CN107867803B - Optical glass conforming to Kelamolong-like function relation and preparation method thereof - Google Patents
Optical glass conforming to Kelamolong-like function relation and preparation method thereof Download PDFInfo
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- 239000005304 optical glass Substances 0.000 title claims abstract description 117
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000011521 glass Substances 0.000 claims abstract description 115
- 238000005498 polishing Methods 0.000 claims abstract description 78
- 238000012986 modification Methods 0.000 claims abstract description 18
- 230000004048 modification Effects 0.000 claims abstract description 18
- 238000002834 transmittance Methods 0.000 claims abstract description 16
- 238000001579 optical reflectometry Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 45
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 13
- -1 hydroxide ions Chemical class 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 9
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- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims 2
- 239000003365 glass fiber Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
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- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 241001422033 Thestylus Species 0.000 description 2
- 239000005354 aluminosilicate glass Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
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- 230000003287 optical effect Effects 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
- C03C15/02—Surface treatment of glass, not in the form of fibres or filaments, by etching for making a smooth surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
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Abstract
The invention discloses optical glass conforming to a Kelamolong-like function relationship, which has high transmittance and low glossiness, and the optical glass has a low glossiness surface, wherein the parallel light reflectivity of the low glossiness surface is less than 3%, the glossiness is 5-120 degrees, and the average roughness is 10-2000 nm; the average visible light transmittance of the optical glass is greater than 84%, and the haze is 0.5-80 ℃. The optical glass with the characteristics has the advantages of ultra-thinness, light weight, anti-glare property, high strength, low haze, high definition, high resolution and the like, and most importantly, has the characteristic of no sparkling point compared with the existing anti-glare glass. The invention also discloses a preparation method of the optical glass, which comprises the following steps: a step of performing surface modification treatment on the glass plate; and a step of polishing the glass plate.
Description
Technical Field
The invention relates to the field of glass and preparation thereof, in particular to optical glass and a preparation method thereof, and more particularly relates to optical glass which is applied to display panel glass in the fields of consumer electronics, industrial control and the like such as mobile phones, flat display glass panels, projection type capacitive touch screens and the like and meets the relation of a Kerbelon-like function and a preparation method thereof.
Background
The anti-dazzle glass is also called as frosted glass or anti-reflection glass, and is characterized by that the glass substrate is undergone the process of special surface treatment, so that it has lower reflection ratio than that of general glass, and does not basically affect light transmission, and the light reflectivity is reduced from 8% to below 1%. The anti-glare glass can improve the visual angle and brightness of a display picture, so that an image is clearer, the color is more gorgeous, and the color is more saturated, thereby obviously improving the display effect. The method can be widely used for manufacturing liquid crystal display screens, rear projection televisions, educational machine display screens, mobile phone cover plates, electronic photo frames, instrument display screen panels and other fields.
The anti-glare substrate glass is an important basic element constituting a new flat panel display device, and has a high demand for optical properties. The current production technology of the anti-glare glass mainly comprises two types: one is a coating process, such as wet coating of coated glass using sol-gel techniques. The other is an acid etching method. In the former, because the adhesion force between the coating and the glass body is poor, the coating is easily influenced by the environment, and falls off under high and low temperature environments or after a period of time, so that the service life is short, and in addition, the anti-glare glass manufactured by a coating and coating method has too high glossiness and cannot effectively play the anti-glare effect; the latter is a development trend and direction in the future because the physical and chemical structure of the glass surface is changed, the use environment is widened, the service life is long, the resistance index is far better than that of the coated glass, but the acid etching process needs to use a large amount of hydrofluoric acid, the chemical environment is greatly damaged by waste liquid and waste gas, the anti-glare glass produced by the acid etching method is influenced by the relatively fixed chemical reaction effect and speed brought by the fixed acid etching liquid (frosting liquid and etching liquid), the indexes such as the glossiness, the haze and the average roughness cannot be adjusted according to the application requirements, and the clarity of the produced anti-glare glass is usually poor.
