Digital gold stamping packaging film and production method thereof

Abstract

The invention is suitable for the technical field of gold stamping packaging bag manufacturing, and particularly relates to a digital gold stamping packaging film and a production method thereof. UV glue is positioned and sprayed on the bottom plate to form a first area; printing a gold stamping film on the first area; printing a pattern layer on the gold stamping film; coating a transparent filling layer on the remaining area of the gold stamping film in a positioned manner; printing a protective layer; heating to a first temperature and maintaining for a first duration, then cooling to room temperature, and curing the transparent filling layer to obtain a finished product of the digital gold stamping packaging film. According to the method, a large gilding film is printed on a bottom plate, then patterns are printed on partial areas of the gilding film, then a transparent filling layer is printed on the exposed surface of the gilding film, then a protective layer is printed, finally, the temperature is increased to enable the transparent filling layer to flow, and cooling and curing are conducted, so that gilding has the stereoscopic impression, and the gilding effect is good. And no gap exists between the gold stamping and the pattern, and the problem that an existing digital gold stamping packaging film production method cannot give consideration to stereoscopic impression and product quality at the same time can be solved.

Description

Technical Field

[0001] This application belongs to the field of hot stamping packaging bag manufacturing technology, and particularly relates to digital hot stamping packaging film and its production method. Background Technology

[0002] Digital hot stamping, also known as digital foil stamping, is a hot stamping process that does not require a mold. It involves spraying UV adhesive or other adhesives onto a base plate to bond the hot stamping film, replacing the hot or cold pressing steps of traditional hot stamping processes. The design is then printed on the hot stamping film, creating a design with hot stamping edges. Hot stamping enhances the three-dimensional effect and texture. When hot stamping technology is applied to packaging films, the base plate is typically aluminum foil.

[0003] Existing digital hot stamping packaging film production methods often compromise between three-dimensionality and product quality. A common method involves applying adhesive to a base plate, hot stamping, and then printing the design on top, partially obscuring the hot stamping. While this eliminates gaps between the design and the hot stamping due to errors, it results in the hot stamping layer being lower than the design layer, leading to a poor three-dimensional effect. Some improved methods involve spraying adhesive of varying thicknesses onto the base plate or pressing it to create an embossed effect. Essentially, these methods create a height difference in the hardware, printing the hot stamping film higher and the design lower. While this increases the three-dimensionality, the original process of printing the hot stamping film first and then the design becomes printing the design first, creating the height difference, and finally printing the hot stamping film. This not only increases processing complexity but also increases the risk of gaps (where the gap is neither the design nor the hot stamping) between the design and the hot stamping surface due to printing errors, reducing product quality. Therefore, existing digital hot stamping packaging film production methods cannot simultaneously achieve both three-dimensionality and product quality. Summary of the Invention

[0004] This application provides a digital hot stamping packaging film and its production method, which can solve the problem that existing digital hot stamping packaging film production methods cannot simultaneously achieve a three-dimensional effect and product quality.

[0005] In a first aspect, embodiments of this application provide a method for producing digital hot stamping packaging film, comprising: Provide base plate; A first area is formed by spraying UV adhesive onto the base plate. A hot stamping film is printed on the first area; wherein the area of ​​the hot stamping film is equal to the area of ​​the first area; A pattern layer is printed on the hot stamping film; wherein the area of ​​the pattern layer is smaller than the area of ​​the hot stamping film. A transparent filler layer is applied to the remaining area of ​​the hot stamping film; the thickness of the transparent filler layer is greater than the thickness of the pattern layer. Printed protective layer; The product is heated to a first temperature and maintained for a first time, then cooled to room temperature and cured to obtain the digital hot stamping packaging film; wherein the first temperature is lower than the melting point of the other structures in the digital hot stamping packaging film except for the transparent filler layer.

