CN101269610A - Optical false proof element and product having the false proof element - Google Patents

Abstract

An optic anti-counterfeiting component for high-security anti-counterfeiting products and high-additional-value products such as banknotes, credit cards, passports, securities, etc, comprises an interference light-variation layer (2), a diffraction light-variation image (3) covering at least part of the interference light-variation layer (2), and a metallic reflection layer (4), wherein, part of the metallic reflection layer (4) covers the diffraction light-variation image (3) so that a metal covered part (5) and a non-metal covered part (6) are formed; the metal covered part (5) has the characteristics of the diffraction light-variation, and the non-metal covered part (6) has the characteristics of the interference light-variation or the light-variation characteristics integrating the diffraction with the interference. Due to the metal covered part (5) and the non-metal covered part (6), the optic anti-counterfeiting component can show the pattern including distinguished marks, signs, characters, etc. The optic anti-counterfeiting component is especially applied to the window safe-line of the banknotes.

Description

A kind of optical anti-counterfeiting element and have the product of this Security element

Technical field

The present invention relates to be applicable to a kind of optical anti-counterfeiting element of all kinds of high safety products such as banknote, credit card, passport, marketable securities and high value added product, and relate to the product that has this Security element, specifically, relate to a kind of Security element that interference light becomes feature and diffraction light change feature that has simultaneously, and further relate to the product that has this Security element, for example use banknote or the cheque paper of this Security element as opened window safety line.

Background technology

The application of optical anti-counterfeiting technology in contour demand for security product of banknote, credit card, passport and marketable securities and high value added product is very extensive, and has obtained extraordinary effect.

The optical anti-counterfeiting technology adopts diffraction light change image usually and interferes light variation image to realize false proof purpose.

Diffraction light change image, such as hologram, dynamic diffraction etc., its optical texture is the diffraction grating of relief type, utilizes its diffraction reproduced image.This image can have stereoeffect, dynamic change, change color etc. with as popular anti-counterfeiting characteristic, can have implicit pattern, coding pattern etc. again and be used as professional and expert's anti-counterfeiting characteristic.This class anti-fake product is made by adopting mould pressing process that diffraction structure is transferred on the basement membrane usually.

Mould pressing process has two kinds, and the one, be coated with mold pressing on the basement membrane of metallic reflector (being called hard pressure); The one, do not having mold pressing on the basement membrane of metallic reflector (being called soft pressure), and then whether determining the plating reflecting layer according to product requirement.Metallic reflector can improve the brightness of diffraction light change image greatly.

The metal of metallic reflector is aluminium normally, also can be other metal, such as silver, nickel, copper etc.Metallic reflector can be continuous, and cover whole diffraction light change image fully; Also can be discontinuous and cover part diffraction light change image, wherein cover part and unmasked portion form patterns such as character, sign, sign.

GB 2,136, and 352 disclose a kind of Security element that has the diffraction light change image of above-mentioned metal pattern.Basement membrane can be single plastic sheeting, also can be to have to be used to improve the mold pressing imaging layer of diffraction light change image quality and the plastic sheeting of other functional layers.According to the requirement and the environment for use of product, can be chosen on the metallic reflector that processes the coating protective layer or be covered with diaphragm, to improve the stability of product.

Interfering light variation image, is the image that the change color of utilizing the interference effect of optical film structure to produce forms.It is compared with diffraction light change image, and the change color contrast is strong, differentiates easily.Interference light becomes image technique and utilizes pearl printing ink, photochromatic printing ink, single or multiple lift blooming, composite plastic film to wait and realize usually.The different single layer optical film of optical thickness has different color change effects, adds in the printing ink and just constitutes pearl printing ink and this blooming is broken into fractionlet.Multi-layer optical film comprises deielectric-coating and medium/metal film.

Deielectric-coating can be the assembly of thin films structure that high refractive index medium and low refractive index dielectric replace, and for example Chinese patent discloses a kind of multilayer dielectric film No. 00814584.9.Typical medium/metal film comprises three-decker, is followed successively by absorbed layer, dielectric layer and reflecting layer from top to bottom.Absorbed layer is metal (perhaps metallic compound) layers of several nanometers to tens nanometer thickness; Dielectric layer is the transparent dielectric layer with certain optical thickness, and itself can be the sandwich construction of different medium; The reflecting layer also is a metal level, and it can adopt the metal identical or different with absorbed layer (the most frequently used is aluminium).Wherein, absorbed layer is very thin, guarantees that light can see through.And different with absorbed layer be that thicker tens nanometers that are generally in reflecting layer can not allow light see through to several microns.The reflecting layer can be discontinuous, and the metal part is divided patterns such as forming character, sign, sign with no metal part.Chinese patent discloses the multiple layer metal/deielectric-coating of different structure for No. 99809993.7 and No. 00818424.0.Multilayer film is broken into fractionlet as just constituting photochromatic printing ink in the pigment adding printing ink, and Chinese patent application discloses a kind of method of making photochromatic printing ink pigment No. 97194750.3.

