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Flachs-Koeper-Band (c) vombaur
Flachs-Koeper-Band
20.09.2023

Technical textiles made of natural fibres: Sustainable textiles for lightweight design

The combination of high strength and rigidity with sustainability and a neutral carbon footprint makes flax the ideal raw material for natural fibre-reinforced plastics. vombaur offers composite textiles made of this natural fibre for the automotive, wind power, construction or sports industries and many other sectors.

Flax fibres are rigid and tear-proof. They have natural bactericidal properties, are virtually antistatic, stain resistant and easy to spin. Humans have taken advantage of these properties to manufacture robust, stain-resistant and lint-free textiles. Between the late 19th and late 20th centuries, cotton largely replaced natural fibres. Because flax can be grown in Europe and consumes less energy and water than cotton production, the material's importance is currently growing again, for both clothing and composites. Regional textile value added chains in Europe – flax makes them possible.

The combination of high strength and rigidity with sustainability and a neutral carbon footprint makes flax the ideal raw material for natural fibre-reinforced plastics. vombaur offers composite textiles made of this natural fibre for the automotive, wind power, construction or sports industries and many other sectors.

Flax fibres are rigid and tear-proof. They have natural bactericidal properties, are virtually antistatic, stain resistant and easy to spin. Humans have taken advantage of these properties to manufacture robust, stain-resistant and lint-free textiles. Between the late 19th and late 20th centuries, cotton largely replaced natural fibres. Because flax can be grown in Europe and consumes less energy and water than cotton production, the material's importance is currently growing again, for both clothing and composites. Regional textile value added chains in Europe – flax makes them possible.

Ideal mechanical properties
vombaur makes the mechanical properties of flax usable for lightweight design. Because flax fibres are particularly rigid and tear-resistant, they ensure great stability in natural fibre-reinforced plastics (NFRPs). And thanks to their low density of 1.50 g/cm3, the fibres weigh virtually nothing. On top of this, fibre-reinforced plastics are less prone to splintering than glass fibre-reinforced plastics.

Excellent carbon footprint
The cultivation of flax binds CO2 and the production of natural fibre-reinforced plastics (NFRPs) generates approximately one third less CO2 emissions compared with conventional fibre-reinforced plastics. Energy consumption is substantially lower. This saves resources. The use of flax fibre tapes by vombaur in lightweight design applications also improves the product's carbon footprint and contributes to a secure, regional supply chain.

Recycling without impacting on quality
Flax offers another sustainability benefit: more recycling cycles than glass- or carbon fibre-reinforced plastics – without impacting on quality. Thermoplastic fibre-matrix prepregs are melted and reused in the recycling process. The natural fibres can be used in other products such as natural fibre-reinforced injection moulded parts.

Sustainable product developments for many industries
"Orthoses for high-performance sports, high-tech skis, wind turbines, components for the automotive industry or aerospace, but also modern window profiles – the application scope for our lightweight design flax tapes is amazingly diverse", as Carl Mrusek, Chief Sales Officer at vombaur explains. "After all, wherever flax tapes are used, three key properties come together: light weight, strength and sustainability".

More information:
CO2
Source:

vombaur

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Photo: AVK
26.05.2023

AVK: Successful Flame Retardancy Conference in Berlin

  • Flame Retardancy for Composites Applications in the Transport Sector

On 10-11 May 2023, the AVK - Industrievereinigung Verstärkte Kunststoffe e. V. in cooperation with the FGK - Forschungsgesellschaft Kunststoffe e.V. in Berlin organised for the first time an international, English-language conference on flame retardancy.

In 18 compact lectures, more than 20 experts informed nearly 80 participants about new developments, requirements and innovations regarding specific flame retardant properties of components made of fibre-reinforced plastics/composites for the transport sector.

Among others, there were presentations by industry representatives from Saertex, BÜFA, Clariant, Diehl Aviation and Airbus, but also from institutes such as the Fraunhofer Institutes or the Federal Institute for Materials Research and Testing. Presentations on the topics of standardisation, raw materials, automotive or recycling were on the agenda, but also flame retardants for connectors and battery housings for electric vehicles or fire-retardant systems for rail vehicles or fire-retardant CFRP made from recycled CF nonwoven were presented.

  • Flame Retardancy for Composites Applications in the Transport Sector

On 10-11 May 2023, the AVK - Industrievereinigung Verstärkte Kunststoffe e. V. in cooperation with the FGK - Forschungsgesellschaft Kunststoffe e.V. in Berlin organised for the first time an international, English-language conference on flame retardancy.

In 18 compact lectures, more than 20 experts informed nearly 80 participants about new developments, requirements and innovations regarding specific flame retardant properties of components made of fibre-reinforced plastics/composites for the transport sector.

