Hulls made of HDPE

Discussion in 'Materials' started by Baldur, Jun 3, 2005.

  1. jonr
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    jonr Senior Member

  2. jonr
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    jonr Senior Member

    3M's DP-8005 is also reported to work well.
     
  3. yellow cat
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    yellow cat Junior Member

    i was an Okoume/epoxy fan for building my catamaran, i found that the plywood 3 mm was easy to work with. this hdpe product is raising my interest. could i buy sheets of hdpe and laminate them with proper glue ? The finish and antifouling "paint" are also a question mark.
     
  4. rasorinc
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    rasorinc Senior Member

  5. jonr
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    jonr Senior Member

    I would think that where possible, heat fusing would be better than glue.
     
  6. powerabout
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    powerabout Senior Member

    Anyone have any news on Twintex, there are some beach cats built by Twin Cat in France at our club and they are all ( well ones exposed to the sun) looking like unpainted expoxy carbon parts in that the cloth has come to the surface so nice non skid finish now. They were smooth when they first arrived.
    How would you fix this?
    What kind of paint system?
    Could you treat as per a plastic car bumper ( ppg dpx801?)
    I have emailed owenscorning and waiting for a reply...
     
  7. Fanie
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    Fanie Fanie

    I wonder if you have a PE hull that got damaged, if you could put it back in the roto mill and give it a 'new' treatment...
     
  8. powerabout
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    powerabout Senior Member

    the soft heavy roto moulded stuff can be welded successfully.
    I used one as a tender on a dredge I worked on years ago and we crushed it and did all sorts of things to it.
    They are very soft compared to later things like I described above which is close to your typical fibreglass weight but you cannot dent it with a sledge hammer with a full swing!
     
  9. yellowcat
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    yellowcat Junior Member

    for a dingy, i plan to build a hovercraft, quite a program.
    this high density polyet... could be of use. Flamability is a concern but there are treatments and add ons possible. Roxul insulation is one of them.
    This hovercraft could even house my VW cabrio for beaching a car possibility. There are more reasons for that application, one of them is a <save the planet> reason for building less road infrastructures, i am working on a design for a hybrid elect/hydrogen/unleaded gas craft. of course the car engine's contributes to the <mothership catamaran>.
     
  10. grob
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    grob www.windknife.com

    Don't know the answer to this, I made some hulls from twintex about 5 years ago, we left them with a natural finish i.e. no Gelcoat and they have also ended up the same way after 5 years exposure to the elements. I guess the answer is that they should have been gelcoated in the first place.

    At the time my thinking was that a gelcoat on top of twintex would defeat the object of having a boat that was impact resistant.

    Did the Twin Cat boats originally have a gelcoat finish?

    Gareth
     
  11. powerabout
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    powerabout Senior Member

    No, they are actually molded with twintex plastic ( off white colour) with twintex cloth inside so I need to prime the twintex so we can paint one.
    Clearly twintex doesnt really have UV resistance unlike gelcoat
    Do you know what type of plastic twintex is?
    Thanks
     
  12. yellowcat
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    yellowcat Junior Member

    HDPE abrasion qualities/weight

    This may be the product i will be working with, i plan to design an hovercraft dingy capable of carrying a small car.
     

  13. grob
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    grob www.windknife.com

    Its a thermoformed Polypropylene see http://www.twintex.com/

    Cheers
     
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