Title:
ポリ乳酸樹脂組成物の製造方法
Document Type and Number:
Japanese Patent JP5608540
Kind Code:
B2
Abstract:
A method for producing a polylactic resin composition, said method comprising kneading a mixture, which contains a polylactic resin and a surface-treated inorganic powder, using a mutual meshing engagement type twin-screw extruder, with the mutual meshing engagement type twin-screw extruder satisfying requirements 1-3. Requirement 1: being provided with: a first temperature-determining zone, said first temperature-determining zone being formed so as to include an area at least 6.3D-13Dmm apart from the center position of a starting material-supply port of a barrel, setting the barrel temperature to (Tm+50)-(Tm+80)oC, and being provided with screws to which conveyance elements are attached; and a second temperature-determining zone, said second temperature-determining zone being formed so as to include an area at least 19.3Dmm or greater apart from the center position of the starting material-supply port of the barrel and setting the barrel temperature to (Tm-20)-(Tm+40)oC. Requirement 2: being provided with a first kneading part, said first kneading part having a length of 1D-4D mm and being provided with screws having kneading elements attached thereto, in an area 13D-20.9Dmm apart from the center position of the starting material-supply port of the barrel. Requirement 3: being provided with a second kneading part, said second kneading part having a length of 1D-4D mm and being provided with screws having kneading elements attached thereto, in an area of 20.9Dmm or greater apart from the center position of the starting material-supply port of the barrel.
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Inventors:
Hiroaki Kishimoto
Akira Takenaka
Akira Takenaka
Application Number:
JP2010283537A
Publication Date:
October 15, 2014
Filing Date:
December 20, 2010
Export Citation:
Assignee:
Kao Corp.
International Classes:
B29B7/90; B29B7/48; B29B7/72; C08J3/20; C08K9/00; C08L67/04; C08L101/16
Attorney, Agent or Firm:
Patent business corporation MAEDA PATENT OFFICE
Hiroshi Maeda
Yuji Takeuchi
Hiroshi Maeda
Yuji Takeuchi