I know that there is no need for 3D printing to make this model but the information shown here will surely be very useful!

https://www.youtube.com/watch?v=7oAzz6llxvs

This video presents the development by laser cutting of a face shield helmet to protect against the projection of microdroplets on mucous membranes from a person potentially infected with Covid-19. This helmet is simple and very light, very pleasant to wear for long hours, it can be easily and properly cleaned, and it can be produced quickly and at a very low price.

Files available by following the link:

https://github.com/face-shield-helmet-covid/laser-cutter

The materials used in this example are:

• Head: PET 0.35mm
• Top: PET 0.35mm
• Face shield: PMMA 0.75mm

Other materials and thicknesses can be used.

This helmet is in addition to other personal protection accessories and does not replace the important rules of hygiene and safety recommended by the authorities.

Take care of yourself !