Advanced Textiles Source
The apparel and footwear industry is forecast to generate double-digit growth to 2020 according to business analysts McKinsey & Co. One of the challenges is reconciling this growth with sustainability initiatives. As this report states it, “Sustainability and rapid business growth are not compatible; to pretend otherwise would be disingenuous.” The solution proposed is an alternative business model that is based on a closed-loop system.
A circular economy
The Ellen MacArthur Foundation describes the circular economy as being “restorative and regenerative by design, and which aims to keep products, components and materials at their highest utility and value at all times, distinguishing between technical and biological cycles.” In striving to achieve greater environmental responsibility, the notion of a circular economy is the latest iteration in creating a blueprint for industry.
In his book, Closing the Loop, Brett Matthews asks whether this laudable aim of infinite recycling is in fact realistic. The report is divided into seven sections and concludes with actionable recommendations and further reading resources. The first section gives an overview of the issue, definitions, and the global and local challenges. The second section considers how these principles are applied largely using interviews with innovative thinkers, manufacturers and brands. The approach provides a clear introduction for readers new to the field, as well as more in-depth information and actionable strategies for those already implementing a sustainable plan.
In the U.S. there are an estimated 25 billion pounds of textile waste generated annually of which just 15 percent is donated or recycled, much of it shipped to African countries. In Uganda, 81 percent of all clothing sold is second hand, according to Dr Andrew Brooks, whose book Clothing Poverty investigates the connection between garment retailers and sub-Saharan poverty.
Recycling alone is clearly not enough. Extended Producer Responsibility (EPR) is one of the initiatives that’s attracting much interest as a way of promoting recycling and end-of-life management. The European Union (EU) has already successfully implemented such schemes for the automotive and packaging industries. Voluntary measures are also not enough, but they do serve an important function with trial initiatives on a small scale, before larger investment is made. Ultimately, legislation is needed at an industry or global level.
Mechanical textile separation has been used with some success for quite a while, but the increase in blends and hybrid textiles, laminates and finishes make this process increasingly difficult. Chemical recycling is now receiving more attention and some funding – in Europe.
Scale is a key issue in the sustained supply of quantity and quality of material ideally achieved locally to prevent increasing the carbon footprint. Solvay’s Move4earth is a European Union funded project that seeks to recycle airbags using a technology that allows them to separate the technical textile from its coating without any significant loss to the material properties.
The VTT Technical Research Centre of Finland have been developing a cellulose dissolution process for recycling cotton that reduces the water footprint by 70 percent and the carbon footprint by up to 50 percent.
In North America, Evrnu use a combination of chemical and mechanical processes to recycle post-consumer cotton garments. The process is designed to prevent off-gassing, reusing solvents and manage the environmental impact in a closed vat system. Importantly for the industry, it works within existing apparel business models.
“Going circular” successfully will require a varied but cohesive approach, and should include these considerations:
- Whole system solution: The issue has to involve stakeholders at every stage, as textile innovation alone is not enough.
- Collaboration: This needs to go beyond textile manufacturers and brands to include retailers.
- Mechanical versus chemical recycling: Partnerships are crucial to achieve scalability and commercial success.
- Complexity: More research is needed to determine the level of benefit measured against cost of development and implementation.
According to Deloitte’s 2016 Global Manufacturing Competitive Index (GMCI) report the U.S. is set to overtake China as the most competitive manufacturing nation within five years. This brings tremendous opportunity and responsibility for North America to take the lead in developing the principles of a circular economy for the apparel and textile industry. This has to be part of the innovation agenda if it is to be made to work environmentally and economically.
*This story first appeared on Advanced Textiles Source
Sustainability in textile development and manufacturing is an ongoing conversation, much of it revolving around processes that conserve energy, water and natural resources. But beyond manufacturing processes, sustainability issues are driving true technical innovation, resulting in new products offering a host of advantages.
Replacing PFCs in DWRs
The search for alternatives to perfluorinated compounds (PFCs) such as PFOA and PFOS (used to render textiles durably water and stain repellent have been front and center, primarily in the apparel , carpet and upholstery, and outdoor sectors. Loudly condemned by NGO and sustainability campaigner Greenpeace, and subsequently by various government organizations, PFCs persist in the environment and bio-accumulate in animals and humans, creating a number of health issues.
