mPPE compounds
Halogen-free flame-retardant mPPE: low density, dimensionally stable, hydrolysis resistant.
Example grade / typical values — to be corrected by GREENPOLYMER
Selection criteria
- Dimensional stability
- Hydrolysis resistance
- Flame retardancy
- GRN-PPE-N510Battery module brackets
mPPE (modified polyphenylene ether, commonly called PPO) is based on polyphenylene ether (PPE) blended with polystyrene and other components. It has low density, low water absorption, good dimensional stability, hydrolysis resistance and good electrical insulation. Halogen-free flame-retardant mPPE is commonly used for electrical parts of energy storage and PV equipment, battery module brackets, junction boxes and internal structures of telecom equipment.
GREENPOLYMER mPPE grades
Full list · 1 grade
| Grade | Key features | Suitable parts |
|---|---|---|
| GRN-PPE-N510 | Halogen-free flame-retardant mPPE | Battery module brackets, junction boxes, electrical housings, internal parts of telecom equipment |
Recycled-content versions (-R) can be customized.
Key properties
Typical values. Refer to the actual TDS.
| Item | Test standard | GRN-PPE-N510 |
|---|---|---|
| Density | ISO 1183 | 1.06–1.12 g/cm³ |
| MFR | ISO 1133 | 10–30 g/10 min (280 °C / 5 kg) |
| Tensile strength | ISO 527 | 50–65 MPa |
| Notched impact (23 °C) | ISO 179/1eA | 8–15 kJ/m² |
| HDT (1.80 MPa) | ISO 75 | 90–120 °C |
| Flammability (design target) | UL 94 | V-0 @ 1.5 mm |
Flammability ratings are design targets, tested to the UL 94 method (to be verified by GREENPOLYMER). Certificate to be uploaded.
Strengths and weak points of mPPE
| Strengths | Weak points |
|---|---|
| Low density, lighter parts | Poor resistance to some solvents (such as certain hydrocarbons and esters); stress cracking possible |
| Low water absorption, dimensionally stable | Moderate flow; long thin parts need evaluation |
| Hydrolysis resistant, suits damp heat | Moderate weathering; outdoor use needs extra evaluation |
| Halogen-free flame retardancy is relatively easy to achieve | Surface gloss and color range not as good as ABS |
| Stable dielectric properties | — |
mPPE or PC/ABS
| Situation | Recommended |
|---|---|
| Damp heat, hydrolysis resistance required | mPPE preferred |
| Lightweighting required | mPPE preferred |
| Cosmetic parts, high gloss or many colors needed | PC/ABS preferred |
| Frequent contact with cleaners and grease | Run chemical resistance tests for both |
| High low-temperature impact requirements | PC/ABS preferred |
For halogen-free flame-retardant PC/ABS, see PC/ABS.
Processing advice
Typical values. Refer to the actual TDS.
- Drying100–110 °C, 2–4 h
- Melt temperature260–300 °C
- Mold temperature70–100 °C
- Injection speed
- Medium to fast; fast for thin-wall parts
- Residence time
- As short as possible; avoid long times at high temperature for flame-retardant grades
- Venting
- Improve venting to reduce burn marks and mold deposits
Full table
| Item | Recommended |
|---|---|
| Drying | 100–110 °C, 2–4 h |
| Melt temperature | 260–300 °C |
| Mold temperature | 70–100 °C |
| Injection speed | Medium to fast; fast for thin-wall parts |
| Residence time | As short as possible; avoid long times at high temperature for flame-retardant grades |
| Venting | Improve venting to reduce burn marks and mold deposits |
Design points
Avoid contact with incompatible chemicals
If the part will touch lubricants, cleaners or adhesives, run chemical stress cracking tests first.
Control internal stress
A higher mold temperature helps reduce internal stress.
Leave strain margin on screw bosses and snap fits
Keep walls no thinner than the test thickness of the material's flammability rating
FAQ
Are mPPE and PPO the same material?
They refer to the same class of material. This page writes mPPE (commonly called PPO): the base resin is polyphenylene ether (PPE), and the modified material is called mPPE.
Can mPPE be used in battery packs?
mPPE is often used for battery module brackets and electrical parts. It depends on temperature, flammability, insulation and chemical resistance requirements; please send us your specification.
Related content
- Applications: New energy and energy storage | ICT and security
- Article: Halogen-free and fluorine-free flame retardants
Contact us
Tell us the part name, flammability rating and thickness, operating temperature and humidity, chemicals in contact and the expected volume. Phone +86 18822892298 | Email hello@greenpolymer.com