阅读说明：本技术 一种3d玻璃及其制造方法 (3D glass and manufacturing method thereof ) 是由 周伟杰 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种3D玻璃及其制造方法,该制造方法包括以下步骤：(1)将平面玻璃进行第一次化学钢化处理；(2)在第一次化学钢化处理后的平面玻璃一面上形成致密膜层；(3)将形成有所述致密膜层的平面玻璃进行第二次化学钢化处理；(4)对第二次化学钢化处理后的玻璃进行降温处理,获得3D玻璃。本发明3D玻璃的制造方法主要是通过先将平面玻璃进行第一次化学钢化处理,再在平面玻璃上制作致密膜层,然后进行第二次化学钢化处理,第二次钢化时由于两面状态不同,导致离子交换速度不同,从而使玻璃弯曲成一定弧度,达到制作3D玻璃的效果。(The invention discloses 3D glass and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: (1) carrying out first chemical toughening treatment on the plane glass; (2) forming a compact film layer on one surface of the plane glass after the first chemical toughening treatment; (3) carrying out secondary chemical toughening treatment on the plane glass with the dense film layer; (4) and cooling the glass subjected to the second chemical toughening treatment to obtain the 3D glass. The manufacturing method of the 3D glass mainly comprises the steps of firstly carrying out first chemical toughening treatment on the plane glass, then manufacturing a compact film layer on the plane glass, and then carrying out second chemical toughening treatment, wherein the ion exchange speed is different due to different states of two surfaces during second toughening, so that the glass is bent to a certain radian, and the effect of manufacturing the 3D glass is achieved.)

1. A method for manufacturing 3D glass is characterized by comprising the following steps:

(1) carrying out first chemical toughening treatment on the plane glass;

(2) forming a compact film layer on one surface of the plane glass after the first chemical toughening treatment;

(3) carrying out secondary chemical toughening treatment on the plane glass with the dense film layer;

(4) and cooling the glass subjected to the second chemical toughening treatment to obtain the 3D glass.

2. The method for manufacturing the 3D glass according to claim 1, wherein the stress on the double surfaces of the planar glass after the first chemical toughening treatment reaches 400-700 MPa.

3. The method for manufacturing 3D glass according to claim 1 or 2, wherein the tempering depth of the first chemical tempering treatment is less than or equal to half of the tempering depth of the second chemical tempering treatment.

4. The method for manufacturing 3D glass according to claim 3, wherein the planar glass of steps (1) and (2) is a large-plate planar glass; and (3) the plane glass with the dense film layer formed in the step (3) is a small piece of plane glass obtained by cutting the large-plate plane glass obtained in the step (2).

5. The method for manufacturing 3D glass according to claim 1 or 4, wherein the dense film layer is at least one of a reflective film, a super-hard film, an anti-glare film, an anti-fingerprint film, an anti-reflection film, an antibacterial film, a low-emissivity film, a light-adjusting film, and a self-cleaning film.

6. The method for manufacturing the 3D glass according to claim 1 or 4, wherein the dense film layer is an antireflection film, and the average reflectivity of the antireflection film in a waveband of 400-700 nm is lower than 1%.

7. The method for producing 3D glass according to claim 1, wherein the temperature reduction rate set in the temperature reduction treatment is 1 to 5 ℃/min.

8. The method for manufacturing 3D glass according to claim 1, wherein the temperature reduction treatment step is specifically: when the liquid salt on the surface of the glass does not drip any more, moving the glass to a cooling chamber, slowly cooling to 100-150 ℃ at a cooling rate of 1-5 ℃/min, and then naturally cooling to room temperature.

9. 3D glass, characterized in that it is produced by a method for producing 3D glass according to any one of claims 1 to 8.

10. The 3D glass of claim 9, wherein the aspect ratio of the planar glass is: 1.5: 1-3: 1; the arch height of the center point of the 3D glass is 5-20 mm.

Technical Field

The invention relates to the technical field of glass processing, in particular to 3D glass with a functional film layer and a manufacturing method thereof.

Background

The existing cambered surface (3D cambered surface) glass cover plate product is loved by users due to the special shape and curve; however, it is difficult to plate a functional film such as an antireflection film on the surface thereof due to the presence of the curvature. This is because the difference in height and curvature causes the difference in thickness of the film layer coated on the surface thereof, resulting in a visual difference. In addition, the hot bending equipment is expensive and low in efficiency, and the loss ratio of the die is large, so that the cost for manufacturing the arc-shaped glass is high.

