From the Sector

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.

The Aachen-based start-up SA-Dynamics is developing sustainable, bio-based and biodegradable insulation materials made from aerogel fibres, thereby setting new standards in resource-saving construction. Dr Sascha Schriever (Institut für Textiltechnik ITA), Maximilian Mohr (ITA), Dr Jens Hofer (ITA Postdoc) and Dr Christian Schwotzer (Department for Industrial Furnaces and Heat Engineering IOB), who trained at RWTH Aachen University, were awarded first place in the KUER.NRW Business Plan Competition 2023 and prize money of €6,000.

SA-Dynamics relies on the impressive properties of aerogel fibres: they have excellent insulating properties, are lightweight, durable, robust, versatile and can be processed very well on conventional textile machines thanks to their flexibility. This makes them comparable to polystyrene, but still sustainable, as SA Dynamics uses bio-based and biodegradable raw materials.

"We can revolutionise the construction world with bio-based aerogel fibres," explains ITA founder Dr Sascha Schriever proudly. "If all insulation materials in construction are converted to bio-based aerogel fibres, all builders can realise their dream of a sustainable house."

SA Dynamics has come a good deal closer to its founding goal by winning the KUER.NRW 2023 business plan competition. The spin-off from Institut für Textiltechnik (ITA) and Department for Industrial Furnaces and Heat Engineering (IOB) at RWTH Aachen University is scheduled for spring 2025.

A lot of waste is generated in the trade fair and event industry. It makes sense to have furniture that can quickly be dismantled and stored to save space - or simply disposed of and recycled. Paper is the ideal raw material here: locally available and renewable. It also has an established recycling process. The German Institutes of Textile and Fiber Research (DITF) and their project partners have jointly developed a recycling-friendly modular system for trade fair furniture. The "PapierEvents" project was funded by the German Federal Environmental Foundation (DBU).

Once the paper has been brought into yarn form, it can be processed into a wide variety of basic elements using the structure winding process, creating a completely new design language.

The unusual look is created in the structure winding process. In this technology developed at the DITF, the yarn is deposited precisely on a rotating mandrel. This enables high process speeds and a high degree of automation. After the winding process, the individual yarns are fixed, creating a self-supporting component. A starch-based adhesive, which is also made from renewable and degradable raw materials, was used in the project for the fixation.

The recyclability of all the basic elements developed in the project was investigated and confirmed. For this purpose the research colleagues at the project partner from the Department of Paper Production and Mechanical Process Engineering at TU Darmstadt (PMV) used the CEPI method, a new standard test procedure from the Confederation of European Paper Industries.

Sensor and lighting functions were also implemented in a recycling-friendly manner. The paper sensor yarns are integrated into the components and detect contact.

Also, a modular system for trade fair and event furniture was developed. The furniture is lightweight and modular. For example, the total weight of the counter shown is well under ten kilograms and individual parts can easily be shipped in standard packages. All parts can be used several times, making them suitable for campaigns lasting several weeks.

A counter, a customer stopper in DIN A1 format and a pyramid-shaped stand were used as demonstrators. The research work of the DITF (textile technology) and PMV (paper processing) was supplemented by other partners: GarnTec GmbH developed the paper yarns used, the industrial designers from quintessence design provided important suggestions for the visual and functional design of the elements and connectors and the event agency Rödig GmbH evaluated the ideas and concepts in terms of usability in practical use.

ITMF (International Textile Manufacturer Federation) has published its International Textile Industry Statistics (ITIS) on productive capacity and raw materials consumption in the short-staple organized (spinning mill-) sector in virtually all textile-producing countries in the world.

The global number of installed short-staple spindles has grown from 225 million units in 2021 to 227 million units in 2022. The number of installed open-end rotors increased from 8.3 million in 2021 to 9.5 million in 2022. This constitutes the strongest growth ever recorded in this market with investment disproportionally targeting Asia. The number of installed air-jet spindles continued to increase in all regions in 2022.

The substitution between shuttle and shuttle-less looms continued in 2022. The number of installed shuttle-less looms increased from 1.72 million in 2021 to 1.85 in 2022 while installed shuttle looms reached 952 thousand. Total raw material consumption in the short-staple organized sector slightly decreased from 45,6 million tons in 2021 to 44,26 million tons in 2022. Consumption of raw cotton and synthetic short-staple fibers decreased by -2.5% and -0.7%, respectively. Consumption of cellulosic short-staple fibers increased by 2.5%.

