From the Sector

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%.

The Südwolle collection of yarns for weaving and circular knitting continues its evolutionary path based on the key concept of Responsibility. This principle guides Südwolle Group's commitment and engagement regarding all areas of business and stakeholders - the environment, the textile industry production chain, consumers, employees and the social repercussions of its business.

The intersection between these 6 areas has resulted in a collection in which the concept of seasonality is blurred, and products have a flexible, versatile use. The use of cutting-edge technology means yarns offer a high level of quality, suitable for apparel with outstanding durability, a factor that helps to reduce the environmental impact of textile waste and disposable fashion.

Overview of the collection
The collection is divided into 4 themes.
Natural, biodegradable or recycled fibre blends intended for crepe and crinkled fabrics are characterized by substantial twist and a high level of performance. The selection of fibres is oriented towards sustainability, with wool and silk organze combined with LENZINGTM ECOVEROTM viscose and Q-NOVA® regenerated polyamide.

Fuji crepe X-compact Nm 40/1 Z 1050 (40% wool 21.2 μ, 60% FSC certified LENZINGTM viscose EV), new this season, features a smooth look and no pilling thanks to the use of X-compact spinning technology, which produces yarns with excellent performance and durability.

When it comes to light, natural blends, wool and linen or wool, linen and silk blends follow the trend for softly fluid structures, such as the new Peschici Nm 42/1 Z 600 (53% wool 18.4 μ, 23% linen, 24% silk), with a fresh, dry handle and very current dappled effect, which results from the skilful combination of different fibres.

Contributing to a more sustainable and traceable textile production also involves attention to all fibres used. Mohair used for luxury yarns in noble fibres is strictly RMS (Responsible Mohair Standard) certified, which traces its origin, guaranteeing animal welfare and production according to responsible standards, similar to the analogous RWS (Responsible Wool Standard) used for wool. Bosforo RWS RMS Nm 32/1 Z 950 (20% wool 20.8 μ RWS, 60% FSC certified LENZINGTM viscose EV, 20% RMS Kid Mohair) is a fresh, bright yarn that is soft on the skin, suitable for trans-seasonal products, an example of careful selection of raw materials.

Among the fancy yarns, delicately animated structures predominate for naturally elegant creations, represented by Niche Nm 34/2 S 460 (42% wool 21.2 μ, 58% bourette silk), a twisted yarn in wool and bourette silk, which adds dynamism with its characteristic rough, knotty surface.

• Sustainability Report 2021 combines financial and non-financial performance indicators
• 2011-2021: 60% reduction in greenhouse gas emissions per metric ton produced. 51.7% renewable source energy achieved
• ESG criteria (environmental impact (E), social values (S), organizational governance (G)) determine sustainability strategy

The new RadiciGroup Sustainability Report has been published. With the goal of continuous improvement, the 2021 report has a broader reporting boundary compared to prior years and takes into consideration all the Group companies, including sales and service companies. Over 30 sites located across Asia, North America, South America and Europe have provided their 2021 data on economic, social and environmental performance.

Not only indicators of a financial nature but also measures of environmental impact (E), social values (S) and good organizational governance (G): the latter so-called ESG criteria have become a priority for RadiciGroup, which is preparing for the new European Union non-financial reporting directive in order to contribute to the transition towards a fully sustainable economic system and increase the value of its companies.

On the environmental front, the themes of climate change and decarbonization are RadiciGroup priorities and part of a policy aimed at the uncoupling of growth and resource usage. The Group undertakes to lower emissions from production and choose limited-impact energy sources. This commitment is confirmed by the numbers: in the 2011-2021 period, total emissions per metric ton produced were reduced by 60%, while renewable source energy used by the Group reached 51.7%. Specific investments to decrease environmental impact are ongoing: in 2021, EUR 3.1 million were allocated to introduce best available techniques and improve emissions abatement and energy efficiency.

RadiciGroup promotes professional growth by valuing competence and investment in training: Group training hours once again rose after the pandemic period from 36,000 hours in 2020 to 46,000 hours in 2021. The training method was often a hybrid, taking advantage of aspects experimented with during the pandemic, that is, less traveling and use of facilities in favour of higher groupwide attendance, without the need for participation limits. Fifty-five percent of total training hours was dedicated to health and safety, which has yielded positive results based on the related indicators.

