Optical 3D anti-counterfeiting film and manufacturing method and use method thereof

Abstract

The present application belongs to the technical field of anti-counterfeiting film, and discloses an optical 3D anti-counterfeiting film and a manufacturing method and a using method thereof. The base material is used as a bearing body, and a composite layer, an anti-counterfeiting film body and a release film layer are sequentially manufactured on the base material. The manufacturing efficiency is improved by facilitating the manufacturing of the light transmission layer, the pattern layer and the adhesive layer. The lens part of the light transmission layer is effectively protected during the manufacturing process. The lens part and the light transmission part of the light transmission layer facilitate the graphic information of the pattern layer to be guided to the left eye and the right eye respectively through different viewing angles, so that the person can see the 3D effect when observing the anti-counterfeiting film mark, and the visual experience is significantly improved. The visual effect can better increase the difficulty of counterfeiting and reduce counterfeiting. Once the optical 3D anti-counterfeiting film is transferred to the carrier and the initial bearing base film is peeled off and adhered to the carrier, the anti-counterfeiting film cannot be completely taken off from the carrier, and the difficulty of counterfeiting is high, and the anti-counterfeiting effect is strong.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of anti-counterfeiting film, and particularly relates to an optical 3D anti-counterfeiting film and a manufacturing method and a using method thereof. BACKGROUND

[0002] The anti-counterfeiting film for wine packaging is used as an anti-counterfeiting mark. The existing anti-counterfeiting films include low-temperature baking mark, high-temperature baking mark, non-dry adhesive paper mark, and thermal transfer mark. However, most of the wine anti-counterfeiting films are in the form of a two-dimensional plane label, and it is difficult to obtain more visual and tactile aesthetics and anti-counterfeiting requirements. In today's society, high-end commodities have more and more requirements for anti-counterfeiting and aesthetics, and the existing ordinary two-dimensional anti-counterfeiting technology cannot meet the social requirements, and therefore, there is an urgent need for a naked-eye 3D visual effect anti-counterfeiting film which is not easy to be imitated and has aesthetics and tactile feeling. SUMMARY

[0003] Therefore, the present application aims to provide an optical 3D anti-counterfeiting film and a manufacturing method and a using method thereof to solve the problem that the existing two-dimensional anti-counterfeiting film is easy to be imitated and has only two-dimensional visual effect.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

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

[0006] A substrate is provided and used as a bearing main body;

[0007] A high-molecular thermoplastic coating is uniformly coated on the substrate by a screen roller coating method, and a high-molecular coating is obtained after baking;

[0008] A lens protection layer having a plurality of array-distributed concave microlenses is manufactured, and the lens protection layer, the high-molecular coating, and the substrate are connected to form a composite layer which can be separated;

[0009] A light-transmitting layer, a pattern layer, and an adhesive layer are sequentially manufactured on the composite layer, the light-transmitting layer includes a lens part having a plurality of array-distributed convex microlenses and a light-transmitting part bearing the pattern layer, the thickness of the light-transmitting part is within the focal length range of the convex microlenses, and the light-transmitting layer, the pattern layer, and the adhesive layer are connected to form an anti-counterfeiting film main 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 main body.

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

[0012] The resin material is transferred to the first PC sheet through the microlens mold by the way of film mask exposure to obtain the first PC sheet mold with array distributed microlenses, and 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 to the polymer UV material by the embossing equipment to obtain the 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 the possible implementation, the resin material is transferred to the PC sheet through the microlens mold by the way of film mask exposure, including the following method:

[0015] The UV resin glue is uniformly arranged on the microlens mold and compounded with the first PC sheet, and the roller is used to extrude from one end to the other end of the microlens mold and the first PC sheet, so that the microlens mold, the 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 for ultraviolet exposure of the UV resin glue, so that the transparent part of the film is irradiated by ultraviolet light, and the UV resin glue is cross-linked and cured under the action of ultraviolet rays;

[0017] The first PC sheet and the microlens mold are separated, and the UV resin glue not subjected to ultraviolet curing is cleaned to obtain the first PC sheet mold with honeycomb arranged microlenses.

