Modular respirator mask with many features and a great fit

thingiverse

Designers created the respirator mask during the Hack the crisis Sweden hackathon on April 5th, 2020. They secured seventh place in the 'Save lives' category. This open mask design was developed for the 3D printing community with a focus on functionality and comfort. The goal is to create a mask that provides a great seal to the face while being reasonably comfortable for wearers. The mask also features attachment points for various components such as valves, filters, or filter adapters. Update: May 5th, 2020 * Additional support for particle filter adapters was added. * A larger filter area attachment was developed for improved breathability. * Second exhaust valve option and exhaust valve cover options were integrated. Update: May 3rd, 2020 * The filtering system for exhaled air is still in development. However, a beta version should be released this week. Update: April 28th, 2020 The filtering system for exhaled air is being fine-tuned. A beta version may be available soon. Update: April 19th, 2020 * An updated Shell design with three variants was added. * Printability updates were made to the strap slits. * The v1.0 STEP file for the Shell was provided. Update: April 12th, 2020 * Headband accessories were added in the form of a STEP file and Fusion 360 project file. * An exhaust port blocker was included for those who wish to block the exhaust valve port. Material Choice The main body of the mask is printed with TPU, which provides a good fit and seal. Valves and straps are also printed with TPU, but it's recommended to use store-bought elastic ribbon or rubber for headbands. Components should be printed using the materials indicated in each file name. Pictures can be used as references, with TPU parts appearing white and PETG parts appearing gray. Fit and Comfort Some users experience discomfort around the upper nose area when wearing the mask. To alleviate this issue, two small cuts can be made to the upper seal. Filter Material Various filter materials can be used for the mask. A great article discussing household items as potential filtration materials is available here: https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/ TODO List * Evaluate softer materials, especially for straps. * Add support for additional particle filters adapters. * Develop an attachment with a larger filter area for easier breathability. * Create child-sized masks. * Implement functionality to filter exhaled air. * Update the exhaust port design. * Add second exhaust valve option. * Include exhaust valve cover option.