Chinese patent No. 00810089.6 and No. 00818424.0, and Chinese patent application has the optical anti-counterfeiting element that interference light becomes feature and diffraction light change feature when disclosing multiple different structure for No. 03802372.5.Their common feature is to have substituted metallic reflector in the common diffraction light change image element with optical interference coating, perhaps interferes light variation image and diffraction light change image to be positioned at the both sides of a hyaline layer or film.These structures make diffraction light change feature and the interference light change feature in the same area occur simultaneously, can produce some unique optical effects.But, in all said structures, there is not the independent reflecting layer that belongs to diffraction light change image, if optical interference coating is the medium/metal film, the shared metallic reflector of diffraction structure and inteferometer coating then.

Summary of the invention

For overcoming the defective of prior art, the invention provides a kind of, phenomenon different with the existing product structure obviously difference, have a Security element that interference light becomes feature and diffraction light change feature simultaneously.The interference light of described element becomes feature and the diffraction light change feature is not disturbed mutually, outstanding advantage anti-counterfeiting characteristic separately.

One aspect of the present invention provides a kind of optical anti-counterfeiting element, described optical anti-counterfeiting element comprises interference light change layer, covers the diffraction light change image and the metallic reflector of this interference light change layer to small part, thereby this metallic reflection layer segment covers described diffraction light change image and forms metal cover part and no metal cover part, wherein said metal cover part presents the diffraction light change feature, and described no metal cover part presents interference light change feature or diffraction and interferes comprehensive light to become feature.

In one embodiment, diffraction light change image and metallic reflector all are positioned at interference light change layer top.

In a preferred embodiment, optical anti-counterfeiting element of the present invention also comprises the mold pressing imaging layer, and the diffraction light change image mold pressing is formed at the surface of mold pressing imaging layer.

In another preferred embodiment, optical anti-counterfeiting element of the present invention also comprises transparent dielectric layer, and more preferably this transparent dielectric layer becomes between layer and the metallic reflector at interference light.

In a preferred embodiment, interference light of the present invention becomes layer and is made of the material with interference light change feature, include but not limited to pearl printing ink, photochromatic printing ink, single or multiple lift blooming, composite plastic film, and other has the material that interference light becomes feature.

The material of metallic reflector of the present invention can be aluminium, silver, copper, tin, chromium, nickel, titanium etc. and their alloy, is preferably aluminium.

In a preferred embodiment of the invention, described metal cover part and no metal cover part form patterns such as distinguishable sign, mark, character.

In another preferred embodiment, described diffraction light change image and/or interference light become layer itself also can have patterns such as distinguishable sign, mark, character.

In some preferred embodiment, described metallic reflector top also can further be provided with protective layer or diaphragm.

In other preferred embodiment, optical anti-counterfeiting element of the present invention can also comprise and is used for machine-readable magnetic medium layer.

Optical anti-counterfeiting element of the present invention can be forms such as label, sign, wide, safety line, and can stick on the various article by various bonding mechanisms, for example transfer on banknote, the contour safety product of credit card and the high value added product by thermoprint or adhesive sticker mode.Also the Security element of the present invention of safety line form can be partially submerged into and make the cheque paper that has opened window safety line in the paper.

Another aspect of the present invention provides the product that has optical anti-counterfeiting element of the present invention, include but not limited to all kinds of high safety products and high value added products such as banknote, credit card, passport, marketable securities, and each wrapping paper, packing box etc., preferred banknote is bank note, marketable securities and cheque paper particularly.

In a preferred embodiment, described product comprises body and optical anti-counterfeiting element of the present invention.More preferably, this Security element is arranged in described body surface or is partially submerged into described body at least.Particularly preferably, described Security element is partially submerged in the described body and forms opened window safety line.

In a further preferred embodiment, described product is be opened window safety line with optical anti-counterfeiting element of the present invention banknote or a cheque paper.

Description of drawings

Fig. 1 to Fig. 7 is the schematic diagram of several preferred embodiments of the present invention.

