Optical 3D (three-dimensional) anti-counterfeiting film as well as manufacturing method and using method thereof

Abstract

The invention belongs to the technical field of anti-fake films, and discloses an optical 3D anti-fake film and a manufacturing method and a using method thereof.A base material serves as a bearing body, and a composite layer, an anti-fake film body and a release film layer are sequentially manufactured on the base material, so that a light-transmitting layer, a pattern layer and an adhesion layer can be conveniently manufactured, and the manufacturing efficiency is improved; the lens part of the light-transmitting layer can be effectively protected in the manufacturing process, and through the lens part and the light-transmitting part of the light-transmitting layer, image-text information of the pattern layer can be conveniently guided to the left eye and the right eye through different visual angles, so that people can see the 3D effect when observing the anti-counterfeiting film mark, the visual experience is remarkably improved, and the anti-counterfeiting film is suitable for popularization and application. The visual effect can better improve the difficulty of counterfeiting and reduce counterfeiting, meanwhile, once the optical 3D anti-counterfeiting film is transferred to be attached to the bearing body, the initial bearing base film is peeled off and the optical 3D anti-counterfeiting film is attached to the bearing body, the anti-counterfeiting film cannot be completely taken down from the bearing body, the counterfeiting difficulty is large, and the anti-counterfeiting strength is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-counterfeiting films, and in particular relates to an optical 3D anti-counterfeiting film and a manufacturing method and a use method thereof. Background Art

[0002] As an anti-counterfeiting mark, the existing anti-counterfeiting films for wine packaging include low-temperature baked marks, high-temperature baked marks, self-adhesive paper marks, thermal transfer marks, etc. However, no matter what form of wine anti-counterfeiting film, most of them are in the form of flat two-dimensional labels, which makes it difficult to obtain richer visual and tactile beauty and anti-counterfeiting requirements. In today's society, high-end products have more and more requirements for anti-counterfeiting and aesthetics. The existing ordinary two-dimensional anti-counterfeiting technology can no longer meet social requirements. Therefore, there is an urgent need for a naked-eye 3D visual effect anti-counterfeiting film that is both beautiful and tactile and not easy to be imitated. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an optical 3D anti-counterfeiting film and a method for making and using the same, so as to solve the problem that the existing two-dimensional anti-counterfeiting film is easy to be counterfeited and has only a two-dimensional visual effect.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] In a first aspect, a method for manufacturing an optical 3D anti-counterfeiting film is provided, comprising the following steps:

[0006] Providing a substrate and using the substrate as a carrier body;

[0007] The polymer thermoplastic coating is evenly coated on the substrate by an anilox roller coating method, and the polymer coating is obtained after baking;

[0008] A lens protection layer having a plurality of array-distributed concave microlenses is manufactured, wherein the lens protection layer, the polymer coating and the substrate are connected to form a releasable composite layer;

[0009] A light-transmitting layer, a pattern layer and an adhesive layer are sequentially formed on the composite layer, wherein the light-transmitting layer includes a lens portion with a plurality of convex microlenses distributed in an array and a light-transmitting portion carrying the pattern layer, wherein the thickness of the light-transmitting portion is within the focal length range of the convex microlens imaging, and the light-transmitting layer, the pattern layer and the adhesive layer are connected to form an anti-counterfeiting film body;

[0010] A release film layer is arranged on the adhesive layer, and the release film layer can be separated from the anti-counterfeiting film body.

[0011] In a possible implementation, manufacturing a lens protection layer having a plurality of array-distributed concave microlenses includes the following method:

[0012] A resin material is transferred onto a first PC sheet through a microlens mold by film shielding exposure to obtain a first PC sheet mold having a plurality of microlenses distributed in an array, wherein the crown spherical surface structure of the microlenses on the first PC sheet mold is in a convex state;

[0013] The microlenses on the first PC sheet mold are transferred onto the polymer UV material by an embossing device to obtain a polymer UV material layer with array-distributed microlenses. The polymer UV material layer serves as a lens protection layer, and the crown spherical surface structure of the microlenses is in a concave state.

