Protect Performance with Multilayer Preforms

Leading food and beverage brands understand the importance of protecting their product. Packaging has a major role to play in environmental issues and product safety, with the strict demands of global brands pushing ever-more innovative solutions that protect their product, their consumers and their brand.

Piovan September
The packaging industry-wide trends of light-weighting and sustainability come together most prominently in the beverage sector; bottled water, both still and sparkling, is a particularly hot topic across consumer and professional media, so creating solutions that refl ect these trends is a key driver for food and beverage brands and the packaging manufacturers that serve them. Multilayer technology addresses these trends and delivers performance-lead packaging solutions across the food and beverage markets. With exceptional barrier efficiency, a strong sustainability focus and the capability to utilize up to 100% recycled PET, multilayer technology is lighter, stronger and safer than competing alternatives.  Global packaging solutions company RETAL offers a complete range of PET preforms, closures, containers and films, including an IP-free hotfill preform solution that supports CSR goals by drastically reducing CO2 emissions in transport. RETAL has been active in the increasingly-important multilayer preforms market since 2003, when it introduced the first of six multilayer machines in its RETAL France facility. Today, RETAL offers multilayer solutions across Europe, with market-leading equipment from the most respected suppliers operated by highly skilled experts. Emilie Chassagnard-Perreau, Commercial Manager at RETAL France, says, “As the major supplier of multilayer solutions in France and Europe, we have acquired extensive know-how in multilayer technology. Multilayer is the technology to protect; protect the product and the environment. The objective is to compete with the performance of glass bottles while keeping the advantages of plastic: lighter weight and reduced carbon footprint. Depending on the type of barrier proposed, we can sensibly avoid loss of CO2 for high carbonated water and beverages, the entrance of oxygen for sensitive produce such as juices and protect oxidation and taste deterioration; we can also combine both barrier CO2 + O2 for sensitive products such as beer and propose very long shelf life for products like syrup. RETAL understands the product sensibility and customer requirements and we can adapt the barrier type and formulation proposed.”


Renzo Imperia, RETAL Italia General Manager, continues, “Virgin and standard PET is a material permeable to gases and light. Multilayer preforms can solve almost all these issues. With multilayer, which in this case refers to three layers, we have two exterior PET ‘skins’ sandwiched with an internal layer of barrier. Oxygen is. This barrier can be created for protecting beverage from rays of light, visible and not visible, from oxygen, which is almost always an enemy for protecting against the oxidation caused by oxygen entering from outside to the inside of container and to CO2 loss, conserving the original characteristics of beverages containing gas.” Imperia gives a further explanation. “Thus, to improve PET performances of an inadequate external ‘skin’, in terms of barrier, it could be joined, using the inner layer, with special additives which can be also catalyzed for transforming it into an active and passive barrier. By adopting technical solutions, it is possible to increase its barrier properties, in case of sparkling water specifically regarding CO2 retention, this could be obtained adding nylon with a different formulation and percentage for creating a very strong passive barrier and, where needed, also active barrier. Through this better barrier performance, for example with sparkling water, we can extend the shelf-life for a longer period, meeting brand needs for exporting product in other countries, where a good portion of time is spent in transport.” The multilayer structure provides a more effective barrier to CO2 than a traditional monolayer blend; multilayer solutions represent a massive growth opportunity for beverage brands including dairy, thanks to the improved and diversified barrier performance that addresses the practical and environmental concerns of brands and their consumers.
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