WO2019076283A1

WO2019076283A1 - Combined reagent, method for manufacturing curved glass sheet, and electronic device

Info

Publication number: WO2019076283A1
Application number: PCT/CN2018/110377
Authority: WO
Inventors: 杨光明
Original assignee: Oppo广东移动通信有限公司
Priority date: 2017-10-18
Filing date: 2018-10-16
Publication date: 2019-04-25
Also published as: CN107879638A; CN107879638B

Abstract

A combined reagent, a method for manufacturing a curved glass sheet, and an electronic device. The combined reagent for manufacturing a curved glass sheet comprises: a first etching liquid and a second etching liquid. The first etching liquid and the second etching liquid each separately comprises: 25-55 wt% of hydrofluoric acid; 6-25 wt% of nitric acid; 15-45 wt% of phosphoric acid; 0-25 wt% of acetic acid; and 0-25 wt% of sulfuric acid.

Description

Combined reagent, method for preparing curved glass sheet, and electronic device

Priority information

The present application claims priority to and the benefit of the patent application Serial No. PCT Application No.

Technical field

The present application relates to the field of sheet surface processing, and in particular to a combination of reagents, a method of preparing a curved glass sheet, and an electronic device.

Background technique

With the improvement of consumption level, consumers not only pursue the diversification of functions of electronic products, but also have higher and higher requirements for their appearance and texture. At present, glass materials have been widely used in the electronic device market, for example, thin flat glass is widely used for making electronic device casings. With the development of glass sheet manufacturing technology, the surface of the thin flat glass can have a beautiful texture effect, which greatly enriches the appearance of electronic equipment. In recent years, with the development of curved surface display technology, curved glass as a curved screen has also begun to be applied.

However, the current methods and electronic devices for preparing curved glass sheets have yet to be improved.

Summary of the invention

The present application proposes a combination reagent for preparing a curved glass sheet. The combined reagent includes: a first etching liquid; and a second etching liquid, wherein the first etching liquid and the second etching liquid respectively comprise: 25 to 55 wt% of hydrofluoric acid; ～25 wt% of nitric acid; 15 to 45 wt% of phosphoric acid; 0 to 25 wt% of acetic acid; and 0 to 25 wt% of sulfuric acid. Thus, by using the combined reagent, stepwise etching of the glass can be achieved, thereby easily forming a plurality of textured surfaces on the glass, thereby allowing the etched glass sheet to have a three-dimensional texture.

In another aspect of the present application, the present application provides a method of making a curved glass sheet using the combination of reagents previously described. According to an embodiment of the present application, the method includes: etching a flat glass plate by using the first etching liquid and the second etching liquid, respectively, to form a first textured surface on the flat glass plate and a second textured surface; and bending the planar glass sheet. Therefore, the method can realize the hierarchical three-dimensional texture on the curved glass plate, which greatly enriches the appearance effect of the curved glass.

In another aspect of the application, the application proposes an electronic device. According to an embodiment of the present application, the electronic device includes: a body; and a housing, at least a portion of which is made of a curved glass sheet prepared by the method described above. Therefore, the electronic device has all the features and advantages of the curved glass plate prepared by the method described above, and details are not described herein again. In general, the housing of the electronic device has a layered three-dimensional texture with a rich appearance.

DRAWINGS

1 shows a flow chart of a method of preparing a curved glass sheet according to an embodiment of the present application;

2 shows a flow chart of a portion of a method of preparing a curved glass sheet according to an embodiment of the present application;

3 is a partial structural view showing a curved glass sheet according to an embodiment of the present application;

4 is a partial structural view showing a curved glass sheet according to another embodiment of the present application;

Figure 5 is a cross-sectional view showing a portion of a curved glass sheet according to an embodiment of the present application;

6 shows a flow chart of a portion of a method of preparing a curved glass sheet according to another embodiment of the present application;

Figure 7 is a schematic cross-sectional view showing a curved glass sheet according to an embodiment of the present application;

FIG. 8 shows a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of the reference signs:

100: flat glass plate; 110: first textured surface; 120: second textured surface; 10: curved surface; 20: overlapping portion; 200: housing; 1000: electronic device.

