In reply to RX-78:
> The quad lock comes with 3M VHB adhesive tape. I made a metal plate the same size as the fitting so I can attach the fitting to the metal plate using the supplied adhesive and now need to fix the metal plate to the bag. The bag is by over-board, it does not say what it is made of. I think either polypropylene or polyurethane.
Metal to polypropylene fabric then..probably
If it is polyprop then that polymer is difficult to bond. In the past I tried bonding fabric to metal with unreliable results. In the end I resorted to rivets.
The toughened cyanoacrylate mentioned above might work if the plastic isn't polyprop but if the epoxy didn't stick then in my experience the superglue won't either. I assume the fabric separated from the glue as opposed to the glue from the metal?
The answer from the second bloke on this thread is worth reading as he explains the chemistry behind the problem but the solution is not one that will be available to you.
https://www.researchgate.net/post/A_glue_for_attaching_polypropylene_compou...