The European Union has banned the use of PFOS, and is considering a restriction on PFOA. In the U.S., the Environmental Protection Agency (EPA) negotiated with the chemical companies who produced them to phase out PFOA by 2015. As a result, textile and chemical companies have been forced to innovate sustainable, water or bio-based DWR finishes such as Chemours™ Teflon Eco-Elite™, Sciessent CURB™, Huntsman PHOBOTEX®, Schoeller® Technologies ecorepel®, HeiQ Eco Dry, and Bolger & O’Hearn’s Altopel F3®.
Based in Fall River, Massachusetts, Bolger & O’Hearn developed Altopel F3 some time ago, but felt that testing with the Hohenstein institute would add legitimacy to the product, which is now being launched via textile marketing group Concept III. “Sustainability is inspiring us to take a closer look at our raw materials and supply chain,” says Shawn Honeycutt, Bolger & O’Hearn sales manager. “We think we have the best performing product in the market.”
The PFC-free alternatives generally impart a softer hand to textile products, and repel water-based stains; but unlike PFC-based finishes, they do not have the ability to repel oil-based dirt and stains. As a result, some manufacturers of high-performance outdoor gear, such as Patagonia and W.L. Gore & Associates, are funding additional research. Patagonia has invested in a Swiss company, Beyond Surface Technologies, which is working to develop better chemistries for outdoor apparel; the Gore Enterprise is putting $15 million into researching non-PFC materials. The first non-PFC Gore-Tex products should be available in 2018.
At Chemours, “The story is moving towards stain management,” says Gerald Brown, the company’s principal investigator for textiles R&D. “Our customer is asking for it, and we feel we are making strides towards that end.”
Improving on nature
While many proponents of sustainable textiles maintain that you can’t beat Mother Nature, the truth is that innovative synthetic materials are being engineered with better green credentials. Nonwoven wipes are an example. The market for single-use, personal care wipes (generally made from polyester) reached $8.2 billion in 2013, according to Euromonitor International, and is expected to grow at a CAGR of 3 percent through 2018.
While most wipes are not flushable, ending up in landfills, consumers are demanding the convenience of a flushable wipe. A large proportion of wipes are flushed anyway, much to the dismay of municipalities who must deal with the problem of blocked sewers.
The industry is developing new requirements for flushable wipes, and some manufacturers have turned to cellulosic fibers, which can be more easily biodegraded. But according to Bynum Poole, president of the Greenville, South Carolina-based Poole Co., a leading distributor of polyester fibers for the nonwovens industry, cellulosic nonwovens are more expensive and more difficult to process than polyester.
Like many polyester suppliers, the company offers post-consumer recycled fibers, via their EcoSure® brand. Last year the company took the process a step further with the development of EcoSure® BioBlast™, a biodegradable fiber made from 100 percent recycled PET bottles, shown to biodegrade 12 times faster over a year in landfill conditions than traditional polyester fibers.
While biodegradable is not the same as flushable, it is perhaps a step in the right direction. According to Poole, the product could be tweaked to biodegrade faster to meet the needs of a brand partner. “The nonwovens ship turns around slowly,” he confessed. “But we have a lot of interest and ongoing trials.”
EcoSure BioBlast fibers are also seeing interest from outdoor apparel and sock brands, as well as the automotive industry, Poole says.
The textile industry is also taking a closer look at the sustainability story being told by bio-based fibers such as DuPont™ Sorona®, which has been around for more than a decade. Given the generic “triexta,” Sorona is a type of polytrimethyl terephthalate (PTT) containing 37% Bio-PDO™ (bio-based 1,3 propanediol), made by fermenting glucose from corn.
“We’ve never really told our story,” says John Sagrati, global segment leader for Sorona carpet. “Sorona is more like a natural fiber; it comes from fermentation. Think of us as a natural fiber, with the same softness as cashmere or silk; and great natural springiness. The magic is in designing from nature forward, instead of being ‘just like’ other synthetics in the market.”
Bio-PDO™ (bio-based 1,3 propanediol) contains three carbons, and nature is filled with three-carbon and six-carbon forms. “People are beginning to understand the concept of ‘biomimicry’,” says Renee Henze, global marketing manager for Sorona.
Because those carbons are impervious to stains and odor, Sorona has seen its greatest success in carpeting. Sagrati pointed out that soft, resilient Sorona carpet fibers don’t require coating with silicone softeners or stain-resistant finishes (read: no PFCs). “It doesn’t look or feel synthetic; there’s no extra stuff on it,” he said. “And moths won’t eat Sorona.”
