## 1 Introduction
Moreover, high electricity consumption not only does not meet green production standards, but also increases the company's economic expenditure on dryer machine purchases. Therefore, the objective of this study is to investigate the influence of plasticization parameters on moisture content and to assess if the moisture in the pellets can be removed directly during the plasticizing stage; this will enable reduction in the drying time, avoid possible problems with absorbed moisture, and power-saving to achieve green production standards. In injection molding, the maximum allowable moisture content is typically low [13], which can be adjusted based on material properties. If the pellet has an excessive moisture content, then some plastic materials will react with the water vapor at high temperature, and air bubbles will be generated [14] by mixing with the molten material during the plasticization process. These air bubbles are injected into the mold cavity during the injection phase, resulting in an air bubble defect in the output product part as nearby air bubbles fuse together to form one big bubble form. The size and number of air bubbles that appear in the final product part vary throughout the process based on the melt temperature, screw rotation rate, melt pressure, and melt state of the melt resin. [PERSON] and [PERSON] [15] proposed that surface defects, such as splay marks and silver streaks, are most often caused by bubbles in the melt coming from moisture, trapped air, etc. They suggest that appearance properties are heavily influenced by the plasticization variables of screw rotation, back pressure, and melt temperature and suggest that higher screw rotation and melt temperature cause more bubble formation since the melt is less viscous, while [PERSON] [16] suggested that back pressure removes trapped air, gases, and moisture from the pellet. All these exemplify that the generation of air bubbles, splay marks, and silver streaks, due to material moisture, is heavily influenced by the plasticization variables,melt quality, and melt temperature. According to [PERSON] and [PERSON] [17], plasticization melt quality and melt temperature is determined by the processing operating conditions, such as screw speed rotation, barrel temperature, barrel resident time, and the effect of shear heating and heat absorption rate on the molten resin. [PERSON] [18] successfully assessed the impact of screw speed, back pressure, and injection stroke on melt temperature distribution using infrared sensors. Similarly, [PERSON] [19] assessed the online quality monitoring of melt resin variation by placing a pressure sensor on the load cell, nozzle, and mold cavity and by attaching four strain gauges on the tie bars of the machine. He repeated the experiment with different back pressure, barrel temperature, and screw speed rotation level, and assessed pressure, viscosity, and energy quality indexes. Many of these studies indicate that variation in melt temperature and melt quality at the plasticization stage is heavily dependent on the effect of screw rotation, back pressure, and melt temperature. Furthermore, the melt temperature and melt quality of the polymer plays a key role in the generation of bubbles in the injection molding plasticization process. Thus, the effects of plasticization variables, the impact of material moisture content, and resin melt state quality are inextricably linked with each other and an experimental study is required to analyze the output response. For this purpose, factorial design analysis has proven to be an effective, reliable, and cost-effective solution in investigating the effect of each parameter variable with the influence of moisture content on the output response. Factorial designs [20] are experimental studies that use more than one independent variable to study the effect on the output response.