Folding cover plate glass

Abstract

The invention discloses folding cover plate glass, which comprises a folding cover plate glass main body, the upper surface and the lower surface of the folding cover plate glass main body are respectively a half-broken etching surface and an unetched glass surface, the half-broken etching surface is etched with a groove in a bending area of the folding cover plate glass main body, and the distance between the bottommost part of the groove and the unetched glass surface is 10-100 [mu] m. According to the invention, the half-breaking etching process is adopted in the bending area of the cover plate glass with the thickness of more than 0.1 mm to form the groove with a specific shape, so that the glass cover plate can have excellent bending performance while the hardness and the strength of the cover plate glass are ensured, and the problem that the bending area of the folding cover plate glass is fragile when being impacted by external force is solved.

Description

Technical Field

[0001] The invention relates to the technical field of glass half-breaking technology, and in particular to a folding cover glass. Background Art

[0002] Folding cover glass is a glass material with ultra-thin folding area, wear resistance, high temperature resistance, high light transmittance, bendability and good resilience. It is widely used in 3C consumer products such as folding mobile phones and folding tablets. Because of its ultra-thinness (25~100μm), this kind of glass cannot be used as the outermost layer of the touch screen of folding electronic products. It generally needs to be protected with polymer film materials to improve the impact resistance of the folding cover glass. The above-mentioned folding cover glass design loses the original excellent touch experience of glass for consumers, so the plastic touch is still a major defect of the folding cover. Summary of the invention

[0003] The purpose of the present invention is to provide a folding cover glass in view of the deficiencies in the prior art. A semi-interrupted etching process is adopted in the bending zone of the cover glass with a thickness of more than 0.1 mm to form a groove with a specific morphology. While ensuring the hardness and strength of the cover glass, the glass cover can have excellent bending performance, thereby solving the problem that the folding cover glass is fragile when subjected to external force impact after being bent.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

[0005] A folding cover glass comprises a folding cover glass body, wherein the upper and lower surfaces of the folding cover glass body are respectively a semi-etched surface and an unetched glass surface, wherein the semi-etched surface is etched with a groove in a bending area of ​​the folding cover glass body, and the distance between the bottom of the groove and the unetched glass surface is 10-100 μm.

[0006] Specifically, the cross-sectional shape of the groove is one or two of a comb shape, a wedge shape, and an arc shape.

[0007] Preferably, the interior of the groove and the surface of the half-etched surface are also filled with a flexible transparent polymer material.

[0008] Furthermore, the flexible transparent polymer material is one or two of acrylic polymer, silicone resin, epoxy resin and polyurethane resin.

[0009] In the above technical solution, the width of the groove is 0.02~5mm; the thickness of the folding cover glass body is 0.1~0.5mm; and the symmetry axis of the groove cross-sectional figure is perpendicular to the half-etched surface.

[0010] Preferably, the refractive index of the flexible transparent polymer material is 1.50-1.53, the transmittance is greater than 90%, the haze is less than 0.5%, and the elongation at break of the flexible transparent polymer material after curing is greater than 10%.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a semi-interrupted etching process in the bending area of ​​the cover glass with a thickness of more than 0.1 mm to form a groove with a specific morphology. While ensuring the hardness and strength of the cover glass, the glass cover can have excellent bending performance, thereby solving the problem that the folded cover glass is fragile when subjected to external force impact after being bent.

[0012] The folding cover glass of the present invention adopts a half-break groove process, the groove direction is perpendicular to the half-break etching surface, and the morphology design of the groove can ensure smooth exhaust of gas during the filling process of the polymer material, thereby achieving a better coating effect.

[0013] The invention adopts a flexible transparent polymer material to fill the grooved part on the half-etched surface, so as to provide a flat surface for subsequent coating processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the folding cover glass of the present invention.

[0015] Figure 2 It is a cross-sectional schematic diagram of the folded cover glass when the groove cross section of the present invention is comb-shaped; Figure 3 It is a cross-sectional schematic diagram of the folded cover glass when the groove cross section of the present invention is wedge-shaped; Figure 4 It is a cross-sectional schematic diagram of the folded cover glass when the groove cross section of the present invention is arc-shaped; Figure 5 It is a schematic cross-sectional view of the folded cover glass when the groove cross section of the present invention is a mixture of two patterns; Figure 6 It is a cross-sectional schematic diagram of the folding cover glass groove after the flexible polymer material is filled in the groove of the folding cover glass of the present invention.

