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Old March 7th, 2019, 10:21 PM   #41
JimNorth
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NinjaFlex TPU looks interesting. My application uses steam at about 2 bar, maybe 2.5

How do you determine the usable temperature of 70 C that you mention?

It appears that shapeways doesn't print with NinjaFlex TPU. I'm beginning to think doing this requires a great deal of dedication.

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Originally Posted by ToolAA View Post
Jim, like Migraineman noted above the typical bed temp for TPU would be around 60 C. Ive heard that NinjaFlex TPU is pretty soft like Shore 85A. That melts at 220 C but should be usable at temps up to 70 C under low pressure.
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Old March 7th, 2019, 10:41 PM   #42
ToolAA
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Jim my 70 number is an estimate based on two factors. First Ive used TPU to make my own gasket and the bed temperature is usually 65-70C. At that temperature the material is still pretty solid. Also the melt temperature is around 210-220 to I just figured that a maximum operating temperature of about 1/3 of the melt temp seemed reasonable. I dont think the material would melt at 100C.

As for pressure 2-2.5 bar is also not very much, but it may be possible to design a part that could withstand the working conditions you described it may just have to be thicker and more robust.

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Originally Posted by JimNorth View Post
NinjaFlex TPU looks interesting. My application uses steam at about 2 bar, maybe 2.5



How do you determine the usable temperature of 70 C that you mention?



It appears that shapeways doesn't print with NinjaFlex TPU. I'm beginning to think doing this requires a great deal of dedication.


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Old March 7th, 2019, 10:55 PM   #43
JimNorth
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It would be fun to experiment with the design. Do you know of a 3D print shop that would print NinjaFlex TPU?

Quote:
Originally Posted by ToolAA View Post
Jim my 70 number is an estimate based on two factors. First Ive used TPU to make my own gasket and the bed temperature is usually 65-70C. At that temperature the material is still pretty solid. Also the melt temperature is around 210-220 to I just figured that a maximum operating temperature of about 1/3 of the melt temp seemed reasonable. I dont think the material would melt at 100C.

As for pressure 2-2.5 bar is also not very much, but it may be possible to design a part that could withstand the working conditions you described it may just have to be thicker and more robust.
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