[0006] The technical solutions described in this application embodiment have at least the following technical effects: The digital hot stamping packaging film production method provided in this application includes the following steps: First, a base plate is provided. Next, a first area is formed by spraying UV adhesive onto the base plate. This first area is the region on the packaging film where the image design (including hot stamping and patterns) is located. Then, hot stamping film is printed onto the first area and cured, resulting in a fully covered area. Next, a pattern layer is printed onto the hot stamping film. This pattern layer is printed on a portion of the hot stamping film surface, with the area of ​​the pattern layer being smaller than the area of ​​the hot stamping film. Subsequently, a transparent filler layer is applied to the remaining area of ​​the hot stamping film. This transparent filler layer is thicker than the pattern layer and has a melting point lower than the melting point of other structures in the digital hot stamping packaging film besides the transparent filler layer. Finally, a protective layer is printed, covering the entire surface. Finally, the film is heated to a first temperature and maintained for a first duration, then cooled to room temperature and cured to obtain the finished digital hot stamping packaging film. In this step, the packaging film is heated so that the transparent filler layer flows while other structures do not melt or deform. After the transparent filler layer melts, it naturally forms a convex mirror shape under the constraint of the protective layer. Then, it is cooled to room temperature and cured to maintain the convex mirror shape. The convex mirror not only makes the hot stamping more three-dimensional, but also prevents gaps between the hot stamping film and the pattern due to printing errors, thus solving the problems of existing methods. In this method, a large sheet of hot stamping film is first printed on the base plate. Then, a pattern is printed on a portion of the hot stamping film, making the hot stamping and the pattern appear to fit tightly without any gaps. Subsequently, a transparent filler layer is printed on the exposed surface of the hot stamping film. Following this, a protective layer is printed. Finally, the transparent filler layer is heated to flow, and then cooled and cured, allowing it to naturally form a convex mirror shape under the constraint of the protective layer. This gives the hot stamping a three-dimensional effect, and there are no gaps between the hot stamping and the pattern. This method solves the problem of existing digital hot stamping packaging film production methods being unable to balance three-dimensionality and product quality.

[0007] Secondly, embodiments of this application provide a digital hot stamping packaging film, which is manufactured by the digital hot stamping packaging film production method described in any one of the first aspects.

[0008] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic flowchart of a digital hot stamping packaging film production method provided in an embodiment of this application; Figure 2 This is a cross-sectional view of the finished digital hot stamping packaging film provided in one embodiment of this application; Figure 3 This is a cross-sectional view of the finished digital hot stamping packaging film provided in another embodiment of this application; Figure 4 This is a schematic diagram of the structure of the digital hot stamping packaging film production equipment provided in the embodiments of this application.

[0011] The following are the labeling elements in the figure: 1. Base plate; 2. UV adhesive layer; 3. Hot stamping film; 4. Pattern layer; 5. Transparent filler layer; 6. Protective layer; 11. First adhesive column. Detailed Implementation

[0012] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0013] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0014] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0015] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0016] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0018] In related technologies, existing digital hot stamping packaging film production methods often involve a trade-off between three-dimensionality and product quality. A common method involves applying adhesive to a base plate, hot stamping, and then printing the design on top of the hot stamping, partially obscuring the hot stamping. This method eliminates gaps caused by errors between the design and the hot stamping, but results in the hot stamping layer being lower than the design layer, leading to a poor three-dimensional effect. Some improved methods involve spraying adhesive of varying thicknesses onto the base plate or pressing the base plate to create an embossed effect. Essentially, these methods create a difference in hardware height, allowing the hot stamping to be printed at a higher position. While printing the gold foil at a lower level can enhance the three-dimensional effect by placing the hot stamping at a higher position, the original process of printing the hot stamping foil first and then printing the pattern on it has been changed to printing the pattern first, creating the height difference, and then printing the hot stamping foil. This not only increases the processing complexity but may also lead to gaps (where the gap is neither the pattern nor the hot stamping) at the junction of the pattern and the hot stamping surface due to printing errors, thus reducing product quality. Therefore, the existing digital hot stamping packaging film production method has the problem of not being able to achieve both a three-dimensional effect and product quality.

