Customer story

At KROENERT, we see it as one of our core tasks to enhance or support the effectiveness of processes. In the course of discussions with a customer in the label industry, the idea came up of simultaneous coating on both sides. Coming up with an excellent solution for this was a case for the experts at KROENERT.

The idea: simultaneous double-sided coating.

It sounded simple, but it posed quite a challenge. Investing much experience and technical innovation, the KROENERT team realised a novel solution. An individual coating unit was developed which enabled coating on one side or both sides. Different coating processes could be used, too. A non-contact web deflection system was installed for what was now a double-sided coating process. Further contactless transport has already been standard practice in our air flotation dryers for years.

The benefits were impressive.

With simultaneous double-sided coating, the substrate was heated only once in the dryer and then cooled, thereby reducing energy costs. The double-sided coating also ensured that the paper substrate had no curl and prevented over-drying on one side. This meant that there was no need for remoistening. 

Another advantage: simultaneous coating of the front and reverse sides significantly reduced the drying out of the paper substrates, so the coating line could be significantly shortened so as to save space. It also meant that fewer staff were required, since one operator was now able to monitor two coatings simultaneously.

This made a big difference. 

The overall result was a significant increase in line productivity – and joint success for KROENERT’s engineers and the customer.  

The innovative double coating unit found its way into the KROENERT portfolio and can now be incorporated into new lines or retrofitted into existing lines. The process of double-sided siliconisation is particularly suitable for paper substrates that are used as release liners for adhesive tapes and also graphic products, for example.

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