From the Sector

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.

Many end-users now expect recycled materials to be in textile products they purchase – and this is driving innovation throughout the industry. However, there are still many technical and economic issues facing yarn and fabric producers using recycled resources. Members of the Swiss Textile Machinery Association offer some effective solutions to these challenges.

Synthetic recycled materials such as PET can usually be treated similarly to new yarn, but there are additional complexities where natural fibres like wool and cotton are involved. Today, there’s a trend towards mechanically recycled wool and cotton fibres.

Spinning recycled cotton
The use of mechanically recycled fibres in spinning brings specific quality considerations: they have higher levels of short fibres and neps – and may often be colored, particularly if post-consumer material is used. It’s also true that recycled yarns have limitations in terms of fineness. The Uster Statistics 2023 edition features an extended range of fibre data, supporting sustainability goals, including benchmarks for blends of virgin and recycled cotton.
In general, short fibres such as those in recycled material can easily be handled by rotor spinning machines. For ring spinning, the shorter the fibres, the more difficult it is to guide them through the drafting zone to integrate them into the yarn body. Still, for wider yarn counts and higher yarn quality, the focus is now shifting to ring spinning. The presence of short fibres is a challenge, but Rieter offers solutions to address this issue.

Knitting recycled wool
For recycling, wool fibres undergo mechanical procedures such as shredding, cutting, and re-spinning, influencing the quality and characteristics of the resulting yarn. These operations remove the natural scales and variations in fibre length of the wool, causing a decrease in the overall strength and durability of the recycled yarn. This makes the yarn more prone to breakage, especially under the tension exerted during knitting.

Adapting to process recycled materials often requires adjustments to existing machinery. Knitting machines must be equipped with positive yarn suppliers to control fibre tension. Steiger engages in continuous testing of new yarns on the market, to check their suitability for processing on knitting machines. For satisfactory quality, the challenges intensify, with natural yarns requiring careful consideration and adaptation in the knitting processes.

From fibres to nonwovens
Nonwovens technology was born partly from the idea of recycling to reduce manufacturing costs and to process textile waste and previously unusable materials into fabric structures. Nonwovens production lines, where fibre webs are bonded mechanically, thermally or chemically, can easily process almost all mechanically and chemically recycled fibres.

Autefa Solutions offers nonwovens lines from a single source, enabling products such as liners, wipes, wadding and insulation to be produced in a true closed loop. Fibres are often used up to four times for one product.

Recycling: total strategy
Great services, technology and machines from members of Swiss Textile Machinery support the efforts of the circular economy to process recycled fibres. The machines incorporate the know-how of several decades, with the innovative power and quality standards in production and materials.
Stäubli’s global ESG (environmental, social & governance) strategy defines KPIs in the context of energy consumption, machine longevity and the recycling capacity in production units worldwide, as well in terms of machinery recyclability. The machine recyclability of automatic drawing in machines, weaving systems and jacquard machines ranges from 96 to 99%.

“From Earth to Earth”: The new plan defines goals and concrete actions in Environmental, Social and Governance (ESG) areas to foster value creation for all stakeholders and put new sustainability regulatory requirements at the centre of attention.

A project, designed to enhance RadiciGroup's transparency and commitment to develop a responsible business along its entire value chain from an economic, social and environmental perspective and focus on the ever more widespread and stringent sustainability regulatory requirements. These are the features and goals of the Sustainability Plan presented by the Group and called "From Earth to Earth", precisely to emphasize the intent to focus on the Earth and future generations.

In the context of a complex and constantly changing scenario, the Group has therefore decided to capitalize on the goals achieved and look beyond them with a plan defining the medium-term targets and the actions to be taken to fulfil them and covering all areas considered to be "material”, i.e., relevant from the point of view of ESG and financial risks, opportunities and impacts. Indeed, the ultimate goal of "From Earth to Earth" is to support business continuity and the growth of the company and all its stakeholders.

