VICI provides unique multi-layer films for specialty uses which can be incorporated into windows for 3D printing or fabricated in specialty shapes. Our two-layer film is patent-pending, and a provisional patent has been filed for our film with three or more layers. (Permeability is expressed here in Barrer units.)
Our two-layer Teflon™ AF film products are composed of:
- A first layer made from material with permeability of at least 100 Barrer, e.g., Teflon™ AF 2400.
- A second layer is made from material with O2 permeability of at least 10 Barrer, e.g., polymethyl pentene.
Three-Layer Composite Film
Our three-layer film has a symmetrical structure that provides stable expansion properties that are beneficial for certain applications such as 3D printing. The composite film is composed of two outer layers of amorphous perfluoropolymer sandwiching a less permeable layer in between.
Additive manufacturing (aka 3D printing) with the CLIP (Continuous Liquid Interface Production) process relies on photopolymerization. The process requires a window that is transparent to UV light and covered with an oxygen-permeable film. The optical clarity and gas permeability of films made with Teflon™ AF are preferred for this application.
VICI Metronics offers two types of windows:
- Monolithic Teflon™ AF Windows (films) – 50 µm to 250 µm thick, fast printing.
- Composite Teflon™ AF Windows (films) – 75 µm and 150 µm thick, lower priced.
To make these products, VICI polishes Teflon™ AF disks to a 60/40 scratch-dig to ensure quality windows with a high degree of parallelism.
Learn more about Teflon™ AF.