CN113173708A - Processing method for improving bending performance of flexible glass - Google Patents
Processing method for improving bending performance of flexible glass Download PDFInfo
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- CN113173708A CN113173708A CN202110259328.5A CN202110259328A CN113173708A CN 113173708 A CN113173708 A CN 113173708A CN 202110259328 A CN202110259328 A CN 202110259328A CN 113173708 A CN113173708 A CN 113173708A
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- 239000011521 glass Substances 0.000 title claims abstract description 201
- 238000005452 bending Methods 0.000 title claims abstract description 51
- 238000003672 processing method Methods 0.000 title claims abstract description 19
- 238000005530 etching Methods 0.000 claims abstract description 87
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 22
- 238000004026 adhesive bonding Methods 0.000 claims description 16
- 239000003292 glue Substances 0.000 claims description 16
- 150000003839 salts Chemical class 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 11
- CBOIHMRHGLHBPB-UHFFFAOYSA-N hydroxymethyl Chemical compound O[CH2] CBOIHMRHGLHBPB-UHFFFAOYSA-N 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical group [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical group [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- 239000004323 potassium nitrate Substances 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims description 2
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 2
- 238000001723 curing Methods 0.000 description 12
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- 230000000052 comparative effect Effects 0.000 description 8
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- 229910002651 NO3 Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000003486 chemical etching Methods 0.000 description 2
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- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 1
- AWFYPPSBLUWMFQ-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,6,7-tetrahydropyrazolo[4,3-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=C2 AWFYPPSBLUWMFQ-UHFFFAOYSA-N 0.000 description 1
- CONKBQPVFMXDOV-QHCPKHFHSA-N 6-[(5S)-5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-2-oxo-1,3-oxazolidin-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C[C@H]1CN(C(O1)=O)C1=CC2=C(NC(O2)=O)C=C1 CONKBQPVFMXDOV-QHCPKHFHSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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- -1 polyethylene terephthalate Polymers 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
The invention discloses a processing method for improving the bending performance of flexible glass, which comprises the following steps: cutting, etching, debonding and chemically toughening the multilayer glued flexible glass to obtain flexible glass with enhanced bending performance; the multilayer glued flexible glass comprises a bottom plate positioned at the lowest layer and at least 1 repeating unit layer glued on the upper layer of the bottom plate, the repeating unit layer comprises flexible glass positioned at the lower layer and a substrate glued on the upper layer of the flexible glass, and the repeating unit layers are glued together. The processing method for improving the bending performance of the flexible glass can obviously improve the bending performance of the flexible glass.
Description
Technical Field
The invention belongs to the field of flexible glass processing, and particularly relates to a processing method for improving the bending performance of flexible glass.
Background
The flexible glass refers to ultrathin glass with the thickness of less than or equal to 0.1 mm. The flexible glass not only has the hardness, transparency, heat resistance, insulativity and stable mechanical and chemical properties under oxidation and illumination conditions of the glass, but also has the characteristics of being bendable, even foldable, light in weight, machinable and the like. Currently, flexible glass has begun to be used in foldable cellular phones. For a foldable mobile phone using flexible glass as cover glass, it is critical to improve the bending performance of the flexible glass and ensure the reliability of the mobile phone.
Most of the existing methods for improving the bending performance of the flexible glass adopt a chemical rigidization method so as to improve the surface compressive stress of the glass and ensure the depth of a stress layer. However, the bending performance of the flexible glass is not only related to the strengthening of the glass, but also has a great relationship with the end surface defects and shapes of the glass. During the processing of the glass, the cutting and breaking process causes the notch phenomenon of the glass end face, and the defects cause stress concentration and reduce the bending strength of the glass.
The defects can be eliminated by edging and polishing for thicker glass, but the flexible glass cannot be eliminated by the means, and the section defects caused by the flexible glass in the processing process can be eliminated only by chemical etching. However, how to better eliminate the fracture defects of the flexible glass by using chemical etching is a challenge to be further researched and challenging to improve the bending performance of the flexible glass.
Disclosure of Invention
Based on the technical problems, the invention provides a processing method for improving the bending performance of flexible glass, and the processing method can obviously improve the bending performance of the flexible glass.
The technical scheme of the invention is as follows:
a processing method for improving the bending performance of flexible glass comprises the following steps: cutting, etching, debonding and chemically toughening the multilayer glued flexible glass to obtain flexible glass with enhanced bending performance; the multilayer glued flexible glass comprises a bottom plate positioned at the lowest layer and at least 1 repeating unit layer glued on the upper layer of the bottom plate, the repeating unit layer comprises flexible glass positioned at the lower layer and a substrate glued on the upper layer of the flexible glass, and the repeating unit layers are glued together.
