PPA-CF and PPS-CF?

MrSteve

Hey all, I’m currently in the process of making my own orca out of PET-CF and PLA Pro, and was just browsing some of the other filaments Bambu labs offers. I came across these 2 filaments in the title that are only distributed through authorized sellers in select locations. The impact and strength of these parts seems a bit lower, but they seem to have a Much higher thermal resistance than the Pet CF and nylons.
Personally i would love to try out these filaments but my printer can’t reach the necessary temperatures to even melt this stuff to print it.
Would these filaments be an even better long term replacement to pet cf and nylons due to their greater thermal resistance? If not, would they still have merit in places like silencer internals or maybe even as a risky sort of barrel?
Link to the Bambu filaments based off of thermal resistance : https://bambulab.com/en-us/filament/collections/heat-resistant

hoffmantactical

I need to look into it more. The PPA-CF Is interesting due to the insane (30 KPSI) tensile strength claimed by Bambu. Now the HDT was not that much better then PET-CF, looking at the glass transition temp I'd say they are pretty similar in that regard. The even lower impact resistance is a concern. Since it's out of stock I've not been able to get a roll to test.

Because layer adhesion becomes the main limiting factor on prints like the Orca, I suspect the PPA-CF will have little advantage if any over the PET-CF.

PistollPeet

I’ve recently picked up Qidi PAHT-cf to try some cf parts on my ender. Looking online at their website it’s also listed as ppa-cf. I haven’t used it yet but the ratings look interesting and it’s in stock 👍

MaliciousFetus

Does Anyone know if PPA-CF has bad creep or if it needs any annealing or anything? I'm interested in making my orca out of it but I can't find if it needs to be annealed. I've seen on various websites that it has better "dimensional stability" than PA6/12/612, would this point to it having low creep? @HT I'd be super interested to see a test comparing this to other types of choice nylons and other filaments.

hoffmantactical

MaliciousFetus I need to get my hands on some. Don't know how it creeps right now.