| 摘要 |
PURPOSE:To prepare a thermoplastic resin sheet wherein a colored resin layer is embedded in a transparent resin layer and a thin part is formed to the boundary part of the colored resin layer on the side of the transparent resin layer without requiring the precise processing technique of a slit part and exerting large effect on the shape of the colored resin layer by the extrusion amount or viscosity of a transparent thermoplastic resin. CONSTITUTION:A slit part 8 receiving the supply of a colored thermoplastic resin (a) is provided to the manifold 3 of an extrusion mold l so as to be arranged at a position where the transparent thermoplastic resin (a) has the flow in the lateral direction within the manifold 3. A lip 9 is provided to either one of the opening upper and lower edges of the slit part 8 so as to extend toward a die orifice. The colored resin (b) extruded into the manifold 3 from the slip part 8 receives the effect of the flow of the transparent resin (a) and the effect of the lip 9. |
