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    Synthetic polymer film and production method of synthetic polymer film
    1.
    发明授权
    Synthetic polymer film and production method of synthetic polymer film 有权

    公开(公告)号：US11364673B2

    公开(公告)日：2022-06-21

    申请号：US16280543

    申请日：2019-02-20

    Applicant: SHARP KABUSHIKI KAISHA

    Inventor： Miho Yamada ,  Yasuhiro Shibai ,  Kiyoshi Minoura ,  Tokio Taguchi

    IPC: B29C59/00 ,  B29C33/38 ,  C08K5/5397 ,  C08L71/02 ,  B29C33/56 ,  B29C59/16 ,  B29C33/42 ,  B32B3/26

    Abstract: A synthetic polymer film whose surface has a plurality of raised or recessed portions, wherein a two-dimensional size of the plurality of raised or recessed portions is in a range of not less than 0.5 μm and not more than 3 μm when viewed in a normal direction of the synthetic polymer film, the synthetic polymer film has a crosslink structure and contains an organic carboxylic acid, at the lapse of 5 minutes since placing a 200 μL drop of water on the surface of the synthetic polymer film, a pH of an aqueous solution is less than 4, and an area equivalent circle diameter of the aqueous solution is not less than 20 mm, and at the lapse of 60 seconds since placing a drop of water on the surface of the synthetic polymer film, a static contact angle of the water drop with respect to the surface is less than 3°.

    Antifouling film
    3.
    发明授权
    Antifouling film 有权

    公开(公告)号：US10976475B1

    公开(公告)日：2021-04-13

    申请号：US16326630

    申请日：2017-06-28

    Applicant: SHARP KABUSHIKI KAISHA

    Inventor： Yasuhiro Shibai ,  Ken Atsumo ,  Kenichiro Nakamatsu

    IPC: G02B1/18 ,  B32B3/30 ,  B32B27/30 ,  G02B1/118 ,  B32B27/18

    Abstract: The antifouling film includes a substrate, and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with multiple projections at a pitch not longer than a wavelength of visible light. The polymer layer is a cured product of a polymerizable composition, the polymerizable composition containing, in terms of active constituents, 15 to 40 wt % of an urethane acrylate containing six or more functional groups, 35 to 60 wt % of a multifunctional acrylate containing four or more functional groups and 3 to 15 ethylene oxide groups for each functional group, 15 to 30 wt % of a monofunctional acrylate with no ethylene oxide group, 0.5 to 10 wt % of a fluorine release agent containing a perfluoropolyether group and having a fluorine atom concentration of 50 wt % or lower, and 0.5 to 5 wt % of a polymerization initiator.

    Decorative film
    5.
    发明授权
    Decorative film 有权

    公开(公告)号：US10752742B2

    公开(公告)日：2020-08-25

    申请号：US16488257

    申请日：2017-10-13

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Yasuhiro Shibai ,  Ken Atsumo ,  Tokio Taguchi

    IPC: C08J5/18 ,  B32B3/30 ,  B32B27/08 ,  B32B27/18 ,  B32B27/30 ,  B32B27/36 ,  C08L35/02

    Abstract: A decorative film includes: a substrate; and a polymer layer including on a surface thereof an uneven structure provided with projections at a pitch not longer than a wavelength of visible light. The substrate contains a polycarbonate at least in its surface close to the polymer layer. The polymer layer is a cured product of a polymerizable composition. The polymerizable composition contains a release agent, a polyfunctional acrylate containing one or both of an ethylene oxide group and a propylene oxide group, and 2-(2-vinyloxyethoxy)ethyl acrylate. The polymerizable composition contains, in terms of active components, given proportions of the release agent and the 2-(2-vinyloxyethoxy)ethyl acrylate. The polymerizable composition contains, in terms of active components, a given total amount of the ethylene oxide group and the propylene oxide group in the polyfunctional acrylate and the 2-(2-vinyloxyethoxy)ethyl acrylate.

