Laminated card comprising a thermochromic pattern and method for manufacturing such a card
AssigneeIdemia France
InventorsJustine DEBRIFFE, Inès DAUDE, Caroline WEISSKOPP
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Abstract
A laminated card and a method for manufacturing such a card. The card includes a thermoplastics backing layer, an adhesive layer, a primer layer, a thermochromic pattern which is printed using a thermochromic ink, and a plastics protective layer. The primer layer is suitable for the thermochromic ink, enabling good adhesion of the thermochromic pattern to the lower layers such as to the backing layer via the adhesive layer. The adhesive layer and the primer layer are both water-based or both polymerised under UV radiation. The thermochromic ink includes a liquid crystal compound.
Claims19
A laminated card comprising, in order:
- a thermoplastic support layer;
- an adhesive layer;
- a tie layer;
- a thermochromic pattern printed by way of a thermochromic ink;
- and
- a protective plastic layer,
- wherein the adhesive layer and the tie layer are both water-based or polymerizable under ultraviolet radiation, said thermochromic ink including a liquid crystal compound.
A process for manufacture of a laminated card comprising:
- providing a thermoplastic support layer;
- depositing an adhesive layer on the support layer;
- depositing a tie layer on the adhesive layer after dried,
- the adhesive layer and the tie layer both being water-based and/or both being polymerizable under ultraviolet radiation;
- printing a thermochromic pattern on the dried tie layer by way of a thermochromic ink, said thermochromic ink including a liquid crystal compound;
- depositing a protective plastic layer on the dried thermochromic pattern;
- and
- laminating an assembly.
Dependencies are inferred from the claim text.