From the Sector

Digitale Technologien können natürliche Ressourcen in der Produktentwicklung und -nutzung sparen. Die aktuelle Kurzanalyse „Digitale Technologien für die Entwicklung ressourceneffizienter Produkte und Services“ des VDI Zentrums Ressourceneffizienz (VDI ZRE) zeigt, wie die Möglichkeiten der Digitalisierung für eine ressourceneffiziente Entwicklung von Produkten und Services genutzt werden können.

Digitale Technologien machen die Entwicklung von Produkten in vieler Hinsicht effizienter. Grundlagen sind ein kontinuierliches Datenmanagement und die Kommunikation von Maschinen untereinander. Zum Beispiel begleiten digitale Zwillinge Produkte im Idealfall über den kompletten Lebensweg und erfassen dabei u.a. das Nutzungsverhalten. Bei der Neu- und Weiterentwicklung von Produkten können diese Daten dann genutzt werden, um Testschleifen digital zu simulieren. Dank weniger physischer Prototypen wird Zeit und Material bis zur Herstellung des gewünschten Produkts eingespart.
 
Basis für die Entwicklung neuer Produkte und Dienstleistungen mit Hilfe von digitalen Technologien sind Daten. Diese entstehen durch die Vernetzung von Objekten und Menschen im Umfeld der Industrie 4.0. Informationen, z.B. aus der Nutzungsphase oder der Produktion, ermöglichen Rückschlüsse, die u.a. auch für die Neu- oder Weiterentwicklung von Produkten und Dienstleistungen nützlich sind. Gleichzeitig gilt es aber, mit der großen Komplexität der Daten und Optimierungsmöglichkeiten umzugehen.
 
Bei der Implementierung digitaler Technologien in der Produkt- und Serviceentwicklung ist eine schrittweise Herangehensweise für Unternehmen empfehlenswert. Zunächst müssen sämtliche in der Wertschöpfung anfallenden Daten möglichst präzise gesammelt und verwaltet werden. Erst im Zusammenspiel zwischen einer zur Datenerfassung und Weiterverarbeitung notwendigen Infrastruktur und den dadurch zur Verfügung stehenden Informationen können digitale Technologien Entwicklerteams bei der ressourceneffizienten Entwicklung von Produkten und Dienstleistungen unterstützen.

Die Kurzanalyse „Digitale Technologien für die Entwicklung ressourceneffizienter Produkte und Services“ zeigt verschiedene zur Verfügung stehende digitale Technologien und damit verbundene Methoden in der Produktentwicklung auf und bewertet diese im Sinne der Ressourceneffizienz. Praktische Beispiele zeigen außerdem, wie Unternehmen bereits heute natürliche Ressourcen dank Innovationen in der Produktentwicklung einsparen können. Erstellt wurde die kostenlose Kurzanalyse im Auftrag des Bundesumweltministeriums. Sie steht zum Download zur Verfügung.

The European Pultrusion Technology Association (EPTA) has published a report from its latest conference, which focuses on advances in sustainability and recycling.

More than 130 professionals from the global pultrusion community gathered at the 16th World Pultrusion Conference in Paris on 5-6 May 2022. Organised by EPTA in collaboration with the American Composites Manufacturers Association (ACMA), the event featured 25 international speakers sharing insight on market trends, developments in materials, processing and simulation technologies, and innovative pultruded applications in key markets such as building and infrastructure, transportation and wind energy.

‘Bio-pultrusion’:  
Composites based on natural fibres offer a number of benefits, including low density and high specific strength, vibration damping, and heat insulation. The German Institutes for Textile and Fiber Research Denkendorf (DITF) are developing pultrusion processes using bio-based resins and natural fibres. Projects include the BioMat Pavilion at the University of Stuttgart, a lightweight structure which combines ‘bamboo-like’ natural fibre-based pultruded profiles with a tensile membrane.

