A kind of carbon fiber surface treatment method for reinforcing thermoplastic resin

A technology for strengthening thermoplastics and thermoplastic resins. It is used in fiber processing, carbon fiber, textiles and papermaking. It can solve the problems of weakening the strength of carbon fibers and achieve the effect of easy dispersion.

Active Publication Date: 2021-11-23
湖州艾历克工业材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, high temperature oxidation will also weaken the strength of carbon fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, a carbon fiber surface treatment method for reinforcing polyamide, comprising the following steps: the carbon fiber raw material is T300 / 24k commercial grade, which is coated with a thermosetting sizing agent a, and the thermosetting sizing agent a is bisphenol Type A epoxy sizing agent; carbon fiber bundles pass through the heating tunnel, and CO is introduced into the heating tunnel 2 The gas is protected, the heating tunnel is a tunnel furnace, and the outside of the tunnel furnace is heated by an intermediate frequency induction coil. The heating time is 6 minutes. 450°C; after the cured carbon fiber bundle comes out of the heating tunnel, it is bent by rollers and spreads out into monofilaments; then it passes through the dipping tank equipped with sizing agent b, and the sizing agent b in the dipping tank is a solution of thermoplastic resin. The ratio is alcohol-soluble nylon:ethanol:water=0.01:0.6:1; the soaked carbon fiber further passes through a...

Embodiment 2

[0031] Embodiment 2, a carbon fiber surface treatment method for reinforcing polypropylene, includes the following steps: the carbon fiber raw material is T300 / 24k commercial grade, coated with bisphenol A epoxy sizing agent. The carbon fiber bundle is passed through the heating tunnel, and CO is introduced into the heating tunnel 2 The gas is protected, and the medium frequency induction heating is used outside the heating tunnel. The heating time is 6 minutes, so that the surface temperature of the carbon fiber reaches 450°C. After leaving the tunnel, it enters the dipping tank through rollers; the sizing agent b in the dipping tank is a terpene-phenol emulsion, in which the terpene phenol is a particle with a diameter of about 1 micron, and the solid content of the emulsion is 5%; the wetted carbon fiber Further pass through a drying tunnel with a row of rollers at a drying temperature of 110°C; the dried carbon fiber bundles are cooled and cut into pellets to obtain carbon...

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Abstract

The invention relates to a carbon fiber surface treatment method for reinforcing thermoplastic resin. Under the protection of protective gas, the carbon fiber bundle coated with thermosetting sizing agent a is induced to heat and solidify the original sizing agent layer; the cured carbon fiber The bundles are bent by rollers and spread out into monofilaments; then they pass through the impregnation tank equipped with sizing agent b, which is a solution or emulsion of thermoplastic resin; the impregnated carbon fibers are dried in a drying oven to obtain processed reinforcement The carbon fiber bundle for thermoplastic resin, the carbon fiber bundle for reinforcing thermoplastic resin contains 2.5-20% of the above-mentioned thermoplastic resin; finally, the obtained carbon fiber bundle for reinforcing thermoplastic resin is wound up or directly cut into pellets. The carbon fiber processed by the method can form an ideal bonding interface with the thermoplastic resin, and the fiber is easy to disperse, so the reinforcing effect of the carbon fiber in the thermoplastic can be fully exerted, and has high application value in the field of thermoplastic reinforced plastic.

Description

technical field [0001] The invention relates to the field of thermoplastic composite material processing, more specifically to a carbon fiber surface treatment method for reinforcing thermoplastic resins, and to a method for converting the sizing agent on the surface of ordinary carbon fibers to make it suitable for thermoplastic resin matrix. Background technique [0002] Carbon fiber is a fiber material with a carbon content of more than 90%, and the main component exists in the form of layered graphite crystals. Carbon fibers with a higher degree of graphitization are sometimes called graphite fibers. Commercial carbon fiber is obtained by high-temperature carbonization of polyacrylonitrile, pitch and other raw materials under the protection of protective gas. Carbon fiber can withstand high temperatures above 900°C, but because its main component is carbon, it can burn. [0003] Carbon fiber is a high-end reinforcement material with high tensile strength and modulus. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M15/227C08J5/06C08L77/00C08K9/04C08K7/06C08L23/12B29C35/02D06M101/40
CPCB29C35/02B29C2035/0211C08J5/06C08J2323/12C08J2377/00C08K7/06C08K9/08D06M15/227D06M15/55D06M2101/40
Inventor 费峡
Owner 湖州艾历克工业材料有限公司
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