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    EFFECTIVE MEDIA RETARDER FILMS WITH SPATIALLY SELECTIVE BIREFRINGENCE REDUCTION
    11.
    发明申请
    EFFECTIVE MEDIA RETARDER FILMS WITH SPATIALLY SELECTIVE BIREFRINGENCE REDUCTION 有权
    有效的介质延迟膜与空间选择性减少

    公开(公告)号：US20150277013A1

    公开(公告)日：2015-10-01

    申请号：US14735758

    申请日：2015-06-10

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： William W. Merrill ,  Douglas Scott Dunn ,  David T. Yust

    IPC: G02B5/30

    CPC classification number: G02B5/3083 ,  B29D11/00644 ,  B29D11/0073 ,  B42D25/29 ,  B42D25/351 ,  B42D25/45 ,  G02B5/32 ,  G02F1/13363 ,  G02F2413/09

    Abstract: A retarder film provides a first light retardation and can be heat processed in one or more selected areas to provide a second light retardation in the selected area(s). The retarder film may have an absorption characteristic such that the heat processing can be carried out by selectively exposing the film to a suitable radiant beam. The retarder film is composed of a stack of contiguous ultrathin layers configured to provide an effective optical medium for visible light. Visible light propagates through the stack as an effective medium having effective refractive indices along principal x-, y-, and z-axes. At least some of the ultrathin layers possess intrinsic birefringence, and the effective indices of the stack are functions of the intrinsic refractive indices of the constituent ultrathin layers. The heat processing is carried out so that the ultrathin layer stack structural integrity is not substantially altered in the processed area(s).

    Abstract translation: 延迟膜提供第一光延迟并且可以在一个或多个选定区域中进行热处理以在所选择的区域中提供第二光延迟。 延迟膜可以具有吸收特性，使得可以通过将膜选择性地暴露于合适的辐射束来进行热处理。 延迟膜由连续的超薄层的叠层组成，其被配置为提供可见光的有效光学介质。 可见光通过堆叠传播，作为沿着主要x轴，y轴和z轴具有有效折射率的有效介质。 至少一些超薄层具有固有的双折射，并且叠层的有效折射率是组成超薄层的固有折射率的函数。 进行热处理，使得超薄层堆叠结构完整性在经处理的区域中基本上不改变。

    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION
    17.
    发明申请
    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION 审中-公开

    公开(公告)号：US20190204493A1

    公开(公告)日：2019-07-04

    申请号：US16296883

    申请日：2019-03-08

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Michael Benton Free ,  Martin B. Wolk ,  Rolf W. Biernath ,  Stephen A. Johnson ,  William W. Merrill ,  William F. Edmonds ,  Claire A. Jalbert

    IPC: G02B5/30 ,  G02B5/08 ,  G02B5/28

    CPC classification number: G02B5/3083 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/305

    Abstract: A multilayer optical film has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film. Heating element(s) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered region(s) of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered region(s) to pattern the film. The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g. reduce) the birefringence of the birefringent microlayers disposed near the outer exposed surface in the altered region(s), while providing sufficient mechanical support to avoid substantial layer distortion of the microlayers near the outer exposed surface in the altered region(s).

    ORIENTED POLYLACTIC ACID POLYMER BASED FILM
    18.
    发明申请
    ORIENTED POLYLACTIC ACID POLYMER BASED FILM 审中-公开

    公开(公告)号：US20190136045A1

    公开(公告)日：2019-05-09

    申请号：US16099741

    申请日：2017-05-04

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： William W. Merrill ,  Jeffrey P. Kalish ,  Pamela A. Percha ,  Derek J. Dehn ,  Bradley L. Givot ,  Ignatius A. Kadoma

    IPC: C08L67/04 ,  C08J5/18 ,  C08J7/04 ,  B32B27/08 ,  B32B27/36

    Abstract: In one embodiment, a film is described comprising a mixture of semicrystalline polylactic acid polymer; polyvinyl acetate polymer having a glass transition temperature (Tg) midpoint as measured by differential scanning calorimetry of at least 25° C.; and plasticizer; wherein the film is oriented. In another embodiment, a film is described comprising a mixture comprising semicrystalline polylactic acid polymer, polymer having a midpoint Tg as measured by differential scanning calorimetry of at least 25° C., and plasticizer; wherein the mixture exhibits a single midpoint Tg and the single midpoint Tg ranges from 40° C. to 65° C.; and wherein the film is oriented and the oriented film exhibits a higher midpoint Tg ranging from 40° C. to 65° C. and a lower midpoint Tg ranging from 5 to 25° C.

    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION
    19.
    发明申请
    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION 审中-公开

    公开(公告)号：US20180128954A1

    公开(公告)日：2018-05-10

    申请号：US15864888

    申请日：2018-01-08

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Michael Benton Free ,  Martin B. Wolk ,  Rolf W. Biernath ,  Stephen A. Johnson ,  William W. Merrill ,  William F. Edmonds ,  Claire A. Jalbert

    IPC: G02B5/30 ,  G02B5/08 ,  G02B5/28

    CPC classification number: G02B5/3083 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/305

    Abstract: A multilayer optical film has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film. Heating element(s) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered region(s) of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered region(s) to pattern the film. The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g. reduce) the birefringence of the birefringent microlayers disposed near the outer exposed surface in the altered region(s), while providing sufficient mechanical support to avoid substantial layer distortion of the microlayers near the outer exposed surface in the altered region(s).

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