Security laminates with interlaminated transparent embossed polymer hologram
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United States of America Patent
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May 7, 2013
Grant Date -
Aug 25, 2011
app pub date -
Sep 19, 2008
filing date -
Sep 20, 2007
priority date (Note) -
Expired
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Abstract
A method for interlaminating a transparent embossed hologram, the transparent embossed hologram comprising a support having two sides, at least one of the two sides either itself being embossed or having a layer thereon which is embossed and a layer of a HRI-material contiguous with the embossed side or embossed layer, comprising the steps of: a) conditioning the outermost surface of the layer of inorganic HRI-material with at least one organic liquid; b) drying the outermost surface of the layer of the inorganic HRI-material thereby providing a conditioned outermost surface of the layer of inorganic HRI-material; c) applying an adhesive layer to the conditioned outermost surface; and d) laminating the outermost surface of inorganic HRI-material to an optionally transparent film, wherein the at least one organic liquid is selected from the group consisting of ketones, ethers, heterocyclic ethers, lactams, amides, halo-aliphatic compounds, nitriles and esters; wherein at least one of the support and the film is transparent; and wherein the HRI-material is a material with a refractive index of at least 0.3 higher than that of the embossed material. A laminate obtainable with the above-mentioned methods and an identity document comprising the laminate are also disclosed.
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