White Paper

Creating Silicone Medical Devices

This guide aims to help the user decide on the best method of silicone part production for their intended use, and provides step-by-step instructions for both printing with Silicone 40A, and molding silicone using SLA 3D printed tooling (including two-part injection molds, overmolds, and compression molds).

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  1. Introduction
  2. About Silicones
  3. Skin, Mucous Membrane, and Food Safety
  4. Durometer Rating Scale
  5. Deciding to Print or Mold
  6. Overview of Printing With Silicone 40A
  7. Overview of Silicone Molding 3D Printed Tooling
  8. Compatibility of 3D Printing Resins and Silicones
  9. Additional Best Practices
  10. Selecting a Mold Type
  11. Silicone Molding Step-By-Step
  12. Silicone Printing Step-By-Step
  13. Medical Customer Case Studies
  14. Conclusion

1. Introduction

Soft, rubbery parts have applications across healthcare, from custom hearing aids and soft anatomical models to prosthetics and other wearables. Designers can incorporate robust, bendable, and stretchable true silicone parts into their portfolios using two methods: printing directly with Silicone 40A Resin, and molding silicone using SLA 3D printed tooling.

2. About Silicones

Silicones are a class of polymers that contain the elements silicon and oxygen in their molecular chain, and transform from a gel or liquid to a highly flexible and stretchable solid after curing. They are versatile materials with high-performance properties such as excellent electric insulation, heat resistance, chemical stability, high tear strength, and biocompatibility, making them attractive for highly-demanding industries like healthcare.

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