Glass product, apparatus and method for manufacturing the same, and display device including the same

Abstract

The present application relates to an apparatus for manufacturing glass products, a method for manufacturing glass products, a glass product and a display device including the glass product. The apparatus for manufacturing glass products comprises a plurality of side parts spaced apart from each other and a plurality of heating parts arranged on each of the side parts; wherein the side parts adjacent to each other among the plurality of side parts are arranged to face each other and allow glass to be arranged between the adjacent side parts.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2019-0174122, filed on December 24, 2019, and all rights arising therefrom, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present disclosure relates to an apparatus for manufacturing a glass product, a method for manufacturing a glass product, a glass product, and a display device including the glass product. Background Art

[0004] Glass products are widely used in electronic devices including display devices or building materials. For example, glass products are applied to substrates of flat panel display devices such as liquid crystal displays ("LCD"), organic light emitting displays ("OLED"), and electrophoretic displays ("EPD"), or to cover windows for protecting the substrates.

[0005] As portable electronic devices such as smartphones and tablet personal computers ("PCs") become popular, glass products included in such portable electronic devices are often exposed to external impacts. Therefore, it is desirable to develop a glass product that is thin for easy carrying and can withstand external impacts, and attempts have been made to improve the strength of glass products by thermal strengthening or chemical strengthening. Summary of the invention

[0006] During the manufacturing process of the strengthened glass article, damage such as dents or cracks may occur on the surface of the strengthened glass article, thereby deteriorating the physical properties and / or quality of the strengthened glass article. Such damage may be reduced by heat treatment, but when the strengthened glass article is heat treated, the compressive stress of the strengthened glass article may be reduced, thereby possibly reducing its strength.

[0007] An embodiment of the present disclosure provides an apparatus for manufacturing a glass product, which is capable of heat-treating a strengthened glass product in a short time.

[0008] Embodiments of the present disclosure also provide a method for manufacturing a glass product, which is capable of heat-treating a strengthened glass product in a short time.

[0009] Embodiments of the present disclosure also provide a strengthened glass article that is heat treated in a short period of time.

[0010] An embodiment of the present disclosure also provides a display device including a strengthened glass article that is heat-treated in a short time.

[0011] According to embodiments of an apparatus for manufacturing a glass product and a method for manufacturing a glass product, a strengthened glass product may be efficiently manufactured in a short time, thereby preventing a reduction in compressive stress due to heat treatment of the strengthened glass product.

[0012] In such an embodiment of the glass article and the display device including the glass article, by performing heat treatment in a short time, the glass article can have sufficient strength and a relatively high compressive stress without damage such as dents or cracks.

[0013] According to an embodiment, an apparatus for manufacturing glass products includes a plurality of side portions spaced apart from each other and a plurality of heating portions arranged on each of the side portions; wherein adjacent side portions adjacent to each other among the plurality of side portions are arranged to face each other and allow glass to be arranged between the adjacent side portions.

[0014] In an embodiment, the heating rate may be about 40 Kelvin / minute (K / min) or greater.

[0015] In embodiments, the heating rate of the device may be variable.

[0016] In an embodiment, each of the heat supply portions may have a size of about 2 square centimeters (cm 2 ) or larger in size and may include halogen lamps.

[0017] In an embodiment, the heat supply portions on one of the side portions may be arranged in a matrix form in a first direction and in a second direction intersecting the first direction, and the side portion may include a heat conductive material.

[0018] In an embodiment, the thermally conductive material has a thermal conductivity of about 200 Watts per meter-Kelvin (W / mk) or greater, and the thermally conductive material may include aluminum or graphene.

[0019] In an embodiment, each of the side portions may include a first side portion and a second side portion, wherein the second side portion is disposed between the first side portion and the heat supply portion on the second side portion.

[0020] In an embodiment, in a plan view, the first side portion and the second side portion have the same size as each other.

[0021] In an embodiment, the second side portion may include a thermally conductive material.

[0022] In an embodiment, the second side portion includes a plurality of side patterns each having a linear shape extending in the first direction, adjacent side patterns of the plurality of side patterns adjacent to each other are spaced apart from each other in the second direction, and the side patterns are disposed to overlap the heat supply portion.

[0023] In an embodiment, a heat supply portion provided on one of the side patterns and a heat supply portion provided on the other of the side patterns may be operated independently of each other.

[0024] In an embodiment, the second side portion may further include a connection portion connecting adjacent side patterns spaced apart from each other in the second direction to each other.

[0025] In an embodiment, the side portions may be regularly arranged with the same spacing distance therebetween, and the spacing distance between adjacent side portions may be in a range of about 1 centimeter (cm) to about 2 cm.

[0026] In an embodiment, the apparatus may further comprise a support portion supporting the side portion.

[0027] In an embodiment, grooves may be defined in the surface of the support portion between adjacent side portions.

[0028] In an embodiment, a spacing distance between the groove and one of the adjacent side portions may be equal to a spacing distance between the groove and another of the adjacent side portions.

[0029] In an embodiment, the apparatus may further include a fixing portion fixing the glass disposed between the adjacent side portions.

[0030] According to another embodiment, a method for manufacturing a glass product includes: forming glass; strengthening the formed glass; and heat-treating the strengthened glass using a glass product manufacturing apparatus. In such an embodiment, the glass product manufacturing apparatus includes a plurality of side portions spaced apart from each other and a plurality of heat supply portions provided on each of the side portions, and adjacent side portions of the plurality of side portions of the glass product manufacturing apparatus that are adjacent to each other are provided to face each other.

[0031] In embodiments, heat treating the strengthened glass may include placing the strengthened glass between adjacent side portions of a glass product manufacturing apparatus and raising the temperature of the glass product manufacturing apparatus to heat treat the strengthened glass.

[0032] In embodiments, increasing the temperature of the glassmaking equipment may include varying a heating rate of the glassmaking equipment.

[0033] According to another embodiment, a glass article includes: a first surface; a second surface opposite the first surface; a first compression region extending from the first surface to a point at a first compression depth; a second compression region extending from the second surface to a point at a second compression depth; and a tensile region disposed between the first compression region and the second compression region, wherein the glass article has a glass transition temperature higher than the glass transition temperature of a glass article heat treated at a heating rate in a range of about 10 K / min to about 30 K / min.

[0034] In an embodiment, the glass article may further include: a first portion extending in a first direction; and a second portion extending in the first direction and separated from the first portion in a second direction intersecting the first direction, wherein the glass transition temperature of the first portion and the glass transition temperature of the second portion may be different from each other.

[0035] According to another embodiment, a display device includes: a display panel including a plurality of pixels; a cover window disposed on the display panel; and an optically transparent bonding layer disposed between the display panel and the cover window. In such an embodiment, the cover window includes: a first surface; a second surface opposite the first surface; a first compression region extending from the first surface to a point at a first compression depth; a second compression region extending from the second surface to a point at a second compression depth; and a stretching region disposed between the first compression region and the second compression region, wherein the glass transition temperature of the cover window is higher than the glass transition temperature of the glass article heat-treated at a heating rate in the range of about 10K / min to about 30K / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other features of the present disclosure will become more apparent by describing in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0037] Figure 1 is a perspective view of an apparatus for manufacturing a glass product according to an exemplary embodiment;

[0038] Figure 2 It is along Figure 1 A cross-sectional view taken along line II';

[0039] Figure 3 yes Figure 1 Plans of the side and heating parts;

[0040] Figure 4 is a cross-sectional view showing manufacturing of a glass product using an apparatus for manufacturing a glass product according to an exemplary embodiment;

[0041] Figure 5is a cross-sectional view of a side portion and a heating portion according to an alternative exemplary embodiment;

[0042] Figure 6 is a plan view of a side portion and a heating portion according to another alternative exemplary embodiment;

[0043] Figure 7 It is along Figure 6 A cross-sectional view taken along line II-II';

[0044] Figure 8 is a plan view of a side portion and a heating portion according to yet another alternative exemplary embodiment;

[0045] Fig. 9 is a plan view of a side portion and a heating portion according to yet another alternative exemplary embodiment;

[0046] Fig.10 is a plan view of a side portion and a heating portion according to yet another alternative exemplary embodiment;

[0047] Fig.11 is a cross-sectional view of a glass product manufacturing apparatus according to yet another alternative exemplary embodiment;

[0048] Fig.12 is a cross-sectional view of a glass product manufacturing apparatus according to yet another alternative exemplary embodiment;

[0049] Fig.13 is a flow chart illustrating a method for manufacturing a glass article according to an exemplary embodiment;

