METHOD AND DEVICE FOR PRODUCTION OF CARBON FIBER PREPREG Russian patent published in 2020 - IPC B29C70/50 B32B27/04 

FIELD: manufacturing technology.

SUBSTANCE: group of inventions relates to a method and apparatus for producing a prepreg of carbon fiber, which can improve adhesion and dispersion between carbon fiber and resin. Method of producing prepreg carbon fiber comprises performing sizing treatment of carbon fiber using gluing agent, cutting the sized carbon fiber into pieces, spraying said pieces of carbon fiber onto the first resin applied on the surface of the first carrier sheet and combining the second resin applied onto the second carrier sheet and the first resin surface. Sizing agent, the first resin and the second resin include the same compounds. Device for production of carbon fiber prepreg contains a part for pretreatment of fiber, which carries out sizing treatment of carbon fiber, and part for making sheet, which produces sheet using carbon fiber pre-treated with part for preliminary treatment of fiber. Fiber preprocessing part in series includes a fiber roll for feeding carbon fiber, a storage container containing a sizing agent, and a cutting device for cutting carbon fiber. Sheet production part includes a sheet roll for feeding a carrier sheet and a resin coating part containing a resin applied on the surface of the carrier sheet. Sizing agent and resin include the same joint.

EFFECT: improved adhesion and dispersion between carbon fiber and resin and improved mechanical and physical properties of prepreg carbon fiber.

8 cl, 3 dwg, 2 tbl