Disclosure of Invention

Based on the above, it is necessary to provide 3D glass and a method for manufacturing the same, in which the method for manufacturing 3D glass of the present invention mainly includes performing a first chemical toughening treatment on a flat glass, then manufacturing a dense film layer on the flat glass, and then performing a second chemical toughening treatment, wherein the ion exchange speed is different due to different states of two surfaces during the second toughening treatment, so that the glass is bent to a certain radian, thereby achieving the effect of manufacturing 3D glass. Compared with the existing method using a hot bending machine and coating, the method has the advantages that the cost can be reduced by at least 50%, the period is shortened by at least 30%, the production efficiency is improved by at least 30%, the loss of a mould required by hot bending is avoided, the energy consumption is reduced without hot bending (the hot bending requires high temperature of more than 700 ℃), the thickness of the coating is uniform, the color difference is avoided, and the toughening strength of the coated 3D glass is ensured.

In order to solve the technical problems, the invention provides 3D glass and a manufacturing method thereof, which adopt the following technical scheme:

a method of manufacturing 3D glass, comprising the steps of:

(1) carrying out first chemical toughening treatment on the plane glass;

(2) forming a compact film layer on one surface of the plane glass after the first chemical toughening treatment;

(3) carrying out secondary chemical toughening treatment on the plane glass with the dense film layer;

(4) and cooling the glass subjected to the second chemical toughening treatment to obtain the 3D glass.

As an improvement of the 3D glass manufacturing method provided by the invention, the double-sided surface stress of the planar glass after the first chemical toughening treatment reaches 400-700 MPa.

As an improvement of the 3D glass manufacturing method provided by the invention, the tempering depth of the first chemical tempering treatment is less than or equal to half of the tempering depth of the second chemical tempering treatment.

As an improvement of the manufacturing method of the 3D glass provided by the invention, the plane glass of the steps (1) and (2) is large-plate plane glass; and (3) the plane glass with the dense film layer formed in the step (3) is a small piece of plane glass obtained by cutting the large-plate plane glass obtained in the step (2).

As an improvement of the 3D glass manufacturing method provided by the invention, the dense film layer is at least one of a reflecting film, a super-hard film, an anti-glare film, an anti-fingerprint film, an anti-reflection film, an antibacterial film, a low-radiation film, a light modulation film and a self-cleaning film.

As an improvement of the 3D glass manufacturing method provided by the invention, the dense film layer is an antireflection film, and the average reflectivity of the antireflection film in a 400-700 nm waveband is lower than 0.6%.

As an improvement of the manufacturing method of the 3D glass provided by the invention, the dense film layer is deposited on the plane glass by a physical deposition method or a chemical deposition method.

As an improvement of the 3D glass manufacturing method provided by the invention, the set cooling rate in the cooling treatment is 1-5 ℃/min.

As an improvement of the method for manufacturing the 3D glass provided by the present invention, the step of cooling treatment specifically comprises: when the liquid salt on the surface of the glass does not drip any more, moving the glass to a cooling chamber, slowly cooling to 100-150 ℃ at a cooling rate of 1-5 ℃/min, and then naturally cooling to room temperature.

The 3D glass is manufactured by the manufacturing method of the 3D glass.

As an improvement of the 3D glass provided by the present invention, the aspect ratio of the planar glass is: 1.5: 1-3: 1.

As an improvement of the 3D glass provided by the invention, the arch height of the center point of the 3D glass is 5-20 mm.

Compared with the prior art, the invention has the following beneficial effects:

the manufacturing method of the 3D glass mainly comprises the steps of firstly carrying out first chemical toughening treatment on the plane glass, then manufacturing a compact film layer on the plane glass, and then carrying out second chemical toughening treatment, wherein the ion exchange speed is different due to different states of two surfaces during second toughening, so that the glass is bent to a certain radian, and the effect of manufacturing the 3D glass is achieved.

Because the first surface of the glass is provided with the dense film layer for blocking sodium ions, the surface of the glass is not toughened during the second chemical toughening, while the other surface (namely the second surface) of the glass can be continuously toughened, and the stress of the first surface is different from that of the second surface, so that an arc surface is generated. Therefore, the 3D glass cover plate with the functional film layer can be obtained without hot bending or directly plating the functional film layer on the arc surface.