[0019] To address the aforementioned problems, this application provides a method for producing digital hot stamping packaging film. The method involves: first, providing a base plate; second, positioning and spraying UV adhesive on the base plate to form a first area, which is the area on the packaging film containing the image design (including hot stamping and patterns). Then, printing hot stamping film onto the first area, allowing the film to cure and cover the entire area. Next, printing a pattern layer onto the hot stamping film, printing the pattern layer on a portion of the film surface, ensuring the pattern layer's area is smaller than the hot stamping film's area. Subsequently, applying a transparent filler layer to the remaining area of ​​the hot stamping film, where the thickness of the transparent filler layer is greater than the pattern layer's thickness, and the melting point of the transparent filler layer is lower than the melting point of other structures in the digital hot stamping packaging film besides the transparent filler layer. Finally, printing a protective layer covering the entire surface. Finally, the film is heated to a first temperature and maintained for a first duration, then cooled to room temperature and cured to obtain the finished digital hot stamping packaging film. In this step, the packaging film is heated so that the transparent filler layer flows while other structures do not melt or deform. After the transparent filler layer melts, it naturally forms a convex mirror shape under the constraint of the protective layer. Then, it is cooled to room temperature and cured to maintain the convex mirror shape. The convex mirror not only makes the hot stamping more three-dimensional, but also prevents gaps between the hot stamping film and the pattern due to printing errors, thus solving the problems of existing methods. In this method, a large sheet of hot stamping film is first printed on the base plate. Then, a pattern is printed on a portion of the hot stamping film, making the hot stamping and the pattern appear to fit tightly without any gaps. Subsequently, a transparent filler layer is printed on the exposed surface of the hot stamping film. Following this, a protective layer is printed. Finally, the transparent filler layer is heated to flow, and then cooled and cured, allowing it to naturally form a convex mirror shape under the constraint of the protective layer. This gives the hot stamping a three-dimensional effect, and there are no gaps between the hot stamping and the pattern. This method solves the problem of existing digital hot stamping packaging film production methods being unable to balance three-dimensionality and product quality.

[0020] The digital hot stamping packaging film production method provided in this application embodiment can be applied to digital hot stamping packaging film production equipment. In this case, the digital hot stamping packaging film production equipment is the execution subject of the digital hot stamping packaging film production method provided in this application embodiment. This application embodiment does not impose any restrictions on the specific type of digital hot stamping packaging film production equipment.

[0021] Digital hot stamping packaging film production equipment includes a conveying device, a glue spraying device, a printing device, a curing device, a heating device, and a control device. The control device is communicatively connected to the other devices. The conveying device can be a conveyor belt; the glue spraying device can include a dispensing machine, a squeegee, and a spraying device; the printing device can be a printing press; the curing device can be an ultraviolet emitter; and the heating device can be various devices that generate hot air. The control device can control the conveying device to transport the base plate to different processing steps, control the glue spraying device to spray UV glue onto the base plate to form a first area, control the printing device to print the hot stamping film onto the first area, control the printing device to print a pattern layer on the hot stamping film, control the glue spraying device to apply a transparent filler layer to the remaining area of ​​the hot stamping film, control the printing device to print a protective layer, control the heating device to heat to a first temperature and maintain it for a first time, and control the curing device to cure the transparent filler layer to obtain the finished digital hot stamping packaging film.

[0022] The control device can be a microprocessor, a microcontroller, a computer, etc.

[0023] To better understand the digital hot stamping packaging film production method provided in the embodiments of this application, the specific implementation process of the digital hot stamping packaging film production method provided in the embodiments of this application will be described by way of example below.

[0024] Figure 1 This illustration shows a schematic flowchart of a digital hot stamping packaging film production method provided in an embodiment of this application. The digital hot stamping packaging film production method includes: S100, base plate provided.

[0025] It is understandable that a printing substrate is provided, which can be aluminum foil. Similarly, aluminum foil can also be used as the inner layer of the packaging film (the layer that comes into contact with the product). In this case, the aluminum foil serves as both the printing substrate and the inner layer of the packaging film.

[0026] S200: A first area is formed by spraying UV adhesive onto the base plate, and a hot stamping film is then printed onto the first area. The area of ​​the hot stamping film is equal to the area of ​​the first area.

[0027] As you can understand, UV adhesive is a type of adhesive that only cures under ultraviolet light. The UV adhesive is sprayed onto the substrate to form the first area, which is the area covered by the UV adhesive. A hot stamping foil is then adhered to the entire substrate, and the UV adhesive is cured again using ultraviolet light. Finally, the hot stamping foil outside the first area is removed, completing the process of printing the hot stamping foil onto the first area. At this point, the area of ​​the hot stamping foil is equal to the area of ​​the first area.

