Composite sheet structure capable of being used for medicine packaging and flexible resin printing plate
By introducing multi-layer structures and flexible resin printing plates with staggered longitudinal graphic and text patterns into composite sheets for medical packaging, the problem of graphic and text edges in flexographic printing is solved, and clear graphic and text display and cost control are achieved.
Patent Information
- Application Number
- CN202421476189.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-06-26
AI Technical Summary
When the existing composite sheets for pharmaceutical packaging are flexographically printed, the edges of the graphics and text are prone to become vague, and the gravure printing costs are high.
A composite sheet structure consisting of an outer PE film layer, a flexographic ink layer, an intermediate creamy PE film layer, an Al barrier film layer and an inner PE film layer are adopted, and a flexible resin printing plate composed of a plurality of staggered longitudinal graphic and text sheets are printed. Combined with ink with high adhesion fastness, the printing pressure is evenly dispersed.
It realizes the printing effect of clear and unfilm pictures and texts, reduces printing costs, and avoids the problem of imperfect pictures and texts at the edges.
Smart Images
Figure CN223199693U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of composite sheets, and in particular relates to a composite sheet structure that can be used for medicine packaging and a flexible resin printing plate that can be used for printing images and texts on the composite sheet structure. Background Art
[0002] Composite sheets used in pharmaceutical packaging can be made into flexible tubes for plasters. Besides requiring a barrier layer to ensure a good barrier effect, they also require printed graphics to explain and promote the product. Existing composite sheets for pharmaceutical packaging typically feature gravure printing of graphics on the film layer. However, gravure printing requires a large amount of ink, leading to high ink and plate-making costs. Using less expensive flexographic printing on the film layer can also result in blurred edges. Utility Model Content
[0003] Based on the content in the background technology, in order to solve the problem that the existing composite sheet for pharmaceutical packaging adopts flexographic printing, resulting in poor image and text display effect, the utility model provides another composite sheet structure and a flexible resin printing plate.
[0004] Provided is a composite sheet structure that can be used for pharmaceutical packaging, which comprises, from the outside to the inside, an outer PE film layer, a flexographic ink layer, a middle milky white PE film layer, a first EAA adhesive layer, an Al barrier film layer, a second EAA adhesive layer, and an inner PE film layer;
[0005] The flexographic ink layer is arranged on the inner surface of the outer PE film layer by flexographic printing, one side of the intermediate milky white PE film layer is compositely connected to the side of the outer PE film layer provided with the flexographic ink layer, the other side of the intermediate milky white PE film layer is compositely connected to one side of the Al barrier film layer through the first EAA adhesive layer, and the other side of the Al barrier film layer is compositely connected to the inner PE film layer through the second EAA adhesive layer.
[0006] The middle milky white PE film layer can play a whitening effect, which can highlight the graphic display effect of the flexographic ink layer.
[0007] Furthermore, the thickness of the outer PE film layer is 85-95um, the thickness of the middle milky white PE film layer is 35-45um, the thickness of the first EAA adhesive layer is 25-35um, the thickness of the Al barrier film layer is 25-35um, the thickness of the second EAA adhesive layer is 25-35um, and the thickness of the inner PE film layer is 65-75um.
[0008] Preferably, the outer PE film layer is 90um thick, the middle milky white PE film layer is 40um thick, the first EAA adhesive layer is 30um thick, the Al barrier film layer is 30um thick, the second EAA adhesive layer is 30um thick, and the inner PE film layer is 70um thick. In this way, the composite sheets of each thickness will not have any quality problems such as bulging and edge swinging.
[0009] A flexible resin printing plate that can be used for printing images and text on the above-mentioned composite sheet structure is provided. The flexible resin printing plate is composed of a plurality of mutually staggered longitudinal image and text plates, specifically five. The working principle of the flexible resin printing plate is as follows: first, a high-adhesion ink is applied to the flexible resin printing plate using an anilox roller, then the flexible resin printing plate is laminated to the inner surface of the outer PE film layer, and finally, pressure is applied by an impression roller to transfer the image and text ink on the flexible resin printing plate to the PE film. The impression roller spans the plurality of longitudinal image and text plates of the flexible resin printing plate. The high-adhesion ink is the Solimax series ink of DIC Color Co., Ltd. Such a flexible resin printing plate containing multiple staggered longitudinal image and text plates can disperse the printing pressure of the impression roller and make the printing pressure uniform everywhere. In combination with the high-adhesion ink, the problem of blurred image and text edges in flexographic printing on the PE film layer can be successfully overcome. The flexographic ink layer set on the inner surface of the PE film layer of the composite sheet structure is printed by the above-mentioned flexible resin printing plate, and the image and text are clear and not blurred.
[0010] Through the above technical solution, the utility model has at least the following beneficial effects:
[0011] The composite sheet structure that can be used for pharmaceutical packaging described in the present application, in which the middle milky white PE film layer can play a whitening effect, can highlight the graphic display effect of the flexographic ink layer, and through the flexible resin printing plate described in the present application, the flexographic ink layer printed on the inner surface of the outer PE film layer has clear graphics and texts without blurring; ultimately, the excellent graphic display effect of the composite sheet is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 Schematic diagram of the disassembly of each layer of a composite sheet material that can be used for pharmaceutical packaging in an embodiment of the present application;
[0013] Figure 2 Schematic diagram of the structure of the misprinted flexible resin printing plate described in the embodiment of the present application;
[0014] Figure 3 Schematic diagram of the structure of a conventional flexible resin printing plate used in the comparative examples of this application. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0016] In the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship are only used for illustrative purposes and cannot be understood as limiting this patent; if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the said features. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.
