Cover plate structure for enhancing adhesive force of printing ink

Abstract

The utility model discloses a cover plate structure for enhancing the adhesive force of printing ink, which comprises a base material layer and a reverse printing ink covering layer, a coupling agent coating is arranged between the base material layer and the reverse printing ink covering layer, and a resin coating is arranged between the coupling agent coating and the reverse printing ink covering layer. According to the cover plate, the coupling agent coating is additionally arranged on the surface of the base material layer, a stable chemical bonding layer can be formed, the chemical bonding force with a reverse covering ink layer is enhanced, the resin coating is coated on the coupling agent coating, the wettability and the adhesive force of the surface are improved, a good middle layer is provided for adhesion of ink, and the service life of the cover plate is prolonged. The adhesive force of the reverse covering ink layer to the base material layer is remarkably improved through the dual effects of the coupling agent coating and the resin coating, and the stability of the coating is ensured.

Description

Technical Field

[0001] This utility model relates to the field of cover plate technology, and in particular to a cover plate structure that enhances ink adhesion. Background Technology

[0002] With the increasing prevalence of smart technology, it is becoming ubiquitous in people's lives. Smart wearable products have been incredibly popular in recent years, with smartwatches and fitness trackers available in a wide variety of styles. They serve not only as fitness devices but also as accessories. As electronic products continue to evolve, the demands for their appearance quality and durability are constantly rising.

[0003] In the prior art, a cover plate with the publication number CN219634852U for preventing the penetration of dissimilar inks includes a cover plate, a first ink layer, a second ink layer, and an anti-penetration layer. The anti-penetration layer can prevent direct contact between the first ink layer and the second ink layer, preventing dissimilar inks from penetrating each other and causing color differences, which would result in poor screen printing effect on the final cover plate. The anti-penetration layer can make the multi-color ink screen printing process more reliable and improve the yield rate of screen-printed cover plates. In the above solution, part of the ink layer is directly applied to the cover plate. However, the poor adhesion of ink on the cover plate of electronic products has always been a prominent problem, which easily leads to ink peeling, fading, and other phenomena, affecting the appearance and service life of the product. Therefore, this utility model discloses a cover plate structure that enhances ink adhesion to solve the above problems. Utility Model Content

[0004] Therefore, it is necessary to provide a cover plate structure that enhances ink adhesion to address the aforementioned technical problems. By sequentially setting a coupling agent coating and a resin coating between the substrate layer and the reverse cover ink layer, the reverse cover ink layer can form a uniform, stable coating with good adhesion on the cover plate surface, thereby enhancing ink adhesion, effectively improving the bonding performance between the cover plate and the ink, improving ink adhesion and durability, and enhancing product quality.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A cover plate structure for enhancing ink adhesion includes a substrate layer and a reverse cover ink layer. A coupling agent coating is disposed between the substrate layer and the reverse cover ink layer, and a resin coating is disposed between the coupling agent coating and the reverse cover ink layer. The coupling agent coating forms a chemically bonded layer on the surface of the substrate layer, and the resin coating further improves wettability and adhesion, thereby enhancing the adhesion between the reverse cover ink layer and the substrate layer.

[0007] In a preferred embodiment of the cover plate structure for enhancing ink adhesion provided by this utility model, the substrate layer includes an invisible area and a visible area, and the reverse cover ink layer is coated on the invisible area.

[0008] In a preferred embodiment of the cover plate structure for enhancing ink adhesion provided by this utility model, the substrate layer is a transparent rigid material or a transparent flexible material.

[0009] In a preferred embodiment of the cover plate structure for enhancing ink adhesion provided by this utility model, the coupling agent coating is a silane coupling agent coating; and the resin coating is an acrylic polyurethane coating.

[0010] As a preferred embodiment of the cover plate structure for enhancing ink adhesion provided by this utility model, the reverse cover ink layer is a black or colored ink layer with a thickness of 8-15μm.

[0011] In a preferred embodiment of the cover plate structure for enhancing ink adhesion provided by this utility model, the thickness of the resin coating is 4-7 μm.

[0012] In a preferred embodiment of the cover plate structure for enhancing ink adhesion provided by this utility model, the coupling agent coating thickness is 0.5-1.0 μm.