[0028] S300, a pattern layer is printed on the hot stamping film. The area of ​​the pattern layer is smaller than the area of ​​the hot stamping film.

[0029] It is understandable that when printing a design layer on a hot stamping foil, the design layer must be confined within the hot stamping foil, meaning the area of ​​the design layer is smaller than the area of ​​the hot stamping foil. Therefore, it can be considered as two areas: the inner area is the design area, and the outer area is the hot stamping area. The sum of the two is equal to the first area.

[0030] With this setup, from the user's perspective, the hot stamping and the pattern will fit perfectly together without any gaps.

[0031] S400, a transparent filler layer is applied to the remaining area of ​​the hot stamping film; the thickness of the transparent filler layer is greater than the thickness of the pattern layer.

[0032] It is understood that the remaining area of ​​the hot stamping film is the exposed area of ​​the hot stamping, that is, the area not covered by the pattern. A transparent filler layer is then applied to this remaining area of ​​the hot stamping film. The thickness of the transparent filler layer is greater than the thickness of the pattern layer. The material of the transparent filler layer can be UV adhesive or liquid acrylic resin. For UV adhesive and liquid acrylic resin, a squeegee process can be used to form a filler layer of regular thickness, or a positioning spraying process can be used with a longer spraying time to form a thicker, regular transparent filler layer.

[0033] This design allows a transparent filler layer to cover the hot stamping surface, resulting in a better texture compared to traditional recessed hot stamping.

[0034] S500, printed protective layer.

[0035] It is understandable that a protective layer is printed on the outermost layer. The protective layer can be PET film (polyester film), PVC film (polyvinyl chloride film), etc.

[0036] S600: Heat to a first temperature and maintain for a first time, then cool to room temperature and cure the transparent filler layer to obtain the finished digital hot stamping packaging film. The first temperature is lower than the melting point of the other structures in the digital hot stamping packaging film except for the transparent filler layer.

[0037] It is understandable that during the printing process of the protective layer or the coating process of the transparent filler layer, the transparent filler layer may be irregularly shaped. However, by increasing the fluidity of the filler, it can naturally form a convex lens shape under the constraint of the protective layer. Regardless of whether the transparent filler layer is UV adhesive or liquid acrylic resin, it is necessary to raise the temperature to increase its fluidity (the fluidity of liquid acrylic resin and UV adhesive increases with temperature). Therefore, heating to a first temperature and maintaining it for a first time ensures that the transparent filler layer has sufficient fluidity and sufficient flow time. At the first temperature, other structures in the digital hot stamping packaging film, except for the transparent filler layer, must remain stable. Therefore, the first temperature is lower than the melting point of other structures in the digital hot stamping packaging film, except for the transparent filler layer. After the flow is complete, the transparent filler layer naturally forms a convex lens shape under the constraint of the protective film. At this point, cooling to room temperature reduces the fluidity, and then curing the transparent filler layer to maintain its shape can be done using ultraviolet curing. This yields the finished digital hot stamping packaging film.

[0038] This design enhances the three-dimensionality of the hot stamping effect by using a transparent, convex lens-shaped filler layer that is higher than the pattern layer. It also ensures that the pattern layer is printed on the hot stamping layer without creating gaps between the hot stamping and the pattern. This effectively solves the problem that existing digital hot stamping packaging film production methods cannot simultaneously achieve a three-dimensional effect and product quality.

[0039] The structural cross-sectional diagram of the finished digital hot stamping packaging film is as follows: Figure 2 As shown, Figure 2 In the middle, the base plate 1 has a UV adhesive layer 2, the UV adhesive layer 2 has a hot stamping film 3, the UV adhesive layer 2 and the hot stamping film 3 are completely overlapping, the hot stamping film 3 has a pattern layer 4, the area of ​​the pattern layer 4 is smaller than the area of ​​the hot stamping film 3, and there is a transparent filler layer 5 on the exposed area of ​​the hot stamping film 3, the height of the transparent filler layer 5 is greater than the height of the pattern layer 4, and the transparent filler layer 5 is convex, and the outermost layer is a protective layer 6.

