stamping film, transfer film, composite paper, and transfer paper

Abstract

The present application discloses a hot stamping film, a transfer film, a composite paper and a transfer paper. The hot stamping film, the transfer film, the composite paper and the transfer paper all comprise a precision microstructure layer, and the surface of the precision microstructure layer is provided with a precision microstructure; the hot stamping film comprises a base film layer, a precision microstructure layer, a medium layer and a hot melt adhesive layer; the transfer film comprises a base film layer, a precision microstructure layer and a medium layer; the composite paper comprises a base film layer, a precision microstructure layer, a medium layer, a hot melt adhesive layer and a base paper layer; and the transfer paper comprises a precision microstructure layer, a medium layer, a hot melt adhesive layer and a base paper layer. The present application is provided with a precision microstructure, the precision microstructure presents color, three-dimensional relief and dynamic optical effect; the width of the groove is less than 30 microns, and the micro-nano level ink is filled in the groove, which is more delicate and presents a more delicate image. The ink is only filled in the groove, reducing the use of ink; and subsequent printing is not required, reducing the process steps and lowering the cost.

Description

[0001] This invention is a divisional application of application number 202210548852.9, filed on May 20, 2022, entitled "A Precision Microstructure Presenting a Three-Dimensional Relief Image and Its Preparation Method and Application". Technical Field

[0002] This invention relates to the field of precision microstructure design products, and in particular to a hot stamping film, a transfer film, a composite paper, and a transfer paper. Background Technology

[0003] Hot stamping film refers to a technology that combines laser holographic electroplated aluminum film with hot stamping technology to form colorful laser holographic logos and three-dimensional patterns on the surface of printed materials as anti-counterfeiting marks. Transfer film is an intermediate carrier, existing on a transfer paper or plastic base, carrying the printed pattern and used as a layer of chemically elastic film for transfer onto the printed item. Composite paper is a high-end packaging paper in which laser holographic patterns or text signals are loaded onto the surface of aluminized paper through molding. Transfer paper uses a transfer method, with a thin film as the transfer substrate, and undergoes processes such as coating, molding, aluminizing, and lamination to transfer holographic information to the surface of the base paper through an adhesive layer. After the base paper and transfer film are laminated, the transfer substrate can be peeled off.

[0004] In specialized printing applications such as hot stamping films, transfer films, composite papers, and transfer papers, the common method is to transfer ink to the substrate surface using methods like screen printing or gravure printing. In screen printing, varying dot sizes create different shades of color. In gravure printing, the image areas of a precision gravure plate are recessed, with the degree of recess varying according to the image's depth. The blank areas of the precision gravure plate are raised and lie on the same plane. The tonal range of the printed image is determined by the size and depth of the recesses. Deeper recesses hold more ink, resulting in a thicker ink layer on the substrate after printing; conversely, shallower recesses hold less ink, resulting in a thinner ink layer. A precision gravure plate consists of individual recesses corresponding to the original image and their corresponding surfaces.

[0005] Existing gravure printing technology is limited by precision, with the size of the pit dots being larger than 50μm, resulting in low image fineness. Representing the relief effect of the image through the color depth of the ink has limitations and cannot reflect a true three-dimensional effect. Furthermore, since there is only one way to express the effect, the expressive effect is monotonous.

[0006] Therefore, it is necessary to propose an improved solution to overcome the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a hot stamping film, a transfer film, a composite paper, and a transfer paper, respectively. The hot stamping film, transfer film, composite paper, and transfer paper can all present color, dynamic light and shadow, and three-dimensional embossed effects.

[0008] According to one aspect of the present invention, a hot stamping film is provided, comprising, from top to bottom, a base film layer, a precision microstructure layer, a dielectric layer, and a hot melt adhesive layer; the precision microstructure layer has precision microstructures disposed on its surface away from the release layer, the precision microstructures comprising a plurality of micro / nano substructures, the period of the plurality of micro / nano substructures being arranged according to a preset rule to present a three-dimensional relief effect; at least one groove is disposed on the micro / nano substructure, the groove including at least two opposing sidewalls and a bottom, the groove containing ink to present a color effect; the period of the micro / nano substructures is arranged according to a preset rule, including arrangement according to Fresnel law or arrangement according to equal width slicing projection law; the micro / nano substructure may further include at least one inclined surface, the inclined surface being used to reflect light to produce a light and shadow effect; the ratio of the groove width to the period of the micro / nano substructure on each micro / nano substructure is K, and the ratio K is the same for different micro / nano substructures.

[0009] In one embodiment, a release layer is further included, which is disposed between the base film layer and the precision microstructure layer.

[0010] In one embodiment, the ink is a nano-ink, which is partially or fully applied in the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

[0011] In one embodiment, the hot stamping film has positioning color marks located on both sides of the precision microstructure layer, which facilitates the hot stamping process to identify the hot stamping.

[0012] In one embodiment, the dielectric layer is a metallic material or a transparent dielectric, wherein the metallic material is aluminum or chromium, and the transparent dielectric is zinc sulfide or magnesium fluoride;

[0013] The base film layer is a PET film layer.

[0014] According to another aspect of the present invention, a transfer film is provided, comprising a base film layer, a precision microstructure layer, and a dielectric layer arranged sequentially from top to bottom; precision microstructures for forming patterned regions are disposed on the surface of the precision microstructure layer away from the base film layer, the precision microstructures comprising a plurality of micro / nano substructures, the micro / nano substructures having grooves filled with ink; the period of the micro / nano substructures is arranged according to a preset rule, including a Fresnel rule or an equal-width slicing projection rule; the micro / nano substructures may further include at least one inclined surface for reflecting light to produce a light and shadow effect; the ratio of the groove width to the period of the micro / nano substructure on each micro / nano substructure is K, and the ratio K is the same for different micro / nano substructures.

[0015] In one embodiment, the dielectric layer is a metallic material or a transparent dielectric, wherein the metallic material is aluminum or chromium, and the transparent dielectric is zinc sulfide or magnesium fluoride;

[0016] The base film layer is a PET film layer.

[0017] In one embodiment, the ink is a nano-ink, which is partially or fully applied in the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

[0018] According to another aspect of the present invention, a composite paper is provided, comprising, from top to bottom, a base film layer, a precision microstructure layer, a dielectric layer, a hot melt adhesive layer, and a backing paper layer; the precision microstructure layer has precision microstructures for forming patterned areas on its surface away from the base film layer, the precision microstructures comprising a plurality of micro / nano substructures, the micro / nano substructures having grooves filled with ink; the period of the micro / nano substructures is arranged according to a preset rule, including a Fresnel pattern or an equal-width slicing projection pattern; the micro / nano substructure may further include at least one inclined surface for reflecting light to produce a light and shadow effect; the ratio of the groove width to the period of the micro / nano substructure on each micro / nano substructure is K, and the ratio K is the same for different micro / nano substructures.

[0019] In one embodiment, the dielectric layer is a metallic material or a transparent dielectric, wherein the metallic material is aluminum or chromium, and the transparent dielectric is zinc sulfide or magnesium fluoride;

[0020] The base film layer is a PET film layer.

