Rheology of our 3Dresyns

Our 3Dresyns have been specifically designed to avoid or minimise the use of highly irritant low-viscosity monomers, reducing as much as possible potential safety and health hazards while maintaining excellent printability and performance.

SLA, DLP & LCD 3D resins

From a rheological (viscosity) perspective, our SLA, DLP & LCD 3Dresyns have been carefully formulated to keep pigments and colors in stable suspension for long periods. They cover a very broad viscosity range depending on the targeted performance and application.

Some formulations exhibit ultra-low viscosities, such as <20 mPas at 20ºC (close to water at 1 mPas), while others have been intentionally designed with high viscosities up to ~10,000 mPas at 20ºC to maximise mechanical strength, dimensional stability, and biocompatibility.

Several of our highest performance and most biocompatible materials, such as 3Dresyns "like" best engineering plastics , are intentionally formulated with higher viscosity to enhance strength and safety.

These relatively high-viscosity resins are available in different viscosity versions:

• HV – Higher Viscosity versions: increased mechanical properties and biocompatibility, but higher peeling forces (adhesion on FEP or PDMS).
  • HV versions are ideal for printers equipped with heating systems (>25ºC).
• LV – Lower Viscosity versions: reduced peeling force, with slightly lower mechanical properties and biocompatibility.
  • LV versions can typically be printed without heating if ambient temperature is 20–25ºC.
  • Pre-heating or in-print heating further reduces peeling forces.

Learn more about the benefits of printing with heated printers . For a small investment (~50 €), a heating unit can often be retrofitted to existing printers.

Inkjet resins

Inkjet 3Dresyns are supplied with extremely low viscosities: <20 mPas at 70ºC and <15 mPas at 80ºC. Our colored Inkjet 3Dresyns for both MultiJet and PolyJet systems show excellent long-term stability with no pigment settling.

Reactive bio diluents

Several 3Dresyn reactive thinners and diluents have been developed to reduce viscosity when required. In most cases, they are not necessary for printing, but they are useful for users accustomed to working with low-viscosity unsafe monomer-based resins .

• Thinner 3Dresyn RHDT Bio : rigid biocompatible diluent designed to increase HDT (>160ºC) while reducing viscosity. Very low viscosity (<150 mPas).
• Thinner 3Dresyn R Bio : rigid biocompatible reactive diluent with HDT >110ºC and ultra-low viscosity (<15 mPas).
• Thinner 3Dresyn H Bio : hard bio-based diluent (<150 mPas) for Shore D <80 resins, increasing hardness and cure speed even at <10% addition.
• Thinner 3Dresyn SFT MF Bio : super fast & tough monomer-free diluent (<300 mPas) to boost cure speed, especially for low-power printers.
• Thinner 3Dresyn TF Bio : tough & foldable diluent with ultra-low viscosity (<20 mPas) to enhance toughness and flexibility.
• Thinner 3Dresyn E : elastic diluent (<10 mPas) designed to reduce viscosity while increasing elasticity and flexibility without sacrificing twisting resistance or foldability.

Note: Viscosity units are expressed in centipoise (cps) or milliPascal-second (mPas). 1 cps = 1 mPas.