MPR vs TPU-Ester
Polymer · grade comparison
MPR and TPU-Ester are both polymer grades. TPU-Ester 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-Ester is the more ductile: elongation 500% versus 300% for MPR, and TPU-Ester is harder (40 Shore D vs 24 Shore D). TPU-Ester is stiffer (0.05 GPa vs 0.01 GPa) and MPR runs hotter in service (120°C vs 80°C continuous). On the shop floor, TPU-Ester welds better (excellent vs very good) and TPU-Ester sits in a lower cost tier (standard, $$) than MPR (premium, $$$).
MPRChoose it when the part sees heat.
TPU-EsterChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
MPR vs TPU-Ester: 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
Bulk 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
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)
Same in both: Specific Heat Capacity 1,700 J/kg·K0.41 BTU/lb·°F
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)
Same in both: Specific Stiffness (E / density) 0 MN·m/kg · Thermal Diffusivity 0.1 mm²/s · Thermal Shock Resistance Index 1
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-Ester |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
MPR vs TPU-Ester — frequently asked
Is TPU-Ester stronger than MPR?
Yes. TPU-Ester 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-Ester?
TPU-Ester is the lower-cost material: it sits in the standard tier ($$) while MPR is premium ($$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, MPR or TPU-Ester?
TPU-Ester. Its machinability rates fair (35/100) against poor (30/100) for MPR; for welding the order is TPU-Ester first (excellent, 85/100) then MPR (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in MPR and TPU-Ester 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.