میثم معزی

The aim of present work is to enhance thermal insulating ability of nonwovens by surface coating of needled fabrics with various types of ceramics. Silica (SiO2), alumina (Al2O3), silicon carbide (SiC) powders together with SBR latex and wax as binders was used as coating components. Coated samples of needled nonwovens were prepared. Thermal conductivity of samples was measured using guarded hot-plate principle. It was found that silicon carbide coated samples exhibited higher insulating ability than samples coated with the other ceramic powders. As far as binders are concerned it was concluded that samples treated using latex binder performed better thermal insulation properties than wax treated samples.