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    Self-folding 3D film assemblies
    1.
    发明授权
    Self-folding 3D film assemblies 有权

    公开(公告)号：US12180068B2

    公开(公告)日：2024-12-31

    申请号：US17413773

    申请日：2019-12-24

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Jia Hu ,  Martin B. Wolk ,  Thomas R. Corrigan ,  Mitchell T. Nommensen ,  Michael Benton Free ,  Kurt J. Halverson

    IPC: B81C1/00 ,  B32B7/12 ,  B81B3/00 ,  B81B7/02 ,  C09J9/02

    Abstract: A substantially planar self-folding film assembly to generate a folded three-dimensional assembly. The assembly includes a flexible support substrate, adhesive elements, and folding members. The folding members include a base, a folding region, and a hinge adjacent each folding region attached at the base to the flexible support substrate by at least one of the adhesive elements. An array of polymer actuators is co-extensive, or shaped to be not co-extensive, with each of the flexible folding members. Upon activation by a patterned light to heat conversion layer, each polymer actuator is designed and configured to provide a displacement of the corresponding flexible folding member about each hinge.

    Article with microstructured layer
    2.
    发明授权
    Article with microstructured layer 有权

    公开(公告)号：US11407196B2

    公开(公告)日：2022-08-09

    申请号：US16066943

    申请日：2016-12-22

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Jeffrey L. Solomon ,  Michael Benton Free ,  Steven J. McMan ,  Martin B. Wolk ,  Elisa M. Cross

    IPC: B32B3/30 ,  B32B7/12 ,  B32B27/08 ,  B32B27/36 ,  G02B5/02 ,  B32B27/18 ,  B32B27/32 ,  B32B27/28 ,  B32B27/30 ,  B32B7/05 ,  B32B7/14 ,  B32B27/38 ,  B32B27/40 ,  B32B37/14 ,  G02F1/1335 ,  F21V8/00

    Abstract: Article comprising a first, microstructured layer comprising a first material, and having first and second opposed major surfaces, the first major surface being a microstructured surface, and the microstructured surface having peaks and valleys, wherein the peaks are microstructural features each having a height defined by the distance between the peak of the respective microstructural feature and an adjacent valley; and a second layer comprising at least one of a crosslinkable or crosslinked composition, wherein at least a portion of the second major surface of the second layer is directly attached to at least a portion of the first major surface of the first, microstructured layer. Articles described herein are useful, for example, for optical film applications. For example. An article including a regular prismatic microstructured pattern can act as a totally internal reflecting film for use as a brightness enchancement film; an article including a corner-cube prismatic microstructured pattern can act as a retroreflecting film or element for use as reflecting film when combined with a back reflector; and an article including a prismatic microstructured pattern can act as an optical turning film or element for use in an optical display.

    SELF-FOLDING 3D FILM ASSEMBLIES
    3.
    发明申请
    SELF-FOLDING 3D FILM ASSEMBLIES 有权

    公开(公告)号：US20220063991A1

    公开(公告)日：2022-03-03

    申请号：US17413773

    申请日：2019-12-24

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Jia Hu ,  Martin B. Wolk ,  Thomas R. Corrigan ,  Mitchell T. Nommensen ,  Michael Benton Free ,  Kurt J. Halverson ,  Erik A. Aho

    IPC: B81C1/00 ,  B81B3/00 ,  B81B7/02

    Abstract: A substantially planar self-folding film assembly to generate a folded three-dimensional assembly. The assembly includes a flexible support substrate, adhesive elements, and folding members. The folding members include a base, a folding region, and a hinge adjacent each folding region attached at the base to the flexible support substrate by at least one of the adhesive elements. An array of polymer actuators is co-extensive, or shaped to be not co-extensive, with each of the flexible folding members. Upon activation by a patterned light to heat conversion layer, each polymer actuator is designed and configured to provide a displacement of the corresponding flexible folding member about each hinge.

    Patterned marking of multilayer optical film by thermal conduction
    6.
    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).

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