An ultrathin flexible glass cover plate structure

Abstract

The utility model belongs to the ultra -thin flexible glass technical field's ultra -thin flexible glass cover plate structure. Including glass layer (1), back coating (2), back coating (2) sets up in glass layer (1) one side surface, and back coating (2) is polyurethane resin back coating or epoxy resin back coating or polymethyl methacrylate back coating. The glass layer (1) other side surface set up buffer layer (3), and buffer layer (3) other side surface set up hardening layer (4). Ultra -thin flexible glass cover plate structure disclosed by the utility model, simple structure, through the double -sided coating of glass layer, not only effectively reduces the adverse effect that the broken cover plate structure has to the lower layer's module structure, and can make the cover plate structure have higher impact resistance and explosion -proof performance, improve the overall performance.

Description

Technical Field

[0001] This utility model belongs to the field of ultra-thin flexible glass technology, and more specifically, it relates to an ultra-thin flexible glass cover structure. Background Technology

[0002] With the rapid development of the electronic display industry, smartphones are evolving towards dual-screen or multi-screen designs, saving more space, making them more portable, and better meeting consumer needs through folding or rolling mechanisms. At the same time, ultra-thin flexible glass faces significant challenges, placing higher demands on the phone's cover glass. On one hand, the cover glass needs sufficient flexibility to fold or roll in any direction without developing creases after prolonged bending, ensuring optimal display quality. On the other hand, it needs extremely high strength to withstand strong external impacts, preventing damage to the flexible display device. Currently, most flexible display covers for foldable displays on the market are made of flexible plastic. While plastic covers offer good toughness and generally meet folding requirements, their mechanical properties limit their susceptibility to scratches and drops, failing to provide adequate protection for the display. Furthermore, repeated folding can lead to deformation and screen defects such as ripples. Conventional rigid cover glass, on the other hand, has poor bendability, hindering the bending of flexible displays. Currently, the coating of ultra-thin flexible glass is mainly processed on one side to improve surface hardness, wear resistance and impact resistance. However, when the impact force is too large, the ultra-thin flexible glass will break, which will have an adverse effect on the underlying module structure.

[0003] Existing technology includes a technology entitled "A Composite Coating for Ultra-Thin Flexible Glass Surface and a Glass Cover Plate," with publication number CN119552565A. This technology provides a composite coating for ultra-thin flexible glass surfaces, comprising a composite buffer layer and a hardening layer. The hardening layer material includes a functional resin, a photoinitiator, and a solvent; the composite buffer layer material includes a functional resin, resin monomers, active monomers, a photoinitiator, and a solvent. A glass cover plate is also provided, comprising ultra-thin flexible glass and a composite coating applied to its surface; the composite buffer layer in the composite coating covers the flexible glass surface. This invention, through the design of the coating structure and composition, reduces the number of coating layers compared to multilayer structures, lowers the coating shrinkage rate, and improves the mechanical properties of the product.

[0004] However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an ultra-thin flexible glass cover structure that, in view of the shortcomings of the prior art, has a simple structure and, through double-sided coating of the glass layer, not only effectively reduces the adverse effects of the cover structure breaking on the underlying module structure, but also enables the cover structure to have higher impact resistance and explosion-proof performance, thereby improving the overall performance.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model is an ultra-thin flexible glass cover structure, including a glass layer and a back coating layer. The back coating layer is disposed on one side surface of the glass layer and is a polyurethane resin back coating layer, an epoxy resin back coating layer, or a polymethyl methacrylate back coating layer.

[0008] A buffer layer is provided on the other side surface of the glass layer, and a hardening layer is provided on the other side surface of the buffer layer.

[0009] The buffer layer is a polyurethane resin buffer layer, an epoxy resin buffer layer, or a polymethyl methacrylate buffer layer.

[0010] The hardened layer is a polyurethane resin hardened layer, an epoxy resin hardened layer, or a polymethyl methacrylate hardened layer.

