For almost 30 years, SN, the world market leader for horizontal rotary machines based in Wipperfürth, Germany, and Herrmann Ultraschall have been working together successfully on ultrasonic sealing of flexible pouch packaging, such as stand-up pouches. SN uses Herrmann's special sealing technology especially in applications such as wet pet food, liquids, sauerkraut, and hot peppers.
The collaboration began in 1996 with a request for reliable sealing technology for stand-up pouches containing clinical food products. The technical challenge at the time was sealing under contamination in combination with high cycle rates. Thermal welding processes were increasingly reaching their limits, while ultrasonic sealing technology was able to play to its strengths.