparing carbon fiber powder using polyacrylonitrile-based carbon fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F9/145D01F9/16B29C47/92B29C48/92
Inventor 傅荣政姚斌王芳
Owner CHINA PETROLEUM & CHEM CORP
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