Cards and laminates incorporating multilayer optical films
First Claim
Patent Images
1. A visible light transmissive card, comprising:
- a first and second polymer layer each having a thickness of at least 5 mils (125 μ
m);
a multilayer optical film disposed between the first and second polymer layers, the film having a reflection band at normal incidence substantially covering the range 800-1000 nm; and
a plurality of adhesive layers between the multilayer optical film and the first and second polymer layers;
wherein the card has a haze no greater than 12%.
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Accused Products
Abstract
New constructions of multilayer optical films, laminates thereof, and cards incorporating same are disclosed. In a card, the multilayer optical film can be sandwiched between relatively thick polymer layers using adhesive layers that are at least 0.5 mils thick but that may collectively account for no more than 3 mils of thickness. The cards can if desired be highly transmissive in the visible yet highly opaque in portions of the infrared. The resulting cards can have reduced angel hair formation during card stamping, increased resistance to delamination, and reduced haze.
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Citations
20 Claims
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1. A visible light transmissive card, comprising:
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a first and second polymer layer each having a thickness of at least 5 mils (125 μ
m);a multilayer optical film disposed between the first and second polymer layers, the film having a reflection band at normal incidence substantially covering the range 800-1000 nm; and a plurality of adhesive layers between the multilayer optical film and the first and second polymer layers; wherein the card has a haze no greater than 12%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A card, comprising:
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a first and second polymer layer each having a thickness of at least 5 mils (125 μ
m);a multilayer optical film disposed between the first and second polymer layers, the film having a reflection band at normal incidence covering a desired spectral region; and a plurality of adhesive layers between the multilayer optical film and the first and second polymer layers; wherein the multilayer optical film comprises alternating layers of coPEN and a copolyester; wherein the copolyester comprises PETG. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A card, comprising:
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a first and second polymer layer each having a thickness of at least 5 mils (125 μ
m);a multilayer optical film disposed between the first and second polymer layers, the film having a reflection band at normal incidence covering a desired spectral region; and a plurality of adhesive layers between the multilayer optical film and the first and second polymer layers; wherein the multilayer optical film comprises alternating layers of coPEN and a copolyester; wherein the adhesive layers are at least about 0.5 mil (13 μ
m) thick and have a hardness of less than about 30 MPa. - View Dependent Claims (16)
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17. A card, comprising:
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a first and second polymer layer each having a thickness of at least 5 mils (125 μ
m);a multilayer optical film disposed between the first and second polymer layers, the film having a reflection band at normal incidence covering a desired spectral region; and a plurality of adhesive layers between the multilayer optical film and the first and second polymer layers;
wherein the multilayer optical film comprises alternating layers of coPEN and a copolyester;wherein the card is substantially free of polyvinyl chloride (PVC). - View Dependent Claims (18)
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19. A card, comprising:
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a first and second polymer layer each having a thickness of at least 5 mils (125 μ
m);a multilayer optical film disposed between the first and second polymer layers, the film having a reflection band at normal incidence covering a desired spectral region; and a plurality of adhesive layers between the multilayer optical film and the first and second polymer layers; wherein the multilayer optical film comprises alternating layers of coPEN and a copolyester; wherein the card has a haze of no greater than 12%. - View Dependent Claims (20)
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Specification