From the Sector

The German Institutes of Textile and Fiber Research Denkendorf (DITF) are coordinating the research project, which is funded as part of the European Union's Horizon Europe research and innovation program. The aim of BioFibreLoop is to develop recyclable outdoor and work clothing made from renewable bio-based materials. The kick-off event took place in Denkendorf on June 26 and 27, 2024.

The textile industry is facing two challenges: on the one hand, production must become more sustainable and environmentally friendly and, on the other, consumers are expecting more and more smart functions from clothing.

In addition, the production of functional textiles often involves the use of chemicals that are harmful to the environment and health and make subsequent recycling more difficult.

Intelligent innovations must therefore ensure that harmful chemicals are replaced, water is saved and more durable, recyclable bio-based materials are used, thereby reducing the usually considerable carbon footprint of textile products. Digitalized processes are intended to ensure greater efficiency and a closed cycle.

For example, the BioFibreLoop project uses laser technology to imitate natural structures in order to produce garments with water and oil-repellent, self-cleaning and antibacterial properties. At the end result of the research work will be affordable, resource and environmentally friendly, yet high-performance and durable fibers and textiles made from renewable sources such as lignin, cellulose and polylactic acid will be available. All processes are aimed at a circular economy with comprehensive recycling and virtually waste-free functionalization based on nature's example. In this way, greenhouse gas emissions could be reduced by 20 percent by 2035.

The technology for the functionalization and recycling of bio-based materials is being developed in three industrial demonstration projects in Austria, the Czech Republic and Germany. At the end of the project, a patented circular, sustainable and reliable process for the production of recyclable functional textiles will be established.

The BioFibreLoop project has a duration of 42 months and a total budget of almost 7 million euros, with 1.5 million going to the coordinator DITF.

The consortium consists of 13 partners from nine countries who contribute expertise and resources from science and industry:

• German Institutes of Textile and Fiber Research Denkendorf (DITF), Coordinator, Germany
• Next Technology Tecnotessile Società nazionale di ricerca R. L., Italy
• Centre Technologique ALPhANOV, France
• G. Knopf’s Sohn GmbH & Co. KG, Germany
• FreyZein Urban Outdoor GmbH, Austria
• BEES - BE Engineers for Society, Italy
• BAT Graphics Vernitech, France
• Interuniversitair Micro-Electronica Centrum, Belgium
• Idener Research & Development Agrupacion de Interes Economico, Spain
• Teknologian tutkimuskeskus VTT Oy, Finland
• Det Nationale Forskningscenter for Arbejdsmiljø, Denmark
• Steinbeis Innovation gGmbH, Germany
• NIL Textile SRO, Czech Republic

Teijin Carbon Europe has been awarded ISCC PLUS certification (Certificate Number: ISCC-PLUS-Cert-DE100-15897124). This ISCC PLUS certification covers Tenax™ Carbon Fiber produced at the Heinsberg-Oberbruch plant in Germany. This accreditation enables the Teijin Group to offer its customers sustainable products that contribute to circular economy. Teijin has selected the ISCC certification route as the International Sustainability and Carbon Certification (ISCC) is an independent organisation and the leading certification system in this field.

The ISCC PLUS certification is a voluntary system which administers the circular economy of chemicals, plastics, packaging, textiles and renewable raw materials. Raw materials which are made from sustainable source materials (e.g. via recycling or bio-based sources) are labelled with a sustainability declaration (country of origin of the raw material, quantity and type of sustainable raw material, user ID, etc.). This document then follows the product during further processing – even over several stages – until it is used by the end customer. If all partners in the chain are ISCC PLUS certified, the documents can be passed on clearly and reliably.

The Teijin Group is globally establishing a carbon fiber production and supply system based on ISCC PLUS certification. The attractiveness of ISCC PLUS certification for the Teijin Group is exemplified by the future production of sustainable carbon fibers. Teijin uses various chemical building blocks for the internal production of polyacrylonitrile. Conventional and sustainable raw materials can now be purchased and processed on the global market. In future, Teijin also intends to purchase materials that are obtained via recycling or directly based on a bio-based source.

These raw materials will then be processed into a sustainable polyacrylonitrile precursor. As the production processes are identical to those used in the conventional production of carbon fibers, the mechanical and chemical properties are identical. Based on the sustainability declaration, a clear mass balance is used to differentiate between sustainable and conventional products.