Angelo Radici, president of RadiciGroup: “Today, the United Nations 2030 Agenda for Sustainable Development is our main guideline on sustainability issues. It shows us an ambitious scenario and urges us to confront a multitude of challenges that affect our enterprise from every point of view. We try to be quick to react and tenacious, staying faithful to our roots and our style, but expanding our perspective to become increasingly more competitive and proactive in the businesses we are engaged in. From the viewpoint of achieving less environmental impact in the future, we propose to be an enabler and facilitator for our stakeholders on themes such as the circular economy, where we see ourselves as protagonists in ecodesign and recycling, as well as innovation, which we put at the service of anyone who is processing and using our products, so as to offer real sustainability solutions together.”

• Results of experiments conducted by the University of California’s prestigious Scripps Institution of Oceanography in San Diego provide further scientific proof that LENZING™ fibers offer an effective substitute to synthetic fibers that are part of the pressing problem of plastic pollution in our oceans.

Lenzing/San Diego – The Lenzing Group, a world-leading provider of wood-based specialty fibers, has received further scientific proof of the biodegradability of its fibers. In a study published in October 2021 , scientists from the prestigious academic research institute Scripps Institution of Oceanography (SIO) at the University of California, San Diego confirmed that wood-based cellulosic fibers biodegrade in the ocean within a short period of time at the end of their life cycle, making them a better alternative to fossil-based fibers. The research was the result of an independent project trying to understand the “end-of-life” scenarios for textiles and nonwovens discarded in the environment.

SIO has a global reputation for being one of the oldest, largest and most important marine research centers worldwide. In this study, SIO compared the degradation processes of nonwovens made from fossil-based synthetic materials such as polyester with those of cellulosic materials such as Lenzing’s wood-based lyocell, modal and viscose fibers in specific scenarios – under various real oceanic conditions and controlled aquaria conditions. The results of these experiments are striking: while wood-based cellulosic fibers fully biodegraded within 30 days, the fossil-based fibers tested were practically unchanged after more than 200 days.

The biodegradability of LENZING™ fibers was also tested in the laboratory of Organic Waste Systems (OWS) in Belgium – one of the world's leading companies in biodegradability and compostability testing – which showed data confirmed by those found with the real-life measurements at Scripps. The OWS assessment was conducted in accordance with applicable international standards and reflects relevant natural and artificial conditions in which biodegradation can occur. Certificates from the certification organization TÜV Austria show that LENZING™ fibers rapidly biodegrade in all test environments (soil, industrial composting, home composting, fresh water and marine water) within the time frames set by the applicable standards.

Lenzing also welcomes the EU’s targeted measures to combat plastic waste in general, such as those relating to the single-use plastic directive (EU) 2019/9043. In its recently adopted guidelines for implementing the directive, the EU Commission stipulates the specific products that fall under this category, which is a well-needed effort to provide clarity to the EU member states for their joint campaign against environmental pollution from plastic waste. Lenzing’s wood-based, biodegradable cellulosic fibers can be part of a sustainable and innovative solution to this man-made problem that will continue to grow. As of July 2021, the single-use plastic directive sets out standardized labelling requirements for certain products, either on packaging or on the products themselves, which include plastic-based feminine hygiene products and wet wipes for body care or household use. This is a start to tackle the problem: educate the consumer and offer alternative materials with better circularity.

ISKO, a global, leading premium denim ingredient brand, announced its participation in The Jeans Redesign – a project, established by the Ellen MacArthur Foundation’s Make Fashion Circular initiative, to encourage and guide the denim industry to transform the way jeans are made and move towards a circular economy for fashion.

ISKO meets the requirements for participation set by The Jeans Redesign guidelines and has made a commitment that 85% of its entire fabric production will consist of recycled material content made from pre-consumer and post-consumer recycled materials. This production will be independently verified by Textile Exchange audit bodies.

This achievement is made possible using ISKO’s R-TWO™ technology which is created through a patented and exclusive yarn spinning technique that retains the unique properties and benefits found in ISKO’s statement fabrics. ISKO’s R-TWO™ is the embodiment of its Responsible Innovation™ mindset and aligns with the principles of a circular economy espoused by the Ellen MacArthur Foundation – to ensure durability, material health, recyclability and traceability. R-TWO™ positions ISKO as a sustainability leader and enables it to exceed the project guidelines to create denim that is designed to be used more, made to be made again and made from safe and recycled or renewable inputs.