Patent ID: 9138915
Filing Date: 2015-09-22
Classification: B29B,B29C,B29K,C08J

Abstract:
1. A method for producing a resin composition, the method comprising a step of feeding a resin (A) and a fibrous filler (B) to an extruder, melt-kneading and then extruding the resin (A) and the fibrous filler (B), wherein in the extruder comprises a cylinder, a screw mounted within the cylinder, a main feed port provided in the cylinder, and a side feed port provided downstream from the main feed port in the extrusion direction, part of the resin (A) and part of the fibrous filler (B) having a weight-average fiber length of not less than 1 mm are fed through the main feed port and the rest of the resin (A) and the rest of the fibrous filler (B) having a weight-average fiber length of not less than 1 mm are fed through the side feed port, wherein X 1 /X 2 =55/45 to 70/30, Y 1 /Y 2 =75/25 to 25/75, and X 2 /Y 2 =90/10 to 45/55, where the amount of the part of the resin (A) to be fed to the main feed port is represented by X 1 , the amount of the part of the fibrous filler (B) to be fed to the main feed port is represented by Y1, the amount of the rest of the resin (A) to be fed to the side feed port is represented by X 2 , the amount of the rest of the fibrous filler (B) to be fed to the side feed port is represented by Y 2 , and X 1 +X 2 +Y 1 +Y 2 =100% by weight.