公开(公告)号：US20220275159A1

公开(公告)日：2022-09-01

申请号：US17625302

申请日：2020-06-30

Applicant: TOYOBO CO., LTD.

Inventor： Yohei YAMAGUCHI ,  Kokichi TOKUO ,  Shotaro NISHIO ,  Kiwamu KAWAI

IPC: C08J7/04 ,  H04M1/02 ,  C08J5/18 ,  C08J7/043 ,  C09D5/00 ,  C09D7/61 ,  C09D7/40 ,  C09D7/45 ,  C09D7/65 ,  C09D175/04 ,  C09D167/02

Abstract: Provided is a hard coating film for foldable displays that does not form creases or cracks in the folding portion, and that is also excellent in reducing iridescent colors (interference mottling) caused by fine cracks in an easy-to-adhere resin layer or other layers. The hard coating film for a foldable display contains a polyester film having a thickness of 10 to 80 μm, an easy-to-adhere resin layer, and a hard coating layer, the easy-to-adhere resin layer and the hard coating layer being stacked in this order on at least one surface of the polyester film, wherein the easy-to-adhere resin layer is a cured product of a composition containing a binder resin and at least one type of particles selected from the group consisting of titanium oxide particles, zirconium oxide particles, and silica particles, the at least one type of particles have a mean particle size of 5 to 150 nm, and the polyester film having the easy-to-adhere resin layer stacked thereon but not yet having the hard coating layer stacked thereon satisfies specific conditions.

公开(公告)号：US20250129220A1

公开(公告)日：2025-04-24

申请号：US18694320

申请日：2022-09-30

Applicant: TOYOBO CO., LTD.

Inventor： Kiwamu KAWAI ,  Akira SHIMIZU ,  Kenji YOSHINO

IPC: C08J5/18 ,  C08J7/04 ,  C08J7/043 ,  C08K3/08

Abstract: Provided is a biaxially oriented polyester film in which poor flatness that may be caused during heat processing is suppressed. In the biaxially oriented polyester film, the content rate of an ester constituting unit derived from an isophthalic acid component is 0.5-5.0 mol % with respect to 100 mol % of all ester constituting units, the amount of change in haze of the film is 5.0% or less, the intrinsic viscosity of constitutional polyester resins is 0.59-0.65 dl/g, the average value of storage moduli is 5.0-7.6×108 [Pa], the acid value of the film is 40-60 eq/ton, and the relational expression is satisfied: X×(Ymax3−Ymin3)≤0.0591×(X×Ymin3)+0.005, where X is the storage modulus at 170° C., and Y is the film thickness per 1000 mm in the transverse direction with Ymax as the maximum value and Ymin as the minimum value.

公开(公告)号：US20220252763A1

公开(公告)日：2022-08-11

申请号：US17614201

申请日：2020-05-14

Applicant: TOYOBO CO., LTD.

Inventor： Shotaro NISHIO ,  Kiwamu KAWAI ,  Akira SHIMIZU

IPC: G02B1/14 ,  G02B1/04 ,  H01L51/52 ,  H04M1/02 ,  C09J7/25 ,  C09J7/29

Abstract: Provided are a polyester film, a laminated film, and the like for protecting an organic EL module of a foldable display each of which is free of occurrence of a crack at a folding portion thereof, in order to provide a foldable display excellent in mass productivity, and free of a risk of causing distortion in an image displayed at a folding portion thereof after being repeatedly folded. The polyester film for protecting an organic EL module of a foldable display satisfies the following conditions: (1) a refractive index in a bending direction is from 1.590 to 1.620; (2) a refractive index in a folding portion direction is from 1.670 to 1.700; (3) a refractive index in a thickness direction is 1.520 or less; and (4) a density is 1.380 g/cm3 or more, wherein the bending direction refers to a direction orthogonal to a folding portion of the polyester film at a time when the polyester film is folded.

公开(公告)号：US20240276862A1

公开(公告)日：2024-08-15

申请号：US18643154

申请日：2024-04-23

Applicant: TOYOBO CO., LTD.

