From the Sector

• Joint proposal of TUD and RWTH Aachen University

On 29 May, the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) decided to fund the Collaborative Research Centre (CRC)/Transregio 280 "Carbon reinforced concrete" at Technische Universität Dresden, short TUD, and RWTH Aachen University with the participation of the Institut für Textiltechnik, short ITA, with 12 million euros over the next four years.

The CRC/Transregio 280 “Design Strategies for Material-Minimised Carbon Reinforced Concrete Structures - Principles of a New Approach to Construction” breaks with the traditional way of designing reinforced concrete plants. The interdependence of reinforcement and matrix is being investigated in depth and a completely new design and construction strategy for building with carbon reinforced concrete is being developed.

Carbon reinforced concrete enables completely new design and construction possibilities in the building industry. The reasons for this are its very high strength and the possibility of a very low concrete overlay of only a few millimetres, as carbon, unlike structural steel, does not rust. However, the successful use of the new material, which was awarded the German Future Prize in 2016, requires completely new design and production strategies, which are being investigated in the CRC/Transregio.

Up to now, textile reinforcements have been coated and cured prior to component manufacture. This process is called offline consolidation. These stiff semi-finished products are not suitable for the production of complex components based on new, digital and continuous manufacturing processes (including 3D concrete printing and concrete extrusion). Therefore, ITA is investigating in the sub-project B02 of the CRC/Transregio how forming and consolidation steps are shifted in time by prepreg systems into the concreting process and how they can be applied within the new digital continuous manufacturing processes. In addition to established curing mechanisms, such as by heat or UV radiation, new approaches are also being researched. These new approaches include activation via the alkalinity of the concrete, microwaves and induction

The TUD and RWTH Aachen were awarded the grant on the basis of many years of experience in the research field of textile reinforced concrete. The material textile reinforced concrete was developed in two special research areas at both universities from 1999-2011 and was first fundamentally researched.

19 individual institutes are involved in the CRC/Transregio 280. The spokesman of the TUD is Professor Dr Manfred Curbach, the spokesman of the RWTH is Professor Dr Josef Hegger.

Die TEG Textile Expert Germany GmbH hat Teile der Produktion neu ausgerichtet. „Wir fertigen seit Mitte Mai 2020 OP-Mundschutz für Kliniken laut DIN EN 14683“, berichtet Geschäftsführer Timo Fischer. „Die Herstellung erfolgt automatisiert unter Reinraumbedingungen. Wir haben dazu eine neue Produktionsanlage installiert und bislang rund eine halbe Million Euro investiert. Je nach Auftragslage können wir pro Woche mehrere Hunderttausend dieser medizinischen Einweg-Erzeugnisse herstellen.“ Die OP-Masken bestehen jeweils aus einem mehrlagigen Vliesstoff-Verbund, für den mehrere Vliesstoffproduzenten aus Deutschland zuliefern. Den Vertrieb hat der in Deutschland und Österreich agierende Medizintechnik-Großhändler medika Medizintechnik GmbH mit Stammsitz im fränkischen Hof übernommen.

Lieferant der neuen OP-Mundschutz-Anlage, der bei TEG weitere folgen sollen, ist die Fischer Automation GmbH, Köditz (bei Hof). Als weitere Reaktion auf die Corona-Krise fertigt diese Firma gegenwärtig für TEG eine Anlage, die ab Juni 2020 die Herstellung von Atemschutz-Faltmasken der Kategorie FFP2 ermöglichen wird. Nach Angaben von Timo Fischer investiert die TEG GmbH, die bisher vor allem als Automobilzulieferer für Textil- und Vliesstoffbauteile bekannt war, im laufenden Jahr insgesamt rund 1 Mio. EUR in neue Anlagentechnik für Gesundheitsschutz-Erzeugnisse.  Gegenwärtig zählt Unternehmen rund 60 Mitarbeiter. Bei entsprechender Auftragsentwicklung sind in den nächsten Monaten Neueinstellungen denkbar.

• AACOMA - Accelerate advanced composite manufacturing
• EMR Region Belgium, the Netherlands & Germany area hot spot for the future of lightweight materials and technologies

The Euregio Meuse-Rhine provides a huge potential with its many highly innovative, leading companies and especially SMEs which are active in the area of advanced material manufacturing in many industrial sectors, such as Automotive, Aerospace, Electronics, Building and Infrastructure, etc. The advanced material sector is growing, with a consolidated offer, ranging from raw material producers over technology development to production, research and development as well as industrial OEMs.

Interreg Euregio Meuse-Rhine invests EUR 96 million from the European Regional Development Fund (ERDF) in the period 2014-2020. Through the investments in cross-border projects, the European Union invests in the economic development, innovation, territorial development and social inclusion and education of this region.

