From the Sector

Cobra International, Chonburi, Thailand: COBRA International, one of the world’s largest OEM manufacturers of composite goods for Water Sports, Automotive, Marine and Civil Engineering, is pleased to confirm the shipment of its first 36 composite canoes to ARE Tahiti.

COBRA has collaborated with leading outrigger canoe brand ARE Tahiti to mass produce its new OC-1 canoe, ‘Mana’. Designed by former professional windsurfer Baptiste Gossein  (JP Australia and Neil Pryde), ‘Mana’ features a closed deck on which the paddler sits on top of the hull. Available in two models; a hybrid version weighing 12kg, using an 80:20 mix of E-glass and carbon fibre reinforcement fabrics, and the PRO model – a weight optimized, ultra-light, full carbon version that weighs as little as 9kg.   

“We required the best in composite construction for both models, a stunning final finish and a build rate that could keep up with our growing order book”, comments Baptiste Gossein.

As with all of COBRA’s watersports’ projects, a perfect master model formed the basis of the mass production tooling and two sets of composite hull tooling were taken from the master plug allowing a build rate of up to 50 OC-1 canoes per month.

For the lay-up and construction process, COBRA’s high-performance PVC foam sandwich windsurf board construction provided a solid starting point.  Having selected vacuum consolidated epoxy wet layup for the mix of woven and stitched biaxial reinforcements, COBRA was able to build down to the customer’s weight target with the absolute minimum of waste and additional consumables.  Top and bottom sections of the hull were moulded separately then bonded together, with the smaller outrigger hull – known as the ‘ama’ – produced in the same way.  Prepreg carbon fibre and in-house split mould tooling was also used for the two ‘Iakos’ - the two cross beams that join the ama to the main hull. 

An in-mould applied finish coat was then used for the hybrid OC-1 while the PRO carbon fibre model benefits from COBRA’s ultra-light paint system.

“COBRA is able to provide mass production capability and rapid new model turnaround, as well as delivering consistently high quality. We are delighted with the first COBRA built OC-1s and have received exceptionally positive feedback from both customers and racers” comments Baptiste Gossein.

The next ARE project to enter mass production at COBRA will be the V-1 canoe. Similar to the OC-1 but an open boat that the paddler sits inside, the V-1 will have no rudder or steering system, requiring more finesse to manage underway.

“The OC-1 outrigger canoe is a superb example of our customer focused approach to production process development.  By working closely with Baptiste and the ARE team, COBRA is able to provide mass production capability and a rapid new model turnaround, as well as delivering consistently high quality.  This is a sector in which we expect to see significant expansion over the next few years”, comments Danu Chotikapanich, CEO, COBRA International.

At first glance, rowing boats, the Airbus 380, safety equipment and stadium roofing have very little on common. They receive their specific properties as a result of the use of special fibers, among other things: aramid fibers and carbon fibers are processed into special yarns that are frequently deployed as compound materials. These fibers are growing in demand as the world seeks to reduce its reliance on fossil fuels; new solutions are required to reduce weight and replace heavy metallic parts.

Aramid fibers are produced in a highly-chemical process that is extremely aggressive; the acrylic precursor used to manufacture carbon fibers is a different process, but again no less difficult. In these sophisticated processes, the gear metering pumps are not only responsible for the high-precision control of the melt transport; durability, resistance within aggressive environments and cost efficiency also play decisive roles.

Special materials for special tasks
The process, the expected pump lifespan and the maintenance frequency are the decisive factors for choosing the materials from which the pumps and their components are manufactured. For optimum results, Oerlikon Barmag offers solutions that intelligently combine the various materials and the latest technologies. Whether in the case of surfaces with ceramic coatings, gears and shafts featuring DLC coatings, pumps made from cobalt alloys (StelliteTM) or robust and durable Oerlikon Barmag hybrid constructions comprising zirconium oxide ceramic and duplex stainless steel – the high-precision ZP- and GM-series pumps are design-optimized depending on the intended use. Various seal systems and customized drive concepts round off the pump program.

