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%.

International technology group ANDRITZ will be presenting its innovative nonwovens production solutions for wipe applications at the international World of Wipes (WOW) 2022 conference in Chicago, USA, from June 27 to 29, 2022.

ANDRITZ’s “We Care” sustainability program combines all ESG (Environment, Social, Governance) initiatives, goals, and achievements under one roof. For many years now, ANDRITZ has been offering various nonwoven processes to produce best and cost-effective wipes, for example spunlace, Wetlace and Wetlace CP. ANDRITZ also accompanies nonwovens producers in the move towards sustainability with the aim of reducing or eliminating plastic components while maintaining the high quality of the desired product properties. This applies to all types of sustainable wipes, such as flushable, biodegradable, bio-sourced, carded-pulp or standard carded wipes. Indeed, hydroentanglement has the advantage of being able to bond any kind of fibers without the use of chemical binders or thermal fusion.

The latest development in this field is the ANDRITZ neXline wetlace CP line, which integrates the card-pulp (CP) process. This is a fully engineered production line combining the benefits of drylaid and wetlaid technologies to produce a new generation of biodegradable wipes.

ANDRITZ has become a member of the board of the Responsible Flushing Alliance (RFA) in the USA. The RFA is an independent, non-profit trade association committed to educating consumers in responsible and smart flushing habits to help reduce damage to the nation's sewage systems. ANDRITZ is deeply involved in this topic with its technologies for 100% dispersible and biodegradable wet wipes and is highly committed to being part of the RFA.

Indian Tufropes is partnering with Truetzschler Nonwovens and Voith to install its unique pentamerous technology. The company’s first nonwovens production line will be capable to produce 5 different eco-friendly, hydroentangled products.

Truetzschler Nonwovens and Voith are thrilled to be the technology partner for Tufropes’ (patent pending) unique nonwoven line based on pentamerous technology. The new installation relies heavily on Truetzschler/Voith core components for wet-laying, carding and hydroentangling. Proprietary refinements will allow Tufropes to produce any possible hydroentangled nonwoven material, including bio-degradable, natural fibre, eco-friendly high-performance nonwovens. Globally this would be a first industrial-scale pentamerous technology-based nonwoven project. Based in Gujarat, India, the line is expected to be commissioned next year.

International technology Group ANDRITZ will be presenting its innovative nonwovens production and textile solutions at ANEX/SINCE 2021 in Shanghai, China, from July 22 to 24, 2021. The product portfolio covers state-of-the-art nonwovens and textile production technologies such as air-through bonding, needlepunch, spunlace, spunbond, wetlaid/Wetlace, converting, textile finishing, airlay, recycling, and bast fiber processing.

Among the largest end-use markets for nonwoven products are materials for durable uses. Interior linings for cars, materials for construction, geotextiles, synthetic leathers for clothing and furniture, carpeting, filtration and many other industries rely on the use of nonwovens produced using the needlepunch method.

ANDRITZ Nonwoven’s processes play a pioneering role in the production of biodegradable materials. For many years, ANDRITZ has offered different processes, like spunlace, Wetlace and Wetlace CP, all with one goal in mind: Elimination of plastic components while maintaining the high quality of the desired product properties. Such processes achieve high performance entirely with plastic-free raw materials. The added benefit of using a blend of fibers, like wood pulp, short-cut cellulosic fibers, viscose, cotton, hemp, bamboo or linen, without chemical additives results in a 100% sustainable fabric, thus meeting customers’ needs exactly as well as supporting the strong tendency to move away from plastics and synthetics.

The latest development in this field is the ANDRITZ neXline wetlace CP line. This process combines the benefits of two forming technologies (inline drylaid and wetlaid web forming process) with bonding by hydroentanglement. Natural fibers, like pulp or viscose, can be processed smoothly and generate a high-performance and cost-efficient wipe that is fully biodegradable and plastic-free.

• On October, 20th, 2020, the State Prize for Innovation was awarded to the Lenzing Group for their LENZING™ Web Technology.
• Lenzing thus received the highest award for particularly innovative achievements in Austria.

Lenzing – On Tuesday, October 20, 2020, the Lenzing Group was awarded the coveted “State Prize for Innovation”. Lenzing emerged as the winner with its project LENZING™ Web Technology and thus received the highest recognition for particularly innovative achievements in Austria. The novel process combines fiber and nonwovens production in only one step, setting new standards in terms of efficiency, circularity and ecological sustainability. Margarete Schramböck, Federal Minister for Digital and Economic Affairs, presented the award to Gert Kroner, Vice President Global Research & Development.

“This award is a great recognition of our work. Our goal is to grow continuously with sustainable innovations and to look beyond our fibers, to the needs of our customers and partners and to the needs of consumers worldwide. With the LENZING™ Web Technology we have created an exciting and promising solution for eco-friendly products in line with our corporate strategy sCore TEN and support consumers in their daily needs in a sustainable way”, says Stefan Doboczky, Chief Executive Officer of the Lenzing Group.

Biodegradable nonwovens for a clean environment

The pollution of the environment by plastics is one of the most urgent problems of our time. Every day, millions of hygiene products and wipes around the globe end up in garbage and sewage. Most of them consist of up to 80 percent polyester or other fossil, non-biodegradable materials and therefore pollute the environment. With the LENZING™ Web Technology, Lenzing has developed a patented technology to counter this problem: Sustainable and eco-friendly nonwovens are produced from the renewable raw material wood. These are not only plastic-free, they also score points for their particularly high environmental friendliness. “Thanks to a unique self-bonding mechanism, in which the filaments bond with each other during the spinning process, binders, which are found in many nonwovens, are no longer needed. As a result, the nonwovens produced with LENZING™ Web Technology are 100 percent biodegradable and do not pollute either humans or the environment”, says Gert Kroner, Vice President Global Research & Development of the Lenzing Group.

The Austrian State Prize for Innovation is awarded annually by the Federal Ministry for Digital and Economic Affairs to the most innovative Austrian company. In 2020, the competition took place for the 40th time.