[0040] Optionally, the method further includes the following steps before applying the transparent filler layer: S710, design a first center line based on the remaining area of ​​the hot stamping film. The first center line is located on the hot stamping film. A perpendicular line from any point on the first center line intersects the edge of the hot stamping film to form a first line segment, and intersects the edge of the pattern layer to form a second line segment. The lengths of the first line segment and the second line segment are always equal.

[0041] It can be understood that the remaining area of ​​the hot stamping film is a region of the first region minus the central pattern area. Therefore, the topology is a planar ring. The outer line of this planar ring is the boundary of the hot stamping film, and the inner line is the intersection of the pattern and the hot stamping. Based on the remaining area of ​​the hot stamping film, the first center line is designed. The first center line is the midline between the inner and outer lines of the ring, which satisfies the following: the perpendicular line from any point O on the first center line intersects the outer line of the planar ring at point P1, forming the first line segment OP1. The perpendicular line from point O also intersects the inner line of the planar ring at point P2, forming the second line segment OP2. The lengths of OP1 and OP2 are always equal.

[0042] S720, a first adhesive column is coated along the first centerline. The height of the first adhesive column is equal to the thickness of the transparent filler layer.

[0043] It is understandable that the uniformity of the transparent filler layer is inevitably affected during the coating of the transparent filler layer and the printing of the protective layer. For example, during the coating process, more filler may be applied to one side, or during the printing of the protective layer, the protective layer may push the filler from one side to the other. These are unavoidable errors. Therefore, a first adhesive column can be coated, and the first adhesive column is located on the first center line. During the coating of the transparent filler layer, the filler on both sides of the adhesive column has the same surface tension. Under the action of surface tension, the filler will gather towards the adhesive column, thereby spontaneously balancing the amount of filler on both sides, which can effectively offset the error of more filler applied to one side during the coating process. Moreover, the first adhesive column can also support the protective layer, effectively preventing the protective layer from pushing the filler from one side to the other during the printing of the protective layer. The first adhesive column can be a rapidly solidifying molten plastic or other transparent, rapidly curing material.

[0044] The structural cross-sectional view of the finished digital hot stamping packaging film containing the first adhesive column is shown below. Figure 3 As shown, Figure 3 The height of the first adhesive column 11 is greater than the height of the pattern layer 4, and it is located in the middle of the exposed area of ​​the hot stamping film 3.

[0045] This setup, with the addition of a glue column to the hot stamping process, can compensate for errors caused by excessive coating on one side during the coating process. It also prevents the protective layer from squeezing the filler from one side to the other during the printing process, thus improving the quality of the packaging film.

[0046] Optionally, after applying the first adhesive column, an automatic dispensing machine applies adhesive to the remaining area of ​​the hot stamping film, including: S730, multiple dispensing points are determined based on the first center line. The distance traveled by any two adjacent dispensing points on the first center line is the same.

[0047] It is understandable that points are evenly selected along the first center line. Before selecting points, the length of the first center line can be determined first. Then, the length of the first center line / n = s, where s is the distance between any two adjacent dispensing points on the first center line, and n is the number of dispensing points. Then, the first dispensing point is determined on the first center line, and then the distances are separated by s on the first center line. This process is repeated to obtain n dispensing points.

[0048] S740, for every two adjacent dispensing points, a first pattern is defined. The first pattern is the shape enclosed by the perpendicular lines from each of the two adjacent dispensing points, the edge of the pattern layer, and the edge of the hot stamping film.

[0049] It is understandable that each dispensing point has its own perpendicular line (the perpendicular line on the first center line). For any two adjacent dispensing points, the perpendicular lines of these two points, the edge of the pattern layer, and the edge of the hot stamping film uniquely form a shape, called the first shape. Since the first center line is a closed loop, there are n dispensing points and n first shapes.

[0050] S750: Determine the amount of adhesive to be dispensed at the current dispensing position based on the average area of ​​the current first pattern and the previous first pattern. The current first pattern refers to the pattern defined by the current dispensing position and the next adjacent dispensing position.

