Passive Cooling Fiber

This Cooling Polyester Fiber is produced by standard polyester melt spinning, with customizable fiber specifications to meet diverse downstream textile processes and end- product requirements. Its physical and mechanical properties are optimized for textile spinning, featuring stable dry breaking strength and moderate elongation, ensuring good spinnability for knitted and woven fabrics of different densities and textures. Core micro-nano optical functional components are homogeneously dispersed in the fiber matrix via melt compounding. This avoids functional decay caused by post-coating finishing and guarantees long-term stable cooling and anti-UV performance. Fiber cross-sections can be flexibly customized into round, Y-shaped, cruciform and other profiles as required. Different cross-section geometries, combined with yarn twisting parameters, adjust the optical stacking effect of finished fabrics and further optimize solar heat reflection and infrared radiative cooling efficiency. Natural white is the standard color, while customized dope-dyed variants are available to support diversified product designs. The fiber features integrated functional and structural stability. Its internal optical structure will not fail under normal washing and wearing. Finished fabrics maintain durable cooling and sun protection while retaining soft, breathable and skin-friendly properties, suitable for repeated long-term use.