Preparation method of low-cost and large-tow 48K carbon fiber preimpregnated cloth and composite material thereof

Abstract

The invention discloses a preparation method of a low-cost and large-tow 48K carbon fiber preimpregnated cloth and a composite material thereof. According to the preparation method disclosed by the invention, a resin system compound formula and an impregnating-rolling dual-configuration method are adopted, so that the viscosity of a resins system is reduced, the infiltrating effect is improved, and the technical difficult problems that a fiber bundle is low in resin content, high in content of volatile components, uncontrollable in resin content and the like are solved. The invention also provides the preparation method of the 48K large-tow carbon fiber epoxy resin preimpregnated cloth; after forming, epoxy resin carbon fiber prepreg and a composite material thereof which are low in cost, high in performance and suitable for large-scale application in all industrial fields are obtained; the preparation cost of the composite material is greatly reduced, the application form and the application range of carbon fibers are widened, and the production efficiency and the stability of a process and a product are improved; large size, diversification and structural complication of the product can be realized; and the invention provides a low-cost carbon fiber raw material for application in the fields such as communication and transportation, engineering machinery, constructional engineering and energy.

Description

technical field [0001] The invention belongs to the technical field of manufacturing high-performance fiber composite materials, and in particular relates to a low-cost, large tow 48K polyacrylonitrile-based carbon fiber prepreg and a method for manufacturing the composite material. Background technique [0002] Carbon fiber is a high-performance new fiber material. Its mass is lighter than metal aluminum, and its specific gravity is less than 1 / 4 of that of steel. The tensile strength of carbon fiber resin composite materials is generally above 3500MPa, which is 7 to 9 times that of steel. , The tensile modulus of elasticity is 23000-43000MPa, which is also higher than that of steel. Carbon fiber has many excellent properties at the same time. Carbon fiber has high axial strength and modulus, low density, high specific performance, no creep, ultra-high temperature resistance in non-oxidizing environment, good fatigue resistance, specific heat and electrical conductivity bet...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of high cost, product quality stability and single structure that limit the large-scale application in the field of carbon fiber industry, the purpose of the present invention is to provide a kind of epoxy resin pre-impregnated 48K large-tow carbon fiber, while using independent epoxy resin pre-impregnated The composition of impregnation cloth overcomes the problem of high volatile content, and obtains low-cost, high-performance epoxy resin carbon fiber prepreg and its composite materials suitable for large-scale application in various industrial fields. The composite material uses autoclave method and prepreg The vacuum-assisted forming process of formed parts is realized. Compared with the traditional molding process, the application form and application range of carbon fiber are greatly expanded, the production efficiency is improved, the dimensional stability is good, the manufacturing cost of composite materials is greatly reduced, and the large size of the product is realized. , diversification and structural complexity

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