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<strong>CPP</strong> <strong>extrusion</strong><br />
base material for metallizing, laminating, and converting<br />
Cast polypropylene films are the base<br />
for a variety of packaging applications.<br />
Produced mostly as three-layer or<br />
five-layer structures, they need to have<br />
excellent transparency for subsequent<br />
printing and laminating as well as low<br />
gauge variation for metallizing. Typical<br />
applications include films for bags<br />
and pouches, wrapping films, textile<br />
bags, candy wrap, antifog and peelable<br />
structures.<br />
Automatic resin supply and gravimetric<br />
dosing systems for up to six<br />
components are placed directly above<br />
the individual extruders. <strong>SML</strong>’s range<br />
of extruder diameters and L/D ratios<br />
match the viscosities to make sure that<br />
the materials processed give consistent<br />
high-quality melt for perfect film<br />
properties.<br />
Feedblock technology and automatic<br />
dies in combination with beta-gauging<br />
sensors are standard features. Web<br />
stability is enhanced by means of the<br />
<strong>SML</strong> vacuumbox, the use of electro-<br />
<strong>SML</strong> Maschinengesellschaft mbH<br />
Bundesstrasse 1a<br />
A-4860 Lenzing<br />
Austria - Europe<br />
static edge pinning, and an airknife or<br />
softbox. The casting section makes<br />
sure that the polypropylene film obtains<br />
all properties such as excellent<br />
clarity and gloss, low haze, wide hot<br />
tack range, low seal initiation temperature<br />
and tolerances and is, finally, easy<br />
to convert.<br />
The casting section is designed to<br />
minimize vibrations and allows for<br />
high production speeds, in the case<br />
of <strong>CPP</strong> rates around 350 m/min, line<br />
speeds being limited by raw material<br />
properties. Edge trimming and inline<br />
recovery assure the best possible use<br />
of the raw material. Corona treatment<br />
is necessary for subsequent converting<br />
steps such as printing, metallizing,<br />
or lamination.<br />
<strong>SML</strong>’s series 2000 winders will, at the<br />
very end of the process, wind small or<br />
large-diameter rolls with the possibility<br />
of part bobbin slitting. Fully automatic<br />
shaft, roll and core handling are additional<br />
features for efficient cast film<br />
Phone: +43 7672 912 0<br />
Fax: +43 7672 912 9<br />
e-mail: sml@sml.at<br />
<strong>extrusion</strong> systems. <strong>SML</strong>’s reliable series<br />
1050/1100 and 1200 turret winders<br />
are used in <strong>CPP</strong> lines as alternative.<br />
<strong>SML</strong> cast film lines are equipped with<br />
the latest servo-drive technology, and,<br />
of course, feature the <strong>SML</strong>’s control<br />
system. As all lines are tested at <strong>SML</strong><br />
prior to delivery, we can ensure fast and<br />
reliable installation and startup at our<br />
customer’s site.
<strong>CPP</strong> <strong>extrusion</strong><br />
base material for metallizing, laminating, and converting<br />
product<br />
polymers<br />
film thickness range<br />
range of final endfilm width<br />
mechanical speed<br />
line configuration raw material handling<br />
feed system<br />
gravimetric dosing<br />
extruder output control<br />
<strong>extrusion</strong><br />
extruder diameters<br />
L/D ratio<br />
melt filtration<br />
melt pumps<br />
co<strong>extrusion</strong> structures<br />
<strong>extrusion</strong> die<br />
casting and downstream equipment<br />
primary chill roll<br />
secondary chill roll<br />
chill roll width<br />
web pinning<br />
gauging system<br />
corona treatment<br />
edge trimming and recovery<br />
trimming station<br />
suction system<br />
scrap reprocessing<br />
winding<br />
basic concept<br />
cross-cutting system<br />
new roll startup<br />
core specification<br />
max. outside roll diameter<br />
full width winding<br />
part bobbins<br />
shaft and roll handling<br />
automation<br />
www.sml.at<br />
printed 02/2009<br />
We reserve the right to technical modifications.<br />
PP-Homo, PP-Copo<br />
18 - 250 µm<br />
up to 4500 mm<br />
up to 350 m/min<br />
individual pneumatic hopper loaders<br />
up to 6 components per extruder<br />
integrated in <strong>SML</strong> control system<br />
30 / 45 / 60 / 75 / 90 / 105 / 120 / 135 / 150 / 180 / 220 mm<br />
28 or 33<br />
hydraulic screen changers<br />
available on request<br />
3 or 5 layers<br />
with automatic cross profile control<br />
ø 800 or 1000 mm, matt chill roll surface<br />
ø 400 mm, chromium-plated surface<br />
2300 / 2500 / 2700 / 2900 / 3200 / 3500 /<br />
3800 / 4100 / 4400 / 4700 / 5000 mm<br />
by combination of vacuum box, softbox or airknife<br />
and electrostatic or pneumatic edge pinning<br />
beta-ray gauging system<br />
one-side, two-side, or alternating-side treatment<br />
inline edge and bleed trimming with blades<br />
edge and bleed trims are sucked off independently<br />
direct refeed by vertical scraptruder or repelletizing on<br />
inline recycling extruder<br />
<strong>SML</strong> series 2000 winders<br />
full width with guillotine<br />
without core preparation<br />
using belt cage<br />
cardboard or plastic core<br />
3” or 6” inner diameter<br />
operating full width<br />
up to 1000 mm<br />
on 6” core possible<br />
inline part bobbin<br />
slitting possible<br />
optionally available<br />
SMILE control system<br />
<strong>SML</strong> series 1100 winders<br />
full width with guillotine<br />
without core preparation<br />
using electrostatic<br />
cardboard or plastic core<br />
3” or 6” inner diameter<br />
operating full width<br />
up to 1000 mm<br />
on 6” core possible<br />
inline part bobbin<br />
slitting possible<br />
optionally available<br />
<strong>SML</strong> series 1200 winders<br />
full width with twisting knife<br />
without core preparation<br />
using electrostatic<br />
shaftless with steel core<br />
6” or 8” inner diameter<br />
operating full width<br />
up to 1300 mm<br />
on 8” core possible<br />
inline part bobbin slitting<br />
as option, on 6” and 8”<br />
cores with shafts possible<br />
with hall crane, supplied by<br />
customer<br />
10
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