A little Vapor treatment Experiment on PLA - tell me your thoughts
翻譯年糕
Charlie Ting
2017-02-10 00:38:39
how about the temperature ?
Dan Salvador
2017-02-10 00:42:16
Dan Salvador
2017-02-10 00:42:27
the liquid on the plate is water
Dan Salvador
2017-02-10 00:42:39
aceton only on the paper tissue
Charlie Ting
2017-02-10 00:47:05
COOL!! take any photo for the before and after?
Dan Salvador
2017-02-10 01:06:24
this is before
Charlie Ting
2017-02-10 01:16:25
Dan Salvador
2017-02-10 01:18:36
Dan Salvador
2017-02-10 01:19:57
Dan Salvador
2017-02-10 01:20:02
Charlie Ting
2017-02-10 01:36:46
Dan Salvador
2017-02-10 01:56:06
Birk Binnard
2017-02-10 02:10:41
That's interesting - and confusing. Water boils at 100C which is well below the melting temperature for PLA. Even with a slight pressure buildup inside the glass the temperature of the steam couldn't have been more than 105 - 110C. So it's not clear t
o me how this could have much effect.
Maybe the heatgun made the glass work like an oven and the temperature inside the glass was much hotter. If that's what was happening I don't see what the water was for. But you picked the glass up with bare hands, so how hot could it have been?
I've thought about vapor smoothing with THF (tetrahydrofuran), which is far better than acetone for dissolving PLA, but this stuff is so volatile I'm wary of causing an explosion.
Dan Salvador
2017-02-10 03:06:48
The water on the bottom act as a seal , the glass handle was cold and the heating took about 15 minutes on the side only , yes it acts as a pressure oven
Birk Binnard
2017-02-10 03:09:39
So the key piece of missing data is - what was the temperature inside the glass? If I knew that I could try putting a part inside my kitchen oven set to that temperature. That would be a really easy and safe way to do surface smoothing.
Perhaps the ef
ficacy of acetone is increased at higher temperatures. This would not be surprising.I did not find it particularly effective at normal room temperature, which is why I've tried THF.
