How about the PETG-HF?

[huminlian]

Bambulab PETG-HF is specifically designed for high-speed 3D printing, similar to the high-speed PETG offered by other brands. But what sets PETG-HF apart from standard PETG filament? Let’s explore the key differences.

[Olias]

@huminlian

Let’s explore the key differences.

How do you propose we do this?

Aside from price, I don’t see much of a difference between that and Elegoo’s Rapid PETG. My tests did not show a material difference other than a lighter wallet.

[MalcTheOracle]

It is simply designed to melt at a rate more conducive to pushing it through the hot end at speed.

While the Bambu Lab variant is called HF for High Flow, others brand them HS for High Speed and yet more abbreviations, the fact is, they are all exactly the same, they are all PETG with a mix designed to print faster.

TPU has a known shore scale on which the firmness is an important differentiation. PETG is PETG.

[AeonJoey]

Demonstrable differences I’ve noticed:

• BBL PETG-HF has more matte of a finish
• BBL PETG-HF doesn’t ooze and cause my bed leveling to fail half the time because of poops being pulled onto the bed and getting stuck in the center back Z-screw
• BBL PETG-HF bonds better to my garolite (lightyear G10) plates
• BBL PETG-HF when printing on garolite has smoother bottoms with less underextrusion gaps, and less noticeable elephant foot

I can post pics, but I’m using almost entirely grey and white ELEGOO Rapid PETG and BBL PETG-HF, I’ve switched completely to HF for these reasons.

[Rossero]

@huminlian

PETG-HF apart from standard PETG filament

Make sure to check out this topic as well:

Bamboozled by PETG-HF

Wow, just figured out the hard way that PETG-HF is apparently not everything I thought it was. I’ve ordered several rolls of it and was generally happier with it than regular PETG. It prints easier and it looks better. I didn’t consider the fact that the trade off for it printing fast means it has to melt easier. I knew it, I just didn’t consider all the implications of it. I have a lot of re-usable spools for PLA that I’ve made myself - out of PLA. Obviously I knew those wouldn’t work for…

Especially this one:

@TetrisPetris

Former injection molding engineer here - this is a dirty secret in the molding industry too: high flow variants of polymers is just marketing speak for shorter molecular chains. This enables them to melt at a lower temp to enable lower viscosity at a given process temp. Unfortunately, nearly every desirable performance attribute of thermoplastics is a function of hydrocarbon chain length, so this will reduce strength and toughness along with temperature resistance

I’m not sure if this applies to the filaments in the same way as it did for this user in the industry, but there is something going on. I use PetG for better heat resistance and slightly different mechanical properties compared to PLA. If PetG HF removes those improvements, I’ll just stick to PetG. I have never had any issues with it and I’m rarely impatiently printing big objects anyway. (I never printed PetG on a bambu printer though, but I can’t see how that might be a different experience).