Chinese patent with application number CN201210383038.2 discloses a process for producing anti-glare glass by using high borosilicate and high alumina silica glass, which comprises the following steps: (1) weighing the raw materials according to the formula of the frosting solution, mixing and stirring uniformly, curing for 24-30 hours, and preparing the frosting solution; (2) cleaning glass to be frosted, and then carrying out protection treatment on one side which does not need to be frosted; (3) putting the protected glass into pretreatment liquid for further cleaning; (4) putting the treated glass into the cured frosting liquid for frosting for 30-200 seconds, taking out and washing with water; (5) and (4) placing the frosted glass into a polishing solution for etching to obtain the finished product of the anti-dazzle glass. The anti-glare glass prepared by the method has a certain good anti-glare effect, but under the condition of strong monochromatic backlight, the anti-glare glass prepared by the method disclosed by the patent appears a sparkling point (see figure 1) so as to cause poor visual effect for users, and particularly, with the improvement of the resolution of a first-generation display and the enhancement of backlight, the sparkling point problem of the anti-glare glass prepared by the prior art becomes more prominent.
For this reason, it is necessary to design a new optical glass to overcome the above problems.
Disclosure of Invention
The invention aims to solve the technical problems that the anti-glare glass prepared by the prior art is easy to have the defects of high glossiness, low definition and flashing points under the condition of monochromatic strong backlight, and provides a novel optical glass and a preparation method thereof.
The technical scheme provided by the invention for the technical problem is as follows:
the invention provides optical glass conforming to a Kerbelon-like function relationship, which has the characteristics of high transmittance, no reflection and projected flash points and low glossiness and is characterized in that the optical glass has a low-glossiness surface, the parallel light reflectivity of the low-glossiness surface is less than 3%, the glossiness is 5-120 degrees, and the average roughness is 10-2000 nm; the average visible light transmittance of the optical glass is greater than 84%, and the haze is 0.5-80 ℃.
In the optical glass conforming to the Kevlar-like functional relationship, the relationship among the haze, the average roughness and the glossiness of the low-glossiness surface of the optical glass satisfies the Kevlar-like functional relationship:
wherein,
x is the haze, in degrees,
y is the average roughness in nm,
z is the gloss, in units of "degrees",
k is a constant and takes a value of 7 +/-3,
the value is 1 when the optical glass has only one of the low-gloss surfaces, and 0.5 ± 0.2 when the optical glass has two of the low-gloss surfaces opposed to each other.
In the optical glass conforming to the Clara-like function relationship provided by the present invention, in a binary coordinate system in which the haze of the optical glass is taken as an abscissa and the gloss of the low-gloss surface is taken as an ordinate, a point composed of the haze of the optical glass and the gloss of the low-gloss surface falls on a curve in a first quadrant of the binary coordinate system, and an absolute value of a slope of the curve gradually decreases along a positive direction of the abscissa.
In the optical glass conforming to the Kelamolong-like functional relationship, the optical glass only has one low-glossiness surface, and the average visible light transmittance of the optical glass is more than 87%.
The present invention also provides a method for producing an optical glass, for producing an optical glass conforming to a relationship of a kohlrabi-like function as described above from a glass plate having opposed first and second surfaces to be processed, the method comprising: a step of performing surface modification treatment on the glass plate; and a step of polishing the glass plate.
In the preparation method of the optical glass provided by the invention, the step of carrying out surface modification treatment on the glass plate is completed by adopting a mechanical grinding method or a dry powder spraying method or a water flow spraying method; the surface modification treatment is to change the surface condition of the glass plate by mechanical force to generate a large number of micropores on the surface of the glass plate, the area of each micropore is larger than 12.5 square nanometers, and the sum of the areas of all micropores is larger than more than 1% of the area of the modified surface of the glass plate.
In the method for producing optical glass provided by the present invention, the step of polishing the glass plate is performed by a mechanical polishing method or a chemical polishing method.