[0021] In one embodiment, the ink is a nano-ink, which is partially or fully applied in the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

[0022] According to another aspect of the present invention, a transfer paper is provided, comprising, from top to bottom, a precision microstructure layer, a dielectric layer, a hot melt adhesive layer, and a backing paper layer; a precision microstructure is disposed on the lower surface of the precision microstructure layer, the precision microstructure comprising a plurality of micro / nano substructures, the micro / nano substructures having grooves filled with ink; the period of the micro / nano substructures is arranged according to a preset rule, including arrangement according to Fresnel law or arrangement according to equal-width slicing projection law; the micro / nano substructure may further include at least one inclined surface, the inclined surface being used to reflect light to produce a light and shadow effect; the ratio of the groove width on each micro / nano substructure to the period of the micro / nano structure is K, and the ratio K is the same for different micro / nano substructures.

[0023] In one embodiment, the dielectric layer is a metallic material or a transparent medium, wherein the metallic material is aluminum or chromium, and the transparent medium is zinc sulfide or magnesium fluoride.

[0024] In one embodiment, the ink is a nano-ink, which is partially or fully applied in the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

[0025] The beneficial effects of this invention include: the hot stamping film, transfer film, composite paper, and transfer paper of this invention are provided with precision microstructures, which present a three-dimensional relief effect; the micro-nano substructures include inclined surfaces, presenting a dynamic optical effect; the precision microstructures are provided with grooves, and ink is filled in the grooves to present a colored effect; different inks are filled in different areas or multiple layers of different inks to present a colorful effect; finally, the three effects of color, dynamic light and shadow, and three-dimensional relief are combined on the precision microstructures; the width of the grooves is less than 30μm, and the filling of the grooves with micro-nano-level inks is more refined, and the presented image is more delicate.

[0026] At the same time, since the ink is only filled in the groove, the amount of ink used is reduced, making it more environmentally friendly; and since no further printing is required, the process steps are reduced, and the cost is lowered.

[0027] In precision microstructures, the arrangement of micro- and nano-substructures according to Fresnel law or equal-width slicing projection law creates a three-dimensional relief effect, thus giving the precision microstructure a three-dimensional relief effect. The micro- and nano-substructures include inclined surfaces, presenting dynamic optical effects. By setting grooves on the precision microstructures and filling the grooves with ink, a colored effect is presented. Different inks are filled in different regions or multiple layers of different inks to present a color effect. Finally, the three effects of color, dynamic light and shadow, and three-dimensional relief are combined on the precision microstructure. The width of the grooves is less than 30μm, and the filling of the grooves with micro- and nano-scale inks is more precise, resulting in a more delicate image.

[0028] A method for fabricating precision microstructures involves setting a structure on a template that is the opposite of the desired micro-precision structure. After transfer, cleaning, and curing, an ultra-precision structure is obtained. Simultaneously, the ink exists only in the grooves of the micro / nano structure, rather than covering the precision microstructure. This method uses less ink, preserving the three-dimensional relief and light and shadow effects of the micro / nano structure while also resulting in more vibrant colors. Furthermore, the washed-out ink can be collected and reused, making it low-carbon and environmentally friendly.

[0029] Another method for preparing precision microstructures involves applying ink to a template using an anilox roller. While transferring the micro / nano structure, the ink is simultaneously filled into the grooves. This method is simpler, uses less ink, and is low-carbon and environmentally friendly. Furthermore, the ink is directionally filled into the grooves, preserving the three-dimensional relief effect and light and shadow effect of the micro / nano structure, while also resulting in more vibrant colors. Attached Figure Description

[0030] Figure 1 A cross-sectional schematic diagram of a precision microstructure provided by the present invention in one embodiment;

[0031] Figure 2 A scanning electron microscope image of one embodiment of the precision microstructure in this invention;

[0032] Figure 3a This is a schematic diagram of an embodiment of the arrangement method of multiple micro / nano substructures in this invention;

[0033] Figure 3b for Figure 3a A schematic cross-sectional view of the multiple micro / nano substructures obtained by the arrangement method shown;

[0034] Figure 4a This is the first example of a form of micro / nano substructure in this invention;

[0035] Figure 4b This is a second example of a form of micro / nano substructure in this invention;

[0036] Figure 4c This is a third example of a form of micro / nano substructure in this invention;

[0037] Figure 4d This is a fourth example of a form of micro / nano substructure in this invention;

[0038] Figure 5a This is the first example of another form of micro / nano substructure in this invention;

[0039] Figure 5b This is a second example of another form of micro / nano substructure in this invention;

[0040] Figure 5c This is a third example of another form of micro / nano substructure in this invention;

[0041] Figure 5d This is a fourth example of another form of micro / nano substructure in this invention; Figure 6 This is another example of a micro / nano substructure in the present invention, wherein the period is S and the groove width is W;

[0042] Figure 7 This is an example of filling different areas with different colored inks in this invention;

[0043] Figure 8 This is a schematic diagram of an embodiment of the precision microstructure including a coating layer in the present invention;

[0044] Figure 9 A cross-sectional schematic diagram of the precision microstructure provided by the present invention in another embodiment;

[0045] Figure 10a This is a schematic diagram of another embodiment of the arrangement method of multiple micro / nano substructures in this invention;

[0046] Figure 10b for Figure 10a A schematic cross-sectional view of the multiple micro / nano substructures obtained by the arrangement method shown;

[0047] Figure 11 This is a schematic diagram of another embodiment of a precision microstructure including a coating layer in this invention;

[0048] Figure 12 An example diagram showing a co-directional stacking of two precision microstructures;

[0049] Figure 13 An example diagram showing a two-layer precision microstructure stacked opposite each other;

[0050] Figure 14 This is a schematic flowchart of one embodiment of a method for preparing a precision microstructure that presents a three-dimensional relief image according to the present invention;

[0051] Figure 15 for Figure 14 A schematic diagram of the preparation method in the diagram;

[0052] Figure 16 This is a schematic flowchart of one embodiment of a method for preparing a precision microstructure that presents a three-dimensional relief image according to the present invention;

[0053] Figure 17 This is a schematic diagram of the preparation system in one embodiment of the present invention;

[0054] Figure 18 This is a schematic diagram of the structure of the hot stamping film shown in this invention;

[0055] Figure 19 for Figure 18 A schematic diagram of the structure of the hot stamping film ink and positioning marks;

[0056] Figure 20 This is a schematic diagram of the transfer membrane structure shown in this invention;

[0057] Figure 21 This is a schematic diagram of the composite paper structure shown in this invention;

[0058] Figure 22 This is a schematic diagram of the structure of the transfer paper shown in this invention;

[0059] Figure 23 This is a schematic diagram of the structure of one embodiment of the anti-counterfeiting card shown in this invention;

[0060] Figure 24 This is a schematic diagram of another embodiment of the anti-counterfeiting card shown in the present invention;

[0061] Figure 25 This is a schematic diagram of the structure of the first embodiment of the decorative texture shown in this invention;

[0062] Figure 26 This is a schematic diagram of the structure of a second embodiment of the decorative texture shown in this invention;

[0063] Figure 27 This is a structural schematic diagram of the third embodiment of the decorative texture shown in this invention;

[0064] Figure 28 This is a schematic diagram of the structure of the fourth embodiment of the decorative texture shown in this invention;

[0065] Figure 29 This is a structural schematic diagram of the fifth embodiment of the decorative texture shown in this invention;

[0066] Figure 30 This is a rendering of the decorative texture shown in one embodiment of the present invention. Detailed Implementation

[0067] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0068] like Figure 1As shown, the precision microstructure 1 includes a plurality of micro-nano substructures 2, and the period of the plurality of micro-nano substructures 2 is arranged according to a preset rule to present a three-dimensional relief effect; at least one groove 3 is provided on the micro-nano substructure 2, the groove includes at least two opposing sidewalls (first sidewall 31 and second sidewall 32) and a bottom 33, and ink 4 is provided in the groove to present a color effect.