[0050] Fig.14 is a cross-sectional view of the glass article after a strengthening step;

[0051] Fig.15 It is shown in Fig.14 A graph of stress distribution of a glass article after a strengthening step;

[0052] Fig.16 is a schematic diagram illustrating an ion exchange process according to an exemplary embodiment;

[0053] Fig.17 is a graph showing stress distribution of a glass article after a heat treatment step according to an exemplary embodiment, stress distribution of a glass article before heat treatment, and stress distribution of a glass article after a heat treatment step according to a comparative example;

[0054] Fig.18 is a perspective view of a glass article according to various embodiments;

[0055] Fig.19is a cross-sectional view showing an exemplary embodiment of applying a glass article to a cover window of a display device;

[0056] Fig. 20 is a plan view of a glass article according to an alternative exemplary embodiment; and

[0057] Fig.21 is a plan view of a glass article according to another alternative exemplary embodiment. DETAILED DESCRIPTION

[0058] The specific structure and function description of the embodiments of the present invention disclosed herein are only for the purpose of illustrating the embodiments of the present invention. Without departing from the spirit and salient features of the present invention, the present invention can be implemented in a variety of different forms. Therefore, the embodiments of the present invention are disclosed only for the purpose of illustration and should not be construed as limiting the present invention. That is, the present invention is limited only by the scope of the claims.

[0059] It will be understood that when an element is referred to as being associated with another element, such as being "coupled" or "connected" to another element, the element may be coupled or connected to the other element, or there may be intervening elements between the element and the other element. Conversely, it will be understood that when an element is referred to as being associated with another element, such as being "directly coupled" or "directly connected" to another element, there are no intervening elements. Other expressions describing the relationship between elements (such as, "between," "directly between," "adjacent to," or "directly adjacent to") should be interpreted in the same manner.

[0060] Throughout the specification, the same reference numerals will refer to the same or like parts.

[0061] It will be understood that, although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings herein, the "first element", "first component", "first region", "first layer" or "first part" discussed below may be referred to as a second element, second component, second region, second layer or second part.

[0062] The terms used herein are only for the purpose of describing a specific embodiment, and are not intended to be limited. As used herein, "one", "the", "at least one" do not represent the limitation of quantity, and are intended to include both the singular and the plural, unless the context clearly indicates otherwise. For example, "an element" has the same meaning as "at least one element", unless the context clearly indicates otherwise. "At least one" will not be interpreted as limiting "one" or "one". "Or" means "and / or". As used herein, the term "and / or" includes any and all combinations of one or more of the relevant listed items. It will also be understood that the term "comprising" and / or "comprising" or "comprising" and / or "comprising" when used in this specification specifies the existence of stated features, regions, entireties, steps, operations, elements and / or components, but does not exclude the existence or addition of one or more other features, regions, entireties, steps, operations, elements, components and / or groups.

[0063] In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. It will be understood that, in addition to the orientations depicted in the accompanying drawings, relative terms are intended to include different orientations of the device. For example, if the device in one of the accompanying drawings is turned over, the element described as being on the "lower" side of the other elements will then be oriented on the "upper" side of the other elements. Therefore, depending on the specific orientation of the accompanying drawings, the exemplary term "lower" may include both "lower" and "upper" orientations. Similarly, if the device in one of the accompanying drawings is turned over, the element described as being "below" or "below" the other elements will then be oriented "above" the other elements. Therefore, the exemplary term "below" or "below" may include both upper and lower orientations.

[0064] As used herein, "about" or "approximately" includes the stated value and the mean within an acceptable deviation range of the particular value as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0065] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and disclosure, and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such in this article.

[0066] Exemplary embodiments are described herein with reference to schematically illustrated cross-sectional views as idealized embodiments. As such, deviations from the illustrated shapes due to, for example, manufacturing techniques and / or tolerances are expected. Therefore, the embodiments described herein should not be construed as being limited to the specific shapes of the regions shown herein, but will include shape deviations, for example, caused by manufacturing. For example, a region shown or described as flat may typically have rough and / or nonlinear features. In addition, the sharp corners shown may be rounded. Therefore, the regions shown in the figures are schematic in nature, and their shapes are not intended to illustrate the precise shapes of the regions, and are not intended to limit the scope of the claims.

[0067] As used herein, the term "glass article" refers to an article made entirely or partially of glass.

[0068] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0069] Figure 1 is a perspective view of an apparatus for manufacturing a glass product according to an exemplary embodiment.

[0070] Reference Figure 1 , an embodiment of the apparatus 10 for manufacturing glass products may include a heat supply portion 20, a side portion 30, and a support portion 40. The support portion 40 may be used to support the heat supply portion 20 and the side portion 30. The support portion 40 may include a thermally conductive material. The support portion 40 may be a flat plate having side edges extending along a first direction DR1 and a second direction DR2 intersecting the first direction DR1. The planar shape of the support portion 40 may be a rectangular shape. In an embodiment in which the planar shape of the support portion 40 is a rectangular shape, the support portion 40 may include a short side extending along the first direction DR1 and a long side extending along the second direction DR2. However, the present disclosure is not limited thereto, and the short side direction and the long side direction of the support portion 40 may be opposite or changed to be opposite.

[0071] In alternative embodiments, the planar shape of the support portion 40 may be square, circular, elliptical or other polygonal shapes.

[0072] The support portion 40 may serve to support the side portion 30 and the heat supply portion 20 which will be described later.

[0073] The support portion 40 may include a groove H recessed from a surface thereof in a thickness direction. The groove H may be defined by a portion of the support portion 40 recessed from a surface of the support portion 40 in a thickness direction. The groove H may be a portion to which a glass product to be heat-treated by the glass product manufacturing apparatus 10 is fixed. In such an embodiment, the glass product to be heat-treated by the glass product manufacturing apparatus 10 may be fixed by the groove H.

[0074] The groove H may be provided between adjacent side portions 30. A spacing distance from the groove H to the adjacent side portion 30 on one side may be the same as a spacing distance from the groove H to the adjacent side portion 30 on the opposite side.

[0075] The side portion 30 may be physically connected to the support portion 40. The side portion 30 may extend from the support portion 40 along the thickness direction (or the third direction DR3). The side portion 30 may be arranged in a direction perpendicular to the support portion 40. The planar shape of the side portion 30 may be a rectangular shape. In an embodiment, in the case where the planar shape of the side portion 30 is a rectangular shape, the side portion 30 may include a short side extending along the first direction DR1 and a long side extending along the third direction DR3. However, the present disclosure is not limited thereto, and the short side direction and the long side direction of the side portion 30 may be opposite or changed to be opposite.

[0076] In alternative embodiments, the planar shape of the side portion 30 may be square, circular, oval, or other polygonal.

[0077] The side portion 30 may be provided in plurality. The plurality of side portions 30 may be spaced apart from each other along the second direction DR2. Adjacent side portions 30 among the plurality of side portions 30 spaced apart along the second direction DR2 may be provided to face each other or be parallel to each other.

[0078] The plurality of side portions 30 may be regularly arranged to have the same or constant interval distance, or be spaced apart from each other by the same interval distance along the second direction DR2. For example, the interval distance between adjacent side portions 30 may be in the range of about 1 centimeter (cm) to about 2 cm.

[0079] The side portion 30 may include a thermally conductive material. In an embodiment, the side portion 30 including the thermally conductive material may have a thermal conductivity of about 40 Watts per meter-Kelvin (W / mK) or greater, about 60 W / mK or greater, about 100 W / mK or greater, about 200 W / mK or greater, about 237 W / mK or greater, or about 5000 W / mK or greater. In such an embodiment, the side portion 30 may include a material having a thermal conductivity of about 40 W / mK or greater, about 60 W / mK or greater, about 100 W / mK or greater, about 200 W / mK or greater, about 237 W / mK or greater, or about 5000 W / mK or greater.

[0080] In an embodiment, the thermally conductive material of the side portion 30 may include metal or graphene. In such an embodiment, the metal may include, for example, molybdenum (Mo), aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), titanium (Ti), tantalum (Ta), tungsten (W), copper (Cu), etc. In one embodiment, for example, the thermally conductive material of the side portion 30 may be aluminum (Al).

[0081] The side portion 30 may be used to smoothly heat-treat the glass article by including a heat conductive material.

[0082] Figure 1 An embodiment in which the number of the side parts 30 is six is ​​shown, but is not limited thereto. Alternatively, the number of the side parts 30 may be modified variously, for example, to two to five or seven or more.

