초록 ▼

A preformed material for use in fiber reinforced plastics is formed by laminating and integrally bonding a plurality of sheet-like substrates comprising reinforcing fibers. At least one of the laminated substrates is a woven fabric substrate having bonding material composed of a thermoplastic polyme

A preformed material for use in fiber reinforced plastics is formed by laminating and integrally bonding a plurality of sheet-like substrates comprising reinforcing fibers. At least one of the laminated substrates is a woven fabric substrate having bonding material composed of a thermoplastic polymer pre-adhering to the substrate and extending substantially linearly along reinforcing yarns or auxiliary filamentary yarns of the substrate. Due to the bonding material the substrates of the preformed material are effectively bonded to each other even if the amount of the bonding material is small, no deterioration occurs in the arrangement and the distribution of the reinforcing fibers, no dislocation of the substrates occurs during a manufacturing process, and excellent characteristics of and a high productivity for forming the fiber reinforced plastics can be obtained.

대표청구항 ▼

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

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 mm2; 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.