Patent application number | Description | Published |
20080316556 | VOLUME HOLOGRAM TRANSFER FOIL, VOLUME HOLOGRAM LAMINATE, AND PRODUCTION METHOD THEREOF - A major object of the present invention is to provide a volume hologram transfer foil that gives a volume hologram laminate higher in antiforgery function, | 12-25-2008 |
20100104952 | METHOD OF PRODUCING VOLUME HOLOGRAM LAMINATE - A method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. The method uses a volume hologram forming substrate which includes: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound. The producing method includes processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound. | 04-29-2010 |
20120286504 | VOLUME HOLOGRAM SHEET TO BE EMBEDDED, FORGERY PREVENTION PAPER, AND CARD - An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more. | 11-15-2012 |
20130182301 | VOLUME HOLOGRAM TRANSFER FOIL - A primary object of the invention is to provide a volume hologram transfer foil which has good foil cutting characteristics and is used to manufacture a volume hologram laminate by transferring a volume hologram layer to an adherend by thermocompression. The above problem is solved by a volume hologram transfer foil comprising a base material, a protective layer formed on the base material, a volume hologram layer formed on the protective layer and having a volume hologram recorded, and a heat seal layer formed on the volume hologram layer, wherein the protective layer contains a hard coat component formed of an ionizing radiation-curable resin, a rupture elongation control component which improves the rupture elongation of the protective layer, and a foil cutting characteristic control component which has a thermal expansion coefficient different from those of the hard coat component and rupture elongation control component and is incompatible with the two components. | 07-18-2013 |
20140016167 | VOLUME HOLOGRAM TRANSFER FOIL, VOLUME HOLOGRAM LAMINATE, AND PRODUCTION METHOD THEREOF - A major object of the present invention is to provide a volume hologram transfer foil that gives a volume hologram laminate higher in antiforgery function. | 01-16-2014 |
20140240805 | METHOD OF PRODUCING VOLUME HOLOGRAM LAMINATE - A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound. | 08-28-2014 |
20150212487 | PHOTOSENSITIVE COMPOSITION FOR VOLUME HOLOGRAM RECORDING, PHOTOSENSITIVE SUBSTRATE FOR VOLUME HOLOGRAM RECORDING, AND VOLUME HOLOGRAM RECORDED MEDIUM - The present invention is to provide: a photosensitive composition for volume hologram recording and a photosensitive substrate for volume hologram recording, which provide increased sensitivity during hologram recording and a high refractive index modulation amount, and which do not inhibit the decolorization of the sensitizing dye; and a volume hologram recorded medium which provides high-luminance hologram images with increased productivity. Disclosed is a photosensitive composition for volume hologram recording, comprising: a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the photopolymerization initiator, a binder resin, and a thiol group-containing compound, wherein the photopolymerizable monomer contains a photoradically polymerizable monomer and a photocationically polymerizable monomer; wherein the thiol group-containing compound is a chain transfer agent for the photoradically polymerizable monomer and is a polyfunctional secondary thiol compound having two or more secondary thiol groups per molecule; and wherein the content of the thiol group-containing compound is 1.5 to 30 parts by mass with respect to 100 parts by mass of the photoradically polymerizable monomer. | 07-30-2015 |