Bubbles occur in laminate - while resin was degassed

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#1

Hey guys I need little help on solving one problem…

I made some changes to my infusion system:

  • changed my epoxy into less viscosity ones ( like 230 mpas)
  • improved sealants quality.

Now when everything is laid up , I degass resin as always in the vacuum chamber for like 15 minutes , then infuse the part…

The problem is I see hundreds of bubbles coming from nowhere , most of them on the resin front line, some of them simply stay in place between peel ply and mesh.

I really dont know what is going on here… my vacuum is now better my resin is better so where those bubbles come from :confused:

With old resin and not 100% sealed bag I didnt have such problems…

#2

How does the part look? Better or worse?

#3

Both parts will be released today, Hojo why you asking?

Im just doubtful it will look good because of these bubbles

#4

Its normal to see bubbling at the resin front. It might just be that more air is able to be flushed out during infusion because viscosity is lower. Could be a lot of things. But it doesn’t mean your part has been affected

#5

Yes resin at fron line is common thing , but some of those bubbles just stayed in place