The specific embodiment

In order to understand the present invention better, will make more detailed description with reference to the accompanying drawings to various aspects of the present invention.Be appreciated that described drawings and detailed description are the description to the preferred embodiment of the invention, but not limit the scope of the invention by any way.

What Fig. 1 showed is the schematic cross-section of the layer structure of the present invention's first preferred embodiment, is followed successively bymetallic reflector 4, diffractionlight change image 3 and interference light from top to bottom and becomes layer 2.Diffractionlight change image 3 covers the part surface at least that interference light becomeslayer 2, andmetallic reflector 4 parts cover diffractionlight change image 3, formsmetal cover part 5 and no metal cover part 6.Wherein,metal cover part 5 presents the diffraction light change feature, and nometal cover part 6 presents interference light and becomes feature or diffraction and interfere comprehensive light to become feature.

Diffractionlight change image 3 generally is to transfer to described interference light by mould pressing process to becomelayer 2 lip-deep.

Metal cover part 5 and nometal cover part 6 are preferably formed patterns such as distinguishable sign, mark, character.

The material ofmetallic reflector 4 can be aluminium, silver, copper, tin, chromium, nickel, titanium etc., and their alloy, is preferably aluminium.

The typical method that formsmetallic reflector 4 is that vacuum evaporation obtains complete metal level, and the pattern according to design requires printing protection glue on metal level then, and the applied chemistry method is removed the metal of not protection part.Also can adopt other anyly can access that there is metal the part and remainder does not have the preparation method of the metal level of metal.

It can be by pearl printing ink, photochromatic printing ink, single or multiple lift blooming, composite plastic film that interference light becomeslayer 2, and other have interference light and become that materials of feature constitute.Interference light becomes the medium/metal film of a preferred version oflayer 2 into three-decker, and its structure is followed successively by absorbed layer, dielectric layer and reflecting layer from top to bottom.

Interference light becomes in thelayer 2 also can have patterns such as distinguishable sign, mark, character.Such as, if becominglayer 2, interference light forms by printing ink, these patterns can be with pearl printing ink or photochromatic printing ink printing formation so; If it is film formed by optical interference that interference light becomeslayer 2, these patterns can be that different parts because of inteferometer coating has heterogeneity and forms so, also can form by remove part or all of rete at some position.

What Fig. 2 showed is second preferred embodiment of the present invention.Different with scheme shown in Figure 1 is that this optical anti-counterfeiting element also comprises substrate 1.Substrate 1 has first surface and second surface on the other side (being shown as upper surface and lower surface among the figure), wherein interferencelight change layer 2 is formed on the first surface, and be coated withadhesive phase 7 on the second surface, with convenient this Security element is sticked on the target item.

In a further preferred embodiment, can adopt various conventional methods onsubstrate 1, to form interference light and becomelayer 2, include but not limited to modes such as printing, coating and evaporation.

What Fig. 3 showed is the 3rd preferred embodiment of the present invention.What the scheme that shows with Fig. 2 was different is, becoming at interference light has increased the quality that mold pressingimaging layer 8 is used to improve diffraction light change image on thelayer 2, and diffractionlight change image 3 mold pressings are formed on the surface of moldpressing imaging layer 8.

What Fig. 4 showed is the 4th preferred embodiment of the present invention.Interference light becomeslayer 2 and is positioned on the second surface ofsubstrate 1, and is coated with diffractionlight change image 3 to small part on the first surface ofsubstrate 1, andmetallic reflector 4 parts cover diffractionlight change image 3, and becomeslayer 2 at interference light and haveadhesive phase 7.

What Fig. 5 showed is the 5th preferred embodiment of the present invention.Different with Fig. 4 scheme is, has increased mold pressingimaging layer 8 onsubstrate 1 first surface, and diffractionlight change image 3 mold pressings are formed on the surface of mold pressingimaging layer 8.

In the above-described embodiment, for make Security element in use diffraction light change image be protected, be unlikely to impaired, can onmetallic reflector 4, be coated with protective layer or covered with protective film (not shown).

What Fig. 6 showed is the 6th preferred embodiment of the present invention, and thesubstrate 1 that wherein has the diffractionlight change image 3 that is covered bymetallic reflector 4 parts on the second surface and interference light becomelayer 2 and be combined with each other by transparent dielectric layer 10.Wherein,substrate 1 is a plastic foil, and interference light becomeslayer 2 into having the film of interference light change feature, and reaching transparentdielectric layer 10 is substratum transparent, and also can be provided with mold pressingimaging layer 8 betweensubstrate 1 and the diffraction light change image 3.From technical process, this structure is to interfere light variation image to be made on different films respectively with diffraction light change image, then with image surface to combine with substratum transparent together.The film of these structure both sides has than the effect of protective layer better protection the image that is clipped in the middle.

