From the Sector

Cavitec, part of Santex Rimar Group, presents the redesigned Caviscreen at Techtextil Frankfurt. Caviscreen features latest technology for breathable laminates.

Caviscreen was developed as a hotmelt coating and laminating unit for breathable sportswear, rainwear and protective clothing – with and without applying a membrane. The redesigned machine shows a brand-new method to supply adhesive more evenly and precisely. Using PUR adhesive (polyurethane reactive adhesive) goes with additional benefits like strong bonding capabilities and versatility.

Caviscreen’s hotmelt screen printing is a special system for high-end application garments. With this Caviscreen system, a PUR adhesive is transferred onto the substrate through a rotary screen, similar to the well-established textile printing method. The adhesives are fed from the drum melter through a heated hose to the traversing adhesive distribution system inside the rotary screen, just behind the doctor blade.

The adhesive is pressed by the doctor blade through the screen holes and transferred to the substrate. Different dot pattern (mesh or irregularly) and different screen thicknesses allow different coating weight and adhesive coverages.

The traversing adhesive dispenser is used to distribute the adhesive automatically over the set working width that – an additional technical benefit – can be set without any mechanical changes.

Cavitec’s screen coating system achieves high bonding strength while using less adhesive than other coating processes, because of applying the coating on the surface of the substrate and like this, the adhesive has less tendency to penetrate the substrate.

Bonding strength, softness of the fabric and the breathability are defined by the coating weight and the coverage. The rotary screen allows users to regulate and adapt the coverage respectively the coating weight. Cavitec offers a large selection of screens that are essential to fulfil the fabric requirements. A further advantage is the ease and efficiency of switching from one screen to another by simply unlocking the bayonet fitting. The IR-heater cover opens pneumatically and the lightweight screen can be easily removed by hand. Unlike with other methods, there's no need to deal with hot oil or any other heated liquid that requires cooling down.

The Caviscreen technology supports manufacturers by reducing costs with screens priced at a mere fraction, just 10%, of common gravure roller prices.

At the upcoming SaigonTex, taking place from April 10th to 13th in Ho Chi Minh City, the KARL MAYER GROUP will present its innovations.

DThe KARL MAYER exhibition for warp preparation is entirely dedicated to sustainability. With BLUEDYE, an innovative machine is introduced, which ensures more sustainability and lower costs in the process of indigo dyeing. Thanks to innovative technological solutions, the amounts of water and chemicals used are significantly reduced. Additionally, less yarn waste is generated. Another innovation for more sustainability is CASCADE, a steam and condensation system that requires significantly less steam in the drying process of sizing and indigo dyeing plants by using a solution for energy recycling that is protected against imitation.

For the warp knitting sector, the group of companies presents its latest technological developments. Highlights include a digital solution from KM.ON for optimizing production management (DPM), innovations for enhancing performance in the HKS segment, and a double raschel machine that enables unique creative multi-color designs in spacer textiles with more colour and new Jacquard techniques.

"Vietnam is a growing market for textile production, which is gaining importance especially for major international sports brands," says Eddy Ho, Senior Sales Manager at KARL MAYER.
The sales professional expects a large number of visitors, especially from Vietnam, China, Taiwan, and South Korea. SaigonTex is one of the most important textile machinery exhibitions in East Asia, located in close proximity to production centres. Vietnam is, in turn, the second most important market for the KARL MAYER GROUP after China. It benefits from increasing foreign direct investments in textile production from China, Taiwan, and South Korea.

Der Bundesverband Medizintechnologie (BVMed) fordert in seinem Positionspapier zur Europawahl am 9. Juni 2024 einen eigenen Gesundheitsausschuss im Europäischen Parlament, um den gestiegenen Stellenwert der Gesundheitsthemen abzubilden. Unter dem Titel „Medizintechnik-Standort Europa stärken“ ist es für den deutschen Medizintechnik-Verband besonders wichtig, dass Europa Lehren aus der Corona-Pandemie zieht, die Resilienz des Gesundheitssystems stärkt und damit die medizinische Versorgung krisenfest gestaltet. „Wir brauchen als MedTech-Branche vor allem einen einheitlichen regulatorischen Rahmen – ohne zusätzliche oder gar weitergehende Standards in den einzelnen Mitgliedsstaaten“, so BVMed-Geschäftsführer und Vorstandsmitglied Dr. Marc-Pierre Möll.

