particles ranging from 2.5 to 10 wt% with the interval of 2.5 wt% each. The extruder was run at 80 rpm and 190 o C in the extrude zone and 180 oC in blending zone. After cooling, the extruded mixtures were chopped into pellets. These pellets were dried in the dryer at 70 oC for 2 h prior to injection moulding. The injection moulding was carried out with four temperature zones. The nozzle temperature was 183 oC and all other zones were kept at 180 oC. The mould was set to 50 oC. The pressure was maintained at 1 bar