The flexible glass in the repeating unit layer of the present invention can be prepared by any method, such as, but not limited to, the following methods: and gluing one surface of the glass original sheet with the lining plate glass through UV glue, performing acid-proof treatment on the other surface of the lining plate glass, which is not glued with the glass original sheet, and performing chemical thinning, dispergation and separation to obtain the flexible glass.
The thickness of the flexible glass is not particularly limited in the present invention, and for example, the thickness of the flexible glass is 100 μm or less, preferably 90 μm or less, and more preferably 80 μm or less. Particularly preferably 50 μm or less, even more preferably 30 μm or less, and the thickness may be at least 20 μm.
Preferably, the etching specific process is as follows: immersing the cut multi-layer glued flexible glass into etching solution for etching for 2-20 min; the temperature of the etching solution is 30-80 ℃.
Preferably, the etching time is 8-10min, and the temperature of the etching solution is 40-55 ℃.
Preferably, the etching solution includes: 2-8 wt% HF, 4-10 wt% H2SO4、7-15wt％(CH2OH)2The balance being H2O。
Preferably, the cut multi-ply glued flexible glass is vibrated and/or rotated in the etching liquid during etching.
Preferably, the vibration frequency is 10-50 times/min, and the rotation speed is 2-10 r/min; more preferably, the vibration frequency is 20-40 times/min, and the rotation speed is 4-8 r/min.
The vibration and rotation may be by, but are not limited to, the following means: the cut multilayer glued flexible glass is placed in a frame in an etching bath, a vibrator is fixed at the bottom of the frame after being sealed, and the vibrator is driven by a motor to rotate, so that the multilayer glued flexible glass vibrates and/or rotates in the etching bath at a certain speed and frequency.
Preferably, the chemical tempering comprises the following specific processes: immersing the flexible glass obtained by dispergation into molten salt, and chemically rigidizing for 8-20min at the temperature of 360-400 ℃ to obtain chemically toughened flexible glass; more preferably, the molten salt is a potassium salt; particularly preferably, the molten salt is a potassium nitrate molten salt.
Preferably, the gluing is carried out by using UV glue, and the coating thickness of the UV glue is 10-100 μm; more preferably, the UV glue is applied in a thickness of 15-25 μm.
Preferably, the UV glue is a UV thermal or UV hydrolysis glue.
Preferably, the multilayer glued flexible glass comprises at least 10 layers of repeating units; more preferably, the multilayer glued flexible glass comprises 10-15 layers of repeating units.
Has the advantages that:
the invention provides a processing method for improving the bending performance of flexible glass, which can obviously improve the bending performance of the flexible glass. When the processing method is adopted to prepare the flexible glass, the flexible glass is endowed with excellent bending performance, the breakage rate of the processing process is reduced, the yield is improved, and the production cost is reduced.
(1) According to the invention, before cutting, the flexible glass is processed into the multi-layer glued flexible glass, the multi-layer glued flexible glass comprises a bottom plate positioned at the lowest layer and at least 1 repeating unit layer glued on the upper layer of the bottom plate, the repeating unit layer comprises the flexible glass positioned at the lower layer and a substrate glued on the upper layer of the flexible glass, and the repeating unit layers are glued together. The structure overcomes the damage of the flexible glass caused by the processes of gluing, laminating, curing and pressing the multilayer flexible glass in the prior art, and particularly the damage directly influences the bending performance of the flexible glass on the flexible glass with the thickness less than or equal to 50 mu m;
(2) in a preferred scheme, during etching, etching liquid is immersed into an interface between UV glue and flexible glass at a specific etching temperature to generate etching action on the surface of the flexible glass, micro-cracks on the surface of the flexible glass can be removed within the etching time, and the etching liquid gradually erodes inwards along the end part of the flexible glass along with the gradual glue dissolving of the UV glue, so that a trapezoidal edge shape is etched at the edge part of the flexible glass, and the bending performance of the flexible glass can be improved by the trapezoidal edge shape;
(3) in a preferred scheme, during etching, the residues of the etched flexible glass can be prevented from being attached to the surface of the flexible glass to a certain extent by the vibration of the multi-layer glued flexible glass, and the deposited residues are removed to obtain a smooth flexible glass surface; furthermore, reaction products attached to the surface of the flexible glass are better removed through rotation of the multi-layer glued flexible glass, the etching speed is accelerated, and a smoother flexible glass surface is obtained, so that the bending performance of the flexible glass is improved.
