Holographic film and method for forming
First Claim
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.
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Accused Products
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.
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Citations
14 Claims
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1. A composite sheet comprising:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A composite sheet comprising:
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(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. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification