Support device and tempering method for flexible ultra-thin glass

Abstract

The present invention relates to a support device and a method for tempering flexible ultra-thin glass. The support device comprises a frame, a bracket and a concave-convex part, the bracket comprises an auxiliary unit and a support member, the auxiliary unit is located in the frame and fixed on the frame, the support member is located in the frame and fixed on the frame, the auxiliary unit and the support member together form a receiving space that can receive the glass to be tempered; the side of the support member close to the receiving space and the side of the auxiliary unit close to the receiving space are both provided with concave-convex parts to reduce the contact area between the support device and the glass to be tempered. The flexible ultra-thin tempered glass obtained by tempering the flexible ultra-thin glass with the support device is not prone to marks and surface deformation, thereby improving the tempering yield of the flexible ultra-thin glass.

Description

Technical Field

[0001] The invention relates to the technical field of flexible ultra-thin glass processing, and in particular to a supporting device and a method for tempering flexible ultra-thin glass. Background Art

[0002] Flexible glass refers to ultra-thin glass with a thickness not exceeding 0.1mm. Flexible glass can be bent, and at the same time has the hardness, transparency, heat resistance, electrical insulation, airtightness, and stable mechanical and chemical properties of glass in oxidation and light environments. It can be used in folding screen cover plates, flexible display screen substrates, OLED lighting, ITO conductive glass substrates, flexible solar cells and other fields. Flexible glass is generally directly drawn and formed by overflow down-drawing method, slit down-drawing method, float method or secondary drawing method, which can realize continuous production. The drawn glass can be rolled up like a plastic film, which can realize "roll-to-roll" production.

[0003] With the advancement of science and technology, major glass production and processing plants at home and abroad are currently working hard to develop flexible ultra-thin glass (Ultra-thin Flexible Glass, UTG glass). Flexible ultra-thin glass is a glass with a thickness of no more than 200μm that is further reduced on the basis of flexible glass. Flexible ultra-thin glass also has the advantages of glass hardness, transparency, heat resistance, electrical insulation, airtightness, and stable mechanical and chemical properties under oxidation and light environments, but it is more fragile. Therefore, when preparing flexible ultra-thin glass, it is often necessary to temper the drawn flexible ultra-thin glass. However, the traditional tempering process of flexible ultra-thin glass is prone to glass breakage, imprints, surface deformation and other defects, and the production yield is low. Summary of the invention

[0004] Based on this, it is necessary to provide a supporting device that can improve the tempering yield of flexible ultra-thin glass.

[0005] In addition, it is also necessary to provide a tempering treatment method that can improve the tempering yield of flexible ultra-thin glass.

[0006] A support device, comprising a frame, a bracket and a concave-convex part, the bracket comprising an auxiliary unit and a support part, the auxiliary unit is located in the frame and fixed on the frame, the support part is located in the frame and fixed on the frame, the auxiliary unit and the support part together form a storage space that can accommodate glass to be tempered; the concave-convex part is provided on one side of the support part close to the storage space and on one side of the auxiliary unit close to the storage space to reduce the contact area between the support device and the glass to be tempered.

[0007] The support device comprises a frame, a bracket and a concave-convex part, the bracket is fixed on the frame, and the concave-convex part is fixed on the bracket. The support device reduces the contact area between the glass to be tempered and the support device by arranging the concave-convex part on the bracket, so that the flexible ultra-thin tempered glass obtained by tempering the flexible ultra-thin glass with the support device is not prone to marks and surface deformation, thereby improving the tempering yield of the flexible ultra-thin glass.

[0008] In one embodiment, there are multiple support members, which are arranged at intervals, and the multiple support members and the auxiliary unit together form the accommodation space;

[0009] And / or, the concave-convex member includes a concave-convex portion for contacting the glass to be tempered, and the concave-convex portion is wavy or sawtooth-shaped.

[0010] In one embodiment, the spacing between the troughs of the concave-convex portion is 4.5 mm to 5.5 mm;

[0011] And / or, the height of the concavo-convex portion is 3.5 mm to 4.5 mm; the angle between the line connecting the trough of the concavo-convex portion and the crest of the concavo-convex portion and the plane where the trough of the concavo-convex portion is located is 35° to 55°.

[0012] In one embodiment, the concave-convex part is a metal part, and the metal part is wavy and fixed on the bracket.

[0013] In one embodiment, the frame has a bottom top surface and a bottom surface opposite to the top surface, the support member is in a strip shape, and the support member is close to the bottom surface; the auxiliary unit includes two auxiliary members arranged at intervals, and the auxiliary member includes at least two cross-connected baffles, and the surfaces of all the baffles close to the glass to be tempered are coplanar, the two auxiliary members and the support member together form the accommodating space, and the concave and convex parts are provided on one side of the baffle close to the accommodating space and on one side of the support member close to the top surface.

[0014] In one embodiment, the bracket also includes a fixing member, and the auxiliary unit is fixed to the frame through the fixing member, the fixing member is in a strip shape, and the length direction of the fixing member is the same as the length direction of the supporting member; the fixing member includes a top fixing member and a bottom fixing member spaced from the top fixing member, the top fixing member is close to the top surface, and the bottom fixing member is close to the bottom surface, and the blocking member is in a strip shape, one end of the blocking member is fixedly connected to the bottom fixing member, and the other end is fixedly connected to the top fixing member.

