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What is the function of barrier film?

  • 1.  What is the function of barrier film?

    Posted 08-27-2018 12:08
    Hello all,

    We need to find a new supplier for barrier film and in the process the question has arisen about what function this bagging layer provides. As you may have guessed all the old-timers have left the company and documentation is incomplete. We use it as a layer between the bleeder and a silicone caul and we assume its only use is to keep resin off of the silicone and off of the vacuum bag itself. Any further ideas?



    LeeAnn Hansen
    Research and Development Technician
    Salt Lake City UT

  • 2.  RE: What is the function of barrier film?

    Posted 08-28-2018 11:50
    Very likely that film is used to keep the resin from going all over the place.  That helps control fiber volume.  Who is your current supplier?  I would call AirTech ( ) and see if they have something similar to what you are using now.  Be sure to describe your desired characteristics as detailed as possible.  They have several materials, so one might be better for you than the others.  Or maybe they can sample you some sheets to try.