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Thread: Cutting HDPE panels

  1. #11
    Join Date
    Oct 2005
    Location
    Olympia, Washington
    Posts
    247

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    What glue do you use to glue the Sintra to it self? Do you have problems with the Sintra expanding as it gets warmer or colder?
    Ron Moorehead
    R&S Design
    ShopBot PRS Aphla 48 by 96
    Laserpro Explorer 30 watt
    Universal Laser 50 watt
    3D printer

  2. #12
    Join Date
    Dec 2007
    Posts
    2,260

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    I use the pvc plumbers glue from the borgs

  3. #13
    Join Date
    Jan 2004
    Location
    Marietta GA
    Posts
    408

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    Quote Originally Posted by ron_moorehead View Post
    What glue do you use to glue the Sintra to it self? Do you have problems with the Sintra expanding as it gets warmer or colder?
    Some years ago I worked on a project that required me to “laminate” a sheet of yellow 1/4” pvc between two sheets of white 1/4”. I initially tried pvc glue.
    My first attempts were not successful as when I tried to cut parts from the laminated pvc sheets, a lot of them were delaminating.
    I called the manufacturer of Sinatra and talked to an engineer, he advised me to try straight MEK, it actually melts the pieces together. Pvc glues, he said, contain fillers and additives that can get brittle.

  4. #14
    Join Date
    Dec 2007
    Posts
    2,260

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    The pvc glue that I use seems to melt the sintra togther

  5. #15
    Join Date
    Feb 2008
    Location
    Miller Marine Products, Ridgefield Washington
    Posts
    857

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    I make parts from HDPE all the time and screw them together I use Starboard it is UV stabilized and made to be in the weather. I use at least 1/2" thickness for screwing but it can be glued using 3M 8005 a fast setting 2 part epoxy it is not cheap and requires a special gun with mixing tips. I am not a sign guy so I can't say it is the best material for your application but it does hold screws well and can be glued.
    Mike
    WWW.MillerMarineProducts.com
    Proto Trak DPM CNC Bed Mill
    Brand X Industrial router

  6. #16
    Join Date
    Sep 2006
    Location
    Garland Tx
    Posts
    2,175

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    When I assemble Sintra, straight MEK has worked well with no color staining. So far when using heavy type 1 PVC I’ve mechanically fastened it…

    These 1” thick letters were screwed into the cedar sign from the back

    SG
    Attached Images Attached Images

  7. #17
    Join Date
    Sep 2013
    Location
    Lakin KS
    Posts
    277

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    That's an attractive sign Steve! Very nice.
    Tom Bachman,
    Drafting/Woodworking Instructor RETIRED!
    Lakin, Kansas

    2001 PRT4896
    https://i.imgur.com/xWEFfDk.jpg

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