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    RETARDER
    64.
    发明申请
    RETARDER 审中-公开

    公开(公告)号：US20200333521A1

    公开(公告)日：2020-10-22

    申请号：US16765400

    申请日：2018-11-19

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Stephen A. Johnson ,  Derek W. Patzman ,  Richard Y. Liu ,  Victor Ho ,  John F. Van Derlofske, III

    IPC: G02B5/30 ,  C08L67/02

    Abstract: A retarder including first and second outer layers and a birefringent layer disposed between and in direct contact with the first and second outer layers is described. The birefringent layer may include a first polyester having greater than 45 mole percent naphthalate units and greater than 45 mole percent ethylene units. Each of the first and second outer layers includes a second polyester which may include 40 to 50 mole percent naphthalate units, at least 25 mole percent ethylene units, and 10 to 25 mole percent of branched or cyclic C4-C10 alkyl units. The retarder has a retardance in a range of 1 micrometer to 100 micrometers.

    COEXTRUDED POLYMER FILM CONFIGURED FOR SUCCESSIVE IRREVERSIBLE DELAMINATION
    65.
    发明申请
    COEXTRUDED POLYMER FILM CONFIGURED FOR SUCCESSIVE IRREVERSIBLE DELAMINATION 审中-公开

    公开(公告)号：US20190248117A1

    公开(公告)日：2019-08-15

    申请号：US16390621

    申请日：2019-04-22

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Stephen A. Johnson ,  Onur S. Yordem ,  Timothy J. Lindquist ,  Terence D. Neavin

    IPC: B32B27/08 ,  B29C55/12 ,  B32B27/32 ,  B32B7/06 ,  B32B27/36 ,  B29D7/01

    Abstract: Multilayered polymer films are configured so that successive constituent layer packets can be delaminated in continuous sheet form from the remaining film. The new films are compatible with known coextrusion manufacturing techniques, and can also be made without the use of adhesive layers between layer packets that are tailored to be individually peelable from the remainder of the film. Instead, combinations of polymer compositions are used to allow non-adhesive polymer layers to be combined in such a way that delamination of the film is likely to occur along a plurality of delamination surfaces corresponding to interfaces between particular pairs of layers for which the peel strength is reduced relative to the peel strength at other layer interfaces within the film. The absence of an adhesive between peelable layer packets results in the delamination being irreversible.

    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION
    66.
    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).

    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION
    67.
    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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