公开(公告)号：US20210317337A1

公开(公告)日：2021-10-14

申请号：US17352429

申请日：2021-06-21

Applicant: NITTO DENKO CORPORATION

Inventor： Masayuki Okamoto ,  Satoshi Mita ,  Yoshimi Konno ,  Taiyan Jiang ,  Tetsuro Ikeda

IPC: C09J4/00 ,  G02B5/30 ,  G02F1/1335 ,  G02F1/13363 ,  C09J11/06 ,  G02B1/14 ,  C09J5/00 ,  C09J133/06 ,  C09J133/14 ,  C09J133/24 ,  C09J135/02

Abstract: An active-energy-ray-curable adhesive composition comprises at least radical polymerizable compounds. The radical polymerizable compounds comprise a component A having a log Pow of −2 to 2, and a component B having a log Pow more than 7, each of these log Pow values representing an octanol/water distribution coefficient. The component A preferably comprises at least one nitrogen-containing monomer selected from the group consisting of (meth)acrylamide derivatives, amino-group-containing monomers, and nitrogen-containing and heterocycle-containing vinyl monomers. The component B preferably comprises an alkyl (eth)acrylate having 18 to 20 carbon atoms.

公开(公告)号：US11137522B2

公开(公告)日：2021-10-05

申请号：US15515948

申请日：2015-09-29

Applicant: NITTO DENKO CORPORATION

Inventor： Satoshi Mita ,  Tomonori Ueno ,  Jingfan Xu ,  Yusuke Motegi ,  Atsushi Kishi

IPC: G02B1/14 ,  C08F222/10 ,  C09D129/04 ,  B32B7/12 ,  B32B37/12 ,  C09J129/04 ,  C09J133/02 ,  C09J163/00 ,  G02B5/30 ,  G02F1/1335 ,  C09J133/06 ,  B32B37/00

Abstract: The present invention pertains to a one-side-protected polarizing film having a protective film or films on only one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin, and is designed to have a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>−(100.929T−42.4−1)×100 (provided that T

公开(公告)号：US20200292738A1

公开(公告)日：2020-09-17

申请号：US16086076

申请日：2017-03-17

Applicant: NITTO DENKO CORPORATION

Inventor： Satoshi Mita ,  Tomonori Ueno ,  Jingfan Xu ,  Atsushi Kishi

IPC: G02B5/30 ,  G02B1/14

Abstract: A polarizing film is disclosed including a polarizer having a thickness of 10 μm or less, and a transparent resin layer on at least one surface of the polarizer, wherein the polarizer includes a polyvinyl alcohol-based resin, and has a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>−(100.929T-42.4−1)×100(provided that T

公开(公告)号：US20190136101A1

公开(公告)日：2019-05-09

申请号：US16094293

申请日：2017-03-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayuki Okamoto ,  Satoshi Mita ,  Yoshimi Konno ,  Taiyan Jiang ,  Tetsuro Ikeda

IPC: C09J139/04 ,  C09J133/06 ,  C09J133/14 ,  C09J5/00 ,  G02B1/14 ,  G02B5/30 ,  B32B7/12 ,  B32B37/12

Abstract: A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both surfaces of a polarizer, and transparent protective films. The adhesive layer (a) on/over one of both the surfaces has a glass transition temperature of −60° C. or higher and lower than 40° C. The adhesive layer (b) on/over the other surface has a glass transition temperature of 40° C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises, as radical polymerizable compounds, a component A having a logPow of −2 to 2, and a component B having a logPow more than 7, these logPow values being each an octanol/water distribution coefficient.

公开(公告)号：US20190129072A1

公开(公告)日：2019-05-02

申请号：US16086751

申请日：2017-03-16

Applicant: NITTO DENKO CORPORATION

Inventor： Tomonori Ueno ,  Satoshi Mita ,  Atsushi Kishi ,  Kentaro Ikeshima ,  Yusuke Motegi

IPC: G02B1/14 ,  B32B27/08 ,  B32B27/30 ,  B32B7/12 ,  G02B5/30

Abstract: A surface-protective film-attached polarizing film is disclosed which includes a polarizing film (A) having a thickness of 100 μm or less, and a surface-protective film (B) provided on at least one surface of the polarizing film (A), wherein the polarizing film (A) comprises a polarizer, and a protective film provided on at least one surface of the polarizer, the polarizer comprises a polyvinyl alcohol-based resin and has a thickness of 10 μm or less, the polarizing film (A) has a width WA, the surface-protective film (B) has a width WB, a difference between the widths WA and WB (WA−WB) is 3 mm or more, and a peel strength of the surface-protective film (B) to the polarizing film (A) is 0.2 N/25-mm or less. The surface-protective film-attached polarizing film allows to be restrained the polarizing film from being broken, when the surface-protective film is peeled from the polarizing film.

