# US 11,077,698 B2 · Volume hologram sheet to be embedded, forgery prevention paper, and card

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- Number: US 11,077,698 B2
- Document ID: US11077698B2
- Status: Granted
- Kind: B2
- Application number: 16/376,410
- Filed: 2019-04-05
- Published: 2019-08-01
- Granted: 2021-08-03
- Earliest claimed: 2010-01-19
- Assignees: Dai Nippon Printing Co., Ltd.
- Applicants: Dai Nippon Printing Co., Ltd.
- Inventors: Nobuko Oikawa; Minoru Azakami
- Web page: https://patentgrep.com/patent/US11077698B2

## CPC

- B42D 25/328: Diffraction gratings; Holograms
- B29C 65/48: using adhesives {, i.e. using supplementary joining material; solvent bonding}
- B29C 65/482: {Drying adhesives, e.g. solvent based adhesives}
- B29C 65/483: {Reactive adhesives, e.g. chemically curing adhesives}
- B29C 65/8223: {Peel tests}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/45: {Joining of substantially the whole surface of the articles (methods or apparatus for laminating B32B37/00)}
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B29C 66/712: {the composition of one of the parts to be joined being different from the composition of the other part}
- B29C 66/733: {characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/36: comprising polyesters
- B32B 37/12: characterised by using adhesives
- B32B 37/182: {one or more of the layers being plastic}
- B42D 25/355: Security threads
- B42D 25/41: using electromagnetic radiation (B42D25/435 takes precedence)
- B42D 25/455: using heat
- B42D 25/46: using pressure
- B42D 25/47: using adhesives
- B42D 25/475: Cutting cards
- C09D 11/02: Printing inks (C09D11/30 takes precedence)
- C09D 11/037: characterised by the pigment
- C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D 127/06: Homopolymers or copolymers of vinyl chloride
- C09D 131/04: Homopolymers or copolymers of vinyl acetate
- C09D 133/14: of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09J 7/35: Heat-activated
- C09J 11/06: organic
- C09J 133/08: Homopolymers or copolymers of acrylic acid esters
- D21H 21/40: Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00)
- D21H 21/42: Ribbons or strips (filaments D21H15/06)
- G03H 1/0011: {for security or authentication (holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032)}
- G03H 1/0248: {Volume holograms}
- G03H 1/0252: {Laminate comprising a hologram layer}
- G09F 3/0292: {tamper indicating labels}
- B29C 65/485: {Multi-component adhesives, i.e. chemically curing as a result of the mixing of said multi-components}
- B29C 66/72328: {Paper}
- B29K 2633/00: Use of polymers of unsaturated acids or derivatives thereof for preformed parts, e.g. for inserts ({B29K2635/00} takes precedence)
- B29K 2667/003: {PET, i.e. poylethylene terephthalate}
- B29L 2017/001: {Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records}
- B32B 2037/1253: {curable adhesive}
- B32B 2305/347: Security elements
- B32B 2307/542: Shear strength
- B32B 2310/0843: using laser
- B32B 2310/14: Corona, ionisation, electrical discharge, plasma treatment
- B32B 2317/12: Paper, e.g. cardboard
- B32B 2333/00: Polymers of unsaturated acids or derivatives thereof
- B32B 2367/00: Polyesters, e.g. PET, i.e. polyethylene terephthalate
- B32B 2425/00: Cards, e.g. identity cards, credit cards
- B42D 2033/04
- B42D 2033/08
- B42D 2033/10
- B42D 2033/14
- B42D 2033/16
- B42D 2033/20
- B42D 2033/28
- B42D 2033/30
- B42D 2033/32
- C09J 2301/414: presence of a copolymer
- C09J 2433/00: Presence of (meth)acrylic polymer
- G03H 2240/50: Parameters or numerical values associated with holography, e.g. peel strength
- G03H 2250/35: Adhesive layer
- B42D: BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00})
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

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.

## Claims

### Claim 1

A card comprising
a core sheet,
a volume hologram sheet, and,
a over sheet,
wherein the volume hologram sheet is embedded between the core sheet and the over sheet,
wherein the volume hologram sheet consisting of a volume hologram layer, a substrate, and an adhesion means,
a film thickness of the volume hologram sheet in a range of 20 μm to 50 μm,
the core sheet and the over sheet are made from similar materials,
a peeling strength of the volume hologram layer and the substrate is 144 gf/25 mm or more, and
wherein the adhesive means is laminated in between a first surface of the volume hologram layer and the substrate, and a second surface of the volume hologram layer is in direct contact with the core sheet with no adhesive material between the second surface of the volume hologram layer and the core sheet.

### Claim 2 (depends on 1)

The card according to claim 1, wherein a main component of a resin material used in the volume hologram layer is an acrylic resin material, and the substrate is made of a polyester resin.

### Claim 3 (depends on 1)

The card according to claim 1, wherein the adhesion means is an adhesive layer, and an adhesive used for the adhesive layer is a curable adhesive.

### Claim 4 (depends on 3)

The card according to claim 3, wherein the adhesion layer comprises a polyol component and an isocyanate component.

### Claim 5 (depends on 1)

The card according to claim 1, wherein the adhesion means is an easy adhesion-surface on the substrate and the easy adhesion-surface is formed by applying a primer agent on the surface of the substrate.

### Claim 6 (depends on 1)

The card according to claim 1, wherein the over sheet is transparent and the core sheet is opaque.

### Claim 7 (depends on 1)

The card according to claim 1, wherein the volume hologram layer comprises epoxy group-containing acrylic resin, polyvinyl acetate, 1,6-hexane diol diglycidyl ether, diphenoxy ethanol fluorine diacrylate, diaryl iodonium salt, and 2,5-bis(4-diethyl amino benzylidene)cyclopentanone.

### Claim 8 (depends on 1)

The card according to claim 1, wherein the peeling strength is measured based on the 180-degree peeling test.