[0015] In one of the embodiments, the interval between two auxiliary parts in the same auxiliary unit is 8 mm to 12 mm.

[0016] In one embodiment, there are a plurality of auxiliary units, and the auxiliary units and the supporting members are crisscrossed to form a plurality of the accommodating spaces.

[0017] A method for tempering flexible ultra-thin glass, comprising the following steps:

[0018] The flexible ultra-thin glass to be tempered is placed in a supporting device for tempering treatment, wherein the supporting device comprises a frame, a bracket and a concave-convex part, the bracket comprises an auxiliary unit and a supporting part, the auxiliary unit is located in the frame and fixed on the frame, the supporting part is located in the frame and fixed on the frame, the auxiliary unit and the supporting part together form a storage space that can accommodate the glass to be tempered; the concave-convex part is provided on one side of the supporting part close to the storage space and on one side of the auxiliary unit close to the storage space to reduce the contact area between the supporting device and the glass to be tempered.

[0019] In one embodiment, before placing the flexible ultra-thin glass to be tempered in the supporting device, the flexible ultra-thin glass to be tempered further comprises a step of acid-treating the flexible ultra-thin glass to be tempered, wherein the acid-treating step comprises:

[0020] The flexible ultra-thin glass to be tempered is placed in an acid solution for etching for 10s to 60s, wherein the acid solution comprises water, a sulfuric acid solution with a mass percentage of 95% to 98% and a hydrofluoric acid solution with a mass percentage of not less than 40%, and the volume ratio of the sulfuric acid solution, the hydrofluoric acid solution and the water is (3 to 7): (8 to 12): (81 to 89).

[0021] In one embodiment, the tempering step includes: preheating, tempering and annealing the flexible ultra-thin glass to be tempered in sequence;

[0022] The preheating includes first stage preheating, second stage preheating and third stage preheating in sequence. The parameters of the first stage preheating are: heating from room temperature to 135°C to 165°C; the parameters of the second stage preheating are: heating from 135°C to 165°C to 225°C to 255°C; the parameters of the third stage preheating are: heating from 225°C to 255°C to 365°C to 395°C and then keeping warm for 25min to 35min.

[0023] The tempering temperature is 365°C to 405°C, the tempering time is 10min to 30min, and the salt dripping time during the tempering process is 5min to 12min;

[0024] The annealing includes sequentially performing a first stage slow cooling, a second stage slow cooling, a third stage slow cooling and a fourth stage slow cooling, wherein the parameters of the first stage slow cooling are: cooling from the tempering temperature to 315°C to 335°C within 45min to 75min; the parameters of the second stage slow cooling are: cooling from 315°C to 335°C to 185°C to 215°C within 90min to 135min; the parameters of the third stage slow cooling are: cooling from 185°C to 215°C to 85°C to 115°C within 85min to 115min; the parameters of the fourth stage slow cooling are: cooling from 85°C to 115°C to 25°C to 50°C within 105min to 135min.

[0025] A flexible ultra-thin tempered glass is produced by the above-mentioned flexible ultra-thin glass tempering treatment method. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional diagram of a supporting device according to an embodiment;

[0027] Figure 2 When no tempered glass is placed Figure 1 A side view of the support device shown;

[0028] Figure 3 for Figure 1 A top view of the support device shown;

[0029] Figure 4 for Figure 2 An enlarged view of part A of the supporting device shown;

[0030] Figure 5 for Figure 2 An enlarged view of portion B of the support device is shown.

[0031] Reference numerals:

[0032] 10. Support device; 110. Frame; 130. Concave and convex part; 121. Auxiliary unit; 122. Support part; 111. Bottom surface; 112. Top surface; 123. Auxiliary part; 124. Stopper; 125. Fixing part; 126. Top fixing part; 127. Bottom fixing part; 20. Glass to be tempered. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements between them; in addition, unless otherwise specified, the method of fixed connection is not particularly limited. For example, it can be a detachable fixed connection such as screwing or clamping, or it can be a non-detachable fixed connection such as bonding, welding, riveting, etc. When an element is described as "connected" to another element, it can be directly connected to the other element, or there can be one or more centered elements between them. When the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom" and the like are used to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Normal temperature in this article refers to 26°C.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] See also Figure 1 to Figure 3 In one embodiment of the present application, a support device 10 is provided. The support device 10 includes a frame 110, a bracket and a concave-convex part 130. The bracket includes an auxiliary unit 121 and a support member 122. The auxiliary unit 121 is located in the frame 110 and fixed on the frame 110. The support member 122 is located in the frame 110 and fixed on the frame 110. The auxiliary unit 121 and the support member 122 together form a receiving space that can receive a glass to be tempered 20. The side of the support member 122 close to the receiving space and the side of the auxiliary unit 121 close to the receiving space are both provided with a concave-convex part 130 to reduce the contact area between the support device 10 and the glass to be tempered 20. The support device 10 reduces the direct contact area between the glass to be tempered 20 and the support device 10 by providing the concave-convex part 130 on the bracket, so that the flexible ultra-thin tempered glass obtained by using the support device 10 for tempering the flexible ultra-thin glass is not prone to marks and surface defects, thereby improving the tempering yield of the flexible ultra-thin glass.

