Identity card with incorporated fibrids

• US 4,324,421 A
• Filed: 12/19/1979
• Issued: 04/13/1982
• Est. Priority Date: 12/30/1978
• Status: Expired due to Term

• Current Assignee: Hoechst AG Frankfurt Main Germany
• Original Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Inventors: Steinau, Peter, Moraw, Roland, Pierson, Fritz
• Primary Examiner(s): Bell, Paul A.
• Assistant Examiner(s): Brown, John S.
• Application Number:
  US06/105,147
• Time in Patent Office: 846 Days
• Field of Search: 40/2.2, 428/280, 428/281, 428/288, 428/296, 428/325, 428/900, 428/915, 428/916, 283/7, 283/8, 283/9
• US Class Current: 283/75
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres vinyl or acrylic copolymers B32B2262/0223 or B32B2262/0246
• CPC Class Codes: B32B 2305/08 Reinforcements
• CPC Class Codes: B32B 2305/38 Meshes, lattices or nets
• CPC Class Codes: B32B 2307/734 Dimensional stability
• CPC Class Codes: B32B 2425/00 Cards, e.g. identity cards, credit cards
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 5/26 another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: B42D 2033/04 Transparent material
• CPC Class Codes: B42D 2033/22 Perforated or incised material
• CPC Class Codes: B42D 2033/28 Paper or card board
• CPC Class Codes: B42D 2033/32 Other material
• CPC Class Codes: B42D 2035/02 Nature of the markings
• CPC Class Codes: B42D 2035/06 Picture of the user
• CPC Class Codes: B42D 2035/08 Alphanumerical data
• 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 25/23 Identity cards
• CPC Class Codes: B42D 25/346 Perforations
• CPC Class Codes: B42D 25/351 Translucent or partly translucent parts, e.g. windows
• CPC Class Codes: B42D 25/455 : using heat
• CPC Class Codes: B42D 25/46 : using pressure
• CPC Class Codes: Y10S 428/916 : Fraud or tamper detecting

Abstract

An identity card comprising at least one outer transparent thermoplastic covering layer and a thermoplastic core layer; said card carrying at suitable points on at least one layer information which serves to identify the cardholder; said card further carrying security markings, such as guilloche figures, as a protection against forgeries; said core layer comprising incorporated fibrids. In a preferred embodiment, the core layer is a paper felt enriched with at least 80% by weight fibrids of a polyolefin, such as polyethylene, and comprising from 8 to 14% by weight pigment material, such as titanium dioxide. The core layer may also be provided with a reinforcing layer, such as a randomly perforated paper or polyester film, which is dimensionally stable during lamination of the layers under pressure at elevated temperatures of up to 180° C.

Claims

1. An identity card comprising:

(a) at least one outer transparent covering layer and

(b) a thermoplastic core,

said core being produced from a core material comprising fusible thermoplastic fibrids having a specific surface of at least 1 m² per gram measured by the BET method;

said core material being printable by printing techniques wherein a toner image is produced thereon;

said core further comprising a reinforcing layer which is perforated with holes and is dimensionally stable at a temperature at which said core material is fusible;

said core material being laminated through the holes in said reinforcing layer;

said reinforcing layer providing dimensional stability for said fusible core material during laminating;

(c) said card carrying at suitable points on at least one of the component parts thereof information serving to identity the cardholder and security markings for protecting against forgeries.

2. An identity card according to claim 1, wherein said core layer comprises paper enriched with polyolefin fibers.

3. An identity card according to claim 2, wherein the polyolefin fiber-containing paper is satinized, and said information is applied thereto electrographically by means of recording electrodes.

4. An identity card according to claim 1, wherein said core comprises a paper felt comprising a material selected from the group consisting of polyethylene fibers and polyethylene fibrids.

5. An identity card according to claim 4, wherein said paper comprises at least 50% by weight polyethylene fibers.

6. An identity card according to claim 5, wherein said paper comprises at least 80% by weight polyethylene fibers.

7. An identity card according to any one of claims 4-6, wherein said paper felt comprises from 8 to 14% by weight pigment particles.

8. An identity card according to claim 1, wherein said reinforcing layer is perforated with holes having a diameter from about 0.5 mm to about 2 mm, the distance between centers of adjacent holes being about three times the radii of the holes.

9. An identity card according to claim 8, wherein said reinforcing layer comprises perforations arranged in random patterns as security markings.

10. An identity card according to claim 1, wherein the material of said reinforcing layer is dimensionally stable during assembly of the layers by lamination under pressure at elevated temperatures up to 180°

C.

11. An identity card according to claim 1, wherein said reinforcing layer comprises a polyester film.

12. An identity card according to claim 1, wherein said reinforcing layer comprises a mesh screen.

13. An identity card according to claim 1, wherein said security markings comprise at least one guilloche figure.

14. An identity card according to any one of claims 1-6 or 8-12 wherein said covering layer is a paper felt comprising at least 80% by weight polyethylene fibers.

15. An identity card according to any one of claims 1-6 or 8-12 wherein information or a security marking is applied to the inside of said covering layer.

16. An identity card according to claim 1, wherein said core comprises paper enriched with polyethylene fibrids.

17. An identity card according to claim 16, wherein said core comprises from 8 to 14% by weight pigment particles.