Best Filament for 3d Printed Devices

Audrey_CD

Audrey_CD

Long term member
Aug 16, 2018
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Gloucestershire in the UK
I'm currently using PETG filament as it seems to give the best results when sanded.

However... it retains moisture and after a couple of urinations it stinks in a way that can't be cleaned off.

What are your preferred filaments for home printing or do you use a post printing process to seal the plastic?
 
That's a rather different experience from what I've had. PETG is what I've been using for years and I've never had this sort of experience. Perhaps it could be you're printing at too low of a temperature and/or too fast and are having a higher porosity than necessary.

One of the papers I'd read backs this up :
https://www.mdpi.com/2073-4360/13/11/1758/pdf

"As the printing temperature increases, the viscosity of the PLA and PETG melts decreases, which results in increased fusion between the polymer fuse and the layers, and the porosity decreases."

and

"The tensile properties of PETG increase when the printing speed decreases, and because its heat dissipation is slow, it has low porosity."

I print my PETG at 240-250° C, 4 perimeters and top and bottom layers. Speeds of small perimeters at 15mm/s, and perimeters at 40mm/s - I'm generally in no rush ;)
 
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Great advice, thank you!

Also, don't forget that the thermocouple calibration of most hobby printers can be a little off, and it can change over time. Occasional test prints at varying temps can keep your setup dialed in for each filament.
 
Just wondering what printer are you using? I am using a Prusa i3 MK3S+. PTEG prints well and looking to print in ASA soon to test against some of the PTEG prints.
 
This is a timely question for me. I'm building my Fusion 360 skills to design my own tube, and was wondering what filaments people were using. I was wondering if I'd have to go up to ABS or Nylon to make it more bio-friendly. If i could work in PetG that would be awesome.
 
I use PTEG and seems to work well. I am interested in the ASA just so I can print other things that can handle heat inside of a car in the summer. I have attached a Chart that got me thinking of ASA.
 

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I have printed in ASA, nice quality prints but bed adhesion needed 105degC and likes to lift, so I print with a 15mm brim and set up some sheets of MDF around the printer to stop the cooler air chilling it off.
 
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