I do resin infusion regularly for my RC Boat Hulls. I find that a 16 minute Degass at 100% Vac is optimal, helping to get a clean bubble free finish. Of course you need absolute vacuum on the project(no leaks) and an experienced touch on resin flow speeds during the process. I use MCI Hose with the Vacuum. The results are usually perfect now. I plan to try out the new MB80 Vac Hose alternative and evaluate the results vs cost.
Hi, I understand it's been quite a while since this video was done but here is my 2c. Could it be those small bubbles you see still coming out are from Nitrogen dissolved in the epoxy chemicals? After all, the resin and hardener were produced at atmospheric pressure. Much like our blood has Nitrogen dissolved in and it will bubble out when, for example and astronaut is caught out in the "open" without a suite or a scuba diver, not doing the proper decompression, will have to deal with the decompression sickness called The Bends, due to evaporation of the additional Nitrogen dissolved in his blood due to the high pressure of his dive. It's one thing the big bubbles we add in due to missing but the Nitrogen dissolved in due to atmospheric pressure will be more homogeneously dissolved in and probably will take longer to get rid of. Just a thought By the way, I'm loving your videos
Sure. It could be just about any dissolved gas from the air, including water vapor. I've discovered over time that I may be pulling just a little too much vacuum. By reducing the vacuum by just 1 psi, I can get the outgassing to quit.
Some of the bubbles might be from atmospheric air that's in solution, much like a SCUBA diver has nitrogen in the bloodstream. When pressure is reduced nitrogen comes out of solution.
Hi, I degassed resin today and it seemed good at the beginning but the resin liquid seemed to "boil" after a while (bubbles arise and increase in size as they rise up). I was guessing perhaps the resin did boil since the pressure is really low but i couldn't find a boiling point v. pressure chart online. Do you have any idea how this happened? Thanks!
That is to be expected when the pressure gets really low. I've done some tests where I just let it keep boiling. It just keeps boiling and boiling. Since some of the content that is out gassing is needed for the epoxy, I only let it boil for about 30 to 60 seconds. That should be enough to get all the air bubbles and some of the moisture out of the epoxy.
@@Designer103 the resin wil "collaps" when the majority is out. The bubbles go down rapidly and at this point the air is basicly out. When it keeps boiling how you call it. Its breaking up moisture in the epoxy.
I do resin infusion regularly for my RC Boat Hulls. I find that a 16 minute Degass at 100% Vac is optimal, helping to get a clean bubble free finish. Of course you need absolute vacuum on the project(no leaks) and an experienced touch on resin flow speeds during the process. I use MCI Hose with the Vacuum. The results are usually perfect now. I plan to try out the new MB80 Vac Hose alternative and evaluate the results vs cost.
I have trouble doing resin infusion. I get bubbles and air voids in the corners
very helpful video. thanks
Where the bubbles might be coming from is there might be some water in the resin as at these vacuum pressures water will start to boil.
That Is the highest likelihood.
Hi, I understand it's been quite a while since this video was done but here is my 2c.
Could it be those small bubbles you see still coming out are from Nitrogen dissolved in the epoxy chemicals? After all, the resin and hardener were produced at atmospheric pressure.
Much like our blood has Nitrogen dissolved in and it will bubble out when, for example and astronaut is caught out in the "open" without a suite or a scuba diver, not doing the proper decompression, will have to deal with the decompression sickness called The Bends, due to evaporation of the additional Nitrogen dissolved in his blood due to the high pressure of his dive.
It's one thing the big bubbles we add in due to missing but the Nitrogen dissolved in due to atmospheric pressure will be more homogeneously dissolved in and probably will take longer to get rid of.
Just a thought
By the way, I'm loving your videos
Sure. It could be just about any dissolved gas from the air, including water vapor. I've discovered over time that I may be pulling just a little too much vacuum. By reducing the vacuum by just 1 psi, I can get the outgassing to quit.
Some of the bubbles might be from atmospheric air that's in solution, much like a SCUBA diver has nitrogen in the bloodstream. When pressure is reduced nitrogen comes out of solution.
Hi, I degassed resin today and it seemed good at the beginning but the resin liquid seemed to "boil" after a while (bubbles arise and increase in size as they rise up). I was guessing perhaps the resin did boil since the pressure is really low but i couldn't find a boiling point v. pressure chart online. Do you have any idea how this happened? Thanks!
That is to be expected when the pressure gets really low. I've done some tests where I just let it keep boiling. It just keeps boiling and boiling. Since some of the content that is out gassing is needed for the epoxy, I only let it boil for about 30 to 60 seconds. That should be enough to get all the air bubbles and some of the moisture out of the epoxy.
@@Designer103 this makes sense! Thank you so much!
@@Designer103 the resin wil "collaps" when the majority is out. The bubbles go down rapidly and at this point the air is basicly out.
When it keeps boiling how you call it. Its breaking up moisture in the epoxy.