Somos 8120

Description

DSM Somos^® 8120 is a high-speed liquid photopolymer that produces flexible, high-impact-strength, accurate parts using stereolithography machines. It has a wide processing latitude and excellent tolerance to a wide temperature and humidity range during and after build. This material is especially useful in functional applications where flexibility and impact-strength are critical requirements (e.g., plastic bottles, packaging, automobile panels, electronic enclosures, medical products and snap-fit parts).

Application

Somos^® 8120 photopolymer is used in the solid imaging process to build three-dimensional parts. It is intended to be used with a layer thickness of approximately 0.10 mm to 0.25 mm (0.004 inch to 0.010 inch). After part formation via UV laser exposure, the excess resin is removed by rinsing with a solvent such as isopropyl alcohol (IPA or isopropanol), TPM or propylene carbonate. The part is post-cured by UV fluorescent light

Physical Properties – Liquid

Appearance	Transparent Amber
Viscosity	~600 cps at 30° C
Density	~1.11 g/cm³

Optical Properties at 355 nm

Initial values for determining working curve for a Solid State laser operating at
355 nm

*E_c*	6.75 mJ/cm²
[critical exposure]
*D_p*	*0.155 mm (6.1 mil)*
[slope of cure-depth vs. ln(E) curve]
E₅	15.3 *mJ/cm²*
[exposure which produces a pane 0.127 mm (5 mils) thick]
*E₁₀*	35 *mJ/cm²*
[exposure which produces a pane 0.254 mm (10 mils) thick]