Um ein widerstandsfähiges Gesundheitssystem zu schaffen, fordert der BVMed attraktive Rahmenbedingungen für lokale Produktion und die Stärkung der Resilienz der Lieferketten. Eine „digitale Bestandsplattform für versorgungskritische Medizinprodukte und Arzneimittel“ könne zudem dazu beitragen, dass kritische Produkte uneingeschränkt zur Verfügung stehen. Sinnvoll sei auch eine „Whitelist für kritische Rohstoffe unter dem Critical Raw Materials Act“. Bei der Erarbeitung von politischen Maßnahmen zur Verbesserung der Effizienz und Integrität von Lieferketten müssen alle relevanten Stakeholder einbezogen werden – „inklusive der Medizintechnikbranche“, heißt es im BVMed-Europapapier.

Beim Thema Nachhaltigkeit spricht sich der MedTech-Verband dafür aus, die Vorgaben des europäischen Green Deals am Wohl der Patient:innen auszurichten. „Neue oder geänderte Regulierungen dürfen niemals die Versorgung von Patient:innen gefährden“, heißt es im Positionspapier. Da Produktänderungen zeit- und ressourcenintensiv sowie in der EU-Medizinprodukte-Verordnung (MDR) streng reguliert seien, benötigen umwelt- und nachhaltigkeitsbezogene Regulierungen, die Auswirkungen auf die Gesundheitsversorgung haben, angemessene Ausnahmeregelungen und Übergangsfristen.

Ein wichtiges Anliegen sind dem BVMed die Verbesserungen der MDR, um einen effizienten regulatorischen Rahmen für Medizinprodukte zu schaffen, der die Patient:innenversorgung gewährleistet. Der BVMed fordert daher unter anderem die Abschaffung der fünfjährigen Re-Zertifizierungs-Pflicht, die Einführung eines Fast-Track-Verfahrens für innovative Produkte, Orphan Devices und Nischenprodukte, die Steigerung der Effizienz, der Transparenz und der Berechenbarkeit des MDR-Systems sowie die Zusammenführung der Verantwortung im System über eine zu schaffende Governance-Struktur. Doppelregulierungen müssten durch die Harmonisierung der Anforderungen in verschiedenen Rechtsakten verhindert werden.

Ein weiterer Schwerpunkt der Positionen des deutschen MedTech-Verbandes ist es, Innovationen voranzutreiben und Digitalisierung zu forcieren. Der Europäische Raum für Gesundheitsdaten (EHDS) lege die Grundlage für den Datenaustausch und die Datennutzung für Unternehmen. Der Artificial Intelligence Act (AI-Act) solle bessere Möglichkeiten für die KI-Entwicklung schaffen, bringe aber auch neue Pflichten für Medizinprodukte mit sich, die effizient mit der bestehenden MDR in Einklang gebracht werden müssten. Der BVMed setzt sich für die Schaffung eines echten Binnenmarkts für digitale Gesundheitslösungen mit europaweiten Zulassungen und einheitlichen Standards für Datensicherheit aus. Der EHDS müsse allen Stakeholdern einen gleichberechtigten mit geringem bürokratischem Aufwand bieten. Außerdem müsste die Interoperabilität von Daten auf der Grundlage von international anerkannten Standards ausgebaut werden – „bei weitgehendem Verzicht auf nationale Besonderheiten bei Datenstandards“.

Schließlich sei es auf europäischer Ebene wichtig, Handel auszubauen, Fachkräfte zu sichern und Exporte zu stärken. Tendenzen der Renationalisierung und des Protektionismus erschwerten Europa die Handelsbeziehungen mit Drittstaaten und sorgen für erhebliche Marktzugangshürden. „Eine offene Handelspolitik ist jedoch für die exportstarke Medizintechnik-Branche ein entscheidender Faktor. Damit die Industrie so stark bleibt, bedarf es zudem der Sicherung des nötigen Fachkräftebedarfes“, heißt es in dem BVMed-Papier.

ACG Kinna Automatic and ACG Nyström – members of TMAS, the Swedish textile machinery association – have delivered the first microfactory for the production of fully finished filter bags to an international filtration industry customer, in cooperation with JUKI Central Europe.

The microfactory’s configuration is based on two separate interconnecting modules – the Smart Filter Line (SFL) and the Filtermaster 2.0. The SFL handles the fabric feeding from rolls and its folding prior to seam construction, which can either be by automatic sewing, welding or with sewing and taping, depending on specifications. Very rapid changeover of the modular seaming methods can be achieved during product changes. The specific size of the now fully-tubular fabric is then precisely cut to size for each individual unit and further folded ready to be fed into the Filtermaster 2.0. The Filtermaster 2.0 then automatically attaches the reinforcement, bottom and snap rings onto the filter tube with a second Juki sewing head on a robotic arm, to form the fully finished filter bag ready for packaging.