Project

The Euregio Meuse-Rhine is a potential hot-spot for the further development of advanced material and process technologies. Technical Centers and Institutes around Aachen/Germany, Liège/Belgium and Eindhoven/The Netherlands were awarded with this new project AACOMA.

Innovative material design and advanced manufacturing provide large opportunities for SMEs. The AACOMA project kick-off took place in Aachen at the Campus of the RWTH University of technology in 1 Q 2020. The aim of the project, which is running for 3 years until 2023 with a budget of €3 Mio, is to connect SMEs with innovation hot-spots like institutes and technical centers.
Seven partners from all three regions will carry the project out: Centexbel is the project leader and gets support by University of Liège, Sirris and Flanders Make from Belgium, as well as Fontys University of Applied Science and AMIBM of Maastricht University in the Netherlands and AMAC in Germany.

Statements

Bernard Paquet, Project Coordinator from Centexbel/ Belgium stated:
“Centexbel, with a strong experience in textile and composites, will identify with its Interreg partners and an advisory board of international experts several demonstrators which will enable an accelerated advanced manufacturing of composite parts. This could include new materials and intermediates, high performance additives, bio-based products and new composites by additive manufacturing”.

Michael Effing, Managing Director of AMAC/ Germany said:
“The major goal of the project is to connect around 200 innovative SMEs with each other and establish the links to the world-class institutes in the EMR region. We will facilitate 6 roadshow events, addressing key topics like automated manufacturing, additive manufacturing or bio-based material systems combined with match making and training events. The first roadshow will be held on September 24, 2020 at the Aachen Campus of the RWTH University of Technology.”

Prof. Gunnar Seide from the AMIBM/The Netherlands continued:  
“Our AMIBM offers already an international master program on bio-based materials. The AACOMA project will be an important element for transborder research and will identify new players in the value chain coming from the EMR region. Innovative companies find markets for their new bio-based building blocks, chemicals and polymers. Their success stories and upcoming technological breakthroughs are needed for a sustainable future.”

STAMFORD – German ultralight aircraft specialist Flight Design has chosen Hexcel as its key supplier adopting low-temperature curing prepreg into its aircraft production. Hexcel’s HexPly® M79 Carbon Fiber prepregs deliver a more consistent final product by ensuring constant material quality and processing parameters and produce a lighter and stronger aircraft at a more competitive overall cost.

Flight Design has always relied heavily on composites for its aircrafts’ ultralight construction and turned to long-term composite materials partner Lange + Ritter, part of Hexcel’s European distribution network, when they began searching for a prepreg material solution. Hexcel and Lange + Ritter created several new product codes specifically for Flight Design and then supplied materials for initial handling trials and prototyping. Hexcel’s HexPly M79 low temperature curing out of autoclave solution was first used in the new F2 prototype. As part of its material supply package, Lange + Ritter also sent a team for on-site training and technical support, allowing the Flight Design production team to get up to speed with prepreg as quickly as possible.

HexPly M79 prepregs can be cured at temperatures as low as 70˚C for eight hours or 80˚C for four hours, reducing tooling costs and increasing build rates. When combined with Hexcel’s innovative air venting Grid Technology, HexPly M79 UD carbon tapes can also be laminated with reduced debulking steps to produce void contents <1% irrespective of laminate thickness. With consistently low void contents and improved mechanical properties, designers and engineers are able to further optimize highly loaded composite aerostructures.

As more and more of its composite aircraft parts are transferred to prepreg technology, Flight Design is seeing the benefits of its switch to HexPly M79. Lay-up is cleaner and more precise, low temperature oven curing is quick and energy efficient, and the manufacturing process consistently outputs exceptionally high-quality laminates and components. The long-term strategy is to integrate HexPly M79 across the range, with Hexcel materials lightening the ultralight aircraft at Flight Design even further.

“The materials and technology package from Hexcel and Lange + Ritter has been a big success for us at Flight Design,” comments Daniel Gunther, Managing Director at Flight Design. “When we took the decision to switch to prepreg, we looked at many options but only Hexcel and Lange + Ritter could offer us low temperature out-of-autoclave (OOA) curing, globally respected material quality and the customer service levels we were searching for.”

Center of competence for hygiene established in Wiener Neudorf to support Austria and the EU in the Covid-19 crisis for the industrial production of high-quality protective masks with a monthly capacity of 12 million pieces.

Lenzing AG and Palmers Textil AG found “Hygiene Austria LP GmbH”, in which Lenzing AG holds 50.1% and Palmers Textil AG 49.9%. The newly founded company will start producing and selling protective masks for the domestic and European markets from May 2020.

Over the past few weeks, Lenzing AG and Palmers Textil AG have invested several million euros in a modern production infrastructure at the Wiener Neudorf location and secured the corresponding raw materials for protective masks production. In a first step, the company produces so-called mouth-nose protective masks (MNS) and surgical protective masks of class EN14683. Hygiene Austria LP GmbH plans to increase its capacities to over 25 million masks per month over the next few weeks and to expand this business geographically as well.

