| 摘要 |
PURPOSE:To obtain fiber reinforced plastic, in which ply separation strength, maximum bending strength and impact resistance are favorably balanced one another, by a structure wherein reinforcing material produced by integrally bonding intermediate layer, which is made of polymeric polyethylene fiber yarn having high strength and high elastic modulus in tension, and front surface layer and rear surface layer, both of which are fiber yarn other than the above-mentioned fiber yarn and have favorable adhesion, is empolyed. CONSTITUTION:The reinforcing material for fiber reinforced plastic concerned is fabric, which is produced by mixing weaving at least two kinds of fiber yarns in a plurality of plys or in three plys and more and concretely which consists of intermediate layer mainly made of polymeric polyethylene fiber yarn 1 having the tensile strength of 20g/de or more and the elastic modulus in tension of 500g/de or more and front surface layer and rear surface layer mainly made of other fiber yarns 2 and 3 under the condition that said front surface layer, intermediate layer and rear surface layer are integrally bonded together. Further, in the fiber reinforced plastic concerned, at least one sheet or a plurality of sheets of said reinforcing member for fiber reinforced plastic are used in lamination. |