Compared with the existing method using a hot bending machine and coating, the method has the advantages that the cost can be reduced by at least 50%, the period is shortened by at least 30%, the production efficiency is improved by at least 30%, the loss of a die required for hot bending is avoided, the energy consumption is reduced without hot bending (the hot bending requires high temperature above 700 ℃), the thickness of the film layer is uniform and has no chromatic aberration, the surface stress of the first surface with the compact film layer reaches 400-700 MPa and the surface stress of the corresponding second surface reaches 500-800 MPa through two times of toughening treatment, and the toughening strength of the coated 3D glass is ensured.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to solve the technical problems in the background art, the invention provides 3D glass and a manufacturing method thereof, which can be used for manufacturing the 3D glass rapidly and at low cost, can obtain a functional film layer without chromatic aberration on the surface of the 3D glass, and simultaneously ensures the tempering strength.

Specifically, the invention provides a manufacturing method of 3D glass, which comprises the following steps:

(1) carrying out first chemical toughening treatment on the plane glass;

(2) forming a compact film layer on one surface of the plane glass after the first chemical toughening treatment;

(3) carrying out secondary chemical toughening treatment on the plane glass with the dense film layer;

(4) and cooling the glass subjected to the second chemical toughening treatment to obtain the 3D glass.

The double-sided surface stress of the planar glass after the first chemical toughening treatment reaches 400-700 MPa, and the surface stress of the first surface with the compact film layer reaches 400-700 MPa and the surface stress of the corresponding second surface reaches 500-800 MPa after two times of toughening treatment.

If the first chemical toughening is not carried out, but only the first toughening process of the second chemical toughening is carried out, the ion exchange speed of the first surface with the compact film layer basically does not cause the surface to have no toughening layer, so that the strength of the glass on one surface is obviously lower than that of the glass on the other surface, and the glass belongs to a defective product.

Preferably, as for example, soda-lime glass, the toughening depth of the first chemical toughening treatment is 5-10 μm, and the toughening depth of the second chemical toughening treatment is 10-15 μm; taking the aluminum-silicon glass as an example, the toughening depth of the first chemical toughening treatment is 10-20 μm, and the toughening depth of the second chemical toughening treatment is 20-60 μm.

Further, the toughening depth of the first chemical toughening treatment is less than or equal to half of the toughening depth of the second chemical toughening treatment. Furthermore, the plane glass of the steps (1) and (2) is large-plate plane glass; and the plane glass with the dense film layer formed in the step (3) is a small piece of plane glass obtained by cutting the large-plate plane glass obtained in the step (2). If the tempering is very deep for the first time, large-scale tempering cannot be performed, the large-scale tempering cannot be performed only by cutting into small grains, and the tempering is performed again, and if the first tempering depth is half or less of the second tempering depth, large-scale tempering can be performed on the plane glass of the large plate, and then a large-scale dense film is plated, and the large-scale tempering and the second chemical tempering are performed, so that the design can remarkably shorten the production period by about 15-20%, improve the production efficiency by about 15-20%, reduce the labor cost by about 10-12%, and reduce the total cost by about 15-20.

The manufacturing method of the 3D glass mainly comprises the steps of firstly carrying out first chemical toughening treatment on the plane glass, then manufacturing a compact film layer on the plane glass, and then carrying out second chemical toughening treatment, wherein the ion exchange speed is different due to different states of two surfaces during second toughening, so that the glass is bent to a certain radian, and the effect of manufacturing the 3D glass is achieved.

Because the first surface of the glass is provided with the dense film layer for blocking sodium ions, the surface of the glass is not toughened during the second chemical toughening, while the other surface (namely the second surface) of the glass can be continuously toughened, and the stress of the first surface is different from that of the second surface, so that an arc surface is generated. Therefore, the 3D glass cover plate with the functional film layer can be obtained without hot bending or directly plating the functional film layer on the arc surface.

The compact film layer can be a single-function film layer, such as one of a reflecting film (a high reflecting film or an antireflection film), a super-hard film, an anti-glare film, an anti-fingerprint film, an antireflection film, an antibacterial film, a low radiation film, a light modulation film and a self-cleaning film; or a multifunctional film layer, such as a multifunctional film layer including at least two functions of a reflective film, a super-hard film, an anti-glare film, an anti-fingerprint film, an anti-reflection film, an antibacterial film, a low-emissivity film, a light-adjusting film, and a self-cleaning film. Specifically, taking a reflective film as an example, the reflective film is composed of alternately deposited high refractive index thin films and low refractive index thin films. The high-refractive-index thin film has a refractive index of more than 1.8, and the high-refractive-index thin film can be made of the following materials: ZrO (ZrO)₂、TiO₂、Ti₂O₅、ZnO、TiO、Fe₂O₃、Nb₂O₅、Si₃N₄The low refractive index film has a refractive index of 1.7 or less, and the selected materials are as follows: SiO, SiO₂、Al₂O₃、MgF、CaF₂One kind of (1).

