CN114639300B - Optically variable anti-counterfeiting film, preparation method thereof and anti-counterfeiting product - Google Patents
Optically variable anti-counterfeiting film, preparation method thereof and anti-counterfeiting product Download PDFInfo
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- CN114639300B CN114639300B CN202210200746.1A CN202210200746A CN114639300B CN 114639300 B CN114639300 B CN 114639300B CN 202210200746 A CN202210200746 A CN 202210200746A CN 114639300 B CN114639300 B CN 114639300B
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 68
- 229920005989 resin Polymers 0.000 claims abstract description 68
- 239000010410 layer Substances 0.000 claims description 253
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 16
- 238000001704 evaporation Methods 0.000 claims description 11
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 8
- 229920000178 Acrylic resin Polymers 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004831 Hot glue Substances 0.000 claims description 4
- 238000007731 hot pressing Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 24
- 239000010408 film Substances 0.000 description 46
- 239000010409 thin film Substances 0.000 description 8
- 238000005269 aluminizing Methods 0.000 description 7
- 239000003086 colorant Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007774 anilox coating Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101001018064 Homo sapiens Lysosomal-trafficking regulator Proteins 0.000 description 1
- 102100033472 Lysosomal-trafficking regulator Human genes 0.000 description 1
- 235000010703 Modiola caroliniana Nutrition 0.000 description 1
- 244000038561 Modiola caroliniana Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0257—Multilayer
Abstract
The invention provides a optically variable anti-counterfeiting film, a preparation method thereof and an anti-counterfeiting product, wherein the optically variable anti-counterfeiting film comprises optically variable layers, the optically variable layers comprise semitransparent reflecting layers and at least two optically variable unit layers which are sequentially overlapped from top to bottom, each optically variable unit layer comprises a resin layer and a reflecting layer which are arranged up and down, each reflecting layer above the optically variable unit layer at the lowest layer consists of reflecting areas which are arranged at intervals, hollowed-out areas are arranged between the reflecting areas, at least part of the reflecting areas of each reflecting layer can penetrate through all the resin layers above the reflecting areas and are projected on the semitransparent reflecting layers, and at least one reflecting layer is provided with invisible anti-counterfeiting graphics. The invention can realize the optically variable effect containing invisible anti-counterfeiting graphics in different areas, increase the imitation difficulty and improve the anti-counterfeiting performance.
Description
Technical Field
The invention belongs to the technical field of anti-counterfeiting films, and particularly relates to an optically variable anti-counterfeiting film, a preparation method thereof and an anti-counterfeiting product.
Background
The optically variable anti-counterfeiting film is formed by converting different colors of light formed by thin film interference of light, is an anti-counterfeiting technology with high technical content and high imitation threshold, and is widely applied to the fields of banknote securities and the like.
The traditional optically variable anti-counterfeiting film generally comprises three layers, a semi-transparent metal layer, a transparent medium layer and a reflecting layer, different colors are realized according to the thickness regulation and control of the transparent medium layer, the optically variable anti-counterfeiting film visually shows that one color is converted into another color, the effect is relatively single, and the decorative effect and the anti-counterfeiting effect which are higher in requirements cannot be met.
Disclosure of Invention
The invention aims to provide an optically variable anti-counterfeiting film, a preparation method thereof and an anti-counterfeiting product, which can realize optically variable effects containing invisible anti-counterfeiting graphics in different areas, increase imitation difficulty and improve anti-counterfeiting performance.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a optically variable anti-counterfeiting film, which comprises optically variable layers, wherein each optically variable layer comprises a semitransparent reflecting layer and at least two optically variable unit layers which are sequentially overlapped from top to bottom, each optically variable unit layer comprises a resin layer and a reflecting layer which are arranged up and down, each reflecting layer above the optically variable unit layer of the lowest layer consists of reflecting areas which are arranged at intervals, hollow areas are arranged between the reflecting areas, at least part of the reflecting areas of each reflecting layer can penetrate through all the resin layers above the reflecting areas and are projected on the semitransparent reflecting layer, and at least one reflecting layer is provided with invisible anti-counterfeiting graphics.