Drawings
FIG. 1 is a schematic structural view of a multi-ply glued flexible glass;
FIG. 2 is an optical micrograph of the edge of the flexible glass prepared in example 1;
FIG. 3 is a schematic view of a method for detecting bending property of flexible glass;
Detailed Description
Hereinafter, the technical solution of the present invention will be described in detail by specific examples, but these examples should be explicitly proposed for illustration, but should not be construed as limiting the scope of the present invention.
Example 1
(1) Preparing multi-layer glued flexible glass: coating UV (ultraviolet) pyrolytic gel with the thickness of 15 microns on the upper surface of the flexible glass with the thickness of 30 microns by using a slit coater, and covering the substrate on the upper surface of the flexible glass coated with the UV pyrolytic gel to obtain 1 repeating unit layer; repeating the steps to obtain 2-10 th repeating unit layers, gluing and laminating the repeating unit layers, gluing the flexible glass on the lowermost layer of the glued and laminated repeating unit layers on a bottom plate, flattening by using a laminating machine, and curing by using an ultraviolet curing machine to obtain multilayer glued flexible glass;
(2) cutting: cutting the multi-layer glued flexible glass obtained in the step (1) into 8 inches, and carrying out CNC edge grinding treatment;
(3) etching: the cut and processed multilayer glued flexible glass enters an etching tank loaded with etching solution, and the etching solution comprises the following components: 3 wt% HF, 5 wt% H2SO4、10wt％(CH2OH)2、82wt％H2O; the temperature of the etching solution is 40 ℃, and the etching time is 8 min; during etching, the multi-layer glued flexible glass is vibrated and rotated in an etching tank, the vibration frequency is 25 times/min, and the rotation speed is 7 r/min;
(4) dispergation and chemical rigidization: the etched and multi-layer glued flexible glass is peptized in hot water to obtain 10 pieces of flexible glass, and the flexible glass is soaked in K after being cleaned2NO3And (3) chemically rigidizing in molten salt for 10min at 380 ℃ to obtain the flexible glass with enhanced bending performance. An optical micrograph of the flexible glass edge with enhanced bending properties is shown in figure 2.
Example 2
(1) Preparing multi-layer glued flexible glass: coating UV (ultraviolet) pyrolytic gel with the thickness of 15 microns on the upper surface of the flexible glass with the thickness of 30 microns by using a slit coater, and covering the substrate on the upper surface of the flexible glass coated with the UV pyrolytic gel to obtain 1 repeating unit layer; repeating the steps to obtain 2-10 th repeating unit layers, gluing and laminating the repeating unit layers, gluing the flexible glass on the lowermost layer of the glued and laminated repeating unit layers on a bottom plate, flattening by using a laminating machine, and curing by using an ultraviolet curing machine to obtain multilayer glued flexible glass;
(2) cutting: cutting the multi-layer glued flexible glass obtained in the step (1) into 8 inches, and carrying out CNC edge grinding treatment;
(3) etching: the cut and edge-polished multi-layer glued flexible glass enters an etching tank loaded with etching solution, and the etching solution comprises the following components: 3 wt% HF, 5 wt% H2SO4、10wt％(CH2OH)2、82wt％H2O; the temperature of the etching solution is 45 ℃, and the etching time is 8 min; during etching, the multi-layer glued flexible glass is vibrated and rotated in an etching tank, the vibration frequency is 30 times/min, and the rotation speed is 6 r/min;
(4) dispergation and chemical rigidization: the etched and multi-layer glued flexible glass is peptized in hot water to obtain 10 pieces of flexible glass, and the flexible glass is soaked in K after being cleaned2NO3And (3) chemically rigidizing in molten salt for 10min at 380 ℃ to obtain the flexible glass with enhanced bending performance.
