Cover film applying thermal printing technology
By directly printing food information by applying thermal printing technology on the lid film of the fresh-keeping box, the problem of easy replacement of the lid film label in the prior art is solved, and process simplification and food safety are achieved.
Patent Information
- Application Number
- CN202421221087.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing fresh-keeping lid film uses self-adhesive labels to display production dates and other information, resulting in complex processes and easy replacement of information, affecting food safety.
Thermal printing technology is used to set up a thermal printing area on the surface of the cover film to directly print food information in this area to avoid additional printing labels.
The process steps are simplified, avoiding the problem of the easy replacement of traditional labels, ensuring consumers obtain accurate product information, and ensuring food safety.
Smart Images
Figure CN222497271U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fresh-keeping box cover films, in particular to a cover film using a thermal printing technology. Background Art
[0002] Plastic fresh-keeping boxes have the highest market share and are most commonly used in daily life. Fresh-keeping boxes and their end covers are formed by injection molding. After molding is completed and before the packaging process is carried out, a film is generally applied to the surface of the box cover to adjust the oxygen and moisture content around the fresh-keeping products and block dust, thereby extending the shelf life of the food.
[0003] At present, the existing fresh-keeping box cover films in China generally adopt the method of sticking a self-adhesive label (with production date printed) on the cover film to achieve the purpose of displaying sales information. This method first prints the main product information on the film. When selling, it is necessary to stick another layer of self-adhesive label on the film to indicate product information such as production date, etc., which adds a certain complexity in both process and materials, and the information displayed by the pasted self-adhesive label is easy to be replaced, resulting in consumers may not get accurate product information, affecting food safety.
[0004] Therefore, it is necessary to provide a cover film using thermal printing technology to solve the above technical problems. Utility Model Content
[0005] One of the purposes of the utility model is to provide a cover film using thermal printing technology. A thermal printing area is set on the surface of the cover film, and relevant food information can be printed in the area without additionally attaching a printed label. Not only is the process simple, but it can also effectively avoid food safety problems caused by replacing traditional printed labels.
[0006] To achieve the above object, the utility model provides the following technical solutions: a cover film using thermal printing technology, comprising a printing layer and a heat-sealing layer, wherein the inner surface of the printing layer is provided with a marking layer, and the marking layer is used to print patterns or text information;
[0007] The outer surface of the printing layer is provided with a thermal printing area, wherein a thermal coating is provided in the thermal printing area, and the thermal coating is formed by printing a thermal coating.
[0008] Preferably, the number of the thermal printing areas is not limited to one.
[0009] Preferably, each thermal printing area includes one or more printing areas, and each printing area is used to print different information;
[0010] Furthermore, the color of each printing area may be different.
[0011] Preferably, the thermosensitive coating is a water-based coating, and an adhesion enhancer is added to the thermosensitive coating.
[0012] Preferably, the thermosensitive coating is formed by two gravure printings of a thermosensitive coating;
[0013] And / or, the amount of thermal sensitive coating used in the first gravure printing is 70% to 80% of the total amount of coating, and the amount of thermal sensitive coating used in the second gravure printing is 20% to 30% of the total amount of coating.
[0014] And / or, a protective layer is further provided on the surface of the heat-sensitive coating.
[0015] Preferably, the amount of the thermosensitive coating per square meter is 2.4g~3.0g;
[0016] And / or, the amount of the protective layer per square meter is 1.5g~2.1g.
[0017] Preferably, the printing layer is made of PET material, and the heat sealing layer is made of PE material;
[0018] And / or, the printing layer and the heat-sealing layer are bonded together with glue to form an integral structure.
[0019] Preferably, the surface of the printing layer is treated with corona, and the corona value is 25-35 dyne / cm.
[0020] Preferably, the first platemaking parameters and the second platemaking parameters of gravure printing used in the thermosensitive coating forming process are different.
[0021] Preferably, the engraving mesh number used in the first plate making parameters is 130-140 mesh / cm 2 , the engraving angle is 110°~125°;
[0022] The engraving mesh number used in the second plate making parameters is 190~210 mesh / cm 2 , the engraving angle is 125°~140°.
[0023] Compared with the prior art, the beneficial effects of the utility model are:
[0024] 1. The utility model applies thermal printing technology. When sealing the cover film, an integrated printer is used for one-time molding, and product-related content is marked on the cover film to achieve the purpose of displaying sales information. Compared with the traditional process, this design omits the process of self-adhesive labels, simplifies the material structure, makes the material single, ensures the integration of the material, and saves production costs.
