公开(公告)号：US11511473B2

公开(公告)日：2022-11-29

申请号：US16490205

申请日：2018-02-28

申请人： TOYOBO CO., LTD. ,  Furanix Technologies B.V.

发明人： Shota Hayakawa ,  Yukihiro Numata ,  Katsuya Ito ,  Jun Inagaki ,  Toshiyuki Shimizu ,  Shoichi Gyobu ,  Chikao Morishige ,  Jesper Gabriel Van Berkel

IPC分类号： B29C48/305 ,  B29C48/08 ,  B29C48/00 ,  B29C55/12 ,  B29C71/02 ,  B29C71/00 ,  B29C48/885 ,  B29K67/00

摘要： It is provided that a method for producing a biaxially oriented polyester film that can be used for industrial and packaging applications. A method for producing a biaxially oriented polyester film, comprising: a step of feeding a polyester resin into an extruder, a step of extruding the molten polyester resin from an extruder to obtain a molten resin sheet at 250 to 310° C., a step of attaching the molten resin sheet closely to a cooling roll by an electrostatic application method to obtain an unstretched sheet, and a step of biaxially stretching the unstretched sheet, wherein the polyester resin fulfills the following (A) to (C): (A) the polyester resin comprises a polyethylene furandicarboxylate resin composed of a furandicarboxylic acid and ethylene glycol; (B) an intrinsic viscosity of the polyester resin is 0.50 dL/g or more; (C) a melt specific resistance value at 250° C. of the polyester resin is 3.0×107 Ω·cm or less.

公开(公告)号：US10407555B2

公开(公告)日：2019-09-10

申请号：US15756909

申请日：2016-08-31

申请人： TOYOBO CO., LTD. ,  SYNVINA C.V.

发明人： Jun Inagaki ,  Katsuya Ito ,  Toshiyuki Shimizu ,  Shoichi Gyobu ,  Chikao Morishige ,  Jesper Gabriel Van Berkel

IPC分类号： C08J5/18 ,  C08G63/16

摘要： To provide a furandicarboxylate unit-containing polyester film usable for industrial and packaging purposes. The film of the present invention is a polyester film, which is a biaxially oriented film of a polyester resin including a dicarboxylic acid component containing mainly a furandicarboxylic acid and a glycol component containing mainly ethylene glycol, wherein the film has a plane orientation coefficient ΔP of not less than 0.005 and not more than 0.200 and a film thickness of not thinner than 1 micro meter and not thicker than 300 micro meters.