The Teijin Group obtained ISCC PLUS certification for carbon fiber and the polyacrylonitrile (PAN) precursor fiber produced at Teijin's Mishima Plant in Shizuoka Prefecture, Japan in June 2023, and began mass production of carbon fiber based on the certification in December of the same year. The Teijin Group benefits from this approach as customers are offered products that contribute to the circular economy or continue to use conventional raw materials.

Stahl has joined the Global Organization for PHA (GO!PHA), a non-profit platform that advocates and advances the use of polyhydroxyalkanoates (PHAs), a naturally occurring polymer that offers a lower-impact, bio-based alternative to traditional fossil-based plastic feedstocks.  

GO!PHA is a coalition of over 60 stakeholders ranging from producers and formulators to users as well as universities and research institutes. The members, all early adopters of PHAs, work together to increase understanding of this relatively new PHA technology and advance the science behind these renewable, compostable and biodegradable materials. As a member of the network, Stahl will have the opportunity to join forces with the wider PHA value chain to help move PHAs beyond the testing phase and accelerate the potential application of the technology in the coatings market. 

Archroma has introduced a new bio-based durable water repellent (DWR) finish that helps mills and brands produce apparel that is soft to the touch and yet offers robust rain and stain protection and an improved sustainability profile.

PHOBOTEX® NTR-50 LIQ is designed to provide great water repellence on all kinds of fibers while achieving a soft handle and avoiding undesired effects like yellowing and chalk marking. It performs especially well on synthetic fibers and their blends, making it ideal for apparel, outdoor wear and home textiles.

The new DWR is based on 50% renewable carbon content based on ASTM D6866 and is free of per- and polyfluoroalkyl substances (PFAS) and formaldehyde. It is also crosslinker-free, which makes it more flexible in use. While offering good wash durability on its own, PHOBOTEX® NTR-50 LIQ can be combined with a crosslinker like ARKOPHOB® NTR-40, which has a biocarbon content of 40%, to further boost wash and/or dry-cleaning resistance.

Sportswear, fashion and home textiles treated with the PHOBOTEX® NTR-50 LIQ durable water repellent qualify for the High IQ® Repel assurance program. The High IQ® program assures consumers that these products deliver performance, protection and comfort and meet strict environmental standards.

Devan Chemicals launched its latest textile finishing technology “Devan Stain Release”, that ensures that both water and oil based stains can easily be washed off.

Devan ‘s new release finish prevents water and oil based stains such as ketchup, mud, grass, tea, vegetable and corn oils from adhering deeply to the fibres and allows stains to be washed off easily from the surface. The technology combines both stain release and wicking properties, fitting for applications where this dual benefit is required. This technology is PFC-free and has 40% of bio-based content. Unlike many PFC-based solutions that require mixing of multiple products, Devan Stain Release is an easy to apply and ready-to-use product that doesn’t necessitate mixing of different products. The finish doesn’t require reactivation after washing at home with high temperature. Soft handle is maintained.

Devan Stain Release is applicable across a wide range of textile applications, including school uniforms, garments, workwear, apparel, home textiles, bedding accessories and mattress ticking. The technology enhances the longevity of fabrics by reducing the need for frequent washing, ultimately contributing to a more sustainable consumption cycle.

The “Cellulose Fibres Conference 2024” held in Cologne on 13-14 March demonstrated the innovative power of the cellulose fibre industry. Several projects and scale-ups for textiles, hygiene products, construction and packaging showed the growth and bright future of this industry, supported by the policy framework to reduce single-use plastic products, such as the Single Use Plastics Directive (SUPD) in Europe.

40 international speakers presented the latest market trends in their industry and illustrated the innovation potential of cellulose fibres. Leading experts introduced new technologies for the recycling of cellulose-rich raw materials and gave insights into circular economy practices in the fields of textiles, hygiene, construction and packaging. All presentations were followed by exciting panel discussions with active audience participation including numerous questions and comments from the audience in Cologne and online. Once again, the Cellulose Fibres Conference proved to be an excellent networking opportunity to the 214 participants and 23 exhibitors from 27 countries. The annual conference is a unique meeting point for the global cellulose fibre industry.  

