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Parts sticking to the smooth steel sheet when using TPU  

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Thomas Lynch
(@thomas-lynch)
Eminent Member
Parts sticking to the smooth steel sheet when using TPU

Just made some parts from TPU and one of the parts was so stuck to the sheet that I had to destroy the surface in order to get it off. Two other parts are also stuck but I managed to get them off with great force. What can I do to the sheet to avoid this? It was Overture TPU with a recommended Print temperature of 210-230 (I used 220) and a Bed Temperature of 25-60 (I used 50). This was on my MINI+.

Posted : 07/05/2022 8:41 pm
gkas
 gkas
(@gkas)
Estimable Member
RE: Parts sticking to the smooth steel sheet when using TPU

I use Overture TPU on my MK3S. I use 220/0, on my smooth steel sheet. No bed heat. I do raize the Z a tiny bit from my general PLA settings. I also use a coating of glue stick as a release agent. I'm still very careful in removing the parts. 

I recently purchased the 'Printed Solid Brand Prusa i3 MK3/S Mk2.5 Double-Sided Pei Textured Powder-Coated flex sheet' from Printed Solid. It works quite well with TPU. It doesn't stick as much with TPU. I'm not sure about the Prusa version, because they were sold out at the time.

Posted : 08/05/2022 6:21 am
Robin
(@robin)
Reputable Member
RE: Parts sticking to the smooth steel sheet when using TPU

I'd recommend to check this: https://help.prusa3d.com/materials before printing new material...

If at first you don't succeed, skydiving is not for you.

Posted : 08/05/2022 9:05 am
hawai
(@hawai)
Estimable Member
RE: Parts sticking to the smooth steel sheet when using TPU

Been there, seen it, almost lost a smooth sheet...

 

Changed to the textured sheet and no problems since. Flexible filament is finicky to say the least.

Posted : 08/05/2022 12:22 pm
Thomas Lynch
(@thomas-lynch)
Eminent Member
Topic starter answered:
RE: Parts sticking to the smooth steel sheet when using TPU

Wow! Great to see that I am not the only guy on the block with this problem.

Thanks for all the suggestions. I have noted them all.

Thanks again.

Posted : 08/05/2022 3:29 pm
fuchsr
(@fuchsr)
Noble Member
RE: Parts sticking to the smooth steel sheet when using TPU

Killed a satin sheet they way. You need glue stick as a separating agent. Or something like Layerneer. 

Posted : 08/05/2022 4:59 pm
ManelTo
(@manelto)
Estimable Member
RE: Parts sticking to the smooth steel sheet when using TPU

my best solution is talcum powder

Sorry for my poor English. I try to do my best.

Posted : 08/05/2022 5:01 pm
mpothmann
(@mpothmann)
Eminent Member
RE:

Hairspray (extra strong / super strong) works best for me. It contains the same PVA stuff (polyvinyl alcohol) as glue sticks or Magigoo sticks but gives a nicer bottom surface.

This post was modified 1 month ago by mpothmann
Posted : 19/05/2022 8:24 am
Diem
 Diem
(@diem)
Famed Member

PVA is the stuff to use; I've tried several sources, they all work OK and if it still doesn't want to shift just dunk it in water and peel it off as the PVA softens.

PVA sources:  Glue stick diluted and spread evenly with water, PVA liquid glue diluted, dissolved waste PVA (soluble filament) support ....

Cheerio,

 

Posted : 19/05/2022 12:15 pm
mpothmann
(@mpothmann)
Eminent Member
RE: Parts sticking to the smooth steel sheet when using TPU

I quit messing with diluting glue in water and just use hairspray.

Same PVA stuff, but already diluted. A can is like 1 €/USD and lasts for several kg of filament.

Posted : 19/05/2022 12:44 pm
mpothmann
(@mpothmann)
Eminent Member
RE: Parts sticking to the smooth steel sheet when using TPU

PS: Don't spray the print sheet while it is on the printer.

Take off the print sheet and spray it in the bathtub or somewhere else.

Apply a thin film of PVA hairspray, let it dry for a few minutes and you are ready to go.

Works great with TPU or Nylon filaments.

Posted : 19/05/2022 12:55 pm
Diem
 Diem
(@diem)
Famed Member

Hairspray is OK as long as there are no additives.

Gluestick is one wipe then spread it with a wet paper towel.

Cheerio,

Posted : 19/05/2022 2:20 pm
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