31/08/2025
We’re Calling It, PLA Has Won (for Now).
After a year of trials, tests, failed prints and wasted spools, we’ve drawn the line: PLA can’t be treated as one stream anymore.
We’ve always separated the obvious stuff like carbon-fibre PLA, glass-fibre PLA, wood-fill, glow-in-the-dark. No surprises there they’ve never mixed cleanly. But the real headache has been the “everyday upgrades” to PLA like Tough, +, Matte, Silk, HT.
On paper they’re all just PLA. In practice? They’re chemically loaded in ways that clash when you try to recycle them together
Matte PLA has chalk/talc fillers to dull shine. Too much mineral = brittle, clogs extruders. Silk PLA has flow modifiers & polyester-like additives for gloss. Mixed with chalk-heavy Matte = micro-fractures and weak bonding. PLA+ / Tough PLA have elastomeric impact modifiers. These fight chalk-filled Matte, giving inconsistent extrusion and layer splits and HT (High-Temp PLA) has crystallisation agents for higher heat resistance. Blended with standard PLA streams means uneven shrinkage, warping, and inconsistent extrusion.
We’ve thrown everything at this
* Shredded waste into 3–6 mm chips.
* Pressed into consistent 3 mm and 5 mm sheets.
* Built water-cooled and air-cooled extruder mods.
* Controlled moisture and extrusion speeds.
None of it cracked the real problem to be honest, the additive conundrum. Every tweak that makes one type of PLA “better” makes it chemically incompatible with the next. Chalk vs flow modifiers, elastomers vs crystallisers, it’s a battlefield...
So here’s the line in the sand, we cannot run a single-stream PLA recycle that covers Tough, +, Matte, Silk, HT, Etc We’ve tested it every way, and the material science says, no!
From here on, we ask you keep separating, Glass, carbon, wood, glow as always and now also the “extras” (Tough, +, Matte, Silk, HT etc). It’s more work, but it’s the only way to make recycled filament that prints well and lasts. Better separation = better recycled filament. That’s the standard we’ll stand behind.