CARBIOS, a pioneer in the development and industrialization of biological technologies to reinvent the life cycle of plastic and textiles, has received an initial payment of €1.2 million from the French Agency for Ecological Transition (ADEME) for the OPTI-ZYME research project, carried out in partnership with INRAE2, INSA3 and CNRS4 via the TWB5 joint service and TBI6 research units, a project co-funded by the French State as part of France 2030 operated by ADEME. With CARBIOS' aim to optimize and continuously improve its unique enzymatic PET depolymerization technology, the 4-year7 OPTI-ZYME project aims to investigate the scientific and technical levers for improving the competitiveness of the process, optimizing the necessary investments and reducing its environmental footprint.

This collaborative R&D program focuses on the technical and economic optimization of process stages, while preserving the quality of the monomers obtained. These optimizations, new developments and the exploration of innovative solutions should enhance the technology's flexibility with regards to incoming waste. Raw materials could come from different sources that are currently rarely or not recycled, notably food trays and textiles, or a mix of incoming materials. It also aims to limit input and water consumption, as well as regenerate or reduce co-products and ultimate residual waste. Finally, it seeks to support enzyme optimization to maximize the process’ economic profitability and competitiveness.

The project therefore aims to achieve an overall improvement in performance, combining efficiency, quality and environmental sustainability, to benefit the Longlaville plant which is currently under construction, and future licensed plants.

In May 2023, CARBIOS, the project leader and coordinator, announced that it had been awarded a total of €11.4M in funding by the French State as part of France 2030, operated by ADEME, including €8.2M directly for CARBIOS (€3.2M in grants and €5M in repayable advances) and €3.2M for its academic partners INRAE, INSA and CNRS (via the TWB mixed service and TBI research units). This funding, which is made up of grants and repayable advances, will be paid out in several instalments over the course of the project, including an initial instalment of 15%, equivalent to €1.2 million, received by CARBIOS on 5 December 2023. The first Monitoring Committee with ADEME for the first key stage of the project will be held in February 2024 to validate the granting of the second instalment of funding.

This project 2282D0513-A is funded by the French State as part of France 2030 operated by ADEME.

INDA’s World of Wipes® (WOW) International Conference is accepting abstracts on wipes products, markets, and technologies to be presented in Minneapolis, MN, June 17-20, 2024. The deadline for abstract submissions is January 12, 2024.

Experts in dry and wet nonwoven wipes, sustainability, end-use markets, substrate formation, raw materials and fibers, liquid ingredients, packaging, machinery, and market trends and data are encouraged to submit a brief abstract. The abstracts may be submitted via the WOW website.

Topics for consideration include:

• Dry and wet wipes
• Circular economy
• Sustainability / End-of-life implications
• Substrate formation
• Skin care formulations
• Raw materials
• Packaging
• Machinery and equipment
• Market trends and consumer insight
• Regulations
• Ecommerce / Retail channels

RUDOLF HUB1922 makes a move in response to the escalating demand for genuinely sustainable technologies, particularly from forward-thinking segments within the textile and apparel industry. In a showcase at Denim by Premiere Vision Milan, RUDOLF HUB1922 presents a pioneering range of textile chemistry that embodies true evolution.

This chemistry marks a milestone in addressing the pressing need for sustainable solutions. By harnessing raw materials derived from organic waste, plastic waste, and renewable feedstock, RUDOLF's latest textile innovations stand poised to transform the industry, promising a substantial reduction in its environmental footprint.

Alberto De Conti, Head of RUDOLF HUB1922, emphasizes the radical nature of evolutionary textile chemistry, stating, "RUDOLF's approach tackles the challenge of waste generation head-on by transforming waste materials into valuable resources". The diversion of waste and renewable feedstock away from landfills and incinerators to fuel textile chemical production is a game-changer, that diminishes the industry's reliance on non-renewable resources and endorses a circular economy model.

The successful integration of chemicals derived from organic and plastic waste, as well as renewable feedstocks, necessitates effective communication and education. Herein lies the significance of fostering collaborative efforts within the industry. De Conti underscores this point, stating, "Collaboration among scientists, fashion designers, and manufacturers is paramount. It propels a collective shift towards sustainable practices, making eco-friendly fashion the standard and minimizing the industry's environmental impact".

Successful SMCCreate 2023 Design Conference in Prague

With over 60 participants from Europe and the USA the second edition of the SMCCreate Design Conference took place from November 7th to 8th in Prague. The conference was jointly organized by the AVK – Federation of Reinforced Plastics and the European Alliance for SMC BMC, promoting the use of SMC and providing design tools to designers for applying these versatile materials.

