Processing and characterizations of Short fluoroalkyl chain /polyurethane- polylactic acid/low melt polylactic acid Janus nonwoven Medical covers using spray coating

Medical product contamination is a seriously threatens patients’ health. However, few studies on the protective properties of nonwoven medical covers have been conducted. This work aims to develop bioenvironmentally friendly novel Janus polylactic acid (PLA)/low melt polylactic acid (LMPLA) nonwoven medical covers with asymmetric wettability and excellent mechanical, and abrasion resistance while maintaining outstanding breathability performance. The Janus fabrics have a dual structure with hydrophilic PLA/LMPLA nonwoven fabrics and hydrophobic short fluoroalkyl chain polymers/polyurethane membranes. Janus textiles are prepared through needle punch/ hot press bonding manufacturing and spray coating. The subsequent nonwoven fabrics exhibit an outstanding wettability gradient that offers the excellent protective performance of inner-layer liquid absorption to prevent flowback and outer-layer liquid repellence. Furthermore, the coating increases the tensile strength and abrasion resistance (of the fabrics by 2.5 times those of a previously reported PU coating reported in published paper). This kind of nonwoven fabrics is suggested to be a promising candidate for medical covers and health supplies.