The Sorona technical team is also working closely with carpet mills to develop new blends that take advantage of the fiber’s softness, and to engineer latex-free backings, further reducing the product’s environmental footprint.
The latest use for sustainable Sorona fibers is in makeup brushes, where it replaces natural animal hair. Sorona’s softness and stain-resistant qualities are also attracting the high-end automobile industry, where “glowing” light-colored interiors are trending, according to Sagrati.
Creatively applying recycling
The proliferation of closed-loop textile systems that keep textile waste out of the landfill is creating a host of recycled yarns and materials that can be used to make new textiles, primarily for apparel and industrial end uses such as insulation, batting and bedding. But recycled and sustainable materials are also being used to engineer highly technical products.
Leaders in this area are Leigh Delaware Holdings, the parent company of South Carolina-based Leigh Fibers, a processor and trader of recycled fibers, and ICE Recycling, which reprocesses polymers, cardboard and metal. Leigh recently announced the formation of a third sister company, SmartVista™, to focus on the development of new products and technologies from these materials for a variety of industries.
SmartVista’s first product, called SPILLARMOR™ – RDS100, is a lightweight, self-contained emergency response unit designed to rapidly absorb hydrocarbon spills.
“SmartVista will continue developing customer focused technologies for a wide array of industries where sustainable solutions may not currently be available,” says Mariel McAllister, director of public relations for the three companies. Through sustainable engineering, Leigh Fibers has diverted morethan 14 billion pounds of textile waste and byproducts from landfills.
There are dozens of sustainability-driven innovations currently in development in the world of textiles, from synthetic spider silk and fibers spun from oceanic plastic waste, to eco-alternatives to spandex, dyes and printing inks, goose down, building materials, or geo-synthetics. Indeed, one could argue that sustainable imperatives are perhaps the greatest driver of textile innovation today, giving product developers the opportunity to not only make textiles more sustainable—but to create something new and different in the process.
*This story first appeared on Advanced Textile Source
If nature has figured out a pretty good way to do something, it would make sense to try and copy it, right?
Lizards that change color for camouflage … moisture that beads up and rolls right off a lotus leaf … the aerodynamics of a humpback whale, pirouetting under water … tree frogs that climb a smooth, vertical surface.
Areas as diverse as transportation, energy, communication, medicine, agriculture and architecture are all finding useful innovations based in the natural world that will improve the way we solve problems and create new products—including textiles.
In his article, “Biomimetics and biotextiles,” Dr. Seshadri Ramkumar points out examples of research that could change the way we think about stain-repellant treatments, insect repellency, antibacterials and other performance qualities desirable in many textiles. And these are just some of the developments.
The Biomimicry Institute, based in Missoula, Mont., uses this definition. “Biomimicry is an approach to innovation that seeks sustainable solutions to human challenges by emulating nature’s time-tested patterns and strategies.”
Notice that word “sustainable.” The beauty of emulating nature’s own magic is that the solutions are so often more sustainable than the ones we’ve been using, and if, in particular, it involves an organic material readily available, it’s likely to be very economical, as well.
So if all this is the case, why isn’t this just the way we do things?
Well, first we had to figure out how that tree frog could so easily adhere to a vertical surface—while sleeping. Then we had to figure out the structure of the frog’s foot pads so we could figure out a way to make them to people scale. Then we had to get the backing to commercialize it, the legal support to patent it, never mind the approval of whatever government agency is applicable. Something like that.
Still, it is happening, and it’s happening at a quicker pace because of cost and sustainability issues. The interest in tree frogs’ mind-boggling climbing ability is relatively old news in this field. In fact, the science behind all sorts of flora and fauna is prompting research and innovations that could impact so many facets of our lives. Textiles, which can be engineered in almost limitless ways, are figuring into the picture.
Some examples …
Have you heard about earthworm-inspired filtration for healthier soil? University students in Oregon figured this one out.
Scientists discovered that the Galapogos Shark had no bacteria on its skin. Sharklet Technologies took this research and turned it into “Sharkskin” wound dressing, designed particularly for battlefield wounds, to speed healing and reduce patient discomfort, and other bacteria-repelling products.
Though not precisely “biomimicry,” the Watercube at the Beijing Olympics copied the structure of soap bubbles to create a facility that was earthquake resistant, gathered solar energy to heat the pool, and naturally shed the city’s dust and smog grime when it rained.
There’s an example “closer to home, too; how would we ever get along without Velcro®?
*This story first appeared on Advanced Textiles Source