A 3-head coating line has established itself as the standard, in which three individual layers can be produced one after the other. Here, one PVC layer is applied at a time, gelled and the product cooled down again, followed by the next coating. The production of such a multi-layer composite product is correspondingly energy intensive.
OLBRICH has now successfully succeeded in reducing the number of these individual production steps. Thanks to using a dual-layer slot die, the coating of function-independent product layers can be combined to only one coating step. These layers are then simultaneously gelled together in only one oven instead of two. Multiple coating offers enormous potential in this product area. When planning a new plant, the new line layout can be tailored accordingly. This significantly reduces investment costs and the required installation space. Because one coating machine, one gelation oven, one cooling area and pipes and ductwork can be saved. The new technology can be integrated into existing machines, too.
However, the biggest advantage is the resulting energy saving, which will probably become increasingly important in the future. The energy of one gelling process, subsequent cooling, electrical motors, the exhaust air volume of one gelling oven, can be saved. This very quickly reduces the energy consumption of the entire line by 15-25% compared to previous line layouts.
Decisive advantages:
- Increased process efficiency
- Less energy consumption
- CO2 footprint reduced
- Product quality improved by perfect bond of layers
- Reduced CAPEX
- Retrofit possible
