Three Filaments Your Competitors Aren't Using Yet: PCTG, Foaming TPU, and CF Nylon

Walk through any 3D print marketplace and you're mostly looking at a wall of PLA. Same designs, same material, same feel in the hand. And when everything is made of the same stuff, buyers compare listings on the only thing left, which is price.

I've written before about how that race to the bottom starts. Materials are one of the quieter ways out of it. I don't mean exotic engineering plastics. I mean three filaments you can order today without a special machine, and each one lets you sell something a PLA-only shop can't.

New to Cubee? We're a design library for people who sell their prints, so the design examples below come from our catalog. There's a short note for newcomers, and one for members, at the end.

Photo: vexmatech, Pixabay

Here's the short version. The details, and the catches, come after.

	PCTG	Foaming TPU and Lightweight PLA	CF Nylon
Prints like	PETG, but a bit hotter	TPU or PLA, with temperature tuning	The hard one: dry it, hardened nozzle
What it buys you	Parts that bend instead of shattering	Lighter parts, softer touch on TPU	Stiff, tough functional parts
Who pays for it	Kids' items, anything load-bearing	Cosplay, wearables, anything shipped far	Local businesses that need fixtures
First thing to test	Your best PETG hook or mount	Your heaviest prop or wearable	A jig for a business you already know

PCTG Filament, for the Things That Get Dropped

Think of PCTG as PETG's tougher sibling. The difference shows up when something falls. In impact tests by the My Tech Fun channel (summarised in this write-up), the PETG sample snapped and the PCTG one bent without breaking. Hackaday's comparison lands in the same place: PCTG is highly impact-resistant, PETG isn't.

The catch is small but real. PCTG prints hotter than PETG, closer to ASA settings according to Hackaday, and the same write-up puts the nozzle around 250 to 270°C with the bed at 80 to 90°C. So start from your PETG profile, turn the heat up, and dry the spool first. It also costs a little more than PETG.

In practice that means hooks that don't snap under a loaded backpack, wall mounts that survive being yanked, and kids' stuff that bounces off tile instead of shattering. "This one doesn't break" is a selling point people happily pay extra for. If you already sell functional PETG products, print your bestseller in PCTG, abuse both versions, and if the difference is real, say so in the listing.

An oil funnel printed in PCTG, where heat and oil would test PETG. Photo: dlbuffington, Thingiverse (CC BY-SA 4.0)

A good candidate from the Hive catalog is the Skeleton Bike Rack by Iamprinted. The designer's notes ask for a strong material like PETG at 40% infill and say it holds a bike of around 10 kg. That's exactly where a PCTG test print earns its keep, a bit more margin for the day someone swings a bike into it. The notes also suggest printing the pad in TPU, which comes up again below.

Skeleton Bike Rack by Iamprinted, from the Hive catalog

Kids' furniture is another natural fit. Iamprinted's Cloudy Handle for children's wardrobes already calls for PETG clips. Handles get yanked, hung on and kicked, so a tougher material is an easy story to tell a parent.

Cloudy Handle by Iamprinted, from the Hive catalog

Same logic for anything that carries weight on a wall. Jer{folio}'s Skådis Plant Pot & Ring Mount recommends PETG or matte PLA for UV resistance and durability, so a PCTG version is worth a try for anyone selling into sunny rooms.

Skådis Plant Pot & Ring Mount by Jer{folio}, from the Hive catalog

Foaming Filaments, for Everything You Wear or Carry

Foaming filaments expand as they print. ColorFabb says its varioShore TPU grows to roughly 1.4 to 1.6 times its volume and drops to a density of 0.7 to 0.9 g/cm³. On the rigid side, Bambu says its PLA Aero prints at about half the weight of its regular PLA. Two things happen when a part gets that much lighter.

An RC plane fuselage designed for LW-PLA, on the scale. Photo: Carletto73, Thingiverse (CC BY)

First, it wears better. A prop or costume piece you can carry around a convention for six hours is a different product from one that gives you a neck ache by noon.

Photo: Aaron Douglas, Unsplash

Second, it ships cheaper. Nobody thinks about shipping weight until they start posting parcels across borders, and then it's suddenly the most interesting number in the business.

Photo: nehasharma01, Pixabay

Which one to use depends on the part. Foaming TPU adds a soft, foam-like feel on top of the weight cut, so it suits padding, grips and wearable bits. For rigid pieces like masks and armor, lightweight PLA is the one to try. There are two kinds. Active foaming PLA like PLA Aero expands in the nozzle, and the hotter you print, the more it foams. Polymaker's LW-PLA is pre-foamed, so it behaves more like normal PLA and is easier to dial in.

Prices are the part to watch. Lightweight PLA runs roughly two to three times the price of regular PLA, so it only makes sense on products where the weight actually matters to the buyer.

Deadmoon Designs' Cathedral Knight Full Face Mask is a fun one to test with. The designer recommends PLA or PLA+, so a lightweight PLA print is a fair side-by-side: same mask, less weight on someone's face for a whole convention day. Plan on a couple of calibration prints before the real one, because foaming filaments are touchy about temperature.

Cathedral Knight Full Face Mask by Deadmoon Designs, from the Hive catalog

CF Nylon, for the Quiet B2B Lane

Carbon-fiber nylon used to sound like an industrial-only material. Now Bambu sells PA6-CF as ordinary first-party filament, at around five times the price of basic PLA, pitched for load-bearing structural parts. Polymaker's PA6-CF20 lists an enclosure as recommended, not a heated chamber, so you don't need an industrial machine to try it.

What it unlocks isn't marketplace stuff. It's jigs, fixtures, brackets, tool holders, drone frames, and replacement parts for local businesses. Small B2B work is quieter than Etsy and much less crowded. The machine shop that needs forty custom fixtures doesn't care how pretty your shop page is. They care that the part holds up, arrives Thursday, and comes from someone who answers the phone.

Photo: Zoshua Colah, Unsplash

Now the honest part. This is harder to run than PLA. Bambu's own page says to dry it before use, warns against stainless steel nozzles (you want hardened steel, because carbon fiber chews through brass), and says it won't run through its AMS. Your first spool will humble you.

3D printed drone frames at a U.S. Army print lab. Photo: U.S. Army / Spc. Steven Day, via Wikimedia Commons (public domain)

The upside of all that hassle is that every skill you have to learn before you can sell a product is a skill your competitors also have to learn. Most of them won't bother.

Before You List Anything

Give it one evening of honest testing, with three prints of the product you want to try:

1. Abuse the first one. Drop it, flex it, leave it in a hot car.

2. Photograph the second one properly.

3. Cost the third one for real, failures included. These materials cost two to five times what PLA does, so this step matters.

New materials come with new failure modes, and it's much cheaper to find them yourself than to read about them in a one-star review.

Want Designs You Can Actually Sell in These Materials?

If you're new here: every design in this post comes from the Hive catalog. Cubee plans include a commercial licence, so you can print these in PCTG or lightweight PLA and sell them, no guessing about whether the file allows it. The HiveCommunity plan has over 1,800 designs and adds 40+ new ones every month, and there's a one-time lifetime plan too, for a limited number of seats.

See the plans

If you're already a Hive member: the bike rack, Cloudy Handle, Skådis mount and Cathedral Knight mask are all on the HiveCommunity licence, so they're yours to sell on any plan. Pick one, run the three-print test above, and check Cubee Club for partner deals before you buy test spools. If you try any of these materials, share your results in the members' Discord. I'd really like to see the numbers people are getting.

Not a member and already testing PCTG or foaming filament? Tell me how it's going in the comments.

Happy printing!