[0011] When the buffer layer and hardening layer are disposed on the other side of the glass layer, the other side of the glass layer is attached to the base plate with double-sided adhesive. The base plate is a glass base plate, a PET base plate, or a PP base plate.

[0012] When the back coating is applied to one side of the glass layer, the hardened layer on the other side of the glass layer is attached to the base plate with double-sided adhesive. The base plate can be a glass base plate, a PET base plate, or a PP base plate.

[0013] The double-sided adhesive is AB double-sided adhesive, UV double-sided adhesive, or PU double-sided adhesive.

[0014] The back coating of the ultra-thin flexible glass cover structure has a protective film pasted on one side of the outer surface, and the hardening layer has a protective film pasted on one side of the outer surface.

[0015] The glass layer, back coating layer, buffer layer, and hardening layer of the ultra-thin flexible glass cover structure have the same shape. The glass layer is UTG.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] The ultra-thin flexible glass cover structure of this utility model involves the following steps: after the glass layer is formed, a buffer layer is first coated on the other side of the glass layer to form a buffer layer, then a hardening layer is coated on the buffer layer, and finally a back coating layer is coated on one side of the glass layer, achieving separate coating on both sides of the glass layer. The back coating is applied using methods such as slot coating, spraying, spin coating, and scraping to apply the back coating material to one side of the glass layer. Similarly, the buffer layer is applied using the same methods, and the hardening layer is applied using the same methods to apply the hardening layer material to the buffer layer. This separate coating on both sides of the glass layer effectively protects the glass, significantly reducing the adverse effects of cover structure breakage on the underlying module structure, and also giving the cover structure higher impact resistance and explosion-proof performance. Attached Figure Description

[0018] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0019] Figure 1 This is a schematic diagram of the ultra-thin flexible glass cover structure described in this utility model;

[0020] Figure 2 This is a schematic diagram of the ultra-thin flexible glass cover structure described in this utility model;

[0021] Figure 3 This is a schematic diagram of the ultra-thin flexible glass cover structure described in this utility model;

[0022] The labels in the attached diagram are as follows: 1. Glass layer; 2. Back coating layer; 3. Buffer layer; 4. Hardening layer; 5. Base plate. Detailed Implementation

[0023] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0024] As attached Figure 1 - Appendix Figure 3As shown, this utility model is an ultra-thin flexible glass cover structure, including a glass layer 1 and a back coating layer 2. The back coating layer 2 is disposed on one side surface of the glass layer 1, and the back coating layer 2 is a polyurethane resin back coating layer, an epoxy resin back coating layer, or a polymethyl methacrylate back coating layer. A buffer layer 3 is disposed on the other side surface of the glass layer 1, and a hardening layer 4 is disposed on the other side surface of the buffer layer 3. To address the shortcomings of the prior art, an improved technical solution is proposed. After the glass layer 1 is formed, a buffer layer 3 is first coated on the other side of the glass layer 1 to form a buffer layer 3, then a hardening layer 4 is coated on the buffer layer 3, and finally the back coating layer 2 is coated on one side of the glass layer 1, thus achieving separate coating on both sides of the glass layer 1. When applying the back coating 2, various coating methods such as slot coating, spraying, spin coating, and scraping are used to apply the back coating material to one side of the glass layer 1. Similarly, when applying the buffer layer 3, the same methods are used to apply the buffer layer material to the surface of the glass layer 1. Finally, when applying the hardening layer 4, the same methods are used to apply the hardening layer 4 material to the surface of the buffer layer 3. In this way, coatings are formed on both sides of the glass layer, effectively protecting the glass and reducing the adverse effects of cover plate breakage on the underlying module structure. Furthermore, this results in higher impact resistance and explosion-proof performance for the cover plate structure. The ultra-thin flexible glass cover plate structure described in this invention is simple in structure. Through double-sided coating of the glass layer, it not only effectively reduces the adverse effects of cover plate breakage on the underlying module structure but also enhances the cover plate structure's impact resistance and explosion-proof performance, improving overall performance.