In the implementation process, at least part of the reflecting area of each reflecting layer can penetrate through all the resin layers above the reflecting area and project on the semitransparent reflecting layer, so that each reflecting layer can form a thin film interference structure with all the resin layers above the reflecting layer and the semitransparent reflecting layer; because the total thickness of the resin layers of the thin film interference structures above different reflection areas is different, when the transparent reflection layer is observed from the outer side, different positions on the whole film surface can show different color change optically variable effects. The invisible anti-counterfeiting image-text on the reflecting layer is formed by a hollowed-out lattice (namely, no reflecting substance is contained), a plurality of small points are hollowed out on the reflecting layer, and the small points are distributed according to a certain rule, so that the anti-counterfeiting information of the invisible image-text can be formed.
In an alternative embodiment, the OD (Optical Density) value of the semi-transparent reflective layer is 0.1 to 0.9.OD value 0 indicates that the layer is fully transparent; an OD of 1 indicates that the layer is completely opaque. The OD value of the semitransparent reflecting layer is controlled by adjusting the thickness of the semitransparent reflecting layer, and the larger the thickness is, the larger the OD value is, and the more opaque the reflecting layer is.
In the implementation process, the semitransparent reflecting layer not only can reflect, but also has certain transmittance, so that the displayed optically variable effect can be observed.
In an alternative embodiment, the refractive index of the resin layer is 1.3-1.7; the thickness of the resin layer is 100-800nm.
In an alternative embodiment, the reflecting layer is a metal reflecting layer, the material includes one or more of aluminum, silver, gold, copper, zinc, chromium, iron, nickel and chrome-nickel blend, and the thickness of the reflecting layer is 10-50nm.
In an alternative embodiment, the lower surface of at least one of the resin layers is provided with holographic grooves.
In an alternative embodiment, a backing adhesive layer is further arranged below the optically variable layer.
In an alternative embodiment, the device further comprises a base film, a release layer and an information recording layer which are sequentially overlapped from top to bottom, wherein the information recording layer is positioned above the semitransparent reflective layer.
In an alternative embodiment, the base film is made of a thermoplastic resin, such as one of PVC, PET, PS, PP, PC films, and the base film has a thickness of 12-75 μm.
In an alternative embodiment, the material of the information recording layer is thermoplastic resin, such as acrylic resin, polyurethane resin, etc., and the thickness of the information recording layer is 0.5-2 μm.
In a second aspect, the invention provides a method for preparing an optically variable anti-counterfeiting film, comprising the following steps:
s1, sequentially coating a release layer and an information recording layer on a base film;
s2, evaporating a layer of semitransparent metal aluminum on the information recording layer to form a semitransparent reflecting layer;
s3, coating acrylic resin on the semitransparent reflecting layer to form a resin layer;
s4, coating water-washing ink on the resin layer, evaporating a layer of metal, and forming a reflecting layer; washing off metal to form reflective areas with hollow invisible graphics and texts which are distributed at intervals;
s5, repeating the steps S3 and S4 on the reflecting layer for a plurality of times to form a plurality of optically variable unit layers;
s6, coating a hot melt adhesive on the reflecting layer to form a back adhesive layer, and thus obtaining the holographic optically variable anti-counterfeiting film;
wherein, the last step S4 may not include applying water-washing ink, washing off metal, and forming reflective regions in spaced apart relation.
In an alternative embodiment, said step S3 further comprises hot-pressing the holographic grooves on the resin layer at least once.
In a third aspect, the present invention also provides a security product comprising a substrate and the multi-colour optically variable security film provided in the first aspect, the multi-colour optically variable security film being adhered to the substrate by a backing layer.