Detailed ways

The embodiments of the present application are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative only, and are not to be construed as limiting.

It should be noted that the features and effects described in the various aspects of the present application may be applied to each other, and are not described herein again.

This application is based on the applicant's discovery and knowledge of the following facts and issues:

At present, the appearance effect is achieved on the curved glass mainly by the surface modification method. Specifically, the surface modification method includes an inkjet method or a film coating method, and the surface effects produced by these methods are mostly a flat effect of color and gloss. Therefore, if a process can be provided to make the curved glass have a layered three-dimensional texture, it will greatly enrich the appearance of the curved glass.

In one aspect of the present application, the present application proposes a combination reagent for preparing a curved glass sheet. According to an embodiment of the present application, the combined reagent includes: a first etching liquid; and a second etching liquid, wherein the first etching liquid and the second etching liquid may independently include: 25 to 55 wt% of hydrogen Fluoric acid; 6 to 25 wt% of nitric acid; 15 to 45 wt% of phosphoric acid; 0 to 25 wt% of acetic acid; and 0 to 25 wt% of sulfuric acid. According to an embodiment of the present application, the first etching liquid and the second etching liquid are respectively placed in two independent closed containers. By using the combined reagent, stepwise etching of the glass can be realized, thereby forming a plurality of textured surfaces on the glass easily, so that the etched glass sheet has a three-dimensional texture visual effect.

For the convenience of understanding, the following is a brief description of the principle of preparing a curved glass plate by using the above-mentioned combined reagents: currently, an etching solution for preparing a curved glass plate by a wet etching process is generally capable of being etched to form a layer of fog. The problem of the surface, which in turn leads to the use of a curved glass sheet formed by wet etching, makes it difficult to obtain a three-dimensional texture. With the combination reagent according to the embodiment of the present application, the glass plate material can be stepwise etched by using the first etching liquid and the second etching liquid to form two different matte structures. Combined with the transparent nature of the glass material itself, a three-dimensional texture structure formed by superimposing two layers of matte surface can be obtained. The composition of the first etching liquid and the second etching liquid may be the same or different. When the first etching liquid composition is the same, two different textured surfaces can be obtained on the same glass sheet by controlling the etching parameters and the etching area.

According to an embodiment of the present application, the composition of the first etching liquid and the second etching liquid may be different. Specifically, one of the first etching liquid and the second etching liquid may include: 25 to 45 wt% of hydrofluoric acid; 6 to 25 wt% of nitric acid; 15 to 35 wt% of phosphoric acid; and 5 to 25 wt% of acetic acid. . According to an embodiment of the present application, the other of the first etching liquid and the second etching liquid may include: 35 to 55 wt% of hydrofluoric acid; 6 to 25 wt% of nitric acid; 25 to 45 wt% of phosphoric acid; ~25 wt% sulfuric acid. The first etching liquid and the second etching liquid having the above composition can realize different depth etching on the same glass plate, thereby forming two textured surfaces having different depths, thereby obtaining a curved glass having a three-dimensional texture effect. Plate.

According to an embodiment of the present application, when the first etching liquid is an aqueous solution, the first etching liquid may include: 30-40% by weight of hydrofluoric acid; 10-20% by weight of nitric acid based on the total mass of the first etching liquid. 20 to 30 wt% of phosphoric acid; and 10 to 25 wt% of acetic acid; when the second etching solution is an aqueous solution, the second etching solution may include: 40 to 50 wt% of hydrogen based on the total mass of the second etching solution Fluoric acid; 10 to 20% by weight of nitric acid; 30 to 40% by weight of phosphoric acid; and 10 to 20% by weight of acetic acid. The etching liquid prepared by using water as a solvent is not only low in cost but also good in fluidity, and is easy to be cleaned after forming a textured surface. Thereby, the curved glass plate having the hierarchical three-dimensional texture can be easily produced, and the appearance effect of the curved glass is greatly enriched.