In the method for producing an optical glass provided by the present invention,
the mechanical polishing method comprises the following steps: polishing the glass plate by using a polishing solution containing inorganic oxide particles with the mass percentage of more than 5% through a polishing disc and external mechanical pressure;
the chemical polishing method comprises alkaline polishing or acid polishing;
the alkaline polishing comprises: placing the glass plate in a polishing tank with alkaline polishing solution, and soaking and polishing for at most 240min, wherein the molar concentration of hydroxide ions in the alkaline polishing solution is 10-50 mol/L;
the acid polishing comprises: and (2) placing the glass plate in a polishing tank with acidic polishing solution for soaking and polishing for at most 30min, wherein the molar concentration of hydrogen ions in the acidic polishing solution is 0.5-10.5 mol/L, and the molar concentration of fluorine ions in the acidic polishing solution is 0.05-6 mol/L.
In the method for producing the optical glass provided by the present invention, the method comprises the following main steps:
protecting the second surface of the glass plate by sticking a film or coating;
performing surface modification treatment on the first surface of the glass plate;
cleaning the glass plate;
and polishing the first surface of the glass plate.
In the method for producing the optical glass provided by the present invention, the method comprises the following main steps:
performing surface modification treatment on the first surface and the second surface of the glass plate respectively or simultaneously;
cleaning the glass plate;
and simultaneously polishing the first surface and the second surface of the glass plate.
The optical glass conforming to the Kelamolong-like functional relationship and the preparation method thereof have the following beneficial effects:
1. the optical glass prepared according to the invention does not generate sparkling points under the condition of strong monochromatic backlight, thereby ensuring good visual experience for users, being better suitable for next generation of displays with higher resolution and stronger backlight and having good market prospect.
2. The optical glass prepared according to the invention has the advantages of ultra-thin thickness, light weight, anti-glare property, high strength, low haze, high definition, high resolution and the like.
3. The preparation method of the optical glass provided by the invention is convenient and simple to operate, has low preparation cost and is beneficial to industrial automatic production.
Drawings
FIG. 1 is a schematic view of an effect of a conventional optical glass under a strong backlight condition;
FIG. 2 is a schematic view illustrating the effect of the optical glass provided in the first embodiment under a strong backlight condition;
FIG. 3 is a graph showing the relationship between haze and gloss of an optical glass provided in the first embodiment;
FIG. 4 is a flowchart of a method for producing an optical glass provided in example III.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The invention provides optical glass which has high transmittance, no reflection and projection flash points and low glossiness and accords with a Kerbelon-like function relationship, wherein the haze of the optical glass is 0.5-80 degrees, and the optical glass has a low glossiness surface; the parallel light reflectivity of the low-glossiness surface is less than 3%, the glossiness is 5-120 degrees, and the average roughness is 10-2000 nm.
When the optical glass has two of the low-gloss surfaces opposed to each other, the average transmittance of visible light of the optical glass is greater than 84%. When the optical glass has only one of the low-gloss surfaces, the average transmittance of visible light of the optical glass is more than 87%.
The relationship among haze, average roughness and glossiness of the low-glossiness surface of the optical glass satisfies a quasi-Kerbelon function relationship. The Kerbonlon equation generally describes the change equation of physical quantity of a single substance at the first-order phase transition phase equilibrium, namely, the relationship of the volume (V), temperature (T) and pressure (P) of the substance is quantitatively analyzed when the mole number of the single substance is the same:
where L is the latent heat of phase change and Δ v is the change in specific volume.
The functional relationship is as follows:
is a Kerbelon-like functional relationship in which,
x is the haze, in degrees,
y is the average roughness in nm,
z is the gloss, in units of "degrees",
k is a constant and takes a value of 7 +/-3,
the value is 1 when the optical glass has only one of the low-gloss surfaces, and 0.5 ± 0.2 when the optical glass has two of the low-gloss surfaces opposed to each other.