[0083] In an embodiment, if Figure 1 As shown in FIG. 1 , among the plurality of side portions 30 , the side portions 30 respectively disposed at one end and the other end of the support portion 40 in the second direction DR2 may be respectively aligned with the side surface of the support portion 40 along the third direction DR3 .

[0084] The heating portion 20 may be provided on the side portion 30. The heating portion 20 may be provided on the side surface of the side portion 30. The heating portion 20 may be provided in plural, and the heating portions 20 provided on the side portions 30 (also referred to as the outermost side portions 30) respectively provided at one end and the other end of the support portion 40 in the second direction DR2 may be provided on the inner side surface thereof. The heating portion 20 provided on the side portion 30 provided between the outermost side portions 30 may be provided on one side surface and the other side surface of each of the side portions 30 provided between the outermost side portions 30.

[0085] However, the present disclosure is not limited thereto, and the heat supply portion 20 disposed on the outermost side portion 30 may also be disposed on one side surface and the other side surface of each of the outermost side portions 30 .

[0086] The heat supply portion 20 provided on any one of one side surface and the other side surface of one side portion 30 may be provided in plurality. The plurality of heat supply portions 20 provided on any one of one side surface and the other side surface of one side portion 30 may be arranged in a matrix form. In one embodiment, for example, the plurality of heat supply portions 20 provided on any one of one side surface and the other side surface of one side portion 30 may be arranged in a matrix form having rows in a first direction DR1 and columns in a third direction DR3.

[0087] although Figure 1 An embodiment is shown in which a plurality of heating portions 20 provided on either one side surface or the other side surface of a side portion 30 are arranged in a matrix form having six rows and three columns (i.e., three heating portions are arranged along a first direction DR1, and six heating portions are arranged along a third direction DR3), but the present disclosure is not limited thereto.

[0088] In an embodiment, if Figure 1 As shown in FIG. 1 , the heat supply portions 20 adjacent to each other along the first direction DR1 may contact each other, but are not limited thereto. Alternatively, the heat supply portions 20 adjacent to each other along the first direction DR1 may be spaced apart from each other at a predetermined interval.

[0089] The heat supply portion 20 can be used to provide heat to the glass product and the side portion 30 on which the heat supply portion 20 is disposed. In such an embodiment, heat can be directly provided to the glass product by the heat supply portion 20, and heat can also be provided to the glass product by the side portion 30 including a heat conductive material and provided with heat by the heat supply portion 20.

[0090] The heating rate of the heat supply portion 20 may be variable or controlled.

[0091] In an embodiment, the planar shape of the heat supply portion 20 may be as follows: Figure 1 However, the present disclosure is not limited thereto, and alternatively, the planar shape of the heat supply portion 20 may be a circular shape, a quadrilateral shape, or other polygonal shapes.

[0092] The planar size of the heating portion 20 may be about 2 square centimeters (cm 2 ) or greater, but not limited thereto.

[0093] In an embodiment, a conventional device capable of providing heat may be applied as the heating portion 20. In an embodiment, the heating portion 20 may be, for example, a halogen lamp, an incandescent bulb, a three-wavelength lamp, a light emitting diode ("LED") lamp, etc. In one embodiment, for example, the heating portion 20 may include a halogen lamp.

[0094] All the heat supply parts 20 arranged on the side part 30 may be simultaneously turned on or off in response to the on / off signal. However, the present disclosure is not limited thereto.

[0095] Figure 2 It is along Figure 1 A cross-sectional view taken along line II'.

[0096] Reference Figure 2In an embodiment, the width w1 of the groove H in the second direction DR2 may vary according to the width of the glass product to be heat-treated by the glass product manufacturing apparatus 10. In an embodiment, the width of the glass product heat-treated by the glass product manufacturing apparatus 10 may be, but is not limited to, in the range of about 0.1 millimeter (mm) to about 2 mm, about 0.8 mm or less, about 0.75 mm or less, about 0.7 mm or less, about 0.6 mm or less, about 0.65 mm or less, about 0.5 mm or less, about 0.3 mm or less, for example, in the range of 0.45 mm to 0.8 mm, in the range of about 0.5 mm to about 0.75 mm, or in the range of about 0.03 mm to about 0.15 mm.

[0097] Since the groove H is used to fix the glass product to be heat-treated by the glass product manufacturing apparatus 10 as described above, the width w1 of the groove H may be equal to the width of the glass product. Therefore, in an embodiment, the width w1 of the groove H may be in the range of about 0.1 mm to about 2 mm, about 0.8 mm or less, about 0.75 mm or less, about 0.7 mm or less, about 0.6 mm or less, about 0.65 mm or less, about 0.5 mm or less, about 0.3 mm or less, for example, in the range of about 0.45 mm to about 0.8 mm, or in the range of about 0.5 mm to about 0.75 mm.

[0098] The spacing distance d1 from the groove H to the adjacent side portion 30 located on one side in the second direction DR2 may be substantially the same as the spacing distance d2 from the groove H to the adjacent side portion 30 located on the other side in the second direction DR2. The term "substantially the same" as used herein may include not only the case where the spacing distance d1 from the groove H to the adjacent side portion 30 located on the one side is completely equal to the spacing distance d2 from the groove H to the adjacent side portion 30 located on the other side, but also the case where the difference due to a manufacturing process error is within about 20%.

[0099] Figure 3 yes Figure 1 Plan view of the side section and heating section.

[0100] Reference Figure 3In an embodiment, as described above, the heat supply portion 20 provided on one side surface and one of the other side surfaces of one side portion 30 may be provided in plurality. In such an embodiment, the plurality of heat supply portions 20 provided on one side surface and one of the other side surfaces of one side portion 30 may be arranged in a matrix form. In an embodiment, for example, the plurality of heat supply portions 20 provided on one side surface and one of the other side surfaces of one side portion 30 may be arranged in a matrix form having rows in a first direction DR1 and columns in a third direction DR3. Although Figure 3 An embodiment is shown in which a plurality of heat supply portions 20 provided on one side surface and one of the other side surfaces of one side portion 30 are arranged in a matrix form, so that three heat supply portions are arranged along the first direction DR1, and six heat supply portions are arranged along the third direction DR3, but the present disclosure is not limited thereto. In an embodiment, the heat supply portions 20 adjacent to each other along the first direction DR1 may contact each other, but are not limited thereto. Alternatively, the heat supply portions 20 adjacent to each other along the first direction DR1 may be spaced apart from each other at a predetermined interval.

[0101] Figure 4 is a cross-sectional view illustrating manufacturing of a glass product using an apparatus for manufacturing a glass product according to an exemplary embodiment.

[0102] Reference Figure 4 , the glass article 100 may be assembled and fixed into the groove H of the support part 40 of the glass article manufacturing apparatus 10. The glass article 100 may be a strengthened glass article. The glass article 100 may be disposed and fixed between adjacent side parts 30 (disposed and fixed between the heat supply parts 20 disposed respectively between the adjacent side parts 30). The recessed depth of the groove H is a predetermined depth that allows the glass article 100 to be fixed therein. In such an embodiment, the corresponding portion of the glass article 100 inserted into the groove H may be provided with less heat from the adjacent heat supply part 20 and the side part 30 compared to the remaining portion of the glass article 100 not disposed in the groove H. Considering effective fixation of the glass article 100 and uniform heat supply to the glass article 100, the recessed depth of the groove H is in the range of about 5% to about 30%, or about 10% to about 20% of the length of the glass article 100 in the third direction DR3.

[0103] In an embodiment, in the glass product that has been heat-treated by the glass product manufacturing apparatus 10 , a corresponding portion inserted into the groove H may be cut away, which is less heat-treated than the remaining portion.

[0104] During transportation or due to impurities in the molten salt used for strengthening on the surface of the strengthened glass product, damage such as dents or cracks may occur on the surface of the strengthened glass product. The damage may reduce the physical properties and / or quality of the glass product. In an embodiment, the glass product manufacturing equipment 10 including a heating part 20 having a halogen lamp capable of performing rapid heating can perform rapid high-temperature heat treatment on the glass product, thereby reducing damage on the surface of the strengthened glass product. In such an embodiment, in the glass product manufacturing equipment 10, the side parts 30 that receive the heat supplied from the heating part 20 and are respectively located on one side and the other side of the glass product include a material with high thermal conductivity or are made of a material with high thermal conductivity. Therefore, by applying heat to the entire surface of the glass product in a shorter time, damage can be effectively reduced.