In another aspect of the present application, the present application provides a method of making a curved glass sheet using the combination of reagents previously described. According to an embodiment of the present application, referring to FIG. 1, the method includes:

S100: first etching solution etching treatment

According to an embodiment of the present application, in this step, the first etching liquid etching process is performed on the flat glass plate to form a first textured surface on the flat glass plate. According to the embodiment of the present application, the shape, size, and thickness of the flat glass plate are not particularly limited, and those skilled in the art can select as needed. For example, according to an embodiment of the present application, the process of trimming the flat glass plate may be further included before the first etching liquid etching process is performed on the flat glass plate. According to a specific embodiment of the present application, in the process, a flat glass plate can be cut using a numerically controlled machine tool and a diamond cutter to obtain a flat glass plate of a predetermined size. According to an embodiment of the present application, a first etching liquid etching treatment may be performed on at least a portion of the surface of the flat glass sheet to form a first textured surface on at least a portion of the surface of the flat glass sheet.

Specifically, in this step, the flat glass plate may be immersed in the first etching liquid for etching. According to an embodiment of the present application, referring to FIG. 2, the etching process may include the following specific steps:

S10: setting a mask on the surface of the flat glass plate

In this step, a mask is placed on the surface of the flat glass plate. According to an embodiment of the present application, the specific manner of providing the mask is not particularly limited. For example, a photosensitive ink may be printed on the surface of the flat glass plate, and a mask may be formed using the photosensitive ink to mask a flat glass plate region that does not need to be etched. Specifically, according to the embodiment of the present application, the corresponding film sheets can be first made according to the designed texture or pattern, and then cured by exposure and development of the film sheets to form a mask for the corresponding texture or pattern.

S20: placing one side of the flat glass plate with the mask in the etching liquid

In this step, one side of the flat glass plate provided with the mask is placed in the first etching liquid for etching. According to an embodiment of the present application, the first etching liquid may be the first etching liquid in the combination reagent described above, and those skilled in the art may select as needed.

S30: remove the mask

In this step, the mask is removed to form an etched first textured surface. According to an embodiment of the present application, a masked ink can be removed by using a specific weakly alkaline (concentration: 1-5%) solution, whereby the flat glass plate of the ink shielding region is not etched, is a transparent gloss effect, and is etched. The flat glass plate area forms the first textured surface, which is a matte matte effect. Thus, the first textured surface and the unetched planar glass panel region constitute a first layer of depth and a visual texture pattern effect.

According to a specific embodiment of the present application, the first textured surface formed by the step may have a gloss of 25-65, a roughness of 0.1-0.2, a haze of 10%-20%, and a transmittance of not less than 70%, the reflectance may be not less than 10%, such as may be 10% to 98%. One skilled in the art can make a selection based on the texture effect that is expected to be achieved. For example, specifically, the first textured surface may have a gloss of 35 to 65, a roughness of 0.1 to 0.15, a haze of 10% to 15%, a transmittance of not less than 85%, and a reflectance of not less than 10 %. Thereby, the formed first textured surface has a fine texture effect, and the etched flat glass sheet still has good mechanical strength.

According to an embodiment of the present application, specific parameters of the etching process may be adjusted according to physical parameters of the first textured surface to be formed. For example, according to an embodiment of the present application, the etching temperature of the first etching solution etching process may be 25 to 40 degrees Celsius, the etching speed may be 5 to 8 micrometers/minute, and the etching time is 3 to 6 minutes. The etch depth is 15 to 30 microns. Thereby, the first textured surface having a better appearance can be easily formed without affecting the overall mechanical strength of the flat glass sheet due to excessive etching.

S200: second etching solution etching treatment

According to an embodiment of the present application, in this step, a second etching liquid etching process is performed on the flat glass plate on which the first textured surface is formed to form a second textured surface on the flat glass plate. According to an embodiment of the present application, the second etched etching process forms the second textured surface as long as at least one of a coverage position, an etching depth, a gloss, a roughness, a haze, a reflectance, and a transmittance. On the top, there is a difference from the first texture surface. Thereby, the appearance effect of the three-dimensional texture can be realized by the first textured surface and the second textured surface by utilizing the transparency property of the glass sheet itself.

