The Effects of Process and Cooling on Film Properties
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1 The Effects of Process and Cooling on Film Properties A Comparison of Blown, Cast, and Water Quench Extrusion Technology WPA Conference Newport Beach, CA June 21-23, 2016 Nick Nigro Sales Product Manager Extrusion - North America group.com
2 Agenda Introduction to W&H Extrusion Technology Basics Cast Blown Water Quench Comparison of Film Properties In-House Experiment Customer Case Study Summary
3 W&H Product Offering Is Unique In Its Scope & Diversity extrusion printing converting
4 W&H Extrusion Equipment Cast Film Blown Film Water Quench VAREX II OPTIMEX FILMEX MDO & Annealing Winding Technology FILMATIC series
5 Co-extrusion Portfolio for Barrier Film Cast Film Blown Film Water Quench VAREX II FILMEX
6 FILMEX Cast Film Line for Barrier Film net width: 160 gravimetric dosing refeeding extruder feedblock + die output: thickness gauge layers: 11 (17*) 4,400 lbs/h * nanolayer chill roll corona treater winder
7 FILMEX Cast Film for Barrier Film Delevopment of Layers and Working Width number of layers working width 17 maximum standard 160 maximum standard
8 Blown Film Line for Barrier Film reversing haul-off layflat unit width: 142 layers: 11 output: 2,200 lbs/h calibration cage air ring die head winder extruder
9 W&H Blown Film Lines Historical Number of Layers 100% 0% forecast
10 AQUAREX Water Quench Blown Film Line for Barrier Film extruder width: 72 layers: 11 output: 1,800 lbs/h die head water calibrator drying annealing station winder layflat unit reversing haul-off
11 Strengths of Extrusion Processes for Barrier Films Cast Blown Water Quench strengths high volume orders optical properties and thermoformability fast format changes zero edge-trim mechanical properties zero edge-trim optical properties and thermoformability typical output typical film thickness > 1,800 lbs/h < 1,800 lbs/h < 1,800 lbs/h > 100 µm < 140 µm µm
12 EXTRUSION PRINTING CONVERTING Flexibility in Film Width Cast Blown to Water Quench
13 Different Processes Different Film Properties Differential Scanning Calorimeter temperature [ C ] melt frost line Blown ambient AQUAREX Cast Time
14 Comparison (W&H In House Experiment) AQUAREX vs. Cast Film vs. Blown Film Production of identical barrier films on all three extrusion technologies 7-layer-film Asymmetric structure PA6 and CoPA 100 µm µm
15 Asymmetric Barrier Film for Lid and Tray PA Tie PE Tie PA Tie Seal 100 µm lid film Seal Tie PA Tie PE Tie PA 230 µm tray film
16 Various Converting Machines used with Barrier Films Thermoforming machine Vertical flat bag machine Horizontal tubular bag machine Vertical tubular bag machine Horizontal flat bag machine source: Wipak
17 Why Asymmetric Barrier Films? Temperature resistant outer layer (e.g. PA, PET, PP) increased sealing temperature reduced cycle time increased life-time of teflon tapes Solutions: lamination with OPA or PET asymmetric co-ex film (e.g. PA/tie/PE) sealing bar heat resistant layer sealing layers Asymmetric film structures can be produced on AQUAREX versus conventional blown with significantly less curling!
18 In-House Comparison AQUAREX vs. Cast Film vs. Blown Film
19 In-House Comparison AQUAREX vs. Cast Film vs. Blown Film
20 In-House Comparison AQUAREX vs. Cast Film vs. Blown Film
21 Comparison of Film Properties tray film, 230 µm optical properties mechanical properties haze stiffness stiff soft soft MD TD blown cast water quenching blown cast water quenching
22 Comparison of Thermoformability tray film, 230 µm thermoforming machine testing of thermoformability [Multivac] cast blown water quenching
23 Product Development for Oil-pouches; A Customer Case Study Typical packaging for edible oil in India Today s Status: PE-Film without barrier Leakage Diffusion of oil through the film Limitations during the filling process Adhesion to the sealing bars Reduction of cycle times Machine stop due to maintenance Using laminates BOPA back-printed Thermal stability for sealing PE-film for mechanical properties Coextrusion of asymmetric film
24 Formation of Curling during Conventional Blown Film Extrusion of Asymmetric Structures PE PA PE frost line: F PE solidifies + shrinks PA solid PE PA PA frost line: F PA solidifies + shrinks PE in a molten phase + elastic PE PA at the outlet of the die >430 F complete structure in a molten phase
25 AQUAREX: No Curling due to Cooling Efficiency PE PA at the outlet of the die >430 F complete structure in a molten phase PE PA water quenching: PA + PE solidify + shrink
26 Product Qualification Made in India! Recipe development cooperation film producer / oil-producer Production of film Surface printing Filling of the Pouches Increase of cycle time 25 to 40 pouches/min. Prolonging the intervals of maintenance Logistic-test Packed in cardboard boxes 2000 km transportation on Indian roads Result: zero-leakage!
27 Barrier Film Segments lid film water-quenching pouch / bag film agri film thermoforming film [UBE] lamination film blown cast [UBE]
28 Summary All technologies have process related advantages. It has to be clarified which technology is best for each application or project. Windmöller & Hölscher has many years of experience in all presented extrusion technologies and can assist with choosing the right technology for the specific application and customer needs.
29 Thank you for your kind attention! Nick Nigro W& H Corporation Sales Product Manager Extrusion - North America Nick_Nigro@wuh-group.com group.com (704)
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