I wonder if the hollow glass sold by r-g.de and others would act in infusion like a flow media? The vacuum would reach everyplace thru the capillaries of the fibers. for example as a bonding layer between several layers and a non perforated foam core to guarantee the the layers bond to the core.
I never knew this existed.
However, for your idea. No. I think the hollow size would be WAY too small for any resin to flow into. 5-6um is small. The point of the fiber is to be light-weight and stay hollow. You would also have to infuse in both directions to get both 0 and 90 deg fiber filled.
My thought was more in line of avoiding dry spots as every moment 100% of the piece is under vacuum whether dry fabric or already infused fabric. I would consider this fabric some sort of MTI Hose but all over the piece. Specially to guarantee wetting out layers that are infused below a foam core and were the fabric sometimes dont completely wet out the adjacent sandwich core.
I imagine that these capillaries arent perfectly leakage free and allow the vacuum to reach every place.
Why should the fabric act as a flow media? The hollow fibres are closed so no air can travel through it or resin can get in it. If resin can get in it you will loose your character of a light hollow fibre.
You have to plan your resin flow like working with any other fibre.
The only advantage is weight saving. For the rest it does nothing to help.
Ok thanks. I assumed some porosity
Does anybody now a provider that sells hollow glass in unidirectional fromat?