PP filament: the numbers
Polypropylene. Typical uses: living hinges, chemical containers, lab ware, lightweight floats.
0.9 g/cm³density (0.88–0.92)
462 mper kg at 1.75 mm
2.16 gper metre
220–250 °Cnozzle
90–110 °Cbed
2%linear shrinkage
$45typical per kg ($30–70)
100 °Cmax service temperature
Recommendedenclosure
60 °C · 6 hdrying (low hygroscopic)
5/5difficulty · medium strength · semi-flexible
Printing tips
- Almost nothing sticks to it except PP: use PP packing tape or a PP sheet on the bed.
- Very high shrinkage; use a wide brim and an enclosure.
- Lightest common filament, so a 1 kg spool goes about 35% further than PLA.
Grams ↔ metres for PP
What a PP print costs
Questions about PP
What temperature should I print PP at?
Nozzle 220–250 °C and bed 90–110 °C are the usual range. Start in the middle and tune with a temperature tower; an enclosure helps with larger parts.
How many metres of PP are in a 1 kg spool?
About 462 m at 1.75 mm (density 0.9 g/cm³). One metre weighs 2.16 g.
Does PP need drying?
Rarely for fresh spools. PP absorbs moisture slowly; dry at 60 °C for 6 hours if it has been open for months or prints with unexpected stringing.
How much does PP shrink?
About 2% linear. To compensate, scale X and Y by 102.04% in the slicer, or measure a test print and use the shrinkage calculator.
Sources: en.wikipedia.org, storage.googleapis.com, filament2print.com