Compared with the prior art, the invention has the beneficial effects that:
the invention can realize the optically variable effect containing invisible anti-counterfeiting graphics in different areas, has more abundant and various optically variable modes, increases the imitation difficulty and improves the anti-counterfeiting performance.
Drawings
FIG. 1 is a schematic structural diagram of an optically variable security film according to example 1;
FIG. 2 is a schematic view showing the structure of the membrane surface in example 1;
FIG. 3 is a schematic diagram of invisible anti-counterfeit text;
FIG. 4 is a schematic view of a invisible security pattern;
FIG. 5 is a schematic structural diagram of a holographic optically variable security film according to example 2;
fig. 6 is a schematic structural view showing the membrane surface of example 2.
Reference numerals: 100-optically variable anti-counterfeiting film; 110-base film; 120-releasing layer; 130-an information recording layer; 140-optically variable layer; 141-a semitransparent reflective layer; 142-a first resin layer; 143-a first reflective layer; 144-a second resin layer; 145-a second reflective layer; 150-a back adhesive layer; 200-holographic optically variable anti-counterfeiting film; 210-base film; 220-release layer; 230-an information recording layer; 240-holographic optically variable layer; 241-a semi-transparent reflective layer; 242-a first resin layer; 243-a first reflective layer; 244-a second resin layer; 245-a second reflective layer; 246-a third resin layer; 247-a third reflective layer; 250-backsize layer.
Detailed Description
The following description of the technical solution of the present invention is made clearly and completely by referring to the accompanying drawings, and the examples are given only for explaining the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
It should also be noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
As shown in fig. 1 to 4, the optically variable anti-counterfeiting film 100 provided in this embodiment includes a base film 110, a release layer 120, an information recording layer 130, an optically variable layer 140, and a back adhesive layer 150, which are sequentially stacked from top to bottom. The optically variable layer 140 includes a semitransparent reflective layer 141 and two optically variable unit layers which are sequentially stacked from top to bottom, and each optically variable unit layer includes a resin layer and a reflective layer which are disposed from top to bottom. The first optically variable unit layer comprises a first resin layer 142 and a first reflecting layer 143, the first reflecting layer 143 is divided into a plurality of first reflecting areas which are arranged at intervals, invisible anti-counterfeiting characters "Hua" as shown in fig. 3 are arranged on the first reflecting areas, and first hollowed-out areas are arranged between the first reflecting areas. The second optically variable unit layer comprises a second resin layer 144 and a second reflecting layer 145, the second resin layer 144 fills the hollow areas of the first reflecting layer 143, the second reflecting layer 145 is divided into a plurality of second reflecting areas which are arranged at intervals, the second reflecting areas are positioned below the first hollow areas, the invisible anti-counterfeiting pattern as shown in fig. 4 is arranged on the second reflecting areas, and the second hollow areas are arranged between the second reflecting areas.
The first reflective region of the first reflective layer 143 can penetrate the first resin layer 142 and project onto the semitransparent reflective layer 141, and the first reflective layer 143, the first resin layer 142 and the semitransparent reflective layer 141 combine to form a first thin film interference structure to produce a light variation effect. The second reflective area of the second reflective layer 145 can penetrate through the second resin layer 144 and the first resin layer 142 of the first hollowed-out area and project on the semitransparent reflective layer 141, and the second reflective layer 145, the second resin layer 144, the first resin layer 142 and the semitransparent reflective layer 141 are combined to form a second thin film interference structure to generate a light variation effect. When the optically variable angle is changed at the outermost side of the film, optically variable effects of changing A colors into B colors can be observed in the first reflection area of the first reflection layer 143, meanwhile, invisible anti-counterfeiting characters "hua" as shown in fig. 3 can be observed, optically variable effects of changing C colors into D colors can be observed in the second reflection area of the second reflection layer 145, meanwhile, invisible anti-counterfeiting patterns as shown in fig. 4 can be observed, and optically variable effects containing invisible anti-counterfeiting graphics in different areas in different forms can be realized.
