Hi, I've been trying to vacuum infuse basalt fibre using the EC infusion kit with an existing vacuum pump. The mould is made from aluminium, and the A side seems to be coming out really well, but the B side (peel ply side) looks to be aerated between the top few layers every time. I recently changed the direction of flow to run along the part rather than across it, which was an improvement but its still not coming out right. I've tried this 4 times now with various directions and layups but I can't seem to get it to work properly.

I wasn't able to order an EC epoxy as I'm in Australia so have used a local resin supplier. The vac pump pulls a strong vacuum, well under the -30inhg gauge minimum. I haven't degassed the resin.
Is there anything specifically that causes this type of failure?







The left one was resin flow across the part from left to right, and the right piece was flow from top to bottom, having to travel over the bends.

Thanks

So the theory is confirmed. The epoxy didn't seem to bond to the basalt fabric well enough and was being ripped off in places by the peel ply.

Made up a CF test piece using the same technique as the basalt before (degassing, resin break, keeping compressor on till gelling), with the same resin, and the results were as they should have been all along. After this I might just use CF and not bother with the basalt until I can find a compatible resin, or a better quality fabric. Thank's everyone for the input and assistance.