Among others, there were presentations by industry representatives from Saertex, BÜFA, Clariant, Diehl Aviation and Airbus, but also from institutes such as the Fraunhofer Institutes or the Federal Institute for Materials Research and Testing. Presentations on the topics of standardisation, raw materials, automotive or recycling were on the agenda, but also flame retardants for connectors and battery housings for electric vehicles or fire-retardant systems for rail vehicles or fire-retardant CFRP made from recycled CF nonwoven were presented.

More information:
AVK Composites flame retardant
Source:

AVK

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© ITM/TU Dresden
Woven hemisphere for usage in radome antennaes
15.12.2022

AVK Innovation Award 2022 to young engineers from ITM at TU Dresden

  • Award for near-net-shape 3D meshes for use in fibre-reinforced plastics

As part of the JEC FORUM DACH 2022, the AVK Innovation Awards were presented in Augsburg on November 29th. The innovation price in the category "Research/Science" (first place) was awarded to the team of scientists Dipl.-Ing. Dominik Nuss, Dr.-Ing. Cornelia Sennewald and Prof. Dr.-Ing. habil. Chokri Cherif.

With the development of the pull-off-free Jacquard weaving technology including the technological know-how in the field of highly complex 2D and 3D fabric geometries, which has been established at the ITM of the TU Dresden for many years, Dominik Nuss has succeeded in including different yarn lengths locally into the fabric structure solely through targeted variation of the fabric weave. There-fore, it is now possible to produce completely new types of fabrics without additional draping, especially spherically curved fabrics, but also large-format spiral or even curved fabrics. The fact that the required near-net-shape geometry of the component to be reinforced can be reproduced with significantly reduced preforming steps is to be emphasized.

  • Award for near-net-shape 3D meshes for use in fibre-reinforced plastics

As part of the JEC FORUM DACH 2022, the AVK Innovation Awards were presented in Augsburg on November 29th. The innovation price in the category "Research/Science" (first place) was awarded to the team of scientists Dipl.-Ing. Dominik Nuss, Dr.-Ing. Cornelia Sennewald and Prof. Dr.-Ing. habil. Chokri Cherif.

With the development of the pull-off-free Jacquard weaving technology including the technological know-how in the field of highly complex 2D and 3D fabric geometries, which has been established at the ITM of the TU Dresden for many years, Dominik Nuss has succeeded in including different yarn lengths locally into the fabric structure solely through targeted variation of the fabric weave. There-fore, it is now possible to produce completely new types of fabrics without additional draping, especially spherically curved fabrics, but also large-format spiral or even curved fabrics. The fact that the required near-net-shape geometry of the component to be reinforced can be reproduced with significantly reduced preforming steps is to be emphasized.

Continuous simulation aided engineering from CAD design to integrally woven 2D and 3D preforms by means of highly complex weave development for spatial constructions is a unique at the ITM, which was indispensable for the development of these promising woven high-tech structures. This technology is completely new and has never been carried out in this way before. The fabric structures are characterised by a high innovation level due to their geometric diversity and purposes. It can be used in numerous applications and further more contributes to the development of completely new fields of application. The technology can be implemented on all Jacquard weaving machines with only an additional device and the preform geometry is only determined by the control of the Jacquard machine. The preform geometry can be used in the full working width of the weaving machine.

Professor Chokri Cherif, Institute Director of the ITM, and his team are very pleased about these continuous research success in the constantly growing research field of 3D weaving technology, which are achieved at the ITM in close cooperation with industry and users. "This award is a special honour for our institute and confirms that the many years of our excellent research in the field of near-net-shape 3D weaving for the fibre-reinforced plastics sector plays a significant role and that we are making a significant contribution to the sustainable and resource-efficient production of lightweight structures with our development".

More information:
fibre-reinforced plastics AVK innovation award JEC Forum DACH ITM
Source:

ITM/TU Dresden

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(c) AVK - Industrievereinigung Verstärkte Kunststoffe e. V.
24.11.2021

The AVK – Industrievereinigung Verstärkte Kunststoffe – presents its Innovation Awards 2021

The AVK – Industrievereinigung Verstärkte Kunststoffe – has once again presented its Innovation Awards to companies, institutes and their partners. Three composites innovations were recognised in each of the three categories – “Innovative Products/Applications”, “Innovative Processes” and “Research and Science” – at the new event JEC Forum DACH on 23 November 2021, the first edition of which was held in Frankfurt.

“As usual, the submissions included a lot of very interesting and promising products and processes this year. The Innovation Awards highlight the outstanding efficiency, cost-effectiveness and sustainability of fibre-reinforced plastics as well as the companies and institutes operating in the sector,” explains Dr. Elmar Witten, Managing Director of the AVK. The jury of leading experts from the industry honoured the following innovations this year:

The AVK – Industrievereinigung Verstärkte Kunststoffe – has once again presented its Innovation Awards to companies, institutes and their partners. Three composites innovations were recognised in each of the three categories – “Innovative Products/Applications”, “Innovative Processes” and “Research and Science” – at the new event JEC Forum DACH on 23 November 2021, the first edition of which was held in Frankfurt.