[0014] In a possible implementation, a resin material is transferred to a PC sheet through a microlens mold by film shielding exposure, including the following methods:

[0015] UV resin glue is evenly placed on the microlens mold and compounded with the first PC sheet, and a roller is used to squeeze the microlens mold and the first PC sheet from one end to the other end, so that the microlens mold, UV resin glue and the first PC sheet are completely attached together;

[0016] The transparent part and the black shielding part of the film are used to expose the UV resin glue to ultraviolet light, so that the transparent part of the film is irradiated with ultraviolet light, and the UV resin glue is cross-linked and cured under the action of ultraviolet light;

[0017] The first PC sheet and the microlens mold are separated, and the UV resin glue that has not been UV-cured is cleaned to obtain the first PC sheet mold with honeycomb-arranged microlenses.

[0018] In a possible implementation, a light-transmitting layer, a pattern layer and an adhesive layer are sequentially manufactured on the composite layer, including the following method:

[0019] Using UV resin material as the light-transmitting layer;

[0020] The pattern mold is transferred onto the second PC sheet by UV resin glue to obtain a second PC sheet mold with a pattern structure;

[0021] The pattern structure of the second sheet mold is transferred to the bottom of the light-transmitting layer by a UV resin transfer device to form a pattern structure layer, and the UV resin material on the top of the light-transmitting layer fills and covers each concave microlens of the lens protection layer to form a lens part with convex microlenses;

[0022] Filling ink in the grooves of the pattern structure or providing a reflective layer;

[0023] A graphic printing layer is formed on the graphic structure layer, and the graphic printing layer and the graphic structure layer form a graphic layer;

[0024] An adhesive layer is disposed on the texture layer.

[0025] In a possible implementation, the step of filling ink or setting a reflective layer in the grooves of the pattern structure also includes the following method:

[0026] The corresponding rotation angles and XY directions of the convex micro-lens and pattern structure of the lens part are strictly aligned, the rotation angle is ±1 degree and the alignment accuracy of the XY directions is ±1um.

[0027] In a possible implementation, when a reflective layer is provided in the grooves of the pattern structure, the step includes the following method:

[0028] A metal reflective layer is plated on one side of the light-transmitting layer provided with the pattern structure layer by vacuum coating;

[0029] The metal reflective layer on the light-transmitting layer is removed outside the pattern structure according to the groove morphology of the pattern structure by high-precision etching equipment to obtain a pattern structure layer with metal reflection.

[0030] In a possible implementation, printing a graphic layer on the pattern structure layer includes the following method:

[0031] The designed graphics are printed onto the pattern structure layer through a printing device to obtain a printing ink layer with single-color or multi-color graphics.

[0032] In a possible implementation, the substrate is an acrylic film or a polyethylene terephthalate film, and the thickness of the substrate is 50 um±2 um.

[0033] In a second aspect, an optical 3D anti-counterfeiting film is also provided, which is produced by the method for producing an optical 3D anti-counterfeiting film of any of the above technical solutions.

[0034] In a third aspect, a method for using an optical 3D anti-counterfeiting film is also provided. The optical 3D anti-counterfeiting film is the optical 3D anti-counterfeiting film described above, including the following method:

[0035] Remove the release film layer of the optical 3D anti-counterfeiting film and stick it on the carrier;

[0036] The composite layer is peeled off to expose the light-transmitting layer having the array-arranged outwardly convex micro-lenses on the outer surface.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The optical 3D anti-counterfeiting film and its manufacturing method and use method of the present invention use a substrate as a carrier body and sequentially manufacture a composite layer, an anti-counterfeiting film body and a release film layer on the substrate, which can not only facilitate the manufacture of a light-transmitting layer, a pattern layer and an adhesive layer to improve the manufacturing efficiency, but also effectively protect the lens part of the light-transmitting layer during the manufacturing process, and through the lens part and the light-transmitting part of the light-transmitting layer, it is convenient to guide the graphic information of the pattern layer to the left and right eyes respectively through different viewing angles, so that people can see the 3D effect when observing the anti-counterfeiting film logo, which significantly improves the visual experience. Such a visual effect can It can better increase the difficulty of counterfeiting and reduce counterfeiting. At the same time, once the optical 3D anti-counterfeiting film is transferred to a carrier, such as (paper packaging box, injection molding packaging box, certificate book, etc.), the initial carrier base film is peeled off. At this time, the logo is in the state of initial carrier without substrate, leaving only multiple layers of cross-linked polymer material as the anti-counterfeiting film body, and the carrier of the anti-counterfeiting film body has been converted into a carrier such as (paper packaging box, injection molding packaging box, certificate book, etc.). Through the complete bonding of the pressure-sensitive adhesive and the carrier, the anti-counterfeiting film cannot be completely removed from the carrier, which makes counterfeiting difficult and has strong anti-counterfeiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of an optical 3D anti-counterfeiting film;

