100% , eXt rusionCAST FILM LINES PP / PE / PET BARRIER FILM

CAST FILM LINES CAST FILM LINES LINES FOR CPP / CPE / CAST-PET BARRIER AND MONO ORIENTED FILM INTRODUCTION Cast film products are mainly used in the packaging industry, but technical, medical and stationery films are also important sectors. Indeed, the worldwide market for flexible plastic packaging is predicted to grow steadily within the next years. Owing to their good optical and mechanical properties, cast films play a significant role in the flexible packaging market. In most cases printing, metallizing or laminating with other materials represent the subsequent processes in the value chain....

CAST FILM LINES CAST FILM LINES LINES FOR CPP / CPE / CAST-PET BARRIER AND MONO ORIENTED FILM CONTENTS Line Description Extrusion Unit Downstream Equipment Winding Systems

CAST FILM LINES CAST FILM LINES CORONA TREATER TRIM HANDLING SYSTEM WINDING SYSTEM SMILE CONTROL SYSTEM RAW MATERIAL HANDLING AND DOSING EXTRUDER MELT FILTRATION FEEDBLOCK AND FLAT DIE CASTING STATION AIR KNIFE / SOFTBOX

CAST FILM LINES CAST FILM LINES multilayer extrusion unit RAW MATERIAL FEEDING AND DOSING EXTRUDER In view of the fact that raw material account for the major portion of the cost for the production of cast films, it is essential to ensure their efficient use in every film layer. A wide range of gravimetric batch blenders and continuous gravimetric feeders, if needed also suitable for high-temperature polymer processing and with up to six components per extruder, enable recipes to be run with great accuracy and repeatability. Moreover, the complete dosing system, as well as all the material supply...

CAST FILM LINES CAST FILM LINES extrusion tool unit The result is a very low melt temperature, extremely stable output and high pressure generation. HO-LT EXTRUDER This patented extruder is especially designed for the processing of temperature-sensitive polymers such as EVOH or adhesives. It is also used for the thin functional layers in coextruded structures. Effective melt filtration for the removal of impurities, unmelted or cross-linked particles is most important. Usually SML installs manual or hydraulic single filters in its cast film lines. Disk filters or candle filters are used for applications...

CAST FILM LINES CAST FILM LINES FEEDBLOCK AND FLAT DIE EDGE ENCAPSULATION SYSTEM FOR BARRIER FILM As a leading supplier of cast film lines, SML relies exclusively on respected partners for its feedblocks and flat dies. Sophisticated MicroLayer or NanoLayer™ feedblocks are integrated on demand. Multilayer structures require great flexibility with regard to feedblock adjustability. Therefore, SML generally utilizes variable geometry feedblocks and inserts that can be profiled to optimize the thickness variations of the single layers. 3-layer, multi manifold die (Cloeren Inc.) A 3-layer feedblock...

CAST FILM LINES CAST FILM LINES edge pinning system chill roll unit CASTING STATION EDGE PINNING A combined electrostatic and pneumatic pinning system fixes the film to the chill roll surface and reduces the neck-in. Adjustable static power and air pressure, as well as easy positioning allow precise pinning and therefore solid contact between the film edges and the chill roll. low air pressure between the extruded film and the chill roll and prevents air entrapment. In addition, the length of the melt curtain can be adjusted before it touches the chill roll. Both chambers are equipped with separate,...

CAST FILM LINES CAST FILM LINES For the production of thicker film, it is necessary to fix the film additionally onto the chill roll using either an air knife or a softbox. This also enhances film cooling, which results in better haze and transparency values. The SML air knife has a specially designed, internal air distribution system, which guarantees a constant airflow over the whole width of the air knife, and an adjustable lip gap. The air for the air knife is filtered to ensure that no particles are blown onto the film and the blower of the air knife is speedcontrolled. corona treatment...

CAST FILM LINES CAST FILM LINES bleed trim cutting TRIM HANDLING SYSTEM The edges of the film need to be trimmed in front of the corona treater, in order to prevent backside treatment. A final trim is cut directly at the winder and depending upon the winding system, bleed trims are also removed. The trims are sucked through the grinder of the fluff re-feeding system and then transported to a vertical scraptruder. This feeds the fluff together with virgin material directly to the extruder for the core layer. Fluff re-feeding is a very energy-efficient and material-compatible method, as no additional...

CAST FILM LINES CAST FILM LINES WINDER W1050 The winder W1050 is the basic turret winder for the production of thin cast film mother rolls on 6-inch shafts with a maximum winding diameter of 1,000mm. An ultra lightweight dancer roll controls film tension, while the shaft is center-driven and the film is wound onto the roll in either a gap or contact mode. Film cross-cutting is performed by a twisting knife and in standard configuration, the new winding core is prepared with doublesided adhesive tape. As an option, the film can be fixed onto the new winding core by means of electrostatic charging,...

CAST FILM LINES CAST FILM LINES WINDER W1200 The winder W1200 is the thin film turret winder for large widths of up to 5.2m and maximum roll diameters of 1,200mm. An ultra lightweight dancer roll controls film tension, while the shaft is center-driven and the film is wound onto the roll in either a gap or contact mode. Film cross-cutting is performed by a twisting knife and as the film is fixed onto the new winding core by means of electrostatic charging, no core preparation is necessary. During indexing, the incoming film is attached to the surface of the finishing roll by an auxiliary contact...

CAST FILM LINES WINDER W5000 The winder W5000 is a linear turret winder (LTW), which combines the advantages of a horizontal sliding winder and a turret winder and sets new winding standards for cast film. It is a turret winder, which prior to cross-cutting reduces the free length of the web to a minimum by means of individually moveable winding stations, which guarantees perfect winding quality up to the last layer on the roll. CAST FILM LINES again moved horizontally from the central to the outer removal position and is then pulled from the shaft by a lifting trolley. The winding shaft constantly...