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 that is transmissive to visible light;
a first infrared blocking ink incorporated into said thermoplastic material; and
an infrared blocking film comprising a plurality of layers disposed on said thermoplastic material, said plurality of layers comprising at least two layers having different refractive indices.
2. The article of claim 1 , wherein said article is incorporated into a transaction card.
3. The article of claim 1 , wherein said article is capable of blocking infrared light at substantially all points on said surface.
4. The article of claim 1 , wherein said infrared blocking film comprises a birefringent dielectric multilayer film.
5. The article of claim 1 , wherein said infrared blocking film is configured to block infrared light in a first wavelength range and said first infrared blocking ink is configured to block infrared light in a second wavelength range.
6. The article of claim 5 , wherein said article is incorporated into a transaction card.
7. The article of claim 1 , wherein said incorporation is performed at a temperature above the melting point of said thermoplastic material.
8. A method comprising:
combining a first infrared blocking ink with a thermoplastic material at a temperature above the melting point of said thermoplastic material to form an infrared blocking thermoplastic material;
forming an article from said infrared blocking thermoplastic material, wherein the article has a surface that is transmissive to visible light and substantially opaque at all points on said surface to infrared light, and
applying an infrared blocking film comprising a plurality of layers to said thermoplastic material, said plurality of layers comprising at least two layers having different refractive indices.
9. The method of claim 8 , further comprising incorporating said article into a transaction card.
10. The method of claim 8 , wherein said first infrared blocking ink is capable of blocking infrared light in a first wavelength range and said infrared blocking film is capable of blocking infrared light in a second wavelength range.
11. The method of claim 8 , further comprising screening a second infrared blocking ink onto a surface of said thermoplastic material.
12. The method of claim 11 , wherein said infrared blocking film comprises a birefringent dielectric multilayer film.
13. The method of claim 8 , wherein said first infrared blocking ink comprises a rare earth compound.
14. An article comprising:
a thermoplastic material having a surface that is transmissive to visible light;
a first infrared blocking ink screened onto said thermoplastic material; and
an infrared blocking film comprising a plurality of layers disposed on said thermoplastic material, said plurality of layers comprising at least two layers having different refractive indices.
15. The article of claim 14 , wherein said article is incorporated into a transaction card.
16. The article of claim 14 , wherein said article is capable of blocking infrared light at substantially all points on said surface.
17. The article of claim 14 , wherein said infrared blocking film comprises a birefringent dielectric multilayer film.
18. The article of claim 14 , wherein said infrared blocking film is configured to block infrared light in a first wavelength range and said first infrared blocking ink is configured to block infrared light in a second wavelength range.
19. The article of claim 14 , wherein said first infrared blocking ink comprises a rare earth compound.
20. The article of claim 14 , wherein said article is incorporated into a transaction card.