When the film surface is observed, the first reflection area is displayed as green, the second reflection area is displayed as red, when the light change angle is changed, the first reflection area is changed from green to purple, the second reflection area is displayed from red to blue, and different areas are enabled to present different forms of light change effects.
The preparation method of the optically variable anti-counterfeiting film 100 provided in this embodiment includes the following steps:
s1, taking a PET film with the thickness of 19 mu m as a base film 110, and sequentially coating and forming a release layer 120 and an information recording layer 130 with the thickness of 1.0 mu m on the base film 110;
s2, evaporating a semitransparent metal aluminum layer on the information recording layer 130 by using a vacuum aluminizing machine, wherein the OD value is 0.6, and forming a semitransparent reflecting layer 141;
s3, coating acrylic resin on the semitransparent reflective layer 141 to form a first resin layer 142 with the thickness of 200 nm;
s4, coating water washing ink, evaporating a metal aluminum layer with the thickness of 10nm on the first resin layer 142 by using a vacuum aluminizing machine, and washing aluminum according to requirements to obtain metal aluminum areas with hollowed-out invisible characters which are distributed at intervals, so as to form a first reflecting layer 143;
s5, coating acrylic resin on the first reflecting layer 143 to form a second resin layer 144 with the thickness of 300 nm;
s6, coating water washing ink, evaporating a metal aluminum layer with the thickness of 20nm on the second resin layer 144 by using a vacuum aluminizing machine, and washing aluminum according to requirements to obtain metal aluminum areas with hollowed-out invisible patterns which are distributed at intervals, so as to form a second reflecting layer 145;
s7, coating hot melt adhesive on the second reflecting layer 145 by using an anilox roller to form a back adhesive layer 150, and thus obtaining the optically variable anti-counterfeiting film 100.
Example 2
As shown in fig. 5 and 6, the holographic optically variable anti-counterfeiting film 200 provided in this embodiment includes a base film 210, a release layer 220, an information recording layer 230, a holographic optically variable layer 240, and a back adhesive layer 250, which are sequentially stacked from top to bottom. The holographic optically variable layer 240 comprises a semitransparent reflecting layer 241 and three optically variable unit layers which are sequentially overlapped from top to bottom, and each optically variable unit layer comprises a resin layer and a reflecting layer which are arranged from top to bottom. The first optically variable unit layer comprises a first resin layer 242 and a first reflecting layer 243, holographic grooves are formed in the lower surface of the first resin layer 242, the first reflecting layer 243 is divided into a plurality of first reflecting areas which are arranged at intervals, invisible anti-counterfeiting characters "Hua" as shown in fig. 3 are arranged on the first reflecting areas, and first hollowed-out areas are formed between the first reflecting areas. The second optically variable unit layer comprises a second resin layer 244 and a second reflecting layer 245, the second resin layer 244 fills the first hollow area, holographic grooves are formed in the lower surface of the second resin layer 244, the second reflecting layer 245 is divided into a plurality of second reflecting areas which are arranged at intervals, the second reflecting areas are located below the first hollow area, invisible anti-counterfeiting patterns as shown in fig. 4 are arranged on the second reflecting areas, the second hollow areas are arranged between the second reflecting areas, and the first hollow areas and the second hollow areas are partially overlapped. The third optically variable cell layer includes a third resin layer 246 and a third reflective layer 247, the third resin layer 246 fills the second hollow area, and the third reflective layer 247 has a complete layer structure.
