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How do we feel about PETG-GF? (forum.guncadindex.com)
submitted 7 months ago by to c/general@forum.guncadindex.com
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Someone recently turned me on to a new weird PETG-GF that is supposed to be very impact resistant and very affordable. I'm always interested in new materials, especially those that are cheap and easy to print in.

I use this "UFA compliant compact striker fired artillery boi" platform for material tests. If it's built well in PLA+, they will take a solid diet of high velocity 22lr with a standard printed breech.

This has been the best one of these I have built so far. I have ran shorts, standard velocity, high velocity, stingers, and interceptors. Extracts flawlessly. No signs of wear at all.

I'll take it out and run the hell out of it within the next couple of weeks.

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[–] [S] 1 point 7 months ago (1 child)

I think hoffman recommended PET-GF, not PETG-GF.

But as far as differences, it prints just like PETG. I did have to run the nozzle at like 260C. It does require drying. It's abrasive, I ate 1mm off the face of a brass nozzle in about 300 grams of material. Steel nozzle has been gone for the remainder of the roll. It needs to be dried, but overnight @ 70C was plenty to get it dry and was good for a couple days afterwards. Nothing like drying nylon.

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  • [–] 1 point 7 months ago

    To be honest I don't recall if it was pet-cf or pet-gf either. But If drying and steel nozzles is the only additional attention that's required to get extra heat resistance with the same or slightly better strength,hardness and rigidity I'll try some!

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