Laser engraving methods and compositions, and articles having laser engraving thereon
First Claim
1. An article of manufacture capable of being laser engraved with a grayscale indicium, comprising:
- a first layer comprising a first host material, the first host material comprising an effective amount of a first laser enhancing additive comprising at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
a second layer operably coupled to the first layer, the second layer comprising a second host material, the second layer oriented in relation to the first host material such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer, the second host material comprising an effective amount of a second laser enhancing additive, the second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
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Accused Products
Abstract
The invention provides a composition having laser engraving properties, comprising a host material and an effective amount of a laser enhancing additive. The laser enhancing additive comprises a first quantity of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI), and a second quantity at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. The composition can be engraved with grayscale images by an Nd:Yag laser and can be added to laminates or coatings. The composition can be used during the manufacture of many articles of manufacture, including identification documents.
160 Citations
19 Claims
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1. An article of manufacture capable of being laser engraved with a grayscale indicium, comprising:
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a first layer comprising a first host material, the first host material comprising an effective amount of a first laser enhancing additive comprising at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
a second layer operably coupled to the first layer, the second layer comprising a second host material, the second layer oriented in relation to the first host material such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer, the second host material comprising an effective amount of a second laser enhancing additive, the second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A composition having laser engraving properties, comprising:
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a host material; and
an effective amount of a laser enhancing additive mixed into the host material, the laser enhancing additive comprising;
a first quantity of at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester;
wherein the laser enhancing additive is present in an amount from about 0.001 to 0.2 percent by weight based on the total weight of the composition; and
wherein the composition comprises a coating or laminate. - View Dependent Claims (11, 12, 13)
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14. An identification document, comprising:
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a core layer;
a first layer overlaying at least a portion of the core layer and affixed to the portion of the core layer, the first layer comprising an additive that comprises;
an effective amount of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
an effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. wherein the first layer is at least one of a coating and a laminate. - View Dependent Claims (15, 16, 17, 18)
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19. A method of manufacturing a laminate, comprising:
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providing a laser enhancing additive in a polycarbonate host material, the laser enhancing additive comprising;
at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
combining the polycarbonate host material, including the laser enhancing additive, with additional polycarbonate material to form a laminate film that is laser engraveable.
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Specification