Tyvek over the vacuum.

Discussion in 'Fiberglass and Composite Boat Building' started by Tungsten, Mar 13, 2014.

  1. Tungsten
    Joined: Nov 2011
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    Tungsten Senior Member

    This subject has been touched on here and there so I thought it would make a good topic.

    I understand wrapping tyvek around the vac lets the air in but not the resin?Dos it work?Do you just wrap a layer around the spiral and fold the ends or plug them maybe?
     
  2. Herman
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    Herman Senior Member

  3. Tungsten
    Joined: Nov 2011
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    Tungsten Senior Member

    Thanks for that,
    I have yet to give it a try,busy making saw dust right now.
     
  4. jorgepease
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    jorgepease Senior Member

    I tried the ready made MTI hose, what I experienced was that as soon as the resin reached and surrounded the hose, it may have still been pulling air but the rest of my resin flow slowed down hugely. So just planning the infusion correctly is the best way. One thing I learned along that line, infusing inward, is you can segment the areas you want to infuse with a central vacuum point, it's pretty easy to control that way and if one area infuses faster than the other, just clamp that centered outlet for that segment. When you are done infusing, re-open all the clamped outlets to pull any excess resin and air out and clamp your inlet. That is my new system )
     
  5. brokensheer
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    brokensheer Senior Member

    so I gather this is covering the suction spiral wrap with tyvec?
     
  6. Tungsten
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    Tungsten Senior Member

    Ah yes,thx Jorge.I have yet to try the perimeter feed with central vac.Sounds like its the way to go.
     

  7. jorgepease
    Joined: Feb 2012
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    jorgepease Senior Member

    Yes, try it! If you have different laminate schedules or asymmetrical geometry that you suspect will infuse at different speeds, breaking it up into segments and infusing inward really makes it easy to control and the setup is easier as well.

    I have yet to try with the cut and perf core though, that will be heaven I believe lol!!
     
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