Archroma, a global leader in specialty chemicals towards sustainable solutions, today announced an increase of up to 20% in the selling prices of its Nuva^® N and Fluowet^® fluorocarbon polymers.

Fluorocarbon polymers are typically used in essential applications where a water and/or oil barrier is needed, such as personal protective equipment (PPE) for health professionals, or other technical textiles.

As a global leader in the area of repellency treatments, we have the responsibility to develop and produce products with the highest level of sustainability – economically and ecologically.

The price increase has become necessary to support the increasing regulatory and other costs, as well as ongoing investments that Archroma continuously makes in its own manufacturing technology and process, to produce fluorochemicals in the safest possible way for the consumer and the environment.

The price increase will be effective from November 16, 2020, in all regions and markets, for all new orders and as contracts allow.

® Trademarks of Archroma registered in many countries

• Kohlenstoff mit mehreren Leben

Geht es um die Zukunft der motorisierten Mobilität, reden alle vom Antrieb: Wie viel E-Auto, wie viel Verbrenner verträgt die Umwelt und braucht der Mensch? Zugleich stellen neue Antriebe erhöhte Anforderungen nicht nur an den Motor, sondern auch an dessen Gehäuse und die Karosse: Für solch anspruchsvolle Anwendungen kommen häufig Carbonfasern zum Einsatz. Wie der Antrieb der Zukunft, sollten auch die Werkstoffe am Fahrzeug umweltfreundlich sein. Deshalb ist Recycling von Carbonfasern gefragt. Lösungen dafür haben Institute der Zuse-Gemeinschaft entwickelt.

Carbonfasern, auch als Kohlenstofffasern oder verkürzt als Kohlefasern bekannt, bestehen fast vollständig aus reinem Kohlenstoff. Sehr energieaufwändig wird er bei 1.300 Grad Celsius aus dem Kunststoff Polyacrylnitril gewonnen. Die Vorteile der Carbonfasern: Sie haben kaum Eigengewicht, sind enorm bruchfest und stabil. Solche Eigenschaften benötigt man z.B. am Batteriekasten von E-Mobilen oder in Strukturbauteilen der Karosserie. So arbeitet das Sächsische Textilforschungsinstitut e.V. (STFI) aktuell gemeinsam mit Industriepartnern daran, statisch-mechanische Stärken der Carbonfasern mit Eigenschaften zur Schwingungsdämpfung zu verknüpfen, um die Gehäuse von E-Motoren im Auto zu verbessern. Angedacht ist in dem vom Bundeswirtschaftsministerium geförderten Projekt die Entwicklung sogenannter Hybridvliesstoffe, die neben der Carbonfaser als Verstärkung weitere Faserstoffe enthalten. „Wir wollen, die Vorteile unterschiedlicher Faserstoffe verbinden und so ein optimal auf die Anforderungen abgestimmtes Produkt entwickeln“, erläutert Marcel Hofmann, STFI-Abteilungsleiter Textiler Leichtbau.

Damit würden die Chemnitzer Forschenden bisherige Vliesstoff-Lösungen ergänzen. Sie blicken auf eine 15-jährige Geschichte in der Arbeit mit recycelten Carbonfasern zurück. Der globale Jahresbedarf der hochwertigen Fasern hat sich im vergangenen Jahrzehnt fast vervierfacht, laut Angaben der Industrievereinigung AVK auf zuletzt rd. 142.000 t. „Die steigende Nachfrage hat das Recycling immer stärker in den Fokus gerückt“, betont Hofmann. Carbonfaserabfälle sind ihm zufolge für etwa ein Zehntel bis ein Fünftel des Preises von Primärfasern erhältlich, müssen aber noch aufbereitet werden. Dreh- und Angelpunkt für den Forschungserfolg der recycelten Fasern sind konkurrenzfähige Anwendungen. Die hat das STFI nicht nur am Auto, sondern auch im Sport-Freizeitsektor sowie in der Medizintechnik gefunden, so in Komponenten für Computertomographen. "Während Metalle oder Glasfasern als potenzielle Konkurrenzprodukte Schatten werfen, stört Carbon die Bilddarstellung nicht und kann seine Vorteile voll ausspielen“, erläutert Hofmann.

