阅读说明：本技术 一种光学变色烫金材料 (Optical color-changing gold stamping material ) 是由 不公告发明人 于 2021-01-17 设计创作，主要内容包括：本发明涉及一种光学变色烫金材料,包含基材膜层、分离层、保护层、纳米微结构层、专色金属油墨印刷层、吸收层、介质层、镜面反射层和热熔胶涂层,其中吸收层、介质层和反射层构成形成法布里-珀罗干涉器结构的多镀层干涉型反射镀层,纳米微结构层为全息光栅模压微结构,该微结构是全局或局部区域的一种或多种不同间距光栅结构的组合,专色金属油墨印刷层的颜色配色接近于干涉型反射镀层第一颜色,垂直正面看时专色印刷信息隐藏于干涉型反射镀层背景色中,并不明显,倾斜角度看时,干涉型反射镀层颜色变化而印刷的专色金属油墨不发生变化,显出专色印刷信息。本烫印材料存在适应性广泛,在商品或有价物品上的印刷工艺简单,防伪性能较高的特点。(The invention relates to an optical color-changing gold stamping material, which comprises a substrate film layer, a separation layer, a protective layer, a nano microstructure layer, a special color metal ink printing layer, an absorption layer, a dielectric layer, a mirror reflection layer and a hot melt adhesive coating, wherein the absorption layer, the dielectric layer and the reflection layer form a multi-coating interference type reflection coating forming a Fabry-Perot interferometer structure, the nano-micro-structure layer is a holographic grating mould pressing micro-structure, the microstructure is a combination of one or more grating structures with different intervals in the whole or local area, the color matching of the spot color metal ink printing layer is close to the first color of the interference type reflection coating, the spot color printing information is hidden in the background color of the interference type reflection coating when the spot color metal ink printing layer is seen from the front side, and when the metal printing ink is seen at an inclined angle, the color of the interference type reflection coating is changed, so that the printed spot color metal printing ink is not changed, and spot color printing information is displayed. The hot stamping material has the characteristics of wide adaptability, simple printing process on commodities or valuable articles and higher anti-counterfeiting performance.)

1. An optical color-changing gold stamping material is characterized by comprising a substrate film layer, a separation layer, a protective layer, a nano-micro structural layer, a special color metal ink printing layer, an absorption layer, a dielectric layer, a mirror reflection layer and a hot melt adhesive coating, wherein the absorption layer, the dielectric layer and the reflection layer form a multi-coating interference type reflection coating forming a Fabry-Perot interferometer structure, the nano-micro-structure layer is a holographic grating mould pressing micro-structure, the microstructure is a combination of one or more grating structures with different intervals in the whole or local area, the color matching of the spot color metal ink printing layer is close to the first color of the interference type reflection coating, the spot color printing information is hidden in the background color of the interference type reflection coating when the spot color metal ink printing layer is seen from the front side, and when the metal printing ink is seen at an inclined angle, the color of the interference type reflection coating is changed, so that the printed spot color metal printing ink is not changed, and spot color printing information is displayed.

2. The optically variable gold stamping material of claim 1, wherein the multilayer interference light variable plating layer comprises: a reflective layer, a dielectric layer and an absorbing layer; the material of the reflecting layer comprises: one metal of aluminum, silver, copper, tin, chromium, nickel and titanium, or an alloy formed by combining at least any two metals of aluminum, silver, copper, tin, chromium, nickel and titanium; the material of the dielectric layer comprises: magnesium fluoride, silicon dioxide, zinc sulfide, titanium nitride, titanium dioxide, titanium monoxide, titanium sesquioxide, titanium oxide triacetate, tantalum pentoxide, niobium pentoxide, cerium dioxide, bismuth trioxide, chromium trioxide, iron oxide, hafnium dioxide, or zinc oxide; the material of the absorption layer comprises: one metal of nickel, chromium, aluminum, silver, copper, tin and titanium, or an alloy formed by combining at least any two metals of nickel, chromium, aluminum, silver, copper, tin and titanium.

3. The optical color-changing gold stamping material according to claim 1, wherein the nano-micro structure layer comprises a combination of one or more grating structures with different pitches in a global or local area, and the cross-sectional structure in the extending direction is as follows: one of a sinusoidal structure, a rectangular grating structure, a semicircular structure and a blazed grating structure, or a structure formed by combining at least any two of the sinusoidal structure, the rectangular grating structure, the semicircular structure and the blazed grating structure.

