Equipment Needed for DLS™ Production
To produce face shields with DLS™ technology, you will need the following equipment:
- Carbon M2 or L1 printer (These files will not fit on M1 or M2d printers)
- IPA or a Smart Part Washer™ with VF 1 solvent
- UV curing unit (needs be at least 190 mm by 108 mm size to fit the bracket) some examples:
- APM LED UV-Cube II
- Dymax ECE 5000
- Opticure LED Cube
- Dreve PCU 90
At the moment, we have validated this design for our DPR 10 and UMA 90 materials. Our recommendation is to use DPR 10.
To order these Carbon materials, email email@example.com.
Carbon customers can access the .Carbon files and detailed post processing instructions by visiting the DLS™ Face Shield page on Carbon Academy.
Face Shield Assembly Instructions
The face shield has three different components:
- Bracket (3D-Printed)
- Shield (Clear PET)
- Strap (Rubber band or elastic band)
- Use the STL file to print the bracket using DPR 10 or UMA 90 material
- The design has three circular protrusions on the front to hang the shield in place and hooks on sides to fasten the strap
- We recommend PET sheets with thicknesses between .005” and .010”.
- We purchased PET sheets (size 10 ft x 40”) and used a laser cutter to create the rounded edges. You can order PET sheets from suppliers such as McMaster-Carr.
- If you know of additional sources with available inventory, please share with us at firstname.lastname@example.org so we can post it here.
- As an alternative to laser cutting, you can print this outline design on 8.5” x 11” paper and use that as a pattern to cut the PET sheet to size using scissors.
- We are using hole punches to punch 3 holes at the very top of the face shield to enable attachment with the 3D printed head bracket.
- Once cut to size, align the holes on the face shield to the 3D printed bracket.
- We are currently using elastic bands for their durability and comfort. These can be found here: https://www.mcmaster.com/3029t52
- The head strap is typically elastic. Alternative elastic bands may be used as long as they are latex free and ensure proper fit.
- Because of the emergency nature of production, actual materials used in each face shield may vary.
Re-Use of the Face Shield
Feedback from physicians and infection control groups suggests that the Face Shield product is suitable for reuse with appropriate cleaning in between patients (see “Cleaning the Face Shield”). Each hospital should determine appropriate use / reuse protocols based on a review of the product by the hospital’s Infection Control group.
Cleaning the Face Shield
Face shields delivered to facilities should be considered non-sterile. Consult the CDC for the latest guidance on disinfectants known to be effective against COVID-19. The following cleaning materials may be appropriate:
- Isopropanol (70%) wipe
The following are not compatible with DPR 10 and should not be used to clean face shields:
- Hydrogen peroxide vapor sterilization
- Soak in isopropanol or organic solvent
Carbon is not providing specific guidance with regard to pricing for the face shields. We encourage all production partners to work directly with local hospitals in the area to work towards providing such products at a fair and reasonable price.
Please read the Carbon Disclaimer. (PDF)