[0069] Figure 2 This is a scanning electron microscope image of one embodiment of the present invention. It can be seen that the precision microstructure 1 is a continuous line. In other embodiments, the precision microstructure 1 may also be a discontinuous line.

[0070] like Figure 3a This is one embodiment of the arrangement method of multiple micro / nano substructures 2 in this invention. Taking the final three-dimensional relief effect as a sphere as an example, the height of the spherical model is L. According to Fresnel law, the sphere is divided into layers of equal height, each layer with a height of L1, and projected to obtain continuous ring lines. Each ring line is a micro / nano substructure 2. Multiple micro / nano substructures 2 are arranged on a plane according to Fresnel law to present a three-dimensional relief effect. Figure 3b This is a cross-sectional view of the micro / nano structure 2 in this embodiment. The cross-section of the micro / nano structure in this embodiment is arc-shaped, thus presenting a dynamic light and shadow effect. Grooves 3 are provided on the micro / nano structure 2, and ink 4 is filled in the grooves 3 to present color. Therefore, this precision microstructure presents a colored dynamic light and shadow and three-dimensional relief effect. In other embodiments, it can also be arranged according to the equal width slicing projection law, or other arrangements that can present a three-dimensional relief effect.

[0071] In other embodiments, the three-dimensional relief effect may also present other images, such as three-dimensional images of animals, people, plants, etc., but the present invention is not limited thereto.

[0072] In some embodiments, such as Figures 4a-4d As shown, the micro / nano structure 2 includes an inclined surface that can reflect light, thus creating a dynamic light and shadow effect. Figure 4a The micro / nano substructure 2 contains two inclined surfaces with an arc-shaped cross-section. Figure 4b The micro / nano substructure 2 contains an inclined surface with a triangular cross-section. Figure 4c The micro / nano substructure 2 includes an inclined surface with an arc-shaped cross-section. Figure 4d The micro / nano structure 2 includes an inclined surface with a stepped cross-section; the groove 3 is located in the middle of the inclined surface of the micro / nano structure 2, and the groove 3 is filled with ink. The bottom of the groove 3 is not on the same plane as the bottom of the micro / nano structure 2.

[0073] In other embodiments, such as Figures 5a-5dAs shown, the groove 3 is set at the edge of the inclined surface of the micro-nano structure 2, the groove 3 is filled with ink, and the bottom of the groove 3 is on the same plane as the bottom of the micro-nano structure 2.

[0074] Figures 4a-4d and Figures 5a-5d In the embodiments shown, the width of the grooves 3 on the different micro / nano structures 2 is the same, the width of the grooves 3 ranges from 50nm to 30μm, and the depth of the grooves 3 ranges from 50nm to 50μm; the particle size of the ink is smaller than the width of the grooves 3, and the particle size of the ink ranges from 10nm to 15μm.

[0075] In some embodiments, such as Figure 6 As shown, the period of the micro / nano structure 2 is S, and the width of the groove on the micro / nano structure 2 is W. The period S of different micro / nano structures 2 may be different, but the ratio K of the width W of the groove 3 on different micro / nano structures 2 to the period S of the micro / nano structure 2 is the same.

[0076] In some embodiments, such as Figure 7 As shown, the grooves 3 of different micro / nano structures 2 are filled with different inks. All grooves 3 of all micro / nano structures 2 in region A are filled with the same type of ink, while all grooves 3 of all micro / nano structures 2 in region B are filled with a different type of ink, thus creating a colorful effect. In other embodiments, there can be more regions filled with more different colors.

[0077] In some embodiments, such as Figure 8 As shown, a plurality of micro-nano structures are provided with conformal coating layers 401, and the grooves on the coating layers 401 correspond one-to-one with the grooves on the micro-nano structures 2. The ink 4 fills the grooves on the coating layers.

[0078] like Figure 9 The precision microstructure 1 shown includes a plurality of grooves 3 and a platform region 5 connected thereto. The plurality of grooves 3 are arranged periodically according to a preset pattern to present a three-dimensional relief effect. Each groove 3 includes at least two opposing sidewalls (a first sidewall 31 and a second sidewall 32) and a bottom 33. Ink 4 is disposed within the grooves 3 to present a color effect. The grooves 3 are continuous and / or discontinuous lines; the width W of the grooves 3 ranges from 50 nm to 30 μm, and the depth h of the grooves 3 ranges from 50 nm to 50 μm; the particle size of the ink is smaller than the width of the grooves 3, and the particle size ranges from 10 nm to 15 μm; different grooves 3 have the same width, or for different grooves 3, the ratio of the width W of the groove 3 to the period S of the groove 3 is the same; different grooves 3 can be filled with the same type of ink or different types of ink to present a colored effect.

[0079] In some embodiments, the period of the groove 3 is S, the width of the groove 3 is W, and the ratio of the width W of the groove 3 to the period S of the groove 3 is K. The value of K is the same on different grooves 3.

[0080] like Figure 10a This is an embodiment of a method for arranging a plurality of grooves 3 in a precision microstructure 1 according to the present invention. Taking the final three-dimensional relief effect as a sphere as an example, the height of the sphere is L. According to Fresnel's law, the sphere is divided into layers of equal height, with a layer height of L1, and then projected to obtain continuous annular lines. Each annular line is a groove 3. Figure 10b This is a cross-sectional view of the precision microstructure 1 in this embodiment. The precision microstructure 1 includes a plurality of grooves 3 and a platform area 5 connected thereto. The grooves 3 are filled with ink 4 to present color. Therefore, this precision microstructure presents a colored three-dimensional relief effect. In other embodiments, it can also be arranged according to the equal width slicing projection law or other arrangements that can present a three-dimensional relief effect. In other embodiments, it can also present a three-dimensional relief effect of other images, such as three-dimensional images of animals, people, plants, etc., and the present invention is not limited thereto.

[0081] In some embodiments, such as Figure 11 As shown, a plurality of grooves and platform areas 5 are provided with conformal coating layers 401, and the grooves of the coating layers 401 are filled with ink 4.

[0082] In some embodiments, such as Figure 12 As shown, it includes two layers of precision microstructure 1, which are stacked in the same direction. Different inks are filled in the grooves of the two precision microstructures to present a colored effect. In some other embodiments, it may include more layers of precision microstructure.

[0083] In some embodiments, such as Figure 13 As shown, it includes two layers of precision microstructure 1, which are stacked opposite each other. Different inks are filled in the grooves of the two precision microstructures to create a colored effect. In other embodiments, it may include more layers of precision microstructures, such as... Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0084] When two or more layers of precision microstructures are stacked, at least one intermediary layer may be provided between the layers. The intermediary layer may be a substrate layer, adhesive layer, dielectric layer or coating layer, etc., and is not limited thereto.

[0085] Precision microstructures can be an integral part of a polymer film substrate or a single layer. The materials used for precision microstructures are curable materials such as UV adhesives and thermosetting adhesives.

[0086] A protective layer can also be applied to the precision microstructure to protect it from wear and tear during use.