In the case where the haze of the optical glass having a relatively large gloss is smaller than the haze of the optical glass having a relatively small gloss with respect to the plurality of optical glasses, in a binary coordinate system having the haze of the optical glass as an abscissa and the gloss as an ordinate, a point constituting the haze and the gloss of the optical glass falls on a curve of a first quadrant of the binary coordinate system, and an absolute value of a slope of the curve gradually becomes smaller along a positive direction of the abscissa.
The first embodiment is as follows:
this example provides a plurality of pieces of optical glass each having only one of the low-gloss surfaces, as shown in fig. 2.
In order to better illustrate the specific embodiments provided in this embodiment, it is necessary to first describe the detection apparatus, the measurement principle, and the calculation method used in this embodiment to detect the average roughness, the haze, and the gloss.
1) Detection of the Low gloss surface average roughness
A detection instrument: SJ-210 surface average roughness measurer.
The test principle is as follows: when the stylus is stroked lightly directly over the measured surface of the workpiece, the stylus will move back and forth in the direction of the measured surface due to the peak and valley undulations of the measured surface profile, which can be amplified by electronic means and output data and images regarding roughness average by pointing or other means.
The calculation method comprises the following steps:
where Ra is the surface average roughness, n is the evaluation length, and ri is the deviation of the evaluation curve.
2) Measurement of the gloss of the Low-gloss surface
A detection instrument: WGG60 gloss Meter.
The test principle is as follows: the measuring head of the instrument consists of a transmitter and a receiver; the emitter consists of an incandescent light source and a set of lenses, which produce an incident light beam of a certain desired and angular extent; the receiver consists of a lens and a photosensitive element and is used for receiving the cone beam reflected by the surface of the sample wafer.
The calculation method comprises the following steps:
wherein W is the energy of incident light, W0For the energy of the reflected light, i is the angle between the incident ray and the normal (angle of incidence) and n is the angle of refraction.
3) Detection of haze of the optical glass
A detection instrument: WGT-transmittance/haze meter.
The detection principle is as follows: when a beam of light is incident on a medium, the beam of light is non-uniform due to physical and optical properties; surface defects, internal tissue inhomogeneity, presence of bubbles and impurities, etc., the light beam changes direction (diffusion and deflection), and the generated partial disorderly light is called scattered light.
The calculation method comprises the following steps: h ═ Td×100/TtWherein H is haze, TdIs slow dispersion transmittance, TtThe transmittance is shown.
The average roughness of the low-gloss surface, the gloss of the low-gloss surface, and the haze of each of the optical glasses were measured according to the above-mentioned methods, and the results thereof are shown in the following tables.
| Optical glass numbering | Haze/degree | Degree of gloss/degree of gloss | Average roughness/nm |
| 1 | 43.3 | 20.1 | 533 |
| 2 | 18.17 | 40.3 | 769 |
| 3 | 8.3 | 61 | 427 |
| 4 | 4.86 | 79.4 | 521 |
| 5 | 1.6 | 106.5 | 187 |
The values of average roughness and haze for each optical glass in the above table are substituted into the cramber-like function:
wherein,
x is the haze, in degrees,
y is the average roughness in nm,
z is the gloss, in units of "degrees",
k is a constant and takes a value of 7,
is a coefficient, and takes a value of 1.
Calculating a reference value of the glossiness of each piece of optical glass:
the number of the code is 1,
the number of the code is 2,
the number of the code is 3,
the number 4 is that of the code,
the number of the code is 5,
it is to be noted that when the gloss of the low gloss surface of the optical glass is measured using the WGG60 gloss meter, there is an inevitable measurement tolerance, which is + -10 degrees. Therefore, the range of the measured value of the gloss of each piece of the optical glass should be:
number 1, 10.1-30.1,
no. 2, 30.3 to 50.3,
the numbers 3, 51 to 71,
no. 4, 69.4 to 89.4,
no. 5, 96.5-116.5.
Obviously, the reference value of the gloss of the optical glass calculated by the klebside function falls within the range of the actual detection value, thereby confirming that the average roughness, the gloss and the haze of the optical glass provided by the present embodiment conform to the klebside function.
