Packaging Resource Center: The Latest in Films and Foils
A clear film laminate is designed to provide visibility of protected contents and a low moisture-vapor transmission rate. The Compos-a-vac 40 (CAV 40) laminate is 3.2 µm thick and features high puncture and tear resistance. The outer layer can be printed with graphics. The inner layer has a sealant to ensure clarity and cleanliness. It also has high slip, and flexibility that makes it adaptable to various packaging machinery. The laminate’s composition is designed to easily conform to vacuum-packaged product contours and edges. The material is available in premade bags or bulk. ITW Richmond Technology, Houston, TX; 713/996-4260; www.richmond-technology.com.
Two lines of high-barrier films are heat sealable and are designed to provide protection from water and oxygen. The Lumirror line of PET films includes printable LumiLid XLS5 lidding film and metallized LumiLid XLM5 lidding film. Both are coextruded and seal to APET, APET-coated board, PP, HDPE, and other container materials. They also feature high receptivity to water-based and solvent inks and adhesives. The Torayfan line of polypropylene films includes Torayfan PC5 and Torayfan PWX5 ultra-high-barrier metallized films featuring oxygen- and moisture-barrier properties. Toray Plastics (America) Inc., North Kingstown, RI; 401/294-4511; www.torayfilms.com.
Foils for Aclar Film
A company offers a line of blister foils that can be sealed to high-barrier Aclar films. The foils are designed to enable pharmaceutical manufacturers to invert the lamination film and thermoform blisters with Aclar-In to improve barrier properties of the package over that of other Aclar structures. The materials can be used for child-resistant foil and unsupported aluminum push-through foil applications. Constantia Hueck Foils, Wall, NJ; 732/974-4100; www.hueckfoils.com.
A variety of stretch films feature higher roll yields than traditional films. Revolution R-122 is a machine film used with high-speed automated wrapping equipment. It is designed to be used at just over half the thickness of traditional films, delivering higher roll yield for fewer roll changes and improved throughput. Revolution R-410 cast film and RHW blown film are stretch films that feature a lighter gauge size than traditional hand-wrap films. They are designed to provide a lower cost per pallet wrapped, high clarity, lower breakage per shift, and high puncture resistance. Pliant Corp., Schaumburg, IL; 847/969-3303; www.pliantcorp.com.
A cyclic olefin copolymer film is designed to protect pharmaceuticals against moisture in blister packaging. Topas is designed to provide long-term moisture protection in all climates and is nearly 10 times less permeable to water vapor than PVC. It is typically used as a core barrier layer in push-through packaging. Film manufacturers can add outer layers of polypropylene, polyethylene, polyvinyl chloride, or PETG to increase the film’s flexibility, protect the barrier polymer, and provide a standard contact layer that can accommodate common sealing systems. It forms at low temperatures, and high-temperature grades are also available. Topas Advanced Polymers Inc., Florence, KY; 859/746-6447; www.topas.com.
A series of push-through and peelable lidding foils for pharmaceutical blisters features a variety of heat-seal lacquers. The Teknilid-series lacquers works with blister webs such as PVC, PVdC, and Aclar. The series also features other lacquers that can be used for webs with peelable or weld-bond properties like polyethylene. The lidding foils can be printed with up to four colors on both sides, including UV inks to provide anticounterfeiting protection. Tekni-Films, a Tekni-Plex company, Somerville, NJ; 908/722-4800; www.tekni-films.com.