Papier-Knowhow nutzen
Können recycelte Carbonfasern nochmals den Produktkreislauf durchlaufen, verbessert das ihre CO2-Bilanz deutlich. Zugleich gilt: Je kürzer die Carbonfasern, desto unattraktiver sind sie für die weitere Verwertung. Vor diesem Hintergrund entwickelten das Forschungsinstitut Cetex und die Papiertechnische Stiftung (PTS), beide Mitglieder der Zuse-Gemeinschaft, im Rahmen eines Forschungsvorhabens ein neues Verfahren, das bislang wenig geeignet erscheinende Recycling-Carbonfasern ein zweites Produktleben gibt. „Während klassische Textilverfahren die ohnehin sehr spröden Recycling-Carbonfasern in Faserlängen von mind. 80 mm trocken verarbeiten, beschäftigten wir uns mit einem Verfahren aus der Papierindustrie, welches die Materialien nass verarbeitet. Am Ende des Prozesses erhielten wir, stark vereinfacht gesprochen, eine flächige Matte aus recycelten Carbonfasern und Kunststofffasern“, erläutert Cetex-Projektingenieur Johannes Tietze das Verfahren, mit dem auch 40 mm kurze Carbonfasern zu attraktiven Zwischenprodukten recycelt werden können. Das danach in einem Heißpressprozess entstandene Erzeugnis dient als Grundmaterial für hochbelastbare Strukturbauteile. Zusätzlich wurden die mechanischen Eigenschaften der Halbzeuge durch die Kombination mit endlosfaserverstärkten Tapes verbessert. Das Recyclingprodukt soll, so die Erwartung der Forschenden, glasfaserverstärkten Kunststoffen, Konkurrenz machen, z.B. bei Anwendungen im Schienen- und Fahrzeugbau. Die Ergebnisse fließen nun in weiterführende Forschung und Entwicklung im Kooperationsnetzwerk Ressourcetex ein, einem geförderten Verbund von 18 Partnern aus Industrie und Wissenschaft.

Erfolgreiche Umsetzung in der Autoindustrie
Industriereife Lösungen für die Verwertung von Carbonfaser-Produktionsabfällen werden im Thüringischen Institut für Textil- und Kunststoff-Forschung Rudolstadt (TITK) entwickelt. Mehrere dieser Entwicklungen wurden mit Partnern beim Unternehmen SGL Composites in Wackersdorf industriell umgesetzt. Die Aufbereitung der so genannten trockenen Abfälle, hauptsächlich aus Verschnittresten, erfolgt nach einem eigenen Verfahren. „Dabei führen wir die geöffneten Fasern verschiedenen Prozessen zur Vliesherstellung zu“, sagt die zuständige Abteilungsleiterin im TITK, Dr. Renate Lützkendorf. Neben den Entwicklungen für den Einsatz z.B. im BMW i3 in Dach oder Hintersitzschale wurden im TITK spezielle Vliesstoffe und Verfahren für die Herstellung von Sheet Molding Compounds (SMC) etabliert, das sind duroplastische Werkstoffe, die aus Reaktionsharzen und Verstärkungsfasern bestehen und zum Pressen von Faser-Kunststoff-Verbunden verwendet werden. Eingang fand dies z.B. in einem Bauteil für die C-Säule des 7er BMW. „In seinen Projekten setzt das TITK vor allem auf die Entwicklung leistungsfähigerer Prozesse und kombinierter Verfahren, um den Carbonfaser-Recyclingmaterialien auch von den Kosten her bessere Chancen in Leichtbauanwendungen einzuräumen“, betont Lützkendorf. So liege der Fokus gegenwärtig auf dem Einsatz von CF-Recyclingfasern in thermoplastischen Prozessen zur Platten- und Profilextrusion. „Ziel ist es, die Kombination von Kurz- und Endlosfaserverstärkung in einem einzigen, leistungsfähigen Prozess-Schritt zu realisieren.“

True Temper Sports, leading designers and manufacturers of golf shafts, has chosen to partner with Hexcel on its latest product line, the HZRDUS Smoke Black RDX. The HZRDUS Smoke Black RDX is the first golf shaft to use Hexcel’s new HexTow® HM54 carbon fiber, which is ideal for recreational applications.

