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Robusta G

Material Overview

Robusta G has all the benefits and convenience associated with Formula L1 but is significantly stronger, which opens up an additional range of uses. It is best used for parts where toughness is a key requirement, or for master models for vacuum casting. Its texture and bright white color is very similar to that of ABS and other thermoplastics, making it ideal for prototyping and functional testing. 

 

Advantages

Very strong and durable
Convenient to clean and finish
Highly detailed
Accurate

Applications

Functional prototypes that need to be tough
Snap-fit models
Jigs and fixtures

Specifications

Liquid Properties

Measurement Condition Value
Viscosity @ 26 °C (78.8 °F) 230~290 cps
Color White  
Density @ 25 °C (77 °F) 1.13 g/cm³

Optical Properties

Ec(critical exposure) Dp(slop of cure-depth vs.ln(E) curve)
9.5~10.5 mJ/cm2 0.13-0.145

Mechanical Properties (90 Minutes UV Postcure)

ASTM Method Property Description Value
ASTM D 638 Tensile Modulus 2,489-2,595 MPa
ASTM D 638 Tensile Strength at Break 36-53 MPa
ASTM D 638 Elongation at Break 15 -25%
ASTM D 648 @66PSI Heat Deflection Tempertature 35~48 ℃
ASTM D 790 Flexural Strength 63- 70 Mpa
ASTM D 790 Flexural Modulus 2,592-2,675 Mpa
ASTM D 256 Izod Impact (Notched) 45 - 60 J/m
ASTM D 2240 Hardness Shore D 75~85

Download ProtoFab Material Selection Guide 2018