From the Sector

Das 16. Symposium TEXTILE FILTER des Sächsischen Textilforschungsinstituts e.V. (STFI) fand am 14. und 15. März 2023 im Hotel Chemnitzer Hof, Chemnitz, statt. Mussten vor drei Jahren wegen coronabedingter Reisebeschränkungen noch einige Vorträge über Videokonferenz gehalten werden, konnten in diesem Jahr knapp 100 Teilnehmer in Präsenz vor Ort sein. Im Rahmen des Symposiums wurden insgesamt 18 Vorträge und vier Pitch-Vorträge gehalten. Parallel wurde das Symposium von einer Fachausstellung begleitet, in der zehn Aussteller ihre Produkte und Services zeigten.

Der erste Vortragskomplex widmete sich den Themen Nachhaltigkeit, Kreislaufwirtschaft und Life Cycle Analysis (LCA). Herausgestellt wurde dabei, dass zum Vergleich der Prozesse, Materialien und Produkte die nationale und internationale Normung und Standardisierung sowie für die wirtschaftliche Durchführung die Automatisierung der LCA grundlegende Voraussetzungen sind. Außerdem wurde klargestellt, dass ein ehrlicher Vergleich der existierenden Vor- und Nachteile der biobasierten gegenüber den erdölbasierten Rohstoffen erforderlich ist.

Während der Coronakrise kam es auch in der Textilindustrie zu einem Zusammenbruch der Lieferketten. Die Lieferketten erholen sich, dafür wird die Wirtschaft gegenwärtig durch eine Energiekrise gebeutelt. Alternative Energiequellen wie Wasserstoff sind leider noch nicht ausgereift und stehen für eine umfassende Nutzung nicht bereit. Ansätze, um Energie einzusparen, sind Minimalauftragsverfahren in der Ausrüstung, die Wärmerückgewinnung, das Recycling oder die Einsparung von Verpackungen für den Transport.

Ein weiter Themenkomplex des Symposiums widmete sich der Normung und Standardisierung der Filterprüfungen. Zu erwähnen sind hier die Prüfung von Luftfiltern in Kombination mit Brandschutz für Züge, die Prüfung von Luftfiltern für Haushalt, öffentliche Räume und Industrieanlagen oder die Entwicklung von Labortestverfahren zur beschleunigten Alterungsprüfung von mobilen Entstaubungsanlagen.

Mehrere Vorträge hatten die Modellierung und Simulation von Prozessen der Vliesstoffherstellung (z. B. die virtuelle Produktion, Beeinflussung der Wolkigkeit von Extrusionsvliesstoffen oder die Verteilung von Spinnfasern und -filamenten), den Aufbau und die Charakteristik von Filtervliesstoffen (z. B. Flächenstruktur, Druckverlustkurve, Partikeltransport und -adsorption) sowie die Aerosolverteilung bzw. die Filtereffektivität in Abhängigkeit der Platzierung der Luftfilter im Raum zum Inhalt.

Auf dem Symposium wurden zudem auch verschiedene neue Materialien und Produkte vorgestellt. Dabei sind besonders hervorzuheben:

• Flüssigkeitsgefüllte Hohlfasern für die Abwasserreinigung
• Neue Spezialpapiere für Luftwärmeüberträger, bei dem ein kräuselfähiges Mikro-/Nanofasermu-
• ltifilamentgarn mit Einzelfaserdurchmessern von < 1,0 μm Fasern nach dem Island-in-the-Sea Schmelzspinnverfahren hergestellt werden
• 3D-Absorbervliesstoffe mit integrierter Gassensorik (PAKs) für die Schutzbekleidung von Einsatzkräften im Bereich Feuerwehr
• Getuftete Filterstrukturen kombiniert mit leitfähigen Interdigitalstrukturen für die Luftfiltration
• Kompakte Luftfilterelemente und deren Optimierung
• Einsatz von Ionisatoren für die Aerosolabscheidung im Filter

