MPR vs TPU-Ether
Polymer · grade comparison
MPR and TPU-Ether are both polymer grades. TPU-Ether is the stronger of the two: tensile strength 45 MPa (6.53 ksi) against 9 MPa (1.23 ksi) for MPR, about 5.3 times as much. TPU-Ether is the more ductile: elongation 550% versus 300% for MPR, and TPU-Ether is harder (35 Shore D vs 24 Shore D). TPU-Ether is lighter (1.12 g/cm³ vs 1.2 g/cm³ for MPR) and TPU-Ether is stiffer (0.03 GPa vs 0.01 GPa). On the shop floor, TPU-Ether welds better (excellent vs very good).
MPRChoose it when the part sees heat.
TPU-EtherChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
MPR vs TPU-Ether: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer 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 polymer 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Flexural Modulus
Hardness, Shore A
Hardness, Shore D
Tear Strength
Compression Set (22 h, 70 °C)
Shear Modulus
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Melting Temperature (Tm)
Water Absorption (Saturation)
Refractive Index
Light Transmission
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Limiting Oxygen Index
Max Service Temperature (short-term)
Vicat Softening Point (B50)
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Volume Resistivity
Dissipation Factor (1 MHz)
Surface Resistivity
Comparative Tracking Index (CTI)
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Processing Melt Temperature (typ.)
Polishability
Melt Flow Rate
Same in both: Mold Temperature (typ.) 30°C86 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Embodied Water
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 0 MN·m/kg · Thermal Diffusivity 0.1 mm²/s
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | MPR | TPU-Ether |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
MPR vs TPU-Ether — frequently asked
Is TPU-Ether stronger than MPR?
Yes. TPU-Ether has a typical tensile strength of 45 MPa (6.53 ksi) against 9 MPa (1.23 ksi) for MPR — about 5.3 times as much.
Which is cheaper, MPR or TPU-Ether?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, MPR or TPU-Ether?
TPU-Ether. Its machinability rates fair (35/100) against poor (30/100) for MPR; for welding the order is TPU-Ether first (excellent, 90/100) then MPR (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in MPR and TPU-Ether 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.