[0087] Figure 14 This is a schematic flowchart of one embodiment of a method for preparing a precision microstructure that presents a three-dimensional relief image according to the present invention. Figure 15 for Figure 14 A schematic diagram of the preparation method in the image.

[0088] Combination Figure 14 and Figure 15 A method for preparing a precision microstructure that presents a three-dimensional relief image, comprising:

[0089] S1 provides template 110, which has a reverse microstructure;

[0090] S2: Provide a substrate, transfer the reverse microstructure on the template 110 onto the substrate, and cure it;

[0091] S3: Fill the transferred side of the substrate with ink 130;

[0092] S4: Clean one side of the substrate filled with ink to obtain a precision microstructure 1 filled with ink; wherein in S1, the reverse microstructure on the template 110 corresponds to the unevenness of the microstructure to be unfilled with ink, specifically, the raised portion on the reverse corresponds to the groove portion on the microstructure.

[0093] The grooves on the reverse side correspond to the protrusions on the microstructure.

[0094] Figure 15 The reverse microstructure and precision microstructure 1 shown are only illustrative; for the actual structure of precision microstructure 1, please refer to [link to relevant documentation]. Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0095] In one embodiment, between step S2 and step S3, conformal coating is performed to obtain a coating layer, wherein the grooves on the coating layer correspond one-to-one with the grooves on the precision microstructure 1.

[0096] In one embodiment, the entire precision microstructure can be transferred onto the substrate at once, and then one side of the transfer can be filled with an ink to produce a color; in other embodiments, different inks can be filled in different areas to produce a colorful effect.

[0097] In one embodiment, after step S4 (curing), steps S2-S4 can be repeated on either the side where the precision microstructure has been imprinted or the side away from the precision microstructure to transfer the precision microstructure again, fill it with ink, clean the ink, and retain the ink in the grooves of the precision microstructure, thus forming a multilayer precision microstructure. Different inks are filled into different layers to achieve a colored effect.

[0098] In another embodiment, after step S4 (curing), a precision microstructure can be transferred and cured on the side of the substrate away from the precision microstructure. Ink is then filled, the ink is cleaned, and the ink within the grooves of the precision microstructure is retained, forming a double-sided precision microstructure. Different inks are filled on opposite surfaces to achieve a colored effect.

[0099] The substrate is a polymer film coated with UV adhesive, or a UV adhesive layer, thermosetting adhesive, or other curable materials.

[0100] The method for preparing template 110 includes: designing a three-dimensional relief image; preprocessing the image according to Fresnel law or equal height slicing projection to obtain a periodic grayscale image; providing a photoresist stencil, photolithographically etching the periodic grayscale image to obtain a micro / nano structure with an inclined surface on the photoresist stencil, and then photolithographically etching grooves on the micro / nano structure; and replicating the obtained photoresist stencil to obtain template 110.

[0101] In another embodiment, the method for preparing the template 110 includes: designing a three-dimensional relief image; preprocessing the image according to Fresnel law or equal-height slicing projection to obtain a periodic grayscale image; taking a certain width within one period of the periodic grayscale image as the part to be photolithographically etched, and the remaining part within the period as the non-photolithographically etched part, to obtain a periodic binary image; providing a photoresist stencil, photolithographically etching the periodic binary image to obtain grooves on the photoresist stencil; and replicating the obtained photoresist stencil to obtain the template 110.

[0102] Figure 16 This is a schematic flowchart of one embodiment of a method for preparing a precision microstructure that presents a three-dimensional relief image according to the present invention. Figure 17 This is a schematic diagram of the preparation system in the present invention. The preparation system includes an impression roller 210, a template 220, a substrate 230, an anilox roller 240, an ink tank 250, and a curing machine 260.

[0103] Combination Figure 16 and Figure 17 A method for preparing a precision microstructure that presents a three-dimensional relief image, comprising:

[0104] S11: Provides template 220, which has a reverse-printed precision microstructure;

[0105] S21: Apply ink to the stencil 220 using the anilox roller 240;

[0106] S31: Provide a substrate 230, and transfer the reverse precision microstructure with ink attached to the template 220 onto the surface of the substrate 230;

[0107] S41: Curing;

[0108] In S11, the microstructure on the template 220 corresponds to the concave and convex microstructure of the expected unfilled ink. Specifically, the raised part on the reverse corresponds to the groove part on the microstructure, and the groove part on the reverse corresponds to the raised part on the microstructure.

[0109] The template 220 is made of at least one of metal, glass, rubber, plastic, or photosensitive resin, and has intricate microstructures. Figure 15 The template 220 shown above is for illustrative purposes only.

[0110] At least one anilox roller 240 is provided, which applies ink from ink tank 250 to stencil 220.

[0111] The template 220 transfers ink and structure onto the surface of the substrate 230 under the pressure of the impression roller 210.

[0112] The curing machine 260 cures the substrate 230 after transfer printing to obtain a precision microstructure 1 filled with ink.

[0113] Figure 17 The reverse microstructure on template 220 is only illustrative.

[0114] This preparation system is just one of many systems utilized in the method of this invention, and is not limited thereto.

[0115] In one embodiment, between steps S11 and S21, a conformal coating process is further included.

[0116] In other embodiments, steps S11-S41 can be repeated to achieve the positioning and transfer of different inks on a single layer, or the preparation of double-sided precision microstructures, or the preparation of multi-layer precision microstructures, presenting a monochrome or color effect.

[0117] The method for preparing template 220 includes: designing a three-dimensional relief image; preprocessing the image according to Fresnel law or equal height slicing projection to obtain a periodic grayscale image; providing a photoresist stencil, photolithographically etching the periodic grayscale image to obtain a micro / nano structure with an inclined surface on the photoresist stencil, and then photolithographically etching grooves on the micro / nano structure; and replicating the obtained photoresist stencil to obtain template 220.

[0118] In another embodiment, the method for preparing the template 220 includes: designing a three-dimensional relief image; preprocessing the image according to Fresnel law or equal-height slicing projection to obtain a periodic grayscale image; taking a certain width within one period of the periodic grayscale image as the part to be photolithographically etched, and the remaining part within the period as the non-photolithographically etched part, to obtain a periodic binary image; providing a photoresist stencil, photolithographically etching the periodic binary image to obtain grooves on the photoresist stencil; and replicating the obtained photoresist stencil to obtain the template 220.

[0119] According to another aspect of the present invention, the precision microstructure is mainly used in packaging films, packaging paper, decorative textures, clothing, anti-counterfeiting cards, or plastic banknotes, etc. Specific applications of the precision microstructure are described below. Of course, the patterns, materials, thicknesses, or other parameters, including those described above, of the precision structure in different applications can be the same or different.

[0120] Hot stamping film

[0121] Please see Figure 18 , Figure 18 The present invention provides a schematic diagram of the structure of the hot stamping film. The hot stamping film of one embodiment includes a base film layer 6, a release layer 7, a precision microstructure layer 8, a dielectric layer 9, and a hot melt adhesive layer 10 arranged sequentially from top to bottom.

[0122] In one embodiment, a precision microstructure layer 8 is provided on a surface away from the release layer 7. The precision microstructure includes a plurality of micro-nano substructures. The periodic arrangement of the plurality of micro-nano substructures is arranged according to a preset rule to present a three-dimensional relief effect. At least one groove is provided on the micro-nano substructure. The groove includes at least two opposing sidewalls and a bottom. Ink 811 is provided in the groove to present a color effect.