The demand for high-quality MNS and respiratory masks for medical personnel is increasing rapidly, and there is real competition on the international market for these products. In order to sustainably secure domestic supply now and in the future and to strengthen the business location, the two companies Lenzing AG and Palmers Textil AG have now set a milestone with their own competence center for hygiene based in Austria.

Hygiene Austria LP GmbH thus makes a significant contribution to combating the Covid-19 pandemic and ensures the long-term supply of these critical goods in Austria in high quality.

Für anspruchsvolle Thermobondingprozesse präsentiert GKD – Gebr. Kufferath AG (GKD) Glashybrid-Gewebebänder von hoher Prozessperformance und Produktqualität. Anwender wählen verstärkt den zunächst als magnetisches Oberband in Doppelbandtrocknern eingesetzten Bandtyp auch als Unterband. Die vollständig mit PFA beschichtete Konstruktion aus Glaslitzen in Laufrichtung und Metalldrähten im Schuss verhindert Anhaftungen. Dadurch sinken Reinigungsintervalle und Stillstände deutlich, während Fertigungsgeschwindigkeit und Standzeiten herkömmliche Maßstäbe übertreffen.

Mit einem Gewicht von nur 1,8 Kilogramm pro Quadratmeter ist die neuartige Bandkonstruktion, so GKD, ein energieeffizientes Leichtgewicht im Trocknerbetrieb. Zugleich steigere die Werkstoffkombination aus Metall und Glasfasern durch eine hochbeständige PFA-Beschichtung deutlich die Prozesseffizienz. Sie schütze– auch beim Einsatz von BiCo-Fasern – Drähte und Kreuzungspunkte von Kette und Schuss zuverlässig vor Anhaftungen.

Weder Fasern noch Binder setzen sich in den Glasfaserlitzen oder zwischen den Drähten ab. Einen zentralen Beitrag zur Optimierung von Prozess- und Produktqualität leistet die hohe Querstabilität dieses Bandtyps: Auch bei großen Arbeitsbreiten oder starken Schrumpfkräften des Produktes überzeugt die einlagige Konstruktion durch exzellente Laufeigenschaften. Im Oberband gewährleisten über 0,8 Millimeter dicke, magnetische Schussdrähte aus Stahl durch die absolute Planlage des Bandes eine exakte Kalibrierung und Kompression. Beim Einsatz als Unterband sichert ein Schussdraht aus Edelstahl analoge Querstabilität. So erhalten auch hochvoluminöse und stark verdichtete Produkte über die gesamte Breite eine konstante Dicke und Dichte mit geringsten Toleranzen.

In der Corona-Krise ist eine Entwicklung des Thüringischen Instituts für Textil- und Kunststoff-Forschung (TITK) derzeit besonders gefragt: die antimikrobiell wirksame Cellulose-Faser mit Silber-Ionen. Die smartpolymer GmbH, ein Unternehmen der TITK-Gruppe, stellt sie auf einer Pilotanlage unter dem Namen Cell Solution bioactive her. Abnehmer sind unter anderem die Hersteller von Atemschutzmasken.

Die natürliche antibakterielle Wirkung von Silber wird seit Jahrhunderten zur Entkeimung genutzt. Durch Anreicherung mit dem Edelmetall – bis zu 6 Prozent Silbergehalt sind einstellbar – kann die Cellulose-Faser aus Rudolstadt gerade in Krankenhäusern oder Hygienebereichen einen wertvollen Beitrag zum Schutz vor unerwünschten Keimen leisten. Nach der Verarbeitung zu einem Vlies lässt sie sich unter anderem als eine Lage in Atemschutzmasken integrieren.

„Die Faser wirkt antibakteriell und fungizid – tötet also Keime und Pilze sehr zuverlässig ab“, erläutert Dr. Frank Wendler, der bei smartpolymer die Forschung und Entwicklung der Cell Solution-Funktionsfasern verantwortet. Hierbei handelt es sich um Lyocell-Fasern*, die mit verschiedensten Zusatzfunktionen ausgestattet werden können. Das Besondere: Die Wirkstoffe werden durch ein patentiertes Verfahren direkt in die Faser eingebracht. „Dadurch erreichen wir einen Depot- und einen so genannten Release-Effekt. Das bedeutet, der Wirkstoff bleibt in der Faser gespeichert und wird kontinuierlich über einen längeren Zeitraum nach außen abgegeben“, betont Wendler.