According to an embodiment of the present application, the flat glass plate may be immersed in the second etching liquid for etching. That is, the formation of the second textured surface is achieved by providing a mask, immersing with a second etching solution, removing the mask, and the like. According to an embodiment of the present application, the formed second textured surface may have a gloss of 25-65, a roughness of 0.1-0.2, a haze of 10%-20%, and a transmittance of not less than 70%. The reflectance may be not less than 10%, and may be, for example, 10% to 98%. One skilled in the art can make a selection based on the texture effect that is expected to be achieved. For example, specifically, the second textured surface has a gloss of 25-45, a roughness of 0.15-0.2, a haze of 15%-17%, a transmittance of 70-80%, and a reflectance of not less than 20%. Thereby, the formed second textured surface has a delicate texture effect, and the etched flat glass sheet still has good mechanical strength.

Similarly, the second etching solution etching process specific parameter can be adjusted according to the physical parameters of the second texture surface to be formed. For example, according to a specific embodiment of the present application, the etching temperature of the second etching solution etching process may be 20-30 degrees Celsius, the etching speed is 3-6 micrometers/minute, and the etching time is 2-5 minutes. The etch depth is 10 to 15 microns. Thereby, the second textured surface having a better appearance can be easily formed without affecting the overall mechanical strength of the flat glass sheet due to excessive etching.

According to the embodiment of the present application, the specific positions of the first textured surface and the second textured surface formed in front are not particularly limited. Hereinafter, the specific position of the above textured surface will be described in detail according to a specific embodiment of the present application:

According to an embodiment of the present application, referring to FIG. 3, the projection of the first textured surface 110 and the second textured surface 120 on the flat glass plate 100 may not coincide at all, that is, the second textured surface 120 covers the flat glass plate. At least a portion of the area that is not covered by the first textured surface 110. Thereby, different textures can be formed in different regions of the flat glass plate 100. Since the glass has light transmissivity, the planar glass plate 100 as a whole has a layered three-dimensional texture effect.

According to an embodiment of the present application, referring to FIG. 4, the projections of the first textured surface 110 and the second textured surface 120 on the flat glass sheet 100 may partially overlap, that is, the second textured surface 120 covers the first textured surface. At least a portion of the area of the 110, and the area of the planar glass sheet 100 that is not covered by the first textured surface 110. The second textured surface 120 covers the area of the first textured surface 110, ie, the overlap 20. Thereby, different textures can be formed in different regions of the flat glass sheet 100 and different levels of texture can be formed in at least a portion of the same region, thereby making the flat glass sheet 100 have a hierarchical three-dimensional texture effect.

According to an embodiment of the present application, referring to FIG. 5, the projections of the first textured surface 110 and the second textured surface 120 on the planar glass sheet 100 may completely coincide, that is, the second textured surface 120 covers the first textured surface 110. At least part of the area. Thereby, different levels of texture can be formed in the same area of the flat glass plate 100, and the flat glass plate 100 can have a layered three-dimensional texture effect.

S300: Perform bending treatment

In this step, the flat glass plate on which the first textured surface and the second textured surface are formed is bent to form a curved surface on the flat glass plate to form a curved glass plate having a layered three-dimensional texture effect. According to the embodiment of the present application, the specific method of the bending process is not particularly limited. For example, according to the specific embodiment of the present application, the flat glass plate can be subjected to hot pressing treatment, and the flat glass plate can be obtained according to the three-dimensional curved mold designed in advance. 3D surface effects. Specifically, the bending process can also be performed only on the edge of the flat glass plate, thereby forming a curved glass plate in which the intermediate portion is in a plane and the edge is curved. When the curved glass sheet is applied to an electronic device, such as a screen of a mobile phone, the overall visual effect of the screen and the body can be improved, and the hand feel can be improved. According to an embodiment of the present application, the direction of the bending process is not particularly limited, and the first textured surface and the second textured surface may be located on the front or back of the three-dimensional curved glass.

