Platic card

• US 20040026518A1
• Filed: 05/02/2003
• Published: 02/12/2004
• Est. Priority Date: 09/05/2001
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Matsumura, Shinichi, Kudo, Takao, Asaoka, Satoko
• Granted Patent: US 6,848,622 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B42D 25/00 Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof printing processes to produce identification or security features B41M3/14
• CPC Class Codes: B42D 25/369 Magnetised or magnetisable materials
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs

Abstract

In a plastic card (10) for an embossing finish comprising a core material (12) and a sheath material (13), a breaking elongation of the core material (12) is 25% or less and a breaking elongation of the sheath material (13) is 130% or more. The ratio of the thickness of the core material to the thickness of the sheath material (13) occupied in the entire part of the plastic card is set to 20 to 53: 10. Otherwise, a breaking elongation of the core material (12) is 50 % or less and the tensile strength of the sheath material (13) is 100 MPa or more. The ratio of the thickness of the sheath material (13) to the thickness of the core material (12) occupied in the entire part of the card is set to 41 to 90: 10. The breaking elongation of the core material (12) and the sheath material (13) or the tensile strength of the sheath material (13), and the ratio of thickness of the core material (12) to the sheath material (13) are adjusted so that the plastic card excellent in embossing characteristics and hardly generating cracks due to a repetitive bending fatigue is provided.

Claims

1. A plastic card having a core material and a sheath material, wherein a breaking elongation of the core material is 25% or less, a breaking elongation of the sheath material is 130% or more, and the ratio of the thickness of the core material relative to the thickness 10 of the sheath material occupied in all of the card is set to 20 to 53.

2. The plastic card according to claim 1, wherein the core material has at least a pair of core sheets bonded through a circuit board and the sheath material has at least a pair of outer layer sheets bonded through the core material.

3. The plastic card according to claim 1, wherein at least the one pair of core sheets and at least the one pair of outer layer sheets are symmetrically disposed on the circuit board located as a center.

4. The plastic card according to claim 1, wherein the core material and the sheath material are made of a non-vinyl chloride resin or a polymer alloy of a non-vinyl chloride resin including inorganic filler.

5. The plastic card according to claim 1, wherein an embossing finish is applied to the sheath material.

6. The plastic card according to claim 1, wherein a magnetic stripe is provided on the sheath material.

7. The plastic card according to claim 1, wherein integrated circuit chips are provided in the core material.

8. A plastic card having core material layers provided on both the surfaces of a circuit board and sheath material layers provided outside of the core material layers, wherein each of the core material layers and the sheath material layers is made of a material a non-vinyl chloride resin or a polymer alloy of a non-vinyl chloride resin to which inorganic filler is added, and the sheath material layer is thinner than the core material layer and has a breaking elongation higher than that of the core material layer and an embossing finish applied.

9. The plastic card according to claim 8, wherein the core material layer and the sheath material layer provided on one surface side and the core material layer and the sheath material layer provided on the other surface side are symmetrically provided on the circuit board located as a center.

10. The plastic card according to claim 8, wherein a magnetic stripe is provided on the sheath material layer.

11. The plastic card according to claim 8, wherein integrated circuit chips are provided on the core material layer.

12. A plastic card including a core material and a sheath material, wherein a breaking elongation of the core material is 50% or less, a tensile strength of the sheath material is 100 MPa or more, and the ratio of the thickness of the core material relative to the thickness of the sheath material occupied in all of the card is set to 41 to 90:

10.

13. The plastic card according to claim 12, wherein the core material has at least a pair of core sheets bonded through a circuit board and the sheath material has at least a pair of outer layer sheets bonded through the core material.

14. The plastic card according to claim 13, wherein at least the one pair of core sheets and at least the one pair of outer layer sheets are symmetrically disposed on the circuit board located as a center.

15. The plastic card according to claim 12, wherein the core material and the sheath material are made of a non-vinyl chloride resin or a polymer alloy of a non-vinyl chloride resin.

16. The plastic card according to claim 15, wherein the core material is made of a non-vinyl chloride resin or a polymer alloy of a non-vinyl chloride resin including an inorganic filler and the sheath material is composed of a drawn sheet made of the non-vinyl chloride resin or the polymer alloy of the non-vinyl chloride resin.

17. The plastic card according to claim 12, wherein an embossing finish is applied to the sheath material.

18. The plastic card according to claim 12, wherein a magnetic stripe is provided on the sheath material.

19. The plastic card according to claim 12, wherein integrated circuit chips are provided on the core material.