Abschließend stellte das STFI in eigener Sache geplante bzw. bereits realisierte Investitionen vor, die die technisch/technologische Basis und die Prüfkompetenz des Institutes erweitern. In Kurzvorträgen wurde die Errichtung einer Nassvliesanlage mit 600 mm Arbeitsbreite vorgestellt, die besonders für den Filterbereich und das Forschungsfeld Textilrecycling neue Entwicklungen ermöglichen wird. Für den Bereich Nähwirktechnik wurde eine neue Maliwatt- Maschine mit optimierter Arbeitsstelle investiert. Die Errichtung eines Prüfstandes für FFP2-Masken, der auch für die Prüfung von Filtern eingesetzt werden kann, erweitert die Prüfkompetenz des Hauses erheblich. Sein variabler Aufbau ermöglicht auch die Prüfung von neuentwickelten Vliesstoffen, deren Konstruktion durch Simulation optimiert wurde.

India’s leading trade fair in technical textiles, nonwovens and composites, Techtextil India, is ready to make a comeback through its hybrid edition launch from 25 – 27 November 2021. With a series of live product demonstrations, insightful knowledge sessions and B2B networking opportunities, the multimodal trade fair will provide a strong avenue for technical textile professionals to reimagine their business potential.
 
After a successful grand edition in 2019, Techtexil India is all set to return for the very first time since the pandemic. The three-day exhibition will be hosted in a hybrid format from 25 – 27 November 2021, Bombay Exhibition Centre, Goregaon which will unite technical textile players from across its varied application areas. Top technical textile brands including JB Ecotex, PARK Nonwoven, Loyal Textiles Lenzing, Mehala, Meera Industries, amongst many others will showcase their latest products at the hybrid fair. Moreover, leading German brands exhibiting at Techtextil India 2021 will be hosted under the German pavilion.

The conjunction between the physical exhibition and the online business matchmaking platform will make way to a wider range of networking. Local and international visitors who are unable to attend the venue will be able to witness the exhibition virtually through the ‘MFI virtual app’ which will host live knowledge sessions and product demonstrations for visitors. The two-day multimodal trade fair allows the visitors to search for specific products like fibers, yarns, nonwovens, machinery, coated textiles with easy-to-use filters further to which they can share their query or connect directly with the respective exhibitors.

At the same time, visitors attending the venue will be welcomed under a well-organised physical exhibition following the government-authorised safety protocols of ‘MFI SafeConnect’. These protocols will enable visitors to engage in secure face-to-face interactions with exhibitors and witness the latest technical textile technologies and innovations in-person.

Alliance with the Government of Tamil Nadu
In a bid to strengthen indigenous production through the state and attract investors, the nodal agency for investment promotion and facilitation for the Government of Tamil Nadu – Guidance has signed up for Techtextil India 2021. Furthermore, technical textile players from Tamil Nadu such as Cyber Textiles India Pvt Ltd, Jayashree Spun Bond, Lenzing Ag India, Liester Technologies, Loyal Textile Mills Ltd, Milltex Engineers Pvt Ltd, Superfil Products Pvt Ltd, Uster Technologies (India) Pvt Ltd have also confirmed their participation for the exhibition.
Announcing a close co-operation with Messe Frankfurt India for the 2021 edition, Ms Pooja Kulkarni, IAS MD & CEO, Guidance Tamil Nadu, stated: “While there are several inherent advantages for the growth of technical textiles in Tamil Nadu specifically, many raw materials used in the production of sanitary products, artificial ligaments, seat belt webbings, airbags are still heavily imported. In this context, the alliance with Techtextil India Forum can help us reduce import dependency and bring investments in R&D, manufacturing, innovation by partnering with global technical textiles companies.”

With 50% of India’s textile mills in Tamil Nadu and complementary clusters of knitting, weaving and medical devices manufacturing in Coimbatore, and Tiruppur, the region provides immense opportunities for Meditech investments. Two petrochemical and refinery units – One in Cuddalore and another in Nagapattinam by CPCL is in the process of being established in Tamil Nadu. These units will enable availability of MMF raw material for the textile industry across the state. Hence, manufacturing in Tamil Nadu can be a win-win arrangement for investors as India provides access to the burgeoning market as well.