[0018] In the possible implementation, the light transmission layer, the pattern layer and the adhesion layer are sequentially made on the composite layer, including the following method:

[0019] The UV resin material is used as the light transmission layer;

[0020] The UV resin glue is transferred to the second PC sheet through the pattern mold to obtain the 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 transmission layer through the UV resin transfer equipment to form a pattern structure layer, and the UV resin material on the top of the light transmission layer fills and covers each concave microlens of the lens protection layer and forms a lens part with convex microlenses;

[0022] Ink or a reflective layer is filled in the groove of the pattern structure;

[0023] The graphic printing layer is printed on the pattern structure layer, and the graphic printing layer and the pattern structure layer form a pattern layer;

[0024] The adhesion layer is arranged on the pattern layer.

[0025] In the possible implementation, the step of filling the ink or setting the reflective layer in the groove of the pattern structure further comprises the following method before the step:

[0026] The rotation angle and the XY two-direction position of the convex microlens of the lens part and the pattern structure are strictly aligned, the rotation angle is ±1 degree, and the alignment accuracy of the XY two-direction position is ±1 um.

[0027] In the possible implementation, when the reflective layer is set in the groove of the pattern structure, the step comprises the following method:

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

[0029] The metal reflective layer on the light-transmitting layer is removed according to the groove morphology of the pattern structure by a high-precision etching device, so that the pattern structure layer with the metal reflection is obtained.

[0030] In the possible implementation, the graphic printing layer is printed on the pattern structure layer, and the following method is included:

[0031] The designed graphic is printed on the pattern structure layer by a printing device, so that a printing ink layer with single-color or multi-color graphic is obtained.

[0032] In the 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] The second aspect also provides an optical 3D anti-counterfeiting film made by the manufacturing method of the optical 3D anti-counterfeiting film according to any one of the technical solutions.

[0034] The third aspect also provides a use method of the optical 3D anti-counterfeiting film, and the optical 3D anti-counterfeiting film is the optical 3D anti-counterfeiting film described above, and the use method comprises the following method:

[0035] The release film layer of the optical 3D anti-counterfeiting film is removed and pasted on a carrier;

[0036] The composite layer is peeled off, and the light-transmitting layer with the array-arranged convex microlens is exposed on the outer surface.

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

[0038] The optical 3D anti-counterfeiting film, the manufacturing method and the use method thereof, by taking the substrate as the bearing body and sequentially manufacturing the composite layer, the anti-counterfeiting film body and the release film layer on the substrate, can facilitate the manufacturing of the light transmission layer, the pattern layer and the adhesive layer, improve the manufacturing efficiency, effectively protect the lens part of the light transmission layer during the manufacturing process, and through the lens part and the light transmission part of the light transmission 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 mark, and the visual experience is significantly improved. Such visual effect can better increase the difficulty of counterfeiting and reduce counterfeiting. Once the optical 3D anti-counterfeiting film is transferred and attached to the carrier such as a paper packaging box body, an injection-molded packaging box body, an identification card, etc., the initial bearing substrate is peeled off, at this time, the mark is in the state of no initial bearing substrate, only the multi-layer cross-linked polymer material is left as the anti-counterfeiting film body, and the bearing of the anti-counterfeiting film body has been converted into the carrier such as the paper packaging box body, the injection-molded packaging box body, the identification card, etc. Through complete adhesion of the pressure-sensitive adhesive and the carrier, the anti-counterfeiting film cannot be completely taken off from the carrier, the difficulty of counterfeiting is great, and the anti-counterfeiting strength is strong. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

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

[0043] Figure 5 It is a plan view of a lens part of an optical 3D anti-counterfeiting film;

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

[0045] Figure 7 It is a structural schematic diagram of a manufacturing method of an optical 3D anti-counterfeiting film for manufacturing a polymer coating on a substrate;

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

[0047] Figure 9A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured;

[0048] Figure 10 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured;

[0049] Figure 11 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured;

[0050] Figure 12 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured;

[0051] Figure 13 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured; Figure 12 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured;

[0052] Figure 14 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured; Figure 12 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured;

[0053] Figure 15 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured; Figure 13 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured;

[0054] Figure 16 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured. Figure 15 A structure diagram of a composite layer and a first PC sheet mold in a manufacturing process of an optical 3D anti-counterfeiting film when a lens protection layer is manufactured.

