PRODUCTION OF PREPREG WITH PROCESS ACS Russian patent published in 2015 - IPC B29B15/10 

FIELD: process engineering.

SUBSTANCE: proposed method comprises the steps that follow. Weight M_nib of non-impregnated blank is measured to place the latte in sealed chamber. Sealed chamber with said blank is evacuated to determine the quantity of impregnations n_imp and vacuum drying n_dr. Impregnation time is determined for one cycle τ_imp as well as pressure of impregnation in vacuum P_imp. Resin weight M_r in impregnated blank is defined to define the lacquer weight M_l required for blank impregnation and that of lacquer portion M_lp required for every impregnation. Pressure is determined is defined at vacuum P_lb corresponding to lacquer boiling point. Weight of solvent M_bim removed at every drying is defined. This process comprises multiple blank vacuum impregnation and drying and removal of finished prepreg from sealed chamber.

EFFECT: lower costs of materials, lower labour input.

1 dwg