[0123] In another embodiment, a precision microstructure is provided on the precision microstructure layer 8. The precision microstructure includes a plurality of grooves and a platform area connected thereto. The period of the plurality of grooves is arranged according to a preset rule to present a three-dimensional relief effect. The groove includes at least two opposing sidewalls and a bottom. Ink 811 is provided in the groove to present a color effect.

[0124] Preferably, ink 811 is a nano-ink, which is applied partially or fully to the grooves of the micro / nano structure via transfer or gravure printing. The nano-ink particles are smaller than the width of the grooves on the micro / nano structure. Please refer to [link to relevant documentation]. Figure 19 The hot stamping film has positioning color marks 812, which are located on both sides of the precision microstructure layer 8. The positioning color marks 812 facilitate the hot stamping process to identify the hot stamping.

[0125] Figure 18 and Figure 19Layer 8 of the precision microstructure is only schematic; for the actual structure of the precision microstructure, please refer to [link / reference needed]. Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0126] In this embodiment, the dielectric layer 9 is aluminum. However, in other embodiments, it can also be a metallic material such as chromium, or a transparent medium such as zinc sulfide or magnesium fluoride. The base film layer 6 is preferably a PET film layer. The release layer 7 facilitates the peeling of the precision microstructure layer 8 from the base film layer 6. The release layer 7 can be replaced by either the base film layer 6 or the precision microstructure layer 8, which both have a release effect.

[0127] The thicknesses of the base film layer 6, release layer 7, precision microstructure layer 8, and dielectric layer 9 can be selected according to actual conditions. Preferably, the thickness of the base film layer 6 is 12-23 μm, the thickness of the release layer 7 is 1-10 μm, the thickness of the precision microstructure layer 8 is 1-10 μm, and the thickness of the dielectric layer 9 is 10-50 nm.

[0128] One embodiment of the hot stamping film preparation method of this example is as follows: First, a release layer 7 is coated on the base film layer 6 of the PET film layer. Alternatively, the release layer 7 can be omitted, and either the base film layer 6 or the precision microstructure layer 8 with a release effect can be used. Then, a transparent coating is coated on the release layer 7, and multiple micro / nano structures are transferred or gravure-printed and cured. The micro / nano structures have grooves, and nano-ink is positioned and filled in the grooves, or the ink is coated and cleaned so that the nano-ink only fills the grooves. Then, a dielectric layer 9 is vacuum-deposited, which can highlight gradient or embossed effects. Finally, a hot melt adhesive layer 10 is coated to obtain the hot stamping film of this example. The above layers constitute a composite layer of the hot stamping film.

[0129] Another embodiment of the preparation method involves first coating a release layer 7 onto the base film layer 6 of the PET film. Alternatively, a release layer 7 can be omitted, and either a base film layer 6 or a precision microstructure layer 8 with a release effect can be used. Then, a transparent coating is applied to the release layer 7, and multiple grooves and connected platforms are transferred or gravure-printed and cured. Nano-inks are then positioned and filled within the grooves, or the ink is coated and cleaned so that the nano-inks only fill the grooves. Next, a dielectric layer 9 is vacuum-deposited, which can highlight gradient or embossed effects. Finally, a hot melt adhesive layer 10 is coated to obtain the hot stamping film of this embodiment. All the above layers constitute a composite layer of the hot stamping film.

[0130] The hot stamping film production and printing are completed in one step, eliminating the need for two separate steps, which greatly improves production efficiency and saves production costs.

[0131] Transfer membrane

[0132] Please see Figure 20 The transfer film provided in one embodiment of the present invention includes a base film layer 11, a precision microstructure layer 12 and a dielectric layer 13 arranged sequentially from top to bottom. The precision microstructure layer 12 has precision microstructures for forming patterned regions on its surface away from the base film layer 11. The precision microstructures include a plurality of micro-nano substructures, and the micro-nano substructures have grooves filled with ink 122.

[0133] In another embodiment, a precision microstructure layer 12 is provided on a surface away from the base film layer 11, which is used to form a patterned region. The precision microstructure includes a plurality of grooves and platforms, and the grooves are filled with ink 122.

[0134] In this embodiment, a base film layer 11 with release effect or a precision microstructure layer 12 with release effect is used. Figure 20 Layer 12 of the precision microstructure is only schematic; for the actual structure of the precision microstructure, please refer to [link / reference needed]. Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0135] The parameters and preparation methods of the base film layer 11, the precision microstructure layer 12, and the dielectric layer 13 are the same as those of the hot stamping film example, resulting in a transfer film that is a composite layer, which will not be described in detail here.

[0136] Composite paper

[0137] Please see Figure 21 The composite paper provided in one embodiment of the present invention includes a base film layer 14, a precision microstructure layer 15, a dielectric layer 16, a hot melt adhesive layer 17, and a backing paper layer 18 arranged sequentially from top to bottom. The precision microstructure layer 15 has precision microstructures for forming patterned areas on its surface away from the base film layer 14. The precision microstructures include a plurality of micro-nano substructures, and grooves are provided on the micro-nano substructures. The grooves are filled with ink 152.

[0138] In another embodiment, the precision microstructure layer 15 has precision microstructures for forming patterned regions on a surface away from the base film layer 14. The precision microstructures include a plurality of grooves and connected platform regions, and the grooves are filled with ink 152.

[0139] In other embodiments, a base film layer 14 with a release effect or a precision microstructure layer 15 with a release effect can be used. The parameters and preparation methods of the base film layer 14, precision microstructure layer 15, and dielectric layer 16 are the same as those in the hot stamping film embodiment, and will not be repeated here. After the base film layer 14, precision microstructure layer 15, and dielectric layer 16 are prepared, they are laminated with a roll of white cardstock (base paper layer 18) coated with adhesive (hot melt adhesive layer 17) to obtain the composite paper of this embodiment. The above layers constitute the composite layer of the composite paper. Figure 21 The precision microstructures on layer 15 are only schematic; for the actual structure of the precision microstructures, please refer to [link / reference]. Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0140] transfer paper

[0141] Please see Figure 22 The present invention provides a transfer paper comprising, from top to bottom, a precision microstructure layer 19, a dielectric layer 20, a hot melt adhesive layer 21, and a backing paper layer 22. The lower surface of the precision microstructure layer 19 is provided with precision microstructures, which include a plurality of micro-nano substructures. The micro-nano substructures are provided with grooves, and the grooves are filled with ink 192.

[0142] In another embodiment, a precision microstructure is provided on the lower surface of the precision microstructure layer 19. The precision microstructure includes a plurality of grooves and platform areas, and the grooves are filled with ink 192.

[0143] In other embodiments, a precision microstructure layer 19 with release effect may also be used. The parameters and preparation methods of the precision microstructure layer 19 and the dielectric layer 20 are the same as those of the hot stamping film embodiment, and the preparation methods of the hot melt adhesive layer 21 and the backing paper layer 22 are the same as those of the composite paper embodiment, and will not be described in detail here. Figure 20 Layer 19 of the precision microstructure is only schematic; for the actual structure of the precision microstructure, please refer to [link / reference needed]. Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0144] In summary: The hot stamping film, transfer film, composite paper, and transfer paper are incorporating precise microstructures, which create a three-dimensional embossed effect. Micro-nano substructures, including inclined surfaces, exhibit dynamic optical effects. Grooves on these precise microstructures, filled with ink, create colored effects. Different inks are applied to specific areas, or multiple layers of different inks are used to create a colorful effect. Ultimately, color, dynamic light and shadow, and three-dimensional embossing effects are combined on the precise microstructures. The grooves are less than 30μm wide, and the filling of these grooves with micro-nano-level inks results in greater precision and a more detailed image.