[0037] The frame 110 serves as a base of the support device 10. Specifically, the frame 110 has a bottom surface 111 and a top surface 112 opposite to the bottom surface 111. In the illustrated embodiment, the frame 110 is roughly in the shape of a hollow rectangular parallelepiped. It is understood that in other embodiments, the shape of the frame 110 is not limited to a rectangular parallelepiped, but may also be other shapes, which can be adjusted according to specific needs. In one of the embodiments, the frame 110 is a stainless steel frame 110. It is understood that the material of the frame 110 is not limited to stainless steel, but may also be other materials suitable for tempering technology.

[0038] The bracket is used to support the glass 20 to be tempered. In some embodiments, the bracket includes a plurality of spaced support members 122 and at least one auxiliary unit 121. In one embodiment, each support member 122 is strip-shaped and close to the bottom surface 111. It is understood that in other embodiments, the shape of the support member 122 is not limited to strip-shaped, but can also be other shapes. Of course, the shapes of the plurality of support members 122 can also be completely different or partially the same. For example, a portion of the support members 122 is in the shape of a quadrangular prism, and another portion of the support members 122 is in the shape of a cylinder. For another example, the shapes of the support members 122 are different.

[0039] In some embodiments, the spacing between adjacent support members 122 is equal. That is, multiple support members 122 are arranged at equal intervals. By arranging multiple support members 122 at equal intervals, the force on the tempered glass 20 can be relatively uniform, so that it is not easy to deform during the tempering process. In one embodiment, the spacing between adjacent support members 122 is 15mm to 25mm. In an optional specific example, the spacing between adjacent support members 122 is 18mm, 20mm or 24mm.

[0040] In one embodiment, the glass 20 to be tempered is a flexible ultra-thin glass in the form of a rectangular sheet, and the length of the glass 20 to be tempered is 130 mm to 150 mm, and the width is 60 mm to 80 mm. At this time, there are three support members 122, and the spacing between adjacent support members 122 is 18 mm to 22 mm. The three support members 122 can support the flexible ultra-thin glass and are not easy to deform the flexible ultra-thin glass. If the number of support members 122 is less than three, it is easy for the flexible ultra-thin glass to deform during the tempering process. It can be understood that in other embodiments, the support members 122 are not limited to three, but can also be any integer greater than three; the spacing between adjacent support members 122 is also not limited to the above, and can be adjusted according to specific circumstances.

[0041] In the illustrated embodiment, the length direction of the support member 122 is the same as the width direction of the frame 110. It is understandable that in other embodiments, the length direction of the support member 122 may also be the same as the length direction of the frame 110, or may be at a certain angle to the length direction of the frame 110.

[0042] The auxiliary unit 121 is used to cooperate with the support member 122 to form a space for accommodating the glass 20 to be tempered, and to maintain the glass 20 to be tempered upright in the direction of gravity. For flexible ultra-thin glass, due to its ultra-thin and flexible characteristics, the auxiliary unit 121 is set to try to maintain it upright in the direction of gravity. Specifically, the auxiliary unit 121 is located in the frame 110 and fixed on the frame 110. The auxiliary unit 121 includes two auxiliary members 123 arranged at intervals. The auxiliary member 123 includes at least two cross-connected stoppers 124. The surfaces of all the stoppers 124 close to the accommodation space are coplanar. The two auxiliary members 123 and the support member 122 jointly form an accommodation space for accommodating a piece of glass 20 to be tempered. The side of the two stoppers 124 close to the accommodation is provided with a concave-convex member 130, and the side of the support member 122 close to the top surface 112 is also provided with a concave-convex member 130. In the illustrated embodiment, there are two stoppers, and the stopper 124 is a strip with a rectangular cross section. It is understood that in other embodiments, the shape of the blocking member 124 is not limited to the above, and may be other shapes, such as cylindrical. When the blocking member 124 is cylindrical, the two cross-connected blocking members 124 are coplanar on one side close to the accommodation space.

[0043] In some embodiments, there are multiple auxiliary units 121, and the multiple auxiliary units 121 and the multiple supporting members 122 are crisscrossed to form multiple accommodation spaces. Figure 3 , the auxiliary member 123 is crisscrossed with the support member 122. In the illustrated embodiment, the length direction of the auxiliary member 123 is perpendicular to the length direction of the support member 122. It is understood that in other embodiments, the length direction of the auxiliary member 123 may not be perpendicular to the length direction of the support member 122, for example, other angles greater than 0° and less than 180°.

