Alternative materials for beverage containers

The demands on packaging solutions are constantly changing – driven by regulatory requirements and a growing environmental awareness among consumers. As part of its R&D activity, Krones has devoted considerable attention to how alternative container materials might be processed reliably and efficiently on both existing and new machines.

With the LinaFlex eSync, Krones is rethinking the layout of canning lines – continuous single-lane transport replaces wide mass conveyors.

Krones’ teams have done extensive testing to analyze the technical feasibility of various materials as well as their ecological characteristics and material stability. The following criteria formed the basis of their assessments:

•           Recycled (recovered materials)

•           Recyclable (packaging that can be recycled)

•           Reusable (containers that can be used over and over again, such as returnable bottles)

•           Renewable (materials made from raw materials that are either renewable or have a natural regenerative capacity)

The focus was on various materials that might be suitable for producing containers for liquids. Among them was the moulded-pulp bottle, which is made from a fibrous material, typically cellulose or other plant-based fibers. It is bio-based, biodegradable and recyclable. Containers made from pulp have particular requirements in regard to their manufacture, handling in the production line and process reliability, for instance with respect to stability, moisture-resistance and precision of form.

However, the molded-pulp bottle is but one of a broad spectrum of alternative container materials that Krones is investigating as part of its systemic research on the topic. Other materials include bio-based and biodegradable plastics.

Various factors influence material selection

The choice of suitable packaging will depend on various factors, including the physical characteristics of the product to be filled, logistical considerations, regional recycling infrastructures and consumer preferences.

The aim is to identify and continually develop packaging solutions that meet ecological criteria and at the same time can be reliably processed on Krones machines – whether on existing lines or new ones (brownfield or greenfield). The insights and knowledge gained will then go right into the further development of technology platforms and will help shape the industry’s long-term direction.