[0105] The heating rate of the glass product manufacturing apparatus 10 may be determined by the heat supplying portion 20 and the side portion 30 to which heat is supplied from the heat supplying portion 20 to spread the heat. In an embodiment, the heating rate of the glass product manufacturing apparatus 10 may be about 40K / min or more, or about 60K / min or more, or about 80K / min or more, or about 100K / min or more. Since the glass product manufacturing apparatus 10 has such a high heating rate, surface damage of the strengthened glass product may be easily mitigated.

[0106] Hereinafter, an alternative embodiment of the glass product manufacturing apparatus 10 will be described. The same or similar elements in the alternative embodiment have been used as those in the above reference. Figures 1 to 4 Reference numerals identical to those used to describe the embodiments are used to mark the same reference numerals, and any repeated detailed description of the same or similar elements will be omitted or simplified hereinafter.

[0107] Figure 5 is a cross-sectional view of a side portion and a heat supply portion according to an alternative exemplary embodiment.

[0108] In addition to the side portion 31 being divided into a first side portion 31a and a second side portion 31b, Figure 5 The side part and heating part of the glass product manufacturing equipment shown in Figure 2 The side portions and the heating portion of the glassware manufacturing apparatus 10 shown in FIG. 1 are substantially the same.

[0109] In an embodiment of the glass product manufacturing apparatus, Figure 5 As shown in FIG, the side portion 31 may be divided into a first side portion 31 a and a second side portion 31 b.

[0110] The first side portion 31a and the second side portion 31b may include materials different from each other. The first side portion 31a may be used to support the second side portion 31b, or to provide a support member on which the second side portion 31b is disposed. The first side portion 31a may be a plate with low thermal conductivity. Since the first side portion 31a provides a support member on which the second side portion 31b is disposed, the material of the first side portion 31a is not limited to any specific material.

[0111] The second side portion 31b may be disposed on one side surface and the other side surface of the first side portion 31a, respectively. The second side portion 31b may include the above reference Figures 1 to 3 At least one of the listed materials for the side portion 30. In such an embodiment, the second side portion 31b may include a material having high thermal conductivity.

[0112] The planar shape of the first side portion 31a may be substantially the same as the planar shape of the second side portion 31b. Figures 1 to 3 The side portions 30 are described to have the same planar shape, and thus the planar size of the first side portion 31 a may be the same as the planar size of the second side portion 31 b .

[0113] The second side portion 31 b may be disposed on the first side portion 31 a via a coating or an adhesive, but is not limited thereto.

[0114] Figure 6 is a plan view of a side portion and a heating portion according to another alternative exemplary embodiment. Figure 7 It is along Figure 6 A cross-sectional view taken along line II-II'.

[0115] In addition to the second side portion 31b_1 including a side pattern having a linear shape extending along the first direction DR1, the side pattern is provided in plural and adjacent side patterns are spaced apart from each other along the third direction DR3, Figure 6 and Figure 7 The side part and heating part of the glass product manufacturing equipment shown in Figure 5 The side sections and the heating section of the glassware manufacturing equipment shown in FIG. 1 are substantially the same.

[0116] In an embodiment, if Figure 6 and Figure 7 As shown in FIG. 1 , the second side portion 31 b_1 may include a side pattern having a linear shape extending along the first direction DR1 , the side pattern may be provided in plurality, and adjacent side patterns may be spaced apart from each other along the third direction DR3 .

[0117] The side patterns may be disposed to overlap the plurality of heat supply portions 20 arranged along the first direction DR1 , respectively.

[0118] The heat supply portion 20 provided on one of the side patterns and the heat supply portion 20 provided on the other side pattern may operate independently or differently from each other. In such an embodiment, as described above, since the side patterns are spaced apart along the third direction DR3 and the first side portion 31a includes a material having low thermal conductivity, the heat supplied from the heat supply portion 20 provided on different side patterns may not be substantially transferred to the adjacent side pattern.

[0119] In an embodiment, when the heat supply portion 20 provided on one of the side patterns is turned on, the heat supply portion 20 provided on the other side pattern may be turned off. Therefore, when a certain portion of the strengthened glass article is dented or cracked, the heat supply portion 20 may be operated only in the dented or cracked portion, thereby reducing power consumption.

[0120] In one embodiment, for example, the heat supply portion 20 disposed on one of the side patterns and the heat supply portion 20 disposed on the other side pattern may be operated at heating rates different from each other.

[0121] As will be described later, the heating rate of the heat supply portion may change the viscosity of the glass article to be heat-treated. The increased viscosity of the glass article that changes during heat treatment may affect glass properties and cause stress relaxation. Stress relaxation may increase resistance to external impact and prevent the propagation of cracks generated due to external impact.

[0122] Figure 8 is a plan view of a side portion and a heating portion according to another alternative exemplary embodiment.

[0123] In addition to the side patterns of the second side portion 31b_2 spaced apart from each other along the third direction DR3 being physically connected by the connection portion, Figure 8 The side part and heating part of the glass product manufacturing equipment shown in Figure 6 and Figure 7 The side sections and the heating section of the glassware manufacturing equipment shown in FIG. 1 are substantially the same.

[0124] In an embodiment of the glass product manufacturing apparatus, Figure 8 As shown in FIG, side patterns of the second side portion 31 b_2 spaced apart from each other along the third direction DR3 may be physically connected by a connection portion.

[0125] although Figure 8An embodiment is shown in which the side patterns of adjacent second side portions 31b_2 are physically connected by one connection portion, but the present disclosure is not limited thereto. The adjacent second side portions 31b_2 may be physically connected by two or more connection portions.

[0126] Fig. 9 is a plan view of a side portion and a heating portion according to still another alternative exemplary embodiment.

[0127] Except that the side pattern extends in the third direction DR3, Fig. 9 The side part and heating part of the glass product manufacturing equipment shown in Figure 6 The side sections and the heating section of the glassware manufacturing equipment shown in FIG. 1 are substantially the same.

[0128] In an embodiment of a glass product manufacturing apparatus, Fig. 9 As shown in FIG. 3 , an extension direction of the side pattern of the second side portion 31 b_3 may be the third direction DR3 , and a plurality of side patterns may be spaced apart from each other along the first direction DR1 .

[0129] In such an embodiment, other features are the same as those mentioned above. Figure 6 Those features described are the same, and therefore, any repeated detailed description of these features will be omitted.

[0130] Fig.10 is a plan view of a side portion and a heating portion according to still another alternative exemplary embodiment.

[0131] In addition to the side patterns of the second side portion 31b_4 that are spaced apart from each other along the first direction DR1 being physically connected by the connection portion, Fig.10 The side part and heating part of the glass product manufacturing equipment shown in Fig. 9 The side sections and the heating section of the glassware manufacturing equipment shown in FIG. 1 are substantially the same.

[0132] In an embodiment of a glass product manufacturing apparatus, Fig.10 As shown in FIG. 3 , the side patterns of the second side portions 31 b_4 spaced apart from each other along the first direction DR1 may be physically connected by a connection portion.

[0133] although Fig.10 An embodiment is shown in which the side patterns of adjacent second side portions 31b_4 are physically connected by two or more connection portions, but the present disclosure is not limited thereto. Alternatively, the side patterns of adjacent second side portions 31b_4 may be physically connected by one connection portion.

[0134] Fig.11 is a cross-sectional view of a glass product manufacturing apparatus according to yet another alternative exemplary embodiment.

[0135] In addition to the glass product manufacturing apparatus 10_1 further including a fixing portion 50 for fixing the strengthened glass product 100 to the groove H of the supporting portion 40, Fig.11 The glass product manufacturing equipment 10_1 shown in FIG. Figures 1 to 4 The glassware manufacturing apparatus 10 shown in FIG. 1 is substantially the same.

[0136] In an embodiment, the glass product manufacturing apparatus 10_1 may further include a fixing portion 50 for fixing the strengthened glass product 100 into the groove H of the support portion 40 .

[0137] The fixing portion 50 may be provided on the other side of the glass article 100 opposite to the side fixed to the groove H. The fixing portion 50 may serve to hold both surfaces of the glass article 100 (i.e., both surfaces each facing the adjacent side portion 30 and opposite to each other) so as to fix the glass article 100 without bending.

[0138] Fig.12 is a cross-sectional view of a glass product manufacturing apparatus according to yet another alternative exemplary embodiment.

[0139] In addition to the support portion 40_1 not including a groove, Fig.12 The glass product manufacturing equipment 10_2 shown in Fig.11 The glass product manufacturing apparatus 10_1 shown in FIG. 1 is substantially the same.