[0044] In one embodiment, the two stoppers 124 and the support strips are provided with concavo-convex parts 130 at positions where the two stoppers 124 and the support strips may contact the glass 20 to be tempered. By providing the concavo-convex parts 130 at positions where the stoppers 124 and the support strips 122 may contact the glass 20 to be tempered, the area of ​​direct contact between the glass 20 to be tempered and the support device 10 can be reduced, so that the glass after the tempering process is not prone to marks and surface deformation, the yield is improved, and the waste of the concavo-convex parts 130 is avoided. In the illustrated embodiment, each support 122 is provided with a concavo-convex part 130 on one side close to the top surface 112, the length direction of the concavo-convex part 130 is in the same direction as the length direction of the support 122, and the length of the concavo-convex part 130 is substantially the same as the length of the support 122. At this time, the concavo-convex part 130 is also provided on the support 122 that will not contact the glass 20 to be tempered. It is understandable that, in other embodiments, there may be multiple concave-convex pieces 130 on each support member 122, and the multiple concave-convex pieces 130 are arranged at intervals in the length direction of the support member 122. In this case, the concave-convex piece 130 is only arranged at a position that may contact the glass 20 to be tempered, that is, in the space formed by the auxiliary piece 123 and the support member 122 for accommodating the glass 20 to be tempered. Such an arrangement can reduce the material used for the concave-convex piece 130.

[0045] In the above embodiment, a plurality of support members 122 corresponds to at least one auxiliary unit 121. That is, when the number of support members 122 remains unchanged, the number of auxiliary units 121 can be increased, thereby increasing the number of accommodation spaces. It is understandable that in other embodiments, one support member 122 can correspond to one auxiliary unit 121 to form an accommodation space for accommodating a piece of tempered glass 20 (in this case, the tempered glass 20 is placed in the same length direction as the support member 122). In this case, the accommodation space is increased by adding support members 122 and auxiliary units 121 at the same time.

[0046] In some embodiments, the bracket further includes a fixing member 125, and the auxiliary unit 121 is fixed to the frame 110 through the fixing member 125. In one embodiment, the fixing member 125 is fixed to the frame 110. The fixing member 125 is in a strip shape, and the length direction of the fixing member 125 is the same as the length direction of the support member 122. The fixing member 125 includes a top fixing member 126 and a bottom fixing member 127 spaced from the top fixing member 126, the top fixing member 126 is close to the top surface 112, and the bottom fixing member 127 is close to the bottom surface 111. The two stoppers 124 of the auxiliary member 123 are fixedly connected to the bottom fixing member 127 at one end and fixedly connected to the top fixing member 126 at the other end. It can be understood that, in other embodiments, the shape of the fixing member 125 is not limited to a strip, but can also be other shapes; the length direction of the fixing member 125 can also be different from the length direction of the supporting member 122, as long as it can be used to fix the auxiliary member 123 to the frame 110; of course, the top fixing member 126 and the bottom fixing member 127 can also be not spaced apart, and can be adjusted according to actual needs.

[0047] In some embodiments, the bracket includes a plurality of auxiliary units 121 fixed on the frame 110. In one embodiment, the plurality of auxiliary units 121 are independently arranged. Specifically, the auxiliary parts 123 of the plurality of auxiliary units 121 are independent of each other, and there is no situation of sharing auxiliary parts 123. In another embodiment, the plurality of auxiliary parts 123 are fixed on the frame 110 in parallel and at intervals, and two adjacent auxiliary parts 123 constitute an auxiliary unit 121. For example, three auxiliary parts 123 are arranged at intervals to form two auxiliary units 121. In this case, the auxiliary part 123 located in the middle becomes the shared auxiliary part 123 of the two auxiliary units 121.

[0048] See also Figure 4 In one embodiment, the interval between two auxiliary members 123 in the same auxiliary unit 121 ( Figure 4 a) is 8mm to 12mm. According to such a configuration, it is convenient to put the tempered glass 20 into the space formed by the support member 122 and the auxiliary member 123, and it is also difficult for the surface of the tempered glass 20 to be marked or deformed. In an optional specific example, the interval between the two auxiliary members 123 in the same auxiliary unit 121 is 8mm, 9mm, 10mm or 11mm. Furthermore, the interval between the two auxiliary members 123 in the same auxiliary unit 121 is 9.5mm to 10.5mm.

[0049] Please also read Figure 5, the concavo-convex part 130 is located on the bracket, and is used to reduce the contact area between the glass to be tempered 20 and the supporting device 10. Further, when the glass to be tempered 20 is placed on the concavo-convex part 130, the part of the glass to be tempered 20 that directly contacts the concavo-convex part 130 is in a linear and / or dot shape rather than one of the surfaces of the glass to be tempered 20, thereby reducing the contact area between the glass to be tempered 20 and the supporting device 10.

[0050] In some embodiments, the concave-convex member 130 includes a concave-convex portion for contacting the to-be-tempered glass 20, and the concave-convex portion is wavy or sawtooth-shaped. When in use, the to-be-tempered glass 20 is placed between two wave crests of the concave-convex portion or on the wave crest.

