Abstract:
PURPOSE: A method for manufacturing molded products of polymer compositions having thermal conductivity and thermal resistance and a molded product of polymer compositions having the thermal conductivity and thermal resistance manufactured thereby are provided to include different kinds of thermal conductivity fillers having different shapes so that the thermal conductivity fillers have the directionality and to have excellent thermal conductivity and mechanical strength because the contact rate between the thermal conductivity fillers is excellent. CONSTITUTION: A method for manufacturing molded products of polymer compositions having thermal conductivity and thermal resistance comprises the following steps: melting thermal resistant polymer resin and a first thermal conductivity filler in an extruder and extruding them; adding a second thermal conductivity filler in a mixture extruded in an injection molding machine, melting them, and injection-molding them. [Reference numerals] (AA,DD,HH) Normal direction; (BB,FF,GG) Flow direction; (CC,EE,II) Transversal direction
Abstract:
PURPOSE: A polymer composition is provided to use two kinds of thermoconductive fillers with a plate shape and a fiber shape, to improve a contact ratio among the thermoconductive fillers, and to improve mechanical strength by having have directionality on thermoconductive fillers in a polymer composition. CONSTITUTION: A polymer composition comprises 20-80 weight% of heat resistant polymer resin and 20-80 weight% of thermoconductive filler. The thermoconductive filler comprises a plate shape thermoconductive filler and a fiber shape thermoconductive filler. The heat resistant polymer resin is one or more selected from polyphenylene sulfide, polycarbonate, and polyamide. A manufacturing method of the polymer composition comprises: a step of melting and mixing the thermoconductive polymer resin and the plate shape thermoconductive filler; and a step of melting and mixing the fiber type thermoconductive filler in the mixture. [Reference numerals] (AA,DD,HH) Perpendicular direction; (BB,FF,GG) Flowing direction; (CC,EE,II) Transversal direction