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    OPTICAL EFFECT LAYER
    2.
    发明申请
    OPTICAL EFFECT LAYER 有权
    光学效应层

    公开(公告)号：US20150146280A1

    公开(公告)日：2015-05-28

    申请号：US14399325

    申请日：2013-04-30

    Applicant: SICPA HOLDING SA

    Inventor： Pierre Degott ,  Mathieu Schmid ,  Claude Alain Despland ,  Cédric Amerasinghe

    IPC: G02B5/08 ,  B42D25/40 ,  B42D25/30 ,  G02F1/00 ,  G02F1/21

    CPC classification number: G02F1/09 ,  B05D3/20 ,  B05D5/06 ,  B05D5/065 ,  B41M3/14 ,  B42D25/00 ,  B42D25/20 ,  B42D25/24 ,  B42D25/29 ,  B42D25/30 ,  B42D25/369 ,  B42D25/378 ,  B42D25/40 ,  B42D2033/16 ,  B42D2033/18 ,  B42D2033/20 ,  B42D2035/20 ,  C09D11/037 ,  G02B5/0257 ,  G02B5/08 ,  G02F1/0036 ,  G02F1/21 ,  G02F2001/094 ,  G02F2001/213

    Abstract: The disclosure relates to the field of graphical elements and is directed to an optical effect layer (OEL), a device and a method for producing same. The disclosure provides an optical effect that is easy to detect as such and exhibits a viewing-angle dependent apparent motion of image features over an extended length if the viewing angle with respect to the OEL changes. An OEL includes a binder material being at least partially transparent and a plurality of particles dispersed within the layer. Each particle has a non-isotropic reflectivity and may be magnetic or magnetizable. The orientation of the particles forms an orientation pattern extending over a length within an extended surface of the OEL, such that the local average of an angle between (i) a straight line along an observed longest dimension within the corresponding cross-section shape, and (ii) said first direction x varies according to a function (θ) of a position (P) along said first direction.

    Abstract translation: 本公开涉及图形元素的领域，并且涉及光学效应层（OEL），装置及其制造方法。 本公开提供了如此容易检测的光学效果，并且如果相对于OEL的视角改变，则呈现出视角依赖的视觉特征在延长长度上的视在运动。 OEL包括至少部分透明的粘合剂材料和分散在该层内的多个颗粒。 每个颗粒具有非各向同性的反射率，并且可以是磁性的或可磁化的。 颗粒的取向形成在OEL的延伸表面内的长度上延伸的取向图案，使得（i）在相应横截面形状内沿着观察到的最长尺寸的直线之间的角度的局部平均值，以及 （ii）所述第一方向x根据沿着所述第一方向的位置（P）的函数（“θ”）而变化。

    Magnetic or magnetisable pigment particles and optical effect layers
    4.
    发明授权
    Magnetic or magnetisable pigment particles and optical effect layers 有权

    公开(公告)号：US10279618B2

    公开(公告)日：2019-05-07

    申请号：US14910091

    申请日：2014-07-25

    Applicant: SICPA HOLDING SA

    Inventor： Pierre Degott ,  Mathieu Schmid ,  Claude-Alain Despland ,  Cédric Amerasinghe

    IPC: B42D25/00 ,  B42D25/369 ,  C09C1/62 ,  C09D5/36 ,  C09D5/38 ,  B41M1/42 ,  B41M3/14 ,  B42D25/378 ,  D21H21/48 ,  C09D7/62 ,  B05D3/00 ,  B05D5/06 ,  B41M7/00

    Abstract: The invention relates to the field of non-spherical magnetic or magnetisable pigment particles and coating compositions comprising those pigment particles for producing optical effect layers (OEL) wherein the magnetic or magnetisable pigment particles are magnetically oriented. In particular, the present invention provides uses of said optical effect layers (OEL) layers as anti-counterfeit means on security documents or security articles. In particular, it relates to the field of non-spherical magnetic or magnetisable pigment particles comprising a magnetic metal selected from the group consisting of cobalt, iron, gadolinium and nickel; a magnetic alloy of iron, manganese, cobalt, nickel, or a mixture of two or more thereof; a magnetic oxide of chromium, manganese, cobalt, iron, nickel or a mixture of two or more thereof; or a mixture of two or more thereof, and having a d50 value higher than 6 μm and lower than 13 μm, their uses in coating compositions comprising a binder material for producing an optical effect layer (OEL), OEL obtained thereof and processes for producing said OEL.

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