Investigation of Thermal Properties of Different Particle Size Perlite Coated Polyester Nonwoven

Perlite is used several applications on building construction for heat and sound insulation, on agriculture and greenhouse for filter purposes. The aim of this study is to investigate the usability of perlite coated polyester fabric to see the thermal insulation applications. Polyester nonwoven with 180g/m(2) weight was coated with four different particle size perlite stone powders. The expanded perlite grinded into small particle size and then sifted to obtain 600-1200 mu m, 210-590 mu m, 120-170 mu m and 0-120 mu m sized perlite powder. The amount of perlite powder was the same for all samples used on this study. Before coating process the polyester nonwoven was applied to water repellency treatment and then polyurethane based coating material was applied onto samples together with perlite powder. After coating process the samples were processed at 100 degrees C for 10 mins. As a result, it was observed that the thermal coefficient increases with decreasing particle size of perlite. One of the major purpose of this study is to reduce the greenhouse gases such as CO2 emission leading to cause low heating sources on habitants.