Performance Analysis of Colored PLA Products with a Fused Filament Fabrication Process

Area of Science:

• Materials Science
• Additive Manufacturing
• Polymer Science

Background:

• Polylactic acid (PLA) is a widely used biodegradable polymer in 3D printing.
• Fused Filament Fabrication (FFF) is a common additive manufacturing technique.
• Colorants are often added to PLA filaments, but their effect on part quality is not fully understood.

Purpose of the Study:

• To investigate the influence of color additives in PLA filaments on the quality of FFF parts.
• To identify correlations between PLA properties and the performance of 3D printed components.
• To evaluate the impact of color on thermo-mechanical properties and viscosity.

Main Methods:

• Utilized a commercial FFF machine for part fabrication.
• Characterized material properties using Differential Scanning Calorimetry (DSC) and Rotational Rheometry (RHEO).
• Performed compression tests on cylindrical specimens to assess mechanical strength.

Main Results:

• Significant differences in the performance of FFF parts were observed based on the color of the PLA filament used.
• Color additives demonstrably affect key thermo-mechanical properties, including mechanical strength and viscosity.
• Material temperatures during processing also varied with different filament colors.

Conclusions:

• The choice of color additive in PLA filaments is a critical factor influencing the final quality and performance of FFF parts.
• Understanding these color-dependent variations is essential for optimizing 3D printing processes and material selection.
• Further research into specific additive-property relationships can lead to improved material design for additive manufacturing.