International expertise with German pavilion
Techtexil India 2021 edition will feature an exclusive German Pavilion showcasing products and technologies from top German manufacturers, including Autefa Solution Germany GmbH, DILO Systems GmbH, Emtec Electronic GmbH, Georg Sahm GmbH & Co, Karl Mayer Verwaltungsgesellschaft mbH, Merz Maschinenfabrik GmbH and Oerlikon Barmag Zweigniederlassung der Oerlikon Textile GmbH & Co.

Baldwin Technology’s Ahlbrandt, a leader in providing corona, rotor spray and drying technology for industries including food packaging, textiles and more, has launched the highly efficient Ozone Converter Catalytic Air Purifier (CAP), which cleans exhaust air from corona surface treatment systems. With a catalyst bed of metal oxides, the CAP ensures an ozone-free, environmentally friendly production facility.

Featuring a compact, durable design, the CAP also is modular for easy maintenance and expansion, if needed. As requirements and production conditions change, the catalyst volume is adapted to the exhaust volume of the installed corona surface treatment system. Additionally, the catalyst filter is designed without active carbon, making it nonflammable and very safe, especially when running in high temperatures.

“The new Ozone Converter CAP for corona surface treatment systems is designed to be both very efficient and environmentally conscious, supporting human health and safety,” said Holger Bätz, Production Manager for Ahlbrandt. “These are important values, reflected in all of Ahlbrandt’s technologies and throughout our organization.”

Since the outbreak of the coronavirus pandemic, the worldwide demand for protective masks and apparel has resulted in a record number of new orders in the high double-digit millions of euros at Oerlikon Nonwoven. The meltblown technology from Neumünster is recognized by the market as being one of the technically most efficient methods for producing highly-separating filter media made from plastic fibers.

Protective equipment demands high-end nonwoven products
The rising demand for protective masks and other medical protective equipment since the start of the coronavirus pandemic and the associated global ramping up of production capacities has also resulted in an increase in the demand for nonwovens for the production thereof. Initially, this resulted in bottlenecks in the provision of meltblown filter nonwovens. To this end, there had until this point be very few producers of medical filter nonwovens outside China. Meanwhile, the demand for spunbond systems is also rising. “Due to the structure of our group, we are in the fortunate position to swiftly reallocate and free up our production capacities. This means that we are able to relatively quickly deliver not only meltblown systems, but also spunbond equipment”, explains Dr. Ingo Mählmann, Head of Sales & Marketing at Oerlikon Nonwoven, talking about the positive situation at the company.

The capacities for respiratory masks available in Europe to date are predominantly manufactured on Oerlikon Nonwoven systems. “Our machines and systems for manufacturing manmade fiber and nonwovens solutions enjoy an outstanding reputation throughout the world. Ever more manufacturers in the most diverse countries are hoping to become independent of imports”, comments Dr. Mählmann. The Oerlikon Nonwoven meltblown systems are being delivered to Germany, China, Turkey, United Kingdom, South Korea, Italy, France, North America and – for the very first time – to Australia until well into 2021.

Quality and efficiency in demand
Depending on the purpose of the application, medical PPE (personal protection equipment) should be breathable and comfortable to wear, protect medical staff against viruses, bacteria and other harmful substances and form a barrier against liquids. For these reasons, they are often made of either pure spunbond or of spunbond-meltblown combinations. Here, the meltblown nonwoven core assumes the barrier or filter task, while the spunbond has to retain its shape, while being tear-resistant, abrasion-proof, absorbent, particularly flame-resistant and nevertheless extremely soft on the skin.

All masks are not created equal – thanks to the ecuTEC+
Protection against infections such as coronavirus can only be guaranteed with the right quality.

The nonwovens can be electrostatically-charged in order to further improve the filter performance without additionally increasing breathing resistance. Here, Oerlikon Nonwovenʼs patented ecuTEC+ electro-charging unit excels in terms of its extreme flexibility. Nonwovens manufacturers can freely choose between numerous variation options and set the optimal charging method and intensity for their specific applications. In this way, even the smallest particles are still attracted and reliable separated by a relatively open-pored nonwoven. Nevertheless, mask wearers are still able to easily breathe in and out due to the comparatively loose formation of the fibers. To this end, it comes as no surprise that all meltblown systems currently destined for the production of mask nonwovens are equipped with the ecuTEC+ unit.