[0040] Figure 2 It is a schematic diagram of the structure of an optical 3D anti-counterfeiting film when it is pasted on a carrier during use;

[0041] Figure 3 It is a schematic diagram of the structure of an optical 3D anti-counterfeiting film when a reflective layer is arranged in the groove of the pattern structure layer;

[0042] Figure 4 It is a schematic diagram of the structure of an optical 3D anti-counterfeiting film when ink is set in the groove of the pattern structure layer;

[0043] Figure 5 A plan view of a lens portion of an optical 3D anti-counterfeiting film;

[0044] Figure 6 It is a process flow chart of a method for manufacturing an optical 3D anti-counterfeiting film;

[0045] Figure 7 A schematic diagram of a method for making an optical 3D anti-counterfeiting film, wherein a polymer coating is made on a substrate;

[0046] Figure 8 It is a structural schematic diagram of a first PC sheet mold and a microlens mold when making a first PC sheet mold in a method for making an optical 3D anti-counterfeiting film;

[0047] Fig. 9It is a structural schematic diagram of a composite layer and a first PC sheet mold when manufacturing a lens protection layer in a method for manufacturing an optical 3D anti-counterfeiting film;

[0048] Fig.10 A method for manufacturing an optical 3D anti-counterfeiting film is provided. When manufacturing a lens protection layer, a lens in the lens protection layer is solidified by a UV light source;

[0049] Fig.11 A schematic diagram of the structure of a method for manufacturing an optical 3D anti-counterfeiting film in manufacturing a pattern mold and a second sheet mold;

[0050] Fig.12 It is a structural schematic diagram of a method for manufacturing an optical 3D anti-counterfeiting film after a graphic structure is formed on a light-transmitting layer;

[0051] Fig.13 A method for making an optical 3D anti-counterfeiting film Fig.12 Schematic diagram of the structure after filling ink on the basis;

[0052] Fig.14 A method for making an optical 3D anti-counterfeiting film Fig.12 Schematic diagram of a reflective layer after being set on the basis and a redundant metal reflective layer after being removed;

[0053] Fig.15 A method for making an optical 3D anti-counterfeiting film Fig.13 A schematic diagram of a structure in which a graphic printing layer is arranged on the basis of the present invention;

[0054] Fig.16 A method for making an optical 3D anti-counterfeiting film Fig.15 A schematic diagram of the structure of a pressure-sensitive layer and a release film layer being arranged on the basis of the pressure-sensitive layer.

[0055] In the figure: 0-positioning point; 01-composite layer; 02-anti-counterfeiting film body; 03-carrier; 1-substrate; 2-polymer coating; 3-lens protection layer; 31-concave microlens; 4-lens part; 5-light-transmitting part; 6-pattern structure layer; 61-groove; 63-reflective layer; 7-ink; 8-graphic printing layer; 9-adhesion layer; 10-release film layer; 11-microlens mold; 12-first PC sheet mold; 13-ultraviolet light source; 14-pattern mold; 15-second PC sheet mold. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0057] Please refer to Figure 1-16 As shown, an embodiment of the present application provides a method for manufacturing an optical 3D anti-counterfeiting film, comprising the following steps:

[0058] Step S100: providing a substrate 1 and using the substrate 1 as a carrier.

[0059] In this step, the substrate 1 is used as the supporting body for making the optical 3D anti-counterfeiting film, and the substrate 1 is used as the supporting layer for stacking and production. This production method can facilitate the production of structural layers such as the light-transmitting layer, the pattern layer and the adhesion layer 9, thereby improving the production efficiency, and can also effectively protect the lens part 4 of the light-transmitting layer during the production process.

[0060] Step S200: a polymer thermoplastic coating is uniformly coated on the substrate 1 by an anilox roller coating method, and a polymer coating 2 is obtained after baking.

[0061] In this step, the prepared polymer coating 2 can be conveniently used as a connecting layer between the substrate 1 and the lens protective layer 3. The polymer coating 2 can make the lens protective layer 3 and the substrate 1 undergo a good cross-linking reaction, so that the lens protective layer 3 and the substrate 1 can be stably and firmly connected, and can also be easily separated from the mold. In the specific implementation process, the polymer thermoplastic coating is evenly coated on the substrate 1 by an anilox roller coating method, and after being baked in a coating machine drying oven to volatilize the organic solvent, a polymer coating 2 with a coating dry weight of 0.06-0.08g / ㎡ is obtained.

