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FEATURE Coating & Laminating Converters gather in Italy to see

BOBST’s new aluminium coating line BOBST presented its latest developments in gravure technology for coating applications at its symposium and open house event held at the Bobst Italia factory

A new aluminium coating line at Bobst Italia’s production plant in San Giorgio Monferrato, Italy,

ready to be delivered to its new owner in Europe, provided BOBST with the perfect opportunity to hold a major two-day event that would gather local and international players from across the converting industry. The symposium sessions were held at a

conference venue close to Bobst Italia’s facility. BOBST specialists and guest speakers from Taghleef Industries and Actega Rhenania addressed the technical advances and opportunities that the latest coating and drying technologies, substrates and coating formulations offer to meet the challenges faced by today’s converting industry. Detlef Merklinger, head of Product Line Coating for BOBST, and Michele Vitiello, managing director of Bobst Italia, were there to talk about the company’s Coating Product Line. BOBST’s core competences in coating are found at Bobst Italia, which is also the Group’s centre of excellence for gravure printing, laminating and extrusion coating technologies. The current BOBST range of coating machines reflects over 50 years of know-how and experience that the company boasts in coating applications and the numerous installations that have been put into operation worldwide since 1960. Gianni Zanatta, product manager, Product Line Coating, Bobst Italia, presented BOBST’s range of gravure coating systems, from the traditional open doctor blade system to the state-of-the-art pressurised enclosed chamber doctor blade system. Based upon the analysis and comparison of the performance of numerous parameters, including speed, changeover time and cost, the advantages of the pressurised enclosed doctor chamber system were demonstrated.

A dry run demonstration on the ROTOCOAT aluminium lacquering line at the factory site

Mirko Rinco, research and development manager, Product Line Coating, Bobst Italia, spoke about the development of a floatation and a roller type dryer for temperatures over 300 degrees Celsius. This dryer for high temperatures was also showcased on the ROTOCOAT aluminium lacquering machine shown during the open house event. The design criteria, working principle, technical data and advantages of accessibility and maintenance were presented and analysed to demonstrate how BOBST dryers provide drying efficiency and web stability. Alexandre David, sales manager, Product Line Coating, Bobst Italia, concluded the presentations by introducing the aluminium lacquering machine. This ROTOCOAT machine was developed to handle a number of different applications: wet lamination for the production of cigarette inner liners; two- stage lacquering for products like foils for chocolate; and three-stage lacquering for products like foil for cheese. The line has also been pre-prepared to include dry lamination in the future, in order to expand the range of applications that can be run on the machine. These presentations were complemented by a speech from Emanuela Bardi, junior product manager at Taghleef Industries, who looked into bi-oriented polypropylene films and discussed the importance of film coatings, from sealability and machinability

16 November 2015

coatings, through to barrier, conversion, functional and enhancing coatings. For Actega Rhenania, a company of the Altana Group, Michael Lucas, head of R&D, and Stefan Brandhoff, technical and area sales manager, presented the company’s coating formulations for substrates in the packaging and printing market, and applications for flexible packaging for consumer goods, pet food and pharma. In the afternoon the event moved to BOBST’s production plant to see the ROTOCOAT aluminium lacquering machine, a double-deck, 45m long, eight metre high production line. The machine features three coating stations for direct gravure coating with closed chamber doctor blade and semiflexo coating, along with three dryers which can reach up to 350 degrees Celcius air temperature depending on the application requirements. The demonstration on the ROTOCOAT was a dry run to exhibit the line’s web handling capabilities in processing a sensitive 20 micron, 1,020mm-wide aluminium foil reel at 400m/min with defect-free rewinding. The performance of BOBST gravure coating was then shown on the CL 850D coating and laminating line in Bobst Italia’s Competence Centre.

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