Hologram
AssigneeDenso Corporation
InventorsYasuhiro Mizutani, Naoyuki Kawazoe, Hidekazu Hattori
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Abstract
A hologram has a hologram element 3 containing a photopolymer and a cover film 22 and cover plate 21 which cover its surfaces. An adhesive 1 is used for bonding the cover film to the hologram element and the cover plate to the hologram element. The hologram has excellent humidity resistance, chemical resistance, solvent resistance and heat resistance, prevents coloration, can maintain its holographic properties and allows easy repositioning of the hologram element.
Claims8
A hologram comprising a hologram element containing a photopolymer and at least one cover film covering one or both sides of said hologram element, wherein the hologram element and the cover film are bonded with an adhesive, wherein the weight average molecular weight of said adhesive is from 800,000 to 1,300,000.
Dependencies are inferred from the claim text.