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Germany-based Paccor International, which is now a member of the Coveris group, has expanded its production capacity for PET sheet with the purchase of a complete 3-layer coextrusion line, including an in-line lamination station, for its Polish factory in Skierniewice.
The line, which comes from, battenfeld-cincinnati has an output of 1.1 tonnes per hour with thicknesses ranging from 200m to 1.2mm. Due to the inclusion of an in-line lamination station, multi-layer sheet can be produced as easily as barrier sheet, says battenfeld-cincinnati.
Since the end of August 2013 the 3-layer co-extrusion line has been operating at the Polish Coveris plant in Skierniewice. “We have once again chosen a line from our long-standing machine supplier in Bad Oeynhausen, as we are absolutely satisfied with the energy-efficient operation and the options of manufacturing a variety of different sheet products with one extrusion line only. Another decisive argument in favour of the purchase was the high output of 1.1 tonnes per hour with a net sheet width of 900mm, which enables us to optimally cater to the growth market of food packaging”, said Marcin Antos, Managing Director of Coveris, Skierniewice.
The complete line includes components ranging from material dosing through to the sheet winder and lamination unit. The co-extrusion line is capable of producing 3-layer PET sheet in thicknesses ranging from 200m to 1.2mm. With an optional rotating infrared tube (or heater) for pre-crystallisation of the material, regrind can also be used for the middle layer.
Also included is the lamination unit, which means that barrier layer can be incorporated to extend shelf life of the packaging, or with a PE sealing layer for subsequent peelability and/or weldability.
The extruder used for the system is a BC 1-120-40 D WT 170, equipped with a processing unit in which a single screw is combined with a planetary roller extruder section. The machine’s design is similar to that of a standard single screw extruder, but equipped with a planetary roller zone in the degassing area. The operating principle in this area causes the melt to be spread out in very thin layers. In this way, an extremely large surface is generated, which produces excellent degassing results, says battenfeld-cincinnati. This can allow for the use of undried regrind material and also offers a boost to efficiency.