In this study, it is devoted to develop a nove1 natural antibacterial material of utilizing sintered oyster shell powder. The general shell is composed of calcium carbonate, which will converse into ca1cium oxide by sintering of more than 700℃ The main antibiotic factor is O2 which made of calcium oxide of the conversion ratio of calcium carbonate. There is an antibacterial effect by adding oyster shell powder which could improve the properties of plastic and the strain is increased with 75% by this stress test.
