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Line for Production of Pure AC Electrospun Nanofibrous Yarn

The use of textiles and yarns is currently moving from the traditional areas of dressing to the technical and biological areas. In fact, textile formations are increasingly used in high added value applications such as composites, filtration media, gas separation, sensors and biomedical engineering. With the development of nanotechnology, industrial manufacturers are quite logically focusing their attention more and more on the production of nanofibers.

The development of electrospinning technology is likely to make it possible to produce nanofiber yarns with a diameter of several microns in the foreseeable future. The potential of electrostatic technology may lead to relatively high production rates of such yarns. These can be further used for the production of conventional flat textiles such as knits, woven fabrics and lace. Research into the application of nanofibers and the optimisation of their production processes is likely to make electrospinning the dominant technology for the production of nanofibers and subsequently textile flat formations, which will lead to significant discoveries and applications to be realised later this century.

Nanofibrous yarns are unique materials for production of flexible materials with extraordinary properties. These yarns produced by AC electrospinning contain thousands of fibres with radii of approximately 600 nm on their perpendicular cross-section. Hence, a yarn containing 1500 nanofibres has a huge specific surface area. One meter of such yarn contains about 50 cm2 of the solid - air interface with a polymer bulk of only 1.7 10-3 cm3. Such a large specific surface with a fine open pore structure creates a material with slow diffusion of gases and liquids, high filtration efficiency, intensive drug release or high-efficient adsorption of specific molecules on its surface.

Continuous production of submicron diameter fibres will enable a new generation of yarns and textiles. It is foreseeable that these yarns will have applications in almost all current textile product groups.

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The core technologies are protected by International Applications WO2014094694 A1, WO2017108012 A1, WO2016192697 A3 and WO2019047990 A1 and patented by US10927480, US10041189, US11155934B2, US10808334B2, EP2931951B1, EP2931951, CN105008600B, JP6360492B2, RU2672630C2, ES2762300T3 patents.

References

• Lukas, D, et al., Effective AC needleless and collectorless electrospinning for yarn production, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 16 (48), pp. 26816-26822, 2014.

• Valtera, J, et al., Fabrication of dual-functional composite yarns with a nanofibrous envelope using high throughput AC needleless and collectorless electrospinning, Scientific Reports, 9 (1), Article number 1801, 2019

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