[0051] In one embodiment, the spacing between the troughs of the concave-convex part is 4.5 mm to 5.5 mm. In an optional specific example, the spacing between the troughs of the concave-convex part is 4.5 mm, 4.8 mm, 5 mm, 5.2 mm or 5.5 mm. Further, the spacing between the troughs of the concave-convex part is 4.8 mm to 5.2 mm. It should be noted that when the concave-convex part is wavy, the spacing between the troughs of the concave-convex part refers to the distance between two adjacent troughs ( Figure 5 It can be understood that when the concave-convex portion is sawtooth-shaped, the spacing between the troughs of the concave-convex portion refers to the distance between two adjacent tooth tips.

[0052] In one embodiment, the height of the concavo-convex portion is 3.5 mm to 4.5 mm. In an optional specific example, the height of the concavo-convex portion is 3.5 mm, 3.8 mm, 4 mm, 4.2 mm or 4.5 mm. Further, the height of the concavo-convex portion is 3.8 mm to 4.2 mm. It should be noted that when the concavo-convex portion is wavy, the height of the concavo-convex portion refers to the distance from the crest to the plane where the trough adjacent to the crest is located ( Figure 5 It can be understood that when the concavo-convex portion is sawtooth-shaped, the height of the concavo-convex portion is the height of the sawtooth (the distance from the tooth tip to the tooth root close to the support member 122).

[0053] In one embodiment, the angle ( Figure 5 In one optional specific example, the angle between the line connecting the trough of the concavo-convex part and the wave crest of the concavo-convex part and the plane where the trough of the concavo-convex part is located is 35°, 40°, 45°, 50° or 55°. Furthermore, the angle between the line connecting the trough of the concavo-convex part and the wave crest of the concavo-convex part and the plane where the trough of the concavo-convex part is located is 40° to 50°.

[0054] In one embodiment, the concavoconvex part is wavy, the spacing between the troughs of the concavoconvex part is 4.5mm-5.5mm; the height of the concavoconvex part is 3.5mm-4.5mm; the angle between the line connecting the trough of the concavoconvex part and the wave crest of the concavoconvex part and the plane where the trough of the concavoconvex part is located is 35°-55°. Further, the concavoconvex part is wavy, the spacing between the troughs of the concavoconvex part is 4.8mm-5.2mm; the height of the concavoconvex part is 3.8mm-4.2mm; the angle between the line connecting the trough of the concavoconvex part and the wave crest of the concavoconvex part and the plane where the trough of the concavoconvex part is located is 40°-50°.

[0055] In one embodiment, the concave-convex member 130 is a metal rope, which is wavy and fixed on the bracket. In the illustrated embodiment, the crest of the wavy metal rope faces the plane where the top surface 112 is located.

[0056] In addition, an embodiment of the present application further provides a method for tempering flexible ultra-thin glass, the method comprising the steps of placing the flexible ultra-thin glass to be tempered on any of the above-mentioned supporting devices and then performing tempering treatment.

[0057] Specifically, the tempering treatment includes preheating, tempering and annealing the flexible ultra-thin glass to be tempered in sequence. More specifically, the flexible ultra-thin glass to be tempered is placed in the space formed by the auxiliary member and the support member of the above-mentioned support device, so that one side of the flexible ultra-thin glass to be tempered is located on the concave-convex member on the support member, and one side of the flexible ultra-thin glass to be tempered is against the concave-convex member of one of the auxiliary members, and then the flexible ultra-thin glass to be tempered is placed in the tempering furnace. For example, Figure 1 Place the tempered glass as shown.

[0058] In this embodiment, preheating includes first stage preheating, second stage preheating and third stage preheating in sequence. Specifically, the parameters of the first stage preheating are: heating from room temperature to 135℃~165℃; the parameters of the second stage preheating are: heating from 135℃~165℃ to 225℃~255℃; the parameters of the third stage preheating are: heating from 225℃~255℃ to 365℃~395℃, and keeping warm for 25min~35min. Further, the parameters of the first stage preheating are: heating from room temperature to 135℃~165℃ within 25min~35min; the parameters of the second stage preheating are: heating to 225℃~255℃ within 55min~65min; the parameters of the third stage preheating are: heating to 365℃~395℃ within 105min~115min, and keeping warm for 25min~35min. Furthermore, the parameters of the first stage preheating are: heating from room temperature to 140℃~160℃ within 25min~35min; the parameters of the second stage preheating are: heating to 230℃~250℃ within 55min~65min; the parameters of the third stage preheating are: heating to 370℃~390℃ within 105min~115min, and keeping warm for 25min~35min. In an optional specific example, the parameters of the first stage preheating are: heating from room temperature to 150℃ within 30min; the parameters of the second stage preheating are: heating to 240℃ within 60min; the parameters of the third stage preheating are: heating to 380℃ within 110min, and keeping warm for 30min.

[0059] In this embodiment, the tempering temperature is 365°C to 395°C; the tempering time is 10min to 30min; and the salt dripping time during the tempering process is 8min to 12min. Further, the tempering temperature is 370°C to 390°C. In an optional specific example, the tempering temperature is 380°C; the tempering time is 20min; and the salt dripping time during the tempering process is 10min.

