Extrusion International 5-2025

19 Extrusion International 5/2025 Green Line & Digital Standard Data Interface – Key Innovations for Film Stretching Lines Greenline for saving energy and raw materials – The Greenline concept for BO systems aims to maximize ef ciency. The core elements are: • Solutions for PCR use: After years of R&D projects, with the aim of sig- ni cantly increasing the proportion of recycled polypropylene in the production process for BOPP lms, a milestone has been reached in close cooperation with the entire value chain to further close the loop for BOPP lms. • Direct uff dosing: Higher produc - tion/material ef ciency with an ad - vanced solution to increase direct uff dosing. New software solutions now allow the maximum possible amount of production waste to be fed inline into the BO process at any given time. This also reduces energy consumption as this waste does not have to be re- granulat • Heat recovery unit 2.0: This solu- tion maximizes energy ef ciency and signi cantly reduces operating costs by capturing and reusing waste heat more effectively than ever before. The energy-rich exhaust air is fed into the heat recovery unit, where thermal energy is transferred to the fresh air drawn in via a special heat transfer medium. • Exhaust air puri cation system integrated into the BO process from a single source and ideally coordi- nated. In the rst stage, the exhaust air is cleaned using a scrubber; in the second stage, gaseous hydrocarbons are separated from the exhaust air using an electrostatic precipitator. • High-temperature heat pump to improve waste heat recovery. This patented solution uses waste heat after passive heat recovery at a low energy level and raises it to a usable energy level. This reduces operating costs and signi cantly improves the CO2 balance. • 12m line concept: Increased pro- ductivity and ef ciency for the lowest speci c energy consumption. Customised extrusion solutions for new pipe products. www.conextru.eu | dobrowsky.j@conextru.eu Battery separator lm production line_ Brückner Maschinenbau