| 摘要 |
PURPOSE:To orientate discontinuous fibers to one direction and contrive to ensure mechanical strength, which is high in the direction of orientation, by a method wherein the shape of each one of drain ports, which are arranged below mesh belt is specified when the mixed layer of discontinuous fibers and thermoplastic resin is produced on the mesh belt in paper making manner by draining the liquid in foaming liquid dispersion through the mesh belt and the drain ports. CONSTITUTION:Discontinuous fibers, thermoplastic resin and the like are dispersion-mixed with foaming liquid such as water added with surface-active agent or the like in a dispersion tank 1. The foaming liquid dispersion is passed through a head box 2 and caught on the mesh belt 3 in paper making manner. The liquid in the foaming liquid dispersion is drained through the mesh belt 3 and drain ports 4, which are installed below the mesh belt 3, by vacuum. The drain port 4 is opened parallel to the traveling direction of the mesh belt 3. The width 5 of each opening is less than the length of the discontinuous fiber. The number of slits is provided so as to correspond to the width of the mesh belt 3. After the liquid in the foaming liquid dispersion is drained, the mixed layer of the discontinuous fibers and the thermoplastic resin is dried with a dryer 6 and, when necessary, pressed with a hot press 7, resulting in forming in dense sheet. |