“As usual, the submissions included a lot of very interesting and promising products and processes this year. The Innovation Awards highlight the outstanding efficiency, cost-effectiveness and sustainability of fibre-reinforced plastics as well as the companies and institutes operating in the sector,” explains Dr. Elmar Witten, Managing Director of the AVK. The jury of leading experts from the industry honoured the following innovations this year:

Category “Research and Science”
First place in the “Research and Science” category was awarded to the German Aerospace Center (DLR) for its Bondline Control Technology (BCT). This innovative process is used for quality control and assurance of bonded joints. The core element is a porous fabric which is applied to a joining surface using an epoxy adhesive or matrix resin. Peeling away the fabric creates a chemically reactive and undercut surface and can also be used as a test to check adhesion to the substrate. BCT has potential in a variety of possible applications. For example, peel ply can be replaced by BCT fabric to produce composite components with an optimised joining surface. The cost-effective BCT peel test is suitable for coupon testing and process control. In addition, the combined adhesion test and surface pre-treatment can be used for quality assurance of bonded repairs on fibre composite structures.

Second place was taken by the Institute of Textile Technology (ITA) at RWTH Aachen University and its partners AEROVIDE GmbH, Altropol Kunststoff GmbH, Basamentwerke Böcke GmbH, TechnoCarbon Technologies GbR with “StoneBlade – Lightweight construction with granite for the wind industry”. This innovation enables manufacturers to reduce the amount of non-recyclable materials used in rotor blade construction. At the same time, it reduces the weight of these components and improves the mechanical properties relating to the stability of wind turbines. The innovative approach replaces glass-fibre reinforced plastic in the blade components with hard rock – a natural, cost-effective and recyclable lightweight material. The slabs of rock are cut and ground to a thickness of just a few millimetres and embedded in a fibre composite laminate with carbon fibre, which stabilises them for alternating load cases. The pre-stressed material is pressure-stable in the composite and can absorb tensile forces in the event of continuously alternating loads without any loss of stiffness.

Third place went to the Dresden University of Technology – Institute for Lightweight Construction and Plastics Technology (ILK) with its partner Mercedes Benz AG for the interdisciplinary development of a highly integrated inductive charging module for electric vehicles. The ultra-thin charging module was designed to make optimum use of space in the vehicle underbody without reducing ground clearance. An interdisciplinary approach was adopted for the development process. This involved the electrical, mechanical and process characterisation of high-frequency Litz wires, ferromagnetic foil and metal wire cloth as well as the creation of a simulation model. The result is a demonstrator for a charging system with a structural height of 15 mm and a total weight of 8 kg. It achieves a transmission efficiency of up to 92 percent at 7.2 kW nominal power and active air cooling. The hardware demonstrator was fabricated in a 3-step process using RTM and VARI techniques.

Overview of all the winners in the three categories:
Category “Innovative Products/Applications”
1st Place: “Traffic signs from Nabasco (N-BMC)” – Nabasco Products BV and Lorenz Kunststofftechnik GmbH, partners: Pol Heteren BV and NPSP BV
2nd Place: “Novel, ultratough vinyl ester resin for the construction of large marine vessels” Evonik Operations GmbH
3rd Place: “Air intake housing with a multi-material design for gas turbines” – MAN Energy Solutions SE, Leichtbau-Zentrum Sachsen GmbH and Leichtbau-Systemtechnologien KORROPOL GmbH.
Category “Innovative Processes”
1st Place: “In-mould wrapping” off-tool, film-coated, fibre composite components for exterior applications – BMW Group, Partner: Renolit SE
2nd Place: “Adaptive automated repair of composite structural components in the aviation sector” – Lufthansa Technik AG, Partner: iSAM AG
3rd Place: “Automated surface pre-treatment using VUV excimer lamps” – CTC GmbH
Category “Research and Science”
1st Place: “Bondline Control Technology (BCT)” – German Aerospace Center (DLR)
2nd Place: “StoneBlade – Lightweight construction with granite for the wind industry” – Institute of Textile Technology at RWTH Aachen University, Partners: AEROVIDE GmbH, Altropol Kunststoff GmbH, Basamentwerke Böcke GmbH, TechnoCarbon Technologies GbR
3rd Place: “Interdisciplinary development of a highly integrated inductive charging module for electric vehicles” – Dresden University of Technology – Institute for Lightweight Construction and Plastics Technology (ILK), Partner: Mercedes Benz AG

Submissions for the next Innovation Award can be made from the end of January 2022.

More information:
AVK AVK - Industrievereinigung Verstärkte Kunststoffe e. V. AVK innovation award
Source:

AVK - Industrievereinigung Verstärkte Kunststoffe e. V.

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