unexpanded kraft paper honeycomb

Discussion in 'Materials' started by Steve W, May 19, 2020 at 10:17 PM.

  1. Steve W
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    Steve W Senior Member

    I'm trying to find a source for the above. This is the honeycomb before it is expanded out to make a sheet.
     
  2. upchurchmr
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    upchurchmr Senior Member

    At one time Gougeon Brothers built multihulls using paper honeycomb.
    Perhaps they would have a source.

    Why?
     
  3. Steve W
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    Steve W Senior Member

    As far as I know they used verticell or tricell like everyone else who uses paper honeycomb does. Typically phenolic resin coated and this is great product and very reasonably priced when compared to any other lightweight core material. Not something you would use for a hull but for furniture bulkheads etc. I have been using pp honeycomb for making up sheetgoods because I can get it easily but it is not particularly light. I would rather use foam but you pay a lot to ship any sheetgoods regardless of weight and the same goes for paper honeycomb so it seems to me that if I could buy it unexpanded it would take up less space and cost less for shipping. I think it would need to be raw. Doing a google search it looks like it can be purchased in block or slice form but I can't find where.
     
  4. upchurchmr
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    upchurchmr Senior Member

    Well don't bother asking them then.
     
  5. Mr Efficiency
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    Mr Efficiency Senior Member

    Door manufacture uses that kind of thing. Not sure where sourced.
     
  6. Steve W
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    Steve W Senior Member

    Thanks for the thought ME,
    Unfortunatly honeycomb as used in composite panels has a much smaller cell structure than the door industry uses, I buy damaged hollow core doors to use as lightweight temporary portable workbenches, nice and stiff, just throw it on a couple of folding sawhorses and cheap. Usually they are punctured on one side so you can see the core and they are a much larger cell than I would want. What I would like to find would be 1/2" cell size or less. Tricell for example have 1/4", 3/8" and 1/2". Obviously the larger cell sizes have less material so are lighter/ft3. Probably 40 years ago multihull designer Malcolm Tennant in NZ told me he was buying it unexpanded. I'm really just interested in experimenting with the idea. We pay a lot of money to ship air when we buy 4x8 sheets of lightweight core material. It weighs nothing but has to come by truck.
     
  7. Steve W
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    Steve W Senior Member

    Sorry, not dismissing the idea, you are right, i will contact them. I know they used Verticel on the deck and presumably furniture of Rogue Wave back in the day. Unfortunatly Meade and Jan are not with us now, I bet they would know.
     
  8. upchurchmr
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    upchurchmr Senior Member

    Have you watched honeycomb being expanded?
    I saw some Ti core being done. Looked like some effort to get it even, they made a pair of special jigs. Looked like a comb set vertically with a tooth or peg for each cell on each end, pulled with a small winch.
     
  9. Mr Efficiency
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    Mr Efficiency Senior Member

    There may be a variety of sizes made by whoever makes it for the door people, but I also wonder about how you would expand it without dramas of having it recoil while you were waiting for the glue to take.
     
  10. upchurchmr
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    upchurchmr Senior Member

    Typically when you expand core, you pull it farther than it takes to get it to the final dimensions, so that when you allow it to relax, it is where it is wanted. If it didn't get to the dimension, you pull again.
     

  11. rxcomposite
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    rxcomposite Senior Member

    Steve- From my book, this is how the honeycomb is made. Even if you are able to obtain the unexpanded variety and manage to make an expansion jig, you will need gallons and gallons of phenolic resin to fully immerse it. Not practical.
     

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