The first reflective region of the first reflective layer 243 can penetrate the first resin layer 242 and project onto the semi-transparent reflective layer 241, and the first reflective layer 243, the first resin layer 242 and the semi-transparent reflective layer 241 combine to form a first thin film interference structure, which cooperates to generate a holographic optically variable effect. The second reflection area of the second reflection layer 245 can penetrate through the second resin layer 244 and the first resin layer 242 of the first hollowed-out area and be projected on the semitransparent reflection layer 241, and the second reflection layer 245, the second resin layer 244, the first resin layer 242 and the semitransparent reflection layer 241 are combined to form a second thin film interference structure, so that holographic optically variable effect is generated under the combined action. The third reflective layer 247 can be projected onto the semi-transparent reflective layer 241 through the third resin layer 246, the second resin layer 244 and the first resin layer 242 in the overlapping region of the first hollowed-out region and the second hollowed-out region, and the third reflective layer 247, the third resin layer 246, the second resin layer 244, the first resin layer 242 and the semi-transparent reflective layer 241 are combined to form a third thin film interference structure to generate a light-changing effect.
When the film surface is observed, the first reflection area is displayed as a blue holographic effect, the second reflection area is displayed as a green holographic effect, the rest areas are displayed as red, when the light change angle is changed, the first reflection area is changed from the blue holographic effect to the mauve holographic effect, the second reflection area is changed from the green holographic effect to the orange holographic effect, the rest areas are displayed from the red to the yellow, and the light change effects of different areas in different forms are realized. When the film surface is observed through backlight, invisible anti-counterfeiting characters "hua" as shown in fig. 3 can be seen in the first reflection area, and invisible anti-counterfeiting patterns as shown in fig. 4 can be seen in the second reflection area.
The preparation method of the holographic optically variable anti-counterfeiting film 200 provided by the embodiment comprises the following steps:
s1, taking a PET film with the thickness of 19 mu m as a base film 210, and sequentially coating and forming a release layer 220 and an information recording layer 230 with the thickness of 1.0 mu m on the base film 210;
s2, evaporating a semitransparent metal aluminum layer on the information recording layer 230 by using a vacuum aluminizing machine, wherein the OD value is 0.6, and forming a semitransparent reflecting layer 241;
s3, coating acrylic resin on the semitransparent reflective layer 241 to form a first resin layer 242 with the thickness of 200nm, and hot-pressing holographic grooves on the first resin layer 342 by using a molding machine through thermal transfer;
s4, coating water washing ink, evaporating a metal aluminum layer with the thickness of 10nm on the first resin layer 242 by using a vacuum aluminizing machine, and washing aluminum according to requirements to obtain metal aluminum areas with hollowed-out invisible graphics and texts which are distributed at intervals, so as to form a first reflecting layer 243;
s5, coating acrylic resin on the first reflecting layer 243 to form a second resin layer 244 with the thickness of 200nm, and hot-pressing the holographic grooves on the second resin layer 344 by using a die press through thermal transfer;
s6, coating water washing ink, evaporating a metal aluminum layer with the thickness of 20nm on the second resin layer 244 by using a vacuum aluminizing machine, and washing aluminum according to requirements to obtain metal aluminum areas with hollowed-out invisible graphics and texts which are distributed at intervals, so as to form a second reflecting layer 245;
s7, coating acrylic resin on the second reflecting layer 245 to form a third resin layer 246 with the thickness of 300 nm;
s8, evaporating a metal aluminum layer with the thickness of 20nm on the third resin layer 246 by using a vacuum aluminizing machine to form a third reflecting layer 247;
s9, coating hot melt adhesive on the third reflecting layer 247 by using an anilox roller to form a back adhesive layer 250, and thus obtaining the holographic optically variable anti-counterfeiting film 200.
Example 3
The anti-counterfeiting product provided by the embodiment comprises a base material and the optically variable anti-counterfeiting film 100 in the embodiment 1, wherein the optically variable anti-counterfeiting film 100 is adhered to the base material through the back adhesive layer 150, and the base film 110 is removed, so that the anti-counterfeiting product is obtained.
Example 4
The anti-counterfeiting product provided by the embodiment comprises a base material and the holographic optically variable anti-counterfeiting film 200 in the embodiment 2, wherein the holographic optically variable anti-counterfeiting film 200 is adhered to the base material through the back adhesive layer 250, and the base film 210 is removed, so that the anti-counterfeiting product is obtained.