HZRDUS has emerged as one of the most dominant shafts at all levels of golf over the past 50 years, and the RDX is the next evolution in the HZRDUS line. By partnering with Hexcel to incorporate HexTow HM54, True Temper has taken its designs to the next level. HZRDUS Smoke Black RDX is the first golf shaft to use HexTow HM54 high modulus carbon fiber and combines it with high tensile strength HexTow® IM2C carbon fiber to provide the ideal blend of stiffness and stability desired by engineers to build into the HZRDUS shafts.

True Temper Sports is the No. 1 shaft in golf. It has been used to win more professional golf tournaments than any other shaft manufacturer. True Temper Sports offer shafts under the True Temper, Project X, ACCRA, Aerotech, and Grafalloy brands.

In the joint project "AeroFurnace" funded by the German Federal Ministry of Economic Affairs and Energy (BMWi), the consortium, consisting of the Bavarian Center for Applied Energy Research e.V. (ZAE Bayern) as joint coordinator, the furnace manufacturer FCT Systeme, and SGL Carbon has succeeded in improving the thermal insulation properties of a new composite material by up to 120 percent compared to commercially available felt-based carbon materials. This enabled the project partners to move into a new quality level of thermal insulation in high-temperature industrial applications and pave the way for more energy efficient thermal insulation.

Dr. Gudrun Reichenauer, coordinator of the joint project and head of the work group Nanomaterials at ZAE Bayern: "In this project, we have been able to make the latest findings from the world of nanomaterials accessible to the market through intensive cooperation and thus set new standards in the field of thermal insulation materials."

Dr. Thomas Kirschbaum, project manager at SGL Carbon: "In furnace simulations at the partner FCT, we have already been able to demonstrate what the new material can do: Depending on the temperature program, up to 40 percent of the required process energy can be saved with the new thermal insulation material. The potential of the new material is great." This prediction will be reviewed under real conditions in a demonstrator component in the second half of 2020 as part of the still ongoing BMWi project.

Dr. Jürgen Hennicke, project lead and head of R&D at FCT Systeme: "As a leading manufacturer of industrial vacuum or inert gas high temperature furnaces, the new generation of insulating materials enables us to create furnaces with a more favorable ratio of usable space to external dimensions, thus offering customers improved cost efficiency and productivity".

Based on laboratory samples in plate form it has already been demonstrated that the production of the new material can be represented by technically simple processes and is in principle well scalable. However, there is still a long way to go before the product is ready for serial production.

The third largest share of final energy in Germany is used for the generation of heat in industrial processes (22.6 percent). In many industries, e.g. in the steel and ceramics industry, energy-intensive high-temperature processes run above 1000°C – these alone require almost 50 percent of the industrial process heat. Suitable thermal insulation materials can significantly reduce energy demand while maintaining the same usable volume.

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.”

At this year’s JEC World, the largest trade fair for composites held from March 3-5, 2020 in Paris, SGL Carbon will focus on the topic of serial production for the automotive, aerospace and industrial sectors. The key is customized solutions with individual component designs combined with tailored materials and production processes ready for large scale production. Under the motto “The Solution Provider,” the company will present selective innovative component solutions from all three areas in Hall 6, Booth D25. Furthermore, as an example for industrial applications, SGL Carbon will showcase at the JEC world a crossbeam made of carbon fiber reinforced plastics (CFRP) used in automated Schuler press lines.

