Table 1.

General Characteristics of Common 3D-printing Materials for Use in PPE

Material	Maximum Temp*	Basic Characteristics	Biocompatibility	Chemical Cleaning Concerns
Polypropylene	82.2°C Higher temps may compromise material	Relatively cheap thermoplastic. Can be used as both a plastic and a fiber	Currently used for: suture material, meshes, laboratory containers, drug delivery systems	Good chemical resistance (www.hmcpolymers.com), highly resistant to alcohol and solvents, negligible effects in bleach.
PLA	60-65°C Not suggested to heat sanitize	Good all-purpose FFF printing filament	Additives may not be biocompatible	Alcohol and solvents will degrade item
TPE/TPU	Do not apply heat	More flexibility	Additives may not be biocompatible	Alcohol and solvents will degrade item

*General guidelines, properties may vary slightly among brands

Table modified from: Covid-19|Healthcare Coalition (https://c19hcc.org)