[0140] In such Fig.12 In the embodiment of the glass product manufacturing apparatus 10_2 shown in FIG, the support portion 40_1 may not include a groove. In such an embodiment, the surface of the support portion 40_1 may be flat. The glass product 100 may be placed in an upright position along the thickness direction (third direction DR3) from the surface of the flat support portion 40_1.

[0141] Hereinafter, an embodiment of a method for manufacturing a glass product using the above-described glass product manufacturing apparatus will be described. In an embodiment of a method for manufacturing a glass product using the glass product manufacturing apparatus, the same or similar elements as those in the above reference are used. Figures 1 to 12 Reference numerals identical to those used to describe the embodiments of the glass product manufacturing apparatus are used throughout, and any repeated detailed description of the same or similar elements will be omitted or simplified hereinafter.

[0142] Fig.13 is a flow chart illustrating a method for manufacturing a glass article according to an exemplary embodiment. Fig.14 is a cross-sectional view of the glass article after the strengthening step. Fig.15 It is shown in Fig.14 A graph showing the stress distribution of a glass article after a strengthening step. Fig.16 is a schematic diagram illustrating an ion exchange process according to an exemplary embodiment. Fig.17 is a graph showing stress distribution of a glass article after a heat treatment step according to an exemplary embodiment, stress distribution of a glass article before heat treatment, and stress distribution of a glass article after a heat treatment step according to a comparative example.

[0143] Reference Figures 13 to 17 , an embodiment of the method for manufacturing a glass product may include: strengthening the glass product, i.e., a strengthening step (S1); and performing heat treatment on the strengthened glass product, i.e., a heat treatment step (S2). Before the strengthening step S1 of the glass product, a forming step, a cutting step, and a polishing step may be further performed.

[0144] The shaping step may include preparing a glass composition and shaping the glass composition.

[0145] The glass composition may include various compositions known in the art. In an exemplary embodiment, the glass composition may include a lithium-alumina-silicon ("LAS") glass ceramic including lithium aluminosilicate. In one embodiment, for example, the glass composition may include 50 mol% to 80 mol% SiO 2 , 1 mol% to 30 mol% Al 2 O 3 , 0 mol% to 5 mol% B 2 O 3 , 0 mol% to 4 mol% P 2 O 5 , 3 mol% to 20 mol% Li 2 O, 0 mol% to 20 mol% Na 2 O, 0 mol% to 10 mol% K 2 O, 3 mol% to 20 mol% MgO, 0 mol% to 20 mol% CaO, 0 mol% to 20 mol% SrO, 0 mol% to 15 mol% BaO, 0 mol% to 10 mol% ZnO, 0 mol% to 1 mol% TiO 2 and 0 mol% to 8 mol% ZrO 2 .

[0146] As used herein, the term "content is 0 mol%" means that it does not substantially contain the corresponding component. As used herein, the term "(composition) does not substantially contain (certain component)" means that the certain component is not intentionally contained in the raw material, etc., and includes, for example, the case where a very small amount (e.g., 0.1 mol% or less) of impurities is inevitably contained.

[0147] Hereinafter, each component of the glass composition will be described in detail. In the glass composition, SiO 2 It constitutes the skeleton of glass, can increase chemical durability, and can be used to reduce the occurrence of cracks when scratches (depressions) are formed on the glass surface. In an embodiment, SiO may be included in an amount of about 50 mol% or more. 2 , to effectively form a glass frame, increase chemical durability, and reduce the generation of cracks. In such an embodiment, SiO may be included in the glass composition in an amount of about 80 mol% or less. 2 To show sufficient solubility.

[0148] Al 2 O 3 Used to improve the breakage resistance of glass. 2 O 3 It can be used to generate fewer fragments when the glass breaks. 2 O 3 Can be used as an active component that improves the ion exchange performance during chemical strengthening and increases the surface compressive stress after strengthening. 2 O 3 The content of Al is about 1 mol% or more, so that the above functions can be effectively performed. 2 O 3 The content of C is about 30 mol% or less to maintain the acid resistance and fusibility of the glass.

[0149] B 2 O 3 Enhance the resistance of glass to breakage and improve the fusibility of glass. In an embodiment, B may be omitted 2 O 3 (0 mol%). Alternatively, B may be included in an amount of about 0.5 mol% or more. 2 O 3 , to further improve the solubility of the glass. In such an embodiment, B may be included in an amount of about 5 mol% or less. 2 O 3 , to suppress the appearance of streaks during melting.

[0150] P 2 O 5Improve ion exchange performance and resistance to fragmentation. In an embodiment, P can be omitted 2 O 5 (0 mol%). Alternatively, P may be included in an amount of about 0.5 mol% or more. 2 O 5 In such an embodiment, P may be included in an amount of about 4 mol% or less. 2 O 5 to prevent a significant reduction in breakage resistance and acid resistance.

[0151] Li 2 O is used to form surface compressive stress through ion exchange. Li ions near the glass surface can be exchanged with Na ions, etc. through the ion exchange process. 2 O can also be used to improve the breakage resistance of glass. For efficient ion exchange, Li 2 The content of O is about 3 mol% or more, and for effective acid resistance, Li 2 The content of O may be 20 mol% or less.

[0152] Na 2 O is used to form surface compressive stress through ion exchange and improve the solubility of the glass. Na ions near the glass surface can be exchanged with K ions or the like through an ion exchange process. In an embodiment, Na 2 O (0 mol%). Alternatively, Na 2 The content of O may be 1 mol% or more to effectively exert the above-mentioned effects. In an embodiment in which only the Li and Na ion exchange processes are performed without performing the K ion exchange process, in order to smoothly perform the Li and Na ion exchange, Na 2 The content of O may be about 8 mol% or less. In an embodiment in which a K ion exchange process is also performed, a larger amount of Na 2 However, in such an embodiment, for effective acid resistance, Na 2 The content of O may be about 20 mol% or less.

[0153] K 2 O improves ion exchange performance and is related to breakage resistance. In an embodiment, K may be omitted 2 O (0 mol%). Optionally, K may be included in an amount of about 0.5 mol% or more. 2 O to improve ion exchange performance. In such an embodiment, K 2 The content of O may be about 10 mol% or less to prevent excessive reduction in breakage resistance.

[0154] MgO is used to increase surface compressive stress and improve the breakage resistance of chemically strengthened glass. In an embodiment, the content of MgO is about 3 mol% or more to effectively increase surface compressive stress and improve the breakage resistance of chemically strengthened glass. In such an embodiment, MgO may be included in an amount of about 20 mol% or less to reduce the occurrence of devitrification during glass melting.

[0155] CaO is used to improve the fusibility and breakage resistance of the glass. In an embodiment, CaO (0 mol%) may be omitted. Alternatively, about 0.5 mol% or less of CaO may be included to effectively improve the fusibility and breakage resistance of the glass. If the content of CaO is too large, the ion exchange performance may be reduced, and therefore, the content of CaO may be about 20 mol% or less.

[0156] Similar to CaO, SrO is used to improve the solubility and breakage resistance of glass. In an embodiment, SrO (0 mol%) may be omitted. Alternatively, SrO may be included in an amount of about 0.5 mol% or more to effectively improve the solubility and breakage resistance of glass. If the content of SrO is too large, the ion exchange performance may be reduced, and therefore, the content of SrO may be about 20 mol% or less.

[0157] BaO is used to improve the fusibility and breakage resistance of the glass. In an embodiment, BaO (0 mol%) may be omitted. Alternatively, BaO may be included in an amount of about 0.5 mol% or more to effectively improve the fusibility and breakage resistance of the glass. In such an embodiment, BaO may be included in an amount of about 15 mol% or less to prevent excessive reduction in ion exchange performance.

[0158] ZnO is used to improve the solubility of the glass. In an embodiment, ZnO (0 mol%) may be omitted. Alternatively, ZnO may be included in an amount of about 0.25 mol% or more. In such an embodiment, the content of ZnO may be about 10 mol% or less to prevent a reduction in weatherability.

[0159] TiO 2 Improve the breakage resistance of chemically strengthened glass. In an embodiment, TiO 2 (0 mol%). Alternatively, TiO may be included in an amount of about 0.1 mol% or more. 2 , to effectively improve the damage resistance. In such an embodiment, TiO 2 The content of may be about 1 mol% or less to prevent devitrification during melting.

[0160] ZrO 2The breakage resistance of the glass can be improved, and the surface compressive stress of the glass can be increased due to ion exchange. In an embodiment, ZrO can be omitted. 2 (0 mol%). Alternatively, ZrO may be included in an amount of about 0.5 mol% or more. 2 , to effectively increase the surface compressive stress and damage resistance of the glass. In such an embodiment, ZrO may be included in an amount of about 8 mol% or less. 2 , to suppress devitrification during melting.

