Plastics Technology

AUG 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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tamper-evident seal on the container neck— often a multi-layer foil composite applied by induction heat-sealing— and then replace the hinged flip-top closure. With UfLIPseal, the alternative is to injection mold the hinged closure with a peelable IML film, which can be decoratively printed or not, covering the cap's opening. Both cap and IML film would typically be polypropylene. The low-profile, non-threaded closure has a horizontal flange that allows it to be ultra- sonically welded to a mating flange on the container neck immediately after the container has been filled with product. After retail purchase, the consumer need only peel off the IML film, using a free-standing tab provided for that purpose. No need to take off the whole cap and replace it—in fact, the cap is permanently joined to the container. According to Stephen Robert, UfLIPseal offers several benefits to the producer, as well as the consumer. Eliminating threads in the overcap simplifies injection tooling and saves some cost. More important, it removes weight from both the cap and container neck, saving several grams of plastic—as well as molding cycle time, according to Robert. Another half-gram or so, and attendant costs, are saved by eliminating the neck overwrap and the induction-sealed foil composite. The lower profile of the nonthreaded UfLIPseal container neck and closure also reduce the overall height of the package, as shown in the photos on p. 16. And eliminating threads adds design freedom, A novel concept proposed by two Canadian package designers is intended to save costs and container weight by replacing threaded flip-top closures and induction heat-sealed liners with a peelable in-mold label (IML) that acts as a tamper-evident seal. Stephen Robert and Bill Traynor, partners in KBS Impact Inc., Mississauga, Ont. (, have patented one version of this concept and have a patent pending on another. They call this approach "functional IML" or "FIML." They believe it has wide potential in applications such as non-dairy creamers, nutritional-supplement drinks, ketchup, mustard, salad dressing, vitamins, OTC drugs, drink powders, bath crystals, bath soap, wide-mouth overcaps for yogurt and other spoon- able foods, gable-top containers with threaded closures for liquid foods, and even personal-care products in squeeze tubes. KBS Impact is looking for development partners to help com- mercialize applications or license the technology. SAVING COST AND WEIGHT The patent-pending variant of this technology is dubbed UfLIPseal. To envision how it would work, imagine a squeeze-bottle condiment dispenser or a rigid bottle for vitamin tablets. To utilize either product, the consumer must, in some cases, remove a bottle neck wrap, then unscrew the threaded overcap, puncture or peel off the By Matt Naitove Executive Editor UfLIPseal concept also applies to narrower openings of squeeze bottles. It avoids the need for the consumer to remove the cap, puncture or peel off a tamper-evident seal on the container neck, and replace the cap before first use. Instead, the user only peels off the IML film from the opening in the cap. Eliminate threaded closures and induction- sealed liners with 'functional' IML. Improved consumer experience and lower production costs are offered by 'functional IML.' In Food Packaging, Peelable IML Serves as Tamper-Evident Seal UfLIPseal concept involves molding a peelable IML label onto a hinged lid of a food or pharmaceutical container. The lid has a flange for ultrasonic welding to the body of the container. 14 AUGUST 2018 Plastics Technology PA C K A G I N G Close -Up On Technolog y

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