Heidelberg and Solenis have collaborated on a process said to enable the ‘industrial, partial and cost-effective’ application of barrier coatings to paper packaging, due to be presented at Fachpack 2025 in Nuremberg.
Heidelberg has integrated Solenis’ technology into its flexographic web printing process with the Boardmaster. During the ongoing process, the barriers are transferred to the paper web with precise registration only at the necessary points.
The companies say the main challenge was finding suitable materials that act as a barrier to water, water vapour, hot and cold liquids, oils, and fats, while also fulfilling sustainability requirements. The aim of the collaboration is to utilize the individual Boardmaster assemblies for applying Solenis barrier coatings, in order to make the process technology quickly and easily available to packaging producers.
In related news, Smart Planet Technologies has released a biopolymer version of its EarthCoating barrier coating, combining a biobased PLA resin with a ‘specialized mineral blend’ to produce both compostable and recyclable paper cups. The mineral content is said to enable the coating to be removed in the same way as clay fillers, which are already used in paperboard and designed for removal during the recycling process.
Lecta has introduced its Linerset FP barrier base paper for converters and printers, designed for flexible packaging and seeking to offer a strong translucent alternative for bags, pouches and wrapping applications. Lecta says the material is suitable for a wide range of applications including food and industrial packaging and is available in a variety of grammages (40, 45, 50, 56 and 78 g/m²).
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