| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a polylactic acid resin composition which is excellent in bending strength and further to provide the polylactic acid resin composition obtained by the method and a molding of the polylactic acid resin composition. SOLUTION: A kneader has a barrel 2 and a screw 1 which has a kneading part inserted in the barrel and has an outer diameter of D(mm). Further the kneader has at least one or more raw material supply ports a, one or more raw material supply ports b and a kneaded material discharge port in this order. When length from an exit side end part of the barrel which is located nearest the exit of the kneader to an entrance side end part of the raw material supply port which is farthest from the end part is defined as L(mm), the kneader having L/D of 40 to 110 is used and a raw material (a) containing a polylactic acid resin, a crystal nucleating agent and a plasticizer is supplied from the raw material supply port a and is melted and kneaded and then a raw material (b) containing a polypropylene resin and a compatibilizer is supplied from the raw material supply port b and melting/kneading is carried out together with molten kneaded material of the raw material (a). The method for producing the polylactic acid resin composition includes this process. COPYRIGHT: (C)2010,JPO&INPIT |
