E-PET foam molding
// Foamed polyester beads give you the shear and compression strength a structural core needs, a shape that survives 168 hours at 180°C, and a V-0 flame grade — from resin that can be up to 100% recycled PET. If your program carries both a stiffness target and a recycled-content target, this is the one material here that answers both at once.
The figures on this page are published industry and supplier values for this material family, not measured DBM product data — we do not have our own grade-level test results for E-PET yet. They are accurate enough to size a part and to rule options in or out. Final numbers are confirmed by us in writing against your part before you commit to anything.
| Property | Value | Source |
|---|---|---|
| Molded density | 150 / 200 / 300 kg/m³ | ✅ |
| Compression strength @5% | 0.9–2.6 MPa | ✅ |
| Dimensional stability | 180°C × 168 h — change within ±1% | ✅ |
| Long-term service temperature | about 110°C | 📐 |
| Flame rating | Standard grade UL 94 V-2 (5 mm); high-FR grade UL 94 V-0 (11 mm) | ✅ |
| Chemical resistance | Resists oil, acid, alkali and solvents, per the resin supplier | ✅ |
| Thermal conductivity | 0.038–0.059 W/(m·K) | ✅ |
| Recycled and bio content | BIO grade 25% biomass; RNW grade uses recycled resin; core material up to 100% recycled PET | ✅ |
| Tensile / elongation / tear / compression set / water absorption / hardness | No public figure for bead-molded parts — we request it with your enquiry | ⬜ |
Reference commercial grades
| Grade | Supplier | Notes |
|---|---|---|
| ST-Eleveat | Sekisui Plastics | Polyester foam beads — runs on standard EPS molding equipment |
| ArmaPET / Kerdyn | Armacell / Gurit | Board-form core, 65–300 kg/m³ — reference only, not bead data |
Rail vehicle sandwich cores
Stiffness per unit weight, with a fire grade to match.
Wind-blade and building sandwich cores
Low resin uptake keeps the lay-up weight down.
Recycled-content lightweighting programs
A stiffness target and a recycled target in one material.
Why we can run it
// A note on published data: most public E-PET figures describe board-form core, not bead-molded parts. The values above are the bead-foam supplier figures, and anything sourced from board data is flagged as reference only.