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STFI: Lightweight construction innovations at JEC World in Paris (c) silbaerg GmbH and STFI (see information on image)
23.02.2024

STFI: Lightweight construction innovations at JEC World in Paris

At this year's JEC World, STFI will be presenting highlights from carbon fibre recycling as well as a new approach to hemp-based bast fibres, which have promising properties as reinforcement in lightweight construction.

Green Snowboard
At JEC World in Paris from 5 to 7 March 2024, STFI will be showcasing a snowboard from silbaerg GmbH with a patented anisotropic coupling effect made from hemp and recycled carbon fibres with bio-based epoxy resin. In addition to silbaerg and STFI, the partners Circular Saxony - the innovation cluster for the circular economy, FUSE Composite and bto-epoxy GmbH were also involved in the development of the board. The green snowboard was honoured with the JEC Innovation Award 2024 in the “Sport, Leisure and Recreation” category.

At this year's JEC World, STFI will be presenting highlights from carbon fibre recycling as well as a new approach to hemp-based bast fibres, which have promising properties as reinforcement in lightweight construction.

Green Snowboard
At JEC World in Paris from 5 to 7 March 2024, STFI will be showcasing a snowboard from silbaerg GmbH with a patented anisotropic coupling effect made from hemp and recycled carbon fibres with bio-based epoxy resin. In addition to silbaerg and STFI, the partners Circular Saxony - the innovation cluster for the circular economy, FUSE Composite and bto-epoxy GmbH were also involved in the development of the board. The green snowboard was honoured with the JEC Innovation Award 2024 in the “Sport, Leisure and Recreation” category.

VliesComp
The aim of the industrial partners Tenowo GmbH (Hof), Siemens AG (Erlangen), Invent GmbH (Braunschweig) and STFI united in the VliesComp project is to bring recycled materials back onto the market in various lightweight construction solutions. The application fields "Innovative e-machine concepts for the energy transition" and "Innovative e-machine concepts for e-mobility" were considered as examples. On display at JEC World in Paris will be a lightweight end shield for electric motors made from hybrid nonwovens - a mixture of thermoplastic fibre components and recycled reinforcing fibres - as well as nonwovens with 100% recycled reinforcing fibres. The end shield was ultimately manufactured with a 100% recycled fibre content. The tests showed that, compared to the variant made from primary carbon fibres using the RTM process, a 14% reduction in CO2 equivalent is possible with the same performance. The calculation for the use of the prepreg process using a bio-resin system shows a potential for reducing the CO2 equivalent by almost 70 %.

Bast fibre reinforcement
To increase stability in the plant stem, bast fibres form in the bark area, which support the stem but, in contrast to the rigid wood, are very flexible and allow slender, tall plants to move in the wind without breaking.A new process extracts the bast bark from hemp by peeling.The resulting characteristic values, such as tensile modulus of elasticity, breaking strength and elongation, are very promising in comparison with the continuous rovings made of flax available on the market.The material could be used as reinforcement in lightweight construction.At JEC World, STFI will be exhibiting reinforcing bars that have been processed into a knitted fabric using a pultrusion process based on bio-based reinforcing fibres made from hemp bast for mineral matrices.

Source:

Sächsische Textilforschungsinstitut e.V. (STFI)

Mobile robot system for automated loading of a bobbin creel (c) STFI
12.05.2022

STFI with sustainable and digital innovations at Techtextil 2022

The Saxon Textile Research Institute (STFI) will be presenting innovative highlights from research and development at Techtextil 2022, the international trade fair for technical textiles and nonwovens. In addition to a warp-knitted textile façade greening in a modular system and textile lightweight construction elements for the building sector made from hemp as a renewable raw material, the STFI will also be showing innovations from nonwovens research. The project optiformTEX is an example of the nonwovens competence: in this project, the mass per unit area was specifically influenced for the production of semi-finished products in the automotive sector. Furthermore, the Chemnitz Institute exhibits an ecological foam coating for protective textiles. Central highlight of the STFI's presence at the fair is also a mobile robot system, which demonstrates the automated loading of a small-scale bobbin creel.

The Saxon Textile Research Institute (STFI) will be presenting innovative highlights from research and development at Techtextil 2022, the international trade fair for technical textiles and nonwovens. In addition to a warp-knitted textile façade greening in a modular system and textile lightweight construction elements for the building sector made from hemp as a renewable raw material, the STFI will also be showing innovations from nonwovens research. The project optiformTEX is an example of the nonwovens competence: in this project, the mass per unit area was specifically influenced for the production of semi-finished products in the automotive sector. Furthermore, the Chemnitz Institute exhibits an ecological foam coating for protective textiles. Central highlight of the STFI's presence at the fair is also a mobile robot system, which demonstrates the automated loading of a small-scale bobbin creel.

Highlights at Techtextil 2022
The greened façade tile is a system with which large building surfaces can be cost-effectively greened through a simple, modular segment structure. In addition to insulating the building, the system has been created to meet the design requirements of a modern city centre; low-maintenance greening is made possible through functional integration in the textile carrier layer and coordinated plant selection.

Moulded components made of natural fibre nonwovens are increasingly used in the automotive sector. Conventional nonwovens currently have uniform masses per unit area. Technical solutions for load-oriented component reinforcement and the resulting optimised use of materials represent an enormous economic potential. The basic idea of “optiformTEX” was therefore to specifically influence the mass per unit area distribution in the pile before the semi-finished product is consolidated. As a result, a textile-technological process and the corresponding plant component were successfully developed.