[0145] At the same time, since the ink is only filled in the groove, the amount of ink used is reduced, making it more environmentally friendly; and since no further printing is required, the process steps are reduced, and the cost is lowered.

[0146] Anti-counterfeit certificate card

[0147] Please see Figure 23-24The multi-color three-dimensional dynamic image annotation-enabled anti-counterfeiting card provided by the present invention includes a base layer, a first annotation layer disposed on one side of the base layer, a first composite layer disposed on the first annotation layer, a second annotation layer disposed on the other side of the base layer, and a second composite layer disposed on the second annotation layer.

[0148] In one embodiment, such as Figure 23 As shown, the anti-counterfeiting card includes a first composite layer 23, a first endorsement layer 24, a base layer 25, a second endorsement layer 26, and a second composite layer 27 stacked sequentially from top to bottom. The first composite layer 23 includes a first base film layer 231, a first microstructure layer 232, a first coating layer 233, and a first protective layer 234 stacked sequentially, with the first base film layer 231 disposed on top of the first endorsement layer 24. The first microstructure layer 232 has precision microstructures, each comprising a plurality of micro-nano substructures, with grooves on the micro-nano substructures filled with ink of at least one color; or the precision microstructure includes a plurality of grooves and a platform area, with the grooves filled with ink of at least one color. The second composite layer 27 includes a second base film layer 271 and a second protective layer 272 stacked sequentially, with the second endorsement layer 26 disposed on top of the second base film layer 271 and located between the base layer 25 and the second base film layer 271.

[0149] In another embodiment, such as Figure 24 As shown, with Figure 23 The difference in the illustrated embodiment lies in the second composite layer 27, which includes a second base film layer 271, a second microstructure layer 273, a second coating layer 274, and a second protective layer 272 arranged sequentially. The second microstructure layer 273 has precision microstructures, each comprising a plurality of micro / nano substructures, with grooves on each substructure filled with ink of at least one color; or the precision microstructure includes a plurality of grooves and a plateau region, with the grooves filled with ink of at least one color.

[0150] Figure 23 , Figure 24 The first microstructure layer 232 and the second microstructure layer 273 are only schematic; the actual structure of the precision microstructures on the first microstructure layer 232 and the second microstructure layer 273 can be found in [reference needed]. Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0151] In the embodiment of the anti-counterfeiting card, the materials of the first microstructure layer and the second microstructure layer are resins, which are coated on the base film layer. The precision microstructure is preferably a resin with good adhesion to the base film layer. More preferably, the precision microstructure is a UV-curable resin layer, which is beneficial to prevent deformation during heating and pressurizing lamination.

[0152] In an embodiment of an anti-counterfeiting card, the base layer comprises one or more thin film layers. The base layer is preferably made of PC film or PET film, and a chip may also be disposed within the base layer. The first base film layer is preferably a PC base film or a modified PET base film layer, and the second base film layer is preferably a PC base film or a modified PET base film layer. The first endorsement layer is made of PC film or a modified PET film, and the second endorsement layer is made of PC film or a modified PET film. Multiple images and / or graphic text are disposed on the first and / or second endorsement layers, supporting real-time endorsement of multiple images and graphic text. The graphic text includes one or more of the following: 3D portrait, 3D graphics, images with different positions, dynamically floating and sinking text graphics, and QR codes. The first coating layer is an opaque metal layer or a transparent dielectric layer, used to protect and enhance the brightness of the first microstructure layer. The opaque metal layer is made of one or more of chromium, aluminum, and copper, and the transparent dielectric layer is made of one or more of zinc sulfide, titanium dioxide, and magnesium fluoride. The second coating layer is either an opaque metal layer or a transparent dielectric layer. This second coating layer protects the second microstructure layer and enhances its brightness. The opaque metal layer is made of one or more of chromium, aluminum, and copper, while the transparent dielectric layer is made of one or more of zinc sulfide, titanium dioxide, and magnesium fluoride. The first protective layer is preferably bonded to the first coating layer. The first protective layer is preferably a resin layer with good adhesion to the first coating layer, giving the anti-counterfeiting card oil resistance, fingerprint resistance, and scratch resistance.

[0153] In one embodiment, the method for preparing the anti-counterfeiting card includes:

[0154] Step 1: Preparation of the first composite layer. Specifically, firstly, a resin layer (UV-curable resin layer) is coated on one side of the first base film layer 231. Then, a first microstructure layer 232 is formed on the resin layer by transfer or gravure printing. The first microstructure layer 232 has precision microstructures, including a plurality of micro / nano substructures, with grooves formed on the micro / nano substructures. These grooves are filled with ink. Alternatively, the precision microstructures on the first microstructure layer 232 include a plurality of grooves and plateau regions, and the grooves are filled with ink. A first coating layer 233 is formed on the first microstructure layer 232 by vacuum deposition. Finally, a first protective layer 234 is coated on the first coating layer 233 to obtain the first composite layer.

[0155] Step 2: Prepare the second composite layer.

[0156] The preparation of the second composite layer includes coating a second protective layer 272 onto the second base film layer 271.

[0157] Alternatively, a resin layer is coated on the second base film layer 271, and a second microstructure layer 273 is formed by transfer or gravure printing on the resin layer. The precision microstructure on the second microstructure layer 273 includes a plurality of micro-nano substructures, and grooves are provided on the micro-nano substructures. The grooves are filled with ink. Alternatively, the precision microstructure on the second microstructure layer 273 includes a plurality of grooves and plateau regions, and the grooves are filled with ink. Then, a second coating layer 274 is formed by vacuum deposition on the second microstructure layer 273, and a second protective layer 272 is formed by coating the second coating layer 274 to obtain the second composite layer 27.

[0158] Step 3: Heat-laminate the first composite layer 23, the first labeling layer 24, the base layer 25, the second labeling layer 26, and the second composite layer 27. The first base film layer 231 in the first composite layer 23 is disposed on the first labeling layer 24, and the second labeling layer 26 is disposed on the second base film layer 271 in the second composite layer 27.

[0159] It may also include step 4: signing the image on the first endorsement layer 24 and the second endorsement layer 26 as needed in real time.

[0160] Step 4 is not required and may be omitted in other embodiments.

[0161] The texture of the anti-counterfeiting card is achieved through precision photolithography, resulting in dynamic, embossed, and highly glossy multi-color three-dimensional dynamic image effects, providing excellent anti-counterfeiting performance. The double-sided design features a tightly packed, precise microstructure for enhanced anti-counterfeiting, further improving its effectiveness and visual appeal. The first composite layer 23, first endorsement layer 24, base layer 25, second endorsement layer 26, and second composite layer 27 are integrally laminated, resulting in a simple and stable process and superior quality anti-counterfeiting card.

