Preparation of Anti-haze Composite Window Screen Based on Nanofibers and Study on the Composite Process Parameters

: As air pollution has become increasingly serious, anti-haze filter materials have received considerable attention. In this study, a composite window screen with a sandwich structure consisting of a polyacrylonitrile (PAN) nanofiber membrane as the filter layer, a 30 mesh glass fiber mesh as the supporting layer, and a 120 mesh polyester fiber mesh as the protective layer was prepared. We analyzed the effects of different composite methods and composite parameters on the performance of the anti-haze window screen. The results showed that with an increase in the ultrasonic pressure, the peel strength increased, but the nanofiber membrane was damaged by the ultrasonic treatment and the filterability decreased. Using a hot melt adhesive compounding process, the peel strength of the composite window screen increased with an increase in adhesive amount; however, the filtration efficiency remained nearly constant at 95 %, despite the increase in the filtration resistance. The optimal amount of adhesive was confirmed as 1.2 g/m 2 . In addition, the hot melt adhesive composite technology is simple and controllable, which is beneficial for the industrial production of anti-haze window screens.