•    Composite battery enclosures for e-mobility
•    Flexible new leaf spring generation for rear axles
•    Innovative component designs for passenger airplanes, helicopters and air taxis
•    Extremely lightweight and stable transfer beam for mechanical engineering

Selective applications with focus on serial production
In the field of automotive applications, SGL Carbon will present at the JEC World composite battery enclosures as a promising new application driven by increasing demand for electric vehicles and the resulting new flexible chassis platforms. The company demonstrates a prototype of a battery enclosure based on carbon fibers. However, hybrid composites with a mixture of glass and carbon fibers are also possible.

In the aerospace sector, SGL Carbon is also expanding its portfolio of realized projects and expertise relying on the trend to use more efficient materials and processes in this industry too.
In the area of primary structure components, the company will present a demo exhibit for the door frame of a passenger airplane realized in collaboration with external partners and based on 50k carbon fiber from the SGL Carbon, which is suitable for serial production.

Live simulations and intense exchange at the booth
Visitors can experience live how their ideas can be implemented both sustainably and cost-effectively in composites thanks to simulations. Experts from the company’s own Lightweight and Application Center demonstrate the path from the concept to virtual prototypes using simulation software, with the result visible either to the entire audience or just individual visitors. To prepare, interested parties can contact the team now at the following link: https://www.sglcarbon.com/anmeldung-jec.

On March 4, 2020, the SGL Carbon stand will host its traditional get-together for customers and friends starting at 4 p.m. – no registration necessary.
 

Automatized quality control of gas diffusion layers for fuel cells at SGL Carbon in Meitingen

• One of only two awarded overseas suppliers
• Long-term cooperation for a substantial production ramp-up

Mid of January SGL Carbon received the “Supplier of the Year 2019” award for excellence in quality management and contributions to strengthen the overall competitiveness of Hyundai Motor Group related to the manufacturing and supply of fuel cell components. The award is being granted by the Korean automaker once a year, evaluating several hundreds of suppliers from across the world in different categories. This time only two overseas suppliers have been awarded.

SGL Carbon and the Hyundai Motor Group have been cooperating on fuel cell technology for almost 20 years. Last year, the two companies agreed on an early extension to the existing supply agreement for SIGRACET® gas diffusion layers for the NEXO fuel cell car, encompassing a new long-term cooperation including a substantial ramp-up of the current production and supply volumes.

A new non-halogenated FR compound called PAL...VersaCHARTM can achieve a new level of flame retardant performance as a coating for nonwovens and technical textiles.

PAL...VersaCHARTM has been tested to 1,950°C – the highest to date – and shown to prevent all flaming drips of polymer. Char bodies form on the compound surface, protecting against flame creation and delaying heat transfer. Rapid self- extinguishing burn behaviour protects any underlying substrate to which it is adhered.

The compound has passed ASTM E84 (Class A) with a 15/10 rating, which includes ‘clean’ smoke generation of only 2.3% of the allowable ASTM smoke limits. In addition, the compound is light weight, at a specific gravity of 1.0, and 100% non-toxic in every respect, being free from heavy metals, halogens and VOCs. 

Other properties include excellent cold crack performance, hydrophobicity, printability, extreme chemical resistance and the ability to be custom tailored for specific needs such as UV or antimicrobial performance, as volume warrants. The compound is also very competitively priced.

In addition to its use as a coating, PAL...VersaCHARTM compound can be produced as a flexible film or sheet and moulded to shape or over-moulded to most materials, including metal for corrosion resistance. As a polymeric compound it can be cast or calendered and typical durometers from 80-99A for flexible-to-high rigid formats are practical. 

Separately, an adhesive has been created which bonds to many surfaces. In internal evaluations of two laminated plies of woven carbon fibre and two plies of glass fabrics, both passed a 60 second vertical burn with no ply separation, distortion or flaming drips from the adhesive.

Dynamic Modifiers envisages many uses for PAL...VersaCHARTM, from aerospace to the protection of rigid structural materials in building interiors etc.