“Our collaboration with SACMI and Milliken represents a major step forward for sustainable pharmaceutical packaging,” said Todd Zillmer, director, Design, Engineering and Development, jARDEN. “These thinner, lighter bottles offer drug companies a new way to reduce environmental impact while maintaining or improving the necessary barrier performance. jARDEN is developing a wide array of bottles – both standard and customized – using SACMI’s Compression Blow Forming™ machines and Milliken’s barrier enhancement technology. We are fully committed to these innovations, which are changing the game for plastic bottle production.”
jARDEN, Milliken and SACMI are showcasing the new barrier bottle at their respective NPE 2018 exhibits: jARDEN in room #W231A; Milliken in booth #S26023; and SACMI in the Negri Bossi booth, #W363. During the show, a commercially available 90cc bottle will be produced in the SACMI booth with a jARDEN owned 20-station CBF™ machine and tooling. Each Compression Blow Forming™ station moves the process continuously from resin to finished bottles. jARDEN is also manufacturing a cap from clear resin that is brightly colored with Milliken’s ClearTint™ colorants.
CBF™ ensures high part consistency, cost-effective production
Compression Blow Forming™, a sustainable plastic production method developed by SACMI, combines compression molding and blow forming into one process. This novel, patented process offers numerous advantages for pharmaceutical companies. First, CBF™ delivers consistent wall thicknesses, avoiding thinner areas that can allow for faster permeation of water vapor and oxygen. This near-perfect consistency, together with the high-performance properties of Milliken’s barrier technology, permits cost-effective light-weighting without compromising protection.
Further, CBF™ offers reduced cycle time and produces less waste compared to other blow molding technologies currently on the market. Cycle times can be up to 30 percent faster with less than 1 percent scrap.
Finally, the CBF™ process runs at a lower temperature thereby reducing energy use which safeguards the purity of the resin against degradation. In addition to the benefits of lower heat, the compression of the preform reduces shear stress, which is important for initial resin processing and for further use after recycling.
“The value of our unique CBF™ technology, which has already raised the quality bar for pharmaceutical bottles, has been further enhanced by jARDEN’s manufacturing expertise and Milliken’s advanced additive technology,” said Allan Andersen, manager, Technical Sales, Closures, Containers & PET Division, SACMI. “By joining forces, we have developed a state-of-the-art packaging solution that can help the global pharmaceutical industry achieve new levels of sustainability, performance and cost-effectiveness.”
Milliken additive boosts barrier properties
Milliken’s advanced additive technology can be incorporated in HDPE as a masterbatch to create a passive barrier. This technology alters crystal orientation to create a tortuous path that inhibits passage of moisture and oxygen. In effect, a permeant molecule must move through a maze of crystals that are linear and encircle the side walls of the bottle – a process that slows down permeation significantly.
Depending on specific geometry of the bottles and the resin design, the technology can increase the barrier properties of HDPE by 20-60 percent, leading to significant light-weighting opportunities. Without the use of the Milliken barrier additive, HDPE typically forms large, spherulitic crystals that do little to inhibit the passage of oxygen and moisture. Milliken worked with a leading pharmaceutical company to obtain regulatory approval on a material formulation with improved barrier performance.
“NPE is a great opportunity to see Compression Blow Forming™ at work and learn about the benefits it brings to the high-performance plastic packaging our four companies have delivered,” said Deidre Sandrock, Ph.D., global product line manager, Plastics Additives, Milliken Chemical. “The new pharmaceutical bottle we are featuring here demonstrates the importance of bringing together new technologies from different disciplines to benefit customers. This joint project checks a number of key boxes, from environmental protection to quality and efficiency. It offers customers new opportunities to take the initiative on optimizing their drug packaging.”