Epoxy versus vinyl ester

Discussion in 'Materials' started by Roly, Sep 25, 2010.

  1. rxcomposite
    Joined: Jan 2005
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    Location: Philippines

    rxcomposite Senior Member

    Why do you lose your cool over studies presented by refutable institutions. Why, even personalities were not mentioned. Unless that "****" refers to me and Mike? Then that becomes personal.
     
  2. apex1

    apex1 Guest

    Of course not!
     
  3. rwatson
    Joined: Aug 2007
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    Location: Tasmania,Australia

    rwatson Senior Member

    I dont think Apex was being personal, for what its worth I read it as being "**** - we cant do anything about it"

    This written word can be so easily mis-intepreted though, thats for sure.

    It pays to clarify.
     
  4. War Whoop
    Joined: Jun 2003
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    Location: Sunny Ft Lauderdale Fla

    War Whoop Senior Member

    Depends on the resin there are some with good barcol and @5% elongation which is what one would want for a survivable boat, a example would be the old Dow 470-36 with excellent chemical and physical characteristics which was my base resin system for years.
     
  5. apex1

    apex1 Guest


    5% is a hell of a lot.

    After 1200 tonnes (structural weight) of craft produced (was only 5 boats) we give up on VE processing.
    It was nearly a death trap!

    A proper investment in skilled labour on carbon prepreg, would have saved me money, time, and some disgusting experience, how VE **** deteriorates even while processing it!

    Forget about VE!

    Regards
    Richard

    edit:
    well, should have said:
    we were the "new boys on the block", having processed wood Ep for over 30 years, but "ester" is not what one single worker on my shopfloor wants to handle! So, we go CF for the bigger thingies...
     
  6. War Whoop
    Joined: Jun 2003
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    War Whoop Senior Member

    LOL NO 5% is about perfect Also Here is a 488 KG Hull and deck 11 Meter Offshore boat of mine in done in Dow VE some 20 years ago, I can do better nowadays, BTW you talk to much,it depends on the customer they want to spring for the epoxy then fine but in this economy the VE will win ,I build One off foam core.

    http://www.youtube.com/watch?v=h1csGLgX4tk
     
    1 person likes this.

  7. rxcomposite
    Joined: Jan 2005
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    Location: Philippines

    rxcomposite Senior Member

    Right on the money. When designing for impact strength, VE is better that poly and epoxy

    High density foam core is better than honeycomb or balsa.

    The material property is always chosen by the designer to satisfy the operating condition. Of course, cost is also a factor.
     
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