Example 3
(1) Preparing multi-layer glued flexible glass: coating UV (ultraviolet) pyrolytic gel with the thickness of 15 microns on the upper surface of the flexible glass with the thickness of 30 microns by using a slit coater, and covering the substrate on the upper surface of the flexible glass coated with the UV pyrolytic gel to obtain 1 repeating unit layer; repeating the steps to obtain 2-10 th repeating unit layers, gluing and laminating the repeating unit layers, gluing the flexible glass on the lowermost layer of the glued and laminated repeating unit layers on a bottom plate, flattening by using a laminating machine, and curing by using an ultraviolet curing machine to obtain multilayer glued flexible glass;
(2) cutting: cutting the multi-layer glued flexible glass obtained in the step (1) into 8 inches, and carrying out CNC edge grinding treatment;
(3) etching: the cut and edge-polished multi-layer glued flexible glass enters an etching tank loaded with etching solution, and the etching solution comprises the following components: 3 wt% HF, 5 wt% H2SO4、10wt％(CH2OH)2、82wt％H2O; the temperature of the etching solution is 55 ℃, and the etching time is 9 min;during etching, the multi-layer glued flexible glass is vibrated and rotated in an etching tank, the vibration frequency is 40 times/min, and the rotation speed is 7 r/min;
(4) dispergation and chemical rigidization: the etched and multi-layer glued flexible glass is peptized in hot water to obtain 10 pieces of flexible glass, and the flexible glass is soaked in K after being cleaned2NO3And (3) chemically rigidizing in molten salt for 10min at 380 ℃ to obtain the flexible glass with enhanced bending performance.
Example 4
(1) Preparing multi-layer glued flexible glass: coating UV (ultraviolet) pyrolytic gel with the thickness of 25 mu m on the upper surface of the flexible glass with the thickness of 50 mu m by using a slit coater, and covering the substrate on the upper surface of the flexible glass coated with the UV pyrolytic gel to obtain 1 repeating unit layer; repeating the steps to obtain 2 nd to 15 th repeating unit layers, gluing and laminating the repeating unit layers, gluing the flexible glass on the lowermost layer of the glued and laminated repeating unit layers on the bottom plate, flattening by using a laminating machine, and curing by using an ultraviolet curing machine to obtain multilayer glued flexible glass;
(2) cutting: cutting the multi-layer glued flexible glass obtained in the step (1) into 6 inches, and carrying out CNC edge grinding treatment;
(3) etching: the cut and edge-polished multi-layer glued flexible glass enters an etching tank loaded with etching solution, and the etching solution comprises the following components: 8 wt% HF, 10 wt% H2SO4、15wt％(CH2OH)2、67wt％H2O; the temperature of the etching solution is 30 ℃, and the etching time is 20 min; during etching, the multi-layer glued flexible glass is vibrated and rotated in an etching tank, the vibration frequency is 50 times/min, and the rotation speed is 2 r/min;
(4) dispergation and chemical rigidization: the etched multi-layer glued flexible glass is subjected to hot water peptization to obtain 15 pieces of flexible glass, and the glass is soaked in K after being cleaned2SO4And (3) chemically rigidizing in molten salt for 20min at 360 ℃ to obtain the flexible glass with enhanced bending performance.
Example 5
(1) Preparing multi-layer glued flexible glass: coating UV pyrolytic gel with the thickness of 100 mu m on the upper surface of the flexible glass with the thickness of 40 mu m by using a slit coater, and covering the substrate on the coated upper surface of the flexible glass to obtain 1 repeating unit layer; gluing the flexible glass on the lower layer of the repeating unit layer on a bottom plate, flattening by using a laminating machine, and curing by using an ultraviolet curing machine to obtain the multi-layer glued flexible glass;
(2) cutting: cutting the multi-layer glued flexible glass obtained in the step (1) into 7 inches, and carrying out CNC edge grinding treatment;
(3) etching: the cut and edge-polished multi-layer glued flexible glass enters an etching tank loaded with etching solution, and the etching solution comprises the following components: 5 wt% HF, 4 wt% H2SO4、7wt％(CH2OH)2、84wt％H2O; the temperature of the etching solution is 80 ℃, and the etching time is 3 min; during etching, the multi-layer glued flexible glass is vibrated and rotated in an etching tank, the vibration frequency is 10 times/min, and the rotation speed is 10 r/min;
(4) dispergation and chemical rigidization: and (3) carrying out hot peptization on the etched and multi-layer glued flexible glass to obtain 1 piece of flexible glass, washing, immersing into KCl molten salt, and carrying out chemical rigidization for 8min at 400 ℃ to obtain the flexible glass with enhanced bending performance.
Example 6
Compared with the embodiment 1, the etching process is only adjusted to' the flexible glass glued by multiple layers after cutting and edging treatment enters an etching tank loaded with etching solution, and the etching solution comprises the following components: 3 wt% HF, 5 wt% H2SO4、10wt％(CH2OH)2、82wt％H2O; the temperature of the etching solution is 40 ℃, the etching time is 8 min', namely, the multi-layer glued flexible glass is not vibrated and rotated in the etching tank during etching, and the method is otherwise the same as the method in the embodiment 1.