4. The optically variable gold stamping material of claim 1, wherein the nano-micro structure layer is on the multi-coated optically variable reflective layer, and the information content of the holographic grating can be identified by naked eyes by the existence of different degrees of bright and dark reflection to light from various angles when viewed through the substrate layer.

5. The optical color-changing gold stamping material according to claim 1, wherein the ink color matching of the spot color metal ink printing layer is close to the first color of the interference type reflection coating, the spot color printing information is hidden in the background color of the interference type reflection coating when viewed from the front and is not obvious, and the spot color printing information is shown when the color of the interference type reflection coating changes and the printed spot color metal ink does not change when viewed from an inclined angle; or the ink color matching of the spot color metal ink printing layer is close to the second color of the interference type reflection coating, the difference between the spot color printing information and the background color of the interference type reflection coating is larger and displayed when the spot color metal ink printing layer is seen perpendicularly to the front surface, the ink color matching of the spot color metal ink printing layer is close to the second color of the interference type reflection coating when the spot color metal ink printing layer is seen at an inclined angle, the ink color matching is hidden in the background color of the interference type reflection coating, and the ink color matching reflection degree of the spot color metal ink printing layer is also close to the reflection degree of the interference type.

6. The optical color-changing gold stamping material as claimed in claim 1, wherein: the base film layer is made of one of PET, PVC and PC materials; a release layer is arranged below the base film layer.

7. The optical color-changing gold stamping material as claimed in claim 1, wherein: the protective layer is organic resin or mineral substance of transparent medium, and can be removed.

8. The optical color-changing gold stamping material as claimed in claim 1, wherein: the interference type color-changing coating mainly provides an easily-identified anti-counterfeiting function, the spot color metal ink printing layer and the interference type color-changing coating form a more complex optical structure to provide the anti-counterfeiting function, the nano micro-structural layer mainly plays a role in marking manufacturer trademarks and other related information and a certain anti-counterfeiting function due to different light and shade of light reflection of the nano micro-structural layer and the interference type color-changing coating at various angles, the nano micro-structural layer plays an auxiliary role in the invention, the nano micro-structural layer can be removed in a popularization period according to the cost requirement, only the interference type color-changing coating providing the main protection function is reserved, and the structural materials of a substrate film layer, a separation layer, a spot color metal ink printing layer, an absorption layer, a dielectric layer, a.

9. The special anti-counterfeiting structure comprises the spot color metal ink printing layer and the interference type color changing coating layer, the interference type color changing coating layer can be hot-stamped on the surfaces of packages and valuable articles, and the effect of printing the spot color metal ink layer on the surface of the interference type color changing coating layer is equal to the effect of hot-stamping a structural material comprising a base material film layer, a separation layer, the spot color metal ink printing layer, an absorption layer, a medium layer, a mirror reflection layer and a hot melt adhesive coating layer.

Technical Field

The invention relates to an optical color-changing gold stamping material, and relates to the technical field of holographic anti-counterfeiting and optical anti-counterfeiting.

Background

Once the optical color-changing material is available, it is widely favored. In order to prevent counterfeiting by means of scanning, copying and the like, optical anti-counterfeiting technology is widely adopted in various high-security or high-value-added printed matters such as bank notes, credit cards, passports, securities, product packages and the like, and a very good effect is achieved.

Among various optical anti-counterfeiting technologies, multilayer interference light variation technology is receiving more and more attention because of strong optical color variation effect under different viewing angles. However, the multilayer interference optical color-changing material exists in the form of optically variable pigment and optically variable film for a long time, and has the characteristics of high printing difficulty in various high-safety or high-added-value printed matters such as valuable articles and product packages, high printing cost and difficult process due to the fact that special devices are required to be arranged on printing equipment, and great limitation on application difficulty and popularization difficulty in high-value anti-counterfeiting package printed matters.

Disclosure of Invention

The invention provides an optical color-changing gold stamping material aiming at the problems provided by the background technology, which comprises a substrate film layer, a separation layer, a protective layer, a nano-micro structural layer, a spot color metal ink printing layer, an absorption layer, a dielectric layer, a mirror reflection layer and a hot melt adhesive coating which are overlapped from top to bottom, wherein the absorption layer, the dielectric layer and the reflection layer form a multi-coating interference type reflection coating forming a Fabry-Perot interferometer structure, the nano-micro structural layer is a holographic grating mould pressing microstructure which is a combination of one or more grating structures with different intervals in a whole or local area, the color matching of the spot color metal ink printing layer is close to the first color of the interference type reflection coating, when the spot color printing information is seen from the vertical front side, the spot color printing information is hidden in the background color of the interference type reflection coating and is not obvious, when the angle is seen, the color of the interference type reflection coating changes, displaying spot color printing information; the other structural layers are made of the conventional gold stamping material. The optical color-changing gold stamping material disclosed by the technical scheme has the characteristics of high anti-counterfeiting performance, unique anti-counterfeiting effect, wide application range of printing stocks and simple printing process on commodities or valuable articles.

