Patent ID: 8865795

Claim:
A method for producing a copier/printer exterior part from a chlorine-free and bromine-free flame-retardant resin composition comprising: 5 wt % to 50 wt % of unused polycarbonate; 20 wt % to 63 wt % of recycled polycarbonate; 5 wt % to 35 wt % of recycled polyethylene terephthalate; 0.2 wt % to 2 wt % of a styrene-acrylonitrile-glycidyl methacrylate terpolymer; the styrene-acrylonitrile-glycidyl methacrylate terpolymer includes 1 wt. % to 5 wt. % of glycidyl methacrylate and 20 wt. % to 33 wt. % of acrylonitrile, 5 wt % to 15 wt % of a toughener; 10 wt % to 20 wt % of a flame retardant; 0.1 wt % to 0.8 wt % of a flame-retardant antidrip agent; 0.1 wt % to 1 wt % of an antioxidant; and 0.1 wt % to 2 wt % of a lubricant, the method comprising obtaining materials of the resin composition; mixing the recycled polyethylene terephthalate material and the styrene-acrylonitrile-glycidyl methacrylate terpolymer material in a mixer so as to make a first mixture; extruding the first mixture in a screw extruder so as to produce a base grain; mixing the base grain and the remaining materials in a mixer so as to make a second mixture; extruding the second mixture in a screw extruder so as to produce a final grain as the chlorine free and bromine-free flame-retardant resin composition; and manufacturing the copier/printer exterior part from the final grain.