Biodegradable resin composition, method for production thereof and biodegradable film therefrom

The invention is concerned with a biodegradable resin composition having a good biodegradability, a good mechanical 5 property and a good compatibility with starch, includes 40 to 80wt% of an aliphatic/aromatic copolyester resin, 8 to 40wt% of a polylactic acid(PLA), 0.1 to 1.0 wt% of a peroxide type high-temperature initiator, 10 to 40wt% of starch, 1 to lOwt% of a starch plasticizer, 0.1 to 5wt% of a starch structure 10 destroying agent, and 0.8 to 3.Owt% of a compatibilizer, based on 100wt% of the resulting biodegradable resin composition. The invention is also concerned with a method of manufacturing the biodegradable resin composition includes 15 steps of mixing 40 to 80wt% of an aliphatic/aromatic copolyester, 10 to 40wt% of a polylactic acid and 0.01 to 1.0 wt% of peroxide type high-temperature initiator, based on 100wt% of the resulting biodegradable resin composition in a mixer for 5 to 15 minutes, extruding the resulting mixture in 20 a twin screw extruder under the vacuum of 10torr or less at a temperature ranging from 150 to 200 0 C, and pelletizing the extruded material using a pelletizer after cooling.