Manufacturing method of cigarette packaging box positioning transfer card and cigarette packaging paper

Abstract

The invention belongs to the technical field of packaging box processing, and particularly relates to a manufacturing method of a cigarette packaging box positioning transfer card and cigarette packaging paper. The method comprises the following steps: coating the release layer on the base film; forming a holographic laser pattern on the release layer, and forming a plain trapezoidal mark at a set position; depositing an aluminum layer on the molded film surface; the aluminum laminated film is attached to the white cardboard; stripping the base film to transfer the aluminum layer and the holographic pattern to the surface of the white cardboard; forming a matt white triangular mark on the surface of the white cardboard with the transferred aluminum layer, wherein the matt white triangular mark directly replaces the position of the plain surface trapezoidal mark on the original film; and the finished product positioning transfer card is formed through curing treatment and trimming procedures. Due to the fact that a secondary alignment link is omitted, registration errors caused by plate cycle fluctuation and unstable electric eye recognition are effectively avoided, and in combination with accurate control over tension in wet-type compounding, the positioning accuracy and the product percent of pass are remarkably improved, the technological process is simplified, the production cost is reduced, and the overall production efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of packaging box processing technology, specifically relating to a method for manufacturing a positioning transfer card for cigarette packaging boxes and cigarette packaging paper. Background Technology

[0002] With the continuous development of anti-counterfeiting technology for cigarette packaging, the application of positioning transfer printing technology in high-end cigarette packaging is becoming increasingly widespread. Positioning transfer printing technology precisely transfers holographic laser patterns to specific locations on paper, achieving both anti-counterfeiting and aesthetic effects. In existing technologies, roll positioning transfer cards generally employ a traditional secondary positioning process: first, black marks are printed on the edge of the white cardboard, and then a laminating device aligns the marks on the positioning film with the marks on the paper edge to achieve positioning transfer.

[0003] However, traditional positioning processes have significant drawbacks: First, they require an additional sheet of paper, more than ten millimeters wide, to accommodate the positioning marks, increasing raw material costs. Second, the secondary positioning process increases the probability of plate circumference instability, easily leading to cumulative errors due to plate circumference fluctuations, resulting in substandard registration accuracy of the final printed products, or even halting production. Third, the black trapezoidal mark in traditional processes is easily affected by environmental factors during printing, reducing the stability of photoelectric tracking and affecting printing registration accuracy. Finally, problems such as uneven base film shrinkage, inaccurate plate distance control, and unstable tension in existing processes further exacerbate the decline in positioning accuracy, leading to a lower product qualification rate and reduced production efficiency. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a manufacturing method for a cigarette packaging box positioning transfer card and cigarette packaging paper, which can simplify the process, reduce costs and improve product qualification rate while ensuring accurate positioning.

[0005] In a first aspect, this application provides a method for manufacturing a positioning transfer card for a cigarette packaging box, comprising the following steps: A release layer is coated onto the base film; A holographic laser pattern is formed on the release layer through a molding process, while a plain trapezoidal mark is formed at a set position. An aluminum layer is deposited on the molded film surface using a vacuum aluminizing process. Aluminized film and white cardboard are bonded together using a wet lamination process, wherein the degree of film stretching is controlled according to preset tension parameters during lamination. Peel off the base film to transfer the aluminum layer and holographic pattern to the surface of the white cardboard; A matte white triangular mark is formed on the surface of the white cardboard with the transferred aluminum layer by a surface coating process. The matte white triangular mark directly replaces the position of the plain trapezoidal mark on the original film. After curing and trimming processes, a finished positioning transfer card is formed; wherein, the matte white triangular mark is used as the first tracking color mark in the gravure printing process to achieve printing registration, avoiding the need for additional positioning marks on the edge of the white cardboard.

[0006] Optionally, in the molding process, the transverse dimension X of the film is greater than the design value of 0.6±0.1mm, the longitudinal spacing Y of the film is greater than the design value of 0.8±0.1mm, and the loose edge error of the left-center-right spacing of each film is controlled within the range of ≤0.2mm.

