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.