From another perspective, by considering the value change of the constant K in the klebside function and the detection tolerance of the glossiness, the upper limit value and the lower limit value of the glossiness corresponding to each piece of optical glass can be calculated, and as long as the detection value falls between the upper limit value and the lower limit value, the values of the glossiness, the haze and the average roughness of the optical glass can be proved to be in accordance with the klebside function. The following was demonstrated:
when the constant K is 10 and a tolerance of-10 is added, the lower limit of the gloss corresponding to each piece of optical glass can be obtained:
the number of the code is 1,
the number of the code is 2,
the number of the code is 3,
the number 4 is that of the code,
the number of the code is 5,
when the constant K is 10 and a tolerance of 10 is added, an upper limit value of the gloss corresponding to each piece of optical glass can be obtained:
the number of the code is 1,
the number of the code is 2,
the number of the code is 3,
the number 4 is that of the code,
the number of the code is 5,
obviously, the measured value of the glossiness of each of the optical glasses is between the upper limit value and the lower limit value of the glossiness of the corresponding optical glass. Thus, the gloss, haze and average roughness of the optical glass conform to the kebabylon-like function.
In addition, referring to fig. 3, a binary coordinate system in which the ordinate is gloss and the abscissa is haze is plotted, in which a relation curve (function reference value curve) of a reference value of gloss of the optical glass to a haze value, a relation curve (function upper limit curve) of an upper limit value of gloss of the optical glass to a haze value, and a relation curve (function lower limit curve) of a lower limit value of gloss of the optical glass to a haze value are plotted.
As can be seen from the figure, whether the function reference value curve, the function lower limit curve or the function upper limit curve reflects a rule: the gloss and the haze of the low-gloss surface of the optical glass are in a nonlinear inverse relationship, and particularly, for the low-gloss surfaces of a plurality of the optical glasses, the haze of the optical glass with relatively high gloss is smaller than that of the optical glass with relatively low gloss. In addition, the absolute values of the slopes of the function reference value curve, the function lower limit curve, and the function upper limit curve are gradually decreased in the positive direction of the abscissa.
The present example provides an optical glass in which the points formed on the binary coordinates of the gloss value of the low-gloss surface and the haze value of the optical glass both fall on the function reference value curve.
It is to be noted that, in other embodiments, in consideration of the presence of the detection tolerance, the point on the binary coordinate at which the gloss value of the low-gloss surface of the optical glass and the haze value of the optical glass are formed may fall in the region between the function lower limit curve and the function upper limit curve.
Example two:
the optical glass provided by the embodiment has two low-glossiness surfaces which are opposite up and down. The average roughness and the gloss of two of the low-gloss surfaces, and the haze of the optical glass were measured separately according to the method mentioned in example one.
It is to be noted that the gloss and average roughness are concepts of reflecting light with respect to a single surface, and the haze is a concept of transmitting light, so that for an optical glass having two of the low-gloss surfaces opposed to each other, the relationship of the Kevlar-like function is satisfied:
x is the haze, in degrees,
y is the average roughness in nm,
z is the gloss, in units of "degrees",
k is a constant and takes the value of 10,
the value is 0.5.
The average roughness values of the upper and lower low-gloss surfaces are both 316, the gloss values of the upper and lower low-gloss surfaces are both 55.8, and the haze value of the optical glass is 21.72.
When K is 7 and 0.5, there are:
obviously, the gloss value calculated from the kefir-like function is within the allowable fluctuation range of the detection value.
Example three:
the present embodiment provides a method for preparing an optical glass, which is used for preparing a glass plate to be processed, which has a first surface and a second surface which are opposite to each other, into the optical glass with a low-glossiness surface as described in the first embodiment, and the preparation method comprises the following steps:
and step S1, performing film sticking protection on the second surface of the glass plate.
