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Application · Plastic Modification

3D Printing Filament Pellets: PLA, ABS, PETG

Filament pellets need two things that masterbatch lines do not: a tight pellet-size distribution and filtration fine enough that a 0.4 mm nozzle never sees a particle. A reference 3d printing filament pellets page from Kerke.

Updated 6 November 2026

Output 100–500 kg/h

Line type Co-rotating twin screw KTE

Basis parameter table + material trial

3D Printing Filament Pellets — workshop photo 1, Kerke workshop, Nanjing

3D Printing Filament Pellets — workshop photo 2, Kerke workshop, Nanjing

3D Printing Filament Pellets — workshop photo 3, Kerke workshop, Nanjing

3D Printing Filament Pellets — workshop photo 4, Kerke workshop, Nanjing

3D Printing Filament Pellets — workshop photo 5, Kerke workshop, Nanjing

3D Printing Filament Pellets — workshop photo 6, Kerke workshop, Nanjing

Running video — 3D Printing Filament Pellets, Kerke workshop

Quick answer

3D printing materials (PLA, ABS, PETG, TPU pellets for filament extrusion) need pellet diameter tolerance within ±0.1 mm and low dust, produced on a twin screw with L/D 40–44, precise temperature control and strand pelletizing. Output 100–500 kg/h.

150–200mesh filtration

±0.1 mmpellet tolerance

50–60%of resin-line output

Workshop photos and a running video — shot on our own lines, not stock images.

What sets the limit

Resin and masterbatch are metered, gently melted to protect molecular weight, devolatilized, filtered through a fine screen pack and strand-pelletized with a sharp die-face angle for clean cuts.

**Table 1.** Key parameters for 3d printing filament material pelletizing line. Reference values — confirm on a material trial.
Parameter	Value / range
Materials	PLA / ABS / PETG / TPU / PA
Pellet tolerance	±0.1 mm diameter, low dust
L/D	40–44
Temperature	Precise zones, vacuum devolatilization
Output (reference)	100–500 kg/h
Model	KTE-36B, KTE-50B

Output figures are measured on the reference material stated above. Filler grade, bulk density and moisture move output by ±15% — that is why every quotation we issue is tied to a trial report.

Process flow, step by step

FeedingLoss-in-weight dosing of polymer and filler; side feeder or liquid injection where the formulation needs it.
Melting and dispersingScrew geometry with 45°/90° kneading blocks; barrel profile Precise zones, vacuum devolatilization.
DevolatilizationVacuum vent at −0.06 to −0.09 MPa removes moisture and volatiles before the die.
Pressure build-upThrottle or discharge section stabilises die pressure; a melt pump where gauge control matters.
Pelletizing and packingdie-face or strand pelletizing, see the pelletizing page; then centrifugal dryer, vibrating screen and bagging.

Equipment configuration

**Table 2.** What the line is made of, and why each part is specified that way.
Stage	Equipment	Why this choice
Main machine	Co-Rotating Twin Screw Extruder	Architecture follows the filling level and the mixing duty, not the required tonnage.
Screw geometry	Building-block elements, W6Mo5Cr4V2, bimetallic liner	Wear package for abrasive filler; mixing blocks only where dispersion demands them.
Feeding	Loss-in-weight feeder, side feeder where needed	Recipe accuracy: ±0.5% short term on the weighed component.
Pelletizing	Pelletizing system	Chosen by polymer and filler ceiling — water contact is the deciding column.
Downstream	Centrifugal dryer, vibrating screen, bagging	Fines below 2% and moisture below the specification of your downstream process.

Output by model

**Table 3.** Co-rotating twin screw KTE — reference output. Full range on the machine page.
Model	Dia. (mm)	Speed (rpm)	Motor (kW)	Torque (N·m)	Output (kg/h)
KTE-50B	50.5	500–600	55–75	2×525	80–200
KTE-50D	50.5	300–800	75–90	2×860	100–300
KTE-52B	51.4	500–600	55–75	2×720	80–200
KTE-52D	51.4	500–600	75–110	2×1050	100–400
KTE-65B	62.4	500–600	90–110	2×860	200–450
KTE-65D	62.4	300–800	132–160	2×1530	350–600
KTE-75B	71	500–600	132–160	2×1530	300–800
KTE-75D	71	300–800	200–315	2×2100	500–1000
KTE-85B	85	500–600	220–315	2×2100	550–1000
KTE-95B	93	500–600	250–315	2×3000	800–1500
KTE-95D	93	500–800	315–500	2×4800	1000–2000
KTE-135B	135	500–600	315–500	2×4800	1500–3000
KTE-135D	135	500–800	500–1000	2×7800	1500–4000

Three mistakes that cost the most

1. Aggressive shear degrades PLA and the filament foams when printed.

Aggressive shear degrades PLA and the filament foams when printed.

2. Dull cutter blades produce tails and dust that jam filament extruders downstream.

Dull cutter blades produce tails and dust that jam filament extruders downstream.

3. No melt filtration before pelletizing

No melt filtration before pelletizing — skip the screen changer and every gel becomes a nozzle blockage at the customer's printer, billed to you.

FAQ

Can you guarantee ±0.1 mm pellets?

With a properly maintained strand pelletizer and a sharp die, yes for 2–3 mm pellets. We confirm the value on your material in a trial.

Do I need food-grade or medical-grade design?

Not for standard filament. For medical filament the line needs a cleanable design and documented material traceability.

What output can you guarantee for this application?

The reference band is 100–500 kg/h, measured on the stated material. We quote a guaranteed figure only after a trial on your own material, because filler grade, bulk density and moisture move output by ±15%.

Can we run our material before ordering?

Yes — send 25–50 kg. We return pellets, a running video and a report with temperatures, screw speed, feeder settings and output per hour. The trial is free; you cover the freight.

What is the delivery time?

30–45 working days for standard configurations, 45–70 for custom screw geometry and ODM work. Voltage and frequency are built for the destination country.

Where these numbers come from

Parameters are taken from the Kerke product parameter table and the product master data sheet, and cross-checked against commissioning records for lines in the same application. Formulations and temperature windows are typical industry values, not a recommendation for your specific compound — every figure marked reference must be confirmed on a material trial before it becomes a contractual number.

Reviewed by the Kerke process team, Nanjing. Page updated 6 November 2026.

Tell us your material — we will tell you the line

Send 25–50 kg and we run it on our lab extruder: pellets, running video and a capacity report back in 3–7 days.

Get a quote Send material for trial

3d printing filament pellets — the short version

Note on 3d printing filament pellets: the numbers above are reference ranges from Kerke's own trial runs, not catalogue promises. Screw geometry, wear package and pelletizing method are set on the trial bench first, so the output you compare is the output you get. If your grade is not in the tables, send it — the closest configuration is usually a change of screw set, not a different machine.