What Fig. 7 showed is the 7th preferred embodiment of the present invention.Be followed successively bysubstrate 1,peel ply 9 from top to bottom, mold pressingimaging layer 8, diffractionlight change image 3,metallic reflector 4, interference light becomelayer 2 andadhesive phase 7.

The Security element that this scheme is made can be transferred on the target item by hot stamping process, and after the thermoprint,substrate 1 is stripped from.In order to protect the Security element after the thermoprint in use not to be damaged, can matcoveredn betweenpeel ply 9 and mold pressing imaging layer 8.Betweenmetallic reflector 4 and interferencelight change layer 2, transparentdielectric layer 10 can also be arranged.

In above all embodiment, described Security element can further comprise and be used for machine-readable magnetic medium layer (not shown).Be positioned at interference light such as the magnetic medium layer and become below thelayer 2, the magnetic medium layer can not influence visual effect of the present invention like this.

Substrate 1 of the present invention,adhesive phase 7, mold pressingimaging layer 8,peel ply 9, transparentdielectric layer 10, magnetic medium layer and protective layer (film) all are to adopt conventional material and the method that is used for this type of purposes well known in the art to prepare.

Some preferred embodiment of the present invention has below exemplarily been described.And will be understood by those skilled in the art that under the prerequisite that does not depart from design of the present invention and spirit and can make various equivalents or modification to it.And the technical scheme that so obtains also should belong to scope of the present invention.

Claims (17)

1. optical anti-counterfeiting element, comprise that interference light becomes layer (2), covers the diffraction light change image (3) and the metallic reflector (4) of interference light change layer (2) to small part, metallic reflector (4) part covers diffraction light change image (3) thereby forms metal cover part (5) and no metal cover part (6), it is characterized in that

Metal cover part (5) presents the diffraction light change feature, and no metal cover part (6) presents interference light and becomes feature or diffraction and interfere comprehensive light to become feature.

2. optical anti-counterfeiting element according to claim 1, wherein said diffraction light change image (3) and metallic reflector (4) all are positioned at the top that described interference light becomes layer (2).

3. optical anti-counterfeiting element according to claim 1 and 2 also comprises mold pressing imaging layer (8), and wherein said diffraction light change image (3) mold pressing is formed on the surface of described mold pressing imaging layer (8).

4. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-3, also comprise transparent dielectric layer (10), preferably described transparent dielectric layer (10) is positioned at described interference light and becomes between layer (2) and the metallic reflector (4).

5. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-4, wherein said metal cover part (5) and no metal cover part (6) form the distinguishable pattern that is selected from sign, mark and character.

6. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-5, the material of wherein said metallic reflector (4) is selected from aluminium, silver, copper, tin, chromium, nickel, titanium and their alloy, is preferably aluminium.

7. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-6, wherein said metallic reflector (4) top also is provided with protective layer or diaphragm.

8. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-7, wherein said interference light becomes layer (2) and constitutes by being selected from following material:

Pearl printing ink, photochromatic printing ink, single or multiple lift blooming, composite plastic film and other have the material that interference light becomes feature.

9. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-8, wherein said interference light becomes layer (2) and is three-layer metal/dielectric-coating structure, is followed successively by absorbed layer, dielectric layer and reflecting layer from top to bottom.

10. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-9, wherein said diffraction light change image (3) and/or interference light become layer (2) and itself also have the distinguishable pattern that is selected from sign, mark and character.

11. according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-10, also comprise the magnetic medium layer, it is positioned at the below that described interference light becomes layer (2).

12., be label, sign, wide and/or safety line form according to the described optical anti-counterfeiting element of arbitrary claim among the claim 1-11.

13. have the product of the described optical anti-counterfeiting element of arbitrary claim among the claim 1-12.

14. product according to claim 13 comprises body and described Security element, wherein said Security element is arranged in described body surface or is partially submerged into described body at least.

15. product according to claim 14, wherein said Security element is partially submerged in the described body and forms opened window safety line.

16. according to the described product of arbitrary claim among the claim 13-15, wherein said product is banknote, credit card, passport, marketable securities or cheque paper.

17. according to the described product of arbitrary claim among the claim 13-16, wherein said product is to be the banknote or the cheque paper of opened window safety line with described Security element.

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