For the fourth time, nova-Institute has awarded the “Cellulose Fibre Innovation of the Year” Award at the Cellulose Fibres Conference. The Innovation Award recognises applications and innovations that will lead the way in the industry’s transition to sustainable fibres. Close race between the nominees – “The Straw Flexi-Dress” by DITF & VRETENA (Germany), cellulose textile fibre from unbleached straw pulp, is the winning cellulose fibre innovation 2024, followed by HONEXT (Spain) with the “HONEXT® Board FR-B (B-s1, d0)” from fibre waste from the paper industry, while TreeToTextile (Sweden) with their “New Generation of Bio-based and Resource-efficient Fibre” won third place.

Prior to the event, the conference advisory board had nominated six remarkable innovations for the award. The nominees were neck and neck, when the winners were elected in a live vote by the audience on the first day of the conference.

First place
DITF & VRETENA (Germany): The Straw Flexi-Dress – Design Meets Sustainability
The Flexi-Dress design was inspired by the natural golden colour and silky touch of HighPerCell® (HPC) filaments based on unbleached straw pulp. These cellulose filaments are produced using environmentally friendly spinning technology in a closed-loop production process. The design decisions focused on the emotional connection and attachment to the HPC material to create a local and circular fashion product. The Flexi-Dress is designed as a versatile knitted garment – from work to street – that can be worn as a dress, but can also be split into two pieces – used separately as a top and a straight skirt. The top can also be worn with the V-neck front or back. The HPC textile knit structure was considered important for comfort and emotional properties.

Second place
Honext Material (Spain): HONEXT® Board FR-B (B-s1, d0) – Flame-retardant Board made From Upcycled Fibre Waste From the Paper Industry
HONEXT® FR-B board (B-s1, d0) is a flame-retardant board made from 100 % upcycled industrial waste fibres from the paper industry. Thanks to innovations in biotechnology, paper sludge is upcycled – the previously “worthless” residue from paper making – to create a fully recyclable material, all without the use of resins. This lightweight and easy-to-handle board boasts high mechanical performance and stability, along with low thermal conductivity, making it perfect for various applications in all interior environments where fire safety is a priority. The material is non-toxic, with no added VOCs, ensuring safety for both people and the planet. A sustainable and healthy material for the built environment, it achieves Cradle-to-Cradle Certified GOLD, and Material Health CertificateTM Gold Level version 4.0 with a carbon-negative footprint. Additionally, the product is verified in the Product Environmental Footprint.

Third Place
TreeToTextile (Sweden): A New Generation of Bio-based and Resource-efficient Fibre
TreeToTextile has developed a unique, sustainable and resource efficient fibre that doesn’t exist on the market today. It has a natural dry feel similar to cotton and a semi-dull sheen and high drape like viscose. It is based on cellulose and has the potential to complement or replace cotton, viscose and polyester as a single fibre or in blends, depending on the application.
TreeToTextile Technology™ has a low demand for chemicals, energy and water. According to a third party verified LCA, the TreeToTextile fibre has a climate impact of 0.6 kg CO2 eq/kilo fibre. The fibre is made from bio-based and traceable resources and is biodegradable.

The next conference will be held on 12-13 March 2025.

At the "International Conference on Cellulose Fibers 2024" in Cologne, Germany, the Nova Institute for Ecology and Innovation awarded first place in the Innovation Prize to the project partners of the EU-funded HEREWEAR project. They presented a dress made of cellulose fibers, which is entirely made of straw pulp.

HEREWEAR is an EU-wide research project that brings together partners from research and industry. They are working to establish a European circular economy for locally produced textiles and clothing made from bio-based raw materials.
The HEREWEAR consortium consists of small and medium-sized enterprises and research institutions. HEREWEAR covers all the necessary expertise and infrastructure from academic and applied research and industry from nine EU countries.

The HEREWEAR approach includes technical and ecological innovations in the production of fibers, yarns, fabrics, knitwear and garments, as well as the use of regional value chains and the circular development of fashion items.

New technologies for wet and melt spinning of cellulose and bio-based polyesters, e.g. PLA, from which yarns and fabrics are produced, form the technical basis. Coating and dyeing processes have been developed and tested as part of the project. In addition to reducing the carbon footprint of the product, another environmental goal is to reduce the release of microfibers throughout the textile manufacturing process and life cycle.

