Patent ID: 7220453

Claim:
A wet process for manufacturing a cloth prepreg comprising placing a binder in a form of a non-woven web on a woven fabric comprising warp and weft yarns, heat-pressing the non-woven web to melt the binder and to fix the flatness of the warp and weft yarns, and subsequently impregnating the woven fabric with a diluted resin by dipping the woven fabric into and passing through the diluted resin placed in a resin bath and drawing out the woven fabric impregnated with the diluted resin from the resin bath and drying the woven fabric impregnated with the diluted resin, wherein after the wet process the woven fabric has a number of crossing points of the warp and weft yarns in the range of 2,000 to 70,000/m 2 , wherein the diluted resin comprises a solvent, at least 80% of the solvent being incompatible with the binder.