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PFAS regulations prompt innovation

The increasing stringency of regulations surrounding per- and polyfluorinated alkyl compounds (PFAS) is compelling manufacturers and suppliers to innovate and adopt fluorine-free alternatives, especially for durable water repellent (DWR) textiles, fibers, and finishes. Historically, PFAS chemistries, particularly C8 and later C6, have been widely used for their repellent properties against water, stains, oil, and other substances. However, mounting concerns about their environmental persistence and toxicity to human and animal health are driving a significant shift away from these chemicals. Several companies are at the forefront of this transition. Schoeller Textil AG, for instance, has been developing its C0 fluorine-free DWR finish, Ecorepel®, for over 15 years. This bluesign®-approved solution mimics nature's repellency by forming a thin, high-tech film around fabric fibers, allowing water droplets and dirt to run off. While C0 finishes compare favorably to C6 in initial spray ratings and wash durability, they still face challenges in oil repellency and protection against blood-borne pathogens, which means some critical applications, like those for first responders, continue to rely on C6 solutions for ultra-protection. Schoeller Textil anticipates continued improvements in C0 DWR performance and durability, with a focus on tailoring them to specific end uses and evolving away from the need for oil repellency in broader applications. Milliken & Co. announced in February 2023 its successful removal of all PFAS from its textiles, fibers, and finishes, becoming the first multi-market U.S.-based textile manufacturer to achieve this. This transition involved an 18-month process of evaluating and vetting dozens of non-PFAS technologies across hundreds of products to ensure equivalent efficacy and functionality. The company found alternative non-PFAS solutions for all DWR applications, including its Milliken Outdoor Fabrics line and Westex AllOut® flame-resistant fabric. Milliken's experience suggests that while finding the right non-PFAS solution for each specific application can be challenging, suitable alternatives exist for even demanding uses like roofing materials. Bolger & O’Hearn (B&O;) Inc. has also made PFAS removal a primary objective for the past five to seven years, offering fluorocarbon-free solutions like Shell-Tech Free M325-SC1 and Shell-Tech Free 6053. These aqueous finishes, based on hydrophobic-reactive polymers, provide high water repellency and excellent wash durability for various natural and synthetic fibers. While fluorine-free DWRs excel in water repellency and stain resistance against water-based substances, they do not match the oil repellency provided by fluorochemicals. This distinction means that while many clothing brands have shifted to fluorine-free products, industries requiring high oil repellency, such as military and medical applications, still depend on PFAS-based repellents. Experts agree that fluorine-free DWRs are significantly more eco-friendly due to the absence of PFAS, and some newer chemistries incorporate biomaterial content and improved biodegradability. While these alternatives generally do not negatively impact the end-of-life recyclability of textiles, the textile industry is still learning about the specific requirements of various recycling processes. The shift away from PFAS-based repellents is expected to continue, potentially altering consumer expectations for oil and stain resistance in certain products, and may lead to relaxation of oil repellency standards in some applications to further drive demand for fluorine-free alternatives. #PFASRegulations #TextileInnovation #DurableWaterRepellent #FluorineFree #SustainableTextiles #MaterialScience #EnvironmentalCompliance #GreenChemistry #ProductDevelopment #PFASRegulations #TextileInnovation #DurableWaterRepellent #FluorineFree #SustainableTextiles #MaterialScience #EnvironmentalCompliance #GreenChemistry #ProductDevelopment
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