公开(公告)号：US20190025485A1

公开(公告)日：2019-01-24

申请号：US16070082

申请日：2017-01-12

Applicant: NITTO DENKO CORPORATION

Inventor： Satoshi Mita ,  Tomonori Ueno ,  Jingfan Xu ,  Yusuke Motegi ,  Atsushi Kishi

IPC: G02B5/30 ,  B32B7/12 ,  B32B27/30 ,  B32B27/18 ,  C08L29/04 ,  C08K3/38

Abstract: This pressure-sensitive-adhesive-layer-attached one-side-protected polarizing film has a polarizer that contains a polyvinyl alcohol-based resin, contains 20 wt % or less of boric acid relative to the total quantity of the polarizer, has a thickness of 10 μm or less, and has prescribed optical characteristics. The film thickness of the pressure-sensitive adhesive layer is less than 50 μm, and if the storage elastic modulus of the pressure-sensitive adhesive layer at 23° C. is termed G (Pa) and the film thickness of the pressure-sensitive adhesive layer is termed H (μm), G>210e0.2035H is satisfied when 50>H≥32, and G>35000e0.0433H is satisfied when 32>H>0. In this pressure-sensitive-adhesive-layer-attached one-side-protected polarizing film, the polarizer has prescribed optical characteristics, and defects resulting from through cracks and nano-slits can be suppressed.

公开(公告)号：US20170235023A1

公开(公告)日：2017-08-17

申请号：US15514710

申请日：2015-09-29

Applicant: NITTO DENKO CORPORATION

Inventor： Satoshi Mita ,  Tomonori Ueno ,  Yusuke Motegi ,  Yasutaka Ishihara ,  Ayami Nakato ,  Atsushi Kishi

IPC: G02B1/14 ,  G02F1/1335 ,  C09J7/02 ,  C09D129/04 ,  C09D7/12

CPC classification number: G02B1/14 ,  C08K3/38 ,  C09D129/04 ,  C09J7/29 ,  C09J133/26 ,  C09J2201/122 ,  C09J2201/606 ,  C09J2201/622 ,  C09J2203/318 ,  C09J2203/326 ,  C09J2429/006 ,  C09J2433/00 ,  C09J2467/00 ,  G02B5/3033 ,  G02F1/133528 ,  G02F2202/28

Abstract: A one-side-protected polarizing film having a transparent protective film on only one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 μm or less, and is designed to have a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>−(100.929T−42.4−1)×100 (provided that T

公开(公告)号：US11204447B2

公开(公告)日：2021-12-21

申请号：US16086751

申请日：2017-03-16

Applicant: NITTO DENKO CORPORATION

Inventor： Tomonori Ueno ,  Satoshi Mita ,  Atsushi Kishi ,  Kentaro Ikeshima ,  Yusuke Motegi

IPC: G02B1/14 ,  B32B27/30 ,  G02B5/30 ,  B32B7/12 ,  B32B27/08

Abstract: A surface-protective film attached polarizing film is disclosed which includes a polarizing film (A) having a thickness of 100 μm or less, and a surface-protective film (B) provided on at least one surface of the polarizing film (A), wherein the polarizing film (A) comprises a polarizer, and a protective film provided on at least one surface of the polarizer, the polarizer comprises a polyvinyl alcohol-based resin and has a thickness of 10 μm or less, the polarizing film (A) has a width WA, the surface-protective film (B) has a width WB, a difference between the widths WA and WB (WA−WB) is 3 mm or more, and a peel strength of the surface-protective film (B) to the polarizing film (A) is 0.2 N/25-mm or less. The surface-protective film-attached polarizing film allows to be restrained the polarizing film from being broken, when the surface-protective film is peeled from the polarizing film.

公开(公告)号：US10858553B2

公开(公告)日：2020-12-08

申请号：US16094293

申请日：2017-03-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayuki Okamoto ,  Satoshi Mita ,  Yoshimi Konno ,  Taiyan Jiang ,  Tetsuro Ikeda

IPC: C09J139/04 ,  B32B7/12 ,  C09J5/00 ,  C09J133/06 ,  C09J133/14 ,  B32B37/12 ,  G02B5/30 ,  G02B1/14 ,  G02F1/1335

Abstract: A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both surfaces of a polarizer, and transparent protective films. The adhesive layer (a) on/over one of both the surfaces has a glass transition temperature of −60° C. or higher and lower than 40° C. The adhesive layer (b) on/over the other surface has a glass transition temperature of 40° C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises, as radical polymerizable compounds, a component A having a logPow of −2 to 2, and a component B having a logPow more than 7, these logPow values being each an octanol/water distribution coefficient.

公开(公告)号：US10302829B2

公开(公告)日：2019-05-28

申请号：US15549788

申请日：2016-02-09

Applicant: NITTO DENKO CORPORATION

Inventor： Yusuke Motegi ,  Satoshi Mita ,  Tomonori Ueno ,  Atsushi Kishi ,  Jingfan Xu

IPC: G02B5/30 ,  B32B27/30

Abstract: The present invention pertains to a polarizing film having a transparent resin layer on at least one side of a polarizer containing a polyvinyl alcohol-based resin, wherein the transparent resin layer has a thickness of 0.2 μm or more and is formed from a layer-forming material containing a polyvinyl alcohol-based resin having a saponification degree of 96 mol % or more, and wherein the combined total content of sodium acetate and potassium acetate contained in the transparent resin layer is less than 1 wt %. This polarizing film has crack-resistant properties, and can minimize degradation of the optical characteristics in a heating and humidifying test.