Degassing

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Degassing

Author	Message
Hanaldo	Hanaldo posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	There's no real point in degassing before wet-laying, it's virtually impossible to not introduce air in this process. The bubbles in the resin are the least of the problem. When we vacuum bag, there is just inevitably air that gets trapped between the layers and in the resin as it is applied. Then when a vacuum is pulled, the air in the resin expands, making the voids bigger. The same thing happens when you degass, the air expands under vacuum and it's larger surface area forces it to evacuate from the resin. Unfortunately when vacuum bagging it gets trapped inside the laminate, as it can't get out through the resin and layers of reinforcement. In the infusion process, the air is completely removed from the entire laminate stack prior to introducing any resin, which is why degassing can be useful because then the whole process is completely free of any air at all. If one doesn't degass, then the only air in the process is what is introduced from the pot. In my opinion it is mostly unnecessary, it just complicates a process that can already have other complications. It certainly isn't necessary at all to degass to get a perfect surface finish on a cosmetic part, though if one were making structural parts for NASA or Boeing then I would see the benefits.
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davro	davro posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 300, Visits: 2.2K	Hi, Degassing just removes the air trapped in the resin mixture as quite a lot of air gets trapped in the mixing process if you're not careful. You could degas the resin before applying it to the fabric, just be careful to avoid introducing air while applying to the fabric. I degass all the time out of habit but I only do resin infusions (if you have one use it) ... I have a small video on my Instafam account showing the degassing in action it's quite surprising the bubbles that come from clear "bubble free looking" resin. https://www.instagram.com/p/BG9yFOJEIyc/ David Stevens YouTube: Comment \| Rate \| Subscribe Instagram Composite Projects Body Package for Dax Rush RC Car Touring Body 1/10 Scale Edited 9 Years Ago by davro
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Umang	Umang posted 9 Years Ago HOT Topic Details
Group: Forum Members Posts: 2, Visits: 7	Why is degassing needed?? Is it needed if we do vacuum bagging with hand layup. What happens when we degas ??
	Reply Like 3