Method for making holograms
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
May 24, 2007
app pub date -
Jun 25, 2002
filing date -
Jun 28, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A durable holographically imaged paper, plastic film or other product is produced by embossing the image into a thermoplastic coating thereon which comprises plastic pigment particles. The plastic pigment particles are preferably hollow but may be solid. The coating preferably also comprises a thermoplastic polymer or copolymer, for example a copolymer of vinyl acetate and versatic acid, an acrylic polymer, a styrene-acrylic or other acrylic copolymer, a vinyl chloride-vinyl acetate-ethylene terpolymer, a polyvinyl acetate or a polyvinyl alcohol. Preferably, the polymer or copolymer has a glass transition temperature (Tg value) in the range 20.degree. C. to 110.degree. C. The thermoplastic coating may also contain inorganic pigments, for example precipitated calcium carbonate (PCC), ground natural calcium carbonate, or kaolin or other clays, and/or a starch binder. Embossing is preferably carried out directly on the thermoplastic coating by means of a holographically engraved shim.
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