Problem: Package and container sealing is
a key component of today’s complex manufacturing processes. Manufacturers require a
system that quickly delivers consistently applied adhesive that can ;t into streamlined
packaging lines. Many companies turn to
hot melt adhesive delivery systems for their
However, traditional hot melt systems
with heated tanks have limitations that
a;ect the e;ciency and cost-e;ectiveness
of packaging lines. These limitations include
excessive adhesive waste through charring
and contamination, nozzle plugging that
can lead to premature failure of ;uid seals
in pumps and guns, and potential danger
or discomfort to operators.
Solution: The elimination of
heated tanks, increased attention to
material consumption statistics,
and a focus on reliability has limited or removed many of the drawbacks of the previous
generation of hot melt adhesive dispensing systems.
The Graco InvisiPac Tank-Free Hot Melt System uses
a vacuum feed to draw adhesive pellets into specially
designed heating chambers. Pellets are melted on demand and are dispensed quickly, without overheating.
The elimination of heated tanks improves hot melt
equipment performance dramatically. By reducing
the amount of adhesive exposed to heat, the Tank-Free process allows for faster heating times. The Graco
InvisiPac Hot Melt System warms adhesive to operating
temperature in less than 10 minutes. Decreased startup
time makes a great di;erence in production uptime
and yield over the course of a hot melt system’s lifetime,
and translates directly into greater pro;tability.
The shortened exposure of the adhesive to heat in the
vacuum-based Tank-Free system also reduces char formation, which signi;cantly reduces material waste and nozzle
plugs. It also leads to less overall system maintenance,
longer ;uid seal life, and less production line downtime.
These bene;ts also lead to improved operator conditions. With a Tank-Free system, an operator no longer
has to hand-;ll hot melt pellets and tank-scraping is
eliminated. Eliminating operator interaction with the
system decreases the chance of burns and other
injury. Reduced odor provides an overall better
In addition, use of a vacuum feed
system keeps the ambient adhesive
contained and closed from the
outside environment, dramatically
reducing material contamination. It also im-
proves the dispensing process and helps to
ensure consistent adhesive
With adhesive costs at
the forefront of manufactur-
ers’ minds, many are looking
for detailed adhesive usage
information to help track
packaging expenses. The
new systems provide moni-
toring solutions to meet this
need. The InvisiPac system
has an intuitive user
interface and USB down-
loadable operating data,
which makes it possible to clearly track material usage
throughout a given time period. This allows packaging
managers to examine the amount of adhesive used over
a single shift, a product run, or other set amount of time.
In addition, operators can now track ;uctuations in
adhesive temperatures, system errors, and key event
history. This information is invaluable for running reports to pinpoint process inconsistencies, optimize the
packaging line, and identify cost-saving opportunities.
Many Tank-Free hot melt systems can use a wide
variety of traditional adhesives, as well as newer grade
adhesives, including metallocene, EVA, and others,
expanding available options.
Customers now have a broad range of adhesive
choices with the industry-leading Tank-Free systems.
Adhesive materials once viewed as incompatible with
traditional heated tank systems due to their brief pot
life stability or tendency to char have now become
viable options for use with emerging Tank-Free systems.
The viability, and often increased a;ordability, of these
materials further expands the number of adhesive
options accessible to the manufacturer.
Tank-free Hot Melt Adhesive Machines Improve Efficiency
For more information, visit www.graco.com.
Tank-free hot melt technology in the InvisiPac System
improves packaging line efficiencies.