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    Patterned marking of multilayer optical film by thermal conduction
    11.
    发明授权
    Patterned marking of multilayer optical film by thermal conduction 有权

    公开(公告)号：US10254460B2

    公开(公告)日：2019-04-09

    申请号：US16030109

    申请日：2018-07-09

    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

    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).

    Tear resistant multilayer film
    13.
    发明授权
    Tear resistant multilayer film 有权

    公开(公告)号：US10040272B2

    公开(公告)日：2018-08-07

    申请号：US15692162

    申请日：2017-08-31

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Richard Y. Liu ,  Stephen A. Johnson ,  John P. Purcell

    IPC: B32B7/12 ,  B32B17/00 ,  B32B27/08 ,  B32B27/36 ,  B29C47/06 ,  C08L67/03 ,  B29C47/00 ,  B32B17/06 ,  C08L1/00 ,  B29K67/00 ,  B29L9/00 ,  C09J7/25

    Abstract: A tear resistant multilayer film including pluralities of first and second layers is described. The first layers include a first polymer and the second layers include a second polymer. The first polymer is polyethylene terephthalate or a first ester block copolymer that includes polyethylene terephthalate blocks at a weight percent of the first ester block copolymer of at least 50 percent and further includes glycol-modified polyethylene terephthalate blocks. The second polymer is sebacic acid-substituted polyethylene terephthalate or a second ester block copolymer that includes sebacic acid-substituted polyethylene terephthalate blocks at a weight percent of the second ester block copolymer of at least 50 percent and further includes polyethylene terephthalate blocks or glycol-modified polyethylene terephthalate blocks. The tear resistant multilayer film includes a total of 6 to 300 first and second layers.

    Multilayer Optical Film
    17.
    发明公开
    Multilayer Optical Film 审中-公开

    公开(公告)号：US20240201427A1

    公开(公告)日：2024-06-20

    申请号：US18555741

    申请日：2022-04-05

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Lin Zhao ,  Gilles J. Benoit ,  Stephen A. Johnson

    IPC: G02B5/26 ,  G02B5/30

    CPC classification number: G02B5/26 ,  G02B5/3083

    Abstract: A multilayer optical film includes a plurality of polymeric first layers numbering at least 10 in total where each of the first layers has an average thickness less than about 500 nm. For a p-polarized incident light, and for each of a first incident angle and a second incident angle greater than the first incident angle by at least about 40 degrees: a reflectance of each of the optical film and the plurality of polymeric first layers versus wavelength has a reflection band having a left band edge (LBE) at a short wavelength side of the reflection band and a right band edge (RBE) at a long wavelength side of the reflection band. A separation between the RBEs is less than a separation between the LBEs for the first incident angle, and a separation between the RBEs is greater than a separation between the LBEs for the second incident angle.

    Retarder
    19.
    发明授权
    Retarder 有权

    公开(公告)号：US11016231B2

    公开(公告)日：2021-05-25

    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.

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