KM_AHEAD_1_12_E.pdf - Netstal

26 KraussMaffei Group AHEAD Issue 01.2012
eva Film recycling wiThouT qualiTy ProBlems
EvA fIlms foR solAR moDUlEs
with the new, patented technology of a special flat-film extrusion line, Kraussmaffei Berstorff
offers an exciting solution from an ecological and economical perspective for manufacturing
eva films.
TeXT: Toni niPPe, holger schaarschmidT, ProF. dr. Bernd PolTersdorF
With the new flat-film extrusion system
from KraussMaffei Berstorff, ethylene
vinyl acetate (EVA) films can be produced
at high speeds with a width of up to 3.2 m while featuring optimum
visual property pattern and low shrinkage – even when recycling the
edge trimming.
The fields of application include the rapidly growing photovoltaic industry
where, in 95 percent of applications, EVA films are now used
as standard as encapsulation films for silicon cells in solar modules.
The application in laminated safety glass panes is also interesting
since EVA films are more cost-effective than the polyvinyl butyral
(PVB) that are used today and can be produced more easily.
Tests carried out by the Fraunhofer Center for Silicon Photo voltaics
(CSP) in Halle have proved that EVA films that are manufactured on
the new extrusion system are highly transparent. They feature transmission
in a glass-EVA-glass test sample in the spectral range
PeT acTiviTies
bUnDlED EXPERtIsE In tHE PEt AREA
in 2011 the Kraussmaffei group brought together all of its PeT activities under the umbrella of netstal.
customers benefit from a larger product range.
TeXT: chrisTine groB PhoTo: grouP-inTernal sTocK PhoTo
Both Netstal and KraussMaffei have been working
successfully for years in the global PET market
(PET: polyethylene terephthalate, a plastic for beverage
bottles). We consolidated Sales and Marketing
for the PET-LINE series of the Netstal brand and the PETForm series of
the KraussMaffei brand under one roof. This step was greeted by skepticism
from the industry. “However, our customers quickly realized the
advantages – as shown by the number of orders received,” emphasizes
Thomas Anderegg, Marketing Manager, Sales and Application Technology
at Netstal.
mARkEt lEADERs
in the beverage industry,
approxi mately 80 percent of the
PeT packagings worldwide are
used for carbonated soft drinks
(csd) or non-carbonated water
and juices.
between 420 and 1100 nm of 99 percent. At the same time, the shrinkage
that now occurs has been reduced by up to 45 percent so that it
is now lower than 5 percent. And the highlight of these results is that
they were determined for both a commercial formula for a new product
and for a sample that had been recycled three times.
vERsAtIlE
zeuTX twin-screw
extruder gently prepares
the eva material
Clearly, the larger product portfolio from a single source is convincing.
This way we can configure a system for each customer that is perfectly
tailored to its individual needs. PET-LINE from Netstal is a state-ofthe-art
production system on a platform basis for PET preforms. A wide
variety of mold and cavity sizes can be combined on the basis of three
clamping force sizes: 2000 kN, 4000 kN, and 6000 kN. The advantage is
minimum production costs at maximum output.
The PETForm series of the KraussMaffei brand is also an efficient module
platform for manufacturing PET bottle preforms. With their vertical
clamping unit design and an electric plasticizing unit, the machines
distinguish themselves above all by their high efficiency and excellent
uptime. The low production costs and long mold service life make PET-
Form systems a reliable solution for the beverage industry.