Information carrying card comprising a cross-linked polymer composition, and method of making the same
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; and
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
a particulate thermoplastic filler,
wherein providing 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.
2. The method of claim 1 further comprising:
providing a 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 2 further comprising:
placing another release film over the inlay layer after dispensing the crosslinkable polymer composition into the at least one cavity to form a sandwich structure.
4. The method of claim 3 wherein at least one of the release films is a breathable release film.
5. The method of claim 3 further comprising:
pressing the sandwich structure under a pressure.
6. The method of claim 5 further comprising:
heating the sandwich structure at a raised temperature under the pressure;
cooling the sandwich structure; and
peeling off the release films.
7. The method of claim 5 wherein the raised temperature is less than 150° C.
8. 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 of the at least one electronic component, before disposing the inlay layer into the at least one cavity.
9. The method of claim 8 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.
10. The method of claim 9 wherein the instant adhesive comprises cyanoacrylate.
11. The method of claim 1 wherein the at least one cavity on the at least one thermoplastic layer has a size being larger than that of the inlay layer.
12. The method of claim 1 wherein the at least one cavity on the at least one thermoplastic layer has a size being substantially the same as that of the inlay layer.
13. 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 that of a portion of the inlay layer.
14. The method of claim 3 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).
15. The method of claim 3 wherein the base polymer resin in the crosslinkable polymer composition comprises urethane acrylate or epoxy.
16. The method of claim 3 wherein the particulate thermoplastic filler in the crosslinkable polymer composition comprises a material selected from the group consisting of PVC, a copolymer of vinyl chloride and at least another monomer, and polyethylene terephthalate (PET).
17. The method of claim 16 wherein the particulate thermoplastic filler in the crosslinkable polymer composition comprises a copolymer of vinyl chloride and at least another monomer selected from the group consisting of vinyl ester, vinyl acetate and vinyl ether.
18. The method of claim 17 wherein the particulate thermoplastic filler in the crosslinkable polymer composition is a PVC modified with a copolymer of vinyl chloride and at least another monomer selected from the group consisting of vinyl ester, vinyl acetate and vinyl ether.
19. The method of claim 5 further comprising curing the crosslinkable polymer under a UV light.
20. A method for fabricating an information carrying card, comprising forming a core layer of the information carrying card according to claim 1 .
21. A method of claim 20 further comprising laminating a printable thermoplastic film on each side of the core layer of the information carrying card.
22. A method of claim 21 further comprising laminating a transparent thermoplastic film on the printable thermoplastic film each side of the core layer of the information carrying card.
23. The method of claim 1 wherein the at least one electronic component in the inlay layer comprises at least one integrated circuit (IC), wherein the at least one integrated IC is partially or fully disposed inside the at least one cavity.
24. The method of claim 1 wherein the inlay layer further comprises a piece of metal or ceramic.