Tyvek soft facemask with minimal and reusable parts

Model Description

Model ID
3DPX-013519
Category Labware & Devices
Device Use
Safety and Personal Protective Equipment
Keyword(s) PPE 3D print face mask Tyvek reusable COVID
This device is a general purpose face mask intended for use in the community and is not suitable for use by a healthcare professional or in a healthcare facility or environment, as described in FDA Guidance Enforcement Policy for Face Masks and Respirators During the Coronavirus Disease (COVID-19) Public Health Emergency, Section V B. This device has not been tested to assess the out-gassing limits of the material or their corresponding health effects.

This respirator facemask can be built of common materials plus small, easy-to-print 3D printed parts, and a small (55mm) disk of filter material. The mask conforms to the face, with the Tyvek forming an impermeable membrane, concentrating the breathing airflow through the filter housing. The filter housing is made of 2 identical 3D-printed parts that snap together over the filter and around the edge of a circular hole in the Tyvek. The filter material is a 55mm diameter disk of material (hopefully HEPA-certified) that permits sufficient airflow.

The 3D-printed parts are a quick print, using modest amounts of filament. The idea is to make lots of these parts quickly, since 3D printers are the limiting resource.

This mask is intended for emergency use during this pandemic when manufactured products are unavailable.

The following files are supplied:

maskresp40.stl --3D-print Filter Housing half, 2 of these snap together.

maskresp40loose.stl --Variant of maskresp40.stl with looser tolerances

MaskPatterns.PDF --Terse instruction sheet and 4 different-sized mask patterns

MaskInstructions??.PDF --Extensive illustrated instructions and discussion. This file is versioned.

NoseThingy2.stl --3D-print nose-shaper part, holds wire

NoseThingy.stl --Older, shorter version of NoseThingy2.stl

Disk_stencil.stl --3D-print stencil for cutting filter disks (optional)

Plain paper can be substituted for Tyvek, but it is not as durable. Tyvek is available as office supplies, construction material, and protective clothing. Do not print Tyvek with a laser printer. Tyvek is a trademark of DuPont.

I am really interested in real-world feedback on the use of these masks, especially by clinicians, so please comment.

Note that this design is also available at: https://www.thingiverse.com/thing:4257706/

The accompanying documents (look under "Extras" tab) show how to make a face mask using 2 of these parts... MaskPatterns.PDF has four 2d printable patterns for paper-like materials, regular and large size, regular and longer length, MaskInstructions06,PDF has illustrated instructions. Note that DiskStencil.stl is just a round stencil for cutting out filter material to dimension. Note that NoseThingy,stl and NoseThingy2.stl are for making something to mold the mask to the nose bridge (use TPU --needs to be flexible), Then insert wires. [more detail in instrructions]



17 April 2020 Update, files and documents all in place.

18 April 2020 Update to .PDF files, minor.

27 April 2020 Title, keywords, and descriptive summary changed.







3D Modeling/CAD Software
OpenSCAD
Model Origin
Custom illustration/CAD

Printer Technology/Material
Material Extrusion Polylactic Acid (PLA)
Printer Make/Model
ANY
Print Units
mm
Scale At Given Print Units
(already to scale)
Pre- and Postprocessing Instructions
Two of the maskresp40.STL are required for each mask. Paper patterns are in file MaskPatterns.pdf, and assembly instructions are in MaskInstructions04.pdf. Note that this file is set up to be versioned and expanded upon. Disk_Stencil.stl is just a stecil for cutting out filter material. NodeThingy.stl and NoseThingy2.stl are optional files for nose shaper, print it in TPU (50% spped, 120% flow) and insert wires.

Attribution Instructions
Mark Gaponoff

Updated Model files on https://www.thingiverse.com/thing:4257706

Acknowledgements on last page in Instructions

Reviewer Notes
This device is a general purpose face mask intended for use in the community and is not suitable for use by a healthcare professional or in a healthcare facility or environment, as described in FDA Guidance Enforcement Policy for Face Masks and Respirators During the Coronavirus Disease (COVID-19) Public Health Emergency, Section V B. This device has not been tested to assess the out-gassing limits of the material or their corresponding health effects.

*These models sourced with permission from the NIH 3D Print Exchange*

Files

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TDP Category Type Filename Size
General Instructions application/pdf MaskInstructions06.pdf 38.99 MB
General Instructions application/pdf MaskPatterns_1.pdf 138.91 KB
General Instructions application/pdf images.pdf 1.08 MB
STL File maskresp40_2.stl 2.52 MB
Blender-generated-x3d maskresp40_2.stl60bf939ca7210.x3d 430.19 KB
STL File maskresp40loose_1.stl 2.52 MB
STL File NoseThingy2_0.stl 87.70 KB
STL File NoseThingy_3.stl 87.01 KB

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Part Information

Additional Owner's Names

jsaly

AMCPR Type

designPackage

Model Number

3DPX-013519

Review Process

simple

Public

Yes
2021-06-08T15:53:35

Materials

Polymer

General Build Material

PLA

AM Process

Material Extrusion

Quality Standards

Submission Path

production

Assembly Required

No
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