During the SMCCreate 2023 conference topics covered the wide spectrum of the design with fiber composite/composite components in SMC and BMC technology, from conceptual design, development, and scale-up, with a special emphasis on recycling and sustainability solutions. 18 speakers from various European countries showed how they address important market trends and changing customer needs, and which solutions their companies offered in terms of materials, performance and much more.

As an introduction, speakers - including CTC/Airbus and Teijin - presented different possible applications for SMC and BMC components, including aircraft interiors, bicycle boxes, and applications in e-mobility. The topic of sustainability was broadly covered, highlighting recycling solutions and experiences (Siemens, IDI, OC, AOC), the use of renewable raw materials, as well new LCA models developed by the SMC BMC Alliance (LCS),

Specifically for designers, the use of the SMC flow and curing modelling was presented (ESI, OC), SMC positioning vs. aluminium (Spartners). The second day concluded with contributions on process optimization options for component production, including speeches by Dieffenbacher, Netzsch and EBG.

The appetite for responsible sourcing shows no sign of slowing with Europe's fastest-growing platform, Source Fashion expanding again for its next edition with a 50% increase in exhibitors to over 320 from around the world.

The gateway to the UK fashion industry, Source Fashion takes place on 18th - 20th February at Kensington Olympia London putting international manufacturers and suppliers at the fingertips of UK brands.

Source Fashion offers a unique experience for decision-makers in buying, sourcing and procurement, with the reassurance of knowing that every exhibitor has been audited to ensure sustainability and transparency remains at the heart of their business model. The next show unites manufacturers from the UK, India, Portugal, Turkey Madagascar, China, Sri Lanka, Nepal, Peru, Philippines, Ethiopia and many more. The show will also see the debut of manufacturers from Mongolia, Lithuania, and Tunisia.

Suzanne Ellingham, Director of Sourcing of Source Fashion says; "Visitors will love the quality, diversity and variety of producers, makers and manufacturers from around the world with the best of the best in terms of high-quality knitted apparel, luxury wool knits, leather, denim, and more across our sectors including Fabrics, Accessories, Sportswear, Garment Manufacturers, Packaging, Yarns, Trims and Fixtures, plus Design & Technology."

Connecting global manufacturers and suppliers to buyers who want the security in knowing every conversation is one that could lead to a new range creation, Source Fashion is the gateway to retail for manufacturers and suppliers from across the world. From raw materials, fabrics, trims, and packaging, all the way through to contract manufacturers offering in house design services, the show brings the inspiration and tools together in one exciting destination to bring new ranges to life.

The July 2023 show welcomed some of retail's biggest names. Buyers, sourcing managers, product developers, technologists, and designers from brands and retailers including John Lewis, Mountain Warehouse, Fila, Selfridges, H&M, Lipsy, Lyle & Scott, Joules, FILA, Perry Ellis, JoJo Mamman Bebe, Monsoon, Fatface, Lulu Guinness, Next, Sainsburys, Vivienne Westwood, Stitch Fix, ASOS, Bella Freud, Burberry, Fat Face, Hackett, Harrods, NBrown, Monsoon and many more came to explore and source from Source Fashion's diverse mix of audited exhibitors.

With a content stage dedicated to presenting and discussing the latest trends, innovations, and topics in responsible and sustainable manufacturing from internationally renowned industry professionals, as well the inspirational Source Catwalk shows, Source Fashion is the must-attend event for the fashion community.

Freudenberg Performance Materials (Freudenberg) is extending its recently-introduced ECO range of sustainable nonwoven carpet backings: Lutradur ECO-R and Colback ECO-R backings contain high percentages of recycled raw materials. With its ECO portfolio Freudenberg supports carpet manufacturers in their transition towards an increasingly sustainable product offering.

The company launched its ECO range for sustainable primary backings earlier this year with the introduction of the ECO-RE resource-efficient backings that use less raw materials and support end product recyclability. To achieve this, Freudenberg R&D teams further developed the company’s proprietary yarn production technology allowing for extremely thin filaments.

ECO-R products
Freudenberg’s spunbond nonwoven primary and secondary carpet backings contribute to manufacturers’ easy and efficient production processes as well as to high-performance end products. The company is now extending its ECO range in Europe with Colback ECO-R and Lutradur ECO-R backings that contain a recycled content of between 51 and 90%. Replacing virgin raw materials with recycled polyester saves on natural resources and improves the carbon footprint of end products. The ECO-R backings are specifically suitable for carpet tiles, broadloom, dust control mats and automotive option mats.