[0013] In a preferred embodiment of the cover plate structure for enhancing ink adhesion provided by this utility model, the total thickness of the coupling agent coating, resin coating and reverse ink layer is 12-23 μm.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model's cover plate incorporates a coupling agent coating on the substrate layer surface, forming a stable chemical bonding layer that enhances the chemical adhesion to the reverse cover ink layer. A resin coating applied over the coupling agent coating further improves surface wettability and adhesion, providing a good intermediate layer for ink adhesion. The combined effect of the coupling agent and resin coating significantly enhances the adhesion of the reverse cover ink layer to the substrate layer, ensuring coating stability and strengthening ink adhesion. This effectively improves the bonding performance between the cover plate and the ink, increasing ink adhesion and durability, and ultimately improving product quality. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the invisible and visible areas on the substrate layer provided by this utility model;

[0018] Figure 2 A schematic diagram of the cover plate structure provided by this utility model;

[0019] Figure 3 for Figure 1 Sectional view at point AA;

[0020] Figure 4 A schematic diagram of another cover plate structure provided by this utility model.

[0021] The markings in the diagram are explained as follows:

[0022] 1. Substrate layer; 2. Invisible area; 3. Visible area; 4. Coupling agent coating; 5. Resin coating; 6. Reverse ink layer; 7. Protective film. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] As described in the background section, some ink layers are directly applied to the cover plate. However, poor ink adhesion on the cover plate of electronic products has always been a prominent problem, which can easily lead to ink peeling, fading, and other phenomena, affecting the appearance and service life of the product.

[0025] To solve this technical problem, this utility model provides a cover plate structure that enhances ink adhesion, which is applied in the field of cover plate technology.

[0026] For details, please refer to Figures 1-4A cover plate structure for enhancing ink adhesion includes a substrate layer 1 and a reverse cover ink layer 6. A coupling agent coating 4 is provided between the substrate layer 1 and the reverse cover ink layer 6. A resin coating 5 is provided between the coupling agent coating 4 and the reverse cover ink layer 6. The coupling agent coating 4 forms a chemical bonding layer on the surface of the substrate layer 1. The resin coating 5 improves surface wettability and enhances the adhesion between the reverse cover ink layer 6 and the coupling agent coating.

[0027] This utility model provides a cover plate structure that enhances ink adhesion. A coupling agent coating is added to the surface of the substrate layer, forming a stable chemical bonding layer that strengthens the chemical bond with the reverse cover ink layer. A resin coating is applied over the coupling agent coating to improve surface wettability and adhesion, providing a good intermediate layer for ink adhesion. The combined effect of the coupling agent coating and the resin coating significantly improves the adhesion of the reverse cover ink layer to the substrate layer, ensuring coating stability and enhancing ink adhesion. This effectively improves the bonding performance between the cover plate and the ink, increasing ink adhesion and durability, and ultimately improving product quality.

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] Please refer to Figures 1-4 A cover plate structure for enhancing ink adhesion includes a substrate layer 1 and a reverse cover ink layer 6. A coupling agent coating 4 is disposed between the substrate layer 1 and the reverse cover ink layer 6, and a resin coating 5 is disposed between the coupling agent coating 4 and the reverse cover ink layer 6. The coupling agent coating 4 is applied to the substrate layer 1 to form a stable chemical bonding layer on the surface of the substrate layer 1, enhancing the chemical bonding force with the reverse cover ink layer 6. The resin coating 5 is applied on the coupling agent coating 4 to improve surface wettability and adhesion, providing a good intermediate layer for ink adhesion. The dual effect of the coupling agent coating 4 and the resin coating 5 significantly improves the adhesion of the reverse cover ink layer 6 to the substrate layer 1, ensuring coating uniformity and stability, enhancing ink adhesion, effectively improving the bonding performance between the cover plate and the ink, improving ink adhesion and durability, and improving product quality.