[0055] In the figure: 0-positioning point; 01-composite layer; 02-anti-counterfeiting film main body; 03-bearer; 1-base material; 2-high molecular coating layer; 3-lens protection layer; 31-internal concave microlens; 4-lens part; 5-translucent part; 6-pattern structure layer; 61-groove; 63-reflective layer; 7-ink; 8-printed pattern 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 for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with specific embodiments.

[0057] Please refer to Figures 1-16 , the embodiment of the present application provides a manufacturing method of an optical 3D anti-counterfeiting film, which comprises the following steps:

[0058] Step S100: providing a substrate 1 and taking the substrate 1 as a bearing body.

[0059] In this step, the substrate 1 is taken as a bearing body for making the optical 3D anti-counterfeiting film, and the substrate 1 is taken as a bearing layer for superposition making. Through such a making method, the structure layers such as the light transmission layer, the pattern layer and the adhesive layer 9 can be conveniently made, so as to improve the making efficiency, and the lens part 4 of the light transmission layer can be effectively protected during the making process.

[0060] Step S200: uniformly coating a high-molecular thermoplastic paint on the substrate 1 by a screen roller coating method, and obtaining a high-molecular coating layer 2 after baking.

[0061] In this step, the high-molecular coating layer 2 can be conveniently taken as a connecting layer between the substrate 1 and the lens protection layer 3. Through the high-molecular coating layer 2, the lens protection layer 3 and the substrate 1 can be well crosslinked, so as to stably and firmly connect the lens protection layer 3 and the substrate 1, and facilitate the release separation. In the specific implementation process, the high-molecular thermoplastic paint is uniformly coated on the substrate 1 by the screen roller coating method, and the high-molecular coating layer 2 with a coating dryness of 0.06-0.08 g / m2 is obtained after baking the volatile organic solvent in the baking tunnel of the coating machine.

[0062] Step S300: making a lens protection layer 3 with a plurality of array-distributed concave microlenses 31, and connecting the lens protection layer 3, the high-molecular coating layer 2 and the substrate 1 to form a composite layer 01 which can be release-separated.

[0063] In this step, the material of the lens protection layer 3 is the same as that of the light transmission layer, and the concave structure formed by the lens protection layer 3 is also regarded as a microlens. Therefore, the concave microlens 31 can facilitate the light transmission layer to fill in the concave microlens 31 when the convex microlens is made, so as to form a convex microlens with a matched shape, and the concave microlens 31 can also protect the convex microlens through the matched structure. The lens protection layer 3, the high-molecular coating layer 2 and the substrate 1 are connected to form a composite layer 01, and the lens protection layer 3 with the release type can facilitate the release separation of the composite layer 01 as a whole.

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

[0065] In this step, the light-transmitting layer, the pattern layer and the adhesive layer 9 are sequentially made on the composite layer 01, wherein the light-transmitting layer has the lens portion 4 and the light-transmitting portion 5, the outer convex microlens of the lens portion 4 and the light-transmitting portion 5 can facilitate the light reflected by the pattern layer to be projected and guided to the left and right eyes of a 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 the anti-fake film main body 02, which needs to be attached to a carrier such as a wine bottle, and the outer convex microlens of the lens portion 4 can be exposed, so as to better exhibit the stereoscopic visual effect.

[0066] Step S500: A release film layer 10 is arranged on the adhesive layer 9, and the release film layer 10 is separable from the anti-fake film main body 02.