[0017] In the description of the utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0018] refer to Figure 1 A composite sheet structure that can be used for pharmaceutical packaging, comprising, from the outside to the inside, an outer PE film layer 1, a flexographic ink layer 2, an intermediate milky white PE film layer 3, a first EAA adhesive layer 4, an Al barrier film layer 5, a second EAA adhesive layer 6 and an inner PE film layer 7;
[0019] The flexographic ink layer 2 is arranged on the inner surface of the outer PE film layer 1 by flexographic printing, one side of the intermediate milky white PE film layer 3 is compositely connected to the side of the outer PE film layer 1 provided with the flexographic ink layer 2, and the other side of the intermediate milky white PE film layer 3 is compositely connected to one side of the Al barrier film layer 5 through the first EAA adhesive layer 4, and the other side of the Al barrier film layer 5 is compositely connected to the inner PE film layer 7 through the second EAA adhesive layer 6.
[0020] The middle milky white PE film layer 3 can play a whitening effect and highlight the graphic display effect of the flexographic ink layer 2.
[0021] The thickness of the outer PE film layer 1 is 85-95um, the thickness of the middle milky white PE film layer 3 is 35-45um, the thickness of the first EAA adhesive layer 4 is 25-35um, the thickness of the Al barrier film layer 5 is 25-35um, the thickness of the second EAA adhesive layer 6 is 25-35um, and the thickness of the inner PE film layer 7 is 65-75um.
[0022] In a specific embodiment, the outer PE film layer 1 has a thickness of 90um, the middle milky white PE film layer 3 has a thickness of 40um, the first EAA adhesive layer 4 has a thickness of 30um, the Al barrier film layer 5 has a thickness of 30um, the second EAA adhesive layer 6 has a thickness of 30um, and the inner PE film layer 7 has a thickness of 70um. In this way, the composite sheets of each thickness have no quality problems such as bulging and edge swinging.
[0023] refer to Figure 2 A flexible resin printing plate that can be used for printing images on the composite sheet structure is composed of a plurality of mutually staggered longitudinal image plates 8, specifically five. The working principle of the flexible resin printing plate is as follows: first, a highly adherent ink is applied to the flexible resin printing plate by an anilox roller, then the flexible resin printing plate is laminated to the inner surface of the outer PE film layer 1, and finally, pressure is applied by an impression roller to transfer the image ink on the flexible resin printing plate to the PE film. The impression roller spans the plurality of longitudinal image plates of the flexible resin printing plate. Body 8, the ink with high adhesion fastness is the Solimax series ink of DIC Color Co., Ltd. Such a flexible resin printing plate containing multiple staggered longitudinal graphic plates 8 can disperse the printing pressure of the impression roller and make the printing pressure uniform everywhere. Combined with the ink with high adhesion fastness, it can successfully overcome the problem of blurred edges of graphics and texts in flexographic printing on PE film layers. Through the above-mentioned flexible resin printing plate, the flexographic ink layer 2 printed on the inner surface of the PE film layer of the composite sheet structure has clear graphics and texts without blurring.
[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Based on the present invention and the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A composite sheet structure that can be used for pharmaceutical packaging, characterized in that: From the outside to the inside, it includes an outer PE film layer (1), a flexographic ink layer (2), an intermediate milky white PE film layer (3), a first EAA adhesive layer (4), an Al barrier film layer (5), a second EAA adhesive layer (6) and an inner PE film layer (7); The flexographic ink layer (2) is arranged on the inner surface of the outer PE film layer (1) by flexographic printing, one side of the intermediate milky white PE film layer (3) is compositely connected to the side of the outer PE film layer (1) provided with the flexographic ink layer (2), the other side of the intermediate milky white PE film layer (3) is compositely connected to one side of the Al barrier film layer (5) by a first EAA adhesive layer (4), and the other side of the Al barrier film layer (5) is compositely connected to the inner PE film layer (7) by a second EAA adhesive layer (6).
2. The composite sheet structure for pharmaceutical packaging according to claim 1, characterized in that: The thickness of the outer PE film layer (1) is 85-95um, the thickness of the middle milky white PE film layer (3) is 35-45um, the thickness of the first EAA adhesive layer (4) is 25-35um, the thickness of the Al barrier film layer (5) is 25-35um, the thickness of the second EAA adhesive layer (6) is 25-35um, and the thickness of the inner PE film layer (7) is 65-75um.
3. The composite sheet structure for pharmaceutical packaging according to claim 2, characterized in that: The outer PE film layer (1) has a thickness of 90 μm, the middle milky white PE film layer (3) has a thickness of 40 μm, the first EAA adhesive layer (4) has a thickness of 30 μm, the Al barrier film layer (5) has a thickness of 30 μm, the second EAA adhesive layer (6) has a thickness of 30 μm, and the inner PE film layer (7) has a thickness of 70 μm.
4. A flexible resin printing plate for printing images and texts on the composite sheet structure according to any one of claims 1 to 3, characterized in that: The flexible resin printing plate is composed of a plurality of mutually staggered longitudinal graphic plate bodies (8) spliced together.