Carbon fiber molding material, molding material, and carbon fiber-strengthening composite material

A carbon fiber and forming blank technology, which is applied in the direction of fiber type, fiber treatment, thin material treatment, etc., can solve the problem of insufficient improvement of the adhesion between carbon fiber and matrix resin

Inactive Publication Date: 2014-08-06
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this proposed method, although EDS, which is an indicator of adhesion, is shown to be improved, the effect of improving the adhesion between carbon fiber and matrix resin is still insufficient. In addition, the effect of improving adhesion is limited only to special The case of the carbon fiber combination is presented

Method used

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  • Carbon fiber molding material, molding material, and carbon fiber-strengthening composite material
  • Carbon fiber molding material, molding material, and carbon fiber-strengthening composite material
  • Carbon fiber molding material, molding material, and carbon fiber-strengthening composite material

Examples

Experimental program
Comparison scheme
Effect test

reference example 1

[0498] (Reference example 1) Manufacturing method of prepreg A

[0499] The epoxy resin compositions in the compounding proportions described in Tables 1 to 4 were coated on a release paper using a reverse roll coater to prepare a resin film.

[0500] The carbon fiber bundles coated with the sizing agent are unidirectionally paralleled, clamped from both sides by the above-mentioned resin film, and heated and pressed to impregnate the resin to obtain a carbon fiber with a weight per unit area of ​​190g / m 2 A carbon fiber molding material (Z) which is a unidirectional prepreg having a carbon fiber content of 65% by mass.

[0501] The unidirectional prepreg is cut out, laminated with a predetermined configuration, and heated and cured in an autoclave (heating rate 1.5°C / min, pressure of 0.59MPa, molding at a temperature of 180°C for 2 hours) to produce a laminated board .

reference example 2

[0502] (Reference example 2) Manufacturing method of prepreg B

[0503] For the epoxy resin composition in Table 5, mix ingredients other than epoxy-modified polyamide particles to make a matrix resin composition, and use a reverse roll coater to coat it on a release paper to make a weight per unit area of ​​31 g / m 2 resin film (primary resin film).

[0504] The carbon fiber bundle coated with the sizing agent is unidirectionally paralleled, clamped from both sides by a resin film, heated and pressed to impregnate the resin, and the weight per unit area of ​​the carbon fiber is 190g / m 2 primary prepreg.

[0505] Next, the thermosetting resin composition containing epoxy-modified polyamide particles was coated on the mold release surface using a reverse roll coater so that the composition of the epoxy resin composition in the prepreg was as shown in Table 5. The weight per unit area of ​​resin made on paper is 21g / m 2 resin film (secondary resin film). By laminating the sec...

reference example 3

[0507] (Reference example 3) Manufacturing method of prepreg C

[0508] The epoxy resin composition of the compounding ratio shown in Table 6 was coated on the release paper using the reverse roll coater, and the resin film was produced.

[0509] The carbon fiber bundle coated with the sizing agent is unidirectionally paralleled, clamped by the above resin film from both sides, heated and pressed to impregnate the resin, and the carbon fiber has a weight per unit area of ​​125g / m 2 A carbon fiber molding material (Z) which is a unidirectional prepreg having a carbon fiber content of 76% by mass.

[0510] The unidirectional prepregs were cut out, laminated with a predetermined configuration, and heated and cured using an autoclave (heating rate 1.5°C / min, pressure of 0.59MPa, molding at a temperature of 135°C for 2 hours) to produce a laminated board.

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Abstract

A carbon fiber molding material is provided that exhibits excellent interfacial adhesion between the carbon fibers and a thermosetting resin, and that yields a molded product exhibiting excellent mechanical properties. The carbon fiber molding material is either (Z) a prepreg containing sizing agent-coated carbon fibers and a thermosetting resin, or (Y) a material for forming woven fabric or braided cords that employs sizing agent-coated carbon fibers. The sizing agent is characterized by containing the following components (A) and (B): component (A) is an epoxy compound having two or more epoxy groups, or two or more functional groups; component (B) is a compound containing one or more of the group consisting of a tertiary amine compound, a tertiary amine salt, a quaternary ammonium salt, a quaternary phosphonium salt, and a phosphine compound. The sizing agent is obtained by blending 0.1-25 parts by mass of the compound (B) with 100 parts by mass of the compound (A).

Description

technical field [0001] The present invention relates to carbon fiber molding blanks, molding materials, and carbon fiber reinforced composite materials that can be suitably applied to aircraft components, spacecraft components, automobile components, ship components, and the like. Background technique [0002] Carbon fiber is not only light but also has excellent strength and elastic modulus. Therefore, composite materials combined with various matrix resins have been used in aircraft components, spacecraft components, automobile components, ship components, civil engineering and construction materials, and sporting goods. Various fields. In a composite material using carbon fibers, it is important to have excellent adhesion between the carbon fibers and the matrix resin in order to exhibit the excellent characteristics of the carbon fibers. [0003] In order to improve the adhesiveness between the carbon fiber and the matrix resin, a method of introducing an oxygen-contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08J5/06D06M15/55
CPCC08J5/24C08L63/04D06M15/55C08L63/00Y10T428/2918Y10T442/2008C08J5/06C08J2363/00C08J2363/02C08J2363/04D06M2200/40C08J5/248C08J5/243C08J5/042C08K9/04
Inventor 中山义文釜江俊也小林大悟远藤真
Owner TORAY IND INC
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