In order to achieve the purpose, the invention adopts the following technical scheme:

an optical color-changing gold stamping material comprises a base material film layer, a separation layer, a protective layer, a nano-micro structural layer, a special color metal ink printing layer, an absorption layer, a dielectric layer, a mirror reflection layer and a hot melt adhesive coating which are stacked from top to bottom.

Optionally, the base film layer is made of one of PET, PVC and PC, and preferably made of PET.

Optionally, the separation layer is formed by coating one of paraffin oil or silicone oil material, preferably low-temperature paraffin oil material.

Optionally, the protective layer is resin or mineral of transparent medium, and the protective layer can be removed.

As mentioned above, the nano-micro structure layer of the optical color-changing gold stamping material comprises a combination of one or more grating structures with different pitches in a global or local area, and the cross-sectional structure in the extension direction is as follows: one of a sinusoidal structure, a rectangular grating structure, a semicircular structure and a blazed grating structure, or a structure formed by combining at least any two of the sinusoidal structure, the rectangular grating structure, the semicircular structure and the blazed grating structure. For a given holographic grating variation effect, this is achieved in this layer profile combination. Preferably, a nano-micro structure layer with partial area having grating structure variation effect and partial area having no grating structure is adopted. In the area without the grating structure, a spot color metal ink printing layer is printed, so that the optical influence of the grating area is reduced. The nano-micro structure layer is arranged on the multi-coating layer optically variable reflecting layer when seen through the substrate layer, and bright and dark reflection with different degrees to light exists from various angles, so that the information content of the holographic grating can be distinguished by naked eyes.

Optionally, the ink color matching of the spot color metal ink printing layer is close to the first color of the interference type reflection coating, when the printing layer is viewed perpendicularly to the front surface, the spot color printing information is hidden in the background color of the interference type reflection coating and is not obvious, and when the printing layer is viewed at an inclined angle, the color of the interference type reflection coating changes, but the printed spot color metal ink does not change, so that the spot color printing information is displayed; or the ink color matching of the spot color metal ink printing layer is close to the second color of the interference type reflection coating, the difference between the spot color printing information and the background color of the interference type reflection coating is larger and displayed when the spot color metal ink printing layer is seen perpendicularly to the front surface, the ink color matching of the spot color metal ink printing layer is close to the second color of the interference type reflection coating when the spot color metal ink printing layer is seen at an inclined angle, the ink color matching is hidden in the background color of the interference type reflection coating, and the ink color matching reflection degree of the spot color metal ink printing layer is also close to the reflection degree of the interference type.

Optionally, the metallic ink of the spot color metallic ink printing layer can also be replaced by an optical characteristic ink with a stronger light reflection effect, such as a pearlescent pigment, a liquid crystal pigment, a magnetic optically variable pigment, and the like.

The absorption layer, the dielectric layer and the mirror reflection layer form a Fabry-Perot interferometer structure. In the fabry-perot interferometer configuration, the absorbing layer acts as a beam splitter, reflecting half of the light (called beam 1) and transmitting half. The transmitted light is reflected by the reflecting layer after passing through the dielectric layer and then is emitted out through the absorbing layer (called as a light beam 2), and the light beam 1 and the light beam 2 interact to generate interference, so that the selection of specific wavelength is enhanced, and therefore, the color can be observed. When the incident direction of the light is changed, the optical path of the light beam in the medium layer is changed, if the medium material is a high-refractive-index material, the color is unchanged or is not obviously changed, and if the medium material is a low-refractive-index material, the color is obviously changed, so that the light-changing effect is achieved.

