Holographic film and method for forming

• US 5,643,678 A
• Filed: 10/10/1995
• Issued: 07/01/1997
• Est. Priority Date: 04/04/1994
• Status: Expired due to Fees

• Current Assignee: National City Bank (The PNC Financial Services Group, Inc.)
• Original Assignee: NovaVision
• Inventors: Boswell, David R.
• Primary Examiner(s): KRYNSKI, WILLIAM A
• Application Number:
  US08/541,312
• Time in Patent Office: 630 Days
• Field of Search: 428/411.1, 428/412, 428/446, 428/484, 428/500, 428/913, 428/467, 428/195, 428/212, 428/457, 428/461
• US Class Current: 428/467
• CPC Class Codes: B29C 59/046 for layered or coated substantially flat surfaces
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: B29L 2017/00 Carriers for sound or information
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 2309/02 Temperature
• CPC Class Codes: B32B 2425/00 Cards, e.g. identity cards, credit cards
• CPC Class Codes: B32B 2429/00 Carriers for sound or information
• CPC Class Codes: B32B 37/22 involving the assembly of both discrete and continuous layers
• CPC Class Codes: B32B 38/00 Ancillary operations in connection with laminating processes
• CPC Class Codes: B32B 38/06 Embossing
• CPC Class Codes: B32B 38/1841 during laying up
• CPC Class Codes: B32B 7/06 permitting easy separation
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B41M 1/22 Metallic printing; Printing with powdered inks
• CPC Class Codes: B41M 1/24 combined with embossing printing machines for carrying out printing operations combined with embossing B41F19/02
• CPC Class Codes: B41M 3/14 Security printing securities B42D25/29
• CPC Class Codes: B41M 7/0027 using protective coatings or layers by lamination or by fusion of the coatings or layers
• CPC Class Codes: B42D 25/328 Diffraction gratings; Holograms
• CPC Class Codes: B44C 1/1729 Hot stamping techniques
• CPC Class Codes: G03H 1/0244 Surface relief holograms replicating hologram without interference recording G03H1/0276
• CPC Class Codes: G03H 1/0252 : Laminate comprising a hologram layer
• CPC Class Codes: G03H 1/028 : by embossing
• CPC Class Codes: G03H 2227/04 : Production line for mass production
• CPC Class Codes: G03H 2240/55 : Thickness
• CPC Class Codes: G03H 2250/10 : arranged to be transferred onto a carrier body
• CPC Class Codes: G03H 2250/12 : Special arrangement of layers
• CPC Class Codes: G03H 2250/40 : Printed information overlapped with the hologram
• CPC Class Codes: H05K 3/046 : by selective transfer or selective detachment of a conductive layer
• CPC Class Codes: Y10S 428/913 : Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 156/1041 : Subsequent to lamination
• CPC Class Codes: Y10T 428/1338 : Elemental metal containing
• CPC Class Codes: Y10T 428/1438 : Metal containing
• CPC Class Codes: Y10T 428/1443 : Aluminum
• CPC Class Codes: Y10T 428/1457 : Silicon
• CPC Class Codes: Y10T 428/24802 : Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24942 : including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/24975 : No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/263 : Coating layer not in excess of 5 mils thick or equivalent
• CPC Class Codes: Y10T 428/265 : 1 mil or less
• CPC Class Codes: Y10T 428/2804 : Next to metal
• CPC Class Codes: Y10T 428/2813 : Heat or solvent activated or sealable
• CPC Class Codes: Y10T 428/2817 : Heat sealable
• CPC Class Codes: Y10T 428/2826 : Synthetic resin or polymer
• CPC Class Codes: Y10T 428/31504 : Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/31663 : As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31667 : Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31678 : Of metal
• CPC Class Codes: Y10T 428/31681 : Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31692 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31696 : Including polyene monomers [e.g., butadiene, etc.]
• CPC Class Codes: Y10T 428/31699 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31703 : Next to cellulosic
• CPC Class Codes: Y10T 428/31714 : Next to natural gum, natural oil, rosin, lac or wax
• CPC Class Codes: Y10T 428/31786 : Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31801 : Of wax or waxy material
• CPC Class Codes: Y10T 428/31935 : Ester, halide or nitrile of addition polymer

