PP vs PEI
How PP and PEI compare, from typical settings across every filament we list.
- PP is easier to print and more flexible; PEI is stiffer, more heat resistant and better outdoors.
- PEI typically prints about 135 °C hotter at the nozzle.
- PEI typically prints about 50 °C hotter on the bed.
- PP is less dense, so a 1 kg spool holds about 135 m more 1.75 mm filament.
- There are 28 PP filaments in 50 colours, and 17 PEI filaments in 24 colours.
At a glance
Our rating, out of 5| PP | PEI | |
|---|---|---|
| Ease of printing | Easier to print | |
| Toughness | ||
| Stiffness | Stiffer | |
| Heat resistance | More heat resistant | |
| Outdoor and UV | Better outdoors | |
| Flexibility | More flexible | |
| Setup | No enclosure or special setup needed | Needs an enclosure, Dry before printing, Needs ventilation |
| PP | PEI | |
|---|---|---|
| Full name | Polypropylene | Polyetherimide |
| Filaments listed | 28 | 17 |
| Brands | 19 | 10 |
| Colours | 50 | 24 |
| Nozzle temperature | 210–240 °C | 340–380 °C |
| Bed temperature | 80–100 °C | 120–160 °C |
| Density | 0.90 g/cm³ | 1.27 g/cm³ |
| Length of 1 kg (1.75 mm) | about 462 m | about 327 m |
| Max drying temperature | 60 °C | – |
Temperatures are medians across each material's filaments, rounded to 5 °C. Always check the maker's settings for a specific filament.
Brands that make both
8 brands make both PP and PEI.