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Process for producing composite prepreg base, layered base, and fiber-reinforced plastic

A technology of prepreg and manufacturing method, applied in the field of fiber reinforced plastics, can solve problems such as poor fiber fluidity, and achieve the effects of good fluidity, excellent mechanical properties, and a wide selection range

Active Publication Date: 2009-08-26
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, in the prepreg base material described in Patent Document 1, although the matrix resin is a thermoplastic resin with a high melt viscosity, only incisions are introduced into the prepreg base material. If the molded product of the prepreg base material has concave and convex parts, it cannot be molded following the shape of the concave and convex parts, and the prepreg base material itself and the slit in the prepreg base material are cut off and discontinuous Poor fluidity of fibers of a certain length

Method used

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  • Process for producing composite prepreg base, layered base, and fiber-reinforced plastic
  • Process for producing composite prepreg base, layered base, and fiber-reinforced plastic
  • Process for producing composite prepreg base, layered base, and fiber-reinforced plastic

Examples

Experimental program
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Effect test

Embodiment 1

[0220]Heat and knead epoxy resin with a kneader ("Epikote (registered trademark)" 828: 30 parts by weight, "Epikote (registered trademark)" 1001: 35 parts by weight, "Epikote (registered trademark)" manufactured by Japan Epoxy Resin Co., Ltd., "Epikote (registered trademark)" )” 154: 35 parts by weight), 5 parts by weight of thermoplastic resin polyvinyl formal (CHISSO (Co., Ltd.) “Vinylec (registered trademark)” K), 3.5 parts by weight of curing agent dicyandiamide (Japan Epoxy Resin Co., Ltd. ) DICY7), and 4 parts by weight of curing accelerator 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU99 manufactured by Hodogaya Chemical Industry Co., Ltd.), to prepare polyvinyl alcohol Uncured epoxy resin composition 1 in which formaldehyde is homogeneously dissolved. This epoxy resin composition 1 was coated on release paper using a reverse roll coater (reverse roll coater) to make 19g / m 2 The resin film 1.

[0221] Next, a resin film 1 is laminated on both sides of unidirectionally...

Embodiment 2

[0230] Heating and kneading epoxy resin with a kneader ("Epikote (registered trademark)" 828: 9 parts by weight, "Epikote (registered trademark)" 1001: 35 parts by weight, "Epikote (registered trademark)" manufactured by Japan Epoxy Resin Co., Ltd. )" 1004: 20 parts by weight, "Epikote (registered trademark)" 807: 36 parts by weight), 5 parts by weight thermoplastic resin polyvinyl formal (CHISSO Co., Ltd. "Vinylec (registered trademark)" K), 4.5 parts by weight Parts of curing agent dicyandiamide (Japan Epoxy Resin Co., Ltd. DICY7), and 3 parts by weight of curing accelerator 3-(3,4-dichlorophenyl)-1,1-dimethylurea (Hodogaya Chemical DCMU99 manufactured by Kogyo Co., Ltd., uncured epoxy resin composition 2 (resin minimum viscosity 3.4 Pa·s) in which polyvinyl formal was uniformly dissolved was prepared.

[0231] Using this epoxy resin composition 2, a prepreg base material 2 (tensile strength of carbon fiber 4,900MPa, tensile modulus of elasticity 235GPa, weight per unit area...

Embodiment 3

[0237] Epoxy resin (ELM434 manufactured by Sumitomo Chemical Co., Ltd.: 90 parts by weight, Epicron 830 manufactured by Dainippon Ink Chemical Industry Co., Ltd.: 10 parts by weight) and 15 parts by weight of thermoplastic resin polyethersulfone (Sumitomo Chemical Co., Ltd. Industrial Co., Ltd. SUMIKAEXCELPES5003P) and 35 parts by weight of curing agent 4,4' diaminodiphenyl sulfone (Sumicure S manufactured by Sumitomo Chemical Industry Co., Ltd.) to prepare an uncured epoxy resin composition in which polyethersulfone is uniformly dissolved 4 (minimum viscosity of resin 0.4Pa·s).

[0238] Using this epoxy resin composition 4, a prepreg base material 3 (tensile strength of carbon fiber 5,400MPa, tensile modulus of elasticity 294GPa, weight per unit area of ​​carbon fiber 150g / m 2 , matrix resin content 25wt%, prepreg substrate thickness 0.14mm).

[0239] Incisions were introduced into this prepreg base material, and a resin film (resin weight per unit area: 40 g / m 2 , film thi...

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Abstract

The invention relates to a process for producing composite prepreg base. The composite prepreg base comprises: a raw prepreg base comprising a fiber sheet comprising discontinuous reinforcing fibers arranged in one direction and having a fiber length of 1-300 mm and a matrix resin infiltrated into the fiber sheet; and an additional resin layer formed on at least one surface of the raw prepreg base. The composite prepreg base is produced by a process comprising (i) the step of preparing the raw prepreg base and (ii) the step of forming an additional resin layer on at least one surface of the raw prepreg base prepared. The invention also relates to a layered base comprising two or more sheets of the composite prepreg base which have been superposed so that the additional resin layer is present on at least one surface; and a fiber-reinforced plastic formed by heating and pressing the layered base.

Description

technical field [0001] The invention relates to a manufacturing method of a composite prepreg base material, a laminated base material formed by laminating multiple composite prepreg base materials, and a fiber reinforced plastic formed from the laminated base material. Background technique [0002] Fiber-reinforced plastics (hereinafter sometimes abbreviated as FRP) composed of reinforcing fibers and matrix resins have high specific strength and specific elastic modulus, excellent mechanical properties, and high functional properties such as weather resistance and chemical resistance. It has also attracted much attention in industrial applications, and its demand is increasing year by year. [0003] As a molding method for FRP with high functional properties, autoclave molding is most commonly used, that is, a continuous reinforcing fiber sheet is impregnated with a matrix resin, and the matrix resin produced is a prepreg in a semi-cured state. A plurality of prepreg base ...

Claims

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Application Information

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IPC IPC(8): B29B11/16B29C43/20B29C43/34
CPCB29B11/16B29C70/20C08J5/24B29C70/025B29K2105/0854B29C70/545B29C70/086B32B5/12B29C43/003B29C70/202B29K2105/0872Y10T428/254Y10T428/269Y10T156/1052Y10T156/1082Y10T428/24959Y10T156/1056Y10T156/1057Y10T428/24628Y10T428/24132Y10T442/2369Y10T442/2139Y10T442/2951Y10T442/643Y10T442/2033B29C2793/0081B29B15/08C08J5/243C08J5/249C08J5/242B29C2793/0036B29C43/20B29C43/34
Inventor 和田原英辅山内雅浩武田一朗北野彰彦
Owner TORAY IND INC
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