thermally conductive filament, mk4s - General discussion, announcements and releases

RE: thermally conductive filament, mk4s

_KaszpiR_ — Fri, 16 Jan 2026 06:40:21 +0000

Print 3d model and use it to create a cast for molding?

Diem — Fri, 16 Jan 2026 00:16:17 +0000

You can try copper filled filament - it definitely has a greater heat capacity but it doesn't conduct heat as well as straight metal.

Cheerio,

RE: thermally conductive filament, mk4s

Jim — Thu, 15 Jan 2026 22:23:27 +0000

No question metal is better, but I'm making a contorted shape that is hard to mill.

RE: thermally conductive filament, mk4s

jan.d.slay — Thu, 15 Jan 2026 07:43:00 +0000

Posted by: @hyiger
The only one I'm aware of is this: https://tcpoly.com/purchase-ice9-materials/
Is there a reason you need to print a heat sink as opposed to milling it from aluminum?

Depending on how much heat the heat sink has to dissipate, I would prefer to use metal.

RE:

Jürgen — Thu, 15 Jan 2026 07:28:01 +0000

That thermally conducting TPU @hyiger found is interesting. But at best, you could use it to print thermal pads -- thin flexible layers to establish thermal contact between an object and a proper metal heatsink. It's thermal conductivity is only 6 W/(m*K), whereas aluminum has > 200 W/(m*K).

I'm afraid wanting to 3D print a heatsink using FDM is a fool's errand. You could probably produce something useful via SLS (laser sintering) with metal powder -- if the geometry demands 3D printed parts; otherwise classical milling should be cheaper.

RE: thermally conductive filament, mk4s

hyiger — Thu, 15 Jan 2026 02:01:55 +0000

The only one I'm aware of is this: https://tcpoly.com/purchase-ice9-materials/

Is there a reason you need to print a heat sink as opposed to milling it from aluminum?

thermally conductive filament, mk4s

Jim — Tue, 13 Jan 2026 15:18:08 +0000

I'm trying to print heat sinks. Are there recommendations for thermally conductive filaments? I'm using a mk4s.