EVA Foam vs Poron
Polymer · grade comparison
EVA Foam and Poron are both polymer grades. EVA Foam is the more ductile: elongation 200% versus 150% for Poron. EVA Foam is lighter (0.06 g/cm³ vs 0.32 g/cm³ for Poron) and EVA Foam is stiffer (0.01 GPa vs 0 GPa).
EVA FoamChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PoronChoose it when the part sees heat.
EVA Foam vs Poron: 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
Elongation at Break
Compressive Strength
Compressive Modulus
Shear Strength
Hardness, Shore A
Compression Set (22 h, 70 °C)
Same in both: Poisson's Ratio 0.3 · Tensile Strength (Ultimate) 1 MPa0.15 ksi · Tear Strength 2 kN/m8.6 lbf/in
Physical
Density and transition temperatures.
Density
Melting Temperature (Tm)
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
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Vicat Softening Point (B50)
Limiting Oxygen Index
Max Service Temperature (short-term)
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Volume Resistivity
Surface Resistivity
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
Polishability
Mold Shrinkage
Melt Flow Rate
Processing Melt Temperature (typ.)
Mold Temperature (typ.)
Same in both: Formability (cold) 90 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
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 | EVA Foam | Poron |
|---|---|---|
| Default condition | Closed Cell | Standard |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both are offered for Injection molding. Both take the same 5 finishes: Chrome Plating (Plastic), EMI Shielding Coating, Soft Touch Coating, Spray Painting, UV Coating.
EVA Foam vs Poron — frequently asked
What is the difference between EVA Foam and Poron?
EVA Foam and Poron are both polymer grades. EVA Foam is the more ductile: elongation 200% versus 150% for Poron. EVA Foam is lighter (0.06 g/cm³ vs 0.32 g/cm³ for Poron) and EVA Foam is stiffer (0.01 GPa vs 0 GPa).
Which is cheaper, EVA Foam or Poron?
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, EVA Foam or Poron?
EVA Foam. Its machinability rates excellent (85/100) against very good (80/100) for Poron.
Ready to make it?
Upload a CAD file and FabDigit prices the part in EVA Foam and Poron 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.