Loctite HYSOL P/N 98036 - Manual (Page 6)

Page 5
6. Application Hints
As with all adhesives, performance depends on conditions of use. Suggestions or
recommendations contained herein are for guidance only, since actual conditions of
use are outside the supplier’s control.
•
Ensure that the surfaces to be bonded are dry, free from dust, grease, and
loose particles.
•
Apply adhesive to one surface only. Bring the two surfaces together
immediately, quickly making any further adjustments. Hold the joint for 20 –
30 seconds to complete the bond.
•
When gluing dissimilar materials, apply the adhesive to the least heat
conductive of the two.
•
On materials that are cold to the touch, a better bond can be made by pre-
warming them before applying adhesive.
•
Surplus adhesive can be trimmed using a sharp knife once it has cooled.
Should molten adhesive drip onto a smooth or polished surface, allow it to cool
completely before removal.
•
Spots or blobs of adhesive are recommended for work pieces having a large
surface area, or which are particularly long.
•
Applying the adhesive in wavy lines is recommended for gluing textiles or
similar materials.
•
Foam materials, like polystyrene, can be easily bonded to other surfaces.
However the adhesive must be applied to the other surfaces, not to the foam.
•
Use only genuine Loctite
®
Hysol
®
adhesives to ensure reliable performance.
Loctite ® Hysol ® adhesives are non-toxic and non-flammable.
7. Troubleshooting
Before proceeding with any repair or maintenance operation disconnect the tool
from the mains electricity supply.
Glue “Backup” and “Meltdown”
“Backup” occurs when hot molten adhesive in the glue chamber is forced back
between the barrel wall and the outside surface of the adhesive cartridge and piston.
Once this adhesive cools, it may lock the adhesive cartridge in the barrel, preventing,
or at least restricting, normal extrusion. By far the most likely cause of backup is
allowing insufficient warm-up time before operating the tool (the molten glue in the glue
chamber cannot escape forwards because the nozzle is blocked, due to being
insufficiently warm). In the vast majority of cases the backup self-clears once the tool,
having fully reached operating temperature, is operated again.
"Meltdown" occurs when the rear of the adhesive cartridge softens to the extent that it
is not rigid enough to drive the cartridge forward without collapsing. As with backup,
the molten adhesive can solidify, potentially locking the cartridge and / or piston into
the barrel. Meltdown is caused by leaving the tool switched on for extended periods of
time without operating it. It is recommended that, if the tool is to be left standing for
forty minutes or more, it should be switched off and only switched back on when
preparing to use it again.
The Loctite
®
Hysol
®
175-AIR and 175-AIR-HT tools are fitted with specially coated
pistons which have non-stick characteristics far superior to any PTFE coating; this
minimizes the effect of any backup or meltdown, should it occur.