Polypropylene is a semi-flexible water-resistant lightweight material. PP is relatively lightweight and has good chemical resistant properties.
PP can be printed in a sterile FDA approved environment for food safe applications. Depending on additives in the filament, Polypropylene can also have heat resistant properties, and can be used in the microwave and dishwasher without issue. While printing it has excellent layer bonding, giving prints a good solid finish and making layer lines unnoticeable. Polypropylene commonly warps while printing if a temperature change occurs, making it quite challenging to work with. PP has trouble adhering to most 3D printer surfaces and may need some additional support such as using a raft or tape depending on printer and filament used.
Used for: Food-Based Applications, Watch Straps, Containers.