Improving the sustainability and recyclability of the developed garments is ensured by design for circularity and digitally networked production means. On-demand production is realized in so-called "microfactories", which are individualized and produce only for actual demand. This production method can be achieved through regional, networked value chains and enables the traceability of materials and manufacturing processes.

The dress presented at the award ceremony is an example of the cooperation and the different qualifications of the project partners: TNO (Netherlands Organization for Applied Scientific Research) provided sustainably produced pulp. The HighPerCell fibers were produced in DITF's spinning facilities. At the same time, designers from the fashion label Vretena created the design for the flexible, two-piece dress, which can be knitted without cutting waste. DITF textile experts worked with the designers to develop the knitting pattern. DITF textile engineers and technicians produced the knitted fabric and assembled the dress at the institutes’ technical center. DITF computer scientists and engineers created the "value chain" and "digital twins" for digital traceability of the production processes.

The innovation prize was awarded to the HEREWEAR consortiu for their joint achievement. Representatives of DITF Denkendorf and Vretena accepted the award on behalf of the EU project partners.

The DITF is leading the joint project "DACCUS-Pre*". The basic idea of the project is to develop a new building material that stores carbon in the long term and removes more CO₂ from the atmosphere than is emitted during its production.       

In collaboration with the company TechnoCarbon Technologies, the project is now well advanced - a first demonstrator in the form of a house wall element has been realized. It consists of three materials: Natural stone, carbon fibers and biochar. Each component contributes in a different way to the negative CO₂ balance of the material:

Two slabs of natural stone form the exposed walls of the wall element. The mechanical processing of the material, i.e. sawing in stone cutting machines, produces significant quantities of stone dust. This is very reactive due to its large specific surface area. Silicate weathering of the rock dust permanently binds a large amount of CO₂ from the atmosphere.

Carbon fibers in the form of technical fabrics reinforce the side walls of the wall elements. They absorb tensile forces and are intended to stabilize the building material in the same way as reinforcing steel in concrete. The carbon fibers used are bio-based, produced from biomass. Lignin-based carbon fibers, which have long been technically optimized at DITF Denkendorf, are particularly suitable for this application: They are inexpensive due to low raw material costs and have a high carbon yield. In addition, unlike reinforcing steel, they are not susceptible to oxidation and therefore last much longer. Although carbon fibers are more energy-intensive to produce than steel, as used in reinforced concrete, only a small amount is needed for use in building materials. As a result, the energy and CO₂ balance is much better than for reinforced concrete. By using solar heat and biomass to produce the carbon fibers and the weathering of the stone dust, the CO₂ balance of the new building material is actually negative, making it possible to construct CO₂-negative buildings.

The third component of the new building material is biochar. This is used as a filler between the two rock slabs. The char acts as an effective insulating material. It is also a permanent source of CO₂ storage, which plays a significant role in the CO₂ balance of the entire wall element.

From a technical point of view, the already realized demonstrator, a wall element for structural engineering, is well developed. The natural stone used is a gabbro from India, which has a high-quality appearance and is suitable for high loads. This has been proven in load tests.  Bio-based carbon fibers serve as the top layer of the stone slabs. The biochar from Convoris GmbH is characterized by particularly good thermal insulation values.

The CO₂ balance of a house wall made of the new material has been calculated and compared with that of conventional reinforced concrete. This results in a difference in the CO₂ balance of 157 CO₂ equivalents per square meter of house wall. A significant saving!

* (Methods for removing atmospheric carbon dioxide (Carbon Dioxide Removal) by Direct Air Carbon Capture, Utilization and Sustainable Storage after Use (DACCUS).

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.

At the PERFORMANCE DAYS Functional Fabric Fair in Munich on 20 and 21 March 2024, CHT will present its latest sustainable textile technologies with a focus on dyeing and effect chemicals.

These products are used to finish textiles with special functions such as water repellency, breathability and efficient moisture transport. Significant amounts of water and energy can be saved during the dyeing and finishing process, resulting in a lower CO2 footprint.

In addition to effect chemicals, CHT will be presenting its dyeing products with a focus on the use of bio-based, biodegradable and recycled materials to support the circular economy.