Patent ID: 6060124
Filing Date: 2000-05-09
Classification: B29B

Abstract:
A process of producing a prepreg in which a sheet-shaped fabric material as a reinforcing substrate is continuously provided, a thermosetting resin as a matrix resin in a molten state is supplied to the substrate, and the resin is heated, which process comprises the steps of:(a) a first coating step in which the matrix resin is applied to one surface of the reinforcing substrate using a first die coater, and an amount of the matrix resin to be applied is equal to or larger than an amount of the matrix resin which the reinforcing substrate is able to contain in its total void as much as possible,(b) a first heating step in which the reinforcing substrate having the matrix resin is heated by a first non-contact type heating unit so that the matrix resin is impregnated into the inside of the reinforcing substrate, whereby a laminar composite made of the matrix resin and, the reinforcing substrate is obtained,(c) a second coating step in which the matrix resin is further applied to at least one of surfaces of the laminar composite using a second die coater, and(d) a second heating step in which the laminar composite which has an amount of the matrix resin applied in the step (c) is heated by a second non-contact type heating unit so as to semi-harden the matrix resin.