[0007] Optionally, in the wet lamination process, the centering of the paper film is controlled, the S-shaped deviation of the paper film is ≤ ±0.25mm, and the positioning film data is detected before and after lamination to ensure that the film registration error is ≤ ±0.1mm and the pattern distortion is ≤ 0.2mm.

[0008] Optionally, in the surface coating process, a water-based coating is used, with the viscosity adjusted to 18±1 seconds in a Zahn No. 2 cup, a solid content of 18±1%, and a wet coating amount of 4.5±0.5 g / m³. 2 The matte white triangular markings achieve their matteness by adjusting the paint formulation and coating parameters.

[0009] Optionally, the curing process is carried out in a sealed environment at room temperature for ≥24 hours, and the moisture content of the paper after curing is controlled within the range of 6.0%~8.0%.

[0010] Optionally, the trimming process adopts a high-precision fixed-length control system to ensure that the width of the finished product positioning transfer card is 762±0.1mm, the circumference is 619.8±0.1mm, and the upper and lower guide line error is ≤±0.1mm.

[0011] Optionally, the color parameters of the matte white triangular mark are designed so that the color difference value is controlled within a set range to improve the sensitivity and stability of the photoelectric eye recognition. The color difference value is achieved by comprehensively controlling the composition ratio of the coating, the coating thickness, and the drying temperature parameters.

[0012] Optionally, the method further includes a back coating process, namely, applying a water-based back coating adhesive to the back of the paper after lamination, with a wet coating amount of 5.5 ± 0.5 g / m². 2 .

[0013] Optionally, the edge clarity and internal uniformity of the matte white triangular mark are achieved by controlling the coating speed, drying temperature profile, and coating leveling properties. The coating speed is controlled at 100~110m / min, the drying temperature is set in a gradient of 80-90-105-85℃, and the cooling roller temperature is controlled at 25~28℃.

[0014] Optionally, the method further includes a quality control step: using the original film to check the registration of the finished product to ensure that the longitudinal and transverse positioning accuracy meets the ±0.1mm standard and the pattern distortion is ≤0.2mm. At the same time, the adhesion between the aluminum layer and the paper is tested with tape to ensure that there is no obvious aluminum layer peeling.

[0015] Secondly, this application provides a cigarette packaging paper, which is obtained by gravure printing using a positioning transfer card obtained by the manufacturing method described above.

[0016] The beneficial effects of this application are that by directly molding a plain trapezoidal mark onto the base film and then accurately replacing that position with a matte white triangular mark in subsequent processes as the first tracking mark in gravure printing, the step of additionally printing a black positioning mark on the edge of the white cardboard in the traditional process is eliminated, thus eliminating the need to widen the paper width and saving raw materials. At the same time, since the secondary alignment step is eliminated, registration errors caused by plate circumference fluctuations and unstable photoelectric recognition are effectively avoided. Combined with the precise control of tension in wet lamination, the positioning accuracy and product qualification rate are significantly improved, the process flow is simplified, production costs are reduced, and overall production efficiency is improved. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0018] In a first aspect, this application provides a method for manufacturing a positioning transfer card for a cigarette packaging box, comprising the following steps: A release layer is coated onto the base film; A holographic laser pattern is formed on the release layer through a molding process, while a plain trapezoidal mark is formed at a set position. An aluminum layer is deposited on the molded film surface using a vacuum aluminizing process. Aluminized film and white cardboard are bonded together using a wet lamination process, wherein the degree of film stretching is controlled according to preset tension parameters during lamination. Peel off the base film to transfer the aluminum layer and holographic pattern to the surface of the white cardboard; Through a surface coating process, a matte white triangular mark is formed on the surface of the white cardboard with the transferred aluminum layer. The matte white triangular mark directly replaces the position of the plain trapezoidal mark on the original film. After curing and trimming, the finished positioning transfer card is formed. The matte white triangular mark is used as the first tracking color mark in the gravure printing process to achieve printing registration, avoiding the need for additional positioning marks on the edge of the white card.