[0025] The buffer layer 3 is a polyurethane resin buffer layer, an epoxy resin buffer layer, or a polymethyl methacrylate buffer layer. After the buffer layer 3 is coated, a curing step is required. Curing methods include room temperature, high temperature, or ultraviolet light curing to ensure the curing effect.

[0026] The hardening layer 4 is a polyurethane resin hardening layer, an epoxy resin hardening layer, or a polymethyl methacrylate hardening layer. After the hardening layer 4 is applied, a curing step is required. Curing methods include room temperature, high temperature, or ultraviolet curing to ensure the curing effect.

[0027] When the buffer layer 3 and the hardening layer 4 are disposed on the other side of the glass layer 1, the other side of the glass layer 1 is adhered to the base plate 5 using double-sided adhesive. The base plate 5 is a glass base plate, a PET base plate, or a PP base plate. In the above structure, after the glass layer is processed and formed, the other side of the glass layer is first adhered to the base plate before applying the buffer layer and the hardening layer to facilitate the application and formation of the buffer layer and the hardening layer. The buffer layer is applied first, then cured, followed by the application of the hardening layer, and then cured again.

[0028] When the back coating 2 is applied to one side of the glass layer 1, the hardened layer 4 on the other side of the glass layer 1 is adhered to the base plate 5 using double-sided adhesive. The base plate 5 can be a glass base plate, a PET base plate, or a PP base plate. In this structure, when applying the back coating, the hardened layer of the glass layer is first adhered to the base plate using double-sided adhesive, which then facilitates the application of the back coating to the upper side.

[0029] The double-sided adhesive is an AB double-sided adhesive, a UV double-sided adhesive, or a PU double-sided adhesive. With this structure, the double-sided adhesive reliably achieves bonding of different layers, and is also easy to clean.

[0030] The back coating 2 of the ultra-thin flexible glass cover structure has a protective film adhered to one side of its outer surface, and the hardening layer 4 also has a protective film adhered to one side of its outer surface. In this structure, the protective film is applied through a lamination step. The protective film is made of PET or PE film material. The main function of the protective film is to prevent foreign objects from falling onto the product surface and damaging it, thereby improving product yield.

[0031] The glass layer 1, back coating layer 2, buffer layer 3, and hardening layer 4 of the ultra-thin flexible glass cover structure have the same shape. The glass layer 1 is UTG. In the above structure, the back coating layer, buffer layer, and hardening layer are larger than the glass layer, i.e., they have an extended coating, which can better protect the edges of the UTG and improve the edge impact resistance.

[0032] The manufacturing process of the ultra-thin flexible glass cover structure is as follows: base bonding → buffer layer coating → curing → hardening layer coating → cutting and peeling → secondary base bonding → back coating → curing → cutting and peeling → lamination and shipment. Specifically, during manufacturing, the base bonding involves attaching the cleaned glass layer to the surface of the base plate 5 using double-sided adhesive. The base plate 5 can be made of glass, PET, or PP. The double-sided adhesive can be AB, UV, PU, ​​or other types. The buffer layer coating involves applying the buffer layer material to the glass surface using methods such as slot coating, spraying, spin coating, or scraping. The buffer layer material is initially a liquid adhesive, and its types include, but are not limited to, polyurethane resin, epoxy resin, or polymethyl methacrylate. The hardening layer coating is applied to the surface of the buffer layer using methods such as slot coating, spraying, spin coating, and blade coating. The hardening layer material is a liquid adhesive before coating, and its types include, but are not limited to, polyurethane resin, epoxy resin, or polymethyl methacrylate. After the buffer layer and hardening layer are formed and cured, a cutting step is performed. Generally, infrared, ultraviolet, or CO2 laser cutting machines are used to separate the coated ultrathin glass from the edge film layer, which facilitates the next step of peeling, reduces the probability of breakage during peeling, and improves product yield. The secondary backing involves attaching the glass layer, after the buffer layer and hardening layer have been applied, to the surface of the base plate using double-sided adhesive. The base plate material can be glass, PET, PP, etc.; the double-sided adhesive can be AB, UV, PU, ​​etc.; the back coating is applied to the surface of the glass layer using methods such as slot coating, spraying, spin coating, or scraping. The back coating material is a liquid adhesive substance before the back coating is applied, and the types include polyurethane resin, epoxy resin, or polymethyl methacrylate.