[0162] The multi-color three-dimensional dynamic image of the anti-counterfeiting card in this embodiment is achieved through an ultra-precision micro-gravure printing method. The method and precision of ultra-precision micro-gravure printing are significantly different from existing gravure printing. The precision of existing gravure printing is generally around 50µm, while the precision of ultra-precision micro-gravure printing technology is in the range of 5-50µm, with a large controllable range. The texture on the image can achieve dynamic, embossed, and highly glossy effects through precision photolithography. The manufacturing method of this embodiment is to coat a flexible film (i.e., the base film layer) with UV resin adhesive, and use a template with a precision microstructure to imprint 5-50µm deep grooves on the surface of the UV resin adhesive. Color ink is filled into the grooves by scraping or coating, and the ink on the raised parts is washed away, so that the micro-nano structure displays color. Color and special effects are presented simultaneously, which is fundamentally different from ordinary gravure printing. The anti-counterfeiting card made using this technology has a better anti-counterfeiting effect, better performance, and superior quality.

[0163] Decorative textures

[0164] Decorative textures can be applied to home appliances, mobile phone back panels, cosmetic top covers, or car trim.

[0165] Please see Figure 25-29 , Figure 25-29 The diagram shows a structural schematic of different embodiments of the decorative texture provided by the present invention. The decorative texture provided by the present invention includes a base layer and at least one composite layer disposed on the base layer, wherein the at least one composite layer includes a precision microstructure.

[0166] like Figure 25 As shown, the present invention provides a decorative texture structure in the first embodiment. The decorative texture structure includes a base layer 40, a first adhesive layer 41, and a first composite layer 42 arranged sequentially from top to bottom. The first composite layer 42 includes a first thin film layer 421 and a first microstructure layer 422. The first thin film layer 421 is fixedly disposed on the base layer 40 by the first adhesive layer 41. The first microstructure 422 is provided with a precision microstructure, including a first precision microstructure main layer 4221, a first coating layer 4222, and a first ink layer 4223. A plurality of micro-nano substructures are provided on a precision microstructure main layer 4221, and grooves are provided on the micro-nano substructures, or a plurality of grooves and platform areas are provided on the first precision microstructure main layer 4221; the first coating layer 4222 is a conformal structure that imitates the surface shape of the precision microstructure main layer 4221, and grooves are provided on the first coating layer 4222. The grooves on the first coating layer 4222 correspond one-to-one with the grooves on the first precision microstructure main layer 4221, and ink is filled in the grooves of the first coating layer 4222.

[0167] like Figure 26 As shown, the present invention provides a decorative texture structure according to a second embodiment, the decorative texture structure comprising, from top to bottom, a base layer 40, a first adhesive layer 41, a first composite layer 42, a second adhesive layer 43, and a second composite layer 44. The base layer 40, the first adhesive layer 41, and the first composite layer 42 are connected to... Figure 25 The embodiment shown is the same. The second composite layer 44 includes a second thin film layer 441 and a second microstructure layer 442 disposed sequentially from top to bottom. The second thin film layer 441 is fixedly disposed on the first composite layer 42 by a second adhesive layer 43. The second microstructure layer 442 is provided with precision microstructures or other microstructures, such as laser micro / nano structures, silver micro / nano structures, etc., and is not limited thereto. Taking the second micro / nano structure layer 442 as an example, it includes a second precision microstructure main layer 4421, a second coating layer 4422, and a second ink layer 4423. The second coating layer 4422 is a conformal structure that imitates the surface shape of the second precision microstructure main layer 4421. The grooves of the second coating layer 4422 correspond one-to-one with the grooves of the second precision microstructure main layer 4421. The second ink layer 4423 fills the grooves on the second coating layer 4422.

[0168] like Figure 27 As shown, the present invention provides a decorative texture structure according to a third embodiment. The decorative texture structure includes a base layer 40, a first adhesive layer 41, a first composite layer 42, and a screen printing layer 45 arranged sequentially from top to bottom. The first composite layer 42 includes a first thin film layer 421, a first microstructure layer 422, and a first coating layer 423 arranged sequentially from top to bottom. The first microstructure layer 422 is provided with a precision microstructure, which includes a plurality of micro-nano substructures. The micro-nano substructures are provided with grooves, and the grooves are filled with ink. The first thin film layer 421 is fixedly disposed on the base layer 40 by the first adhesive layer 41, and the screen printing layer 45 is disposed on the first coating layer 423.

[0169] like Figure 28 As shown, the present invention provides a decorative texture structure according to a fourth embodiment. The decorative texture structure includes, from top to bottom, a base layer 40, a first adhesive layer 41, a first composite layer 42, a second adhesive layer 43, and a second composite layer 44. The base layer 40, the first adhesive layer 41, the first composite layer 42, and... Figure 27 The embodiment shown is the same. The second composite layer includes a second thin film layer 441 and a second microstructure layer 442 arranged sequentially from top to bottom. The second microstructure layer 442 is provided with precision microstructures or other microstructures, such as laser micro-nano structures, silver micro-nano structures, etc., and is not limited thereto. The following example uses a second microstructure layer 442 with a precision microstructure, which includes a second precision microstructure main layer 4421, a second coating layer 4422, and a second ink layer 4423. The second precision microstructure main layer 4421 has a plurality of micro-nano substructures, and the micro-nano substructures have grooves, or the second precision microstructure main layer 4421 has a plurality of grooves and platform areas. The second coating layer 4422 is a conformal structure that imitates the surface shape of the second precision microstructure main layer 4421. The grooves on the second coating layer 4422 correspond one-to-one with the grooves on the second precision microstructure main layer 4421. The second ink layer 4423 fills the grooves on the second coating layer 4422. The second thin film layer 441 is fixedly disposed on the first composite layer 42 by the second adhesive layer 43.

[0170] like Figure 29As shown, the present invention provides a decorative texture structure according to a fifth embodiment. The decorative texture structure includes a base layer 40, a first adhesive layer 41, a first composite layer 42, and a second composite layer arranged sequentially from top to bottom. The first composite layer 42 includes a first thin film layer 421 and a first microstructure layer 422. The first microstructure layer 422 is provided with precision microstructures, including a first precision microstructure main layer 4221, a first coating layer 4222, and a first ink layer 4223. The first precision microstructure main layer 4221 is provided with a plurality of micro / nano substructures, and the micro / nano substructures are provided with grooves, or the first precision microstructure main layer 4221 is provided with a plurality of grooves and a platform area. The first coating layer 4222 is a conformal structure that imitates the surface shape of the precision microstructure main layer 4221. The first coating layer 4222 is provided with grooves, and the grooves on the first coating layer 4222 correspond one-to-one with the grooves on the first precision microstructure main layer 4221. The ink is filled in the grooves of the first coating layer 4222. The second composite layer is provided with precision microstructures or other micro / nano structures, such as laser micro / nano structures, silver micro / nano structures, etc., and is not limited thereto. Taking a laser micro / nano structure as an example, the second composite layer only includes a second microstructure layer 442', which includes a second micro / nano structure main layer 4421', a second coating layer 4422', and a second ink layer 4423'; the second coating layer 4422' is a conformal structure that imitates the surface shape of the second micro / nano structure main layer 4421', and the grooves on the second coating layer 4422' correspond one-to-one with the grooves of the micro / nano structure on the second micro / nano structure main layer 4421'. The second ink layer 4423' fills the grooves on the second coating layer 4422', and the second micro / nano structure main layer 4421' is disposed on the first composite layer 42.

[0171] Figures 25-29 The first microstructure layer 422 and the second microstructure layers 442 and 442' are only schematic. The first microstructure layer 422 and the second microstructure layers 442 and 442' have intricate microstructures. For the actual structure, please refer to [reference needed]. Figures 4a-4d , Figures 5a-5d and Figure 9 However, this is not the limit.

