Carbon fiber composite material product and preparation method thereof

A composite material and carbon fiber technology, applied in the field of composite materials, can solve problems such as poor surface gloss of composite materials, achieve good apparent quality, reduce surface tension gradient, and improve surface gloss

Active Publication Date: 2014-01-08
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of poor surface gloss of composite materials in the prior art, the embodiment of the present invention provides a carbon fiber composite product and its preparation method

Method used

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  • Carbon fiber composite material product and preparation method thereof

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Effect test

Embodiment 1

[0028] as attached figure 1 As shown, the embodiment of the present invention provides a high-gloss surface RTM molding foam sandwich carbon fiber reinforced resin composite product, and the high gloss surface RTM molding foam sandwich carbon fiber reinforced resin composite product includes the following components in volume fraction: 30% - 60% carbon fiber reinforcement, 5%-15% foam core and 35%-65% epoxy resin system including epoxy resin curing system and leveling agent. Specifically, preferably, the carbon fiber reinforcement is at least one of carbon fiber plain weave fabric, carbon fiber twill weave fabric, carbon fiber satin weave fabric, carbon fiber unidirectional fabric, carbon fiber multiaxial warp knitted fabric, and the foam core material is polyurethane At least one of foam material, polyvinyl chloride foam material and polymethacrylimide foam material.

[0029] Due to its high strength, high thermal shock resistance, low specific gravity, heat resistance and c...

Embodiment 2

[0039] as attached figure 1 As shown, the embodiment of the present invention provides a method for preparing a carbon fiber composite product, specifically as follows:

[0040] First, clean the RTM mold of auto parts products and spray the release agent, then lay the carbon fiber reinforcement and foam core material in the mold according to the set layer sequence, close the mold, and pre-heat at a certain temperature. Heat for a period of time (the preheating temperature and time are determined by the specific epoxy resin system) and then heat up the RTM mold with carbon fiber reinforcement and foam core material, and put a certain proportion of epoxy resin, curing agent and fluid The leveling agent is injected into the mold, wherein the pressure of the injection muzzle is kept below 2bar, and the final foam sandwich carbon fiber reinforced resin composite auto parts product is obtained after the above epoxy resin system is cured.

[0041] The volume proportions of the carbo...

Embodiment 3

[0056] as attached figure 1 As shown, the embodiment of the present invention provides a carbon fiber composite material product and its preparation method, specifically as follows:

[0057] Step 1: Clean the RTM mold of auto parts with ethanol. After the ethanol on the surface of the mold is completely volatilized, apply the release agent evenly on the surface of the cleaned RTM mold, leave it for 10 minutes, and repeatedly apply the release agent 3 times;

[0058] Step 2: Cut the dried carbon fiber plain weave fabric and polyurethane foam material according to the surface size of the RTM mold, and place the carbon fiber plain weave fabric with a volume ratio of 30%, 15% polyurethane foam material and carbon fiber plain weave fabric in sequence On the surface of the RTM mold, preheat at a set preheating temperature of 50°C for 5 minutes after mold closing, wherein the number of layers of the carbon fiber reinforced body is 5 layers;

[0059] Step 3: Prepare bisphenol A epoxy...

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Abstract

The invention discloses a carbon fiber composite material product and a preparation method thereof, belonging to the field of composite materials. The preparation method comprises the step of reasonably mixing 30%-60% of a carbon fiber reinforcement, 5%-15% of a foam core material and 35%-65% of an epoxy resin system, wherein the epoxy resin system comprises an epoxy resin curing system and a leveling agent, so that the surface tension of a composite material is regulated, the surface tension gradient is reduced, and bulges, recesses, flow lines or fine holes and other defects on the surface of the product, which are caused by different tensions, are improved; the foam core sandwich carbon fiber resin reinforcement composite material product is prepared through an RTM (resin transfer molding) molding process, the surface gloss is significantly improved, and the high gloss surface with good apparent quality is achieved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a carbon fiber composite material product and a preparation method thereof. Background technique [0002] Due to its high strength, low specific gravity, heat resistance and corrosion resistance, carbon fiber reinforced resin composite materials have more and more applications in the automotive field. Using RTM (Resin Transfer Molding resin transfer molding) technology to cure carbon fiber reinforced resin composite materials to make various auto parts, not only can improve the comprehensive performance index of the car, but more importantly, it can significantly reduce the weight of the car. Realize vehicle weight reduction and improve fuel economy. [0003] The prior art uses carbon fiber reinforced resin composite materials and foam core materials to prepare composite materials with a foam sandwich structure. The mechanical and safety properties meet the requirements of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K7/06C08J5/04
Inventor 宣善勇李进张静唐少俊张道理
Owner CHERY AUTOMOBILE CO LTD
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