[0060] In this embodiment, annealing includes sequentially performing the first stage slow cooling, the second stage slow cooling and the third stage slow cooling. Specifically, the parameters of the first stage slow cooling are: cooling from the tempering temperature to 315°C to 335°C within 45min to 75min; the parameters of the second stage slow cooling are: cooling to 185°C to 215°C within 90min to 135min; the parameters of the third stage slow cooling are: cooling from 185°C to 215°C to 85°C to 115°C within 80min to 115min; the parameters of the fourth stage slow cooling are: cooling from 85°C to 115°C to 25°C to 50°C within 105min to 135min. Furthermore, the parameters of the first stage slow cooling are: cooling from the tempering temperature to 320℃~330℃ within 50min~70min; the parameters of the second stage slow cooling are: cooling from 190℃~200℃ within 90min~110min; the parameters of the third stage slow cooling are: cooling from 320℃~330℃ to 90℃~110℃ within 90min~110min; the parameters of the fourth stage slow cooling are: cooling from 90℃~110℃ to 30℃~45℃ within 110min~130min. Further, the parameters of the first slow cooling are: cooling from the tempering temperature to 325°C to 330°C within 55min to 65min; the parameters of the second slow cooling are: cooling to 195°C to 200°C within 95min to 100min; the parameters of the second slow cooling are: cooling from 195°C to 200°C to 95°C to 100°C within 95min to 100min; the parameters of the third slow cooling are: cooling to 30°C to 40°C within 115min to 125min. In an optional specific example, the parameters of the first slow cooling are: cooling from the tempering temperature to 325°C within 60min; the parameters of the second slow cooling are: cooling to 200°C within 100min; the parameters of the third slow cooling are: cooling to 100°C within 100min; the parameters of the third slow cooling are: cooling from 100°C to 35°C within 120min.

[0061] Of course, preheating and heat preservation are carried out in the preheating furnace; tempering is carried out in the tempering furnace; salt dripping is carried out above the tempering furnace; annealing and slow cooling are carried out in the annealing furnace. At the end of annealing, when the annealing temperature is below 50°C, the glass is transferred out of the annealing furnace. After the glass is completely cooled to room temperature, it is desalted and cleaned. Specifically, the desalting step includes: after the annealed flexible ultra-thin glass is cooled to room temperature, it is soaked in clean water for more than 30 minutes.

[0062] The stress value, stress depth and bending radius of the flexible ultra-thin tempered glass obtained by the above-mentioned flexible ultra-thin glass tempering method were measured using a tempered glass surface pressure gauge and a bending instrument. It was found that the stress value of the flexible ultra-thin tempered glass was 780MPa~880MPa, the stress layer depth was 5μm~9μm, and the limiting crushing radius was ≦1.5mm.

[0063] In some embodiments, before placing the flexible ultra-thin glass to be tempered in the supporting device, the step of acid-treating the flexible ultra-thin glass to be tempered is also included. The flexible ultra-thin glass to be tempered generally has many uneven areas and surface microcracks, which can easily lead to reduced strength of the glass and eventual rupture. Generally, rupture starts from surface microcracks, and stress is concentrated at the tip of the microcracks. As the driving force for the expansion of the microcracks, the microcracks continue to expand, and finally cause the glass to break. Acid treatment can reduce fine cracks and uneven areas on the flexible ultra-thin glass to be tempered, improve the strength of the flexible ultra-thin glass to be tempered, so that the flexible ultra-thin glass to be tempered is not easy to break after tempering treatment, and further improve the tempering yield.

[0064] Specifically, the acid treatment step includes: placing the flexible ultra-thin glass to be tempered in an acid solution for etching for 10s to 60s, wherein the acid solution includes water, a sulfuric acid solution with a mass percentage of 95% to 98%, and a hydrofluoric acid solution with a mass concentration of not less than 40%, and the volume ratio of the sulfuric acid solution, the hydrofluoric acid solution and the water is (3 to 7): (8 to 12): (81 to 89). In an optional specific example, the volume ratio of the sulfuric acid solution, the hydrofluoric acid solution and the water is 3:8:89, 5:10:85 or 7:12:81. Further, the acid solution includes water, a sulfuric acid solution with a mass percentage of 95% to 98%, and a hydrofluoric acid solution with a mass concentration of not less than 40%, and the volume ratio of the sulfuric acid solution, the hydrofluoric acid solution and the water is (4 to 7): (8 to 12): (81 to 88). Furthermore, the acid solution includes water, a sulfuric acid solution with a mass percentage of 95% to 98% and a hydrofluoric acid solution with a mass concentration of not less than 40%, and the volume ratio of the sulfuric acid solution, the hydrofluoric acid solution and water is (5 to 7): (9 to 12): (81 to 86).

[0065] Of course, after the acid treatment is completed, the step of washing the acid-treated flexible ultra-thin glass with water to remove the acid solution is also included. Of course, after the step of washing the acid-treated flexible ultra-thin glass with water, the step of removing the water left by washing on the flexible ultra-thin glass is also included.

[0066] In addition, an embodiment of the present application further provides a flexible ultra-thin tempered glass, which is produced by the above-mentioned flexible ultra-thin glass tempering method.