[0019] This application provides a method for manufacturing a positioning transfer card for cigarette packaging boxes. A plain trapezoidal mark is directly molded onto a base film, and in subsequent processes, a matte white triangular mark precisely replaces this position as the first tracking color mark in gravure printing. This eliminates the step of additionally printing black positioning marks on the edge of white cardboard in traditional processes, thus avoiding the need to widen the paper width and saving raw materials. Simultaneously, by eliminating the secondary alignment step, registration errors caused by plate circumference fluctuations and unstable photoelectric sensor recognition are effectively avoided. Combined with precise tension control in wet lamination, this significantly improves positioning accuracy and product qualification rate, simplifies the process, reduces production costs, and increases overall production efficiency.

[0020] It should be noted that the base film is selected from, but not limited to, polyethylene terephthalate film, biaxially oriented polypropylene film, polyethylene naphthalate film, and polycarbonate.

[0021] In one possible implementation, during the molding process, the transverse dimension X of the film is greater than the design value of 0.6±0.1mm, the longitudinal spacing Y of the film is greater than the design value of 0.8±0.1mm, and the loose edge error of the left-center-right spacing of each film is controlled within the range of ≤0.2mm.

[0022] Specifically, by pre-setting the transverse dimension X and longitudinal spacing Y of the film to be slightly larger than the design values ​​during the molding process (X tolerance 0.6±0.1mm, Y tolerance 0.8±0.1mm), and strictly controlling the loose edge error of the left, center, and right spacing of each plate within ≤0.2mm, the dimensional deformation caused by material shrinkage or tension changes during subsequent aluminizing, lamination, and curing processes is effectively compensated, thereby ensuring the relative positional accuracy between the holographic pattern and the matte white triangular mark. This pre-expansion design, combined with high-precision spacing consistency control, significantly improves the registration stability of the positioning transfer card in subsequent gravure printing, avoiding pattern offset or tracking failure caused by uneven film shrinkage, and further ensuring the consistency of product yield and anti-counterfeiting effect.

[0023] In one possible implementation, during the wet lamination process, the centering of the paper film is controlled, the S-shaped deviation of the paper film is ≤ ±0.25mm, and the positioning film data is checked before and after lamination to ensure that the film registration error is ≤ ±0.1mm and the pattern distortion is ≤ 0.2mm.

[0024] Specifically, by strictly controlling the centering of the paper film in the wet lamination process, the S-shaped deviation is limited to within ±0.25mm. Key data of the positioning film are also tested before and after lamination to ensure that the film registration error does not exceed ±0.1mm and the pattern distortion is controlled within 0.2mm. This effectively avoids pattern misalignment caused by paper film offset, uneven tension, or lamination deformation.

[0025] In one possible implementation, the surface coating process uses an aqueous coating material, with the viscosity adjusted to 18±1 seconds at a Zahn No. 2 cup, a solid content of 18±1%, and a wet coating weight of 4.5±0.5 g / m³. 2 The matte white triangular markings achieve their matteness by adjusting the paint formulation and coating parameters.

[0026] Specifically, water-based coatings are used in the surface coating process, with viscosity precisely controlled at 18±1 seconds in the Zahn No. 2 cup, solid content maintained at 18±1%, and wet coating amount set at 4.5±0.5 g / m². This ensures a uniform and stable coating that adheres well to the transferred aluminum layer. Simultaneously, by optimizing the coating formulation (such as the type and proportion of matting agents) and coating parameters (such as linear speed and oven temperature), the surface matteness of the matte white triangular marks is precisely controlled. This ensures high contrast while preventing glare from interfering with photoelectric sensor detection. This approach is not only environmentally friendly and safe but also guarantees the stability and repeatability of the marks as the first tracking color mark during high-speed gravure printing, further improving registration reliability and finished product consistency.

[0027] In one possible implementation, the curing process is carried out in a sealed environment at room temperature for ≥24 hours, and the moisture content of the paper after curing is controlled within the range of 6.0%~8.0%.

[0028] Specifically, by sealing and curing the composite material at room temperature for no less than 24 hours, the adhesive is fully cross-linked and cured, ensuring that the adhesion between the aluminized layer and the white cardboard reaches its optimal state. At the same time, by controlling the moisture content of the cured paper within a reasonable range of 6.0% to 8.0%, the dimensional stability and flexibility of the paper are effectively balanced, avoiding deformation due to excessive moisture or brittleness due to insufficient moisture. This ensures that the relative positional accuracy of the holographic pattern and the matte white triangular mark is not affected by fluctuations in ambient humidity.

