Preformed material for fiber reinforced plastics

A performed material for use in fiber reinforced plastics comprising:

• a plurality of sheet-like substrates comprising reinforcing fibers and laminated with each other, at least one of adjacent said substrates being a woven fabric substrate which has reinforcing yarns of reinforcing fibers extending at least in one direction, said reinforcing yarns are multifilaments and the cross sectional area of the reinforcing yarn is in the range of 0.03-0.60 mm.sup.2 ;
• and
• bonding material composed of a thermoplastic polymer, said bonding material pre-adhering to said woven fabric substrates and extending substantially linearly, said bonding material being situated on at least one surface of a said woven fabric substrate and integrally bonding said woven fabric substrate and an adjacent said substrate, said bonding material is in the range of 0.2-10 wt. % of the reinforcing yarns, and said bonding material is formed by softening or melting one of yarns which are composed of a thermoplastic polymer and which have been woven into the woven fabric substrate together with the reinforcing yarns.