[0025] 2. Each thermal printing area of the utility model includes one or more printing areas, each printing area is used to print different information, and food information, merchant information and other information can be printed separately, which is more convenient and flexible to use.
[0026] 3. The utility model uses thermal printing technology to print relevant food information on the surface of the cover film. Compared with the prior art of displaying information through pasted self-adhesive labels, the problem of replacing information is eliminated, so that consumers can obtain accurate product information and ensure food safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a front view structural schematic diagram of the utility model;
[0028] Figure 2 This is a schematic diagram of the top view of the printing layer of the utility model;
[0029] In the figure: 1. Printing layer; 2. Heat sealing layer; 3. Labeling layer; 4. Thermosensitive coating. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following is an explanation of the embodiments of the present utility model based on the overall structure of the present utility model.
[0032] Example 1: Please refer to Figure 1-2 In this embodiment, a cover film using thermal printing technology includes a printing layer 1 and a heat-sealing layer 2, wherein the printing layer 1 is made of PET material and the heat-sealing layer 2 is made of PE material. The inner surface of the printing layer 1 is provided with a logo layer 3, which is used to print patterns or text information to facilitate the display of food, brand and company information, etc.; the outer surface of the printing layer 1 is provided with a thermal printing area, wherein the thermal printing area is provided with a thermal coating 4, and the thermal coating 4 is formed by thermal coating by gravure printing.
[0033] like Figure 1-2 As shown, the number of thermal printing areas is not limited to one, and can be used to print information and patterns of different contents.
[0034] Furthermore, in some feasible embodiments, each thermal printing area includes one or more printing areas, each printing area is used to print different information; the color of each printing area may be inconsistent, and the inconsistent colors can be used to distinguish information of different contents.
[0035] In this embodiment, the thermal coating is a water-based coating, and an adhesion enhancer is added to the thermal coating to increase the adhesion between the thermal coating 4 and the printed layer to prevent the thermal coating from falling off. Specifically, the adhesion enhancer used in this embodiment is a titanate coupling agent.
[0036] In order to obtain a relatively good outer surface of the thermal coating 4, the thermal coating 4 in this embodiment is formed by two gravure printings of thermal coating, the amount of thermal coating used in the first gravure printing is 70% to 80% of the total amount of coating, and the amount of thermal coating used in the second gravure printing is 20% to 30% of the total amount of coating. In addition, a protective layer is also provided on the surface of the thermal coating 4, and a curing agent is added to the protective layer, which can provide good protection for the thermal coating 4, prevent the outer surface of the thermal printing coating 4 from being scratched or worn, and ensure the subsequent thermal printing effect. Specifically, the curing agent in this embodiment is an isocyanate curing agent.
[0037] In practice, the amount of thermal coating 4 used per square meter is 2.7g; the amount of protective layer used per square meter is 1.8g. Too much protective layer will cause the protective layer thickness to be too large, and the thermal printing effect will be poor. Too little protective layer will cause the protective layer thickness to be too small, and it will be difficult to play a protective role.
[0038] Since the surface of the printing layer 1 is relatively smooth, when the thermal-sensitive coating is printed on its surface, the coating adhesion is poor, which may cause the thermal-sensitive coating to fall off. In this embodiment, in order to further improve the adhesion between the thermal-sensitive coating 4 and the printing layer 1, the surface of the printing layer 1 is subjected to corona treatment, and the corona value is 25-35 dynes / cm. By subjecting the surface of the printing layer 1 to corona treatment and treating the roughness of the film surface with a corona value of 25-35 dynes / cm, the printing layer 1 is made rougher, and the adhesion between it and the thermal-sensitive coating 4 is increased. In practice, after the thermal-sensitive coating 4 is printed and formed, the thermal-sensitive coating 4 is pulled by the tape, and the thermal-sensitive coating 4 is not torn off with the tape, which is a qualified state, and the coating is not likely to fall off during the later use process.
[0039] like Figure 1-2 As shown, the first plate-making parameters and the second plate-making parameters of the gravure printing in the process of forming the thermosensitive coating 4 are different. The engraving mesh number used in the first plate-making parameters is 135 mesh / cm 2 , the engraving angle is 120°; the engraving mesh number used in the second plate making parameters is 200 mesh / cm 2 , the engraving angle is 130°.
