Bonding HDPE

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RickH

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I need to bond HDPE to Galvanized steel.
It’s a boat trailer so needs to be waterproof .... but this is not load bearing, so no high shear strength required.

The Galv is not fresh, which can be problematic to do anything with.
I am aware that there is a need to apply heat to HDPE prior to any bonding to de-wet the slippery finish.

ideally something like a silicone or rubber ‘flexible’ adhesive would be best.

I have 3M 5200 which bonds most things marine but don’t think it works with MDPE.

Suggestions?
 
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do you mean as a protective sheet coating?

or fastening two dissimilar pipes together?

diagram may help.
 
Would've thought a mechanical fixing ie screw/bolt/rivet would be best.

Don't think I've ever tried it on hdpe, but tigerseal would be worth a shot?
 
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For all intents and purposes you cannot bond or glue HDPE for more than a short period before it debonds. It normally requires a mechanical fastening such as screws used with heavy washers. HDPE is used in sliding applications such as bin wagon compactor bodies, for industrial machine slides, etc - the sort of applications where even sticky stuff will not bond to it
 
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JobAndKnock said:
Forcall intents and purposes you cannot bond or glue HDPE for more than a short period before it debonds. It normally requires a mechanical fastening such as screws used with heavy washers. HDPE is used in sliding applications such as bin wagon compactor bodies, for industrial machine slides, etc - the sort of applications where even sticky stuff will not bond to it
Click to expand...


I found one solution "Mr Sticky's Poly-bonder" you flame treat the HDPE to get rid of the 'wet surface' and it bonds:
Just not easy to locate and expensive for just 1 bond. Hence looking for alternatives.
 
From the web.
“What's the best glue? Plastic cement, cyanoacrylates or epoxies will do the trick, however to ensure you get a strong bond its crucial to ensure you roughen up the surface before application.”
 
At one time I used to CNC machine HDPE components (mainly 1000 grade). I found that thin slide material (I.e 1 to 2mm thick) could be bonded to aluminium with double sided epoxy tape, but that industrial usage would always dislodge it, eventually. I found that thicker components, 20 to 50mm thick, simply wouldn't bond to metals reliably - and in fact both the manufacturers we dealt with (Poly Hi Solidur and Perplas) recommended mechanical fixing and physical restraint (e.g stops) for reliability in thicker components
 
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