Filtrating characteristics of polymeric porous composites composed of polypropylene and polyethylene

Polymeric porous composites consisting of polypropylene (PP) and polyethyle ne (PE) powder were prepared by continuous extrusion sintering method for u se in air purification systems. SEM analysis showed that a composite polyme ric porous structure made up of PP and PE was obtained. The morphologies co nsisted of PE melted and adhering to PP domains due to the lower melting te mperature of PE than that of PP. The filtrating characteristics and mechani cal properties of polymeric porous composite materials were investigated wi th variation in head die temperature of extruder, extrusion velocity, and t he content and melt index of PE. The filtration efficiency increased with P E. However it increased by increasing the melt index of PE. The developed p olymeric porous composites composed of PP and PE was suitable as the filter ing element of air purification systems.