公开(公告)号：US20230150171A1

公开(公告)日：2023-05-18

申请号：US17997341

申请日：2021-03-08

申请人： Mitsubishi Engineering-Plastics Corporation

发明人： Takafumi YOSHINO ,  Toshiyuki TAJIRI ,  Hiroyuki TAJIMA

IPC分类号： B29B9/06 ,  B29C48/405 ,  B29C48/00 ,  C08G64/00 ,  C08K5/521 ,  C08L55/02

CPC分类号： B29B9/065 ,  B29C48/405 ,  B29C48/022 ,  C08G64/00 ,  C08K5/521 ,  C08L55/02 ,  B29K2069/00

摘要： A method for producing a polycarbonate resin composition pellet with a twin screw extruder, the polycarbonate resin composition pellet has 30 to 95 mass % of a resin pellet (A) containing more than 40 mass % of a polycarbonate resin in the pellet; not less than 5 mass % and less than 40 mass % of a phosphate ester flame retardant (B) that is a liquid at room temperature; 0 to 50 mass % of polycarbonate resin flake (C); 0 to 30 mass % of an ABS resin (D); and 0 to 15 mass % of an additive (E) other than component (B). The method includes feeding components (A), (C), (D) and (E) in a twin screw extruder and kneading with a first kneading zone; feeding component (B) to a downstream part in the first kneading zone and kneading with a second kneading zone; and decompressing a vent in the downstream part in the second kneading zone.

公开(公告)号：US20240076455A1

公开(公告)日：2024-03-07

申请号：US18262683

申请日：2022-01-13

申请人： MITSUBISHI ENGINEERING-PLASTICS CORPORATION

发明人： Toshiyuki TAJIRI ,  Masaru TAKEHANA

IPC分类号： C08J3/20 ,  B29B7/48 ,  B29B7/90 ,  C08K7/14 ,  C08L67/02

CPC分类号： C08J3/203 ,  B29B7/48 ,  B29B7/90 ,  C08K7/14 ,  C08L67/02 ,  B29K2067/006 ,  C08J2367/02

摘要： A method for manufacturing a fiber-reinforced polybutylene terephthalate resin composition contain 40-90 mass % of a polybutylene terephthalate resin, 10-60 mass % of a reinforcing fiber, and 0-35 mass % of other polymer or additive by using a twin-screw extruder, the method includes using polybutylene terephthalate resin pellets (avg. weight of 16-29 mg) as a raw material for the resin by: (1) kneading the resin and the fiber with a first kneading part; (2) adding the fiber at a part downstream of the first kneading part and performing kneading with a second kneading part; and (3) reducing pressure of a vent at a part downstream of the second kneading part and performing devolatilization, where the first kneading part has a length of 5.0-9.0 D and a specific screw configuration, the second kneading part contains a specific screw configuration, and the production is carried out with a screw shaft torque density of 11.5-19 Nm/cm3.