[0016] In the figure: 1. Folding cover glass body; 2. Half-etched surface; 3. Unetched glass surface; 4. Groove; 5. Flexible polymer material. DETAILED DESCRIPTION

[0017] In order to better reflect the advantages and innovations of the present invention and clearly demonstrate the technical solution of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments. Example

[0018] like Figure 1As shown, the present invention provides a folding cover glass, including a folding cover glass body 1, wherein the upper and lower surfaces of the folding cover glass body 1 are respectively a semi-etched surface 2 and an unetched glass surface 3, and the semi-etched surface 2 is etched with a groove 4 in the bending area of ​​the folding cover glass body 1, and the distance between the bottom of the groove 4 and the unetched glass surface 3 is 10~100μm.

[0019] like Figure 2-Figure 5 As shown, the cross-sectional shape of the groove 4 is one or two of a comb shape, a wedge shape, and an arc shape.

[0020] like Figure 6 As shown, the interior of the groove 4 and the surface of the half-etched surface 2 are also filled with a flexible transparent polymer material 5; the groove 4 can ensure smooth discharge of gas during the filling process of the flexible polymer material 5, thereby achieving a better coating effect.

[0021] In this embodiment, the flexible transparent polymer material 5 is one or two of acrylic polymer, silicone resin, epoxy resin, and polyurethane resin.

[0022] In this embodiment, the width of the groove 4 is 0.02-5 mm; the thickness of the folding cover glass body 1 is 0.1-0.5 mm; and the symmetry axis of the cross-sectional figure of the groove 4 is perpendicular to the half-etched surface 2 .

[0023] It should be noted that, unlike the traditional folding cover glass which reduces the thickness of the cover glass in order to pursue bending performance, in this embodiment, a half-break etching process is used on the cover glass with a thickness of more than 0.1 mm to etch a half-break groove in the bending area of ​​the cover glass. While ensuring the strength and hardness of the cover glass, it still has excellent bending performance with a maximum bending radius of R <1.0mm, and it can be statically bent 200,000 times without breakage.

[0024] In this embodiment, the refractive index of the flexible transparent polymer material 5 is 1.50-1.53, the transmittance is greater than 90%, the haze is less than 0.5%, and the elongation at break of the flexible transparent polymer material 5 after curing is greater than 10%.

[0025] In summary, the present invention adopts a semi-interrupted etching process in the bending area of ​​the cover glass with a thickness of more than 0.1 mm to form a groove with a specific morphology. While ensuring the hardness and strength of the cover glass, the glass cover can have excellent bending performance, thereby solving the problem that the folded cover glass is fragile when subjected to external force impact after being bent.

[0026] It should be understood that the above description of the preferred embodiment is relatively detailed and cannot be regarded as limiting the scope of patent protection of the present invention. Under the enlightenment of the present invention, ordinary technicians in this field can also make substitutions or modifications without departing from the scope of protection of the claims of the present invention, which all fall within the scope of protection of the present invention. The scope of protection requested for the present invention shall be based on the attached claims.

Claims

1. A folding cover glass, characterized in that: The folding cover glass body (1) comprises a folding cover glass body (1), wherein the upper and lower surfaces of the folding cover glass body (1) are respectively a semi-etched surface (2) and an unetched glass surface (3), wherein the semi-etched surface (2) is etched with a groove (4) in a bending area of ​​the folding cover glass body (1), and the distance between the bottom of the groove (4) and the unetched glass surface (3) is 10 to 100 μm.

2. The folding cover glass according to claim 1, characterized in that: The cross-sectional shape of the groove (4) is one of a comb shape, a wedge shape, and an arc shape, or a mixture of two or more shapes.

3. The folding cover glass according to claim 1, characterized in that: The interior of the groove (4) and the surface of the half-etched surface (2) are also filled with a flexible transparent polymer material (5).

4. The folding cover glass according to claim 3, characterized in that: The flexible transparent polymer material (5) is one or two of acrylic polymers, silicone resins, epoxy resins, and polyurethane resins.

5. The folding cover glass according to claim 1, characterized in that: The width of the groove (4) is 0.02-5 mm.

6. The folding cover glass according to claim 1, characterized in that: The folding cover glass body (1) has a thickness of 0.1-0.5 mm.

7. The folding cover glass according to claim 1, characterized in that: The symmetry axis of the cross-sectional figure of the groove (4) is perpendicular to the half-etched surface (2).

8. The folding cover glass according to claim 4, characterized in that: The refractive index of the flexible transparent polymer material (5) is 1.50-1.53, the light transmittance is greater than 90%, the haze is less than 0.5%, and the elongation at break of the flexible transparent polymer material (5) after curing is greater than 10%.

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