Transforming Discarded Fishing Nets into Medical-Grade Membranes: A Breakthrough in Circular Nylon Innovation

​Used fishing nets    Image source: Pixabay

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The Taiwan Textile Research Institute (TTRI) has pioneered a major advancement in circular materials through its Looping Nylon Technique, which transforms discarded fishing nets into high performance, medical-grade nylon membranes. This technology, recognized at the 2025 R&D 100 Awards, directly tackles the environmental challenge posed by Taiwan’s large volume of fishing net waste, estimated at over 2,300 tons annually, and the difficulty of recycling due to severe contamination and mixed-material composition. TTRI’s patented ultrasonic purification process significantly improves recyclability by eliminating embedded pollutants and restoring nylon fiber purity to 98%, while reducing water usage by 90%. The regenerated nylon is further modified to enhance elasticity, durability, and moisture permeability, enabling the production of ultra-thin membranes with strong waterproofing, abrasion resistance, and inherent antimicrobial properties.
To meet the stringent standards of medical applications, TTRI worked with Carilex Medical to develop an innovative dual-layer co-extrusion and thermal lamination method that creates a mono-material membrane system without solvent-based adhesives. This design not only supports up to 20 recycling loops but also reduces carbon emissions by more than 70% compared with traditional processes. The resulting membranes are lightweight, airtight, and mechanically robust, offering reliable performance for smart medical air-pressure mattresses and promising value in additional high-demand sectors such as aerospace, emergency equipment, military protection, and advanced outdoor textiles.
With multiple Taiwanese manufacturers already adopting the technology, the Looping Nylon Technique is accelerating industrial sustainability and reducing carbon footprints as recycled nylon emits just 0.599 kg CO₂ per kilogram compared to 7.44 kg CO₂ for virgin nylon. This achievement highlights Taiwan’s growing leadership in green manufacturing and strengthens its position within global supply chains for recyclable, high-performance materials, supporting worldwide circular economy and carbon reduction goals.