[0161] In addition to the above components, the glass composition may also include Y 2 O 3 ,La 2 O 3 , Nb 2 O 5 、 2 O 5 and Gd 2 O 3 The composition of the glass article 100 may be changed by a molding process, an ion exchange process, etc., which will be described later.

[0162] The glass composition can be formed into a flat glass shape by at least one of various methods known in the art. In one embodiment, for example, the glass composition can be formed by a float process, a fusion drawing process, a slot drawing process, etc.

[0163] The glass formed into a flat plate shape may be cut by a cutting step. The glass formed into a flat plate shape may have a size different from that of a final glass product. The cutting of the glass may be performed using a cutting knife, a cutting wheel, a laser, or the like.

[0164] The glass cutting step may be performed before the glass strengthening step S1. The glass of the mother substrate may be strengthened at the same time and then cut into the size of the final glass product. However, in this case, the cut surface (e.g., the side surface of the glass) may not be in a strengthened state. Therefore, in an embodiment, the strengthening step S1 may be performed after the cutting is completed.

[0165] Between the cutting step and the strengthening step S1 of the glass, a polishing step may be performed before strengthening. The polishing step may include a side polishing step and a surface polishing step before strengthening. After first performing the side polishing step, the surface polishing step may be performed before strengthening, but the order of these processes may be modified differently, such as reversing the order.

[0166] The side polishing step is a step of polishing the side surface of the cut glass. In the side polishing step, the side surface of the glass is polished to have a smooth surface. In addition, each side surface of the glass can have a uniform (flat or smooth) surface through the side polishing step. The side polishing step can be performed on a plurality of cut glass sheets at the same time. The side polishing step can be performed by a mechanical polishing method or a chemical mechanical polishing method using a polishing device.

[0167] A surface polishing step may be performed prior to strengthening so that each glass sheet has a uniform surface. A surface polishing step may be performed individually for each cut glass sheet prior to strengthening. However, in embodiments where the chemical mechanical polishing apparatus is sufficiently large compared to the glass, multiple glass sheets may be arranged horizontally and then surface polished simultaneously.

[0168] After the polishing step before strengthening, the strengthening step S1 is performed. The strengthening step S1 may include chemical strengthening and / or thermal strengthening. In an embodiment where the glass has a thin thickness of 2 mm or less (particularly about 0.75 mm or less), the chemical strengthening method can be used for precise stress distribution control. Hereinafter, for ease of description, an embodiment in which the chemical strengthening method is used for the strengthening step S1 of the glass will be described in detail.

[0169] Chemical strengthening can be performed by an ion exchange process. An ion exchange process is a process in which ions in the glass are exchanged for other ions. By performing an ion exchange process, ions at or near the surface of the glass can be replaced or exchanged with larger ions of the same valence or oxidation state. In one embodiment, for example, in a glass containing ions such as LI + 、Na + , K + and Rb + In the case of monovalent alkali metals, the monovalent cations on the surface can be replaced by Na + , K + , Rb + or Cs + ions instead. Fig.16 Describe the ion exchange process in detail. Fig.16 , when sodium ions (Na + ) is immersed in a glass containing potassium nitrate (KNO 3 ) in a molten salt bath and exposing the glass to potassium ions (K +), the sodium ions in the glass are discharged to the outside, and potassium ions can replace the sodium ions. The exchanged potassium ions generate compressive stress because potassium ions have a larger ionic radius than sodium ions. The greater the amount of potassium ion exchange, the greater the compressive stress becomes. Since the ion exchange is carried out through the surface of the glass, the amount of potassium ions on the surface of the glass is the largest. Although some of the exchanged potassium ions can diffuse into the glass to increase the depth of the compression area (i.e., the compression depth), the amount can generally decrease as it moves away from the surface. Therefore, the glass can have a stress distribution that has a maximum compressive stress on the surface and decreases as it moves toward the inside. However, embodiments are not limited thereto. The stress distribution can change according to the temperature of the ion exchange process, the processing time, the number of times, the presence or absence of heat treatment, etc.

[0170] like Fig.14 As shown in , the strengthened glass product 100 formed by chemical strengthening may include a first surface US, a second surface RS and a side surface. In the glass product 100 having a flat plate shape, the first surface US and the second surface RS are main surfaces having a large area, and the side surface is an outer surface connecting the first surface US and the second surface RS.

[0171] The first surface US and the second surface RS are opposite to each other in the thickness direction. In an embodiment, when the glass article 100 is used as a cover window of a display device (ie, the glass article 100 is used to transmit light), light may be mainly incident on one of the first surface US and the second surface RS and pass through the other.

[0172] The thickness t of the glass article 100 is defined as the distance between the first surface US and the second surface RS. In an embodiment, the thickness t of the glass article 100 may be in the range of about 0.1 mm to about 2 mm, but is not limited thereto. In such an embodiment, the thickness t of the glass article 100 may be about 0.8 mm or less. In such an embodiment, the thickness t of the glass article 100 may be about 0.75 mm or less. In such an embodiment, the thickness t of the glass article 100 may be about 0.7 mm or less. In such an embodiment, the thickness t of the glass article 100 may be about 0.6 mm or less. In such an embodiment, the thickness t of the glass article 100 may be about 0.65 mm or less. In such an embodiment, the thickness t of the glass article 100 may be about 0.5 mm or less. In another embodiment, the thickness t of the glass article 100 may be about 0.3 mm or less. In an embodiment, the thickness t of the glass article 100 may be in the range of about 0.45 mm to about 0.8 mm, or in the range of about 0.5 mm to about 0.75 mm. The glass article 100 may have a uniform thickness t, but is not limited thereto. Alternatively, the glass article 100 may have a different thickness t for each region.

[0173] The glass article 100 may be strengthened to have a predetermined stress distribution therein. Compared with the glass article 100 before strengthening, the strengthened glass article 100 more effectively prevents crack generation, crack propagation, fracture, etc. caused by external impact. The glass article 100 strengthened by the strengthening process may have different stresses for each region. In one embodiment, for example, compression regions CSR1 and CSR2 to which compressive stress is applied may be disposed near the surface of the glass article 100 (i.e., near the first surface US and the second surface RS), and a tensile region CTR to which tensile stress is applied may be disposed inside the glass article 100. The boundary between the compression regions CSR1 and CSR2 and the tensile region CTR may have a stress value of zero. The compressive stress in one of the compression regions CSR1 and CSR2 may have different stress values ​​depending on the position (i.e., the depth from the surface US and RS). Similarly, the tensile region CTR may have different stress values ​​depending on the depth from the surface US and RS.

[0174] Fig.15 is a graph showing the stress distribution of the strengthened glass article 100, which is expressed as a function f(x). The horizontal axis represents the thickness t direction of the glass article 100. Fig.15 In the formula (A), compressive stress has a positive value, while tensile stress has a negative value. Here, the magnitude of compressive stress / tensile stress means the magnitude of the absolute value, regardless of its type or sign.

[0175] Reference Fig.15 , the strengthened glass article 100 includes a first compression region CSR1 extending from the first surface US to a point at a first depth (first compression depth DOC1) and a second compression region CSR2 extending from the second surface RS to a point at a second depth (second compression depth DOC2). The tensile region CTR is disposed between the first compression region CSR1 and the second compression region CSR2, or between the first compression depth DOC1 and the second compression depth DOC2. Although Fig.15 Not shown in FIG. 1 , the compression region and the tension region may be disposed between opposing side surfaces of the glass article 100 in a similar manner.

[0176] The first compression region CSR1 and the second compression region CSR2 resist external impact to suppress the occurrence of cracks or breakage of the glass article 100. In such an embodiment, the greater the maximum compressive stresses CS1 and CS2 of the first compression region CSR1 and the second compression region CSR2, the greater the strength of the glass article 100 becomes. Since the external impact is generally transmitted through the surfaces US and RS of the glass article 100, the glass article 100 may have maximum compressive stresses CS1 and CS2 at its surfaces US and RS to improve durability. In such an embodiment, the glass article 100 may have a maximum tensile stress CT1 at its central portion. The maximum compressive stresses CS1 and CS2 of the first compression region CSR1 and the second compression region CSR2 may be about 700 megapascals (Mpa) or more. In one embodiment, for example, the maximum compressive stresses CS1 and CS2 of the first compression region CSR1 and the second compression region CSR2 may be in the range of about 800Mpa to about 1,050MPa. In such an embodiment, the maximum compressive stresses CS1 and CS2 of the first and second compression regions CSR1 and CSR2 may be in a range of about 850 MPa to about 1,000 MPa.

