How to remove air bubbles from prepreg panels
How to remove air bubbles from prepreg panels
(OP)
Does anyone have any advice on the best way to remove air bubbles from panels of prepreg? We have been using a vacuum table, but that just pushes the bubbles together and seals them in between plies. (We cut pieces from the panels and use them in a bladder molding process.) We have also tried using a roller that perforates the panels to allow air to escape during vacuum. However, that pushes the backing paper into the perforation holes, which contaminates the material.





RE: How to remove air bubbles from prepreg panels
RE: How to remove air bubbles from prepreg panels
If you are not pre-stacking and I mis-understood your original post, could you describe the type of consumable materials you are using. For your delbulk, consider using a porous material between your laminate and your breather material to aid in air flow during the debulk.
Wes C.
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RE: How to remove air bubbles from prepreg panels
The same goes for elevated temperature cured adhesives, where lap-shear strength losses of 50% and flatwise tension strength losses of 28% have been reported for film adhesive FM300 exposed at 29C (85F) for 1 hour at 80% RH. See 39. Arnott, D.R., Wilson, A.R., Pearce, P.J., Mathys, G., Kindermann, M.R., Camilleri, A., DAVIS, M.J., Swan, G., Void Development in Aerospace Film Adhesives During Vacuum Bag Cure, Int. Aerospace Congress, Sydney, 25-28 Feb. 1997.
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Regards
blakmax