According to an embodiment of the present application, referring to FIG. 6, after the bending process is performed, the method for preparing a curved glass plate may further include:

S400: Performing optical coating treatment

In this step, the flat glass plate on which the curved surface is formed is subjected to an optical coating process. According to the embodiment of the present application, the optical coating can be performed on the back surface of the curved glass plate, that is, the optical glass is coated on the side of the curved glass away from the first textured surface, thereby adjusting the transmittance of the curved glass plate. And the reflectivity makes the curved glass plate more transparent and can achieve better texture effect. According to the embodiment of the present application, the material, transmittance, and reflectance of the coating film are not particularly limited, and those skilled in the art may select according to needs, for example, according to a specific embodiment of the present application, the coating target may be silicon oxide, The superposition coating of the titanium oxide combination may have an optical transmittance of 75% to 95% and a reflectance of 5% to 20%.

S500: Performing inkjet coloring

In this step, the optically-coated glass sheet subjected to the optical coating treatment is subjected to an inkjet coloring treatment. According to the embodiment of the present application, the color of the inkjet coloring process is not particularly limited, and the ink color can be formulated according to the designed pattern color. According to an embodiment of the present application, colored ink adhesion can be performed by an inkjet method. After inkjet coloring, the fine texture produced by the previous step is more obvious, and with the transparency of the optical coating, a multi-layer texture interlacing stereo effect can be formed.

In summary, the method can realize the hierarchical three-dimensional texture on the curved glass plate, which greatly enriches the appearance of the curved glass.

According to an embodiment of the present application, referring to FIG. 7, the curved glass sheet prepared by the method described above may include a curved surface 10 formed by bending a flat glass sheet 100, and a first surface disposed on the flat glass sheet 100. A textured surface 110 and a second textured surface 120. Therefore, the curved glass plate has all the features and advantages of the curved glass plate prepared by the method for preparing the curved glass plate described above, and details are not described herein again.

In another aspect of the application, the application proposes an electronic device. According to an embodiment of the present application, referring to FIG. 8, the electronic device 1000 includes: a body; and a housing 200, at least a portion of which is made of a curved glass sheet prepared by the method described above. Therefore, the electronic device 1000 has all the features and advantages of the curved glass plate described above, and details are not described herein again. In general, the housing of the electronic device has a layered three-dimensional texture with a rich appearance.

The embodiments of the present application have been described in detail above. However, the present application is not limited to the specific details in the foregoing embodiments. Various simple modifications may be made to the technical solutions of the present application within the technical concept of the present application. It belongs to the scope of protection of this application.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction.

In addition, any combination of various embodiments of the present application may be made as long as it does not contradict the idea of the present application, and it should also be regarded as the content disclosed in the present application.

In the description of the present application, it is to be understood that the orientations or positions of the terms "upper", "lower", "front", "back", "top", "bottom", "inner", "outside", etc. are understood. The relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description and the simplified description, and is not intended to indicate or imply that the device or component referred to has a specific orientation, and is constructed and operated in a specific orientation. It is not to be construed as limiting the application.

Claims

A combination reagent for preparing curved glass sheets, comprising:

First etching solution;

Second etching solution,

Wherein, the first etching liquid and the second etching liquid respectively comprise:

25 to 55 wt% of hydrofluoric acid;

6 to 25 wt% of nitric acid;

15 to 45 wt% of phosphoric acid;

0 to 25 wt% of acetic acid;

0 to 25 wt% of sulfuric acid.
The combination reagent according to claim 1, wherein the composition of the first etching liquid and the second etching liquid are different.
The combination reagent according to claim 1 or 2, wherein one of the first etching liquid and the second etching liquid comprises:

25 to 45 wt% of hydrofluoric acid;

6 to 25 wt% of nitric acid;

15 to 35 wt% phosphoric acid;

