Foam security substrate
Assignee3M Innovative Properties Company
InventorsChristopher Haas, Robert Taylor, William Black, James Jonza, Jay Jennen, David Vall, Roger Stumo
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Abstract
The present invention is directed an oriented, foamed article having an integral security element, and a method of making the article. The oriented foam article is particularly useful in the preparation of printed security documents such as currency, stock and bond certificates, birth and death certificates, land titles and abstracts and the like.
Claims36
A security substrate comprising at least one oriented, high melt-strength polypropylene foam layer and at least one security element, said foam layer having two substantially smooth major surfaces.
Dependencies are inferred from the claim text.