The project was the result of a multi-year collaboration with Deloitte, which contributed an external and objective viewpoint on the definition of the material targets and themes. However, it was not an armchair exercise, but the result of an extensive listening process involving internal and external stakeholders, all of whom were sustainability experts who helped define a shortlist of strategic themes for both the Group and its main stakeholders. These issues were then analysed in detail using working tables on the different themes to identify the objectives in Environmental, Social and Governance areas and the related concrete actions needed to achieve them, in line with the European decarbonization and energy transition policies and the
United Nations Sustainable Development Goals, a global blueprint for sustainable growth.

In particular, RadiciGroup’s environmental goals include: a 20% increase and differentiation in renewable source electricity consumption, an 80% reduction in total direct greenhouse gas emissions by 2030 compared to 2011, attention to water consumption to limit the impact on local communities and biodiversity, the extension of Life Cycle Assessment (LCA) methodology to measure the environmental impact of 70% of the products (in terms of weight) manufactured by the entire Group, collaboration among the various actors in the supply chain from an ecodesign perspective and the search for increasingly more sustainable and circular packaging solutions.

Archroma is showcasing its planet conscious innovations and solution systems at this year’s Colombiatex de Las Américas, being held from January 23 to 25, 2024.

Archroma is using its attendance at Colombiatex 2024 to introduce a new concept that promises to help the region’s brands and mills optimize their productivity, add value to their products and create a positive impact on the environment: Super Systems+.

The Super Systems+ solutions offer great performance, including end-product durability, while meeting sustainability targets with cleaner chemistries that comply with current and anticipated industry regulations or deliver resource savings, or both. Solutions are currently available for popular end-use segments, from denim to cotton and poly-cotton knits.

For black denim with a cleaner environmental footprint, brands and mills can choose DIRESUL® EVOLUTION BLACK to create unique shade and wash-down effects with an overall impact reduction of 57% compared to standard Sulfur Black 1 liquid.* For authentic blue denim, Archroma’s aniline-free** pre-reduced DENISOL® PURE INDIGO 30 LIQ produces coveted indigo colors with the same performance and efficiency as conventional indigo dye, but in a more planet-friendly way.

To embrace circularity and create natural shades on cellulosic-based fibers including cotton, kapok, linen and viscose, brand owners can now turn to Archroma’s patented EarthColors® technology. It makes high-performance biosynthetic dyes from non-edible natural waste, such as almond shells, bitter orange residues and cotton production byproducts, helping conserve natural resources. For next-generation processing of polyester and its blends, Archroma’s ERIOPON® E3-SAVE all-in-one auxiliary combines pre-scouring, dyeing and reduction clearing in a single bath to achieve substantial savings of water, energy and time.

For weather protection and stain resistance that is both economically and environmentally sustainable, Archroma Super Systems+ draw on an extensive portfolio of fluorine-free durable water repellents.

* Ecotarrae lifecycle analysis
** Below limits of detection according to industry standard test methods

The Tuscan tannery Vesta Corporation has presented to its stakeholders a report outlining its current commitment and future objectives, with a view to innovating, safeguarding and fostering high-end leather material processing.

Ever since it was founded in 1966 in Ponte a Egola, the Tuscan hub for the production of leather for vegetable tanned soles, Vesta has been a supplier and partner of haute couture and sportswear brands, from lightweight calf and half-calf leather, to heavy leathers made with hind and rump hide, for leatherware and shoes.

To draft this Report, reference was made to the “Global Reporting Initiative Sustainability Reporting Standards” established by the Global Reporting Initiative (GRI). The information in the balance sheet refers to the year 2022 (from 1 January to 31December 2022). Wherever possible, data for the previous year are included, to allow for a comparison of data over time and to assess the trend of Vesta activities. Sustainability is an objective-driven process. This means that comparing data allows for concretely measuring the company’s progress, as it pursues this accounting process year after year.