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

[0068] Through the above technical solution, the substrate 1 is used as the carrier main body, and the composite layer 01, the anti-fake film main body 02 and the release film layer 10 are sequentially made on the substrate 1, which can facilitate the production of the light-transmitting layer, the pattern layer and the adhesive layer 9 to improve the production efficiency, and can effectively protect the lens portion 4 of the light-transmitting layer during the production process. Through the lens portion 4 and the light-transmitting portion 5 of the light-transmitting layer, the pattern information of the pattern layer can be guided to the left and right eyes through different viewing angles, so that a person can see the 3D effect when observing the anti-fake film mark, thereby significantly improving the visual experience. Such visual effect can better increase the difficulty of imitation and reduce the imitation, and at the same time, once the optical 3D anti-fake film is transferred to be attached to the carrier 03 such as a paper packaging box body, an injection-molded packaging box body, an identification card, etc., the initial carrier substrate is peeled off, at this time, the anti-fake mark is in a state of no initial carrier substrate 1, only the multi-layer cross-linked anti-fake film main body 02 is left, and the carrier of the anti-fake film main body 02 has been converted to the carrier 03 such as a paper packaging box body, an injection-molded packaging box body, an identification card, etc. Through the complete adhesion of the adhesive layer 9 and the carrier 03, the anti-fake film mark cannot be completely taken off from the carrier, the difficulty of imitation is high, and the anti-fake effect is strong.

[0069] In an embodiment, in combination with the embodiments shown in Figure 7 and Figure 8 In step S300, the lens protection layer 3 having a plurality of array-distributed concave microlenses 31 is made, including the following methods:

[0070] Step S310: resin material is transferred to the first PC sheet by micro-lens mold 11 through the way of film mask exposure, and a first PC sheet mold 12 with arrayed micro-lenses is obtained, the crown spherical surface structure of the micro-lenses on the first PC sheet mold 12 is convex.

[0071] In this step, the lens mold has several arrayed concave lens grooves, the shape of the concave lens groove can be transferred to the first PC sheet mold 12 by resin material and in the way of film mask exposure, so that the lens topography of the micro-lens mold 11 can be selectively copied and solidified, thereby obtaining the first PC sheet mold 12 with arrayed micro-lenses, the crown spherical surface structure of the micro-lenses on the first PC sheet mold 12 is convex, which can facilitate the molding of the lens protection layer 3.

[0072] Step S320: the micro-lenses on the first PC sheet mold 12 are transferred to the polymer UV material layer by the stamping equipment, and a polymer UV material layer with arrayed micro-lenses is obtained, the polymer UV material layer serves as the lens protection layer 3, and the crown spherical surface structure of the micro-lenses is concave.

[0073] In this step, the micro-lenses on the first PC sheet mold 12 can be used for the molding of the polymer UV material layer and the embedding of the micro-lenses, the micro-lenses on the lens protection layer 3 can facilitate the protection of the lens part 4 of the light transmission layer, and since the resin is not easy to adhere after solidification, it is easy to separate, so as to better facilitate the separation of the composite layer 01 and the protection of the lens part 4 of the light transmission layer.

[0074] Further, in combination with the embodiments shown in Figure 9 and Figure 10 in step S310, resin material is transferred to the PC sheet by micro-lens mold 11 in the way of film mask exposure, including the following methods:

[0075] Step S311: uniformly set UV resin glue on the micro-lens mold 11 and composite the first PC sheet, and use the roller to extrude from one end to the other end of the micro-lens mold 11 and the first PC sheet, so that the micro-lens mold 11, the UV resin glue and the first PC sheet are completely attached together;

[0076] Step S312: the transparent part and the black shielding part of the film are used for ultraviolet exposure of the UV resin glue, so that the transparent part of the film is irradiated by ultraviolet light, and the UV resin glue is cross-linked and solidified under the action of ultraviolet light;

[0077] Step S313: separate the first PC sheet and the micro-lens mold 11, and clean the UV resin glue which has not been solidified by ultraviolet, and obtain the first PC sheet mold 12 with honeycomb arranged micro-lenses.

