Rebond Foam vs RIM PU Foam
Polymer · grade comparison
Rebond Foam and RIM PU Foam are both polymer grades. RIM PU Foam is the stronger of the two: yield strength 8 MPa (1.16 ksi) against 0.02 MPa (0.0022 ksi) for Rebond Foam, about 533 times as much; tensile strength follows at 12 MPa (1.74 ksi) vs 0.15 MPa (0.0218 ksi). RIM PU Foam is the more ductile: elongation 130% versus 60% for Rebond Foam. Rebond Foam is lighter (0.08 g/cm³ vs 0.6 g/cm³ for RIM PU Foam) and RIM PU Foam is stiffer (0.22 GPa vs 8×10⁻⁴ GPa). On the shop floor, Rebond Foam machines more easily (very good vs good).
Rebond FoamChoose it when weight is the constraint, or when the part is machined in volume.
RIM PU FoamChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Rebond Foam vs RIM PU Foam: 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)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Shear Strength
Hardness, Shore A
Tear Strength
Compression Set (22 h, 70 °C)
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Hardness, Shore D
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Max Service Temperature (continuous)
Min Service Temperature
Limiting Oxygen Index
Max Service Temperature (short-term)
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Electrical
Conductivity and insulation.
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Surface Resistivity
Comparative Tracking Index (CTI)
Same in both: Electrical Resistivity 1×10¹⁰ Ω·m3.94×10¹⁷ µΩ·in · Volume Resistivity 1×10¹² 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)
Typical Recycled Content
Embodied Water
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
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 | Rebond Foam | RIM PU Foam |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Rebond Foam vs RIM PU Foam — frequently asked
Is RIM PU Foam stronger than Rebond Foam?
Yes. RIM PU Foam has a typical yield strength of 8 MPa (1.16 ksi) against 0.02 MPa (0.0022 ksi) for Rebond Foam — about 533 times as much. Tensile strength is 12 MPa (1.74 ksi) vs 0.15 MPa (0.0218 ksi).
Which is cheaper, Rebond Foam or RIM PU Foam?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Rebond Foam or RIM PU Foam?
Rebond Foam. Its machinability rates very good (80/100) against good (55/100) for RIM PU Foam; for welding the order is Rebond Foam first (poor, 15/100) then RIM PU Foam (not recommended, 10/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Rebond Foam and RIM PU Foam 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.