Specifically, a laminator is used for attaching corrosion-resistant plastic protective films to the second surface and four side surfaces of the glass plate, the thickness of each protective film is 0.1 +/-0.05 mm, and in the interval range, the protective films can effectively protect other surfaces of the glass display screen without obviously influencing the size of the glass display screen, so that the glass display screen is convenient to process and move. The protective film is used for protecting other surfaces from being corroded, and the quality of the product is improved.
It is noted that in other embodiments, the second surface may be protected by applying a coating. Specifically, a protective ink is sprayed or printed on the second surface of the glass sheet, and then the protective ink is thermally or uv cured to form a protective coating layer having a thickness of more than 5 um.
Step S2 is a step of performing surface modification treatment on the glass sheet.
In this embodiment, the glass plate is made of aluminosilicate glass, has a first surface and a second surface opposite to each other, and has a length × width × thickness dimension of 470mm × 370mm × 1.1mm, and the first surface of the glass plate to be processed is subjected to surface modification treatment by a dry powder spraying method. Specifically, the micropowder is mechanically sprayed onto the first surface of the glass sheet such that the first surface of the glass sheet produces a plurality of micropores, each micropore having an area greater than 12.5 square nanometers, the sum of all micropores having an area greater than 1% or more of the area of the first surface of the glass sheet. The micro powder is made of a material with Mohs hardness of more than or equal to 5, and the central particle size of the micro powder is 0.5-30 um.
It should be noted that in other embodiments, the surface modification treatment step can be performed by a mechanical grinding method or a water jet method. The mechanical grinding refers to a process of grinding water, micro powder and other auxiliary materials by using a plane grinding device under a grinding disc and pressure and changing the surface of a glass plate; the water jet method refers to a process of jetting a mixture of water, fine powder, other auxiliary materials, and compressed air onto the glass sheet at a high speed using a wet jetting apparatus.
And step S3, cleaning the glass plate.
Specifically, the glass plate is firstly cleaned by an ultrasonic cleaning machine, then is soaked in RO water for at least 1min, and finally is dried by hot air to remove the moisture on the surface of the glass plate.
In this embodiment, the washing liquid among the ultrasonic cleaner is the solution that mass concentration is pH value 8 ~ 10, can clear away completely the oil stain on glass plate surface improves the cleaning performance.
And step S4, polishing the glass plate.
Specifically, a first surface of the glass plate is subjected to a polishing treatment.
In this embodiment, the first surface of the glass plate is polished by an alkaline polishing method, specifically, the glass plate is placed in a polishing tank containing an alkaline polishing solution, and the polishing treatment is performed for 240min, where the molar concentration of hydroxyl ions in the alkaline polishing solution is 20 mol/L.
Of course, in other embodiments, the first surface of the glass plate may be polished by a mechanical polishing method, i.e., by a polishing liquid containing inorganic oxide particles with a mass percentage of more than 5% and a polishing pad and external mechanical pressure. The acid polishing method can also be adopted to polish the first surface of the glass plate, namely the glass plate is placed in a polishing tank with acid polishing solution to be soaked and polished for 30min, wherein the molar concentration of hydrogen ions in the acid polishing solution is 1.5mol/L, and the molar concentration of fluorine ions in the acid polishing solution is 1 mol/L.
And step S5, cleaning the glass plate.
Specifically, the laminated film on the non-treated side was removed, and then the glass plate was washed with RO water, thereby producing an optical glass having a low-gloss surface as described in example one (see fig. 2). The average visible light transmittance of the optical glass was detected to be more than 87%.
Example four:
the present embodiment provides a method for producing an optical glass, which is used for producing an optical glass having two low-gloss surfaces as described in example two from a glass plate having opposite first and second surfaces to be processed, and comprises the following steps:
step S1 is a step of performing surface modification treatment on the glass sheet.