[0029] In one possible implementation, the trimming process employs a high-precision fixed-length control system to ensure that the width of the finished product positioning transfer card is 762±0.1mm, the plate circumference is 619.8±0.1mm, and the upper and lower guideline errors are ≤±0.1mm. This effectively guarantees the consistency of the registration reference in subsequent gravure printing and die-cutting. It not only eliminates the risk of pattern shift or tracking failure caused by cutting deviations but also significantly improves the geometric stability and interchangeability of the entire batch of products, providing a key process guarantee for achieving high-speed automated printing and high-yield production.

[0030] In one possible implementation, the color parameters of the matte white triangular marker are designed so that the color difference value is controlled within a set range to improve the sensitivity and stability of the photoelectric sensor. The color difference value is achieved by comprehensively controlling the composition ratio of the coating, the coating thickness, and the drying temperature parameters.

[0031] Specifically, by refining the color parameters of the matte white triangular markers, the color difference value is strictly controlled within a set range, creating a high-contrast and stable optical difference with the surrounding aluminum layer or substrate. This significantly improves the sensitivity and anti-interference ability of the photocell in recognizing the tracking color mark during high-speed printing. This color difference control does not rely on a single process variable, but achieves color consistency and repeatability by synergistically optimizing key parameters such as the proportion of coating components (e.g., titanium dioxide content, matting agent type), coating thickness (affecting hiding power and reflectivity), and drying temperature (regulating film density and surface gloss).

[0032] In one possible implementation, the method further includes a back coating step, namely, applying an aqueous back coating adhesive to the back of the paper after lamination, with a wet coating amount of 5.5 ± 0.5 g / m². 2 This not only effectively improves the flatness and stiffness of the paper, preventing curling or edge warping caused by single-sided lamination, but also enhances the dimensional stability and mechanical adaptability of the finished product during subsequent printing, die-cutting, and packaging processes. Simultaneously, the water-based back coating is environmentally friendly and non-toxic, has excellent drying properties, strong adhesion to the white cardboard substrate, and does not interfere with the functionality of the front holographic pattern and matte white triangular markings. Therefore, while ensuring high-precision positioning and transfer effects, it further improves the overall processing yield and finished product quality.

[0033] In one possible implementation, the edge sharpness and internal uniformity of the matte white triangular markings are achieved by controlling the coating speed, drying temperature profile, and coating leveling properties. The coating speed is controlled at 100-110 m / min, the drying temperature is set in a gradient of 80-90-105-85°C, and the cooling roller temperature is controlled at 25-28°C. In this case, the moderate coating speed ensures sufficient spreading and stable transfer of the coating on the substrate; the gradient heating drying process first gently pre-dries to avoid surface skinning, then thoroughly cures at high temperature to improve adhesion, and finally slowly cools and sets the shape to prevent stress concentration; combined with a precisely temperature-controlled cooling roller, the coating structure can be quickly stabilized, suppressing edge retraction or solvent residue.

[0034] In one possible implementation, the method further includes a quality control step: using the original film to check the registration of the finished product to ensure that the longitudinal and transverse positioning accuracy meets the ±0.1mm standard and the pattern distortion is ≤0.2mm. At the same time, the adhesion between the aluminum layer and the paper is tested with tape to ensure that there is no obvious aluminum layer peeling.

[0035] Specifically, on the one hand, the original large film was used to check the registration of the finished product to ensure that the positioning accuracy in both the longitudinal and transverse directions was controlled within ±0.1mm and the pattern distortion did not exceed 0.2mm. This effectively verified whether the spatial correspondence between the holographic laser pattern and the matte white triangular mark met the requirements of high-precision printing. On the other hand, the bonding force between the aluminum layer and the white cardboard substrate was evaluated through standard tape testing to ensure that there was no obvious aluminum layer peeling off during actual use or subsequent processing, thus guaranteeing the structural integrity of the product and the durability of its anti-counterfeiting function.

