Talk Composites - The Forum for Advanced Composites

Diolen epoxy lamination is first to fail in peel test

http://www.talkcomposites.com/Topic40122.aspx

By The Mould Destroyer - 5/3/2021 6:29:49 PM

Hi,

I've laminate a sheet of the Diolen 200g black with 72h epoxy (1h work, bought from a local dealer)
the surface was a peel ply surface (the red line one you offer)


I have a specific project with a hard requirement that i need to glue the Diolen to birch baltic plywood.
I've created a test with multiple glues to try and set them up 
But never actually got to test the glues themselves because the surface of the laminated Diolen was the first one to fail, detaching from the wood leaving the peel ply surface on the wood and came out bare bone.

Now one reason can be the epoxy itself, which i think is less likely
The lamination process itself could be the problem? just a fabric on the table with some weight on it (flat object)

Can it be that Diolen does not bond to the epoxy very well?

* I've done a video of the process, posting it is a lot of work for me but if its crucial to figuring it out i will post it per request.

Will appreciate your help, i'm working on it for a long time and its currently a bust, i'm discouraged
By Rosta Spicl - 5/28/2021 2:05:26 PM

 
Hanaldo - 5/27/2021 5:18:59 AM


Yes, exactely...
For very porous material, just like a wood, better don't use cyanoacrylate/acrylic hybrid universal bonder. The cyanoacrylate substrate is suck by a porous surface very quickly...
If the strip is 2x4m be carefull about the curing time, all the mentioned glues are relatively fast curing...3-10min...and all the procedure has to be very very fast...
For example epoxy based Loctite 9466 has a working time cca 60min, Acralock SA 10-05 cca 10min, Loctite HY4070 cca 2-3min...