Further, the dense film layer may be deposited on the flat glass by a physical deposition method or a chemical deposition method, but is not limited thereto. The physical or chemical deposition method comprises one or more of a vacuum coating method, a metal thermal evaporation coating method, a magnetron sputtering method, a laser pulse deposition method, an atomic layer deposition method, a chemical plating method and an electrochemical method, and during the specific implementation, the physical or chemical deposition method is selected and matched according to the material and the requirement of the compact film layer, and the detailed description is omitted.

As an embodiment of the invention, the dense film layer is an antireflection film, the average reflectivity of the antireflection film in a waveband of 400-700 nm is lower than 1%, and the thickness of the antireflection film is preferably controlled to be 200-600 nm.

Specifically, taking the antireflection film as an example, in the coating process, the target power is 10-12 KW, the argon flow is controlled to be 30-40 sccm, and the oxygen flow is controlled to be 200-260 sccm. The antireflection film with multiple alternately stacked film layers is formed by the coating process, so that the single-side reflectivity of the antireflection film is controlled to be below 1%, and the formed compact structure prevents sodium ions from migrating in the subsequent tempering process, so that the ion exchange speed is different due to inconsistent states of two sides of the glass, and the glass is bent.

The chemical toughening treatment of the glass comprises a preheating stage and a toughening stage. The preheating stage is to preheat the glass to the toughening temperature, so that the production period of the toughening process is greatly shortened, the heat consumption of the glass is reduced, and the production efficiency is improved. The toughening stage is to perform chemical toughening treatment on the preheated glass by using toughening treatment liquid.

In the case of silicate glass or aluminosilicate glass, the tempering treatment liquid includes one or more alkali-containing salts to chemically temper the glass, and the radius of the alkali metal ion used is larger than that of the sodium ion, that is, the tempering treatment liquid may include any one or more of potassium salt, rubidium salt, and cesium salt. In the case of lithium aluminosilicate glass, the tempering treatment liquid includes one or more alkali-containing salts to chemically temper the glass, and the radius of the alkali metal ion is larger than that of lithium ion or sodium ion, that is, the tempering treatment liquid may include any one or more of sodium salt, potassium salt, rubidium salt and cesium salt. The sodium, potassium, rubidium and cesium salts are chemical substances known to those skilled in the art and are not described herein in detail. Alkali metal nitrates are preferably used, but not limited thereto.

It should be noted that the preheating treatment and the chemical toughening treatment in the first chemical toughening treatment and the second chemical toughening treatment of the present invention are conventional treatments, and the related process parameters are not particularly limited, and those skilled in the art can appropriately adjust the process parameters according to the required toughening depth, and the adjustment also belongs to the known technology, and will not be described in detail herein. Preferably but not limited, in the preheating treatment step, the preheating temperature is 330-370 ℃, and the preheating time is 1.5-2H; in the step of chemical toughening treatment, the toughening temperature is 420-450 ℃, and the toughening time is 2-6H.

In the invention, in the step (3), the cooling rate set in the cooling process is controlled to be 1-5 ℃/min, preferably 1-2 ℃/min, so that glass burst caused by quenching is avoided, and more importantly, the stress release degree in the cooling process is ensured to be consistent without influencing the bending degree. The two sides of the glass are different, and the stress release degree is different if the glass is rapidly cooled or naturally cooled, so that the bending degree is influenced, and the hidden trouble of easy bursting exists. Preferably, the cooling treatment step specifically comprises: and when the liquid salt on the surface of the glass does not drip any more, moving the glass from the toughening furnace to a cooling chamber, slowly cooling to 100-150 ℃ according to the cooling rate, and then naturally cooling to room temperature.

The shape of the flat glass is not particularly limited in the production method of the present invention. Preferably, the shape of the plane glass can be cuboid, cube, cylinder, etc., and the thickness of the plane glass can be 0.1-1.5 mm, but is not limited thereto.

The invention also provides 3D glass prepared by the manufacturing method.

Preferably, but not limited to, in the present invention, when a rectangular parallelepiped flat glass is taken as an example, the aspect ratio of the flat glass is: 1.5: 1-3: 1, wherein the arch height of the center point of the prepared 3D glass is 5-20 mm, the curvature in the length direction is large, and the curvature in the width direction is slight.

In order to make the technical scheme better understood by those skilled in the art, the technical scheme of the present invention is clearly and completely described below by taking the planar soda-lime glass with the aspect ratio of 2:1 and the dense film layer as the antireflection film. The following are specific examples of the present invention, and raw materials, equipments and the like used in the following examples can be obtained by purchasing them unless otherwise specified.