[0062] Step S300: manufacturing a lens protection layer 3 having a plurality of concave microlenses 31 distributed in an array, wherein the lens protection layer 3, the polymer coating 2 and the substrate 1 are connected to form a removable composite layer 01.

[0063] In this step, the material of the lens protection layer 3 is the same as that of the light-transmitting layer, and the concave structure formed by the production thereof is also regarded as a microlens, so that the concave microlens 31 can be easily buried in the light-transmitting layer when producing the convex microlens, thereby facilitating the formation of a convex microlens with a matching shape, and can also be beneficial for protecting the convex microlens through such a mutually matching structure; the lens protection layer 3, the polymer coating 2 and the substrate 1 are connected to form a composite layer 01, and the lens protection layer 3 with a release type can facilitate the overall release and separation of the composite layer 01.

[0064] Step S400: A light-transmitting layer, a pattern layer and an adhesive layer 9 are sequentially manufactured on the composite layer 01. The light-transmitting layer includes a lens portion 4 having a plurality of convex microlenses distributed in an array and a light-transmitting portion 5 carrying the pattern layer. The thickness of the light-transmitting portion 5 is within the focal length range of the convex microlens imaging. The light-transmitting layer, the pattern layer and the adhesive layer 9 are connected to form the anti-counterfeiting film body 02.

[0065] In this step, a light-transmitting layer, a pattern layer and an adhesive layer 9 are sequentially manufactured on the composite layer 01, wherein the light-transmitting layer has a lens portion 4 and a light-transmitting portion 5, and the convex microlenses of the lens portion 4 and the light-transmitting portion 5 can conveniently guide the light reflected by the pattern layer to the left and right eyes of the person from different angles, thereby obtaining a 3D stereoscopic effect and significantly improving the visual experience; the light-transmitting layer, the pattern layer and the adhesive layer 9 are connected to form an anti-counterfeiting film body 02, and the anti-counterfeiting film body 02 needs to be attached to a carrier such as a wine bottle, and the convex microlenses of the lens portion 4 can be exposed to the outside, so as to better show the three-dimensional visual effect.

[0066] Step S500: a release film layer 10 is disposed on the adhesive layer 9 , and the release film layer 10 is separable from the anti-counterfeit film body 02 .

[0067] In this step, the release film layer 10 on the adhesive layer 9 can be removed, and after removal, the adhesive layer 9 can be adhered and connected to the carrier, and the anti-counterfeit film body 02 can be fixed through the adhesive layer 9 .

[0068] Through the above technical solution, the substrate 1 is used as the carrier body and the composite layer 01, the anti-counterfeiting film body 02 and the release film layer 10 are sequentially manufactured on the substrate 1, which can not only facilitate the manufacture of the light-transmitting layer, the pattern layer and the adhesive layer 9 to improve the manufacturing efficiency, but also effectively protect the lens part 4 of the light-transmitting layer during the manufacturing process, and through the lens part 4 and the light-transmitting part 5 of the light-transmitting layer, the graphic information of the pattern layer can be guided to the left and right eyes respectively through different viewing angles, so that people can see the 3D effect when observing the anti-counterfeiting film logo, which significantly improves the visual experience. Such a visual effect can better provide a reference for counterfeiting. The difficulty is increased and counterfeiting is reduced. At the same time, once the optical 3D anti-counterfeiting film is transferred to a carrier 03, such as (a paper packaging box, an injection-molded packaging box, an ID book, etc.), the initial carrier substrate is peeled off. At this time, the anti-counterfeiting mark is in a state of initial carrier without the substrate 1, and only a multi-layer cross-linked anti-counterfeiting film body 02 remains. The carrier of the anti-counterfeiting film body 02 has been converted into a carrier 03 such as (a paper packaging box, an injection-molded packaging box, an ID book, etc.). Through the complete bonding of the adhesive layer 9 and the carrier 03, the anti-counterfeiting film mark cannot be completely removed from the carrier, which makes counterfeiting difficult and has a strong anti-counterfeiting effect.

