KROENERT renews the Technology Center with WEKO

KROENERT provides in its Technology Center in Hamburg a unique service. Its features and equipment make it to one of the largest test facilities for the coating of web-shaped materials: a great variety of processes for coating and lamination from roll to roll are available.

Customers have the opportunity to test coating and drying processes for different products and with different materials and to optimize all processes and parameters before investing in a new production line. Thanks to continuous internal research and development as well as cooperation with universities, institutes and key suppliers the Technology Center is always at the cutting edge of technology. Recently the remoistening of WEKO was renewed and replaced by a WEKO-SIGMA rotor carrier to offer customers the best possible results. Paper fibers that have shrunk due to drying, lead to wavy and curled papers with an unsightly look. Targeted remoistening relaxes the paper fibers. This ensures flatness, avoids static charges, ensures high product quality, and maximizes the processing speed.

Paper is a “living” product that cannot be standardized and whose behavior can never be fully predicted in the different processing processes. After all, paper essentially consists of cellulose. When moisture is absorbed, these fibers expand by up to 25 percent in width and only insignificantly in the longitudinal direction. In the same way they contract when moisture is lost, for example due to the effects of heat. Depending on the composition and manufacture, each paper has a defined moisture level before processing, which is based on the ambient climate. However, depending on the climatic conditions in the process, this is sometimes subject to severe fluctuations. An highly effective measure to return paper to its original properties at the end of the processing process after a fixing or drying procedure is paper conditioning by remoistening. In the future, KROENERT customers will be able to fall back on the optimized technology from WEKO and benefit with better results.