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    RETROREFLECTIVE ARTICLE INCLUDING A CONFORMAL WAVELENGTH-SELECTIVE RADIATION ABSORBING COATING LAYER, AND METHODS OF MAKING SAME
    15.
    发明申请
    RETROREFLECTIVE ARTICLE INCLUDING A CONFORMAL WAVELENGTH-SELECTIVE RADIATION ABSORBING COATING LAYER, AND METHODS OF MAKING SAME 有权

    公开(公告)号：US20210364678A1

    公开(公告)日：2021-11-25

    申请号：US16963268

    申请日：2019-03-26

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Daniel J. Schmidt ,  Reema Chatterjee ,  Kui Chen-Ho ,  Benjamin R. Coonce

    IPC: G02B5/124 ,  G02B5/22

    Abstract: The present disclosure provides a retroreflective article. The retroreflective article includes a retroreflective layer including a number of cube corner elements that collectively form a structured surface that is opposite a major surface, and a conformal wavelength-selective radiation absorbing coating layer adjacent to the structured surface. The present disclosure also provides a method of making a retroreflective article. The method includes obtaining a retroreflective layer, and forming a conformal wavelength-selective radiation absorbing coating layer on the retroreflective layer by applying a first material having a first binding group to the structured surface, and applying a second material having a second binding group to the first material. The conformal wavelength-selective radiation absorbing coating layer absorbs radiation of at least one selected wavelength and can impart color (or absorption of at least one wavelength outside of the colored wavelength range) to retroreflective light of the retroreflective article.

    THERMOFORMED ABRASION-RESISTANT MULTILAYER OPTICAL FILM AND METHOD OF MAKING THE SAME
    16.
    发明申请
    THERMOFORMED ABRASION-RESISTANT MULTILAYER OPTICAL FILM AND METHOD OF MAKING THE SAME 有权

    公开(公告)号：US20210221080A1

    公开(公告)日：2021-07-22

    申请号：US17059843

    申请日：2019-05-30

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Benjamin R. Coonce ,  Richard J. Pokorny ,  Thomas P. Klun ,  Chunjie Zhang ,  Gregg A. Ambur ,  Benjamin G. Sonnek ,  Daniel J. Richter ,  Jung-Sheng Wu

    IPC: B29D11/00 ,  B29C51/26 ,  G02B1/14 ,  G02B1/08

    Abstract: A method of making a shaped abrasion-resistant multilayer optical film includes providing a curable composition comprising, based on the total weight of components a) to d) components: a) 87 to 96 weight percent of urethane (meth)acrylate compound having an average (meth)acrylate functionality of 2 to 4.8; b) 2 to 12.5 weight percent of (meth)acrylate monomer having a (meth)acrylate functionality of 1 to 2, wherein the (meth)acrylate monomer does not comprise a urethane (meth)acrylate compound; optionally c) 0.5 to 2 weight percent of silicone (meth)acrylate; and d) optional effective amount of photoinitiator. The curable composition is coated onto an MOF. Optionally, the curable composition to is at least partially dried. Next, the curable composition or the at least partially dried curable composition is at least partially cured to provide an abrasion-resistant multilayer optical film. Lastly, the abrasion-resistant multilayer optical film is thermoformed using a female mold having a mold surface. At least a portion of the mold surface has a radius of curvature of 58 to 76 mm and a maximum depth of 13 to 20 mm.

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