[0078] In this way, the UV resin glue which is ultraviolet cured is combined with the first PC sheet and replicates the honeycomb arrangement microlens on the mold, separates the first PC sheet and the microlens mold 11, and the UV resin glue which is not ultraviolet cured is cleaned to obtain the first PC sheet mold 12 with local honeycomb arrangement microlens. Specifically, the UV resin glue is uniformly arranged on the microlens mold 11 with honeycomb arrangement, and then the first PC sheet is compounded. At this time, the microlens mold 11, the UV resin glue and the first PC sheet are completely adhered together by rolling the microlens mold 11 and one end of the first PC sheet to the other end. Then, the UV resin glue is ultraviolet exposed by using the transparent part and the black shielding part of the film. The UV resin glue is cross-linked and cured under the action of ultraviolet light after the transparent part of the film is irradiated by ultraviolet light, while the black shielding part of the film cannot cross-link and cure because the ultraviolet light cannot penetrate the UV resin glue.

[0079] After the above steps are completed, the UV transfer resin glue which is ultraviolet cured is combined with the PC sheet and replicates the honeycomb arrangement microlens on the mold. At this time, the PC sheet and the metal mold are separated, and the UV transfer resin glue which is not ultraviolet cured is cleaned to obtain the PC sheet mold with local honeycomb arrangement microlens.

[0080] In the specific implementation process, the positioning point 0 for registration and alignment is also replicated on the microlens mold 11 when the lens protection layer 3 is made into the concave microlens 31. The positioning point 0 can be a protruding block structure with color for marking alignment. When it is replicated on the lens protection layer 3, it is in a concave state. Meanwhile, the positioning point 0 can also facilitate accurate alignment when cutting the excess part of the anti-fake film, which is more convenient.

[0081] In addition, after the lens protection layer 3 made of high-molecular UV material is made, the cross-linking degree may not meet the requirements of the subsequent process. The high-molecular UV material can be further ultraviolet cured by the ultraviolet aging equipment or the ultraviolet light source 13 to make the internal high-molecular UV material fully cross-linked and meet the requirements of the later process.

[0082] Please refer to Figures 11-16 In step S400 of the embodiment of the present application, a light-transmitting layer, a pattern layer and an adhesive layer 9 are sequentially made on the composite layer 01, including the following methods:

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

[0084] Step S420: UV resin glue is transferred to the second PC sheet by the pattern mold 14 to obtain the second PC sheet mold 15 with pattern structure.

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

[0086] Step S440: fill the ink 7 or set a reflective layer 63 in the groove 61 of the pattern structure;

[0087] Step S450: print a graphic layer 8 on the pattern structure layer 6, and the graphic layer 8 and the pattern structure layer 6 form a pattern layer;

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

[0089] The resin material used to make the light transmission layer can facilitate the penetration of light, thereby facilitating the incidence and emission of light, and the use of resin material can facilitate the molding of the lens part 4 and the light transmission part 5. The UV resin glue can be used to transfer the pre-designed graphic shape to the second PC sheet through the pattern mold 14 to obtain a second PC sheet mold 15 with a graphic structure, and the graphic structure can be transferred to the bottom of the light transmission part 5 of the light transmission layer through the second PC sheet mold 15 to form a pattern structure layer 6 with a groove 61, and the light transmission layer can facilitate the filling and covering of the top of each inner concave microlens 31 of the lens protection layer 3 to form a lens part 4 with outer convex microlenses when the light transmission layer is not yet cured, so that the lens part 4 can be molded and exposed after the removal of the composite layer 01. The groove 61 of the pattern structure can be filled with ink 7 to show the graphic information, or a reflective layer 63 can be set in the groove to display information by matching the reflective layer 63 with the extension and distribution structure of the groove 61, and by cooperating with the graphic 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 the groove 61 is filled with ink 7, the colored ink 7 can be uniformly dispersed on the surface of the pattern structure layer 6 in advance, and then a steel scraper is used to apply a certain pressure to the material surface and move in one direction, at this time the ink 7 is scraped off from the material surface by the action of the steel scraper, and the ink 7 in the groove 61 of the pattern structure layer 6 set in advance on the material is retained, so that the ink 7 with color is left in the pattern structure layer 6.

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

[0091] Step S431: the outer convex microlenses of the lens part 4 and the corresponding rotation angle and XY two-direction position of the pattern structure are strictly aligned, the rotation angle is ±1 degree and the alignment accuracy of the XY two-direction position is ±1 um.