[0177] The first and second compression depths DOC1 and DOC2 inhibit cracks or grooves formed in the first and second surfaces US and RS from propagating to the tensile region CTR in the glass article 100. In an embodiment, the first and second compression depths DOC1 and DOC2 are effectively greater, thereby effectively preventing the propagation of cracks and the like.

[0178] The first compression depth DOC1 and the second compression depth DOC2 may be in a range of about 20 micrometers (μm) to about 150 μm. In an embodiment, the first compression depth DOC1 and the second compression depth DOC2 may be in a range of about 50 μm to about 100 μm. In one embodiment, for example, the first compression depth DOC1 and the second compression depth DOC2 may be in a range of about 70 μm to about 85 μm.

[0179] In an embodiment, although not limited thereto, the first compression depth DOC1 and the second compression depth DOC2 may satisfy the following relationship with respect to the thickness t of the glass article 100:

[0180] [Mathematical expression 1]

[0181] DOC1, DOC2 ≥ 0.1 × t

[0182] Reference Figure 4 and Fig.13After the strengthening step S1, the strengthened glass product 100 is heat-treated (step S2). The heat-treatment step S2 may include: placing the strengthened glass product 100 between adjacent side parts 30 of the glass product manufacturing equipment 10; and operating the heating part 20 of the glass product manufacturing equipment 10 to increase the temperature of the glass product manufacturing equipment 10, thereby heat-treating the strengthened glass product 100.

[0183] When the strengthened glass article 100 is placed between the adjacent side portions 30 of the glass article manufacturing apparatus 10, the glass article 100 may be fixed by the groove H of the glass article manufacturing apparatus 10. As described above, the groove H is provided between the adjacent side portions 30, and the spacing distance from the groove H to the adjacent side portion 30 located on one side and the spacing distance from the groove H to the adjacent side portion 30 located on the other side may be equal to each other.

[0184] In the step (or process) of operating the heat supply part 20 to heat up the glass product manufacturing apparatus 10 to heat-treat the strengthened glass product 100, heat may be supplied by the heat supply part 20 and the side part 30, wherein the side part 30 includes a heat conductive material and is supplied with heat by the heat supply part 20. In such an embodiment, since the groove H in which the strengthened glass product 100 is fixed is disposed between adjacent side parts 30, and the spacing distance from the groove H to the adjacent side part 30 located on one side and the spacing distance from the groove H to the adjacent side part 30 located on the other side are equal to each other, the one surface and the other surface may be uniformly heat-treated by receiving uniform heat from the heat supply part 20 and the side part 30 adjacent to one surface of the strengthened glass product 100 fixed in the groove H, and the side part 30 and the heat supply part 20 adjacent to the other surface of the glass product 100, respectively.

[0185] In such an embodiment, as described above, in the glass product manufacturing apparatus 10, the heat supplying portion 20 includes a halogen lamp capable of performing rapid heating, and the side portions 30 that receive heat supplied from the heat supplying portion 20 and are respectively located on one side and the other side of the glass product 100 include a material having high thermal conductivity or are made of a material having high thermal conductivity. Therefore, rapid heat treatment can be performed on the entire surface of the strengthened glass product 100.

[0186] In an embodiment, as described above, damage such as dents or cracks may occur on the surface of the strengthened glass article during transportation or due to impurities in the molten salt used for strengthening on the surface of the strengthened glass article. In an embodiment, in the case where the glass article is an ultra-thin glass article having a thickness in the range of about 30 μm to about 80 μm, the upper portion that is not fixed during chemical strengthening may be bent to contact the adjacent material, and impurities may remain on the surface thereof. Such damage or impurity residues may be reduced by the heat treatment step S2.

[0187] The step of operating the heating part 20 to heat the glass product manufacturing apparatus 10 to heat-treat the strengthened glass product 100 may be performed at an average temperature of about 530° C. for 3 hours. Generally, heat treatment of chemically strengthened glass may reduce mechanical properties of the surface, such as compressive stress or strength (strength obtained by a ball-on-ring (“BOR”) test or a bending strength test). However, in an embodiment of a method for manufacturing a glass product using the glass product manufacturing apparatus 10 according to the present invention, by rapidly heat-treating the strengthened glass product 100 in a short time, deterioration of mechanical properties (such as compressive stress and strength) that often occurs in heat treatment after strengthening can be greatly reduced.

[0188] This will refer to Fig.17 Describe in more detail.

[0189] exist Fig.17 , f(x) is a graph showing a function of stress distribution of the strengthened glass article 100 before heat treatment (Comparative Example 1), f'(x) is a graph showing a function of stress distribution of the glass after the strengthened glass is heat treated by a conventional furnace at a heating rate of about 10 K / min to about 30 K / min (Comparative Example 2), and f"(x) is a graph showing a function of stress distribution of the glass after the strengthened glass article 100 is heat treated by the manufacturing method according to the exemplary embodiment (Experimental Example 1).

[0190] like Fig.17 As shown in , it can be seen that in the case of Comparative Example 2, the compressive stress value on the surface of the glass is reduced to a greater extent than that of Comparative Example 1. On the other hand, in the case of Experimental Example 1, it can be seen that the reduced surface compressive stress value is not greater than that of Comparative Example 2. This is because by rapidly heat-treating the strengthened glass article 100 in a short time, the glass transition temperature is increased, and the deterioration of mechanical properties such as compressive stress or strength due to the heat treatment after strengthening is greatly reduced.

[0191] Hereinafter, an embodiment of a glass product manufactured by a method for manufacturing a glass product will be described. The same or similar elements in this embodiment of the glass product manufactured by the method described herein have been marked with the same reference numerals as those used in the above description of the embodiment of the glass product, and any repeated detailed description of these same or similar elements will be omitted or simplified hereinafter.

[0192] Fig.18 is a perspective view of a glass article according to various embodiments. Fig.19 is a cross-sectional view illustrating an exemplary embodiment in which a glass article is applied to a cover window of a display device.

[0193] Reference Figure 18 to Figure 19 In an embodiment, the glass article 101 may have a flat sheet shape or a flat plate shape. In an alternative embodiment, the glass articles 102, 103, or 104 may have a three-dimensional shape including a curved portion. In an embodiment, for example, the edge of the flat portion may be curved (glass article 102), or the flat portion may be entirely curved (glass article 103) or folded (glass article 104).

[0194] In an embodiment, if Fig.18 As shown in , the plane shape of the glass products 101 to 104 may be a rectangular shape, but is not limited thereto. Alternatively, the plane shape of the glass product may have one of a variety of shapes such as a rectangular shape with rounded corners, a square shape, a circular shape, and an elliptical shape. Hereinafter, for ease of description, an embodiment in which the glass product 100 is a flat plate having a rectangular plane shape will be described in detail, but the present disclosure is not limited thereto.

[0195] In an embodiment, the glass article 101 may be a glass article heat-treated at a heating rate of about 40 Kelvin per minute (K / min) or more by the manufacturing method described above. The glass transition temperature Tg1 of such an embodiment of the glass article 101 may be higher than the glass transition temperature of a glass article heat-treated at a heating rate of about 10 K / min.

[0196] In an embodiment, if Fig.19 As shown in , the glass article may be a cover window of the display device 500. In such an embodiment, the display device 500 may include a display panel 200, a cover window 101 disposed on the display panel 200, and an optically transparent bonding layer 300 disposed between the display panel 200 and the cover window 101 to bond the display panel 200 and the cover window 101 to each other.

[0197] This embodiment of the display panel 200 may include not only self-luminous display panels such as an organic light emitting display ("OLED") panel, an inorganic electroluminescent ("EL") display panel, a quantum dot ("QED") display panel, a micron light emitting diode ("LED") display panel, a nano LED display panel, a plasma display panel ("PDP"), a field emission display ("FED") panel, and a cathode ray tube ("CRT") display panel, but may also include light receiving display panels such as a liquid crystal display ("LCD") panel and an electrophoretic display ("EPD") panel.

[0198] The display panel 200 includes a plurality of pixels PX, and an image can be displayed by using light emitted from each pixel PX. The display device 500 may further include a touch member (not shown). In an embodiment, the touch member may be embedded in the display panel 200. In one embodiment, for example, the touch member is directly formed on the display member of the display panel 200, so that the display panel 200 itself can perform a touch function. In an optional embodiment, the touch member may be manufactured separately from the display panel 200, and then attached to the top surface of the display panel 200 through the optically transparent bonding layer 300.