Filter bags are employed in a wide range of industrial processes and while they may be largely under the radar as products, they represent a pretty significant percentage of overall technical textiles production.
They are used in foundries, smelters, incinerators, asphalt plants and energy production plants. Other key manufacturing fields – often where dust is generated – include the production of timber, textiles, composites, waste handling and minerals, in addition to chemicals, food production, pharmaceuticals, electronics and agriculture.

As a further example of the scale of the industry and the high volumes of fabrics involved, one supplier has delivered a single order of 30,000 filter bags to be used for flue gas cleaning at a European power plant. The bags can also be anywhere up to twelve metres in length and frequently have to be replaced.

STFI will be presenting high-end textile products and solutions at Techtextil 2024. The highlights from current research results and innovations provide an insight into the digitalisation of textile production, show applications for 3D printing and smart technical textiles and provide examples of particularly sustainably designed products as well as innovative approaches for protective and medical textiles.

The central highlight of STFI's presence at Techtextil is a robot system that demonstrates the automated processing of a bobbin frame on a small scale. The pick-and-place application demonstrates camera-supported gripping of the bobbins. The robot is part of the STFI's “Textile Factory of the Future” which demonstrates automation solutions for the textile industry in a laboratory environment.

From the field of sustainable products and solutions, a sleeping bag with bio-based and therefore vegan filling material and a natural fibre-based composite element for furniture construction, in which LEDs and capacitive proximity sensors for contactless function control have been applied using embroidery technology, will be on show. Printed heating conductor structures demonstrate current research work for the e-mobility of the future, as the individually controllable seat and interior heating should ultimately reduce weight and save energy compared to conventional heating systems.

While a protective suit for special task forces protects against the dangers of a Molotov cocktail attack, a shin guard and a knee brace with patellar ring illustrate the process combination of 3D printing and UV LED cross-linking. Other highlights from lightweight textile construction include the rib of a vertical rudder of an Airbus A320 and a green snowboard made from recycled carbon fibres.

Lightweight design is a key enabler for addressing the energy transition and sustainable economy. Following the liquidation of the state agency Leichtbau BW GmbH, a consortium consisting of the Allianz Faserbasierter Werkstoffe Baden-Württtemberg (AFBW), the Leichtbauzentrum Baden-Württemberg (LBZ e.V. -BW) and Composites United Baden-Württemberg (CU BW) now represents the interests of the lightweight construction community in the State.

The Lightweight Design Agency for Baden-Württemberg is set up for this purpose on behalf of and with the support of the State. The Lightweight Construction Alliance BW is the central point of contact for all players in the field of lightweight construction in the State and acts in their interests at national and international level. Professor Markus Milwich from the German Institutes of Textile and Fiber Research Denkendorf (DITF) represents the agency.

The use of lightweight materials in combination with new production technologies will significantly reduce energy consumption in transportation, the manufacturing industry and the construction sector. Resources can be saved through the use of new materials. As a cross-functional technology, lightweight construction covers entire value chain from production and use to recycling and reuse.

The aim of the state government is to establish Baden-Württemberg as a leading provider of innovative lightweight construction technologies in order to strengthen the local economy and secure high-quality jobs.

Among others, the "Lightweight Construction Alliance Baden-Württemberg" will continue the nationally renowned "Lightweight Construction Day", which acts as an important source of inspiration for a wide range of lightweight construction topics among business and scientific community.

Professor Milwich, an expert with many years of experience and an excellent network beyond the State's borders, has been recruited for this task. In his role, Milwich also represents the state of Baden-Württemberg on the Strategy Advisory Board of the Lightweight Construction Initiative of the Federal Ministry for Economic Affairs and Climate Action, which supports the cross functional-technology and efficient transfer of knowledge between the various nationwide players in lightweight construction and serves as a central point of contact for entrepreneurs nationwide for all relevant questions.

From 2005 to 2020, Professor Milwich headed the Composite Technology research at the DITF, which was integrated into the Competence Center Polymers and Fiber Composites in 2020. He is also an honorary professor at Reutlingen University, where he teaches hybrid materials and composites. "Lightweight design is an essential aspect for sustainability, environmental and resource conservation. I always showcase this in research and teaching and now also as a representative of the lightweight construction community in Baden-Württemberg," emphasizes Professor Milwich.

Freudenberg Performance Materials (Freudenberg) is showcasing solutions for the automotive, building, apparel, filtration and packaging industries at this year’s Techtextil in Frankfurt am Main from April 23 – 26.

