datasheet recycled PET - SML

ecycled PET
inline sheet production from recycled PET bottle flakes
Two competent partners: EREMA Engineering
Recycling Maschinen und Anlagen
GmbH, Ansfelden/Linz, and SML
Maschinengesellschaft mbH combine
their know-how to form a new, highly
innovative system: from PET wastes
directly to PET sheet. Features are:
- cleanliness of sheet US-FDA/EU-ILSI
approved
- no external predrying necessary
- minimized IV-loss
- high-quality roll stock,
- sheet is ready for thermoforming
Due to the low viscosity loss during
processing, combined with the appropriate
downstream equipment, it is
possible to produce direct-food-contact-approved,
high-quality PET thermoforming
sheet, made of 100 % post
consumer-washed PET bottle flake.
Upstream process as provided by
EREMA: The PET-bottle flake is fed
into the plant automatically from a silo
via hopper loaders. The flake passes
a vacuum slide into the vacuum dryer.
In the vacuum dryer, the material is
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Bundesstrasse 1a
A-4860 Lenzing
Austria - Europe
mixed, heated, dried and crystallized,
all in one working step. Due to the
dwell time of approx. 1 hour at high
vacuum and high temperature, residual
moisture is efficiently removed. This
is essential for minimizing IV loss. In
particular, no external predrying is
necessary. In addition to this, the rotating
tools inside the vacuum hopper
provide the force for efficient and continuous
filling of the tangentially placed
and directly connected single screw
extruder. The extruder screw takes the
material, plastifies, homogenizes and
degasses it, and then directs the melt
to the large-area fine-mesh filter system
with its integrated fully automatic
self-cleaning system.
The downstream process by company
SML: Once the melt is free of impurities,
it is passed through the melt
pump, static mixer, and manual die.
The melt curtain is polished on the
SML horizontal 3-roll-stack allowing a
thickness range from as low as
150 µm and up to 1 mm. With this wellproven
roller arrangement it is possible
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to achieve a highly polished film surface
even with low-viscosity materials
such as PET. The integrated gauging
system allows easy control and adjustment
of the film thickness to achieve
the required tolerances. Waterbased
antiblock is applied to the film surface
to ensure good denesting properties of
thermoformed articles. A film
accumulator and take-off unit is installed
in front of the winder to make
roll changes easy and safe. Final sheet
width is obtained by an edge trimming
station between accumulator and
winder. The trim is directly guided to an
edge trim granulator, and fed back to
the extruder for reprocessing. A turret
winder produces full width rolls with
outside diameters of up to one meter.
Like all SML extrusion systems, these
machines too are tested under production
conditions prior to delivery.
Therefore, our installation and commissioning
phase at the customer site
is unrivalled in predictability and timing.

ecycled PET
inline sheet production from recycled PET bottle flakes
1 material conveying 6 backflash filter 11 antiblock application & drying
2 vacuum sluice 7 melt pump & static mixer 12 film accumulator
3 vacuum reactor / pre-dryer 8 flat die 13 edge trimming
4 single screw extruder 9 horizontal 3-roll-stack 14 turret winder
5 double venting 10 thickness gauging system
type extruder extruder output roller width max. sheet width thickness range
I ø 80 mm (1108 TE-VSV) 250 - 300 kg/h 750 mm 500 – 600 mm 150 – 1000 µm
II a ø 90 mm (1109 TE-VSV) 300 – 350 kg/h 750 mm 500 – 600 mm 150 – 1000 µm
II b ø 90 mm (1109 TE-VSV) 300 – 350 kg/h 900 mm 630 – 750 mm 150 – 1000 µm
II c ø 90 mm (1109 TE-VSV) 300 – 350 kg/h 1050 mm 800 – 900 mm 150 – 1000 µm
III a ø 100 mm (1310 TE-VSV) 400 – 450 kg/h 750 mm 500 – 600 mm 150 – 1000 µm
III b ø 100 mm (1310 TE-VSV) 400 – 450 kg/h 900 mm 630 – 750 mm 150 – 1000 µm
III c ø 100 mm (1310 TE-VSV) 400 – 450 kg/h 1050 mm 800 – 900 mm 150 – 1000 µm
IV a ø 120 mm (1512 TE-VSV) 550 – 650 kg/h 900 mm 630 – 750 mm 150 – 1000 µm
IV b ø 120 mm (1512 TE-VSV) 550 – 650 kg/h 1050 mm 800 – 900 mm 150 – 1000 µm
IV c ø 120 mm (1512 TE-VSV) 550 – 650 kg/h 1400 mm 1150 – 1250 mm 150 – 1000 µm
V a ø 140 mm (1514 TE-VSV) 750 – 850 kg/h 1050 mm 800 – 900 mm 150 – 1000 µm
V b ø 140 mm (1514 TE-VSV) 750 – 850 kg/h 1400 mm 1150 – 1250 mm 150 – 1000 µm
V c ø 140 mm (1514 TE-VSV) 750 – 850 kg/h 1650 mm 1400 – 1500 mm 150 – 1000 µm
VI a ø 160 mm (1716 TE-VSV) 1000 – 1100 kg/h 1400 mm 1150 – 1250 mm 150 – 1000 µm
VI b ø 160 mm (1716 TE-VSV) 1000 – 1100 kg/h 1650 mm 1400 – 1500 mm 150 – 1000 µm
VI c ø 160 mm (1716 TE-VSV) 1000 – 1100 kg/h 1800 mm 1550 – 1650 mm 150 – 1000 µm
VII a ø 180 mm (2018 TE-VSV) 1400 – 1600 kg/h 1650 mm 1400 – 1500 mm 150 – 1000 µm
VII b ø 180 mm (2018 TE-VSV) 1400 – 1600 kg/h 1800 mm 1550 – 1650 mm 150 – 1000 µm
VII c ø 180 mm (2018 TE-VSV) 1400 – 1600 kg/h 2000 mm 1750 – 1850 mm 200 – 1000 µm
VIII ø 210 mm (2021 TE-VSV) 1900 – 2100 kg/h 2000 mm 1750 – 1850 mm 200 – 1000 µm
www.sml.at
printed 02/2009
We reserve the right to technical modifications.
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