The material of the absorption layer comprises: one metal of nickel, chromium, aluminum, silver, copper, tin and titanium, or an alloy formed by combining at least any two metals of nickel, chromium, aluminum, silver, copper, tin and titanium. Chromium is preferred for cost effectiveness; the material of the dielectric layer comprises: magnesium fluoride, silicon dioxide, zinc sulfide, titanium nitride, titanium dioxide, titanium monoxide, titanium sesquioxide, titanium pentoxide, tantalum pentoxide, niobium pentoxide, cerium dioxide, bismuth trioxide, chromium trioxide, iron oxide, hafnium dioxide or zinc oxide, wherein the cost is mainly controlled by magnesium fluoride and silicon dioxide; the material of the reflecting layer comprises: aluminum, silver, copper, tin, chromium, nickel, titanium, or an alloy of at least two metals selected from aluminum, silver, copper, tin, chromium, nickel, and titanium, with aluminum being preferred in view of cost effectiveness. Each layer of the interference-type reflective coating of the fabry-perot interferometer structure is formed by one or more of: an evaporation deposition method, an electron beam evaporation deposition method, or a magnetron sputtering deposition method.

The optical color-changing gold stamping material is characterized in that: the interference type color-changing coating mainly provides an easily-identified anti-counterfeiting function, the spot color metal ink printing layer and the interference type color-changing coating form a more complex optical structure to provide the anti-counterfeiting function, the nano micro-structural layer mainly plays a role in marking manufacturer trademarks and other related information and a certain anti-counterfeiting function due to different light and shade of light reflection of the nano micro-structural layer and the interference type color-changing coating at various angles, the nano micro-structural layer plays an auxiliary role in the invention, the nano micro-structural layer can be removed in a popularization period according to the cost requirement, only the interference type color-changing coating providing the main protection function is reserved, and the structural materials of a substrate film layer, a separation layer, a spot color metal ink printing layer, an absorption layer, a dielectric layer, a.

Optionally, the spot color metallic ink printing layer and the interference type color-changing coating layer form a main anti-counterfeiting functional structure, the interference type color-changing coating layer can be firstly hot-stamped on the surfaces of the packages and valuable articles, and the effect of printing the spot color metallic ink printing layer on the surface of the interference type color-changing coating layer is equal to the effect of hot-stamping a structural material comprising a base material film layer, a separation layer, a spot color metallic ink printing layer, an absorption layer, a dielectric layer, a mirror reflection layer and a hot melt adhesive coating layer.

Optionally, the equivalent effect of the main anti-counterfeiting functional structure composed of the another spot color metal ink printing layer and the interference type color-changing plating layer is as follows: firstly, the interference type color-changing coating is hot-stamped on the surfaces of packages and valuable articles, and then a spot-color hot-stamping material with similar color is hot-stamped on the surface of the interference type color-changing coating.

The invention has the outstanding effects of high material technical level, large imitation difficulty, wide adaptability of printing materials, simple printing process on product packages and valuable articles, unique anti-counterfeiting effect, convenient identification for the public and convenient popularization and occupation of high-end anti-counterfeiting package markets.

Drawings

Fig. 1 is a schematic view of a layered structure in an optical color-changing gold stamping material according to a first embodiment of the present invention.

Fig. 2 is a schematic view of observation effects at various angles in an optical color-changing gold stamping material according to a first embodiment of the present invention. FIG. 2a is a schematic view showing the color development effect of each color development layer when the color development layer is vertical to the surface of the substrate; FIG. 2b is a schematic diagram showing the color development effect of each color development layer when the surface of the substrate is tilted.

Fig. 3 is a schematic view of a layered structure in a second embodiment of the optical color-changing gold stamping material of the present invention.

Fig. 4 is a schematic view of observation effects at various angles in an embodiment of the optically variable gold stamping material of the invention. FIG. 4a is a schematic view showing the color development effect of each color development layer when the color development layer is vertical to the surface of the substrate; FIG. 4b is a schematic view showing the color development effect of each color development layer when the surface of the substrate is tilted.

Description of the drawings: 1-substrate layer 2-release layer 3-protective layer 4-nano microstructure layer 5-spot color metal ink layer 6-absorption layer 7-dielectric layer 8-reflection layer 9-hot melt adhesive coating 10-multi-coating interference type color-changing coating

Detailed Description

Embodiments of the invention will be further described with reference to the accompanying drawings, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below are exemplary embodiments with reference to the drawings, are intended to explain the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Example one

Referring to fig. 1, the optical color-changing gold stamping material of the present invention comprises a 1 base film layer, a 2 release layer, a 3 protective layer, a 4 nano-micro structure layer, a 5 spot color metal ink layer, a 6 absorption layer, a 7 dielectric layer, an 8 reflection layer, and a 9 hot melt adhesive coating layer, which are stacked from top to bottom; wherein the 6 absorption layers, the 7 dielectric layers and the 8 reflection layers form a 10-multi-plating interference type color-changing plating layer; the color development layer of the embodiment is a diffraction optical color development layer of the nanometer microstructure layer, a spot color metal ink layer and a multi-coating interference type color-changing coating.