[0067] Specifically, the stress value of the flexible ultra-thin tempered glass is 780MPa to 880MPa, the stress layer depth is 5μm to 9μm, and the limit crushing radius is ≦1.5mm. Specific embodiments

[0069] The following is a detailed description with reference to specific embodiments. The following embodiments do not include components other than unavoidable impurities unless otherwise specified. The reagents and instruments used in the embodiments are conventionally selected in the art unless otherwise specified. The experimental methods for which specific conditions are not specified in the embodiments are implemented under conventional conditions, such as the conditions described in the literature or books, or the methods recommended by the manufacturer. The flexible glass to be tempered in the following embodiments and comparative examples is KK6 high-aluminum ultra-white glass produced by Xianning CSG Optoelectronic Glass Co., Ltd., and its dimensions are: 100 mm to 200 mm in length, 40 mm to 120 mm in width, and 25 μm to 100 μm in thickness.

[0070] Example 1

[0071] The method for preparing the flexible ultra-thin tempered glass of this embodiment mainly comprises: Figure 1 The supporting device shown is made by tempering the flexible glass to be tempered, and the specific steps include:

[0072] (1) Acid treatment

[0073] a). Prepare a mixed acid solution consisting of sulfuric acid solution (H2SO4 mass percentage is 95%-98%, Xilong Scientific Co., Ltd., high-grade purity), hydrofluoric acid solution (HF mass percentage is ≥40%, Guangdong Guanghua Chemical Factory Co., Ltd., analytical pure) and water (deionized water). In the mixed acid solution, the volume ratio of sulfuric acid solution, hydrofluoric acid solution and water is 5:10:85.

[0074] b) The flexible ultra-thin glass to be tempered is placed in a mixed acid solution, the etching solution temperature is 25° C., and the etching time is 15 s.

[0075] c) The ultra-thin glass after acid treatment is cleaned with deionized water to remove surface water.

[0076] (2) The acid-treated flexible ultra-thin glass is inserted into a tempering frame and then placed in a tempering furnace, and preheated, tempered and annealed according to the parameters in Table 1. The preheating adopts a three-stage preheating method, and the annealing also adopts a three-stage slow cooling method. The salt dripping time is 10 minutes.

[0077] (3) After annealing, cool to 45°C and remove from the tempering furnace.

[0078] (4) After the annealed flexible ultra-thin glass is cooled to 25° C., it is placed in clean water and soaked for 40 minutes. It is then rinsed with clean water and dried to prepare the flexible ultra-thin tempered glass of this embodiment.

[0079] (2) The stress value, stress layer depth and limit crushing radius of the flexible ultra-thin tempered glass of this embodiment were measured using a tempered glass surface pressure gauge and a bending instrument. The results are shown in Table 1.

[0080] Example 2

[0081] The preparation method of the flexible ultra-thin tempered glass of this embodiment is substantially the same as that of Embodiment 1, except that the preparation parameters are different. The parameters in the preparation method of the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1. The performance test results of the flexible ultra-thin tempered glass prepared by the preparation method of the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1.

[0082] Example 3

[0083] The method for preparing the flexible ultra-thin tempered glass of this embodiment is substantially the same as that of Embodiment 1, except that the preparation parameters are different. The parameters in the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1. The performance test results of the flexible ultra-thin tempered glass prepared by the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1.

[0084] Example 4

[0085] The method for preparing the flexible ultra-thin tempered glass of this embodiment is substantially the same as that of Embodiment 1, except that the preparation parameters are different. The parameters in the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1. The performance test results of the flexible ultra-thin tempered glass prepared by the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1.

[0086] Example 5

[0087] The method for preparing the flexible ultra-thin tempered glass of this embodiment is substantially the same as that of Embodiment 1, except that the preparation parameters are different. The parameters in the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1. The performance test results of the flexible ultra-thin tempered glass prepared by the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1.

[0088] Example 6

[0089] The method for preparing the flexible ultra-thin tempered glass of this embodiment is substantially the same as that of Embodiment 1, except that the preparation parameters are different. The parameters in the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1. The performance test results of the flexible ultra-thin tempered glass prepared by the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1.

[0090] Example 7

[0091] The method for preparing the flexible ultra-thin tempered glass of this embodiment is substantially the same as that of Embodiment 1, except that the preparation parameters are different. The parameters in the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1. The performance test results of the flexible ultra-thin tempered glass prepared by the method for preparing the flexible ultra-thin tempered glass of this embodiment are detailed in Table 1.

[0092] Table 1

[0093]

[0094]

[0095] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-described embodiments only express several implementation methods of the present invention, which are convenient for understanding the technical solutions of the present invention in detail, but they cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided by the present invention are all within the protection scope of the claims attached to the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the contents of the attached claims, and the description and drawings can be used to interpret the contents of the claims.

Claims

1. A supporting device, characterized in that: The support device comprises a frame, a bracket and a concave-convex part, the bracket comprises an auxiliary unit and a support part, the auxiliary unit is located in the frame and fixed on the frame, the support part is located in the frame and fixed on the frame, the auxiliary unit and the support part together form a storage space capable of storing the glass to be tempered; the concave-convex part is provided on one side of the support part close to the storage space and one side of the auxiliary unit close to the storage space to reduce the contact area between the support device and the glass to be tempered; There are a plurality of support members, the plurality of support members are arranged at intervals, and the plurality of support members and the auxiliary unit together form the accommodation space; The concave-convex part is a metal part, which is wavy and fixed on the bracket.

