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In this present work mechanical and thermal characterization of egg shell fine micro particles reinforced natural rubber composite was investigated. The principal aim of this work is to enhance mechanical and thermal properties of natural rubber by reinforcing 15, 25 & 35wt% of domestic waste egg shell fillers. Egg shell fillers of dimension 800nm were confirmed by particle size analyser. Similarly morphology of spherical shape was confirmed by scanning electron microscopy. Egg shell fillers were surface treated by an amino silane (APTMS) to reduce clustering. Thin sheets of 3mm were made by two roll mill followed by thermo curing was applied. The mechanical and thermal properties were analysed followed by ASTM standards. The mechanical results shows, the additions of egg shell fillers to natural rubber the Visco-elastic properties get affected. But the hardness and wear results were improved. The thermal …