Is cork a bad sandwich material.

Discussion in 'Fiberglass and Composite Boat Building' started by khaos, Feb 25, 2013.

  1. khaos
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    khaos Infusion Padawan

    I have some cork that was used for flooring so it has a great compression. Its at least equivalent to my 18 pound sign foam with the thumbnail test. Heavier by a little though. But cheaper by a factor or 10. :eek:

    Has anyone tried using this?
     
  2. petereng
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    petereng Senior Member

    cork is used as a core and is available especially for this use through various suppliers. I'd be wary of flooring cork as its intent is for flooring not structural. But if you have a non importnat application then give it a try. Peter S
     
  3. khaos
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    khaos Infusion Padawan

    On further review, this cork is as heavy as soft pine :eek: and not as strong so clearly its not the best choice. I was thinking along the lines of a less expensive alternative to balsa and weight should have been at least a secondary concern. :eek:
     
  4. PAR
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    PAR Yacht Designer/Builder

    Sheathing peel strength would be suspect on cork and the weight issue, makes other materials more attractive.
     
  5. JSL
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    JSL Senior Member

    check out the shear strength as well.
     
  6. khaos
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    khaos Infusion Padawan

    I realized that it was not as good out loud as it was in my head. :eek: Ideas can certainly be like that. :idea:
     
  7. michael pierzga
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    michael pierzga Senior Member

    Cork Sandwich ?

    I tested a Ham and cheese on toasted cork sandwich yesterday. The cork got wedged between my teeth as I compressed and sheared thru it . I Had to pick cork bits out piece by piece with my Swiss army knife.

    Better to go with a Baguette. Baguettes are tasty in both shear and compression .
     
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  8. tunnels

    tunnels Previous Member

    a very good answer !!
    If cork was suitable for a core dont you think some one would have used it by now ?? look at the structure it has no crain !! as a sound proof material we stuck down 9mm of sheet cork in concrete sub floor to deaden sound of wooden floors in aparment buildings . it works well in wine bottles ,works well in womens high heels shoes ,
    But wont work for a core material with glass each side .wake up and smelll the flowers what you been smoking ??:(:eek:
     
  9. petereng
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    petereng Senior Member

  10. tunnels

    tunnels Previous Member

    Its the same company that someone else asked about a couple or more years back and my answer is still the same and will not change !
    Like i said if it was all they say it is there be cork being used every where !!
    I wouldnt even use it with infusion !!
    What about cornies or wheat bix break fast cereals . now fruit loops could add a bit of colour !! :idea:
     
  11. michael pierzga
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    michael pierzga Senior Member

    A good link for builders is Materia. Its a data base of material, use and source.

    Type in cork or foam core marine plywood and presto Bellotti appears....

    http://www.materia.nl/541.0.html
     
  12. PAR
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    PAR Yacht Designer/Builder

    Even the CoreCork, supplier doesn't recommend cork for infusion or other higher load situations. Once you ask for about 12 ft/lb compressive strength, you need to look at other materials.
     
  13. tunnels

    tunnels Previous Member

    Whats next ???

    What about peanut board !!! its won the new material of the year award !! its would make a nice core !! when you sitting on a desert island after being washed ashore you could tear the core out of you boat and light a fire to keep warm :confused::(!
     
  14. PAR
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    PAR Yacht Designer/Builder

    I'll bet it has better physical properties than cork . . .
     

  15. rxcomposite
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    rxcomposite Senior Member

    I forgot to eat my baguette and is now 6 days old. It certainly has improved on its shear. I need a saw to cut it. :p
     
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