STEREOCOMPLEX COMPOSITION OF POLYLACTIC ACID WITH SUPERIOR THERMAL RESISTANCE AND IMPACT STRENGTH AND INJECTION MOLDING METHOD FOR THE SAME

摘要

Disclosed are a polylactic acid stereocomplex resin composition which comprises: (A) 40-97 parts by weight of crystallized L-polylactic acid; (B) 3-50 parts by weight of crystallized D-polylactic acid; and (C) 5-30 parts by weight of impact modifiers, and a molding method using the same. The present invention provides an optimum molding method under injection molding conditions through the temperature control of the surface of the cavity of a mold and the heat treatment of molded products, and the polylactic acid stereocomplex resin composition which is suitable for the method. Accordingly, the present invention provides molded products with excellent heat resistance, impact resistance and dimensional stability by improving the crystallization rate and crystallinity in injection molding conditions, so that the molded products are able to be applied to various industrial materials such as automobile interior materials, materials for components, materials for domestic appliance and the like.