Apparatus and method for making information carrying cards through radiation curing, and resulting products
A method forms an information carrying card or a core layer of an information carrying card using a radiation curing, and an apparatus configured to provide such a radiation curing. The method includes providing a carrier layer that defines at least one cavity, providing an inlay layer supporting at least one electronic component, and positioning at least a portion of the inlay layer in the at least one cavity. The method further comprises dispensing a radiation crosslinkable polymer composition over the inlay layer, and irradiating the radiation crosslinkable polymer composition.
1. A method for forming a core layer of an information carrying card, comprising steps of:
providing a carrier layer that defines at least one cavity therein, each cavity having a bottom wall surface and a side wall surface defined by and being inside the carrier layer, the bottom wall surface fully covering a bottom side of the at least one cavity;
providing an inlay layer supporting at least one electronic component;
positioning at least a portion of the inlay layer in the at least one cavity;
dispensing a radiation crosslinkable polymer composition over the inlay layer after the step of positioning; and
irradiating the radiation crosslinkable polymer composition by using an apparatus comprising:
at least one support layer having both a plurality of ribs and a plurality of channels between two adjacent ribs;
a plurality of radiation sources disposed in each respective channel and configured to provide radiation; and
a radiation transparent layer coupled with the at least one support layer and configured to protect the plurality of radiation sources.
2. The method of claim 1 wherein in the step of irradiating the radiation crosslinkable polymer composition,
the carrier layer, the inlay and the radiation crosslinkable composition are pressed under a pressure; and
the radiation crosslinkable polymer composition is irradiated using radiation emitted toward at least one side of the carrier layer.
3. The method of claim 2 , wherein the radiation crosslinkable polymer composition is irradiated using radiation emitted toward two sides of the carrier layer.
4. The method of claim 2 , wherein the pressure is in the range of from 0.01 MPa to 3 MPa.
5. The method of claim 2 , wherein the radiation crosslinkable polymer composition is irradiated using at least one of visible light, ultraviolet (UV), infrared (IR) and electronic beam (EB).
6. The method of claim 2 , wherein additional heat is used in the step of irradiating the radiation crosslinkable polymer composition.
7. A method for fabricating an information carrying card, comprising forming a core layer of the information carrying card according to claim 1 .
8. A method of claim 7 further comprising laminating at least one thermoplastic film on each side of the core layer of the information carrying card.
9. A method of claim 7 further comprising bonding at least one thermoplastic film on each side of the core layer of the information carrying card.
10. A method of claim 7 , wherein the inlay layer comprises at least one electronic component being heat sensitive.
11. The method of claim 1 further comprising:
directly printing words or images onto a surface of a crosslinked polymer composition formed from the radiation crosslinkable polymer composition.
12. The method for claim 11 , wherein a portion of the crosslinked polymer composition is disposed over a top surface of the carrier layer.
13. The method of claim 1 , wherein the apparatus comprises a bottom portion and a top portion, each of the bottom portion and the top portion includes a plurality of ribs, a plurality of channels, and a plurality of radiation sources disposed in each respective channel.
14. The method of claim 13 , wherein the plurality of channels in the top portion and in the bottom portion are oriented in different directions.
15. The method of claim 1 , wherein
the carrier layer is a first thermoplastic layer comprising at least one thermoplastic material.
16. The method of claim 1 , wherein
the radiation crosslinkable polymer composition comprises a curable precursor, the curable precursor selected from the group consisting of acrylate, methacrylate, urethane acrylate, silicone acrylate, epoxy acrylate, methacrylate, silicone, urethane and epoxy; and
the radiation crosslinkable polymer composition is a liquid or a paste.
17. The method of claim 1 further comprising
applying vacuum to the radiation crosslinkable polymer composition.
18. The method of claim 1 further comprising
disposing a second thermoplastic layer above the carrier layer after applying the radiation crosslinkable polymer composition over the inlay layer.
19. The method for claim 1 further comprising:
providing a release film above the carrier layer after dispensing the radiation crosslinkable polymer composition over the inlay layer.