PU-PMMA-like vs PU-Rubber-like-ShoreA
Polyurethane · grade comparison
PU-PMMA-like and PU-Rubber-like-ShoreA are both polyurethane grades. PU-PMMA-like is the stronger of the two: tensile strength 65 MPa (9.43 ksi) against 9 MPa (1.31 ksi) for PU-Rubber-like-ShoreA, about 7.2 times as much. In exchange, PU-Rubber-like-ShoreA is the more ductile: elongation 380% versus 10% for PU-PMMA-like, and PU-PMMA-like is harder (83 Shore D vs 22 Shore D). PU-Rubber-like-ShoreA is lighter (1.09 g/cm³ vs 1.13 g/cm³ for PU-PMMA-like) and PU-PMMA-like is stiffer (2.5 GPa vs 0.01 GPa). On the shop floor, PU-PMMA-like machines more easily (very good vs poor).
PU-PMMA-likeChoose it when strength drives the design, or when the part is machined in volume.
PU-Rubber-like-ShoreAChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PU-PMMA-like vs PU-Rubber-like-ShoreA: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polyurethane grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all polyurethane grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
PU-PMMA-likePU-Rubber-like-ShoreA
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Hardness, Rockwell R
Hardness, Shore A
Tear Strength
Compression Set (22 h, 70 °C)
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Refractive Index
Light Transmission
Thermal
How each material carries heat and how hot it can run.
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Max Service Temperature (short-term)
Same in both: Thermal Conductivity 0.2 W/m·K0.12 BTU/hr·ft·°F · Min Service Temperature -30°C-22 °F · Limiting Oxygen Index 20%
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Volume Resistivity
Surface Resistivity
Same in both: Dielectric Strength 18 kV/mm457 V/mil
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
UV / Weathering Resistance
Same in both: Corrosion Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Polishability
Mold Shrinkage
Processing Melt Temperature (typ.)
Same in both: Mold Temperature (typ.) 65°C149 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Same in both: Embodied Energy (primary production) 105 MJ/kg45,142 BTU/lb · Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Shock Resistance Index
Same in both: Thermal Diffusivity 0.1 mm²/s
Strength versus weight
Yield strength against density for every polyurethane grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | PU-PMMA-like | PU-Rubber-like-ShoreA |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PU-PMMA-like vs PU-Rubber-like-ShoreA — frequently asked
Is PU-PMMA-like stronger than PU-Rubber-like-ShoreA?
Yes. PU-PMMA-like has a typical tensile strength of 65 MPa (9.43 ksi) against 9 MPa (1.31 ksi) for PU-Rubber-like-ShoreA — about 7.2 times as much.
Which is cheaper, PU-PMMA-like or PU-Rubber-like-ShoreA?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, PU-PMMA-like or PU-Rubber-like-ShoreA?
PU-PMMA-like. Its machinability rates very good (75/100) against poor (25/100) for PU-Rubber-like-ShoreA; for welding the order is PU-PMMA-like first (not recommended, 5/100) then PU-Rubber-like-ShoreA (not recommended, 0/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PU-PMMA-like and PU-Rubber-like-ShoreA side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.