MPPE foam molding
// If your part sits next to a battery, the flame rating usually comes from an additive. MPPE does not need one: modified polyphenylene ether is halogen-free UL 94 V-0 on its own, with a glass transition above 130°C and a dielectric constant low enough for antenna housings. It is also the heaviest and most expensive material we mold — pick it when the rating and the heat are non-negotiable.
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 MPPE 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 | 100–286 kg/m³ · 285 (3.5×) / 200 (5×) / 140 (7×) / 100 (10×) | ✅ |
| Flame rating | UL 94 V-0 — the first bead foam worldwide to hold it, non-halogen formulation | ✅ |
| Heat resistance | Tg above 130°C; HDT ≈90°C (under load, not a service limit) | ✅ |
| Measured heat stability | 7× sample at 100°C for 22 h — volume change under 1% | ✅ |
| Minimum service temperature | −100°C | ✅ |
| Compression @10% | 1100–3200 kPa, derived from the density band | 📐 |
| Thermal conductivity | 0.035–0.05 W/(m·K) — published qualitatively as high-grade insulation | 📐 |
| Electrical | Excellent insulation, very low dielectric constant | ✅ |
| Tensile / elongation / tear / compression set / water absorption / hardness | No public figure — we request it with your enquiry | ⬜ |
Reference commercial grades
| Grade | Supplier | Notes |
|---|---|---|
| SunForce BE1 | Asahi Kasei | UL 94 V-0 certified at 3 mm thickness and above |
| SunForce BE2 | Asahi Kasei | UL 94 V-0 certified at 5 mm thickness and above |
Battery-pack carriers and blast-shield insulation
The rating and the heat come from the material, not a coating.
5G base-station antenna housings
A low dielectric constant keeps the radio pattern clean.
Composite core for prepreg and RTM
Designed for processes that hold above 100°C.
Why we can run it
// Very high melt point and high process pressure — this is the family a standard EPP machine cannot run at all.