The foregoing description of the preferred embodiments of the invention is not intended to limit the scope of the invention, but rather to cover any modifications, equivalents, improvements or the like within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a light becomes anti-fake membrane, includes light becomes the layer, its characterized in that, light becomes the layer including from top to bottom stack semitransparent reflection layer, at least two-layer light becomes the unit layer that sets gradually, every layer light becomes the unit layer including upper and lower resin layer and the reflection stratum that sets up, every layer of light becomes the unit layer top of the lower layer the reflection stratum is by the reflection area that the interval set up constitutes, be hollow area between the reflection area, the reflection area of the reflection stratum of light becomes the unit layer of the lower layer is located under the hollow area between the reflection area of the reflection stratum of light becomes the unit layer of its top, every layer at least partial reflection area of reflection stratum all can see through all resin layers of its top and projection on semitransparent reflection layer, at least one deck be provided with stealthy anti-fake picture and text on the reflection stratum.
2. The optically variable security film according to claim 1, wherein the OD value of the semi-transparent reflective layer is 0.1 to 0.9.
3. The optically variable security film according to claim 1, wherein the refractive index of the resin layer is 1.3 to 1.7; the thickness of the resin layer is 100-800nm.
4. The optically variable anti-counterfeiting film according to claim 1, wherein the reflecting layer is a metal reflecting layer, and the thickness of the reflecting layer is 10-50nm.
5. The optically variable security film according to claim 1, wherein a holographic groove is provided on a lower surface of at least one of the resin layers.
6. The optically variable security film according to any of claims 1 to 5, wherein a backing layer is further provided below the optically variable layer.
7. The optically variable anti-counterfeiting film according to claim 6, further comprising a base film, a release layer and an information recording layer which are sequentially stacked from top to bottom, wherein the information recording layer is located above the semitransparent reflective layer.
8. The method for preparing the optically variable anti-counterfeiting film according to claim 7, which comprises the following steps:
s1, sequentially coating a release layer and an information recording layer on a base film;
s2, evaporating a layer of semitransparent metal aluminum on the information recording layer to form a semitransparent reflecting layer;
s3, coating acrylic resin on the semitransparent reflecting layer to form a resin layer;
s4, coating water-washing ink on the resin layer, evaporating a layer of metal, and forming a reflecting layer; washing off metal to form reflective areas with hollow invisible graphics and texts which are distributed at intervals;
s5, repeating the steps S3 and S4 on the reflecting layer for a plurality of times to form a plurality of optically variable unit layers;
s6, coating hot melt adhesive on the reflecting layer to form a back adhesive layer, and thus obtaining the optically variable anti-counterfeiting film;
or, the last step S4 does not include applying water washing ink, washing off metal, and forming reflective areas with interval distribution.
9. The method of producing optically variable security film according to claim 8, wherein at least one of the steps S3 further comprises hot-pressing the holographic groove on the resin layer.
10. A security product comprising a substrate and the optically variable security film of claim 7 adhered to the substrate by the backsize layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210200746.1A CN114639300B (en) | 2022-03-02 | 2022-03-02 | Optically variable anti-counterfeiting film, preparation method thereof and anti-counterfeiting product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210200746.1A CN114639300B (en) | 2022-03-02 | 2022-03-02 | Optically variable anti-counterfeiting film, preparation method thereof and anti-counterfeiting product |
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| CN114639300A CN114639300A (en) | 2022-06-17 |
| CN114639300B true CN114639300B (en) | 2023-10-27 |
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| JP2007240787A (en) * | 2006-03-08 | 2007-09-20 | National Printing Bureau | Hologram sheet and printing medium |
| JP2009134094A (en) * | 2007-11-30 | 2009-06-18 | Toppan Printing Co Ltd | Diffraction structure transferring foil and forgery prevention medium using the same |
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