Adhesive for Coroplast & matboard

[Natalya Murphy]

What adhesive would you use to adhere matboard to Coroplast? PVA doesn't seem like the right choice for this.

[Dave]

I use either Franks Fabric Adhesive or Lascaux 498 all the time for this purpose with great success.

[preservator]

Hot melt glue can do the job, if over-all adhesion is not required.



Hugh

[PaulSF]

I hear Pres. Bush used Frank's Fabric Adhesive in Iraq, that's why we're stuck there and can't get out.

[Jim Miller]

What's the purpose?

If you're using Coroplast as a reinforcement behind a matboard, where there would be little stress on the adhesive, then I suggest using 3M #889 double-sided tape. It's quick and sticks very well to both surfaces. Burnish by impact (pound it with the heel of your hand).

If the adhesive bond is under any sort of stress, then I would use a Lascaux or other contact-type adhesive, or smear some arcylic gel on it. Do not use ATG under stress.

[Baer Charlton]

Jim, do you think it would be ok to use ATG if it promises to meditate every day and attend Bio-Rythums classes at least once a week? :D

[Rebecca]

I have used a similar 3M tape product for laminating matboard to Coroplast for at least 20 years, some hanging in my home, and have never seen a problem. These are all in frames so there is no particular peel or pull stress.

Rebecca

[jojoframer]

I found this on a coroplast website.
Q: Is it possible to bond or glue two pieces of Coroplast™ together?

A: Polypropylene is great for many uses due to the fact that it is resistant to chemicals; unfortunately the same properties make it difficult to bond using chemical bonding agents. However, several products have been developed recently by companies such as 3M that are designed to bond polypropylene structurally. Coroplast has not yet tested these products fully. 3M's Scotch-Weld™ Structural Plastic Adhesive DP-8005 is available from Grainger and other distributors for industrial use.

Heat welding with proper tools is an excellent method to bond two sheets of Coroplast™.

Jo Ann

[Jim Miller]

When using two layers of Coroplast with flutes crossed, I have occasionally sewn them together with a curved needle. This works well on very large mount/reinforcement boards, when the layers are pieced together.

Joining the sheets mechanically, such as by sewing, also eliminates drying time, which is usually overnight for the non-hygroscopic boards.

[Jim Miller]

Jim, do you think it would be ok to use ATG if it promises to meditate every day and attend Bio-Rythums classes at least once a week? :D

Nope. That wouldn't help the ATG, because failing under stress is what it does, no matter what. However, your suggested therapy might be good for the unfortunate framers who mistakenly depend on ATG under any sort of load, when they have to deal with their disintegrating framing.

Baer, whatever you're smoking these days, I wish you'd bring enough for the rest of us.:party:

[Baer Charlton]

Just good chemo Jim... and a bunch of biorhythm stuff. You can have my share.... I don't really want it.

But back to cross flute backing... If the two pieces are cut to fit the frame fully, where would the stress be? And once they are secured into the frame with points, I can't think of anything that would shear that ATG bond.

But then, I haven't played with this stuff nearly as much as you have, so I'm going to always default to your knowledge. In fact, Coroplast was something that I had esoterically heard about a bit in the special effects industry and never in the framing until I started lurking the G.

Gotta love this place.

[Jim Miller]

... If the two pieces are cut to fit the frame fully, where would the stress be? And once they are secured into the frame with points, I can't think of anything that would shear that ATG bond...

You've just explained the distinction nicely, Baer. ATG is good for applications where its bond is not under stress, or where a temporary bond is adequate.

Two layers of Coroplast might be stiff enough to resist deflection if a Chinese scroll weighing 2 pounds is attached in several places over a 5 foot span. As you said, ATG would be OK if it holds the board layers together until the framing is completed. But if a 20 pound musket is hanging from the top layer, there might be some gravitational stress that could make the board pucker a bit.

In reinforcing a mount board, such as 4-ply matboard with 4 mm Coroplast added after the mounting, the 4-ply board could deflect under the weight of, say, a 2 or 3 pound object mounted to the middle of it. If ATG were used to stick the 4-ply board to the Coroplast reinforcement, the tendency for deflection could be the stress that would pull it loose.