Abstract

A foil/composite sheet having a holographic image or diffraction grating image and a method for forming permits the party producing the final document to hot stamp a chip containing the holographic image directly on a substrate forming the major portion of the final document. The foil/composite sheet includes successively a plastic carrier film, a release coating, a hard lacquer coating, a soft lacquer coating, a layer of metal and an embossment receiving coating, the latter three of which become embossed with the holographic image when a heated embossing shim is pressed under pressure against the embossment receiving layer. A heat activatable adhesive is thereafter applied to the embossment receiving coating.

Claims

1. A composite sheet comprising:

(a) a thermoplastic substrate;

(b) a release coating having a thickness of 0.025 microns to 5 microns affixed to said substrate;

(c) a coating of hard lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said release coating, said hard lacquer having a glass transition temperature of at least 80°

C.;

(d) a coating of soft lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said hard lacquer coating, said soft lacquer having a glass transition temperature no higher than 70°

C.;

(e) a layer of metal having a thickness in the range of 20 millimicrons to 100 millimicrons affixed to said soft lacquer coating; and

(f) an embossment receiving coating having a thickness in the range of 0.025 micron to 1 micron affixed to said layer of metal, said embossment receiving coating being an esterified montan wax.

2. The composite sheet of claim 1, wherein a diffraction grating image is embossed in said embossment receiving coating, said layer of metal and said soft lacquer coating.

3. The composite sheet of claim 1, wherein said embossment receiving coating includes esterfied montan wax combined with aluminum stearate, toluene and cellulose.

4. The composite sheet of claim 3, wherein a diffraction grating image is embossed in said embossment receiving coating, said layer of metal and said soft lacquer coating.

5. The composite sheet of claim 3, further including a coating of heat activatible adhesive having a thickness in the range of 0.75 microns to 4 microns affixed to said embossment receiving coating.

6. The composite sheet of claim 1, wherein said coating of soft lacquer is a member selected from the group consisting of acrylic, nitrocellulose and chlorinated rubber.

7. The composite sheet of claim 6, wherein said coating of hard lacquer is a member selected from the group consisting of polymethyl methacrylate, styrene acrylonitrile, polyethyleneterephthlate and nitrocellulose.

8. A composite sheet comprising:

(a) a thermoplastic substrate having a thickness in the range of 12 microns to 50 microns;

(b) a release coating having a thickness of 0.025 microns to 5 microns affixed said substrate;

(c) a coating of hard lacquer having a thickness in the range of 0.5 microns to 5 microns affixed said release coating, said hard lacquer having a glass transition temperature of at least 80°

C.;

(d) a coating of soft lacquer having a thickness in the range of 0.5 microns to 5 microns affixed said hard lacquer coating, said soft lacquer having a glass transition temperature no higher than 70°

C.;

(e) a layer of metal having a thickness in the range of 20 millimicrons to 100 millimicrons affixed said soft lacquer coating; and

(f) an embossment receiving coating having a thickness in the range of 0.025 micron to 1 micron affixed said layer of metal, said embossment receiving coating being an esterified montan wax.

9. The composite sheet of claim 8, wherein a diffraction grating image is embossed in said embossment receiving coating, said layer of metal and said soft lacquer coating.

10. The composite sheet of claim 8, wherein said embossment receiving coating includes esterified montan wax combined with aluminum stearate, toluene and cellulose.

11. The composite sheet of claim 10, wherein a diffraction grating image is embossed in said embossment receiving coating, said layer of metal and said soft lacquer coating.

12. The composite sheet of claim 9, further including a coating of heat activatible adhesive having a thickness in the range of 0.75 microns to 4 microns affixed said embossment receiving coating.

13. The composite sheet of claim 8, wherein said coating of soft lacquer is a member selected from the group consisting of acrylic, nitrocellulose and chlorinated rubber.

14. The composite sheet of claim 13, wherein said coating of hard lacquer is a member selected from the group consisting of polymethyl methacrylate, styrene acrylonitrile, polyethyleneterephthlate and nitrocellulose.