[0033] The ultra-thin flexible glass cover structure of this invention involves first coating a buffer layer 3 on one side of the glass layer 1, then coating the buffer layer 3 with a hardening layer 4, and finally coating one side of the glass layer 1 with a back coating layer 2, thus achieving coating on both sides of the glass layer 1. The back coating layer 2 is applied using methods such as slot coating, spraying, spin coating, and scraping to coat one side of the glass layer 1. Similarly, the buffer layer 3 is applied using the same methods, and the hardening layer 4 is applied using the same methods to coat the surface of the buffer layer 3. This method of coating both sides of the glass layer effectively protects the glass, reduces the adverse effects of cover structure breakage on the underlying module structure, and provides the cover structure with higher impact resistance and explosion-proof performance.

[0034] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A structure for an ultrathin flexible glass cover, characterized in that: It includes a glass layer (1) and a back coating layer (2). The back coating layer (2) is disposed on one side surface of the glass layer (1). The back coating layer (2) is a polyurethane resin back coating layer, an epoxy resin back coating layer, or a polymethyl methacrylate back coating layer.

2. The ultra-thin flexible glass cover structure according to claim 1, characterized in that: A buffer layer (3) is provided on the other side surface of the glass layer (1), and a hardening layer (4) is provided on the other side surface of the buffer layer (3).

3. The ultra-thin flexible glass cover structure according to claim 2, characterized in that: The buffer layer (3) is a polyurethane resin buffer layer, an epoxy resin buffer layer, or a polymethyl methacrylate buffer layer.

4. The ultra-thin flexible glass cover structure according to claim 2 or 3, characterized in that: The hardened layer (4) is a polyurethane resin hardened layer, an epoxy resin hardened layer, or a polymethyl methacrylate hardened layer.

5. The ultra-thin flexible glass cover structure according to claim 4, characterized in that: When the buffer layer (3) and hardening layer (4) are placed on the other side of the glass layer (1), the other side of the glass layer (1) is attached to the base plate (5) by double-sided adhesive. The base plate (5) is a glass base plate, a PET base plate, or a PP base plate.

6. The ultra-thin flexible glass cover structure according to claim 1, characterized in that: When the back coating (2) is applied to one side of the glass layer (1), the hardened layer (4) on the other side of the glass layer (1) is attached to the base plate (5) with double-sided adhesive. The base plate (5) is a glass base plate, a PET base plate, or a PP base plate.

7. The ultra-thin flexible glass cover structure according to claim 5 or 6, characterized in that: The double-sided adhesive is AB double-sided adhesive, UV double-sided adhesive, or PU double-sided adhesive.

8. The ultra-thin flexible glass cover structure according to claim 2 or 3, characterized in that: The back coating (2) of the ultra-thin flexible glass cover structure is attached with a protective film on one side of the outer surface, and the hardening layer (4) is attached with a protective film on one side of the outer surface.

9. The ultrathin flexible glass cover structure according to claim 2 or 3, characterized in that: The glass layer (1), back coating layer (2), buffer layer (3), and hardening layer (4) of the ultra-thin flexible glass cover structure have the same shape and size.

10. The ultrathin flexible glass cover structure according to claim 1 or 2, characterized in that: The glass layer (1) is UTG.

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