In this embodiment, the glass plate is made of aluminosilicate glass, has a first surface and a second surface opposite to each other, and has a length × width × thickness dimension of 470mm × 370mm × 1.1mm, and the first surface and the second surface of the glass plate to be processed are subjected to surface modification treatment by a dry powder spraying method. Specifically, the micropowder is sprayed to the first surface and the second surface of the glass plate simultaneously or respectively through mechanical force, so that a large number of micropores are generated on the first surface and the second surface of the glass plate, the area of each micropore is larger than 12.5 square nanometers, and the sum of the areas of all micropores is larger than more than 1 percent of the total area of the first surface and the second surface of the glass plate.
It should be noted that in other embodiments, the surface modification treatment step can be performed by a mechanical grinding method or a water jet method.
And step S2, cleaning the glass plate.
Specifically, the glass plate is firstly cleaned by an ultrasonic cleaning machine, then is soaked in RO water for at least 1min, and finally is dried by hot air to remove the moisture on the surface of the glass plate.
In this embodiment, the cleaning solution in the ultrasonic cleaning machine is a sodium hydroxide solution with a mass concentration of 10%, so that oil stains on the surface of the glass plate can be completely removed, and the cleaning effect is improved.
And step S3, polishing the glass plate.
Specifically, the first surface and the second surface of the glass plate are subjected to polishing treatment.
In this embodiment, the first surface and the second surface of the glass plate are simultaneously polished by an alkaline polishing method, specifically, the glass plate is placed in a polishing tank containing an alkaline polishing solution, and the molar concentration of hydroxide ions in the alkaline polishing solution is 45mol/L, and the glass plate is soaked and polished for 140 min.
Of course, in other embodiments, the first surface and the second surface of the glass plate may be polished by a mechanical polishing method, i.e., the glass plate is polished by a polishing liquid containing inorganic oxide particles with a mass percentage of more than 5% through a polishing disk and an external mechanical pressure. The acid polishing method can also be adopted to polish the first surface and the second surface of the glass plate, namely the glass plate is placed in a polishing tank with acid polishing solution to be soaked and polished for 10min, wherein the molar concentration of hydrogen ions in the acid polishing solution is 8mol/L, and the molar concentration of fluorine ions is 5 mol/L.
And step S4, cleaning the glass plate.
Specifically, the laminated film on the non-treated side was removed, and then the glass plate was washed with RO water, whereby an optical glass having two low-gloss surfaces was produced, and the average visible light transmittance of the optical glass was detected to be more than 84%.
In summary, the optical glass and the preparation method thereof provided by the invention have the following beneficial effects:
1. the optical glass prepared according to the invention does not generate sparkling points under the condition of strong monochromatic backlight, thereby ensuring good visual experience for users, being better suitable for next generation of displays with higher resolution and stronger backlight and having good market prospect.
2. The optical glass prepared according to the invention has the advantages of ultra-thin thickness, light weight, anti-glare property, high strength, low haze, high definition, high resolution and the like.
3. The preparation method of the optical glass provided by the invention is convenient and simple to operate, has low preparation cost and is beneficial to industrial automatic production.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The optical glass conforming to the Kerbelon-like function relationship has the characteristics of high transmittance, no reflection, no projected flash point and low glossiness, and is characterized in that the optical glass has a low glossiness surface, the parallel light reflectivity of the low glossiness surface is less than 3%, the glossiness of a 60-degree reflection part is 5-120, and the average roughness is 10-2000 nm; the average visible light transmittance of the optical glass is greater than 84%, and the haze is 0.5-80; the relationship among haze, average roughness and gloss of the low-gloss surface of the optical glass satisfies the relationship of a quasi-Kerbelon function:
wherein, X is the haze,
y is the average roughness in nm,
z is the gloss value of the glass fiber,
k is a constant and takes a value of 7 +/-3,
the value is 1 when the optical glass has only one of the low-gloss surfaces, and 0.5 ± 0.2 when the optical glass has two of the low-gloss surfaces opposed to each other.