Bei der Verwendung in Atemschutzmasken kommt der Faser noch ein besonderes Merkmal zugute: Lyocell absorbiert Feuchtigkeit sehr gut. Damit wird ein großer Nachteil von Schutzmasken abgeschwächt: Die Ausatemluft durchfeuchtet das Filtermaterial mit der Zeit und macht es so zu einem idealen Nährboden für das Überleben und die Vermehrung von Keimen. Nicht so mit der Entwicklung aus Rudolstadt. Dank der natürlichen Eigenschaften der Lyocell-Faser kann das Vlies bis zu 50 Prozent seines Materialgewichts an Feuchtigkeit aufnehmen. Und die in der Faser gebundenen Silber-Ionen machen die Bakterien rasch unschädlich. Daher können solche Atemschutzmasken vergleichsweise länger getragen und mehrfach verwendet werden.

Die Nachfrage nach Cell Solution bioactive steigt gerade stark an: smartpolymer konnte die Produktion vom großen Labormaßstab erfolgreich auf den Technikumsmaßstab übertragen. Mit Einführung eines Drei-Schicht-Systems soll das Volumen nun kurzfristig so weit wachsen, dass bis zu 10 Tonnen Textil pro Monat mit der Faser ausgerüstet werden können. An einem weiteren Scale-up wird bereits mit Hochdruck gearbeitet.

Die Faser Cell Solution bioactive ist bei der Prüfgemeinschaft Oeko-Tex gelistet und für den Einsatz in Textilien zugelassen. „Zudem erfüllt sie im Stoffkreislauf alle Anforderungen der Nachhaltigkeit“, ergänzt Wendler. „Die Faser wird besonders umweltverträglich hergestellt und ist biologisch abbaubar.“

a leading Asian large-scale manufacturer of manmade fibers and polymers has invested in a new Oerlikon Nonwoven meltblown system. The recently-signed contract comprises a 2-beam system for manufacturing filtration nonwovens – predominantly for medical products such as face masks – with a nominal capacity of up to 1,200 tons of nonwovens a year. The commercial production launch has been scheduled for the fourth quarter of 2020.

The 2-beam system has an operating width of 1.6 meters and is equipped with the new patented Oerlikon Nonwoven electro-charging unit. The Oerlikon Nonwoven meltblown technology is recognized by the market as being the technically most efficient method for producing highly-separating filter media made from manmade fibers, particularly in conjunction with electrostatic charging and with extremely low-pressure loss. Electro-charging the filter nonwovens allows the manufacture of sophisticated EPA- and HEPA-class filter media as well as media that comply with the requirements of N95-, FFP2- and FFP3-class respiratory masks.

The demand for filtration nonwovens for medical applications has risen tremendously across the globe since the outbreak of the Sars-CoV-2 (coronavirus) epidemic, presenting all manufacturers with huge challenges. A meltblown system will be commissioning at the site of a leading Western European nonwovens producers as early as the second quarter of 2020. This system will be deployed exclusively in the manufacture of nonwovens for respiratory masks.

Due to the current state of emergency with regards to the local supply of face masks, Oerlikon Nonwoven is currently using its own laboratory system to produce electrostatically-charged filter media which are being sent to local small businesses and companies for the manufacture of face masks. 

Less wear and superior fiber quality
Technological changes to Oerlikon Neumag’s Baltic crimper thrust pad contacting device have resulted in considerably reduced friction in the crimper rolls and hence less wear and fewer metal particles contaminating the crimped staple fibers.
Thrust pads close the gap between the crimper rolls on either side. Normally, these thrust pads are continually pressed – under high pressure – against the sides of the crimper rolls. Wear and metal debris on the thrust pads is the result of this constant contact. The metal debris can contaminate the fibers, something that is particularly undesirable in hygiene applications.

New thrust pad contacting device for reduced metal debris and greater durability
With the new system, the thrust pads are pressed against the rolls with less pressure and then fixed into place. This prevents fibers from being caught and the frictional force between the pressure disk thrust pad and the crimper roll is minimized. Pilot applications have demonstrated that metal debris from the pressure disks thrust pads is dramatically reduced, making them durable.

• Bangladeshi supplier offers production capacity to produce face masks and PPE on non-profit basis
•  Reaching out to global agencies to build partnerships to help tackle COVID-19 crisis

A Bangladeshi garment manufacturer is offering the manufacturing capacity for the production of protective face masks and Personal Protective Equipment (PPE) on a non-profit basis to help tackle the COVID-19 global pandemic.
Many hospitals in Europe and USA are already running short of masks and PPE as they creak under the strain of the pandemic.
At present, COVID-19 is most prevalent in Europe, where demand for surgical masks and other protective garments has increased this past two months. However, other countries – including Bangladesh – are several weeks behind Europe but are expected to follow the same pattern in terms of cases and deaths.

Denim Expert Limited Managing Director, Mostafiz Uddin, has reached out to the global community including brands & retailers, governments, embassies, donors, development agencies, global apparel associations and bodies in these unprecedented times.