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.

INDA, the Association of the Nonwoven Fabrics Industry, is partnering with the Waterloo Filtration Institute to deliver the FiltXPO™ technical program on October 10-11, 2023 in Chicago, Illinois. The Waterloo Filtration Institute was instrumental in recommending program topics and world-class presenters.

Engineers, scientists, and industry professionals will gain the latest insights into the filtration and separation topics affecting the industry today and into the future. The program features presentations include: filter media technologies, advancements and opportunities in filtration machinery and equipment, innovations in clean air for homes and urban areas, standards and testing, industry trends and new developments, and filtration challenges and opportunities.

The keynote for this year’s event is “IAQ Is the New Black” presented by Suzanne Shelton, President & CEO, Shelton Group. Shelton will share the latest data around consumer views on health, safety, people, and the planet. Participants will gain an understanding of the filtration opportunities and the challenges manufacturers face in communicating the value of their products.

A preview of the subject matter experts includes:

• AAF Flanders – “Air Filter Standards Activity and What It Means for Innovation”
• Ahlstrom – “Expanding Wetlaid Filtration Media Performance Through Innovation”
• Air Techniques International – “Application of Automated Filter Tester in Quality Control Testing: Importance of Consistent Aerosol Particle Size Distribution”
• American Truetzschler, Inc. – “How Really Good Filter Media Is Made”
• CEREX Advanced Fabrics – “The Antimicrobial Nylon Advantage”
• Elsner Engineering Works, Inc. – “When Does Automation Make Sense”
• Hollingsworth & Vose – “Accelerating Membrane Adoption with ROI”
• INDA – “Beyond Porter’s Five Forces – When Regulation Reshapes Markets”
• MANN+HUMMEL GmbH – “Filtration for Cleaner Urban Mobility – Introducing Horizon Europe Innovation Action Aersolfd”
• NatureWorks – “Optimizing Biopolymers to Improve Filter Performance – A Spectrum of Approaches and Opportunities”
• Palas GmbH – “Influence of Temperature and Humidity to Filter Efficiency and Dust Holding Capacity”
• Ptak Consulting – “Residential Filtration – Performance Against Infectious Aerosols”
• The University of Georgia – “Recent Advances in Melt Blown Nonwovens and Filter Media Research”

New this year to FiltXPO are Lightning Talks. Lightning Talks are an opportunity to connect with new trends, products, innovations, and ideas with speakers rotating every eight minutes. Presenting companies include Ahlstrom, Elsner Engineering Works, Inc., Gottlieb Binder GmbH, TSI, and the Waterloo Filtration Institute.

The FiltXPO exhibition takes place October 10-12 and will run concurrently with the technical program.

NatureWorks, the manufacturer of low-carbon polylactic acid (PLA) biopolymers made from renewable resources, hosted a cornerstone laying ceremony to celebrate construction of their new Ingeo™️ PLA manufacturing complex in Thailand. The ceremony which took place on February 1st, 2023 commemorated the progress made to date on the new fully integrated biopolymer facility. The day also featured a ceremonial groundbreaking that mirrored the ceremony held in Blair, Nebraska, USA in 2000 when NatureWorks began construction on the world’s first commercial scale PLA manufacturing facility.

The new manufacturing facility located on the Nakhon Sawan Biocomplex (NBC) in Nakhon Sawan Province, Thailand is designed to be fully integrated including production sites for lactic acid, lactide, and polymer. With completion expected in the second half of 2024, the manufacturing site will have an annual capacity of 75,000 tons and will produce the full portfolio of Ingeo biopolymer grades.

The expanded global production of Ingeo biopolymer will support growth in markets including 3D printing and hygiene as well as compostable coffee capsules, tea bags, flexible packaging, and food serviceware that demand sustainable, low-carbon biomaterials and require the high-performance attributes that Ingeo is uniquely suited to deliver.

“This ceremony is a meaningful milestone for the entire NatureWorks team,” said Rich Altice, president and CEO of NatureWorks. “For the last three decades, we have not only been building a company and manufacturing facilities, but also a whole new industry and market for low-carbon, renewable biomaterials that are revolutionizing the sustainability and safety of packaging and product materials used in our everyday lives.”

• RISE® – Research, Innovation & Science for Engineered Fabrics Conference – Returns In-Person

Nonwovens innovators will convene in-person for RISE® – Research, Innovation & Science for Engineered Fabrics Conference – the industry’s premier conference on nonwovens science and technology, Sept. 27-28 at North Carolina State University in Raleigh.

The 12th edition of RISE returns live to Talley Student Union after being held virtually over the last two years. The event is co-organized by INDA and The Nonwovens Institute at North Carolina State University. Registration is now open at the RISE® website. https://www.riseconf.net/

Experts in product development, material science, and new technologies will come together for this insightful two-day conference focused on promising technology developments, future needs and market opportunities. Participants will have opportunities to exchange views on innovative nonwoven technologies and applications, furthering INDA’s strategic initiative to connect and convene the industry.

