Join us at PLAST-EX 2007
May 1-3, 2007
International Center
Toronto, Canada
Booth #416
Seal
Cut - High Quality and Versatility
High Quality Side Seals
The new high-speed Seal-Cut sealing
system for plastic film offers an original, innovative solution
for machine direction sealing. The Seal-Cut is capable of
producing high quality, sealed edges in a wide variety of
film applications. The stand-alone design allows it to be
free standing or easily attached to winders, bag-making machines
and rewinders.
Versatility
The Seal-Cut is capable of converting
large jumbo or master rolls into smaller poly bags. This saves
production and equipment costs because you can run several
small size poly bags on one larger line rather than needing
several smaller lines to run the same amount of bags.
Safe
The seal-cut uses a non-sharp
sealing element and has no driven parts. All high temperature
and pinch points are clearly labeled.
Seal
Comparison
Performance
and Benefits
Seal-Cut Seal Profile
Hot Knife Seal Profile
Fastest
Line Speeds in its Class - Up to 820ft/min (250m/min)
Film
Thickness' up to .006 inches (150 microns)
Low or
No Static Build up of the Film
Simple
Design Concept
Consistent
and Reliable
Convert
Master Rolls into Several Smaller Sized Rolls
Reduce
Production & Equipment Costs
Supports
up to 6 seal stations per unit
Background
The Seal-Cut reverses the process
commonly known as slit-seal. Instead of slitting the material
and then sealing it, the material is first preheated, then
sealed and then split. This results in a clean seal, even
on material up to 6.0mil. For most materials, we use a significantly
lower sealing temperature than the hot knife systems. For
instance, a hot knife is usually set between 700 and 900F.
The Seal-Cut is set at about half that temperature. The benefits
of using a lower temperature is the polymer is not crystallized.
The result is a high quality seal that has excellent strength
along the seal edge in both the transverse and machine directions.
Film Path Though
the Unit
The diagram below shows how the
film goes through the unit. The film passes under the sealing
drum which contains the stationary seal element holder. The
seal element itself has three separate zones: preheat, seal
and cut. This three zone approach yields a sealing process
that is more gradual and less of a shock to the film.
How
to See Results with Your Film
If you are
interested in seeing how the process will work for
your material, we have a small lab in which we can
run test runs. Here are the specifications for the
rolls we need: Please send two rolls of each material
you want to trial. Maximum roll width is 19 inches.
Core size is 3 inches. Maximum roll diameter is 12
inches. To setup a trial run, please call the office
number listed on our Contact
Us page.
We generally
use one roll to develop the process conditions and
the second roll to run the samples which we send back
to you. It is important that we also receive the following
for each material: Typical line speed you want to
run the material, and basic makeup of the material
(% Low Density, % Linear Low, % Metallocene, % High
Density).