[0069] In one embodiment, in combination Figure 7 and Figure 8 As shown, in step S300, a lens protection layer 3 having a plurality of array-distributed concave microlenses 31 is manufactured, including the following method:

[0070] Step S310: using a resin material to transfer to the first PC sheet through the microlens mold 11 by film masking exposure to obtain a first PC sheet mold 12 having a plurality of microlenses distributed in an array, wherein the crown spherical surface structure of the microlenses on the first PC sheet mold 12 is in a convex state.

[0071] In this step, the lens mold has a plurality of concave lens grooves distributed in an array. The shape of the concave lens grooves can be transferred to the first PC sheet mold 12 by means of resin material and film masking exposure. In this way, the lens morphology of the microlens mold 11 can be selectively replicated and cured to form. Thus, the first PC sheet mold 12 having a plurality of microlenses distributed in an array can be obtained. The crown spherical surface structure of the microlens on the first PC sheet mold 12 is in a convex state, which can facilitate the molding of the lens protection layer 3.

[0072] Step S320: The microlenses on the first PC sheet mold 12 are transferred onto the polymer UV material by means of an embossing device to obtain a polymer UV material layer having array-distributed microlenses. The polymer UV material layer serves as a lens protection layer 3, and the crown spherical surface structure of the microlenses is in a concave state.

[0073] In this step, the microlenses on the first PC sheet mold 12 can be used for the molding of the polymer UV material layer and for the embedding of the microlenses. The microlenses on the lens protection layer 3 can facilitate the protection of the lens portion 4 of the light-transmitting layer. Since the resin is not easy to adhere after curing, it is easy to separate. This can better facilitate the separation of the composite layer 01 and the protection of the lens portion 4 of the light-transmitting layer.

[0074] Further, combined with Fig. 9 and Fig.10 As shown, in step S310, a resin material is transferred onto a PC sheet through a microlens mold 11 in a film shielding exposure manner, including the following method:

[0075] Step S311: UV resin glue is evenly placed on the microlens mold 11 and compounded with the first PC sheet, and a roller is used to squeeze the microlens mold 11 and the first PC sheet from one end to the other end, so that the microlens mold 11, the UV resin glue, and the first PC sheet are completely attached together;

[0076] Step S312: using the transparent part and the black shielding part of the film to expose the UV resin glue to ultraviolet light, so that the transparent part of the film is irradiated with ultraviolet light and the UV resin glue is cross-linked and cured under the action of ultraviolet light;

[0077] Step S313: Separate the first PC sheet and the microlens mold 11, clean the UV resin glue that has not been UV-cured, and obtain the first PC sheet mold 12 with honeycomb-arranged microlenses.

[0078] In this way, the UV resin glue that has been cured by ultraviolet light is completely combined with the first PC sheet, and the morphology of the honeycomb-arranged microlenses on the mold is also replicated. The first PC sheet and the microlens mold 11 are separated, and the UV resin glue that has not been cured by ultraviolet light is cleaned to obtain the first PC sheet mold 12 with microlenses having a partial honeycomb arrangement. Specifically, the UV resin glue is evenly arranged on the microlens mold 11 with a honeycomb arrangement, and then the first PC sheet is compounded. At this time, a roller is used to squeeze the microlens mold 11 and the first PC sheet from one end to the other end so that the microlens mold 11, the UV resin glue, and the first PC sheet are completely attached together, and then the UV resin glue is exposed to ultraviolet light using the transparent part and the black shielding part of the film. After the transparent part of the film is irradiated with ultraviolet light, the UV resin glue is cross-linked and cured under the action of ultraviolet light, while the ultraviolet light cannot penetrate the black shielding part of the film, and the UV resin glue will not be cross-linked and cured.

[0079] After the above steps are completed, the UV transfer resin glue that has been UV-cured is completely combined with the PC sheet and the morphology of the honeycomb-arranged microlenses on the mold is also replicated. At this time, the PC sheet and the metal mold are separated, and the UV transfer resin glue that has not been UV-cured is cleaned to obtain a PC sheet mold with microlenses with a partial honeycomb arrangement.

[0080] In the specific implementation process, when the lens protection layer 3 is used to make the concave microlens 31, the positioning point 0 used for registration and alignment is copied through the positioning point 0 on the microlens mold 11. The positioning point 0 can be a convex block structure with color for marking and alignment. When copied on the lens protection layer 3, it is in a concave state. At the same time, the positioning point 0 can also be conducive to precise alignment when cutting the excess part of the anti-counterfeiting film, which is more convenient.