[0172] Figures 25-29In the embodiments, the substrate is a transparent and flat glass or composite board; the first adhesive layer and the second adhesive layer are OCA optical adhesive layers; the first thin film layer and the second thin film layer are PET films with a thickness range of 25μm-200μm, preferably 50μm-100μm; the first microstructure layer and the second microstructure layer are UV adhesive layers; the first ink layer is nano-ink, which is filled into the grooves of the micro-nano structure by scraping with a metal doctor blade; the second ink layer is nano-ink, which is made by screen printing process, with a thickness range of 10μm-15μm, and the second ink layer is white ink or black ink, which can achieve the function of covering the substrate. The first and second coating layers are made of materials such as brightening film, antireflection film, SiO2, and indium, with a thickness ranging from 80nm to 260nm, preferably 140nm, to achieve the functions of brightening, antireflection, and medium color. The first and second coating layers are prepared by vapor deposition or vacuum sputtering processes. The screen printing layer is an ink layer, made by screen printing process, with a thickness ranging from 10μm to 15μm. The screen printing layer is white or black ink, which can achieve the function of covering the substrate.

[0173] The decorative texture of this invention is achieved by transferring micro-nano textures onto a substrate using micro-nano photolithography. By creating precise microstructures on the substrate, a three-dimensional, light and shadow, and colorful effect is achieved. It is softer and more visually comfortable than traditional gradient colors, and can also possess a shimmering effect. It can produce a wider variety of effects and has a broader range of applications, such as mobile phone decorations, automotive interiors, cosmetic lids, and surface textures for home appliances. It solves the problem of existing technologies having relatively monotonous pattern colors, only able to achieve gradient effects with superimposed 2-3 colors, and unable to achieve multi-color variations. Figure 30 This is a rendering of one implementation method, showing that the prepared decorative texture presents the effect of ink painting.

[0174] The same layer name in different products or embodiments does not necessarily mean that their material, composition, thickness, pattern, or other related parameters are the same. They may be the same or different, and can be selected or manufactured according to actual needs. The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0175] In the accompanying drawings, the dimensions and relative dimensions of layers and regions are exaggerated for clarity. It should be understood that when an element, such as a layer, region, or substrate, is referred to as "formed on," "disposed on," or "located on" another element, the element may be directly disposed on said other element, or there may be intermediate elements present. Conversely, when an element is referred to as "directly formed on" or "directly disposed on" another element, there are no intermediate elements.

[0176] In this document, the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," "outer," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used for the clarity of expressing the technical solution and for the convenience of description, and therefore should not be construed as limiting the present invention.

[0177] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0178] In this document, the terms “including,” “comprising,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0179] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A hot stamping film, characterized in that, The system comprises, from top to bottom, a base film layer, a precision microstructure layer, a dielectric layer, and a hot melt adhesive layer. The precision microstructure layer has precision microstructures on its surface away from the release layer. Each precision microstructure includes a plurality of micro / nano substructures, arranged periodically according to a predetermined pattern to create a three-dimensional relief effect. Each micro / nano substructure has at least one groove, containing at least two opposing sidewalls and a bottom. Ink is placed within the groove to create a color effect. The periodicity of the micro / nano substructures follows a predetermined Fresnel pattern. Each micro / nano substructure also includes at least one inclined surface for reflecting light and creating a light and shadow effect. The ratio of the groove width to the periodicity of each micro / nano substructure is K, and the ratio K is the same for different micro / nano substructures.

2. The hot stamping film as described in claim 1, characterized in that, It also includes a release layer disposed between the base film layer and the precision microstructure layer.

3. The hot stamping film as described in claim 1 or 2, characterized in that, The ink is a nano-ink, which is applied partially or fully to the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

4. The hot stamping film as described in claim 1 or 2, characterized in that, The hot stamping film has positioning color marks, which are located on both sides of the precision microstructure layer. The positioning color marks facilitate the identification of hot stamping during the hot stamping process.

5. The hot stamping film as described in claim 1 or 2, characterized in that, The dielectric layer is a metallic material or a transparent medium, wherein the metallic material is aluminum or chromium, and the transparent medium is zinc sulfide or magnesium fluoride; The base film layer is a PET film layer.

6. A transfer membrane, characterized in that, The system comprises, from top to bottom, a base film layer, a precision microstructure layer, and a dielectric layer. On the surface of the precision microstructure layer, away from the base film layer, precision microstructures are formed to create patterned regions. Each precision microstructure includes a plurality of micro / nano substructures, each substructure having grooves filled with ink. The period of each micro / nano substructure is arranged according to a preset Fresnel law. Each micro / nano substructure also includes at least one inclined surface for reflecting light and creating a light and shadow effect. The ratio of the groove width to the period of each micro / nano substructure is K, and the ratio K is the same for different micro / nano substructures.

7. The transfer membrane as described in claim 6, characterized in that, The dielectric layer is a metallic material or a transparent medium, wherein the metallic material is aluminum or chromium, and the transparent medium is zinc sulfide or magnesium fluoride; The base film layer is a PET film layer.

8. The transfer membrane as described in claim 6, characterized in that, The ink is a nano-ink, which is applied partially or fully to the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

9. A composite paper, characterized in that, The system comprises, from top to bottom, a base film layer, a precision microstructure layer, a dielectric layer, a hot melt adhesive layer, and a backing paper layer. The precision microstructure layer has precision microstructures on its surface away from the base film layer, used to form graphic regions. Each precision microstructure includes a plurality of micro / nano substructures, each substructure having grooves filled with ink. The period of each micro / nano substructure is arranged according to a preset Fresnel law. Each micro / nano substructure also includes at least one inclined surface for reflecting light and creating a light and shadow effect. The ratio of the groove width to the period of each micro / nano substructure is K, and the ratio K is the same for different micro / nano substructures.

10. The composite paper as described in claim 9, characterized in that, The dielectric layer is a metallic material or a transparent medium, wherein the metallic material is aluminum or chromium, and the transparent medium is zinc sulfide or magnesium fluoride; The base film layer is a PET film layer.

11. The composite paper as described in claim 9, characterized in that, The ink is a nano-ink, which is applied partially or fully to the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

12. A transfer paper, characterized in that, The material comprises, from top to bottom, a precision microstructure layer, a dielectric layer, a hot melt adhesive layer, and a backing paper layer. A precision microstructure is disposed on the lower surface of the precision microstructure layer. Each precision microstructure includes a plurality of micro / nano substructures, each substructure having grooves filled with ink. The period of each micro / nano substructure is arranged according to a preset Fresnel law. Each micro / nano substructure also includes at least one inclined surface used to reflect light, producing a light and shadow effect. The ratio of the groove width to the period of each micro / nano substructure is K, and the ratio K is the same for different micro / nano substructures.

13. The transfer paper as described in claim 12, characterized in that, The dielectric layer is a metallic material or a transparent medium, wherein the metallic material is aluminum or chromium, and the transparent medium is zinc sulfide or magnesium fluoride.

14. The transfer paper as described in claim 12, characterized in that, The ink is a nano-ink, which is applied partially or fully to the grooves of the micro-nano structure by means of transfer or gravure printing. The size of the nano-ink particles is smaller than the width of the grooves on the micro-nano structure.

Images