Mink spreader rollers for wrinkle-free and high-quality material feed in the corona unit
A key factor in corona treatment is the wrinkle-free feeding of materials to the corona unit. Creases in the web can lead to inadequate surface treatment as they impair the correct alignment of the materials. This inadequate treatment can later result in quality problems, for example during printing. It is therefore very important to ensure that the materials are fed evenly and without creases.
Another problem we can encounter is the occurrence of an air gap between the film and the counter cylinder. At the points where such an air gap occurs, the subsequent treatment is carried out on the wrong side. This can also manifest itself in quality problems in later processes, which only become visible during further processing.
To counteract these challenges, we recommend the use of a dissipative Mink spreader roller. This can not only help to minimise creases, but also effectively dissipate the electrostatics that form on the fabric web during corona treatment. However, it should be noted that the Mink spreader roller should be installed at a sufficient distance from the corona outlet to avoid possible unwanted reactions with the ozone that is not extracted. In this way, the electrical charge on the film can be optimally dissipated, resulting in an improved surface finish and ultimately a higher print quality.
Optimising surface treatment, for example in print production, is an essential step in ensuring consistently high product quality and reducing rejects and complaints.
