Method of making an information carrying card comprising a cross-linked polymer composition
The disclosure provides a cross-linkable polymer composition, a core layer for an information carrying card comprising such cross-linked composition, resulting information carrying card, and methods of making the same. A crosslinkable polymer composition comprises a curable base polymer resin in a liquid or paste form, and a particulate thermoplastic filler. The base polymer resin is selected from the group consisting of urethane acrylate, silicone acrylate, epoxy acrylate, urethane, acrylate, silicone and epoxy. The particulate thermoplastic filler may be polyolefin, polyvinyl chloride (PVC), a copolymer of vinyl chloride and at least another monomer, or a polyester such as polyethylene terephthalate (PET), a compound or blend thereof.
1. A method for forming a core layer of an information carrying card, comprising:
providing at least one thermoplastic layer defining at least one cavity therein, each cavity having a continuous surface defined by and inside the at least one thermoplastic layer;
disposing an inlay layer comprising at least one electronic component partially or fully into the at least one cavity;
dispensing a crosslinkable polymer composition into the at least one cavity and contacting the at least one electronic component, the crosslinkable polymer composition comprising a base polymer resin selected from the group consisting of urethane acrylate, ester acrylate, silicone acrylate, epoxy acrylate, methacrylate, silicone, urethane and epoxy; and
placing a breathable release film over the inlay layer after dispensing the crosslinkable polymer composition into the at least one cavity to form a sandwich structure.
2. The method of claim 1 further comprising:
providing another release film; and
placing the at least one thermoplastic layer above the release film before disposing the inlay layer into the at least one cavity.
3. The method of claim 1 further comprising:
pressing the sandwich structure under a pressure less than 2 MPa.
4. The method of claim 3 further comprising:
heating the sandwich structure at a raised temperature under the pressure to cure the crosslinkable polymer composition.
5. The method of claim 4 wherein the raised temperature is less than 150° C.
6. The method of claim 2 further comprising:
peeling off the release films to provide the core layer.
7. The method of claim 1 , wherein the crosslinkable polymer composition comprises a thermoplastic filler.
8. The method of claim 1 , wherein the breathable release film is a silicone coated paper.
9. The method of claim 1 further comprising:
forming a plurality of holes by cutting a plurality of portions of a supporting film without damages to any wire or integrated circuit on the inlay layer, before disposing the inlay layer into the at least one cavity on the first thermoplastic layer.
10. The method of claim 9 further comprising:
fixing the inlay layer onto the at least one thermoplastic layer by applying an instant adhesive in the plurality of holes of the inlay layer, before dispensing the crosslinkable polymer composition.
11. The method of claim 10 wherein the instant adhesive comprises cyanoacrylate.
12. The method of claim 1 wherein forming the at least one thermoplastic layer comprises:
die-cutting one or more thermoplastic films; and
laminating the one or more thermoplastic films under a heating condition.
13. The method of claim 1 wherein the at least one cavity on the at least one thermoplastic layer has a size larger than a size of the inlay layer.
14. The method of claim 1 wherein the at least one cavity on the at least one thermoplastic layer has a size substantially the same as a size of the inlay layer.
15. The method of claim 1 wherein the at least one cavity on the at least one thermoplastic layer has a size substantially the same as a size of a portion of the inlay layer.
16. The method of claim 1 wherein the at least one thermoplastic layer comprises a thermoplastic material selected from the group consisting of polyvinyl chloride, copolymer of vinyl chloride, polyolefin, polycarbonate, polyester, polyamide, and acrylonitrile butadiene styrene copolymer (ABS).
17. The method of claim 1 wherein the base polymer resin in the crosslinkable polymer composition is urethane acrylate or epoxy.
18. The method of claim 1 further comprising curing the crosslinkable polymer under a UV light.
19. A method for fabricating an information carrying card, comprising forming a core layer of the information carrying card according to claim 1 .
20. A method of claim 19 further comprising laminating a printable thermoplastic film on each side of the core layer of the information carrying card; and laminating a transparent thermoplastic film on the printable thermoplastic film each side of the core layer of the information carrying card.