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    • 8. 发明申请
    • OPTICAL EFFECT LAYERS SHOWING A VIEWING ANGLE DEPENDENT OPTICAL EFFECT; PROCESSES AND DEVICES FOR THEIR PRODUCTION; ITEMS CARRYING AN OPTICAL EFFECT LAYER; AND USES THEREOF
    • 光学效应层显示视角相关光学效应; 生产过程和设备; 项目携带一个光学效应层; 并使用它
    • WO2014108404A3
    • 2014-12-04
    • PCT/EP2014050161
    • 2014-01-07
    • SICPA HOLDING SA
    • SCHMID MATHIEULOGINOV EVGENYDESPLAND CLAUDE ALAINDEGOTT PIERRE
    • B05D3/00B41M3/14B42D15/00
    • B42D25/369B05D3/20B05D3/207B41M3/148B42D25/29B42D2033/16B42D2033/20B42D2035/20B44F1/10G07D7/003H01F7/0273H01F41/16
    • The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the invention relates to optical effect layers (OEL) showing a viewing-angle dependent optical effect, devices and processes for producing said OEL and items carrying said OEL, as well as uses of said optical effect layers as an anti-counterfeit means on documents. The OEL comprises a plurality of non-spherical magnetic or magnetizable particles, which are dispersed in a coating composition comprising a binder material, wherein in at least a loop-shaped area of the OEL at least a part of the plurality of non-spherical magnetic or magnetizable particles are oriented such that their longest axis is substantially parallel to the plane of the OEL, and wherein, in a cross-section perpendicular to the OEL and extending from the centre of the central area, the longest axis of the oriented particles present in the loop-shaped area forming the impression of the loop-shaped body follow a tangent of either a negatively curved or a positively curved part of a hypothetical ellipse or circle.
    • 本发明涉及保护安全文件例如钞票和身份证件以防止伪造和非法复制的领域。 特别地,本发明涉及显示取决于视角的光学效应的光学效应层(OEL),用于产生所述OEL的装置和工艺以及携带所述OEL的物品,以及所述光学效应层用作防伪装置 在文件上。 OEL包括多个分散在包含粘合剂材料的涂料组合物中的非球形磁性或可磁化颗粒,其中在OEL的至少一个环形区域中,多个非球形磁体的至少一部分 或可磁化颗粒的取向使得它们的最长轴基本上平行于OEL的平面,并且其中在垂直于OEL并且从中心区域的中心延伸的截面中存在取向颗粒的最长轴 在形成环形体的印痕的环形区域中遵循假想的椭圆或圆的负弯曲部分或正弯曲部分的切线。