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Nylon Material all over, no more part density  

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Daniel
(@daniel-2)
Active Member
Nylon Material all over, no more part density

When first starting to print with Nylon (Fiberthree F3 PA-CF Pro) it was all fine (see right part in the screenshot below). After a while it became very ugly. We did change nothing. We just changed the nozzle thinking it maybe has worn out but still no improvement. We haven't changed any properties in Prusa Slicer either. 

The part doesn't really fill. All the material you see all over the place, it is supposed to be inside the part filling it (left part in the screenshot). I don't think this is called stringing, it is much more severe than that.

Does anyone have an idea?

Thanks!

 

 

Posted : 06/07/2021 3:18 pm
bobstro
(@bobstro)
Illustrious Member
RE: Nylon Material all over, no more part density

Nylon is extremely hygroscopic, meaning it will absorb moisture from the air. Read the section on "nylon filament must be dried before printing" in this MatterHackers article. If everything printed fine before, you most likely need to thoroughly dry your nylon out again.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 06/07/2021 3:38 pm
Swiss_Cheese
(@swiss_cheese)
Noble Member
RE: Nylon Material all over, no more part density

My experience is, Nylon should be dried before and during the print, and if it's a short print with no drying during the print, it should be dried after printing and before its stored.

 

Good Luck

 

Swiss_Cheese

The Filament Whisperer...
Posted : 06/07/2021 8:20 pm
Daniel
(@daniel-2)
Active Member
Topic starter answered:
RE: Nylon Material all over, no more part density

Thanks @bobstro and Greyerzer Migros Reibkäse (@swiss_cheese). I will get a filament dryer and see if the problem is solved. I found some cool dryers which can be used also as filament holder, this way I don't need to use the oven (but you probably know already much more about this device). https://www.bastelgarage.ch/ebox-filament-trocknung-dry-box

 

Posted : 07/07/2021 7:43 am
Brad
 Brad
(@brad-2)
Trusted Member
RE: Nylon Material all over, no more part density

@daniel-2

The device that you have linked to would help to keep the filament dry whilst you are printing but I don't think that it would be hot enough to actually dry the filament. I don't print with Nylon but I believe that it needs 70 degrees to dry. I would suggest that you look for a drier that lists max temperatures of about 75 degrees. I have one of these: https://www.amazon.co.uk/gp/product/B075361FVF/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1  and it is brilliant. I have seen the same device for less than £60UKP on Amazon recently!

Posted : 07/07/2021 3:01 pm
Daniel
(@daniel-2)
Active Member
Topic starter answered:
RE: Nylon Material all over, no more part density

@brad-3

Thanks for your advice. I the meantime I was asking opinions of a friend and he strongly adviced me to get the following model:

https://www.3dware.ch/PrintDry-Filamenttrockner-Pro-De.htm

It can dry up to 75° Celsius and also dry while printing since the filament spool can turn. I ordered it today and should receive it tomorrow.

Let's see how it performs.

Best regards

 

Posted : 07/07/2021 3:18 pm
Brad
 Brad
(@brad-2)
Trusted Member
RE: Nylon Material all over, no more part density

@daniel-2

Yes I've heard that that model is very good.

I have found that it is better not to print with very hot filament straight from a heated dry box. Once the filament has been properly dried, I tend to print with my drybox set at 35 (or possibly up to 50 degrees) depending on what filament is loaded.

Posted : 07/07/2021 3:28 pm
bobstro
(@bobstro)
Illustrious Member
RE: Nylon Material all over, no more part density
Posted by: @daniel-2

Thanks for your advice. I the meantime I was asking opinions of a friend and he strongly adviced me to get the following model:

https://www.3dware.ch/PrintDry-Filamenttrockner-Pro-De.htm

It can dry up to 75° Celsius and also dry while printing since the filament spool can turn. I ordered it today and should receive it tomorrow.

I have the older version of the PrintDry filament dryer. It works well, but I do wish it had an automatic shutoff timer. I don't think the new one has that feature either.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 07/07/2021 5:31 pm
Swiss_Cheese
(@swiss_cheese)
Noble Member
RE: Nylon Material all over, no more part density

 

@daniel-2

 

If you can afford it I'm going to recommend you get a more robust and active drying system. you may find the type you posted to be very in-adequate, especially for drying Nylon.

 

 

@bobstro

The new print dry is great and does what it advertises, it does have a timed shutoff and it cycles the heat as it reached temperature. I now own 3 of them and have no complaints, one older one and two new ones.

 

Regards

 

Swiss_Cheese

The Filament Whisperer...
Posted : 07/07/2021 7:49 pm
bobstro liked
Daniel
(@daniel-2)
Active Member
Topic starter answered:
RE: Nylon Material all over, no more part density

Finally, I bought this machine:

https://www.3dware.ch/PrintDry-Filamenttrockner-Pro-De.htm

I let the filament (Nylon / Fiberthree F3 PA-CF Pro)  dry over night at 75°. This morning I printed some parts and the quality is good again as in the beginning. I am now also drying at 35° while printing.

Thanks to everyone who contributed!

Posted : 09/07/2021 11:17 am
cwbullet
(@cwbullet)
Illustrious Member
RE: Nylon Material all over, no more part density

@bobstro

I use one of these: An electric shutdown timer,  I set it for 1 hour after the print ends.  I store the stuff in a camera storage box between prints.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 09/07/2021 12:31 pm
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