When you order OEM filament, you're buying a manufacturing process, not just plastic. Here's what happens between pellet and pallet — and why each step decides your product's quality.
1. Resin selection & compounding
Everything starts with virgin polymer (PLA, PETG, PA…) plus masterbatches for color and additives. The OEM partner's job: source consistent resin lots and dose masterbatch gravimetrically so every batch matches.
2. Drying before extrusion
Hygroscopic resins must be dried (PA/PC up to 8 h at 80–100 °C) before the extruder. Skipping this creates invisible defects: bubbles and weak layers that surface weeks later.
3. Twin-screw extrusion
The compound is melted, homogenized and forced through a die. Temperature zones, screw speed and line speed are logged continuously — drift in any of them changes the filament's properties.
4. Inline laser gauging
Diameter is measured in real time with laser micrometers. Good OEM lines auto-reject out-of-tolerance filament instantly; that's how ±0.02 mm is actually achieved.
5. Cooling, winding & spooling
Filament is cooled, pulled under tension control, and wound evenly. Poor winding = tangles = customer returns. Then vacuum-sealing with desiccant protects the product in transit.
6. Lab testing & batch traceability
Each lot gets tensile, impact, moisture and color checks; each spool gets a batch code. This is the paperwork your customers never see — until something goes wrong and traceability saves you.
VOXFIL runs all six steps in-house with public QC standards — that's what makes our OEM program turnkey.