[0092] In this step, the positioning accuracy of the positioning UV transfer equipment is used to ensure that the rotation angle and the XY position 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 ±1 um.

[0093] In a preferred embodiment of the reflective layer 63, the reflective layer 63 is provided in the groove 61 of the pattern structure, and the step includes the following method: Figure 15 As shown in the figure, 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 the light-transmitting layer side provided with the pattern structure layer 6 by vacuum plating.

[0095] Step S442: The metal reflective layer 63 on the light-transmitting layer is removed according to the groove 61 morphology of the pattern structure by a high-precision etching device, and a pattern structure layer 6 with a metal reflection is obtained.

[0096] A metal reflective layer 63 is plated on the light-transmitting layer with a pattern structure layer 6 by vacuum evaporation plating, and the metal reflective plating layer thickness is best at 30-50 nm. The metal reflective layer 63 on the light-transmitting layer of the high-molecular UV material is removed according to the groove 61 morphology of the pattern structure by a high-precision etching device, and a pattern structure layer 6 with a metal reflection function is obtained.

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

[0098] Step S451: The designed pattern is printed onto the pattern structure layer 6 by a printing device to obtain a printed ink layer with single-color or multi-color pattern.

[0099] In this step, the designed LOGO or geometric pattern can be printed onto the pattern structure layer 6 by a digital printer or other printing device through the positioning point 0, so as to obtain a printed ink layer with single-color or multi-color LOGO or geometric pattern.

[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 an acrylic film or a polyethylene terephthalate film as the substrate 1, the substrate 1 has good hardness and certain toughness, and can better serve as a load-bearing body.

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

[0102] In combination Figures 1-5 As shown, the embodiments of the present application also provide an optical 3D anti-counterfeiting film made by the method of making the optical 3D anti-counterfeiting film according to any one of the technical solutions described above.

[0103] The optical 3D anti-counterfeiting film made by the method described above realizes naked-eye 3D visual effect without auxiliary equipment by combining nano-polymer material imprinting process and micro-lens array imaging. In a stereoscopic vision system, in order to make the observer feel the three-dimensional effect, the image information corresponding to the left and right eyes needs to be accurately projected into the corresponding eyes, and the present application uses special micro-lenses to guide the images of different viewing angles to the left and right eyes, so that people can see the 3D effect when observing the logo, thereby significantly improving the visual experience. The LOGO features of the genuine product can be easily distinguished, and the occurrence of counterfeit products can be inhibited.

[0104] In addition, in combination Figure 1 and Figure 2 As shown, the embodiments of the present application also provide a use method of an optical 3D anti-counterfeiting film, the optical 3D anti-counterfeiting film being the optical 3D anti-counterfeiting film described above, comprising 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 to expose the light-transmitting layer with array-arranged convex micro-lenses to the outer surface.

