Infrared blocking article
View Patent ↗The present invention relates to a process for producing an opaque, transparent or translucent transaction card having multiple features, such as a holographic foil, integrated circuit chip, silver magnetic stripe with text on the magnetic stripe, opacity gradient, an invisible optically recognizable compound, a translucent signature field such that the signature on back of the card is visible from the front of the card and an active thru date on the front of the card. The invisible optically recognizable compound is an infrared ink and/or film, which can be detected by a sensor found in an ATM or card assembly line.
1. An article comprising:
a thermoplastic material having a surface, wherein said surface comprises at least one of a translucent surface or transparent surface;
a first infrared blocking ink on said thermoplastic material, and
a second infrared blocking ink screened onto said surface of said thermoplastic material,
wherein said article is formed by combining said first infrared blocking ink with said thermoplastic material at a temperature above the melting point of said thermoplastic material.
2. The article of claim 1 , wherein said article is formed by screening said first infrared blocking ink onto said surface of said thermoplastic material.
3. The article of claim 1 , wherein said article is incorporated into a transaction card.
4. The article of claim 1 , wherein said article is capable of blocking infrared light at substantially all points on said surface.
5. The article of claim 1 , further comprising a birefringent dielectric multilayer film associated with, and substantially covering, said surface.
6. The article of claim 5 , wherein said birefringent dielectric multilayer film is configured to block infrared light in a first wavelength range and said infrared blocking ink is configured to block infrared light in a second wavelength range.
7. The article of claim 1 , wherein said first infrared blocking ink comprises a rare earth compound.
8. The article of claim 1 , wherein said article is incorporated into a transaction card.
9. A method comprising:
combining a first infrared blocking ink with a first thermoplastic material at a temperature above the melting point of said first thermoplastic material to form an infrared blocking thermoplastic material;
forming an article from said infrared blocking thermoplastic material having at least one of a translucent surface or a transparent surface such that infrared light is substantially blocked at all points on said surface, and
screening a second infrared blocking ink onto said surface.
10. The method of claim 9 , further comprising incorporating said article into a transaction card.
11. The method of claim 9 , wherein said first infrared blocking ink is capable of blocking infrared light in a first wavelength range and said second infrared blocking ink is capable of blocking infrared light in a second wavelength range.
12. The method of claim 9 , further comprising applying a birefringent dielectric multilayer film to said surface.