The 2022 RISE® program will focus on breaking developments in responsible sourcing of nonwoven inputs, realistic end-of-life options, and circularity opportunities in the world of nonwovens and engineered materials with thought leaders presenting on these cutting-edge topics.

Innovations that solve problems and advance the nonwovens industry will be recognized with the 2022 RISE® Innovation Award. The award will be presented Sept. 28 in the culmination of the event. Companies can self-nominate products online http://www.inda.org/awards/rise-innovation-award.html until July 15.

RISE® participants will have the special opportunity on Sept. 27, from 5:30 to 7:30 p.m., to tour The Nonwovens Institute’s $50 million-plus, 60,000 square-foot facilities featuring state-of-the-art equipment, pilot lines and analytical facilities, and attend a networking reception at the on-campus Lonnie Pool Golf Course Clubhouse. The tour will be limited to 50 attendees and advance response is required. The reception will be open to all attendees.

Speaker Snapshot

A few topics that will be addressed by visionary speakers at RISE® include:

• North American Economic Outlook - Robert Fry, Jr., Ph.D., Principal, Robert Fry Economics LLC
• Sustainable Fibers – Developments and the Future - David Grewell, Ph.D., Director, Center for Bioplastics and Biocomposites
• Achieving Supply Chain Circularity - Redesigning Plastics to be Recyclable-by-Design - Kat Knauer, Ph.D., Program Manager - V Research, National Renewable Energy Laboratory (NREL)
• Novel Biobased Resins Outperforming Plastics and Other Biodegradable Biopolymers - Steven Sherman, CEO, BioLogiQ, Inc.
• Stereochemistry Strategies to Toughen Sugar-Based Polymers and Degradable Elastomers - Matthew Becker, Ph.D., Hugo L. Blomquist Distinguished Professor, Duke University
• Biobased Multicomponent Structures Providing Unique Characteristics and Sustainable Properties to Nonwovens - Kristel Beckers, Senior Application Technician, Total Corbion PLA

The Hygiene Fibers Group of Indorama Ventures (IVL) came together at the Index Show to present an all-inclusive range of recycled and biodegradable solutions for Hygiene Fiber and Nonwoven applications.

The combination of polymers, technologies, processes and global reach supported by the Hygiene Fibers Group – one of three business segments that make up Indorama Ventures – positions it within the Hygiene industry to meet increasingly challenging market demand for innovative sustainable solutions within the hygiene sector. Across the six brands and companies that make up Hygiene Fibers Group – Auriga, Avgol, FiberVisions, Indorama Asia, Trevira and Wellman International – sustainability and supporting customers to achieve circular objectives is integral to all efforts and fundamental to the ethos of the Hygiene business segment.

At the Index Show, the Hygiene Fibers Group launched CiCLO®, a textile technology which allows polyester and other synthetic materials to biodegrade like natural materials do in wastewater treatment plant sludge, sea water and landfill conditions, reducing synthetic microfiber pollution generated during washing, and minimizing plastic accumulation in landfills caused by discarded textiles.

In line with the company’s commitment to support customers with high performance products, while also reducing the impact on the environment, several of the  Hygiene Fibers brands, including Wellman International, Trevira GMBH and Auriga, have been working closely over the last 12 months with the IAM team and the CiCLO® technology. Developments have focused on PET and rPET staple fiber and filament sustainable solutions for applications where recycling is particularly challenging, such as Hygiene, Home Textiles and Automotive applications.

Strengthening the profile of biodegradable offerings within the Hygiene Fibers Group’s sustainability portfolio, Trevira introduced a new range of bicomponent fibres based on PLA and PBS (polybutylene succinate) at the Index show. Both biopolymers offer an exceptional technological opportunity in terms of environmental care and sustainability, while delivering optimum performance. Equally to PLA, PBS is recyclable and up to 100% biodegradable under industrial conditions.

Efforts towards supporting customers to achieve circular objectives are a priority within the Hygiene Fibers Group. This is reflected in the recycled fibers expertise deployed across the segment. Four Hygiene Fibers Group brands, IVL Asia, Auriga, Trevira and Wellman International offer an extensive range of 100% recycled, accredited PET fibers, across a multitude of fiber and nonwovens applications.

The development and evolution of sustainable technologies is central to activity across IVL’s Hygiene Fibers Group, with particular focus on sustainable polyolefin solutions. FiberVisions and ES-FIBERVISIONS, leading Polyolefin mono and bico fiber brands and sister company Avgol, have partnered with UK-based Polymateria to commercially harness the innovative ‘biotransformation’ technology pioneered by Polymateria. The patented technology alters the properties of polyolefins to make them biodegradable in a natural process.  Other polyolefin sustainable innovations within the Hygiene Fibers Group were featured at Index include biosurfactant and biocolourant developments being undertaken by the Avgol team with FiberVisons progressing sustainable design solutions, including lightweight, high performance, reduced carbon solutions.