I've just infused my first test piece, a carbon/foam sandwich using your IN2 Infusion Resin and I am seeing *a lot* of outgassing from the resin under full vacuum. Small bubbles are visable within the within the resin transfer mesh and continue to form/appear as long as there is a hard vacuum. Will this compromise the strength or the cosmetic finish of the finished part? (I haven't de-molded yet.) Is there any way to elimitate outgassing?

Thanks,

Phil.

Hi Philip,

I moved this thread to the Easy Composites Technical Support forum since it's an Easy Composites product you want support on and the Easy Composites support staff (myself and Paul generally) will prioritise support for our own products if you post them in this forum.

Depending on the size and amount of these bubbles, from what you're describing this sounds perfectly normal. You'll always see very small bubbles forming around the mesh and peel-ply at the very front of the resin's progress. A few mm's back from this line the bubbles should fade away. If it is just this then it's simply a function of the resin foaming slightly as it's forced through the laminate and also, to a small extent, degassing slightly (simply from any airation when you mixed it) as the bubbles of air expand under vacuum and make their way out of the resin.

We've tried to get a close up of this on our resin infusion video (take a look at the part where we actually run the infusion). If it looks like this then you're fine. There will be no trace of these bubbles once the infusion is finished.

Best regards, Matt

Matt Statham
Easy Composites / Carbon Mods - Technical Sales

Hi Matt,

I observed the line of bubbles you described along the front of the advancing resin as it infused, but the bubbles I was describing appeared to evolve all over the surface of the part (in the mesh layer) *after* I had clamped off the resin supply (particularly near/around the vacuum connector) - and continued to evolve as long as the vacuum line was un-clamped. There were no leaks in the bag. From what I have read elsewhere, it appears that infusion resins can 'boil' under hard vacuum. I guess the answer is to clamp off both the resin feed and vacuum lines, once the infusion is complete, at the first sign of bubbles forming.

The video demonstration of vacuum infusion suggests clamping off both lines, while the instructions in the EC-TDS-Guide-to-Vacuum-Infusion.pdf document suggest leaving the vacuum line open until the part is cured! I'll clamp off both lines for my next piece.

I have another question, about post curing, but I'll post that under a topic.

Thanks,

Phil.