# US 2019/0171160 A1 · Shaped body having a volume hologram and method for production thereof

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- Number: US 2019/0171160 A1
- Document ID: US20190171160A1
- Status: Published application
- Kind: A1
- Application number: 16/324,746
- Filed: 2017-08-10
- Published: 2019-06-06
- Earliest claimed: 2016-08-12
- Assignees: Covestro Deutschland AG
- Applicants: Covestro Deutschland AG
- Inventors: Rainer HAGEN; Thomas FÄCKE; Enrico ORSELLI; Ute FLEMM; Ulrich GROSSER
- Web page: https://patentgrep.com/patent/US20190171160A1

## CPC

- G03H 1/0272: {Substrate bearing the hologram}
- B29C 45/14336: {Coating a portion of the article, e.g. the edge of the article (B29C45/14573 and B29C45/14598 take precedence)}
- B29C 45/14688: {Coating articles provided with a decoration}
- B32B 3/04: characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/00: Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)}
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/288: {comprising polyketones}
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- G03H 1/0248: {Volume holograms}
- G03H 1/0252: {Laminate comprising a hologram layer}
- B29C 70/68: by incorporating or moulding on preformed parts, e.g. inserts or layers {, e.g. foam blocks (mould constructions therefor B29C33/12; joining preformed parts by moulding B29C65/70)}
- B29C 70/78: Moulding material on one side only of the preformed part
- B29C 2045/14852: {incorporating articles with a data carrier, e.g. chips}
- B29C 2045/14918: {in-mould-labelling}
- B29C 2945/76498: Pressure
- B29C 2945/76531: Temperature
- B29K 2905/00: Use of metals, their alloys or their compounds, as mould material
- B29K 2995/0018: having particular optical properties, e.g. fluorescent or phosphorescent
- B29L 2011/00: Optical elements, e.g. lenses, prisms
- B32B 2274/00: Thermoplastic elastomer material
- B32B 2307/40: having particular optical properties
- B32B 2307/41: Opaque
- B32B 2307/412: Transparent
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/584: Scratch resistance
- B32B 2307/732: Dimensional properties
- B32B 2519/00: Labels, badges
- G03H 1/0011: {for security or authentication (holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032)}
- G03H 2250/10: arranged to be transferred onto a carrier body
- G03H 2250/37: Enclosing the photosensitive material
- G03H 2260/12: Photopolymer
- G03H 2270/14: Plastic
- G03H 2270/31: Flexible
- 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})
- 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
- 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

The present invention concerns a method for the production of a moulded body containing at least one volume hologram by means of injection moulding, comprising the following method steps: provision of a hologram film composite having two sides comprising at least one photopolymer layer with at least one volume hologram, a shear protective layer and a substrate layer, and optionally, further composite film layers, insertion of the hologram film composite into a metallic injection mould, such that one side of the hologram film composite is at least partially in contact with the injection mould wall, introduction of a molten thermoplastic polymer for the production of the moulded body, wherein at least the outermost layer of the hologram film composite on the side of the hologram film composite coming into contact with the molten polymer contains essentially the same polymer raw materials as the molten thermoplastic polymer, and extrusion coating of the hologram film composite with the molten thermoplastic polymer, and solidification of the molten thermoplastic polymer. The invention also concerns a moulded body produced in this manner and advantageous applications of this moulded body.

## Claims

### Claim at position 1

-15. (canceled)

### Claim 16

A method for the production of a moulded body containing at least one volume hologram by means of injection moulding, comprising the following method steps:
provision of a hologram film composite having two sides comprising at least one photopolymer layer with at least one volume hologram, a shear protective layer and a substrate layer, and optionally, further composite film layers,
insertion of the hologram film composite into a metallic injection mould, such that one side of the hologram film composite is at least partially in contact with the injection mould wall,
introduction of a molten thermoplastic polymer for the production of the moulded body, wherein at least the outermost layer of the hologram film composite on the side of the hologram film composite coming into contact with the molten polymer contains essentially the same polymer raw materials as the molten thermoplastic polymer, extrusion coating of the hologram film composite with the molten thermoplastic polymer, and
solidification of the molten thermoplastic polymer.

### Claim 17 (depends on 16)

The method according to claim 16, wherein the hologram film composite is inserted into the metallic injection mould such that the substrate layer is inserted facing the metallic injection mould with its side that faces away from the photopolymer layer, such that the substrate layer is at least partially in contact with the injection mould wall.

### Claim 18 (depends on 16)

The method according to claim 16, wherein the shear protective film is formed by a protective lacquer.

### Claim 19 (depends on 16)

The method according to claim 16, wherein the hologram film composite is inserted into the metallic injection mould such that the photopolymer layer is inserted with its free surface facing the metallic injection mould, such that the photopolymer layer is at least partially in contact with the injection mould wall.

### Claim 20 (depends on 19)

The method according to claim 19, wherein the substrate layer and the shear protective layer are integrally configured.

### Claim 21 (depends on 16)

The method according to claim 16, wherein the substrate layer contains a polymer from the group PC, PMMA, PET, PBT, PA, PS and PC/ABS.

### Claim 22 (depends on 16)

The method according to claim 16, wherein the thermoplastic polymer contains a polymer from the group PC, PMMA, PET, PBT, PA, PS and PC/ABS.

### Claim 23 (depends on 16)

The method according to claim 16, wherein the thermoplastic polymer contains additives, more particularly solvents, polymeric mixed substances or design-providing particles, dyes or absorbent pigments.

### Claim 24 (depends on 23)

The method according to claim 23, wherein the additives contained in the thermoplastic polymer have a volume percentage of less than 20%, preferably less than 10% and particularly preferably less than 5%.

### Claim 25 (depends on 16)

The method according to claim 16, wherein the thermoplastic polymer contains reinforcing agents, more particularly glass or carbon fibres or fabric.

### Claim 26 (depends on 16)

The method according to claim 16, wherein the hologram film composite, before insertion of said hologram film composite into the metallic injection mould, is cut such that all layers of the hologram film composite have the same dimensions, with common cut edges that are oriented essentially perpendicularly to the extension of the hologram film composite.

### Claim 27 (depends on 16)

The method according to claim 16, wherein the wall of the metallic injection mould does not exceed a maximum temperature of 100° C., preferably 90° C. and particularly preferably 80° C.

### Claim 28 (depends on 16)

The method according to claim 16, wherein the internal mould pressure is a maximum of 1000 bar, preferably a maximum of 800 bar and more particularly a maximum of 700 bar, wherein the cycle time is a maximum of 30 s, preferably a maximum of 25 s and more particularly a maximum of 20 s.

### Claim 29 (depends on 16)

A moulded body containing at least one volume hologram produced by the method according to claim 16.

### Claim 30 (depends on 29)

A method comprising utilizing the moulded body containing at least one volume hologram according to claim 29 as a beam-guiding and/or beam-forming optical component for 3-dimensional imaging or as a security hologram in documents and for product protection and product labelling.