Extrusion Asia Edition 2-2023

43 Extrusion Asia Edition 2/2023 挤出薄膜 使用回收物料最大限度地减少了薄膜 的碳足迹 Film Extrusion: The Use of Recyclates Reduces the Carbon Footprint of Films the Most 什么会影响塑料薄膜的碳足迹？，哪里有最 大的减少潜力? 薄膜拉伸线供应商布鲁克纳 机械制造有限公司（Brückner ）和能源咨询 公司envistra在一项研究中调查了这个问题。 来自东欧一家正在运行的薄膜生产工厂的数 据，记录了该工厂的能源消耗和排放，以及 原材料生产和运输中的具体排放。 What influences the carbon footprint of a plastic film and where is the greatest poten- tial for reduction? Brückner Maschinenbau, supplier of film stretching lines, and the energy consulting company envistra investi- gated this question in a study. Based on the data from a running film production plant in Eastern Europe, the energy consumption and emissions of the plant as well as the specific emissions from the production and transport of the raw materials were recorded. 结果:每生产一平方米双向拉伸聚丙烯薄膜(BOPP)，生产 工厂的能源相关二氧化碳排放比例约为12%，而原材料制造的 二氧化碳排放比例略低于72%。剩下的16%来自包装、运输， 在这个例子中，是热能回收。这清楚地表明，减少二氧化碳排 放的重要手段在于使用的原材料。 通过使用30%的回收料，也有可能将总二氧化碳排放量 减少20%，从生产每公斤的薄膜排放2.744公斤二氧化碳减少 到排放2.193公斤。如果你考虑到现代布鲁克纳薄膜拉伸系统 每小时生产薄膜约8000公斤，使用回收料时减少的二氧化碳 排放甚至更惊人，即每小时生产可减少二氧化碳排放4.4吨。 布鲁克纳机械制造有限公司的总经理/首席技术官Michael Baumeister说:“对我们来说，不断减少石化原材料的使用和降 低薄膜生产中的能源消耗是拉伸技术进一步发展的传统目标。 多年来，我们一直致力于在研究和开发增加回收料的利用。在 实际生产条件下的研究现在是另一个重要的步骤。” 布鲁克纳机械制造有限公司的工艺工程师Steffen Kuhnigk 已经积极参与了几项合作和倡议，并希望通过目前的研究结果 说服新的合作伙伴:“含有回收物料的薄膜，其回收料的质量、 可用性和新的应用领域必须共同发展。要做到这一点，我们需 要价值链上的所有成员共同参与，包括从回收商、原材料制造 商到品牌公司和零售商。政治和立法也必须参与进来。” R esult: Per square meter of biaxially oriented polypropylene film (BOPP) produced, the proportion of energy-related CO 2 emissions from the production plant is around 12%, while the CO 2 emissions from the manufacture of the raw materials are just under 72%. The remaining 16% is accounted for by pak- kaging, transport and, in this example, thermal recycling. This clearly showed that the greater lever for reducing CO 2 emissions lies in the raw materials used. By using 30% recyclate, it was also possible to reduce the total CO 2 emissions by 20%, from 2.744 kg to 2.193 kg per kilogram of film produced. If you consider that modern Brückner film stretching systems produce around 8,000 kg per hour, the re- duction in CO 2 emissions when using recyclate is even more stri- king, namely with 4.4 tons fewer emissions per hour of production. Michael Baumeister, Managing Director/CTO of Brückner Ma- schinenbau: "For us, a continuously declining use of fossil raw materials and ever lower energy consumption in film production are traditional goals in the further development of stretching technology. We have also devoted ourselves to the increased use of recyclates in research and development for years. The study under real production conditions is now another important step.” Steffen Kuhnigk, process engineer at Brückner Maschinenbau, is already active in several cooperations and initiatives and hopes to convince new partners with the results of the current study: “Recyclate quality, availability and new areas of application for films containing recyclate must be developed together. To do this, we need all members of the value chain, from recyclers and raw material manufacturers to branded companies and retailers. And politics and legislation must also be on board.” ➠ Brückner Maschinenbau GmbH Königsberger Str. 5-7, 83313 Siegsdorf, Deutschland www.brueckner.com