NOT ALL PROFILE
ARE THE SAME
Are you certain that your foiled profile
will not look like this in a few years?
The problem with foiling defects is that
they sometimes only show themselves
years after the installation of the finished
window. The demanding weather
conditions throughout the seasons put
stress on the adhesive until one day it
might give and the result will be the foil
peeling off the window. Despite common
belief, the decorative foil is not waterproof,
so heat and humidity penetrate the
foil and continuously attack the adhesive.
At the same time, additives contained
in the PVC and plasticizers in the decorative
foil migrate to the surface with an
additional weakening effect on the adhesion.
You might hope that this effect will
not appear during the warranty period,
as it would directly lead to a financial
cost, However the damage to the brand’s
reputation of low quality is irreversible.
This is why in Europe there is a strong
trend to guarantee longer lifetimes of
foiled profiles by offering the best possible
quality. The advantage is not only
to achieve a top class reputation but
also to avoid today the claims of tomorrow.
In fact the costs of correcting foiling
defects is far greater than the savings
of buying low cost adhesives, and this is
without taking into account the damage
to the brand’s reputation.
How can you be sure that there will be
no delamination in the future?
There are different test methods of artificial
weathering that have an accelerated
ageing effect on the foiled profile. These
tests demonstrate the resistance of the
compound to the most critical weather
conditions, which are heat and humidity.
The most common test method is the
DOES YOUR CURRENT ADHESIVE
SUPPLIER GUARANTEE THIS?
Taka SRL are the sister company to WPR
Srl the Italian profile lamination machine
For more information on how to increase
the lifetime of your products, contact
Taka on firstname.lastname@example.org
U.K. Agent Mike Dean:
so called “hydrolysis test” applied by the
German quality association GKFP. The
test specimen are stored in an oven for
42 days at 70°C and 98% relative humidity.
After this time the foil is peeled with
a dynamometer. If the strength of adhesion
is still higher than 1.5 N/mm the test
is passed successfully. This ageing test
corresponds to around 10 year’s lifetime
of an installed window in central Europe.
Do your profiles pass this test?
To face the incredibly growing demand
of high performing glues, the Italian
adhesive specialists Taka Srl have developed
what today is the adhesive with
the highest weathering resistance and
subsequently the longest lifetime of all
available Hot Melt Polyurethane Reactive
glues on the market. Numerous test
series by customers and independent
laboratories have shown that while conventional
glues hardly pass the minimum
value of 1.5N/mm after six weeks,
the new generation of adhesives overcomes
this benchmark even after more
than 12 weeks in the oven. Assuming
that the degradation of the adhesion is
linear, this demonstrates a lifetime of at
least 20 years.
WATERPROOF EFFECT DEFECT ON FINISHED WINDOW
TIME OF RESISTANCE TO ARTIFICIAL WEATHERING IN THE OVEN (AT 70°C AND 98% RH)
WEEKS 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15