PU-PMMA-like vs PU-PP-like
Polyurethane · grade comparison
PU-PMMA-like and PU-PP-like are both polyurethane grades. PU-PMMA-like is the stronger of the two: yield strength 58 MPa (8.41 ksi) against 24 MPa (3.48 ksi) for PU-PP-like, about 142% more; tensile strength follows at 65 MPa (9.43 ksi) vs 28 MPa (4.06 ksi). In exchange, PU-PP-like is the more ductile: elongation 70% versus 10% for PU-PMMA-like, and PU-PMMA-like is harder (83 Shore D vs 72 Shore D). PU-PP-like is lighter (1.08 g/cm³ vs 1.13 g/cm³ for PU-PMMA-like) and PU-PMMA-like is stiffer (2.5 GPa vs 1 GPa). On the shop floor, PU-PMMA-like machines more easily (very good vs good).
PU-PMMA-likeChoose it when strength drives the design, or when the part is machined in volume.
PU-PP-likeChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PU-PMMA-like vs PU-PP-like: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
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
Same in both: Poisson's Ratio 0.4
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)
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 · Max Service Temperature (continuous) 70°C158 °F · Min Service Temperature -30°C-22 °F · Limiting Oxygen Index 20%
Electrical
Conductivity and insulation.
Dielectric Constant (1 MHz)
Surface Resistivity
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Strength 18 kV/mm457 V/mil · Dissipation Factor (1 MHz) 0.04 · Volume Resistivity 1×10¹⁴ Ω·cm
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)
Polishability
Mold Shrinkage
Processing Melt Temperature (typ.)
Mold Temperature (typ.)
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Same in both: Thermal Diffusivity 0.1 mm²/s · Thermal Shock Resistance Index 0
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-PP-like |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PU-PMMA-like vs PU-PP-like — frequently asked
Is PU-PMMA-like stronger than PU-PP-like?
Yes. PU-PMMA-like has a typical yield strength of 58 MPa (8.41 ksi) against 24 MPa (3.48 ksi) for PU-PP-like — about 142% more. Tensile strength is 65 MPa (9.43 ksi) vs 28 MPa (4.06 ksi).
Which is cheaper, PU-PMMA-like or PU-PP-like?
Both sit in the same relative cost tier ($$$$, 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-PP-like?
PU-PMMA-like. Its machinability rates very good (75/100) against good (55/100) for PU-PP-like; for welding the order is PU-PP-like first (not recommended, 10/100) then PU-PMMA-like (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PU-PMMA-like and PU-PP-like 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.