The improvement actions already implemented by Vesta involve corporate responsibility from an environmental, social and governance perspective. An example are the improved heating and processing plants (which entails the construction of a new tumbling department based on 4.0 technology). This guarantees significant energy, water and economic savings. Along with numerous corporate certifications, the company has passed the Raw Material Traceability test with a score of EXCELLENT, as well as the Carbon and Water footprint analysis.

As confirmation of its commitment to improving corporate performance levels, Vesta has been upgraded from BRONZE (2020) to GOLD in 2023, as assessed by the Leather Working Group (which measures leather manufacturers’ environmental performance for ecological production and for a systemic management of quality, environmental, safety and ethical factors).

Becoming energy-independent is a major step in the pipeline, involving the installation of a photovoltaic plant. This is complemented by the implementation of a project aimed at totally compensating its CO2 emissions for the year subject to accounting and certification. This neutrality will be achieved through the acquisition of credits deriving from projects certified by the United Nations. For example, with the construction of an important hydro-electric plant to which Vesta is contributing. With regard to production, corporate research is currently focused on developing solutions to reduce water and energy use. It is also implementing circular trends by adopting an increasing number of bio-based products, to guarantee the most sustainable end-of-life and waste management for its products.

SGL Carbon relies on climate-friendly manufacturing processes in the production of its own carbon fibers. By using renewable energy, the carbon footprint of SGL fiber can be reduced by up to 50% compared to a conventional fiber.  

SGL carbon fiber is produced at the Lavradio (Portugal) and Moses Lake (USA) sites. When the Moses Lake site was selected in the 1990s, the use of hydropower as an energy source played a particularly decisive role. As a result, around 75,000 tonnes of CO₂ can be saved in Moses Lake by purchasing electricity from hydropower plants compared to a fossil fuel-based electricity mix.

As part of the consistent implementation of its climate strategy, SGL Carbon will be using a CO₂-neutral biomass system to generate energy from the beginning of 2024, which will make the production system, which was previously based on natural gas, more flexible and climate-friendly. At full capacity, the biomass system in Lavradio can save more than 90,000 tons of CO₂.

The raw material used is wood pellets, which are sourced from a radius of 250 kilometres via short transport routes.

The climate-friendly energy supply at the site in Moses Lake (USA) combined with the new biomass plant in Lavradio (Portugal) lead to a reduction in CO₂ emissions of up to 50% in the production of SGL's own carbon fibers compared to conventional fibers. With the investment in the biomass system, SGL Carbon is pursuing its climate strategy. The target is to save 50% CO₂ emissions by the end of 2025 compared to the base year 2019 and to be climate-neutral by the end of 2038. In the period 2019 to 2022, SGL Carbon has reduced its CO₂ emissions by 17%.

Researchers at the ITA, the University of Bonn and Heimbach GmbH have developed a new method for removing oil spills from water surfaces in an energy-saving, cost-effective way and without the use of toxic substances. The method is made possible by a technical textile that is integrated into a floating container. A single small device can remove up to 4 liters of diesel within an hour. This corresponds to about 100 m2 of oil film on a water surface.
 
Despite the steady expansion of renewable energies, global oil production, oil consumption and the risk of oil pollution have increased steadily over the last two decades. In 2022, global oil production amounted to 4.4 billion tons! Accidents often occur during the extraction, transportation and use of oil, resulting in serious and sometimes irreversible environmental pollution and harm to humans.

There are various methods for removing this oil pollution from water surfaces. However, all methods have various shortcomings that make them difficult to use and, in particular, limit the removal of oil from inland waters.

For many technical applications, unexpected solutions come from the field of biology. Millions of years of evolution led to optimized surfaces of living organisms for their interaction with the environment. Solutions - often rather unfamiliar to materials scientists and difficult to accept. The long-time routine examination of around 20,000 different species showed that there is an almost infinite variety of structures and functionalities. Some species in particular stand out for their excellent oil adsorption properties. It was shown that, e.g., leaves of the floating fern Salvinia molesta, adsorb oil, separate it from water surfaces and transport it on their surfaces (Figure 1, see also the video of the phenomon.).

