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July 11, 2022 05:53 AM

Ulrich Reifenhäuser: 'We need to reinvent plastics'

Sustainable Plastics
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    When the global plastics industry meets at K 2022 in Düsseldorf, Germany, in October, it will be showing how it has put into practice ideas about the circular economy that were discussed at the show in 2019.

    In an interview by the German machinery group VDMA leading up to K, Ulrich Reifenhäuser, chief sales officer of Reifenhäuser Group and chairman of the exhibitor advisory board of K 2022, talks about the need for a plastics industry that is fit for the demands of the future.

    Q: What problems does the plastics industry face today?

    Reifenhäuser: In recent years, plastic has fallen into disrepute, because of waste issues. We all have the pictures of marine litter in our minds. Used plastics are not really being handled well anywhere in the world. In many places they are simply thrown away. Plastic itself has many advantages: it is very durable, very flexible, very waterproof and very light, which is why it is so successful. But these advantages are reversed where waste is concerned. Plastic floats, it does not decompose, it does not dissolve. If, in addition to function and cost, recyclability had been seen as an important criterion from the beginning, we would have fewer problems, and at least 80 per cent of plastics would already be recyclable. Today, they are not recyclable to this extent. The long pursuit of optimal function has even produced plastics that are difficult or impossible to recycle, such as multi-layer films. I am convinced that we can and must change this.

    Q: What is the appropriate course of action in your opinion?

    Reifenhäuser: Ultimately, we have to reinvent plastics. I see the plastics industry at a crucial turning point. It has to show that it can turn things around, actually be sustainable and enable recyclability. In short: new plastic products must be created that meet the demands of the environment. The way to achieve this is through the circular economy. When plastics are recycled, waste is avoided by extending the lifespans of the products and allowing individual components to flow back into new production cycles. I consider establishing this cycle to be the main task of the plastics industry.

    Q: What role does plastics machinery engineering play in this?

    Reifenhäuser: As a machine builder, we can go into the processes. We can develop technologies that produce recyclable plastic and save material. But the initiative for these developments must come from the users, the brand owners. I will go one step further. The best thing would be for the legislator to make specifications. I would like to see a recycling quota for every plastic product. Fortunately, this is already being discussed extensively at EU level. Once specifications of that nature are in place, it will be up to the mechanical engineering industry to develop process technology to meet those specifications.

    Q: What contribution does the Reifenhäuser company make?

    Reifenhäuser: We are pursuing several approaches. One is to process low recyclate qualities easily and economically into high-performance products, and to be able to increase the recyclate content. For this purpose, we have developed a new extrusion technology we call EVO Fusion that can melt different polymers together in the extruder. Among polymers, there are products, such as PET and PE, for example, that previously could not be processed together because they have different melting temperatures. While one has not yet melted, the other is already burned. EVO Fusion, however, now allows them to be melted together. We use it to feed used plastic products into the extruder to make a new film. This is not a film for high-end applications, such as food packaging. But it can be used very well as construction film, as covers in agriculture, or to make rubbish bags. This film has high strength and density. So, with EVO Fusion, you can recycle and reuse products where that was not possible before.

    Q: Are there any other methods available?

    Reifenhäuser: We are also looking at the issue of saving materials. The world can't do without plastics, but you can try to reduce the use of plastic while maintaining functionality. We call this downgauging. We’ll demonstrate this by taking the example of a spunbonded fabric, which is a fabric for nappies or medical products. We have reduced the amount of material used from 21 grams per square meter to 12 grams per square meter, plus we are about to reduce it to well under ten grams. In that case, we would have a product that fulfills the same function with half the material quantity.

    Q: What role does digitalization play in such improvements?

    Reifenhäuser: Digitalization has become enormously important in the plastics industry in recent years, and it has become increasingly better. Through digitalization, processes are possible today that are no longer comparable with the automation capabilities of perhaps ten years ago. Processors are so much faster and more precise, that we can achieve much greater benefits with today's digitalization. For us in mechanical engineering, digitalization means the possibility to optimally control processes. The extrusion process, for example, is perfectly monitored and also documented. We even go one step further: we focus on the empowerment and independence of operators – by deliberately turning away from usual manufacturer-centric approaches and offering a digital solution to help producers of films or nonwovens to increase their production efficiency independently and sustainably. All customers, regardless of company size, therefore benefit from a new dimension of process transparency, which for the first time includes all production equipment manufacturers and equipment types.

    Q: 2022 is a K year. What has changed since the last K 2019?

    Reifenhäuser: Three years ago, there was a lot of talk about the circular economy at the K, and the first approaches showed what could be possible. In 2022, we are no longer talking and exchanging ideas. Today we already have new technologies, new products, and new processes that can meet the demands of the environment. And this is the path we need to pursue. We are facing a great challenge. There is uncertainty, a lack of direction, and unanswered questions on many issues, which cannot be put off. Now is the time to act and turn challenges into opportunities, which is why our chosen trade fair motto is: The Time is Now.

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