| abstract |
Disclosed is a pressure roll 2A comprising a cylindrical core member 2A3 having a center shaft, an intermediate layer 2A2 surrounding the core member 2A3 and formed from a flexible material, and an outermost layer 2A1 surrounding the intermediate layer 2A2 and formed from a high-thermal conductivity material having a thermal conductivity of not less than 0.03 cal/cm²·sec·°C. Also disclosed is a molding apparatus of a plastic sheet using the pressure roll 2A. According to the pressure roll 2A and the molding apparatus using the pressure roll 2A, when a resin extruded sheet S interposed between the pressure roll and a main cooling roll 2B is pressed onto the main cooling roll 2B, the outermost layer 2A1 of the pressure roll 2A is elastically deformed slightly to apply a surface pressure onto the resin extruded sheet S, while cooling the plastic sheet S. Accordingly, even if the pressure applied to the plastic sheet S is increased, the plastic sheet S is not broken and the plastic sheet S can be efficiently cooled owing to the wide cooling area. Moreover, an extremely thin extruded sheet having prominently excellent surface condition can be prepared. |