公开(公告)号：US20210016484A1

公开(公告)日：2021-01-21

申请号：US16490205

申请日：2018-02-28

Applicant: TOYOBO CO., LTD. ,  FURANIX TECHNOLOGIES B.V.

Inventor： Shota HAYAKAWA ,  Yukihiro NUMATA ,  Katsuya ITO ,  Jun INAGAKI ,  Toshiyuki SHIMIZU ,  Shoichi GYOBU ,  Chikao MORISHIGE ,  Jesper Gabriel VAN BERKEL

IPC: B29C48/00 ,  B29C48/305 ,  B29C48/08 ,  B29C55/12

Abstract: 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：US20180244878A1

公开(公告)日：2018-08-30

申请号：US15756909

申请日：2016-08-31

Applicant: TOYOBO CO., LTD. ,  SYNVINA C.V.

Inventor： Jun INAGAKI ,  Katsuya ITO ,  Toshiyuki SHIMIZU ,  Shoichi GYOBU ,  Chikao MORISHIGE ,  Jesper Gabriel VAN BERKEL

IPC: C08J5/18 ,  C08G63/16

CPC classification number: C08J5/18 ,  C08G63/16 ,  C08J2367/02

Abstract: 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 AP 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.