2. The optical glass according to claim 1, wherein in a binary coordinate system having the haze of the optical glass as an abscissa and the gloss of the low-gloss surface as an ordinate, a point formed by the haze of the optical glass and the gloss of the low-gloss surface falls on a curve in a first quadrant of the binary coordinate system, and an absolute value of a slope of the curve gradually decreases in a positive direction of the abscissa.
3. The optical glass according to claim 2, wherein the optical glass has only one surface with low gloss and the average visible light transmittance of the optical glass is more than 87%.
4. A method for producing an optical glass, for producing a glass plate having opposite first and second surfaces to be processed into an optical glass according to the relationship of the kohlrabi-like function as claimed in claim 1, the method comprising: a step of performing surface modification treatment on the glass plate; and a step of polishing the glass plate.
5. The method for producing optical glass according to claim 4, wherein the step of subjecting the glass plate to surface modification treatment is performed by a mechanical grinding method or a dry powder blasting method or a water jet blasting method; the surface modification treatment is to change the surface condition of the glass plate by mechanical force to make the surface of the glass plate generate a plurality of micropores, the area of each micropore is larger than 12.5 square nanometers, and the sum of the areas of all micropores is larger than 1 percent of the area of the modified surface of the glass plate.
6. The method for producing an optical glass according to claim 4, wherein the step of polishing the glass plate is performed by a mechanical polishing method or a chemical polishing method.
7. The process for producing an optical glass according to claim 6,
the mechanical polishing method comprises the following steps: polishing the glass plate by using a polishing solution containing inorganic oxide particles with the mass percentage of more than 5% through a polishing disc and external mechanical pressure;
the chemical polishing method comprises alkaline polishing or acid polishing;
the alkaline polishing comprises: placing the glass plate in a polishing tank with alkaline polishing solution, and soaking and polishing for at most 240min, wherein the molar concentration of hydroxide ions in the alkaline polishing solution is 10-50 mol/L;
the acid polishing comprises: and (2) placing the glass plate in a polishing tank with acidic polishing solution for soaking and polishing for at most 30min, wherein the molar concentration of hydrogen ions in the acidic polishing solution is 0.5-10.5 mol/L, and the molar concentration of fluorine ions in the acidic polishing solution is 0.05-6 mol/L.
8. A process for the production of an optical glass according to claim 4, characterized in that it comprises the following main steps:
protecting the second surface of the glass plate by sticking a film or coating;
performing surface modification treatment on the first surface of the glass plate;
cleaning the glass plate;
and polishing the first surface of the glass plate.
9. A process for the production of an optical glass according to claim 4, characterized in that it comprises the following main steps:
performing surface modification treatment on the first surface and the second surface of the glass plate respectively or simultaneously;
cleaning the glass plate;
and simultaneously polishing the first surface and the second surface of the glass plate.
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| CN201610841609.0A CN107867803B (en) | 2016-09-22 | 2016-09-22 | Optical glass conforming to Kelamolong-like function relation and preparation method thereof |
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| CN107867803B true CN107867803B (en) | 2020-08-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858705A (en) * | 2010-04-30 | 2013-01-02 | 康宁股份有限公司 | Anti-glare surface and method of making |
| CN105102386A (en) * | 2013-03-15 | 2015-11-25 | 肖特玻璃科技(苏州)有限公司 | Chemically toughened flexible ultrathin glass |
| WO2016008752A1 (en) * | 2014-07-16 | 2016-01-21 | Schott Ag | Method for producing a coated substrate, planar substrate, comprising at least two layers applied by means of heating, and the use of the coated substrate |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858705A (en) * | 2010-04-30 | 2013-01-02 | 康宁股份有限公司 | Anti-glare surface and method of making |
| CN105102386A (en) * | 2013-03-15 | 2015-11-25 | 肖特玻璃科技(苏州)有限公司 | Chemically toughened flexible ultrathin glass |
| WO2016008752A1 (en) * | 2014-07-16 | 2016-01-21 | Schott Ag | Method for producing a coated substrate, planar substrate, comprising at least two layers applied by means of heating, and the use of the coated substrate |
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