Hard coat and image receiving layer structures for indentification documents
The invention provides hard coat and image receiving layer structures and related methods used in ID document production. These structures and methods provide ID documents that offer hard protection in areas where needed (e.g., in optical windows for machine readable data), and also provide image receiving layers for later printing of variable data, such as personalization information of the bearer. Implementations of the structure provide an effective interface between hard coat and image receiving layers that provides enhanced durability in manufacture and field use.
1. An identification document structure comprising:
a base layer having first and second opposing surfaces, the base layer incorporating an optical memory device on a first surface of the base layer;
an image receiving layer overlying the first surface of the base layer except over the optical memory device;
a substantially clear hard coat layer overlying the base layer over the optical memory device,
wherein the image receiving layer and the hard coat layer are interleaved over the base layer such that the hard coat layer provides an optical window for the optical memory device and the image receiving layer is operable to receive variable printing; and,
wherein the hard coat layer is recessed relative to the image receiving layer.
2. The identification document structure of claim 1 , wherein the image receiving layer and the hard coat layer are interleaved and applied directly to the base layer.
3. A method of making an identification document comprising:
providing a base layer with a first surface, the base layer incorporating an optical memory device on the first surface;
applying an image receiving layer to at least a portion of the first surface except over the optical memory device
applying a substantially clear hard coat layer over the optical memory device, the hard coat layer providing protection for an optical window of the optical memory device and the image receiving layer operable to receive variable printing after the hard coat layer is applied; and,
wherein the hard coat layer is recessed relative to the image receiving layer.
4. The method of claim 3 , wherein the hard coat layer is applied via a coating process.
5. The method of claim 4 , wherein the coating process comprises at least one of slot coating, rod coating, and gravure coating.
6. The method of claim 3 , wherein the image receiving layer is applied via a coating process.
7. The method of claim 3 , wherein the hard coat layer is cured with a curing process such that the hard coat layer chemically bonds with the image receiving layer.