Patent ID: 7122614

Claim:
An aromatic polycarbonate resin product for optical disc substrates, the product being produced by adding 0.015 to 0.05 parts by mass of stearic acid monoglyceride to 100 parts by mass of an aromatic polycarbonate resin, adding water having an electric conductivity, as measured at 25° C., of 1 μS/cm or less to the resin, the water content of the resin being controlled so as to fall within the range of 0.05 to 0.2 mass %, melt-extruding the water-added resin, cooling, and cutting to form pellets, the resin having a viscosity average molecular weight (Mv) of 10,000 to 20,000, wherein the melt-extruded aromatic polycarbonate resin is cooled by use of water having an electric conductivity, as measured at 25° C., of 1 μS/cm or less.