[0081] In addition, after the lens protection layer 3 made of polymer UV material is manufactured, the degree of crosslinking may not meet the requirements of subsequent processes. It can be further fully UV-cured through UV aging equipment or UV light source 13 to fully crosslink the polymer UV material internally and meet the release requirements of the subsequent processes.

[0082] Please refer to Figure 11-16 As shown, in step S400 of the embodiment of the present application, a light-transmitting layer, a pattern layer and an adhesive layer 9 are sequentially manufactured on the composite layer 01, including the following method:

[0083] Step S410: using UV resin material as the light-transmitting layer.

[0084] Step S420: transferring the pattern mold 14 onto the second PC sheet using UV resin glue to obtain a second PC sheet mold 15 having a pattern structure;

[0085] Step S430: the pattern structure of the second sheet mold is transferred to the bottom of the light-transmitting layer by a UV resin transfer device to form a pattern structure layer 6, and the UV resin material on the top of the light-transmitting layer fills and covers each concave microlens 31 of the lens protection layer 3 and forms a lens part 4 with convex microlenses;

[0086] Step S440: filling the grooves 61 of the pattern structure with ink 7 or providing a reflective layer 63;

[0087] Step S450: printing a graphic layer 8 on the graphic structure layer 6, so that the graphic printing layer 8 and the graphic structure layer 6 form a graphic layer;

[0088] Step S460: Disposing an adhesive layer 9 on the pattern layer.

[0089] The use of resin material to make the light-transmitting layer can facilitate the penetration of light, and thus facilitate the incidence and emission of light, and the use of resin material can facilitate the molding of the lens part 4 and the light-transmitting part 5. The pre-designed graphic shape can be transferred to the second PC sheet using UV resin glue through the pattern mold 14, and a second PC sheet mold 15 with a push structure can be obtained. The pattern structure can be easily transferred to the bottom of the light-transmitting part 5 of the light-transmitting layer through the second PC sheet mold 15, and a pattern structure layer 6 with grooves 61 can be formed. In addition, since the light-transmitting layer is a UV resin material, it is convenient to fill the top of the light-transmitting layer with each concave microlens 31 covering the lens protection layer 3 before it is cured and form a lens part 4 with a convex microlens. In this way, the lens part 4 can be molded, and it can be exposed after the composite layer 01 is removed. The grooves 61 of the pattern structure can be filled with ink 7 to show the pattern information, or a reflective layer 63 can be set in the groove, and information can also be displayed by cooperating with the reflective layer 63 that matches the extended distribution structure of the grooves 61. At the same time, in conjunction with the graphic printing layer 8, the required information can be displayed. The adhesive layer 9 is used to connect the release film layer 10 and to adhere to the carrier. When filling the grooves 61 with ink 7, the colored ink 7 can be evenly dispersed on the surface of the pattern structure layer 6 in advance, and then a rigid scraper is used to apply a certain pressure on the material surface to move in one direction. At this time, the ink 7 will be scraped off the material surface by the action of the rigid scraper, and the grooves 61 of the pattern structure layer 6 pre-set on the material will retain the ink 7, so that the colored ink 7 is retained in the pattern structure layer 6.

[0090] In order to improve the alignment accuracy, before step S440, the following method is also included:

[0091] Step S431: strictly align the corresponding rotation angles and XY directions of the convex micro-lens and the pattern structure of the lens part 4, the rotation angle is ±1 degree and the alignment accuracy of the XY directions is ±1um.

[0092] In this step, the positioning accuracy of the UV transfer equipment is used to ensure that the corresponding rotation angles and XY positions of the convex microlens and the pattern structure layer 6 are strictly aligned, the rotation angle is ±1 degree and the XY position alignment accuracy is ±1um.

[0093] In a preferred embodiment of the reflective layer 63, Fig.15 As shown, when the reflective layer 63 is provided in the groove 61 of the pattern structure, the step includes the following method:

[0094] Step S441: a metal reflective layer 63 is plated on one side of the light-transmitting layer provided with the pattern structure layer 6 by vacuum coating;

[0095] Step S442: using high-precision etching equipment to remove the metal reflective layer 63 on the light-transmitting layer outside the pattern structure according to the morphology of the grooves 61 of the pattern structure, thereby obtaining a pattern structure layer 6 with metal reflection.