[0040] In this embodiment, the printing layer 1 and the heat-sealing layer 2 are glued together to form an integral structure, and the heat-sealing strength of the entire cover film is greater than 15N, and the peeling strength is greater than 1.5N.
[0041] In this embodiment, after first printing a customized pattern or text information on the inner surface of the identification layer 3, the identification layer 3 is turned over, and the thermal printing area on the outer surface of the identification layer 3 is printed with a thermal coating twice to form a thermal coating 4, and a protective layer containing a curing agent is printed or coated on the surface of the thermal coating 4, and then the identification layer 3 and the heat sealing layer 2 are glued together to form a cover film as a whole. When in use, the relevant information of the food is printed in the thermal printing area by thermal printing, and then the heat sealing effect of the heat sealing layer 2 is used to seal the cover film on the surface of the food box to seal the food. Compared with the traditional process, this design omits the process of self-adhesive labels, simplifies the material structure, makes the material single, ensures the integration of the material, and saves production costs.
[0042] Example 2: A cover film using thermal printing technology in this example has the same basic structure as that in Example 1, except that the engraving mesh number used in the first plate-making parameters of gravure printing during the molding process of the thermal coating 4 in this example is 130 mesh / cm 2 , the engraving angle is 110°; the engraving mesh number used in the second plate making parameters is 190 mesh / cm 2 , the engraving angle is 125°.
[0043] The amount used per square meter in the heat-sensitive coating 4 is 2.4 g; the amount used per square meter in the protective layer is 1.5 g.
[0044] Example 3: A cover film using thermal printing technology in this example has the same basic structure as that in Example 1, except that the engraving mesh number used in the first plate-making parameters of gravure printing during the molding process of the thermal coating 4 in this example is 140 mesh / cm 2 , the engraving angle is 125°; the engraving mesh number used in the second plate making parameters is 210 mesh / cm 2 , the engraving angle is 140°.
[0045] The amount used per square meter in the heat-sensitive coating 4 is 3.0 g; the amount used per square meter in the protective layer is 2.1 g.
[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A cover film using thermal printing technology, comprising a printing layer (1) and a heat-sealing layer (2), characterized in that: The inner surface of the printing layer (1) is provided with a marking layer (3), and the marking layer (3) is used for printing patterns or text information; The outer surface of the printing layer (1) is provided with a thermal printing area, wherein a thermal coating (4) is provided in the thermal printing area, and the thermal coating (4) is formed by printing a thermal coating.
2. The cover film using thermal printing technology according to claim 1, characterized in that: The number of the thermal printing areas is not limited to one.
3. The cover film using thermal printing technology according to claim 2, characterized in that: Each thermal printing area includes one or more printing areas, each of which is used to print different information; And / or, the color of each printed area may not be consistent.
4. The cover film using thermal printing technology according to claim 1, characterized in that: The heat-sensitive paint is a water-based paint, and an adhesion enhancer is added into the heat-sensitive paint.
5. The cover film using thermal printing technology according to claim 1, characterized in that: The thermosensitive coating (4) is formed by two gravure printing processes using a thermosensitive coating; and / or, the amount of the thermal-sensitive coating used in the first gravure printing is 70% to 80% of the total amount of the coating, and the amount of the thermal-sensitive coating used in the second gravure printing is 20% to 30% of the total amount of the coating; And / or, the surface of the heat-sensitive coating (4) is also provided with a protective layer.
6. The cover film using thermal printing technology according to claim 5, characterized in that: The amount of the thermosensitive coating (4) per square meter is 2.4 g to 3.0 g; And / or, the amount of the protective layer per square meter is 1.5g~2.1g.
7. The cover film using thermal printing technology according to claim 1, characterized in that: The printing layer (1) is made of PET material, and the heat sealing layer (2) is made of PE material; And / or, the printing layer (1) and the heat-sealing layer (2) are bonded together by glue to form an integral structure.
8. The cover film using thermal printing technology according to claim 1, characterized in that: The surface of the printing layer (1) is treated with corona, and the corona value is 25-35 dyne / cm.
9. A cover film using thermal printing technology according to any one of claims 1 to 8, characterized in that: During the molding process of the thermosensitive coating (4), the first platemaking parameters and the second platemaking parameters of gravure printing are different.
10. The cover film using thermal printing technology according to claim 9, characterized in that: The engraving mesh number used in the first plate making parameters is 130~140 mesh / cm 2 , the engraving angle is 110°~125°; The engraving mesh number used in the second plate making parameters is 190~210 mesh / cm 2 , the engraving angle is 125°~140°.