Inventor： Shotaro NISHIO ,  Kiwamu KAWAI ,  Akira SHIMIZU ,  Katsuya ITO

IPC: H10K77/10 ,  B32B7/023 ,  B32B7/12 ,  B32B27/34 ,  H10K102/00

CPC classification number: H10K77/111 ,  B32B7/023 ,  B32B7/12 ,  B32B27/34 ,  B32B2255/10 ,  B32B2457/20 ,  H10K2102/311

Abstract: Provided is a polyester film for foldable displays that is unlikely to have cracks in the folding portion with the aim of providing a foldable display that is excellent in mass production applicability, and that does not have image distortion that may appear in the folding portion after the display is repeatedly folded. The polyester film has a thickness of 10 to 80 μm, a refractive index in the bending direction of 1.590 to 1.620, a refractive index in the direction of a folding portion of 1.670 to 1.700, a refractive index in the thickness direction of 1.520 or less, and a density of 1.380 g/cm3 or more, wherein the bending direction refers to a direction orthogonal to the folding portion of the polyester film to be folded.

公开(公告)号：US20230374234A1

公开(公告)日：2023-11-23

申请号：US18044845

申请日：2021-09-29

Applicant: TOYOBO CO., LTD.

Inventor： Kiwamu KAWAI ,  Akira SHIMIZU ,  Isao TAKII

IPC: C08J5/18 ,  C08J7/043 ,  C09J7/25 ,  C09J7/29 ,  C09J201/00

CPC classification number: C08J5/18 ,  C08J7/043 ,  C09J7/255 ,  C09J7/29 ,  C09J201/00 ,  C08J2367/02 ,  C09J2467/006 ,  C08J2400/00 ,  G09F2003/023

Abstract: The invention provides a biaxially oriented polyester film with a good balance among moldability during hot molding, film strength and elasticity, while suppressing deposition of an oligomer (whitening) due to heating in a coating step of an adhesive resin or the like during the molding process, and which can be used to provide a molded body, a label or the like. The biaxially oriented polyester film has a content of an ester constituent unit derived from an isophthalic acid component relative to 100% by mole of all ester constituent units in the constituent polyester resin of 0.5-5.0% by mole; a haze change when heated at 150° C. for 30 minutes of 5.0% or less; a limiting viscosity of the constituent polyester resin of 0.59-0.65 dl/g; an average storage elastic modulus at 150° C. of 5.0-7.6×108 (Pa); and an acid value of 40-60 eq/ton.

公开(公告)号：US20220389269A1

公开(公告)日：2022-12-08

申请号：US17625291

申请日：2020-06-30

Applicant: TOYOBO CO., LTD.

Inventor： Yohei YAMAGUCHI ,  Kokichi TOKUO ,  Shotaro NISHIO ,  Kiwamu KAWAI

IPC: C09D167/02 ,  C09D7/61 ,  C09D7/63 ,  G02B1/14

Abstract: Provided is a hard coating film for foldable displays that does not form creases or cracks in the folding portion, and that is also excellent in reducing iridescent colors (interference mottling) caused by fine cracks in an easy-to-adhere resin layer or other layers. The hard coating film for foldable displays contains a polyester film having a thickness of 10 to 80 μm, an easy-to-adhere resin layer, and a hard coating layer, the easy-to-adhere resin layer and the hard coating layer being stacked in this order on at least one surface of the polyester film, wherein the easy-to-adhere resin layer is a cured product of a composition containing at least one compound selected from the group consisting of titanium compounds and zirconium compounds and a polyester resin, and the polyester film having the easy-to-adhere resin layer stacked thereon but not yet having the hard coating layer stacked thereon satisfies characteristics within specific ranges.

公开(公告)号：US20220085307A1

公开(公告)日：2022-03-17

申请号：US17429119

申请日：2020-01-15

Applicant: TOYOBO CO., LTD.

