PET Film Extrusion without Predrying
24Pages

Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005Dr.-Ing. Frank Pֶhler >

? Overview ? Variations on Extrusion Processesand Line-ConceptsforproducingPET-Films ? Practical Experiences ? Energy Aspects Content > 2 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">

PE PP (incl. fibers) PET PA (incl. fibers) PVC PS >

MachineEquipment Resin conditions and Properties Processing conditions Product > 5 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">

Final product propertiesare the more important features and have to fit the requirements mechanical / physical mechanical/ physical chemical ?pressure resistant?high break resistance?minimized weight ?recycling issue optical Chemical optical ?neutral to taste aspects(Acetaldehyd)?no chemical reaction with food ?gloss and haze > 6 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">

Single Screw with Predrying Twin Screw with Degassing Single Screw with Degassing > 7 Polyester & PET Chain 2005 ֖Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">

am (PET-G)kri (PET-A,C) amamam (PET-G,A)kri (PET-C)kri Vortrocknung Extrusion Tiefziehen Pre-Drying Extrusion Thermoforming Kristallisation Crystallisation Mahlgut > Nicht fr PET-G Not for PET-G Regrind > Morphologie: am = amorph, kri = kristallinam = amorphous, kri = crystalline 8 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-3">

am (PET-G)kri (PET-A) amam (PET-G,A) Extrusion Tiefziehen Extrusion Thermoforming Mahlgut Regrind > Morphologie: am = amorph, kri = kristallinam = amorphous, kri = crystalline 11 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-3">

Reifenhuser Vented-Extruder (80mm) Extruder with the possibility to connect3 vent ports > 13 Polyester & PET Chain 2005 䘖Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">

15 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 > 8. Dezember 2005 size="-1">

PS PP Multilayer PET PVC/EPS > Gesellschaft fɼr Verpackungsmarktforschung 17 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-4">

Extruder Extruder Coextruder Coextruder Glttwerk Polishing stack Dosierung Dosing unit Siebwechsler / Schmelzepumpe / Coextrusionsblock / Dse Screenchanger / Meltpump / Coextrusion feedblock / Die Nachk似hlwalzen Post-cooling polls Abzug Haul-off Wicklermit Speicher und Vorabzug Winderwith accumulatorandhaul-off >

Constant resin propertiesatthe beginningofthe extrusion process humidity bulk density purityofthe regrindmaterial > 21 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">

Purityofthe regrind / recycledmaterial Filtersituationafterstartinga line with PET flakes.Processingtime:30 min > 22 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">

HumidityFlakesOrigin resin variable(constant) Bulk density variableconstant Quality RegrindmaterialResin > 23 Polyester & PET Chain 2005 Amsterdam 12.-15. Dezember 2005 8. Dezember 2005 size="-2">