whether it’s a 90-deg. peel pulling straight up or a 180-deg. peel, which is really challenging for a lot of adhesives,”Eichacker explains. This makes PU5 a powerful solution forflexible systems with a lot of movement in the bond arealike belts or rubber stripping, damage to which some MROtechnicians can encounter daily.
Taken together, what we have here is a full range of adhesives
that seem enough to take on most conceivable issues that arise
in the maintenance, repair, and operations environment
across any plant or industry. This was, in fact, a central drive
for the product launch.
“First of all, we had to understand the primary demands
of the MRO market,” Eichacker recalls of the R&D process
behind the GorillaPro line. “Then, how can we boil down
what are thousands of different products available to us into
something we like to call the ‘90% solutions’—three prod-
ucts that are going to solve 90% of the cases?”
After a year’s effort testing, discussing, and remixing
designs, this process resulted in the EP3, EP5, and PU5
However, finding the perfect adhesive mixes for thismarket only resolves half of the original problem.
The next challenge was to provide thesemixes in a form factor and delivery systemthat allows MRO technicians to have readysupplies of them wherever and wheneverthey need them, and in a way that obviatesthe need for cans or pails of two-part adhesives for technicians to make precise measurements on the fly. In other words, H.B.Fuller had to help these harried workersrespond faster with better solutions whilealso helping to prevent incidents likemy axe “fix” from ever occurring.
This solution proved to be far simpler than finding the 90% solution,though equally ingenious as the adhesives themselves.
FINDING THE RIGHT MIX
Rather than employing cans or pails of
two-component adhesives, the entire de-
livery system for the EP3, EP5, and PU5
products is contained in a single, two-
part foil pack containing both the resin
“What we have now is essentially a
3.5-gram kit—about 1.75 grams of A and
1.75 grams of B—in these little packets,”
Eichacker says. “So now you don’t have to
store it in a hazmat locker in the corner
of the factory. You throw these into your
toolkit so if the technicians out there in
the furthest 40 acres of the refinery or in
the back corner of an assembly area need
adhesives quickly, they can have an as-
sortment of these three adhesive packets
right there in the toolbox with them.”
Now it comes down to the field test.
SWINGING FOR THE FENCES
To do this, I went back to my original failure, affixing a very old axe headon a very new axe handle—a job thatrequires strong impact resistance between two parts that refuse to alignuniformly. Seems like a perfect test forthe EP5.
COVER STORY | THE PERFECT MIX: GORILLA GLUE GOES PRO
22 NEWEQUIPMENT.COM I NOVEMBER 2020
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The fast-setting, polyurethane-based PU5 offers a powerful solution for applicationsrequiring movement and flexibility on the bond line, such as belts or rubber stripping. (H.B. Fuller)