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Pin hole or surface porosity

Pin hole or surface porosity

Pin hole or surface porosity

I am wondering how to create pin holes on surface of composite(in other words surface porosity) under peel ply and to solve this problems
Could you help me?

RE: Pin hole or surface porosity

Expose your pre=preg or film adhesive to high humidity prior to elevated temperature cure.

To control it, see Davis, M.J. , Managing Micro-Voiding of Adhesive Bonds, http://www.adhesionassociates.com/papers/Managing%...



RE: Pin hole or surface porosity

hello blakman !! Thank you very much for your valuable information. i realized there were one TYPO in my original question.
i fixed the TYPO from adhesive film to peel ply

RE: Pin hole or surface porosity

You don't provide very much detail. Are you using prepregs and wet peel-ply? Is the pitting in the fabric weave openings, or are you working with uni-tape. Your problem could be air entrapment, excessive resin bleed, too high a volatile content, excessive resin bleed, and/or wrong cure cycle/bagging procedure.

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