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Where possible, permeation rates are reported as their values under stationary conditions, i.e.
when they achieved a constant value over time. In the case of highly permeating films (i.e. sample
A), the onset depletion of the contaminated cardboard already occurred during the measurement
period, resulting in a maximum of the measured rate. In this case, the maximum of the observed
permeation rate is reported. This means that the permeation rate that would be measured under
true stationary conditions might even be higher.
RESULTS OF THE PERMEATION TEST:
All samples were measured in duplicate. For the reasons
explained above, sample A was measured at a lower sensitivity for a period of 19 days. The other
samples (medium and high barrier) were measured at a higher sensitivity for a period of 47 days. The
preceding (p.17) table shows the permeation rates of the tested films at 40°C. The last two lines show
the detection limits (DL) of the measuring unit.
CONCLUSIONS
:
EXTENDO XFWL, NATIVIA™ NTSS and BOPET (reference) show permeation rates
close or even below the detection limit and they can be rated as being equivalent.
Sample A – standard BOPP film – shows very high permeation rates. They reach a maximum alre-
ady within some hours for C12 and naphthalene and then decrease as the concentration of the
substances is the contaminated card board decreases. With regard to sample acrylic/pvdc coa-
ted BOPP film, depending on the permeating substance, the permeation rate is higher by a factor
between 25 and 1000+ vs. the three films above.
Stand A30
Espace Champerret
5th-6th February 2014
www.pcd-congress.com/fr
PCD Congress
(Perfume Cosmetics and Design) - PARIS
AWA IMLCON™
and
IMDCON™
2014
Phoenix, AZ, US
The International In-Mold Labelling
and Decorating Conference & Exhibition
Gold sponsor & Conference speaker:
Duncan Henshall
19th -21st February 2014
www.awa-bv.com/events
Continue...
BOPP
and
BOPLA
films with barrier
against migration of mineral oils