[0096] The metal reflective layer 63 is plated on the light-transmitting layer with the pattern structure layer 6 by vacuum evaporation coating, and the thickness of the metal reflective coating layer is preferably 30-50nm. The metal reflective layer 63 on the light-transmitting layer of the polymer UV material is removed by high-precision etching equipment according to the morphology of the grooves 61 of the pattern structure, and the metal reflective layer 63 outside the pattern structure is removed, thereby obtaining the pattern structure layer 6 with metal reflection function.

[0097] In order to better display the pattern information, step S450 includes the following methods:

[0098] Step S451: Print the designed graphics onto the pattern structure layer 6 through a printing device to obtain a printing ink layer with single-color or multi-color graphics.

[0099] In this step, the positioning point 0 can be used to print the designed LOGO or geometric figures on the pattern structure layer 6 through a digital printer or other printing equipment, thereby obtaining a single-color or multi-color printing ink layer with the LOGO or geometric figures.

[0100] Specifically, the substrate 1 is an acrylic film or a polyethylene terephthalate film, and the thickness of the substrate 1 is 50 um ± 2 um. By using the acrylic film or the polyethylene terephthalate film as the substrate 1, the substrate 1 can have good hardness and toughness, and can be better used as a load-bearing body.

[0101] In some specific embodiments, the adhesive layer 9 is preferably a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer can be adhered to the support to make the connection more stable and not easy to be removed, thereby increasing the difficulty of imitation. The thickness of the polymer coating 2 on the substrate 1 is preferably less than or equal to 1um. The thickness of the lens portion 4 of the light-transmitting layer is 70um±1um. The caliber of the concave microlens 31 is 50um-60um, and the radius of curvature is 30um-36um. The depth of the groove 61 of the pattern structure layer 6 is 1-2um.

[0102] Combination Figure 1-5 As shown, an embodiment of the present application also provides an optical 3D anti-counterfeiting film, which is manufactured by the manufacturing method of the optical 3D anti-counterfeiting film of any of the above technical solutions.

[0103] The optical 3D anti-counterfeiting film produced by the above method adopts the combination of nano polymer material embossing process and micro lens array imaging to achieve the naked eye 3D visual effect without auxiliary equipment. In the stereoscopic vision system, in order for the observer to feel the three-dimensional effect, the image information corresponding to the left and right eyes needs to be accurately projected into the corresponding eyes respectively. The present invention uses special micro lenses to guide images of different perspectives to the left and right eyes respectively, so that people can see the 3D effect when observing the logo, which significantly improves the visual experience. It can easily distinguish the LOGO features of genuine products and suppress the occurrence of counterfeit goods.

[0104] In addition, combined Figure 1 and Figure 2 As shown, an embodiment of the present application further provides a method for using an optical 3D anti-counterfeiting film, wherein the optical 3D anti-counterfeiting film is the above-mentioned optical 3D anti-counterfeiting film, and comprises the following method:

[0105] Step S01: removing the release film layer 10 of the optical 3D anti-counterfeiting film and pasting it on a carrier;

[0106] Step S02: peeling off the composite layer 01, so that the light-transmitting layer having the array-arranged outwardly convex micro-lenses is exposed on the outer surface.

[0107] The release film layer 10 can be removed manually or by automatic labeling equipment and then attached to the carrier 03. At this time, the pressure-sensitive adhesive of the optical 3D anti-counterfeiting film is tightly attached to the carrier 03. Then the substrate 1 together with the polymer coating 2 and the lens protection layer 3 are peeled off and removed. At this time, the lens part 4 of the light-transmitting layer will be exposed on the surface, thereby obtaining an anti-counterfeiting mark with an optical 3D effect.

[0108] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for producing an optical 3D anti-counterfeiting film, characterized in that: The following steps are involved: Providing a substrate and using the substrate as a carrier body; The polymer thermoplastic coating is evenly coated on the substrate by an anilox roller coating method, and the polymer coating is obtained after baking; A lens protection layer having a plurality of array-distributed concave microlenses is manufactured, wherein the lens protection layer, the polymer coating and the substrate are connected to form a releasable composite layer; A light-transmitting layer, a pattern layer and an adhesive layer are sequentially formed on the composite layer, wherein the light-transmitting layer includes a lens portion with a plurality of convex microlenses distributed in an array and a light-transmitting portion carrying the pattern layer, wherein the thickness of the light-transmitting portion is within the focal length range of the convex microlens imaging, and the light-transmitting layer, the pattern layer and the adhesive layer are connected to form an anti-counterfeiting film body; A release film layer is arranged on the adhesive layer, and the release film layer can be separated from the anti-counterfeiting film body.

