Laminating Polystyrene to Ply

Discussion in 'Materials' started by tmark, Feb 5, 2016.

  1. tmark
    Joined: Sep 2006
    Posts: 86
    Likes: 5, Points: 8, Legacy Rep: 60
    Location: Stratford

    tmark Junior Member

    Okay folks ... let's just say I wanted to bond polystyrene (those pink of blue insulation sheets sold in big-box stores) to a sheet of BS 1088 ply ... what should I use?
     
  2. Ebeneezer
    Joined: Jan 2016
    Posts: 14
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Nanaimo bc

    Ebeneezer Junior Member

    I have made several interior panels like this using epoxy. Sand the surface of the foam with a 80 grit belt and walk on with a pair of golf cleats to create hundreds of good bonding holes. I then vacuum the sheets of ply on both sides at once.
     
  3. tmark
    Joined: Sep 2006
    Posts: 86
    Likes: 5, Points: 8, Legacy Rep: 60
    Location: Stratford

    tmark Junior Member

    Gotcha ... thank you.
     
  4. upchurchmr
    Joined: Feb 2011
    Posts: 2,884
    Likes: 91, Points: 48, Legacy Rep: 579
    Location: Ft. Worth, Tx, USA

    upchurchmr Senior Member

    Epoxy works.

    So does Titebond 2.

    Helped my wife make a table out of 4" foam and ply to stiffen the legs.
    Takes a while longer than normal to "set".
     
  5. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 473, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    You don't need the holes, if using epoxy on these types of low density foam. It just increases epoxy requirements.

    TiteBond II is only water resistant, so consider TiteBond III instead if it'll be in a very humid or an occasionally wet/immersed environment.
     
  6. Tungsten
    Joined: Nov 2011
    Posts: 468
    Likes: 10, Points: 18, Legacy Rep: 75
    Location: Canada

    Tungsten Senior Member

    PL 300 is for foam.
     
  7. tmark
    Joined: Sep 2006
    Posts: 86
    Likes: 5, Points: 8, Legacy Rep: 60
    Location: Stratford

    tmark Junior Member

    Thx Tungsten, are you also able to say how long it takes to to cure?
     
  8. Tungsten
    Joined: Nov 2011
    Posts: 468
    Likes: 10, Points: 18, Legacy Rep: 75
    Location: Canada

    Tungsten Senior Member

    No idea, but it sticks and stays in place while you glue up more.
     
  9. upchurchmr
    Joined: Feb 2011
    Posts: 2,884
    Likes: 91, Points: 48, Legacy Rep: 579
    Location: Ft. Worth, Tx, USA

    upchurchmr Senior Member

    tmark,

    What are you going to do with this lamination?
    Just interested.:D
     
  10. philSweet
    Joined: May 2008
    Posts: 2,252
    Likes: 148, Points: 63, Legacy Rep: 1082
    Location: Beaufort, SC and H'ville, NC

    philSweet Senior Member

    Odd pair of materials to be bonding together. I've done that once when I replaced the foam floor in my dinghy. I glued eps foam boards to the 6mm bottom on my dinghy for flotation and protection from dropping stuff through the bottom, like 60# anchors. I used gorilla glue to stick the replacement foam to the previously epoxied hull. Two layers of foam and a top layer of 2.5mm ply. Then I glassed the edges and draped 9oz cloth. Not a lot of hours on it yet, so I don't know how it will do.
     

    Attached Files:

  11. tmark
    Joined: Sep 2006
    Posts: 86
    Likes: 5, Points: 8, Legacy Rep: 60
    Location: Stratford

    tmark Junior Member

    Why, just experimenting my dear Mr Church. :)
     
  12. upchurchmr
    Joined: Feb 2011
    Posts: 2,884
    Likes: 91, Points: 48, Legacy Rep: 579
    Location: Ft. Worth, Tx, USA

    upchurchmr Senior Member

    I don't usually allow Mr.

    But my name is Marc Richard Upchurch, so as an enlisted instructor in the navy I signed MR Upchurch making the Ensigns upset. If they persisted I put the periods in there.

    The Lt. Commander who was an student of mine just laughed at me, which was what was appropriate :D
     
  13. Steve W
    Joined: Jul 2004
    Posts: 1,809
    Likes: 57, Points: 48, Legacy Rep: 608
    Location: Duluth, Minnesota

    Steve W Senior Member

    I have built a few panels, hard dodger top and cockpit sole, using resorcinol many years ago but I included a cedar perimeter and stringers for reliable bonding. I think today I would use the PL300
     

  14. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 473, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    PL300 isn't very good on dynamic loads, but is suitable for static. It's also not waterproof, just water resistant and it's "creepy" under load.
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.