Evaluation of 3D-printer settings for producing personal protective equipment

Area of Science:

• Biomedical Engineering
• Materials Science
• Additive Manufacturing

Background:

• The COVID-19 pandemic created critical shortages of personal protective equipment (PPE).
• Community-driven initiatives utilized 3D printing to produce essential medical supplies like face shield headbands.
• Optimizing 3D printing parameters is crucial for efficient and effective production.

Purpose of the Study:

• To investigate the impact of various 3D printing parameters on the mechanical strength and print time of face shield headbands.
• To identify optimal settings for producing strong and rapidly manufactured face shields.

Main Methods:

• Evaluated combinations of infill density (50%, 100%), shell thickness (0.8 mm, 1.2 mm), line width (0.2 mm, 0.4 mm), and layer height (0.1 mm, 0.2 mm).
• Assessed material properties using tensile testing and finite element analysis.
• Measured and compared printing times for different parameter combinations.

Main Results:

• Increased infill density and shell thickness significantly enhanced headband strength (p < 0.001).
• Greater line width also correlated with increased strength (p < 0.001).
• Layer height did not significantly affect the mechanical strength of the printed headbands.

Conclusions:

• Optimizing infill density and shell thickness is key to maximizing the strength of 3D-printed face shields.
• Adjusting layer height and line width can substantially decrease printing time, improving production efficiency.
• Recommended printing parameter adjustments balance strength and speed for community-based PPE manufacturing.