The observations inspired them to transfer the effect to technical textiles for separating oil and water. The result is a superhydrophobic spacer fabric that can be produced industrially and is therefore easily scalable.

The bio-inspired textile can be integrated into a device for oil-water separation. This entire device is called a Bionic Oil Adsorber (BOA). Figure 2: Cross-section of computer-aided (CAD) model of the Bionic Oil Adsorber. The scheme shows an oil film (red) on a water surface (light blue). In the floating cotainer(gray), the textile (orange) is fixed so that it is in contact with the oil film and the end protrudes into the container. The oil is adsorbed and transported by the BOA textile. As shown in the cross-section, it enters the contain-er, where it is released again and accumulates at the bottom of the container. See also the video regarding the oil absorption on the textile, source ITA).
 
Starting from the contamination in the form of an oil film on the water surface, the separation and collection process works according to the following steps:

• The BOA is introduced into the oil film.
• The oil is adsorbed by the textile and separated from the water at the same time.
• The oil is transported through the textile into the collection container.
• The oil drips from the textile into the collection container.
• The oil is collected until the container is emptied.

The advantage of this novel oil separation device is that no additional energy has to be applied to operate the BOA. The oil is separated from the surrounding water by the surface properties of the textile and transported through the textile driven solely by capillary forces, even against gravity. When it reaches the end of the textile in the collection container, the oil desorbs without any further external influence due to gravitational forces. With the current scale approximately 4 L of diesel can be separated from water by one device of the Bionic Oil Adsorber per hour.

• It seems unlikely that a functionalized knitted spacer textile is cheaper than a conventional nonwoven, like it is commonly used for oil sorbents. However, since it is a functional material, the costs must be related to the amount of oil removed. In this respect, if we compare the sales price of the BOA textile with the sales prices of various oil-binding nonwovens, the former is 5 to 13 times cheaper with 10 ct/L oil removed.
  Overall, the BOA device offers a cost-effective and sustainable method of oil-water separation in contrast to conventional cleaning methods due to the following advantages:
• No additional energy requirements, such as with oil skimmers, are necessary
• No toxic substances are introduced into the water body, such as with oil dispersants
• The textiles and equipment can be reused multiple times
• No waste remains inside the water body
• Inexpensive in terms of the amount of oil removed.
• The team of researchers from the ITA, the University of Bonn and Heimbach GmbH was able to prove that the novel biomimetic BOA technology is surprisingly efficient and sustainable for a self-controlled separation and automatic collection of oil films including their complete removal from the water. BOA can be asapted for open water application but also for the use in inland waters. Furthermore, it is promising, that the textile can be used in various related separation processes. The product is currently being further developed so that it can be launched on the market in 2-3 years.

Autoneum’s sustainable, textile and lightweight Propylat technology reduces both interior and exterior noise of vehicles. Propylat was originally developed by Borgers Automotive, which was acquired by Autoneum in April 2023. The versatile technology is characterized by a flexible material composition of natural and synthetic fibers with a high recycled content and contributes to significant waste reduction thanks to its complete vertical integration. In addition, the fully recyclable technology variant Propylat PET is now part of the sustainability label Autoneum Pure.

The ongoing electrification of mobility as well as increasingly strict regulatory requirements for vehicle performance in terms of sustainability and acoustics are presenting new challenges to car manufacturers worldwide. With Propylat, Autoneum now offers another lightweight, fiber-based and versatile technology whose sound-insulating and -absorbing properties as well as high content of recycled materials help customers address these challenges. Propylat-based products not only contribute to reducing pass-by noise and improving driver comfort, but they are also up to 50 percent lighter than equivalent plastic alternatives; this results in a lower vehicle weight and, consequently, less fuel and energy consumption as well as lower CO2 emissions.

