GRAPHIC ARTS |PLAKENE ® | TECHNICAL ADVISORY SERVICE
Technical advisory service
One of the most widespread applications of Plakene®
Zafir is box manufacturing. Reactive PUR adhesive
(transparent) is used in this process,
to obtain an optimal appearance.
Packaging with
Plakene® Zafir
Due to its high chemical resistance and non-polar structure,
polypropylene is difficult to coat.
Chloroprene-type adhesives are generally employed,
as well as dual-component and hot-melt acrylics.
Adhesive manufacturers have specific types
for polyolefins (polypropylene and
polyethylene).
Adhesive
coating
Plakene®
Hot air welding and ultrasonic welding can be used to
manipulate Plakene®. High frequency welding is
not possible.
Welding
Plakene®
Ultrasonic
Hot air

Die-cuts: Die-cutting machines similar to those commonly used for cardboard work especially well. For cutting, we recommend what is known as steel slitting, constructed from steel strips from 0.7 to
1.0 mm thick and approximately 22 mm wide, which are set into a
wood plank 15 to 18 mm thick. It is important to point out that the
slitting technique does not cut in a normal manner, but instead both sides are cut at angles.

Creasing: Plakene® is a material with excellent properties of resistance to breaking from the hinge effect. This lets us obtain creases that can be folded over itself time and again without
breaking.
To mark a hinge line on Plakene®, a circular metal
hoop is used. Its height with respect to the cutting
strip depends on the thickness of the sheet
being manipulated.

Extremely clean edges and excellent
creases can be obtained if you work
with a hot die.

Die-cuts
and creasing
Plakene® is submitted to a corona treatment on both sides.
This consists of oxidising the surface of the sheet, which is done via electric discharges to obtain a suitable surface tension for the proper anchoring of the printing inks.
The minimum level of surface tension depends on the
type of printing that will be done later. For example,
39 dyne/cm suffices for conventional screen
printing, 40 dyne/cm for screen printing with
UV inks; and 42 dyne/cm for UV offset
printing.As a general rule, UV offset
printing is guaranteed for 3 months
after the production date, and
screen printing for 6 months.
Necessity of
the corona
treatment
for printing
There are a large number of printing ink manufacturers
on the market, offering specific inks for use
with polypropylene.
Suitable
printing
inks

Plakene® is resistant to oils, weak acid aqueous solutions, bleaches, alcohol and some oils.

Not resistant to strong oxidising agents.It swells when coming into contact with solvents such as gasoline, benzene,
xylene, toluene, and other organic solvents, which
may cause a slight warping.

Resistance
to chemical
products
Polypropylene sheets are not resistant
to the UV radiation in sunlight,
and will become brittle after
a few months of exposure.
On demand, special production
runs can be executed to create
UV resistant products.
Resistance
to sunlight
Plakene® is most tear- and impact-resistant
at room temperature (23º C).
At low temperatures (under 5º C),
it becomes rigid and brittle.
We recommend conditioning
the material adequately
before executing any
works that involve
mechanical force
(folding, creasing,
die cutting, punching,
etc.). Proper conditioning
consists of removing
the straps from pallets,
removing wrappers
and then letting the material
sit at room temperature
for 24 to 48 hours before using it.
Mechanical
resistance of
Plakene®