초록

There is provided 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 contains the steps of:

대표청구항 ▼

[ We claim:] [1.] 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

[ We claim:] [1.] 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. [22.] An apparatus for producing a prepreg which comprises an unwinding unit of a reinforcing substrate, an accumulator unit which works upon exchange of a reinforcing substrate feed roller so as to continue a process for producing the prepreg, storage tanks which keep a main composition (A), a hardener composition (B), and a hardening promoter composition (C) at a predetermined temperature in their fluidic states respectively, metering devices which dispense the compositions from the tanks respectively, a mixing unit which mixes the metered compositions together to prepare a matrix resin, a first die coater which applies the matrix resin to the reinforcing substrate, a first non-contact type heating unit which impregnates the reinforcing substrate with the matrix resin to form a laminar composite, a first detector which detects an impregnation state of the matrix resin into the reinforcing substrate, a second detector which detects matrix resin which reaches a side of the reinforcing substrate which is opposite a first coating side, a second die coater which applies the matrix resin to the laminar composite, a second heating unit which semi-hardens the matrix resin included in the laminar composite, a compaction roller unit which presses and smooths the reinforcing substrate impregnated with the matrix resin and which also keeps the reinforcing substrate at a predetermined temperature, and a wind-up roller which winds up the produced prepreg or a cutting unit which cut the produced prepreg transversely.