Autoneum's innovative Propylat technology consists of a mixture of recycled synthetic and natural fibers – the latter include cotton, jute, flax or hemp, for example – that are consolidated using thermoplastic binding fibers without adding any further chemical binders. Thanks to the flexible fiber composition and the variable density and thickness of the porous material, the properties of the respective Propylat variant, for example with regards to acoustic performance, can be tailored to individual customer requirements. This allows for a versatile application of the technology in a variety of interior and exterior components such as wheelhouse outer liners, trunk trim, underbody systems and carpets. For instance, Propylat-based wheelhouse outer liners significantly reduce rolling noise both inside and outside the vehicle while at the same time offering optimum protection against stone chipping and spray water.

In terms of sustainability, Propylat always contains a high proportion of recycled fibers – up to 100% in some variants – and can be manufactured with zero waste. Thanks to the full vertical integration of Propylat and Autoneum’s extensive expertise in recycling processes, the technology also contributes to a further significant reduction in production waste. Moreover, the Propylat PET technology variant, which consists of 100% PET, of which up to 70% are recycled fibers, is fully recyclable at the end of product life. For this reason, Propylat PET has been selected for Autoneum Pure – the Company’s sustainability label for technologies with excellent environmental performance throughout the product life cycle – where it will replace the current Mono-Liner technology going forward.

Propylat-based components are currently available in Europe, North America and China.

The data and the information reported examine the performance relative to the companies Marchi & Fildi S.p.A. and Filidea S.r.l. during the year 1st January 2022 to 31st December 2022. In addition, with the aim of putting the data into a context of developments, a comparison with data pertaining to 2021 was also made.

Amongst the numerous data and insights provided by the analyses given in the Report, some relevant performance factors relating to environmental achievements emerge.

With reference to Marchi & Fildi, and in comparison to 2021, the year 2022 demonstrated:

• A unit reduction in water consumption of 57% and unit reduction of waste water of 19%
• A unit reduction in electric power consumption of 13%

An overall reduction in CO2 emissions (Scope I + Scope II) of 22% In the same period, for Filidea the following results are shown:

• A unit reduction in water consumption of 26%, unit waste water of 22%
• A reduction in unit natural gas consumption of 7%
• A reduction in unit electric power consumption of 14%
• An overall reduction in CO2 emissions (Scope I + Scope II) of 7%

These data offer quantitative feedback on the constant commitment to the optimisation of resources and use of production technologies with low energy impact, which the Group has adopted for years.

Massimo Marchi, Marchi & Fildi’s President, has this to say about the choice to invest in this form of reporting:
“The decision to write a Sustainability Report represents for us one of the elements which guide us towards the constant improvement of company performance with reference to ESG. This is one of the stages towards the formalisation of a strategic plan for the management of sustainability, a journey which the Group has been committed to for years and in which we believe 100%.”

The Lenzing Group has concluded a supply contract with the Austrian electricity producer WLK energy for the purchase of around 13 megawatts of wind power. Lenzing is thus not only underlining its commitment to climate protection and the energy transition, but is also making a long-term investment in a price-stable and diversified electricity supply. The contract has a term of 15 years and provides for supply from the new wind farm in Engelhartstetten from the first quarter of 2025.

The construction of the wind farm is a joint project involving several partners, including the operator and electricity supplier WLK energy, based in Untersiebenbrunn (Lower Austria). The total output of the wind farm with a total of eleven wind turbines will be around 45 megawatts. The share of around 13 megawatts, which will be produced exclusively for the needs of the Lenzing site (Upper Austria), corresponds to the average electricity requirements of around 10,000 households per year in Austria. The ground-breaking ceremony to mark the start of construction took place on November 09, 2023 with representatives from politics and business.

In 2019, Lenzing was the first fiber manufacturer to set itself the goal of reducing its CO2 emissions by 50 percent by 2030 and becoming carbon-neutral by 2050. This CO2 reduction target was recognized by the Science Based Targets Initiative. In 2022, Lenzing opened Upper Austria's largest open-space photovoltaic plant together with Verbund and also signed an electricity supply contract for photovoltaic energy with the green electricity producer Enery and Energie Steiermark.