[0036] Secondly, this application provides a cigarette packaging paper, which is obtained by gravure printing using a positioning transfer card manufactured by the above method.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0038] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A method of manufacturing a cigarette pack positioning transfer card, characterized by, The method comprises the following steps: coating a release layer on a base film; forming a holographic laser pattern on the release layer by a molding process, while forming a plain trapezoidal mark at a set position; depositing an aluminum layer on the molded film surface by a vacuum aluminum plating process; adhering the aluminum-plated film to a white card by a wet compounding process, wherein the stretching degree of the film is controlled according to preset tension parameters during compounding; peeling off the base film, so that the aluminum layer and the holographic pattern are transferred to the surface of the white card; forming a dull white triangular mark on the surface of the white card with the transferred aluminum layer by a surface coating process, the dull white triangular mark directly replacing the position of the plain trapezoidal mark on the original film; forming a finished product positioning transfer card after aging treatment and edge trimming processes, wherein the dull white triangular mark serves as the first traceable color mark in the process of gravure printing, and is used to realize printing register, thereby avoiding the need for additional positioning marks on the edge of the white card.

2. The method of manufacturing a cigarette pack locator transfer card of claim 1, wherein, In the molding process, the transverse dimension X of the film is greater than the design value 0.6±0.1 mm, the longitudinal register Y of the film is greater than the design value 0.8±0.1 mm, and the left, middle and right register loose edge error is controlled within ≤0.2 mm.

3. The method of manufacturing a cigarette pack locator transfer card of claim 1, wherein, In the wet compounding process, the paper film centering degree is controlled, the S-type deviation of the paper film is ≤±0.25 mm, the positioning film data is detected before and after compounding to ensure that the film register checking error is ≤±0.1 mm and the pattern distortion degree is ≤0.2 mm.

4. The method of manufacturing a cigarette pack locator transfer card of claim 3, wherein, In the surface coating process, water-based paint is used, the viscosity is adjusted to 18±1 seconds in Zahn No. 2 cup, the solid content is 18±1%, and the wet coating amount is 4.5±0.5 g / m 2 The dullness of the dull white triangular mark is achieved by adjusting the paint formula and coating parameters.

5. The method of manufacturing a cigarette pack locator transfer card of claim 1, wherein, The aging treatment is carried out in a sealed environment at room temperature, the aging time is ≥24 hours, and the moisture of the paper after aging is controlled within the range of 6.0% to 8.0%.

6. The method of manufacturing a cigarette pack locator transfer card of claim 1, wherein, The edge trimming process adopts a high-precision fixed-length control system to ensure that the width of the finished product positioning transfer card is 762±0.1 mm, the register around the card is 619.8±0.1 mm, and the up and down rule line error is ≤±0.1 mm.

7. The method of manufacturing a cigarette pack locator transfer card of claim 1, wherein, The color parameters of the dull white triangular mark are designed to control the color difference value within a set range to improve the sensitivity and stability of the electric eye recognition. The color difference value is achieved by comprehensively controlling the component ratio of the paint, the coating thickness and the drying temperature parameters.

8. The method of manufacturing a cigarette pack locator transfer card of claim 1, wherein, The method further comprises a back-coating process, i.e. coating the back of the paper with an aqueous back-coating adhesive after the compounding, the wet coating amount being 5.5±0.5 g / m 2 ; And / or, the edge definition and internal uniformity of the dull white triangular mark are achieved by controlling the coating speed, the drying temperature curve and the paint leveling property, the coating speed is controlled within 100-110 m / min, the drying temperature is set to a gradient of 80-90-105-85°C, and the cooling roller temperature is controlled within 25-28°C.

9. The method of manufacturing a cigarette pack locator transfer card of claim 1, wherein, The method further comprises a quality control step: using the original large film to check the register of the finished product to ensure that the longitudinal and transverse positioning accuracy meets the ±0.1 mm standard and the pattern distortion degree is ≤0.2 mm, and testing the bonding force of the aluminum layer and the paper by using adhesive tape to ensure that there is no obvious aluminum layer peeling phenomenon.

10. A cigarette wrapper, characterized by The positioning transfer card obtained by the manufacturing method of any one of claims 1-9 is subjected to gravure printing.