Thickness-reduced thermoforming sheets at the K 2022

The triple bubble technology for the production of biaxially stretched blown film is named after the serial arrangement of three bubbles. In the first, the film is quickly cooled with cold water using water quench technology. Kuhne has further optimised this process for the large-scale systems, thus enabling the efficiency-enhancing increased cooling rates. They Effectively prevent crystallisation processes as a prerequisite for uniform stretching in the subsequent, second stage. The high orientation achieved at the molecular level improves the mechanical and barrier properties of the films. Thermal relaxation in the third bubble is used to achieve the desired thermoforming behaviour.

Triple bubble systems from Kuhne currently enable the production of films with up to 17 layers at widths of up to 3,000 mm double flat (6,000 mm film width) and a production output of over 2,000 kg/h. The systems are suitable for processing all common plastics such as PE, PP, PET, PA, EVOH, COC, EVA, EMA, ionomer, etc. Depending on the weight of the packaged goods, maximum thickness reduction is also possible with thermoforming recipes that contain far less than 10 per cent PA and EVOH and can be run without problems and with good performance. Furthermore Monomaterial solutions based on PET, PA, polyolefins and other polymers possible.