This is allowing heat-sealing of vertical form-fill-seal (VFFS) paper bags for the first time.
The solution depends on optimised paper from Swedish paper supplier Billerud Korsnäs. Using its high durability Axello Zap paper in a VFFS module from Bosch Packaging Technology, allows for a sealing agent to be applied to a ‘minimal surface area.’ This retains the monomaterial property of the paper bags, making them much easier to recycle at end of life than coated papers or polymer alternatives.
Billerud cites it own life cycle analyses that shows an Axello Zap paper bag has a carbon footprint 65% lower than a plastic one. The dust-tight sealing used with powdered goods like flour, sugar or grains is important for retailers. It prevents dust from these foodstuffs escaping the package and dirtying the shelves of supermarkets.
The new packaging machinery was announced by the partners on 1 June. It is a refined version of Bosch’s existing VFFS Zap equipment. Joachim Dittrich, head of liquid food at Bosch, says: ‘This revolutionary concept would not have been implemented without the collaborative effort of both companies. Together we have developed a solution that will change the packaging market.’
Ole Paulussen, sales director at Billerud Korsnäs, adds: ‘The combination of the strength, flexibility and stiffness of Axello Zap paper fits perfectly with Bosch’s technology.’
The partners believe the new Zap platform will be able to displace existing technologies in this segment that rely on gluing premade bags or forming paper bags on mandrel wheel equipment.
The new solution can be developed to extend VFFS in paper to a number of formats – including pillow, gusseted and block bottom bags; with gable or flat top closures – extending the options available to brand and converters.
This article comes from Food Contact World, which provides exclusive news and analysis on developments in digital print trends, markets, and technologies.