Future-oriented materials are offered by developments from the field of renewable raw materials in combination with bio-based resin systems: In the “Gro-Coce” project, an innovative ceiling system was developed by combining sustainable building products and methods. Currently, a high-performance hemp-based semi-finished product as well as the steps for its reproducible production by means of textile surface formation is developed by the research team. Initial application and load tests of the hemp-based semi-finished products on wooden beams confirmed the high performance potential of the natural fibre materials.

Special functional textiles are based on composite materials with coatings or membranes. The previous production of the coatings/membranes poses ecological and health risks. At STFI, solvent-free, purely aqueous coating systems and a technology for their application were therefore developed for the protective textile sector, resulting in a breathable, waterproof and wash-resistant textile coating.

The central highlight of the STFI's presence at the fair is a mobile robot system, which demonstrates the automated loading of a small-scale bobbin creel. At the STFI, the robot is part of the “textile factory of the future”, where a play mat is woven and processed step by step along the textile chain.

(c) STFI / Dirk Hanus
13.04.2022

STFI zeigt nachhaltige Leichtbauneuheiten zur JEC

Im Mittelpunkt des Messeauftritts des Sächsischen Textilforschungsinstitut e.V. (STFI) stehen im Jahr 2022 aktuelle Entwicklungen, die sich dem Recycling und der Nachhaltigkeit von Leichtbauwerkstoffen widmen. Der Einsatz von rezyklierten Hochleistungsfasern wird an diversen Anwendungsbeispielen aus den Bereichen Sport und Freizeit sowie Mobilität erlebbar gemacht. Beispielsweise werden die Ergebnisse des zum 30.03.2022 beendeten IGF-Vorhabens „VliesSMC“ präsentiert. Gemeinsam mit dem Forschungspartner Fraunhofer ICT, Pfinztal, wurde im Rahmen des Projektes der Einsatz von rezyklierten Carbonfasern in der SMC-Prozesskette detailliert untersucht. Hierzu wurden zunächst Vliesstoffe entwickelt, die es ermöglichen, die rezyklierten Carbonfasern der SMC-Anlage zuzuführen. Die hergestellten SMC-Halbzeuge konnten anschließend sowohl im Form- als auch Fließpressverfahren verarbeitet werden. Der Benchmark mit konventionellen SMC-Produkten zeigte, dass bei niedrigerem Faservolumengehalt vergleichbare Kennwerte erzielt werden konnten.

Im Mittelpunkt des Messeauftritts des Sächsischen Textilforschungsinstitut e.V. (STFI) stehen im Jahr 2022 aktuelle Entwicklungen, die sich dem Recycling und der Nachhaltigkeit von Leichtbauwerkstoffen widmen. Der Einsatz von rezyklierten Hochleistungsfasern wird an diversen Anwendungsbeispielen aus den Bereichen Sport und Freizeit sowie Mobilität erlebbar gemacht. Beispielsweise werden die Ergebnisse des zum 30.03.2022 beendeten IGF-Vorhabens „VliesSMC“ präsentiert. Gemeinsam mit dem Forschungspartner Fraunhofer ICT, Pfinztal, wurde im Rahmen des Projektes der Einsatz von rezyklierten Carbonfasern in der SMC-Prozesskette detailliert untersucht. Hierzu wurden zunächst Vliesstoffe entwickelt, die es ermöglichen, die rezyklierten Carbonfasern der SMC-Anlage zuzuführen. Die hergestellten SMC-Halbzeuge konnten anschließend sowohl im Form- als auch Fließpressverfahren verarbeitet werden. Der Benchmark mit konventionellen SMC-Produkten zeigte, dass bei niedrigerem Faservolumengehalt vergleichbare Kennwerte erzielt werden konnten.

Zukunftsweisende Materialien bieten zudem die Entwicklungen aus dem Bereich nachwachsender Rohstoffe in Kombination mit biobasierten Harzsystemen. Das Projekt Gro-Coce verfolgte das Ziel, durch die Verbindung nachhaltiger Bauprodukte und -weisen ein innovatives Deckensystem zu entwickeln, welches auf Grundlage der Holz-Beton-Verbundbauweise (HBV-Bauweise) als ökonomische und ökologisch vorteilhafte Alternative zu den momentan vorherrschenden, energie- und ressourcenintensiven Deckenkonstruktionen aus Stahlbeton funktioniert. Das Deckensystem besteht aus Holzstegen, deren Zugzone durch hochleistungsfähige hanffaserbasierte Armierungstextilien verstärkt wird. Dadurch gelingt eine deutliche Reduktion des notwendigen Holzquerschnittes und eine anforderungsgerechtere sowie verantwortungsvollere Nutzung des Querschnitts für alle üblichen Spannweiten des Hoch- und Geschossbaus. Ziel war die Verwirklichung hoher mechanischer Kennwerte der Fasern, bei gleichzeitig geringer Streuung der Materialeigenschaften, um ein im Vergleich zu industriell gefertigten Fasern konkurrenzfähiges und nachhaltiges Produkt aufbieten zu können.

Zudem stellt das STFI neueste Möglichkeiten zur kontinuierlichen Herstellung von Organoblechen vor. Unter Einsatz einer Intervallheißpresse wurden in den letzten Jahren Organobleche auf Basis unterschiedlichster Verstärkungsstrukturen in Kombination mit thermoplastischen Matrixsystemen entwickelt. Die Palette reicht dabei vom industrieüblichen PP und PA bis hin zu hochtemperaturbeständigen Polymeren wie PPS oder PEI.

Source:

Sächsische Textilforschungsinstitut e.V. (STFI)