Applications for recycled carbon fibre (rCF):
The use of rCF in composite components has the potential to reduce their cost and carbon footprint. However, it is currently used to a limited extent since manufacturers are uncertain about the technical performance of available rCF products, how to process them, and the actual benefits achievable. Fraunhofer IGCV is partnering with the Institute for Textile Technology (ITA) in the MAI ÖkoCaP project to investigate the technical, ecological and economic benefits of using rCF in different industrial applications. The results will be made available in a web-based app.

Circularity and recycling:
The European Composites Industry Association (EuCIA) is drafting a circularity roadmap for the composites industry. It has collaborated with the European Cement Association (CEMBUREAU) on a position paper for the EU Commission’s Joint Research Centre (JRC) which outlines the benefits of co-processing end-of-life composites in cement manufacturing, a recycling solution that is compliant with the EU’s Waste Framework Directive and in commercial operation in Germany. Initial studies have indicated that co-processing with composites has the potential to reduce the global warming impact of cement manufacture by up to 16%. Technologies to allow recovery of fibre and/or resin from composites are in development but a better understanding of the life cycle assessment (LCA) impact of these processes is essential. EuCIA’s ‘circularity waterfall,’ a proposed priority system for composites circularity, highlights the continued need for co-processing.

Sustainability along the value chain:
Sustainability is essential for the long-term viability of businesses. Resin manufacturer AOC’s actions to improve sustainability include programmes to reduce energy, waste and greenhouse gas emissions from operations, the development of ‘greener’ and low VOC emission resins, ensuring compliance with chemicals legislation such as REACH, and involvement in EuCIA’s waste management initiatives. Its sustainable resins portfolio includes styrene-free and low-styrene formulations and products manufactured using bio-based raw materials and recycled PET.

Global energy consumption reached a record high in 2019, following a 40-year trend for rapidly increasing energy demand that was only halted by the Coronavirus pandemic. It’s estimated that more than 80 % of this energy is still generated from fossil fuels that produce CO2 emissions and contribute to climate change. Renewable energy offers a solution to this problem, but saving energy whenever possible is an even more effective approach. That are the motives for Trützschler to develop the intelligent card TC 19i, which sets a new benchmark for energy-efficient carding.

The intelligent Trützschler card TC 19i features the unique T-GO gap optimizer, which continuously and automatically monitors and adjusts the carding gap to an ideal position during production. Innovative drive- and air technology further reduce energy consumption of the TC 19i.

The most energy-intensive elements in a carding machine are the drive, the dust suction process and the compressed air system. Permanent suction is needed to remove dust and cotton waste in key places. Smart optimization of these areas has made the intelligent card TC 19i a benchmark for energy efficiency in carding because it uses less electricity, lower suction pressure and less compressed air than other machines, while providing the highest production rates currently available on the market.

In a head-to-head comparison between the TC 19i and a high-performance card from a competitor, the TC 19i consumed at least 10 % less energy per kilogram of material produced when manufacturing rotor yarn from a cotton and cotton waste mix. The compared energy values included electric power consumption and energy required for suction and compressed air and were measured in both cards at the same production of 180 kg/h. A 10 % reduction in energy per kilogram of sliver produced, as proven here by TC 19i, can have a significant impact on a spinning mill’s profitability; annual savings worth a five-digit sum are frequently possible, depending on factors such as the output of the mill. The customer trial also showed TC 19i’s excellent reliability at the customer’s usual production rate of 180 kg/h, and even demonstrated stable performance at 300 kg/h in the same application. Because the TC 19i with T-GO gap optimizer realizes maximum production rates at no compromise in quality, manufacturers can reduce their energy demand and investment costs drastically: Less machines are needed to achieve the desired output, and energy consumption per production is reduced.

This improvement was made possible by a long and sometimes challenging innovation process involving mathematical models of air flows, as well as flow simulations and prototypes. By combining the final flowoptimized parts in the TC 19i, Trützschler’s experts have developed a card that operates with suction pressure of just -740 Pa and with an air requirement of only 4200 m³/h. This translates into 40 % less energy demand for air technology compared to the latest high-performance competitor model.