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

[0108] The above merely describes the preferred embodiments of the present application, and it should be pointed out that the above preferred embodiments should not be regarded as a limitation to the present application, and the protection scope of the present application should be defined by the scope of the claims. For those skilled in the art, several improvements and refinements can be made without departing from the spirit and scope of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A method for manufacturing an optical 3D anti-counterfeiting film, characterized in that, Includes the following steps: Provide the substrate and use the substrate as the main load-bearing body; A polymer thermoplastic coating is uniformly applied to the substrate using an anilox roller, and then baked to obtain a polymer coating. A lens protective layer with several arrayed concave microlenses is fabricated, and the lens protective layer, polymer coating and substrate are connected to form a release-separable composite layer. A light-transmitting layer, a pattern layer, and an adhesive layer are sequentially fabricated on the composite layer. The light-transmitting layer includes a lens portion with several outwardly convex microlenses arranged in an array and a light-transmitting portion that carries the pattern layer. The thickness of the light-transmitting portion is within the focal length range of the outwardly convex microlenses. The light-transmitting layer, the pattern layer, and the adhesive layer are connected to form the anti-counterfeiting film body. A release film layer is set on the adhesive layer, and the release film layer can be separated from the anti-counterfeiting film body; Fabricating a lens protective layer with several arrayed concave microlenses includes the following methods: Resin material is transferred onto a first PC sheet using a microlens mold and film masking exposure, resulting in a first PC sheet mold with a plurality of microlenses arranged in an array. The crown spherical 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 using an imprinting device to obtain a polymer UV material layer with arrayed microlenses. The polymer UV material layer serves as a lens protective layer, and the crown spherical structure of the microlenses is concave. The resin material is transferred onto PC sheet using a microlens mold and film masking exposure, including the following methods: UV resin adhesive is evenly applied to the microlens mold and the first PC sheet is laminated on it. A roller is used to press the microlens mold and the first PC sheet from one end to the other so that the microlens mold, UV resin adhesive and the first PC sheet are completely bonded together. The UV resin adhesive is exposed to ultraviolet light using the transparent and black masking parts of the film. After the transparent part of the film is irradiated with ultraviolet light, the UV resin adhesive undergoes cross-linking and curing under the action of ultraviolet light. The first PC sheet and the microlens mold are separated, and the UV resin adhesive that has not been cured by ultraviolet light is cleaned to obtain the first PC sheet mold with a honeycomb arrangement of microlenses.

2. The method for manufacturing an optical 3D anti-counterfeiting film as described in claim 1, characterized in that, The light-transmitting layer, pattern layer, and adhesive layer are sequentially fabricated on the composite layer, including the following methods: UV resin material is used as the light-transmitting layer; The patterned mold is transferred onto the second PC sheet using UV resin adhesive to obtain a second PC sheet mold with a patterned structure. The pattern structure of the second sheet mold is transferred to the bottom of the light-transmitting layer using a UV resin transfer printing device to form a pattern structure layer. The UV resin material on the top of the light-transmitting layer fills and covers each concave microlens of the lens protective layer and forms a lens portion with convex microlenses. Fill the grooves of the patterned structure with ink or set a reflective layer; A graphic printing layer is applied on the graphic structure layer, and the graphic printing layer and the graphic structure layer together form a graphic layer. An adhesion layer is applied to the pattern layer.

3. The method for manufacturing an optical 3D anti-counterfeiting film as described in claim 2, characterized in that, The steps of filling the grooves of the patterned structure with ink or setting a reflective layer include the following methods: The convex microlens of the lens section and the corresponding rotation angle and XY position of the pattern structure are strictly aligned, with the rotation angle being ±1 degree and the alignment accuracy of the XY position being ±1µm.

4. The method for manufacturing an optical 3D anti-counterfeiting film as described in claim 2, characterized in that, When setting a reflective layer in the grooves of a patterned structure, this step includes the following methods: A metallic reflective layer is deposited on the side of the light-transmitting layer with a patterned structure layer by vacuum coating. Using high-precision etching equipment, the metal reflective layer on the light-transmitting layer is removed from the metal reflective layer outside the pattern structure according to the groove morphology of the pattern structure, resulting in a pattern structure layer with metal reflection.

5. The optical 3D anti-counterfeiting film as described in claim 2, characterized in that, Printing graphics on a pattern structure layer includes the following methods: The designed graphics are printed onto a patterned layer using printing equipment, resulting in a printing ink layer with monochrome or multicolor graphics.

6. The method for manufacturing an optical 3D anti-counterfeiting film as described in claim 1, characterized in that, The substrate is an acrylic film or a polyethylene terephthalate film with a thickness of 50µm ± 2µm.

7. An optical 3D anti-counterfeiting film, characterized in that, It is manufactured by the method for manufacturing optical 3D anti-counterfeiting film as described in any one of claims 1-6.

8. A method of using an optical 3D anti-counterfeiting film, wherein the optical 3D anti-counterfeiting film is the optical 3D anti-counterfeiting film as described in claim 7, characterized in that, Including the following methods: Remove the release film layer of the optical 3D anti-counterfeiting film and adhere it to the substrate; The composite layer is peeled off, exposing the light-transmitting layer with arrayed convex microlenses on the outer surface.

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