Preparation method of carbon fiber prepreg

A carbon fiber prepreg and carbon fiber technology, which is applied in the field of polymer material preparation, can solve the problems of high energy consumption and long production cycle of carbon fiber products, and achieve the effects of low energy consumption, low cost and good mechanical properties

Inactive Publication Date: 2017-10-20
JIANGSU ZHAOJUN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Purpose of the invention: The present invention provides a method for preparing carbon fiber prepregs that can be laid at high temperature and taken out at high temperature during curing. There is no need to cool down during the curing process, which solves the problems of long production cycle and high energy consumption of carbon fiber products

Method used

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  • Preparation method of carbon fiber prepreg
  • Preparation method of carbon fiber prepreg

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: 33kg liquid bisphenol A epoxy resin E44, 37kg novolak epoxy resin NPCN-704 and 30Kg solid bisphenol A epoxy resin NPES-901 are placed in the reactor with vacuum device of 500L, at 90 Stir at ℃ for 30min, after mixing completely, get mixed solution A; add 5kg curing agent dicyandiamide 100S to mixed solution A, stir at 75℃ for 30min, after stirring evenly, get mixed solution B; add to mixed solution B 0.8kg accelerator diurea UR500, after stirring and mixing at 70°C, the mixed solution C was obtained; the cured mixed solution C was placed in the glue spreader to prepare the film used for the prepreg; the film was drawn out, And form a sandwich structure with 200kg carbon fiber 24T, pass through hot pressing rollers successively to melt the resin matrix, insert carbon fiber into the resin matrix, cool, trim, film, and roll to obtain carbon fiber prepreg, and measure the carbon fiber prepreg tensile modulus. The carbon fiber prepreg was paved and cured at 14...

Embodiment 2

[0027] Example 2: 33kg liquid bisphenol A epoxy resin E44, 37kg novolak epoxy resin AG80 and 30Kg solid bisphenol A epoxy resin E20 are placed in a 500L reactor with a vacuum device, stirred at 90°C for 30min , after mixing completely, get mixed solution A; add 3kg curing agent dicyandiamide 100SF to mixed solution A, stir at 80°C for 30min, after stirring evenly, get mixed solution B; add 5kg accelerator II to mixed solution B Urea UR300, after stirring and mixing at 70°C, a mixed solution C is obtained; the above mixed solution C is placed in a glue spreader to prepare a film for prepreg; the film is drawn out and formed into a clip with 108kg of carbon fiber M30 The core structure is sequentially passed through hot pressing rollers to melt the resin matrix, and the carbon fibers are embedded in the resin matrix. After cooling, edge trimming, film coating, and winding, carbon fiber prepregs are obtained, and the tensile modulus of carbon fiber prepregs is measured. The carbo...

Embodiment 3

[0028] Embodiment 3: 50kg liquid bisphenol A epoxy resin E44, 25kg novolak epoxy resin NPCN-704 and 25Kg solid bisphenol A epoxy resin NPES-901 are placed in the reactor with vacuum device of 500L, at 90 Stir at ℃ for 30min, after mixing completely, get mixed solution A; add 8kg curing agent dicyandiamide DDA-5 to mixed solution A, stir at 75℃ for 30min, after stirring evenly, get mixed solution B; Add 0.8kg of accelerator diurea UR200 to the mixture, stir and mix at 75°C, the obtained mixture C is placed in a glue spreader, and the film used for the prepreg is obtained; the film is drawn out and formed with 400kg of carbon fiber M40 Sandwich structure, successively passing through hot pressing rollers to melt the resin matrix, inserting carbon fibers into the resin matrix, cooling, trimming, coating, and winding to obtain carbon fiber prepregs, and measuring the tensile modulus of carbon fiber prepregs. The carbon fiber prepreg was paved and cured at 140°C for 1 hour to obtai...

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Abstract

The invention discloses a preparation method of carbon fiber prepreg. The method comprises the following steps: 1, uniformly stirring phenolic epoxy resin, solid bisphenol A epoxy resin and liquid bisphenol A epoxy resin at 80-90 DEG C for 20-30 min to obtain a solution A; (2) adding a curing agent dicyandiamide to the mixed solution A, and uniformly stirring the solution A and the curing agent at 70-80 DEG C for 20-30 min to obtain a mixed solution B; (3) adding a promoter urea to the mixed solution B, and stirring and mixing the mixed solution B and the promoter at 70-80 DEG C to obtain a mixed solution C; (4) placing the mixed solution C in a gluing machine to obtain a glue film for the prepreg; and (5) allowing the glue film to pass through a hot pressure roller to melt a resin matrix and make carbon fibers embedded in the resin matrix. The carbon fiber prepreg prepared by the method has the advantages of no cooling or heating in the curing process, reduction of production steps, simplification of the production process and reduction of the production cost.

Description

technical field [0001] The invention relates to a method for preparing a polymer material, in particular to a method for preparing a carbon fiber prepreg. Background technique [0002] At present, the methods for producing carbon fiber prepreg mainly include solution method and hot-melt method. The hot-melt method is to make the resin matrix into a resin film with uniform thickness, and then combine two layers of resin film with a layer of continuous fiber or fabric to form an interlayer. structure, and then under a certain temperature and pressure, the resin film is melted and impregnated into fibers or fabrics to form a prepreg. Its advantages are high resin content control accuracy, low volatile content, and no environmental pollution. It is currently the most commonly used prepreg. The impregnation process. Although the hot-melt method can obtain high-precision and high-quality carbon fiber prepregs, the carbon fiber prepregs currently on the market have the following d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/04C08L63/00C08K7/06C08G59/50C08G59/68C08J5/24
CPCC08L63/04C08G59/504C08G59/686C08J5/24C08J2363/00C08J2363/04C08J2463/00C08J2463/04C08L63/00C08L2205/02C08L2205/025C08L2205/03C08K7/06
Inventor 鲁平才杨智明
Owner JIANGSU ZHAOJUN NEW MATERIAL CO LTD
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