The nano microstructure is a simple positive-wave grating structure, can be made into a master plate by laser etching, electron beam etching, ion etching and other modes, and then is copied onto a base layer by processes of electroforming, mould pressing, UV copying and the like. A more common process is to coat an imaging layer on the surface of the substrate and replicate the micro-relief structure on the imaging layer in order to improve the replication quality and replication efficiency of the micro-relief structure. The spot color metal ink printing layer is finished by a printing mode, and a special golden yellow metal ink intaglio printing mode is adopted in the figure 2. The interference type color-changing plating layer of the multi-plating layer is an interference type multi-layer film structure sequentially containing Cr (thickness: 5 nm)/SiO 2 (thickness: 370 nm)/Al (thickness: 40nm), and the interference type multi-layer film of the parameters has the characteristics of golden yellow in front view and green in oblique view.

When the substrate is observed from the other side of the substrate to the front side, as shown in fig. 2a, the diffraction optics of the nano-micro structure layer is higher than the reflection of the interference type color-changing coating with the background color, namely, the large KS letter part in fig. 2 is colored; the background color interference type color-changing coating is golden yellow, namely, the background color part in the figure 2, and the spot color metal ink printing layer is also golden yellow and is hidden in the background color, namely, the small KS letter part in the figure 2; when the substrate is obliquely observed from the other side, as shown in fig. 2b, the nano-micro structure layer is colored, the special color metal ink printing layer is golden yellow, and the interference type color-changing plating layer is green.

Example two

Referring to fig. 3, the optical color-changing gold stamping material of the present invention includes a base film layer 1, a release layer 2, a special color metallic ink layer 5, an absorption layer 6, a dielectric layer 7, a reflection layer 8, and a hot melt adhesive coating 9, which are stacked from top to bottom; wherein the 6 absorption layers, the 7 dielectric layers and the 8 reflection layers form a 10-multi-plating interference type color-changing plating layer; the color development layer of the embodiment is composed of a spot color metal ink layer and a multi-coating interference type color-changing coating.

The specific process of the second embodiment is simpler than that of the first embodiment, which can be seen in the first embodiment.

The spot color metal ink printing layer of the embodiment is completed by a printing mode, and the special gold green metal ink intaglio printing is adopted in fig. 2. The interference type color-changing plating layer of the multi-plating layer is an interference type multi-layer film structure sequentially containing Cr (thickness: 5 nm)/SiO 2 (thickness: 370 nm)/Al (thickness: 40nm), and the interference type multi-layer film of the parameters has the characteristics of golden yellow in front view and green in oblique view.

When the film is observed from the other side of the substrate to the front side, as shown in fig. 4a, the background color interference type color-changing plating layer is golden yellow, and the spot color metal ink printing layer is golden green; when the metal printing ink is obliquely observed from the other side of the substrate, as shown in fig. 4b, the spot-color metal printing ink printing layer is golden green, the interference-type color-changing plating layer is green, the colors of the two layers are similar, and the information of the spot-color metal printing ink is hidden in the background color.

The invention has the outstanding characteristics that the diffraction type optical characteristic, the interference type optical characteristic and the reflection type optical characteristic are integrated, and the process of transmitting the hollow diffraction optical characteristic is added on the basis of the invention, so that the optical film integrating the diffraction type optical characteristic, the interference type optical characteristic, the reflection type optical characteristic and the hollow window characteristic can be produced. Since the multi-plating-layer structure hollow-out process is applied in chinese patent CN 111845148A, the present invention removes the part of the hollow-out optical features, but the present invention also belongs to the protection scope of the present invention for the hollow-out optical features added on the basis of the present invention by using the traditional hollow-out process (i.e. the process of printing the release layer on the reflective layer and then performing the extrusion cleaning).

The core of the invention is to provide a method for combining reflection type and interference type optical characteristics, which has simple process and low cost. Compared with the method combining the reflection type optical characteristics and the interference type optical characteristics of Chinese patent publication No. CN111716936A and Chinese patent No. CN111890817A, the method has the absolute advantages of simple process and low cost. The trans-structure, namely the spot color metal ink layer is used as a background layer, the interference type color change coating is used as an information expression layer, and the trans-structure is easy to realize and low in cost on the printing process of product packaging and valuable articles.