The batch mixture was extruded in different temperature profiles using single
screw 25 mm,30L/D floor model vented extruder (Lab Tech Engineering Co. Ltd., Thailand).
The mixture was then pressed with hydraulic compression under a hot molten
condition of extruded mixture using a hydraulic press machine (Model 4P150F 2416,
Beckwood Press Co., USA). The process conditions are summarized in Table 2.