    Method for producing optical member and optical member
    7.
    发明授权
    Method for producing optical member and optical member 有权

    公开(公告)号：US10996377B2

    公开(公告)日：2021-05-04

    申请号：US16078210

    申请日：2017-02-15

    Applicant: SHARP KABUSHIKI KAISHA

    Inventor： Yasuhiro Shibai ,  Ken Atsumo ,  Hidekazu Hayashi

    IPC: B32B27/30 ,  G02B1/118 ,  B32B3/30 ,  B32B27/00 ,  B32B23/08 ,  B32B27/16 ,  B32B27/22

    Abstract: The method for producing an optical member of the present invention includes: a step (1) of applying a lower layer resin and an upper layer resin; a step (2) of pressing a die against the lower layer resin and the upper layer resin from the upper layer resin side, so as to form a resin layer including an uneven structure on a surface thereof; and a step (3) of curing the resin layer to form the polymer layer, wherein the lower layer resin contains an amide group, the lower layer resin has an amide group concentration of 1.5 mmol/g or more and less than 5 mmol/g, and the polymer layer has a minimum storage modulus E′ of 1×108 Pa or higher and 1×109 Pa or lower at a bottom temperature of 110° C. or higher and 210° C. or lower.

    Cover for endoscope distal end part and endoscope
    9.
    发明授权
    Cover for endoscope distal end part and endoscope 有权

    公开(公告)号：US12108933B2

    公开(公告)日：2024-10-08

    申请号：US17042876

    申请日：2019-03-20

    Applicant: SHARP KABUSHIKI KAISHA

    Inventor： Miho Yamada ,  Kiyoshi Minoura ,  Tokio Taguchi ,  Yasuhiro Shibai

    IPC: A61B1/00 ,  G02B1/118 ,  G02B1/18

    CPC classification number: A61B1/00096 ,  G02B1/118 ,  G02B1/18

    Abstract: An endoscope distal end cover (10) is a cover for protecting a distal end (20t) of an endoscope (20) which has an observation window at the distal end, including: a synthetic polymer film (13) which is to be located over the observation window (32) when the endoscope distal end cover is attached to the distal end of the endoscope, wherein the synthetic polymer film has a surface which includes a plurality of raised portions, when viewed in a normal direction of the synthetic polymer film, a two-dimensional size of the plurality of raised portions is in the range of more than 20 nm and less than 500 nm, and a static contact angle of water with respect to the surface is not less than 150°, and a static contact angle of hexadecane with respect to the surface is not less than 60°.

    Optical member and polymer layer
    10.
    发明授权
    Optical member and polymer layer 有权

    公开(公告)号：US10947411B2

    公开(公告)日：2021-03-16

    申请号：US16061474

    申请日：2016-12-08

    Applicant: SHARP KABUSHIKI KAISHA

    Inventor： Yasuhiro Shibai ,  Ken Atsumo ,  Hidekazu Hayashi ,  Nobuaki Yamada

    IPC: C09D177/06 ,  C08J5/18 ,  C09D133/08 ,  G02B1/04 ,  G02B1/118 ,  C09D133/26 ,  C08F220/00 ,  C09D133/14 ,  B32B3/30 ,  C08F20/56

    Abstract: The optical member of the present invention includes a substrate and a polymer layer that is in direct contact with the substrate and includes on a surface thereof an uneven structure provided with multiple projections at a pitch not longer than a wavelength of visible light, the polymer layer containing an amide group, the polymer layer having an amide group concentration of 2 mmol/g or higher and lower than 5 mmol/g, the polymer layer having a minimum storage modulus E′ of 1×108 Pa or higher and 1×109 Pa or lower at a bottom temperature of 110° C. or higher and 210° C. or lower in a dynamic viscoelasticity measurement with a measurement temperature range of −50° C. to 250° C., a temperature rise rate of 5° C./min, and a frequency of 10 Hz.

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