PU membrane degas material

Discussion in 'Materials' started by ryanonthebeach, Mar 28, 2019.

  1. ryanonthebeach
    Joined: Mar 2007
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    ryanonthebeach Junior Member

    Anyone know where to find / what brand or the general material details for the Polyurethane/PTFE membrain material commonly associated with the VAP process?
    This to help degas laminate throught the part while it's being infused.
    Similar to the MTI hose but in flat sheet/roll
    Would like to create some low void parts
     
  2. ryanonthebeach
    Joined: Mar 2007
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    ryanonthebeach Junior Member

  3. Dejay
    Joined: Mar 2018
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    Dejay Senior Newbie

    I have no clue about this technology but this sound like you can only get it from one place:

    VAP® - Dealing with porosity https://www.vap-info.com/en/dealing.html

    > Trans-Textil GmbH is the exclusive manufacturer of licensed VAP® membrane products as well as the general licensee and technology partner of the patent owner Airbus.

    Also this tranquil nugget of polite legalese: https://www.vap-info.com/en/download/PatentInfringementAIRBUS20170331_ENG.pdf

    So might as well call them. I don't think you'll find a discount supplier before 2021-03-13 when the patent expires.

    Is this removal of volatiles even important for epoxy infusion?
     
  4. ryanonthebeach
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    ryanonthebeach Junior Member

    They have a patent on a process but not the material used in the process.. these membranes are used for many things. I'll have to just buy a few samples and try them
     
  5. Dejay
    Joined: Mar 2018
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    Dejay Senior Newbie

    I've only looked into the patent briefly but my guess is they don't mention what it actually is.

    Now that you mention it, I think I read somewhere about a description of a vacuum film that is "not entirely sealed for deep vacuum". I think it was on the r-g.de shop but I can't find it now. Maybe look for something not entirely diffusion resistant.

    So just to learn, for what use case do you need this?
     
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  6. ryanonthebeach
    Joined: Mar 2007
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    ryanonthebeach Junior Member

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