| 摘要 |
PURPOSE:To improve the pressure resistance and the impact resistance of a pipe by arranging continuous reinforcing fibers on a second reinforcing layer in the almost peripheral direction of the pipe. CONSTITUTION:The two layer pipe (b) which has a thermoplastic resin inner layer B2 and the first reinforcing layer A2 in which the reinforcing fibers outside of the layer B2 are arranged in axial direction, is formed of a sheet (a). Next, while said two layer pipe (b) is advanced in the state as it is, the tape (c) composed of the fiber composite layer C1 for the second reinforcing layer made by holding thermoplastic resin on the continuous reinforcing fiber arranged in longitudinal direction and the thermoplastic resin layer D1 formed on one surface of the layer C1 is spirally wound on the outer periphery of the pipe (b) with a thermoplastic resin layer D1 kept outside thereof. Further, said fiber composite layer C1 is welded to the first reinforcing layer A2, and then the second reinforcing layer C2 in which reinforcing fibers are arranged almost in peripheral direction, is formed on the outer surface of the first reinforcing layer A2, and a thermoplastic resin outer layer D2 is formed on the outer side thereof, whereby the desired fiber reinforced resin pipe as a four layer pipe (d) is obtained. |