5 to 25 wt% of acetic acid.
The combination reagent according to claim 3, wherein the other of the first etching liquid and the second etching liquid comprises:

35 to 55 wt% of hydrofluoric acid;

6 to 25 wt% of nitric acid;

25 to 45 wt% phosphoric acid;

6 to 25 wt% sulfuric acid.
The combined reagent according to claim 1, wherein the first etching liquid is an aqueous solution, and the first etching liquid comprises: 30-40% by weight of hydrofluoric acid based on the total mass of the first etching liquid; 10 to 20 wt% of nitric acid; 20 to 30 wt% of phosphoric acid; and 10 to 20 wt% of acetic acid;

The second etching liquid is an aqueous solution, and the second etching liquid comprises: 40 to 50 wt% of hydrofluoric acid; 10 to 20 wt% of nitric acid; 30 to 40 wt%, based on the total mass of the second etching liquid. % phosphoric acid; and 10-20% by weight acetic acid.
A method for preparing a curved glass sheet by using the combination reagent according to any one of claims 1 to 5, comprising:

Etching the planar glass plate with the first etching liquid and the second etching liquid, respectively, to form a first textured surface and a second textured surface on the flat glass plate;

The flat glass plate is bent.
The method of claim 6 wherein said first textured surface covers a portion of a surface of said planar glass sheet, said second textured surface covering at least a portion of said planar glass sheet not covered by said first textured surface .
The method of claim 7 wherein said first textured surface covers a portion of a surface of said planar glass sheet, said second textured surface covering said planar glass sheet not covered by said first textured surface The entire area.
The method of claim 6 wherein the second textured surface covers at least a portion of the first textured surface.
The method of claim 9 wherein said second textured surface covers said first textured surface.
The method of claim 6 wherein said first textured surface covers a portion of a surface of said planar glass sheet, said second textured surface covers at least a portion of said first textured surface, and said planar glass sheet An area that is not covered by the first textured surface.
The method of claim 11 wherein said second textured surface covers said first textured surface and said planar glass sheet is uncovered by said first textured surface.
The method of claim 6, the etching process comprising:

Providing a mask on the surface of the flat glass plate;

Placing one side of the flat glass plate with the mask in the first etching liquid or the second etching liquid;

The mask is removed.
The method according to claim 6, wherein the first textured surface and the second textured surface respectively have a gloss of 25-65, a roughness of 0.1-0.2, and a haze of 10, respectively. %-20%, the transmittance is independently 70% or more, and the reflectance is independently 10% to 98%.
The method according to claim 14, wherein the first textured surface has a gloss of 35-65, a roughness of 0.1-0.15, a haze of 10%-15%, and a transmittance of 85% or more. .
The method according to claim 6, wherein the first texture surface is formed by the etching process performed by the first etching liquid, and the etching temperature for forming the first texture surface is 25-40 Celsius, etching speed is 5-8 micrometers/minute, etching time is 3-6 minutes, etching depth is 15-30 micrometers, the glossiness of the first textured surface is 35-65, and the roughness is 0.1- 0.15, the haze is 10%-15%, the transmittance is not less than 85%, and the reflectance is not less than 10%.
The method according to claim 6, wherein the second texture surface is formed by the etching process performed by the second etching liquid, and the etching temperature for forming the second texture surface is 20-30 Celsius, etching speed is 3-6 micrometers/minute, etching time is 2-5 minutes, etching depth is 10-15 micrometers, the glossiness of the second textured surface is 25-45, and the roughness is 0.15- 0.2, haze is 15%-17%, transmittance is 70-80%, and reflectance is not less than 20%.
The method of claim 6 further comprising:

Performing an optical coating process on the planar glass plate on which the curved surface is formed;

The flat glass plate subjected to the optical coating treatment is subjected to an inkjet coloring treatment.
The method according to claim 18, wherein the optical coating formed by the optical coating treatment has a transmittance of 75% to 95% and a reflectance of 5% to 20%.
An electronic device comprising:

Ontology;

A housing, at least a portion of which is made of a curved glass sheet made by the method of any of claims 6-19.