Article and methods of making the same

    公开(公告)号:US11493673B2

    公开(公告)日:2022-11-08

    申请号:US16622991

    申请日:2018-06-20

    Abstract: Article (9,19) comprising a substrate (10, 20) comprising a polymer and having first (11,21) and second (12, 22) opposed major surfaces. The first major surface (11, 21) has first surface regions (13, 23) with first nanoparticles (14a, 14b, 14c, 14d, 24a, 24b, 24c, 24d) partially embedded into the first major surface (11, 21), and one of •(a) second surface regions (15) free of nanoparticles; or •(b) second surface regions (25) with at least second nanoparticles (28) on the first major surface (11, 21) or partially embedded into the first major surface (11, 21). The first surface regions (13, 23) have a first average surface roughness, Ra1, of at least 20 nm, wherein the second surface regions (15, 25) have a second average surface roughness, Ra2, of less than 100 nm, wherein the first average surface roughness, Ra1, is greater than the second average surface roughness, Ra2, and wherein there is an absolute difference between the first and second average surface roughness of at least 10 nm.

    COATED MICROSTRUCTURED FILMS, METHODS OF MAKING SAME, AND METHODS OF MAKING LIGHT CONTROL FILMS

    公开(公告)号:US20250130352A1

    公开(公告)日:2025-04-24

    申请号:US18681559

    申请日:2022-08-15

    Abstract: The present disclosure provides a coated microstructured film (100a-c). The coated film includes microstructures (110) extending across a first surface of the microstructured film (100a-e) and a coating (130) on a first portion of at least some of the microstructures (110). The coating (130) includes one or more polyelectrolytes and has an average thickness T. A second portion of the coated microstructures either lacks the coating or has the coating with an average thickness of no more than 50% of T. The coating (130) is essentially free of any light absorptive material. A method of making the coated microstructured film (100a-c) is also provided. The method includes obtaining a microstructured film (100a), applying a coating (130) containing one or more polyelectrolytes to at least some of the microstructures (110), and removing at least some of the coating (130) from a second portion of the coated microstructures. Additionally, the present disclosure provides a method of making a light control film (110d. 100e). The method includes the above method as well as either infusing a light absorptive material into the coating of the coated microstructured film (100b-d) or applying a layer of a pigment on the coating. Such a light control film exhibits a transmission of visible light of 75% or greater at a viewing angle of 0 degrees.

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