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US 10,850,492 B2Granted
Security thread for data carriers, data carriers, and production of said data carriers
AssigneeGiesecke+Devrient Mobile Security GmbH
InventorsGünter Endres, Jürgen Karl Stahl, Lars Hoffmann
Life of this patent
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Abstract
Into a plastic card (1) of polycarbonate layers (10; 11; 12) there is laminated a security thread (3) by applying pressure and temperature, the security thread itself having a carrier foil (5) of polycarbonate and a coating (6) that is borne by the carrier foil and conveys holographic information. The connection of the polycarbonate carrier foil (5) of the security thread with the polycarbonate layer (10; 11; 12) of the data carrier adjoining said carrier foil takes place without using an adhesive or primer.
Claims22
A multilayer security thread for a data carrier, the security thread comprising:
- a carrier foil having a first surface and a second surface, wherein
- a coating including a holographic information item is formed on the first surface, and
- the second surface includes a thermoplastic layer configured to be bonded in direct contact with an adjoining layer of the data carrier by hot lamination, the adjoining layer of the data carrier being a polycarbonate layer, a polyethylene terephthalate glycol copolymer (PETG) layer, or a polyvinyl chloride (PVC) layer, wherein
- the thermoplastic layer of the second surface comprises a polycarbonate layer, a polyethylene terephthalate glycol copolymer (PETG) layer, or a polyvinyl chloride (PVC) layer so as to have a same composition as the adjoining layer of the data carrier that includes the polycarbonate layer, polyethylene terephthalate glycol copolymer (PETG) layer, or polyvinyl chloride (PVC) layer of the data carrier,
- the thermoplastic layer is a non-adhesive layer,
- the thermoplastic layer is configured to be bonded in direct contact with the polycarbonate layer, polyethylene terephthalate glycol copolymer (PETG) layer, or polyvinyl chloride (PVC) layer of the data carrier without any adhesive or primer between the thermoplastic layer and the polycarbonate layer, and
- wherein a thickness of the carrier foil lies in a range of 20 μm to 50 μm.
4 more elements
A multilayer data carrier comprising:
- a carrier layer including a polycarbonate layer, a polyethylene terephthalate glycol copolymer (PETG) layer, or a polyvinyl chloride (PVC) layer;
- a transparent cover layer;
- and,
- a multilayer security thread adjoining the carrier layer and the transparent cover layer, wherein
- the security thread includes a carrier foil with a first surface and a second surface opposite the first surface,
- the security thread includes an optically variable coating including a holographic information item formed on the first surface,
- the second surface includes a thermoplastic layer, the thermoplastic layer of the second surface being a non-adhesive layer,
- the thermoplastic layer is bonded in direct contact with an adjoining layer of the data carrier by hot lamination, the adjoining layer of the data carrier being a polycarbonate layer, a polyethylene terephthalate glycol copolymer (PETG) layer, or a polyvinyl chloride (PVC) layer,
- the thermoplastic layer of the second surface comprises a polycarbonate layer, a polyethylene terephthalate glycol copolymer (PETG) layer, or a polyvinyl chloride (PVC) layer so as to have a same composition as the adjoining layer of the data carrier that includes the polycarbonate layer, polyethylene terephthalate glycol copolymer (PETG) layer, or polyvinyl chloride (PVC) layer of the data carrier,
- the thermoplastic layer of the second surface of the carrier foil is directly bonded to and in direct contact with the polycarbonate layer, polyethylene terephthalate glycol copolymer (PETG) layer, or polyvinyl chloride (PVC) layer of the carrier without any adhesive or primer between the thermoplastic layer and the polycarbonate, and
- wherein a thickness of the carrier foil lies in a range of 20 μm to 50 μm.
8 more elements
Dependencies are inferred from the claim text.