Abstract: The present invention provides a base cloth for reinforcement produced by winding a weldable yarn on either one of a warp or weft or the both at a definite interval, arranging the warp and weft in the respective directions and then thermally welding the both yarns. According to this method, the fraying of warp or weft, particularly easy fluffing of carbon fibers, etc. can be prevented by winding the weldable yarn. And, it is sufficient for the weldable yarn to be present at the intersections between the warp and weft. Consequently, as compared with a case wherein the whole weft is impregnated with adhesives, penetration of the matrix resin can sufficiently be attained and thus, strength in the weft direction can be improved.

Abstract: The present invention provides a non-woven reinforcements for resinous composite. The reinforcements are constructed with warps consisting of non-twist yarns or soft twist yarns of multi-filament having a high strength and a high modulus on one or both sides of wefts of non-twist yarns of soft twist yarns containing adhesive agent, in which the warps and the wefts are bonded at intersections thereof.As the reinforcement of the present invention has no flexure different from a woven fabric, fiber's physical property such as a high strength, a high modulus and the like is reflected faultlessly on the composite using the reinforcement.In the reinforcement warp is not substantially restrained, so that matrix resin can be impregnated sufficiently into the reinforcement.Further, because the warps and wefts are bonded at intersections by adhesion, the reinforcement is much easier to be handled without deformation or falling off especially after cutting than the case of a woven fabric.