2. The support device according to claim 1, characterized in that: The concave-convex part comprises a concave-convex portion for contacting the glass to be tempered, and the concave-convex portion is wavy or sawtooth-shaped.

3. The supporting device according to claim 2, characterized in that: The spacing between the troughs of the concave-convex parts is 4.5 mm to 5.5 mm.

4. The supporting device according to claim 2, characterized in that: The height of the concavo-convex portion is 3.5 mm to 4.5 mm; the angle between the line connecting the wave trough of the concavo-convex portion and the wave crest of the concavo-convex portion and the plane where the wave trough of the concavo-convex portion is located is 35° to 55°.

5. The supporting device according to any one of claims 1 to 4, characterized in that: The frame body has a bottom top surface and a bottom surface opposite to the top surface, the support member is in a strip shape, and the support member is close to the bottom surface; the auxiliary unit includes two auxiliary members arranged at intervals, and the auxiliary member includes at least two cross-connected baffles, and the surfaces of all the baffles close to the glass to be tempered are coplanar, the two auxiliary members and the support member together form the accommodating space, and the side of the baffle close to the accommodating space and the side of the support member close to the top surface are both provided with the concave and convex parts.

6. The supporting device according to claim 5, characterized in that: The bracket also includes a fixing piece, and the auxiliary unit is fixed to the frame through the fixing piece, and the fixing piece is in a strip shape, and the length direction of the fixing piece is the same as the length direction of the supporting piece; the fixing piece includes a top fixing piece and a bottom fixing piece spaced from the top fixing piece, the top fixing piece is close to the top surface, and the bottom fixing piece is close to the bottom surface, and the blocking piece is in a strip shape, one end of the blocking piece is fixedly connected to the bottom fixing piece, and the other end is fixedly connected to the top fixing piece.

7. The supporting device according to claim 5, characterized in that: The interval between two auxiliary parts in the same auxiliary unit is 8mm~12mm.

8. The support device according to any one of claims 1 to 4 and 6 to 7, characterized in that: There are a plurality of auxiliary units, and the auxiliary units and the supporting members are crisscrossed to form a plurality of accommodating spaces.

9. A method for tempering flexible ultra-thin glass, characterized in that: The following steps are involved: The flexible ultra-thin glass to be tempered is placed in a supporting device for tempering treatment, wherein the supporting device comprises a frame, a bracket and a concave-convex part, the bracket comprises an auxiliary unit and a supporting part, the auxiliary unit is located in the frame and fixed on the frame, the supporting part is located in the frame and fixed on the frame, the auxiliary unit and the supporting part together form a storage space that can accommodate the glass to be tempered; the concave-convex part is provided on one side of the supporting part close to the storage space and on one side of the auxiliary unit close to the storage space to reduce the contact area between the supporting device and the glass to be tempered.

10. The tempering method according to claim 9, characterized in that: Before placing the flexible ultra-thin glass to be tempered in the supporting device, the method further includes subjecting the flexible ultra-thin glass to be tempered to acid treatment, wherein the acid treatment step includes: The flexible ultra-thin glass to be tempered is placed in an acid solution for etching for 10s to 60s, wherein the acid solution comprises water, a sulfuric acid solution with a mass percentage of 95% to 98% and a hydrofluoric acid solution with a mass percentage of not less than 40%, and the volume ratio of the sulfuric acid solution, the hydrofluoric acid solution and the water is (3-7): (8-12): (81-89).

11. The tempering method according to claim 9 or 10, characterized in that: The tempering treatment step comprises: preheating, tempering and annealing the flexible ultra-thin glass to be tempered in sequence; The preheating includes first stage preheating, second stage preheating and third stage preheating in sequence, wherein the parameters of the first stage preheating are: heating from room temperature to 135°C~165°C; the parameters of the second stage preheating are: heating from 135°C~165°C to 225°C~255°C; the parameters of the third stage preheating are: heating from 225°C~255°C to 365°C~395°C and then keeping warm for 25min~35min; The tempering temperature is 365°C to 405°C, the tempering time is 10min to 30min, and the salt dripping time during the tempering process is 5min to 12min; The annealing includes sequentially performing a first stage slow cooling, a second stage slow cooling, a third stage slow cooling and a fourth stage slow cooling, wherein the parameters of the first stage slow cooling are: cooling from the tempering temperature to 315°C-335°C within 45min-75min; the parameters of the second stage slow cooling are: cooling from 315°C-335°C to 185°C-215°C within 90min-135min; the parameters of the third stage slow cooling are: cooling from 185°C-215°C to 85°C-115°C within 85min-115min; the parameters of the fourth stage slow cooling are: cooling from 85°C-115°C to 25°C-50°C within 105min-135min.

12. A flexible ultra-thin tempered glass, characterized in that: The flexible ultra-thin glass is prepared by the tempering treatment method of any one of claims 9 to 11.

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