A google for HDPE glue shows several options, at non-crazy prices. A few years
ago I looked for glues for various slick 'poly' plastics and the options were
few, hideously expensive and generally came with a suggestion to not put a lot
of stress on the bond.
From: Bruce Layne <[email protected]>
To: Enhanced Machine Controller (EMC) <[email protected]>
Sent: Saturday, October 22, 2016 4:22 PM
Subject: Re: [Emc-users] glue question?
In general, no matter what your glue question is, my glue answer is epoxy.
HDPE is almost as difficult to glue as UHMW or Teflon. Very low surface
energy. I'd recommend cleaning with isopropyl alcohol to remove every
trace of oil from the surfaces (HPDE and panel), allow it to air dry,
and then use a liberal amount of RTV silicone. You seemed to be heading
in that direction with your Goop musings. Don't be stingy. Slop it up
the sides of the HDPE if possible so it has more surface to grip and
it's protected from shear loads, which are the enemy of adhesives.
I've had good luck mounting stuff like PC power supplies and solid state
hard drives inside a panel with 3M VHB double sided tape. VHB = Very
High Bond. It's the stuff the auto industry uses to attach automotive
trim strips to prevent automated car washes from yanking them off. Even
then, I try to mount these components on the base of the cabinet so
gravity is helping the adhesive bond rather than trying to peel the
device off the vertical side of the panel. I use powder coated steel
cabinets, and that's a slick surface that doesn't bond well. Even
worse, it's a crinkle finish so there's about half the surface area or
less for the adhesive bond to grab.
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