ประสิทธิภาพของการอบแห้งเมล็ดพลาสติกด้วยเครื่องอบแห้งชนิดถังและชนิดทรงกระบอกหมุน

Abstract

The research goal of this research was to study the effects of drying temperature and type of a dryer of the polycarbonate pellets drying on the moisture content of product and specific energy consumption. Moreover, the tensile property of plastic product made from dried polycarbonate pellets was tested. The polycarbonate pellets with initial moisture content of about 0.186-0.193% wet basis were dried at 80, 100 and 120 'C for 5 hours by hopper dryer and rotary dryer with the hot air velocity of 0.4 and 4 m/s, respectively. From the experiment, the results showed that the moisture content of the polycarbonate pellets and specific energy consumption decreased with increasing temperature and the drying with a rotary dryer at 120 'C  provided the lowest final moisture content and minimum specific energy consumption. In addition, the plastic product made from dried polycarbonate pellets obtained from both types ofdryer had higher tensile strength than that made from non dried polycarbonate pellets.