Patent ID: 6245383
Filing Date: 2001-06-12
Classification: B29B,Y10T

Abstract:
A method for manufacturing a prepreg in which a reinforcing substrate is impregnated with a thermosetting matrix resin, the method comprising:moving the reinforcing substrate to wind around a circumferential surface of a back-up roller such that an angle .theta..sub.1 between a traveling direction of the reinforcing substrate approaching the back-up roller and a traveling direction of the reinforcing substrate going away from the back-up roller is less than 90.degree.;supplying the thermosetting matrix resin to an outer circumferential surface of a transferring roller which is provided such that the outer circumferential surface of the transferring roller faces the circumferential surface of the back-up roller;transferring the thermosetting matrix resin which substantially contains no solvent and which is in a molten state from the outer circumferential surface of the transferring roller onto a first surface of the reinforcing substrate by pressing the reinforcing substrate with the back-up roller on the transferring roller while the reinforcing substrate moves;forcing the thermosetting matrix resin transferred to the first surface to permeate through the reinforcing substrate by pressing at least one pressing roller on the thermosetting matrix resin transferred to the first surface while the reinforcing substrate moves; andheating the reinforcing substrate impregnated with the thermosetting matrix resin to semi-cure the thermosetting matrix resin.