Hot-Pressing Process of Flat-Pressed Wood-Polymer Composites: Theory and Experiment

Area of Science:

• Materials Science
• Chemical Engineering
• Composite Materials

Background:

• Flat-pressed wood-polymer composites (FPWPCs) manufacturing involves a critical hot-pressing stage.
• Optimizing hot-pressing parameters is essential for efficient FPWPC production and material properties.

Purpose of the Study:

• To develop a predictive mathematical model for the hot-pressing process of FPWPCs.
• To analyze the influence of material composition and processing conditions on pressing time and temperature.

Main Methods:

• Development of a mathematical model for hot-pressing FPWPCs.
• Experimental validation of the model using hot-pressed FPWPC samples.
• Analysis of temperature and time data during the hot-pressing cycle.

Main Results:

• Increased wood particle content significantly extended pressing time.
• Core mat temperature remained stable initially, then rose sharply to 100°C, with a distinct transition at higher wood content.
• Higher pressing temperatures and lower densities reduced heating time, as predicted by the model.
• The model achieved a 2.5% Mean Absolute Percentage Error (MAPE), demonstrating high accuracy.

Conclusions:

• The developed mathematical model accurately predicts FPWPC hot-pressing time and temperature.
• The model can be utilized for optimizing FPWPC production by adjusting parameters like temperature, wood-polymer ratio, thickness, and density.
• Findings provide valuable insights into the thermal behavior of FPWPCs during hot pressing.