[0032] The substrate layer 1 is made of a transparent rigid material such as glass, or it can be a transparent flexible material. The side of the substrate layer 1 includes an invisible area 2 and a visible area 3. The reverse cover ink layer 6 is coated on the invisible area 2, which allows for the setting of different shapes of the invisible area 2 according to requirements. The invisible area 2 is set around the outer ring of the visible area 3, which can better display the pattern of the reverse cover ink layer 6. In this example, the cover structure is a display cover. The reverse cover ink layer 6 is coated with black ink to achieve a light-blocking effect. Other colored inks can also be used for coating.

[0033] It is worth mentioning that the coupling agent coating 4 is coated with a silane coupling agent, which is selected from at least one of aminosilane and epoxysilane, such as γ-aminopropyltriethoxysilane. The coating amount is 110-130 g / m². The silane coupling agent is dissolved in a suitable solvent to prepare a solution with a concentration of 50-70%. The coupling agent is fully dissolved and uniformly dispersed by stirring, ultrasonication, etc. It is coated on the substrate layer by spraying, dipping, brushing, etc. Then, it is cured at a certain temperature (such as 80℃-90℃) for 1-2 minutes, so that the silane coupling agent forms a stable chemical bond layer on the surface of the cover plate substrate layer, which enhances the chemical bonding force with the ink, thus obtaining the coupling agent coating with a thickness of 0.5-1.0 μm.

[0034] It is worth noting that the solution preparation and coating process of the coupling agent coating 4 are conventional methods, and this utility model has not improved them, so they will not be described in detail here.

[0035] Resin coating 5 is an acrylic polyurethane coating, which is applied to the cured coupling agent coating using methods such as spraying, dipping, or brushing, followed by drying to obtain the resin coating, with a thickness selected from 4-7 μm. This resin coating improves surface wettability and adhesion, providing a good intermediate layer for ink adhesion. It is worth noting that the acrylic polyurethane coating and coating process are existing conventional methods, and this invention does not improve upon them, so they will not be described in detail here.

[0036] The reverse ink layer 6 is coated using screen printing or inkjet printing, employing conventional printing processes such as screen printing and inkjet printing. Curing is achieved using ultraviolet curing or thermal curing to ensure the ink evenly covers the surface of the substrate layer 1. After printing, drying or curing is performed according to the ink's curing requirements to form a strong bond between the ink and the coating, further improving the ink's adhesion and durability. The coupling agent coating 4 has a thickness of 0.5-1.0 μm, the resin coating 5 has a thickness of 4-7 μm, and the reverse ink layer 6 has a thickness of 8-15 μm. The total thickness of the coupling agent coating 4, resin coating 5, and reverse ink layer 6 is 12-23 μm.

[0037] like Figure 4As shown, the surface of the reverse ink layer 6 is provided with a UV-curable or heat-curable protective film 7, and the thickness of the protective film 7 is 2-5μm. The protective film 7 is a UV-curable protective film, such as polyurethane acrylate (PUA) or epoxy acrylate (EA), which has high transparency, fast curing characteristics, and high light transmittance, and is used to protect the reverse ink layer 6 from being contaminated or worn.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A cover plate structure for enhancing ink adhesion, characterized in that, It includes a substrate layer and a reverse ink layer, wherein a coupling agent coating is provided between the substrate layer and the reverse ink layer, and a resin coating is provided between the coupling agent coating and the reverse ink layer.

2. The cover plate structure according to claim 1, wherein The substrate layer includes an invisible area and a visible area, and the reverse ink layer is coated on the invisible area.

3. The cover plate structure according to claim 1, wherein The substrate layer is a transparent rigid material or a transparent flexible material.

4. The cover plate structure according to claim 1, wherein The coupling agent coating is a silane coupling agent coating; the resin coating is an acrylic polyurethane coating.

5. The cover plate structure according to claim 1, wherein The reverse cover ink layer is a black or colored ink layer.

6. The cover plate structure according to claim 1, wherein The thickness of the reverse overprint ink layer is 8-15μm.

7. The cover plate structure according to claim 6, wherein The thickness of the resin coating is 4-7 μm.

8. The cover plate structure for enhancing ink adhesion according to claim 7, characterized in that, The coupling agent coating thickness is 0.5-1.0 μm.

9. The cover plate structure according to claim 8, wherein The total thickness of the coupling agent coating, resin coating, and reverse ink layer is 12-23 μm.

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