With immediate effect, the first fabric mask with the official “TESTEX Community Mask” test label is available from the two Swiss textile firms, Schoeller Textil AG and Forster Rohner AG. Since May, the companies have been able to offer their masks with official EMPA recommendation. The sustainable and economical quality products consist primarily of recycled performance fabric which can be recycled once again at the end of its service life.

Swiss cooperation
With the product from the two companies based in the east of Switzerland, Schoeller Textil AG and Forster Rohner AG, the Swiss market now boasts the first textile mask featuring the label “TESTEX Community Mask”. Together with the EMPA, TESTEX has developed a testing procedure which analyses textile masks with regard to their filter function, spray resistance, comfort of wear, reusability and additionally skin-friendliness of the textiles. By now, numerous Swiss and international consumers, as well as the employees of major companies (e.g. transport companies) have satisfied themselves of the suitability of the Swiss Community Masks for everyday use.

Recyclable fabric made with 60 % recycled fibres
The high-quality fabric components in the mask were developed by the innovative Rheintal-based company Schoeller Textil AG. The two-layer polyester fabric is hydrophilic (having an affinity to water) on the outside and hydrophobic (water-repelling) on the outside and furthermore features an antibacterial finish. Thanks to the cotton-like feel, the fabric offers pleasant wearing comfort. The sustainable fabric consists of 60 % recycled fibres. Within the framework of the wear2wear recycling cooperation (www.wear2wear.org), the masks can be recycled once again when they reach the end of their life cycle.

The reusable mask is made up by Forster Rohner AG in St. Gallen and in its European subsidiaries. It impresses with optimum fit and tested skin tolerance. All components of
the mask comply with the OEKO-TEX® Standard 100. The testing process screens for numerous controlled and non-controlled substances. Masks with the OEKO-TEX® Standard 100 label are safe to wear. Forster Rohner also added a fashion component to the technicallyinnovative mask. The subsidiary, Jakob Schlaepfer AG, created a special print for the mask of the kind otherwise only developed for famous couture and prêt-à-porter fashion labels around the world. In addition to white and plain-coloured masks, a limited edition of available print designs emerges, or specific colours or even individual print designs are created for major customers.

HeiQ, winner of the Swiss Technology Award and Swiss Environmental Award, launches HeiQ Viroblock NPJ03, an antiviral and antimicrobial textile treatment that is tested effective against coronavirus.

Since its inception 15 years ago, HeiQ has forged a solid innovation track record helping brands improve textile products. Catalyzed to action by the global fight against Coronavirus, HeiQ launches HeiQ Viroblock NPJ03, an antiviral and antimicrobial textile treatment which is proven effective against human coronavirus (229E) in face mask testing, significantly enhancing the antiviral log reduction from 2.90 of untreated face masks to 4.48, over 99.99% reduction of virus infectivity. (Remarks: a log reduction of 2 is equivalent to 100 times the effectiveness).

Chinese protective masks producer Suzhou Bolisi is the lead adopter of HeiQ Viroblock NPJ03. Treated masks will be available on the market as early as this April. American legwear manufacturer Kayser-Roth is planning to add the technology to their new product, Ghluv hands protector, while Lufeng from China is evaluating the technology on other types of fabric used for garments.

HeiQ Viroblock NPJ03 is a unique combination of vesicle and silver technologies designed to inhibit the growth and persistence of bacteria and viruses. The HeiQ vesicle technology targets lipid- enveloped viruses, such as coronavirus, providing rapid virus deactivation, while the HeiQ silver technology inhibits the replication of both bacteria and viruses. HeiQ Viroblock NPJ03 can be applied to a wide spectrum of textile surfaces including face masks, air filters, medical gowns, curtains, drapes and more. HeiQ also has a range of highly wash-durable antimicrobial and odor control textile technologies, called HeiQ Pure, combining silver-based and bio-based materials for all fabric types.