[0051] It is understandable that we first focus on two dispensing points, i0, i1, and i2 (i1 is the current dispensing point). The next adjacent dispensing point of i1 is i2. i1 and i2 define a first shape with an area of ​​S1. The previous adjacent dispensing point of i1 is i0. The area of ​​the first shape defined by i0 and i1 is S0. For point i1, the glue dispensed by the dispensing machine will tend to flow towards both i0 and i2. Therefore, the amount of glue dispensed at point i1 is determined by the average area of ​​S0 and S1. The amount of glue dispensed at point i1 is directly proportional to the average area of ​​S0 and S1. If the required transparent filler layer thickness is greater, the proportionality coefficient is also greater.

[0052] This setting determines the amount of adhesive applied during the specific coating process of the transparent filler layer, which helps to improve the uniformity of the transparent filler layer.

[0053] Optionally, the refractive index of the first adhesive column is the same as that of the transparent filler layer.

[0054] It is understandable that the first adhesive column and the transparent filler layer are integrated. Therefore, for the viewing effect of hot stamping, the refractive index of the first adhesive column and the refractive index of the transparent filler layer should not differ too much, and preferably should be the same.

[0055] This setting can improve the visual appeal of hot stamping.

[0056] Optionally, before printing the protective layer, the method further includes: S810 involves a semi-curing treatment of the transparent filler layer. The semi-curing treatment refers to an incomplete curing process.

[0057] Understandably, to prevent the protective film from squeezing the filler to other areas during the printing process, a short-term UV curing (i.e., semi-curing) can be performed before printing the protective film. This cures the surface of the transparent filler layer into a film with poor flowability, without curing the interior of the transparent filler layer. This ensures the overall deformability of the transparent filler layer. This film surrounds the remaining area of ​​the hot stamping film with the internal filler, and in conjunction with the first adhesive pillar, further prevents the protective film from squeezing the filler to other areas. The curing time of the semi-curing treatment can be 10% of the curing time.

[0058] This design prevents the protective film from squeezing the filler to other areas while maintaining the overall fluidity of the transparent filler layer, which helps improve the quality of digital hot stamping packaging film.

[0059] Optionally, after heating to a first temperature and maintaining it for a first duration, the method further includes: S820 involves soft rolling of the digital hot stamping packaging film; wherein the soft rolling roller is higher than the pattern layer and lower than the highest point of the transparent filler layer.

[0060] It is understandable that after the temperature is raised to the first temperature, the fluidity of the transparent filler layer reaches its peak. At this time, the flow of the filler can be assisted by external force. For example, an elastic pressure roller can be rolled over the digital hot stamping packaging film at a fixed height. The height should be higher than the pattern layer to prevent damage to the digital hot stamping packaging film, and the height should be lower than the highest point of the transparent filler layer, otherwise it will not be able to make contact.

[0061] This setting can assist the flow of the filler in the transparent filler layer, which helps to accelerate the natural formation of the transparent filler layer into the shape of a convex lens.

[0062] Alternatively, air cooling can be used to bring the temperature down to room temperature.

[0063] It is understandable that, in order to prevent the transparent filler layer from being severely distorted due to excessively rapid cooling, a slow cooling method can be used to lower the temperature to room temperature, or an air cooling method can be used.

[0064] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0065] This application also provides a digital hot stamping packaging film production equipment. Figure 4This is a schematic diagram of the structure of a digital hot stamping packaging film production equipment provided in one embodiment of this application. Figure 4 As shown, the control device 4 of the digital hot stamping packaging film production equipment in this embodiment includes: at least one processor 40 ( Figure 4 Only one is shown in the image), at least one memory 41 ( Figure 4 (Only one is shown in the image) and a computer program 42 stored in the at least one memory 41 and executable on the at least one processor 40. When the processor 40 executes the computer program 42, it causes the control device 4 of the digital hot stamping packaging film production equipment to perform the steps in any of the above embodiments of digital hot stamping packaging film and its production method, or causes the control device 4 of the digital hot stamping packaging film production equipment to perform the functions of each unit in the above embodiments of the device.

[0066] Exemplarily, the computer program 42 may be divided into one or more units, which are stored in the memory 41 and executed by the processor 40 to complete this application. The one or more units may be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program 42 in the control device 4 of the digital hot stamping packaging film production equipment.

