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3D Printing Progress
Posted on July 26, 2021 by  & 
External Company Press Release

Revolutionizing the Orthopedic Sector Thanks to 3D Printing

3D printable silicone for custom-made prostheses
COP Chimie is a French SME based in the Vercors region which has been developing materials for the orthopedic industry for over 30 years. Thanks to its Research and Development laboratory, as well as its synthesis unit, the company has succeeded in developing a printable silicone elastomer certified for skin contact. This new soft and flexible material makes it possible to produce orthoses and external prostheses by 3D printing. This innovative solution in the field of orthopedic devices allows for faster manufacturing of custom-made medical devices. This change will greatly facilitate the life of many disabled people who wear these devices on a daily basis.

The benefits of silicone 3D printing

Silicones, generally in the form of oils or translucent elastomers that can be easily colored, are appreciated for their resistance to temperature, their flexibility, their hydrophobic and texturing character, in addition to their chemical stability which makes them suitable for the physiological environment in particular. Thus, silicones are used in the composition of numerous products and objects with a wide range of uses: hygiene and cleaning products, seals, industrial or food molds, coatings and paints, lubricants and greases, prostheses, toys, etc. For further information see the IDTechEx report on 3D Printed Materials Market 2020-2030: COVID Edition.
In the medical field, for example, additive manufacturing of silicone makes it possible to produce custom-made devices without the need for manual impressions or moulding, thus reducing manufacturing time and costs. It also makes it possible to include voids and to vary the filling rate of structures to lighten them or modify their properties, for example:
  • lower the hardness,
  • increase resilience,
  • allow for better damping,
  • add anisotropy to the printed object, - increase the mechanical properties, - increase the exchange surfaces...

COPSIL3D, the printable RTV silicone fully compatible with skin contact

Supported by thesis work in partnership with IMP/INSA in Lyon, COP has developed a silicone with a specific consistency that allows layer by layer deposition of liquid silicone without collapse. The hardness and reactivity of COPSIL3D can be adapted to the type of structure to be built. The cross-linking (the curing of the elastomer), catalyzed by platinum, takes place at room temperature once the two parts have been mixed in the static mixer at the print head. It can be accelerated by the addition of energy.
Printed COPSIL3D elastomers have the same mechanical properties as a cast silicone, have no shrinkage or odor and are compatible with skin contact applications (ISO 10993-5 certification). They are ideal for the manufacture of flexible parts with complex designs or small series, for example for prototyping.
In order to democratize this technology, COP Chimie is partnering with F3DF, specialists in 3D printing, to offer training on 3D printing of silicones.
More information on the website:
Press contact: JBK Corporation
Source and top image: JBK Corporation~
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