公开(公告)号：CA3031918C

公开(公告)日：2021-02-16

申请号：CA3031918

申请日：2017-07-25

Applicant: UBE INDUSTRIES

Inventor： OHYA SHUSEI ,  MATSUO MAKOTO ,  BAMBA KEITA

IPC: C08J9/26 ,  B01D39/16 ,  B01D71/68

Abstract: Provided are: a porous polyether sulfone film having macrovoids and having excellent dimensional stability; and a production method therefor. Provided is a porous polyether sulfone film having a surface layer (a), a surface layer (b), and a macrovoid layer interposed between the surface layer (a) and the surface layer (b). The macrovoid layer has a partition wall joined to the surface layers (a) and (b) and a plurality of macrovoids surrounded by the partition wall and the surface layers (a) and (b). The surface layer (a) and the surface layer (b) have pores connected to the macrovoids.

公开(公告)号：CA3031920A1

公开(公告)日：2018-02-01

申请号：CA3031920

申请日：2017-07-25

Applicant: UBE INDUSTRIES

Inventor： OHYA SHUSEI ,  MATSUO MAKOTO ,  FUJII YUUICHI ,  BAMBA KEITA

IPC: C08J9/28 ,  C08G73/10

Abstract: The present invention pertains to a porous polyimide film production method and a porous polyimide film produced using said method, said method including: a step (1) in which a polyamic acid solution comprising 40%-97% by mass organic polar solvent and 3%-60% by mass polyamic acid having an intrinsic viscosity, comprising tetracarboxylic acid units and diamine units, of 1.0-3.0 is cast in film form and immersed in or caused to come in contact with a coagulating solvent having water as an essential component thereof, and a porous film of polyamic acid is produced; and a step (2) in which the porous film of polyamic acid obtained in said step is heat treated and imidized. Shrinkage in the film longitudinal direction and transverse direction after heat treatment is suppressed to no more than 8% for each direction and the speed of temperature increase in a temperature range of at least 200°C during the heat treatment is at least 25°C/min.

公开(公告)号：CA3031920C

公开(公告)日：2021-04-13

申请号：CA3031920

申请日：2017-07-25

Applicant: UBE INDUSTRIES

Inventor： OHYA SHUSEI ,  MATSUO MAKOTO ,  FUJII YUUICHI ,  BAMBA KEITA

IPC: C08J9/28 ,  C08G73/10

Abstract: The present invention pertains to a porous polyimide film production method and a porous polyimide film produced using said method, said method including: a step (1) in which a polyamic acid solution comprising 40%-97% by mass organic polar solvent and 3%-60% by mass polyamic acid having an intrinsic viscosity, comprising tetracarboxylic acid units and diamine units, of 1.0-3.0 is cast in film form and immersed in or caused to come in contact with a coagulating solvent having water as an essential component thereof, and a porous film of polyamic acid is produced; and a step (2) in which the porous film of polyamic acid obtained in said step is heat treated and imidized. Shrinkage in the film longitudinal direction and transverse direction after heat treatment is suppressed to no more than 8% for each direction and the speed of temperature increase in a temperature range of at least 200°C during the heat treatment is at least 25°C/min.

公开(公告)号：CA3031918A1

公开(公告)日：2018-02-01

申请号：CA3031918

申请日：2017-07-25

Applicant: UBE INDUSTRIES

Inventor： OHYA SHUSEI ,  MATSUO MAKOTO ,  BAMBA KEITA

IPC: C08J9/26 ,  B01D39/16 ,  B01D71/68

Abstract: Provided are: a porous polyether sulfone film having macrovoids and having excellent dimensional stability; and a production method therefor. Provided is a porous polyether sulfone film having a surface layer (a), a surface layer (b), and a macrovoid layer interposed between the surface layer (a) and the surface layer (b). The macrovoid layer has a partition wall joined to the surface layers (a) and (b) and a plurality of macrovoids surrounded by the partition wall and the surface layers (a) and (b). The surface layer (a) and the surface layer (b) have pores connected to the macrovoids.

公开(公告)号：SG11201900675WA

公开(公告)日：2019-02-27

申请号：SG11201900675W

申请日：2017-07-25

Applicant: UBE INDUSTRIES

Inventor： OHYA SHUSEI ,  MATSUO MAKOTO ,  BAMBA KEITA

IPC: C08J9/26 ,  B01D39/16 ,  B01D71/68

Abstract: POROUS POLYETHER SULFONE FILM AND PRODUCTION METHOD THEREFOR Provided are: a porous polyether sulfone film having macrovoids and having excellent 5 dimensional stability; and a production method therefor. Provided is a porous polyether sulfone film having a surface layer (a), a surface layer (b), and a macrovoid layer interposed between the surface layer (a) and the surface layer (b). The macrovoid layer has a partition wall joined to the surface layers (a) and (b) and a plurality of macrovoids surrounded by the partition wall and the surface layers (a) and (b). The surface layer (a) and the surface layer (b) have pores connected to 10 the macrovoids. [FIG. 1]

公开(公告)号：SG11201900719UA

公开(公告)日：2019-02-27

申请号：SG11201900719U

申请日：2017-07-25

Applicant: UBE INDUSTRIES

Inventor： OHYA SHUSEI ,  MATSUO MAKOTO ,  FUJII YUUICHI ,  BAMBA KEITA

IPC: C08J9/28 ,  C08G73/10

Abstract: POROUS POLYIMIDE FILM PRODUCTION METHOD AND POROUS POLYIMIDE FILM PRODUCED USING SAID METHOD 5 The present invention pertains to a porous polyimide film production method and a porous polyimide film produced using said method, said method including: a step (1) in which a poly(amic acid) solution comprising 40%-97% by mass organic polar solvent and 3%-60% by mass poly(amic acid) having an intrinsic viscosity, comprising tetracarboxylic acid units and diamine units, of 1.0-3.0 is cast in film form and immersed in or caused to come in contact with 10 a coagulating solvent having water as an essential component thereof, and a porous film of poly(amic acid) is produced; and a step (2) in which the porous film of poly(amic acid) obtained in said step is heat treated and imidized. Shrinkage in the film longitudinal direction and transverse direction after heat treatment is suppressed to no more than 8% for each direction and the speed of temperature increase in a temperature range of at least 200 C during the heat 15 treatment is at least 25 C/min. [FIG. 1]