[0067] The control device 4 of the digital hot stamping packaging film production equipment can be a microcontroller, microprocessor, mobile phone, tablet computer, wearable device, vehicle-mounted device, laptop computer, ultra-mobile personal computer (UMPC), netbook, personal digital assistant (PDA), or desktop computer. The control device 4 of the digital hot stamping packaging film production equipment may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will understand that... Figure 4 This is merely an example of the control device 4 of the digital hot stamping packaging film production equipment and does not constitute a limitation on the control device 4 of the digital hot stamping packaging film production equipment. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0068] The processor 40 can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0069] In some embodiments, the memory 41 may be an internal storage unit of the control device 4 of the digital hot stamping packaging film production equipment, such as a hard disk or memory of the control device 4. In other embodiments, the memory 41 may be an external storage device of the control device 4, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the control device 4. Further, the memory 41 may include both internal and external storage units of the control device 4. The memory 41 is used to store operating systems, applications, bootloaders, data, and other programs, such as the program code of computer programs. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0070] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for producing digital hot stamping packaging film, characterized in that, The method includes: Provide base plate; A first area is formed by spraying UV adhesive onto the base plate and then hot stamping film is printed on the first area; wherein the area of ​​the hot stamping film is equal to the area of ​​the first area. A pattern layer is printed on the hot stamping film; wherein the area of ​​the pattern layer is smaller than the area of ​​the hot stamping film. A transparent filler layer is applied to the remaining area of ​​the hot stamping film; the thickness of the transparent filler layer is greater than the thickness of the pattern layer. Printed protective layer; The product is heated to a first temperature and maintained for a first time, then cooled to room temperature and cured to obtain the digital hot stamping packaging film; wherein the first temperature is lower than the melting point of the other structures in the digital hot stamping packaging film except for the transparent filler layer.

2. The method for producing digital hot stamping packaging film as described in claim 1, characterized in that, Before applying the transparent filler layer, the method further includes: Based on the remaining area of ​​the hot stamping film, a first center line is designed; wherein, the first center line is located on the hot stamping film, a perpendicular line from any point on the first center line intersects the edge of the hot stamping film to form a first line segment, and intersects the edge of the pattern layer to form a second line segment, and the lengths of the first line segment and the second line segment are always equal; A first adhesive column is coated on the first centerline; wherein the height of the first adhesive column is equal to the thickness of the transparent filler layer.

3. The method for producing digital hot stamping packaging film as described in claim 2, characterized in that, After the first adhesive column is coated, an automatic dispensing machine dispenses adhesive onto the remaining area of ​​the hot stamping film, including: Multiple dispensing points are determined based on the first center line; wherein any two adjacent dispensing points travel the same distance along the first center line. For each pair of adjacent dispensing points, a first shape is defined; wherein, the first shape is a shape enclosed by the perpendicular lines of the two adjacent dispensing points, the edge of the pattern layer, and the edge of the hot stamping film; The amount of adhesive applied at the current dispensing position is determined based on the average area of ​​the current first shape and the previous first shape; wherein, the current first shape refers to the first shape determined by the current dispensing position and the next adjacent dispensing position.

4. The method for producing digital hot stamping packaging film as described in claim 2, characterized in that, The refractive index of the first adhesive column is the same as that of the transparent filler layer.

5. The method for producing digital hot stamping packaging film as described in claim 1, characterized in that, Before printing the protective layer, the method further includes: The transparent filler layer is subjected to a semi-curing treatment; wherein, the semi-curing treatment refers to an incomplete curing treatment.

6. The method for producing digital hot stamping packaging film as described in claim 1, characterized in that, After heating to a first temperature and maintaining it for a first duration, the method further includes: The digital hot stamping packaging film is subjected to soft rolling; wherein the rolling roller is higher than the pattern layer and lower than the highest point of the transparent filler layer.

7. The method for producing digital hot stamping packaging film as described in claim 1, characterized in that, The base plate is aluminum foil, which also serves as the inner layer of the packaging film and comes into direct contact with the product.

8. The method for producing digital hot stamping packaging film as described in claim 1, characterized in that, The cooling method described above is air cooling to bring the temperature down to room temperature.

9. A digital hot stamping packaging film, characterized in that, Made by the digital hot stamping packaging film production method according to any one of claims 1 to 8.

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