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Triple-Bubble Lines

Macro has designed its triple-bubble lines to produce high performance, barrier shrink films for food packaging in an efficient, versatile and cost effective manner.

Applications

The primary application is the production of tubing for 5, 7, 9 or 11-layer shrink films using PVdC, PA, and EVOH as the key barrier materials.

​Processing versatility is generated through the use of multiple configurations for film orientation and annealing.  This allows for greater control of film shrinkage and physical properties.

The Triple-Bubble Series features:

• Outputs between 25 - 125 kg/hr (55 - 275 lb/hr)
• Tubing width between 200 - 600 mm (8 - 24 in)
• Film gauge between 40 - 80 microns (1.5 - 3.0 mil)

 
Extruders

MacroPlast Extruders are designed to provide superior melt quality and throughput for a wide range of polymers of varying rheology.  They are efficient and reliable, which translates into low operating costs and continuity of operation.

Die

The patented TaperPack™ stackable coextrusion die is the heart of any triple-bubble line, providing the flexibility to produce coextruded structures of exceptional quality with even the most difficult to process polymers.  Each TaperPack™ is computer designed for optimized processability using the rheological data of the polymers to be coextruded.  The die’s performance is enhanced by its reduced wetted surface area, which results in very low residence time and pressure drop.  TaperPack™ dies posses many unique features that set it apart from any comparable die in the market:

• Low wetted surface area
• Low resin residence time
• Reduced pressure drop
• Processing flexibility
• Fast purging
• Compact and lightweight compared to other coextrusion dies
• Reduced number of parts compared to other coextrusion dies
• Fast assembly and disassembly
• Reduced heating and cooling time
• No die block required
• Simplified Internal Bubble Cooling (IBC) design

Downstream

All triple bubble lines come standard with a gauge randomizer to ensure excellent roll quality.  The lines are completed with Macro’s automatic tubing surface winder.

Supervisory Control System

To keep operating costs low, enhance safety and to produce consistently high quality products automation has evolved into a key component of any complete film production line.  Macro offers its SUPERCOM supervisory control package along with a number of optional automation features to satisfy virtually any requirement.

The SUPERCOM supervisory controls system assists the operator during start-up, troubleshooting and normal operation.  The operator’s touch screen provides convenient access to line parameters such as temperatures, speeds and tensions.  The screens also provide varous troubleshooting features to help find the source of a problem should one arise.  Recipe options are also available to facilitate quick start-ups and product changeovers.

Macro's High-Speed Unwind-Rewind Line is the ideal solution for rapid off-line treatment of triple-bubble films at speeds up to 300 m/min (1,000 ft/min).  Click here for more.