Sustainable nonwoven for car seats
One innovation highlight at Techtextil is a novel Polyester nonwoven material for car seat padding. Also available as a nonwoven composite with PU foam, it is not only easier for car seat manufacturers to handle during the mounting process, but also ensures better dimensional stability as well as providing soft and flexible padding. It has a minimum 25 percent recycled content, for example, by reusing nonwoven clippings and waste, and is fully recyclable. Full supply chain transparency enables customers to trace and verify the content of the nonwoven and thus ensures a responsible production process. The Freudenberg experts will also be presenting several other nonwoven solutions made of up to 80 percent recycled materials that can be used in car seat manufacturing.

Biocarrier for green roofs
Freudenberg is showcasing a sustainable carrier material for green roofs on urban buildings at the trade fair. The carrier is made from polylactide, i.e. from renewable resources. When filled with soil, it provides a strong foothold to root systems, enabling the growth of lightweight sedum blankets that can be rolled out to provide instant green roofs. These roofs not only help counter urban heat, they also improve stormwater management and regulate indoor temperatures.

From textile waste to padding
The company extended its circular thermal wadding product range with the release of comfortemp® HO 80xR circular, a wadding made from 70 percent recycled polyamide from discarded fishing nets, carpet flooring and industrial plastic. Because polyamide 6, also known as nylon, retains its performance characteristics after multiple recycling processes, the fibers can be used again and again to manufacture performance sporting apparel, leisurewear and luxury garments.

Packaging solutions with various sustainability benefits
Freudenberg is also showcasing products for sustainable packaging and filtration solutions. The long-lasting Evolon® technical packaging series is a substitute for disposable packaging used in the transport of sensitive industrial items such as automotive parts. The material is made from up to 85 percent recycled PET. A further highlight at Techtextil are Freudenberg’s fully bio-based solutions for manufacturing dessicant bags. The binder-free material based on bio-fibers is also industrially compostable.
In addition, the experts will be giving trade fair visitors an insight into Freudenberg’s filtration portfolio.

Baldwin Technology Co. will join Elmatex GmbH at Techtexil (April 23-26 in Frankfurt, Germany) to demonstrate its TexCoat™ G4 precision spray finishing system.

With Baldwin’s system, the chemistry is precisely distributed across the textile surface and is applied only where it is required, on one or both sides of the fabric. The non-contact technology eliminates chemistry dilution in wet-on-wet processes, allowing full control of maintaining consistent chemistry coverage rates. Plus, pad bath contamination is eliminated, and changeovers are only required when there is a change of finish chemistry.
 
Furthermore, the system offers automated speed tracking, fabric-width compensation, and real-time monitoring to track system uptime, performance and chemistry usage, as well as active care alerts.
 
In addition, the TexCoat™ G4 system can process a wide range of low-viscosity water-based chemicals, such as durable water repellents, softeners, antimicrobials, flame retardants and more. Baldwin’s technology utilizes the same chemicals used in the traditional pad bath, and no special auxiliaries are required. The recipe is adjusted by increasing the concentration and reducing the pickup by a corresponding amount, so that the same level of solids is applied.
 
Some applications, such as durable water repellents, are only applied on the face of the fabric, instead of the traditional method of saturation through dipping and squeezing. Drier fabric entering the stenter means lower drying temperatures and faster process speeds. Single-side applications also open up the opportunity to process back-coated or laminated fabrics in a single pass of the stenter, instead of two passes.

Eine Chance für Young Professionals und angehende Fachkräfte, sich mit innovativen Unternehmen entlang der gesamten textilen Wertschöpfungskette zu vernetzen, bieten die Techtextil und Texprocess. Die international führenden Innovationsmessen, die vom 23. bis 26. April 2024 in Frankfurt am Main parallel zueinander stattfinden, halten für Studierende und Berufsanfänger*innen zahlreiche Vernetzungsmöglichkeiten und Wissensformate bereit.

Die Techtextil gibt einen gebündelten Überblick über die globale Innovationskraft technischer Textilien und Vliesstoffe und macht deren vielfältige Anwendungsbereiche sichtbar - von Automobil bis Bau, Fashion und Medizin. Gleichzeitig agiert die Texprocess als internationale Plattform neuester Maschinen, Verfahren und Dienstleistungen für die Konfektion von Bekleidung und textilen Materialien und präsentiert Lösungen von Nähtechnik bis hin zu Cutting-Technologien.