Inventor： Shotaro NISHIO ,  Kiwamu KAWAI ,  Akira SHIMIZU ,  Katsuya ITO

IPC: H01L51/00 ,  B32B7/12 ,  B32B27/34 ,  B32B7/023

Abstract: Provided is a polyester film for foldable displays that is unlikely to have cracks in the folding portion with the aim of providing a foldable display that is excellent in mass production applicability, and that does not have image distortion that may appear in the folding portion after the display is repeatedly folded. The polyester film has a thickness of 10 to 80 μm, a refractive index in the bending direction of 1.590 to 1.620, a refractive index in the direction of a folding portion of 1.670 to 1.700, a refractive index in the thickness direction of 1.520 or less, and a density of 1.380 g/cm3 or more, wherein the bending direction refers to a direction orthogonal to the folding portion of the polyester film to be folded.

公开(公告)号：US20210179794A1

公开(公告)日：2021-06-17

申请号：US17048376

申请日：2019-04-03

Applicant: TOYOBO CO., LTD.

Inventor： Kenji YOSHINO ,  Kiwamu KAWAI ,  Shotaro NISHIO

IPC: C08J7/046 ,  C08J5/18 ,  C08J7/043 ,  G02B1/14 ,  G09F9/30 ,  G06F1/16

Abstract: Provided are a foldable display that is excellent in mass production applicability, and that does not have image distortion that can appear in the folding portion after the display is repeatedly folded; and a mobile device equipped with such a foldable display. Provided are a polyester film for surface protection films and a hard coating film for surface protection films for the foldable display and mobile device. The polyester film is for foldable display surface protection films, wherein the polyester film is cut in sheet form, the polyester film has a thickness of 10 to 75 μm, the polyester film has an intrinsic viscosity of 0.55 to 0.65 dl/g, and the amount of rise of a cut plane on at least one side of one or more cut end portions is 35 μm or less. The hard coating film, the foldable display, and the mobile device use the polyester film for foldable display surface protection films.

公开(公告)号：US20230122628A1

公开(公告)日：2023-04-20

申请号：US17905952

申请日：2021-03-02

Applicant: TOYOBO CO., LTD.

Inventor： Mei MATSUMURA ,  Shotaro NISHIO ,  Kiwamu KAWAI

IPC: C09J7/25 ,  C09J7/29 ,  C09J7/38 ,  G02B1/14 ,  H04M1/02

Abstract: Problem: An object of the present invention is to provide a polyester film for a foldable display, the film having a hold angle in a bending direction of 155° or more and a maximum heat shrinkage at 150° C. of 1.5% or less (wherein the hold angle refers to an angle of a crease after fixing the film at room temperature for 72 hours in such a manner that a strain of 1.7% is applied to both surfaces of a bent portion of the film, and the bending direction refers to a direction that is orthogonal to a folding portion of a foldable display produced using the film.

公开(公告)号：US20220246069A1

公开(公告)日：2022-08-04

申请号：US17614260

申请日：2020-05-14

Applicant: TOYOBO CO., LTD.

Inventor： Shotaro NISHIO ,  Kiwamu KAWAI ,  Mei MATSUMURA ,  Akira SHIMIZU

IPC: G09F9/30 ,  C08J7/044 ,  C08J7/046 ,  G06F3/041

Abstract: Provided is a transparent conductive polyester film for a foldable display which is free of occurrence of a fold mark or a tear at a folding portion thereof to be used in a foldable display excellent in mass productivity, and free of a risk of causing distortion in an image displayed at a folding portion thereof, and a mobile device. The transparent conductive polyester film for a foldable display includes: a polyester film; and a transparent conductive layer laminated on at least one surface of the polyester film, wherein the polyester film satisfies the following conditions: (1) a refractive index in a bending direction is from 1.590 to 1.620; (2) a refractive index in a folding portion direction is from 1.670 to 1.700; (3) a refractive index in a thickness direction is 1.520 or less; and (4) a density is 1.380 g/cm3 or more, wherein the bending direction refers to a direction orthogonal to a folding portion of the polyester film at a time when the polyester film is folded.