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TRESU Introduces Customized Printing Unit for Integration into Converting Machines for Sanitary Products

Friday, January 23, 2015

Press release from the issuing company

Kolding, Denmark - Danish flexo technology provider TRESU Group has introduced a flexo printing solution to be integrated inline with converting machines for disposable sanitary napkins.  The unit, custom-developed following long-term collaboration with leading global sanitary napkin brand owners, applies patterns on the inside of the napkin.

Allan Sander, Sales Director MBA, TRESU Solutions comments: "Demand for an efficient means of applying patterns has arisen following research that shows increased consumer loyalty to brands featuring printed designs. The customised printing integration   system enables the personal hygiene industry to achieve this, while maintaining a cost-controlled, flexible, single-pass operation.”      

Built to accommodate different web-fed materials, the unit comprises up to four water-based colours, a hot air dryer and, at the embossing point, a register guidance camera. The printing solution formation contained within a module offers both a compact footprint and an operator-friendly design.

Located at point of embossing, the register guidance system ensures synchronisation of the printed pattern with the crease in the centre of the napkin, at speeds of up to 400 metres per minute (approximately 2000 pieces per minute). Using the converting machine interface signals as point of reference, the control module influences the servo motors to ensure accuracy is maintained on-the-fly throughout the production run.   Servo drives ensure automatically controlled, precise print speed and ink flow, so that operation without in-house flexo experience or handling is possible.

The integration unit includes TRESU's F10 iCon ink supply system with automatic cleaning, to constantly feed the printing units and maintain optimum viscosity, temperature and pressure. Sealed, pressure-controlled chambered doctor blade systems enable direct, foam-free transfer of ink or coating to the anilox rollers, ensuring a consistently clean printed image.  

The system is optimised for fast job changes. A control system stores and, in the case of repeat jobs, instantly recalls job recipes, so no re-entry of ink and calibration data is needed.  At the installation stage, the TRESU technical team works with the customer to build a unique database of recipe settings for each job, including, among others, impression settings, print levels, flow rate, air velocity, temperature and register coordinates.

The ability to seamlessly integrate the printing operation into the existing converting and assembly line means that customers can avoid the costs and lengthy lead times associated with outsourcing. 

‘TRESU collaborated closely with the customer's research and development division at every step from the concept stage, to customise the machine to suit production requirements and skills levels,' stated Mr. Sander.

'The projects have been a large success for the customers, with integrations of our high level printing technology into a two-digit number of hygiene converting lines at locations in Europe, USA and Mexico. From TRESU's perspective, we are proud to have developed the requested solution on time despite demands on safety, process technology and a tight time frame.'


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Label & Packaging Editor

Jennifer Matt

Patrick Henry, Section Editor
Pat has covered graphic communications for nearly 30 years as a reporter, an editor, and a commentator.


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