Für Young Professionals bedeutet dies zahlreiche Vernetzungsmöglichkeiten. Techtextil und Texprocess halten eine Vielzahl an Wissens- und Networking-Formaten bereit – darunter zahlreiche Präsentationen von Universitäten, Forschungsinstituten und Start-ups, die gezielt Berufseinsteiger*innen und interessierte Fachkräfte ansprechen. Darüber hinaus stehen am Messefreitag die Vortragsformate Techtextil Forum und Texprocess Forum im Zeichen der nächsten Generation.

„Nachwuchsförderung nimmt einen starken Fokus auf der Techtextil und Texprocess ein. Wir arbeiten sehr eng mit Hochschulen, Forschungseinrichtungen und Newcomern der Branche zusammen. Die aktuelle Dringlichkeit der Textilbranche, neue Fachkräfte zu gewinnen, verleiht unserem Ansatz noch mal mehr Relevanz“, sagt Sabine Scharrer, Director Brand Management Technical Textiles & Textile Processing. „Als Teil des Konzeptes werden ausgewählte Hochschulen zu den Veranstaltungen eingeladen. Schon jetzt haben viele renommierte Institute zugesagt, die Messen mit Studierenden entsprechender Fachrichtungen zu besuchen und die Innovationskraft der Branche gebündelt live zu erleben“, berichtet Sabine Scharrer.

Campus & Research: neueste Erkenntnisse der Wissenschaft
Auf den Arealen Campus & Research in den Hallen 12.1 sowie 8.0 präsentieren internationale Hochschulen, Institute und Forschungseinrichtungen sowohl ihre Forschungskompetenz als auch ihr vielfältiges Angebot an Studien- und Weiterbildungsmöglichkeiten. Die Schwerpunkte liegen auf Textil und Technologien zur Herstellung und zur Be- und Verarbeitung von Textilien.
 
Techtextil und Texprocess finden vom 23. bis 26. April 2024 auf dem Frankfurter Messegelände statt.

Textiles for technical applications often derive their special function via the application of coatings. This way, textiles become, for example wind and water proof or more resistant to abrasion. Usually, petroleum-based substances such as polyacrylates or polyurethanes are used. However, these consume exhaustible resources and the materials can end up in the environment if handled improperly. Therefore, the German Institutes of Textile and Fiber Research Denkendorf (DITF) are researching materials from renewable sources that are recyclable and do not pollute the environment after use. Polymers that can be produced from bacteria are here of particular interest.

These biopolymers have the advantage that they can be produced in anything from small laboratory reactors to large production plants. The most promising biopolymers include polysaccharides, polyamides from amino acids and polyesters such as polylactic acid or polyhydroxyalkanoates (PHAs), all of which are derived from renewable raw materials. PHAs is an umbrella term for a group of biotechnologically produced polyesters. The main difference between these polyesters is the number of carbon atoms in the repeat unit. To date, they have mainly been investigated for medical applications. As PHAs products are increasingly available on the market, coatings made from PHAs may also be increasingly used in technical applications in the future.

The bacteria from which the PHAs are obtained grow with the help of carbohydrates, fats and an increased CO₂ concentration and light with suitable wavelength.

The properties of PHA can be adapted by varying the structure of the repeat unit. This makes polyhydroxyalkanoates a particularly interesting class of compounds for technical textile coatings, which has hardly been investigated to date. Due to their water-repellent properties, which stem from their molecular structure, and their stable structure, polyhydroxyalkanoates have great potential for the production of water-repellent, mechanically resilient textiles, such as those in demand in the automotive sector and for outdoor clothing.

The DITF have already carried out successful research work in this area. Coatings on cotton yarns and fabrics made of cotton, polyamide and polyester showed smooth and quite good adhesion. The PHA types for the coating were both procured on the open market and produced by the research partner Fraunhofer IGB. It was shown that the molten polymer can be applied to cotton yarns by extrusion through a coating nozzle. The molten polymer was successfully coated onto fabric using a doctor blade. The length of the molecular side chain of the PHA plays an important role in the properties of the coated textile. Although PHAs with medium-length side chains are better suited to achieving low stiffness and a good textile handle, their wash resistance is low. PHAs with short side chains are suitable for achieving high wash and abrasion resistance, but the textile handle is somewhat stiffer.

The team is currently investigating how the properties of PHAs can be changed in order to achieve the desired resistance and textile properties in equal measure. There are also plans to formulate aqueous formulations for yarn and textile finishing. This will allow much thinner coatings to be applied to textiles than is possible with molten PHAs.

Other DITF research teams are investigating whether PHAs are also suitable for the production of fibers and nonwovens.