BIODEGRADABLE RESIN COMPOSITION CONTAING IMPROVED PHYSICAL PROPERTY AND METHOD FOR MANUFACTURING THE SAME

摘要

A biodegradable resin composition is provided to lower the costs of product by using inexpensive additives with excellent biodegradation property, to obtain heat resistance through reforming the property of starch and to enhance compatibility with fatty aliphatic polyesterification. A biodegradable resin composition is manufactured by the steps of: (S1) mixing starch, aliphatic polyester, inorganic filler, plasticizer and lubricant in a high speed mixer and removing moisture; (S2) adding antioxidant, aliphatic polyester and compatibilizer to the moisture-removed mixture, and mixing the mixture at high speed; (S3) adding PCL to the mixture and mixing it at low speed; and (S4) injecting the mixture in a twin extruder, dying after cutting the material discharged through dice, or cutting after transferring the discharged strand through a conveyor belt and drying it to manufacture the pellet type.