2. The method for manufacturing an optical 3D anti-counterfeiting film according to claim 1, characterized in that: A lens protection layer having a plurality of array-distributed concave microlenses is manufactured, comprising the following method: A resin material is transferred onto a first PC sheet through a microlens mold by film shielding exposure to obtain a first PC sheet mold having a plurality of microlenses distributed in an array, wherein the crown spherical surface structure of the microlenses on the first PC sheet mold is in a convex state; The microlenses on the first PC sheet mold are transferred onto the polymer UV material by an embossing device to obtain a polymer UV material layer with array-distributed microlenses. The polymer UV material layer serves as a lens protection layer, and the crown spherical surface structure of the microlenses is in a concave state.

3. The method for manufacturing an optical 3D anti-counterfeiting film according to claim 2, characterized in that: The resin material is transferred to the PC sheet through the microlens mold by film shielding exposure, including the following methods: UV resin glue is evenly placed on the microlens mold and compounded with the first PC sheet, and a roller is used to squeeze the microlens mold and the first PC sheet from one end to the other end, so that the microlens mold, UV resin glue and the first PC sheet are completely attached together; The transparent part and the black shielding part of the film are used to expose the UV resin glue to ultraviolet light, so that the transparent part of the film is irradiated with ultraviolet light, and the UV resin glue is cross-linked and cured under the action of ultraviolet light; The first PC sheet and the microlens mold are separated, and the UV resin glue that has not been UV-cured is cleaned to obtain the first PC sheet mold with honeycomb-arranged microlenses.

4. A method for producing an optical 3D anti-counterfeiting film according to any one of claims 1 to 3, characterized in that: The light-transmitting layer, the pattern layer and the adhesive layer are sequentially formed on the composite layer, including the following methods: Using UV resin material as the light-transmitting layer; The pattern mold is transferred onto the second PC sheet by UV resin glue to obtain a second PC sheet mold with a pattern structure; The pattern structure of the second sheet mold is transferred to the bottom of the light-transmitting layer by a UV resin transfer device to form a pattern structure layer, and the UV resin material on the top of the light-transmitting layer fills and covers each concave microlens of the lens protection layer to form a lens part with convex microlenses; Filling ink in the grooves of the pattern structure or providing a reflective layer; A graphic printing layer is formed on the graphic structure layer, and the graphic printing layer and the graphic structure layer form a graphic layer; An adhesive layer is disposed on the texture layer.

5. The method for manufacturing an optical 3D anti-counterfeiting film according to claim 4, characterized in that: The step of filling ink or setting a reflective layer in the grooves of the pattern structure also includes the following method: The corresponding rotation angles and XY directions of the convex micro-lens and pattern structure of the lens part are strictly aligned, the rotation angle is ±1 degree and the alignment accuracy of the XY directions is ±1um.

6. The method for manufacturing an optical 3D anti-counterfeiting film according to claim 4, characterized in that: When a reflective layer is provided in the grooves of the pattern structure, the step includes the following method: A metal reflective layer is plated on one side of the light-transmitting layer provided with the pattern structure layer by vacuum coating; The metal reflective layer on the light-transmitting layer is removed outside the pattern structure according to the groove morphology of the pattern structure by high-precision etching equipment to obtain a pattern structure layer with metal reflection.

7. The optical 3D anti-counterfeiting film according to claim 4, characterized in that: Printing a graphic layer on a pattern structure layer includes the following methods: The designed graphics are printed onto the pattern structure layer through a printing device to obtain a printing ink layer with single-color or multi-color graphics.

8. The method for manufacturing an optical 3D anti-counterfeiting film according to claim 1, characterized in that: The substrate is an acrylic film or a polyethylene terephthalate film, and the thickness of the substrate is 50 um±2 um.

9. An optical 3D anti-counterfeiting film, characterized in that: The optical 3D anti-counterfeiting film is manufactured by the manufacturing method of any one of claims 1 to 8.

10. A method for using an optical 3D anti-counterfeiting film, wherein the optical 3D anti-counterfeiting film is the optical 3D anti-counterfeiting film according to claim 9, characterized in that: The following methods are included: Remove the release film layer of the optical 3D anti-counterfeiting film and stick it on the carrier; The composite layer is peeled off to expose the light-transmitting layer having the array-arranged outwardly convex micro-lenses on the outer surface.

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