[0199] The cover window 101 is disposed on the display panel 200. The cover window 101 is used to protect the display panel 200. The tempered glass article 100 may be applied to the main body of the cover window 101. Since the size of the cover window 101 is larger than the size of the display panel 200, the side surface SS thereof may protrude outward from the side surface of the display panel 200, but is not limited thereto. The cover window 101 may further include a printed layer disposed at an edge portion of the glass article 100 on at least one surface of the glass article 100. The printed layer of the cover window 101 may prevent the frame area of ​​the display device 500 from being visible from the outside, and may selectively perform a decorative function.

[0200] The optically transparent bonding layer 300 is disposed between the display panel 200 and the cover window 101. The optically transparent bonding layer 300 is used to fix the cover window 101 to the display panel 200. The optically transparent bonding layer 300 may include an optically clear adhesive ("OCA"), an optically clear resin ("OCR"), and the like.

[0201] Fig. 20 is a plan view of a glass article according to an alternative exemplary embodiment.

[0202] In addition to the glass article 102 including multiple portions having different glass transition temperatures therein, Fig. 20 The glass article 102 shown in Fig.18 The implementation methods are basically the same.

[0203] In an embodiment, the glass article 102 may include multiple portions having different glass transition temperatures therein.

[0204] In one embodiment, for example, the glass article 102 may include a first pattern extending along a first direction DR1, a second pattern adjacent to the first pattern in a third direction DR3 and extending along the first direction DR1, and a third pattern adjacent to the second pattern in the third direction DR3 and extending along the first direction DR1. The glass transition temperature Tg2a of the first pattern, the glass transition temperature Tg2c of the second pattern, and the glass transition temperature Tg2b of the third pattern may be different from each other. The first pattern and the third pattern may be glass articles, respectively, by being connected to the glass article. Figure 6 The second pattern may be a portion formed by overlapping (corresponding) side patterns spaced apart from each other along the third direction DR3 of the glass product. Figure 6 A portion is formed by overlapping (corresponding to) a space between adjacent side patterns (a space in which the second side portion 31b_1 is not provided).

[0205] Fig.21 is a plan view of a glass article according to another alternative exemplary embodiment.

[0206] In addition to the glass article 103 including multiple portions having different glass transition temperatures therein, Fig.21 The glass article 103 shown in Fig.18 The implementation methods are basically the same.

[0207] In such an embodiment, the glass article 103 can include multiple portions having different glass transition temperatures therein.

[0208] In one embodiment, for example, the glass article 103 may include a fourth pattern extending along the third direction DR3, a fifth pattern adjacent to the fourth pattern in the first direction DR1 and extending along the third direction DR3, and a sixth pattern adjacent to the fifth pattern in the first direction DR1 and extending along the third direction DR3. The glass transition temperature Tg3a of the fourth pattern, the glass transition temperature Tg3c of the fifth pattern, and the glass transition temperature Tg3b of the sixth pattern may be different from each other. The fourth pattern and the sixth pattern may be glass articles that are formed by respectively contacting the glass article with the glass article. Fig. 9 The fifth pattern may be a portion formed by overlapping (corresponding) side patterns spaced apart from each other along the first direction DR1. Fig. 9 Another portion is formed by overlapping (corresponding to) a space between adjacent side patterns (a space in which the second side portion 31b_3 is not provided).

[0209] The present invention should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art.

[0210] While the invention has been particularly shown and described with reference to embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the following claims.

Claims

1. An apparatus for manufacturing glass products, the apparatus comprising: a plurality of side portions spaced apart from one another; as well as a plurality of heating sections disposed directly on each of said side sections, wherein the plurality of side portions include a side portion disposed between the outermost side portions for supporting the heating portion, Adjacent side portions adjacent to each other among the plurality of side portions are arranged to face each other, Each of the plurality of side portions includes a thermally conductive material, and It is permitted to provide glass between the adjacent side portions.

2. The device according to claim 1, wherein: The heating rate of the apparatus is 40 K / min or more.

3. The device according to claim 2, wherein: The heating rate is variable.

4. The device according to claim 2, wherein: Each of the heating parts has a 2 cm 2 or larger in plan size and includes a halogen lamp.

5. The apparatus of claim 1, wherein: The heat supply portions on one of the side portions are arranged in a matrix form in a first direction and in a second direction intersecting the first direction.

6. The apparatus according to claim 5, wherein: The thermally conductive material has a thermal conductivity of 200 W / mk or greater, and The thermally conductive material includes aluminum or graphene.

7. The device according to claim 6, wherein: Each of the side portions includes a first side portion and a second side portion disposed between the first side portion and the heat supply portion on the second side portion.

8. The device according to claim 7, wherein: In a plan view, the first side portion and the second side portion have the same size as each other.

9. The device according to claim 7, wherein: The second side portion includes the thermally conductive material.

10. The apparatus of claim 9, wherein: the second side portion includes a plurality of side patterns, each of the plurality of side patterns having a linear shape extending in the first direction, Adjacent side patterns adjacent to each other among the plurality of side patterns are spaced apart from each other in the second direction, and The side pattern is disposed to overlap the heat supply portion.

11. The device according to claim 10, wherein: The heat supply portion provided on one of the side patterns and the heat supply portion provided on the other of the side patterns operate independently of each other.

12. The device according to claim 10, wherein: The second side portion further includes a connection portion connecting the adjacent side patterns spaced apart from each other in the second direction to each other.

13. The apparatus of claim 5, wherein: The side portions are regularly arranged with the same spacing distance between adjacent side portions, and The spacing distance between the adjacent side portions is in the range of 1 cm to 2 cm.

14. The apparatus according to claim 5, further comprising: A supporting portion supports the side portion.

15. The apparatus of claim 14, wherein: a groove is defined in a surface of the support portion between the adjacent side portions, and The groove of the supporting portion fixes the glass.

16. The device according to claim 15, wherein: A spacing distance between the groove and one of the adjacent side portions is equal to a spacing distance between the groove and another of the adjacent side portions.

17. The apparatus according to claim 16, further comprising: The fixing portion fixes the glass disposed between the adjacent side portions.

18. A method for manufacturing a glass product, the method comprising: To shape the glass; Strengthening formed glass; as well as Heat treatment of tempered glass using glass manufacturing equipment, Wherein, the glass product manufacturing equipment comprises: a plurality of side portions spaced apart from one another; and a plurality of heating portions disposed directly on each of the side portions, and wherein the plurality of side portions include a side portion disposed between the outermost side portions for supporting the heating portion, Adjacent side portions adjacent to each other among the plurality of side portions of the glass product manufacturing apparatus are arranged to face each other, and Each of the plurality of side portions includes a thermally conductive material.

19. The method according to claim 18, wherein: Heat treatment of the strengthened glass includes: placing the strengthened glass between the adjacent side portions of the glass article manufacturing apparatus, and The glass product manufacturing equipment is heated up to heat treat the strengthened glass.

20. The method according to claim 19, wherein: Increasing the temperature of the glass manufacturing equipment includes changing a heating rate of the glass manufacturing equipment.

21. A glass product manufactured according to the method of any one of claims 18 to 20, comprising: a first surface; a second surface, opposite to the first surface; a first compression region extending from the first surface to a point at a first compression depth; a second compressed region extending from the second surface to a point at a second compressed depth; as well as a stretching region disposed between the first compression region and the second compression region, The glass article has a glass transition temperature higher than the glass transition temperature of a glass article heat treated at a heating rate in the range of 10 K / min to 30 K / min.

22. The glass article according to claim 21, further comprising: A first portion extending along a first direction; as well as a second portion extending in the first direction and separated from the first portion in a second direction intersecting the first direction, wherein a glass transition temperature of the first portion and a glass transition temperature of the second portion are different from each other.

23. A display device, comprising: A display panel including a plurality of pixels; A cover window manufactured by the method according to any one of claims 18 to 20, arranged on the display panel; as well as an optically transparent bonding layer, disposed between the display panel and the cover window, Wherein, the cover window comprises: a first surface; a second surface, opposite to the first surface; a first compression region extending from the first surface to a point at a first compression depth; a second compressed region extending from the second surface to a point at a second compressed depth; and a stretching region disposed between the first compression region and the second compression region, The glass transition temperature of the cover window is higher than the glass transition temperature of a glass article heat-treated at a heating rate in the range of 10 K / min to 30 K / min.

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