Comparative example 1
Compared with embodiment 1, only the etching step is omitted, and the rest is the same as embodiment 1.
Comparative example 2
In comparison with example 1, the procedure of step (1) was conducted in the same manner as in example 1 except that "UV thermal decomposition glue having a thickness of 15 μm was applied to the upper and lower surfaces of a flexible glass sheet having a thickness of 30 μm by means of a slit coater, 10 sheets of the flexible glass sheet were laminated together in this manner, pressed flat by means of a laminator, and cured by means of an ultraviolet curing machine to obtain a laminated flexible glass sheet".
Experimental example 1
The bending performance of the flexible glass is detected according to the following method: the upper surface and the lower surface of the flexible glass are respectively covered with PET (polyethylene terephthalate) films and OCA (optically clear adhesive) films through a film laminating machine, and when a plurality of pieces of flexible glass are continuously measured, the interval between every two pieces of flexible glass is kept to be 2cm, so that a continuous flexible glass detection belt is formed. The upper surface and the lower surface of the flexible glass detection belt pass through the two metal rollers at a certain speed, the flexible glass with poor bending performance is broken under the action of tension, and the bending performance of the flexible glass is evaluated by counting the breakage rate of the flexible glass. The schematic diagram of the flexible glass bending performance detection method is shown in the attached figure 3, wherein 2 is a metal roller, and 1 is a flexible glass detection belt.
100 pieces of flexible glass were prepared according to the methods of examples 1 to 6 and comparative examples 1 to 2, respectively, and bending property tests were performed according to the methods described above, and the test results are shown in Table 1 below.
Results of bending Performance test of the flexible glasses prepared in Table 1, examples 1 to 6 and comparative examples 1 to 2
| Number of crushing pieces (/ piece) | Percentage of breakage (%) | |
| Example 1 | 2 | 2 |
| Example 2 | 1 | 1 |
| Example 3 | 2 | 2 |
| Example 4 | 2 | 2 |
| Example 5 | 1 | 1 |
| Example 6 | 10 | 10 |
| Comparative example 1 | 30 | 30 |
| Comparative example 2 | 15 | 15 |
As can be seen from the above experimental data: (1) the bending performance of the flexible glass prepared in example 6 is obviously higher than that of comparative example 1, but is far lower than that of example 1. The reason is considered that the flexible glass does not vibrate and rotate in the etching process, only stands in the etching solution, so that the etching product of the flexible glass is attached to the surface of the flexible glass, the etching of the surface of the flexible glass is uneven, the surface of the flexible glass is rough, the improvement of the bending performance of the flexible glass is influenced, the etching speed of the etching solution on the surface of the flexible glass is slow due to the fact that the etching product of the flexible glass is attached to the surface of the flexible glass, the shapes of four edges of the flexible glass cannot be consistent, the surface defect of the glass is caused, and the improvement range of the bending performance of the glass is limited. (2) The bending properties of the flexible glass prepared in comparative example 2 are much lower than those of example 1. The reason is that the multi-layer flexible glass can be pressed during gluing operation, and the multi-layer glued flexible glass structure can protect the flexible glass during gluing, reduce the damage to the flexible glass during the gluing process and provide guarantee for improving the bending performance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The processing method for improving the bending performance of the flexible glass is characterized by comprising the following steps of: cutting, etching, debonding and chemically toughening the multilayer glued flexible glass to obtain flexible glass with enhanced bending performance; the multilayer glued flexible glass comprises a bottom plate positioned at the lowest layer and at least 1 repeating unit layer glued on the upper layer of the bottom plate, the repeating unit layer comprises flexible glass positioned at the lower layer and a substrate glued on the upper layer of the flexible glass, and the repeating unit layers are glued together.
2. The processing method for improving the bending property of the flexible glass according to claim 1, wherein the specific etching process comprises the following steps: immersing the cut multi-layer glued flexible glass into etching solution for etching for 2-20 min; the temperature of the etching solution is 30-80 ℃.
3. The processing method for improving the bending property of the flexible glass according to claim 2, wherein the etching time is 8-10min, and the temperature of the etching solution is 40-55 ℃.
4. According to claim 2 or claim 2The processing method for improving the bending performance of the flexible glass is characterized in that the etching solution comprises: 2-8 wt% HF, 4-10 wt% H2SO4、7-15wt％(CH2OH)2The balance being H2O。
5. The processing method for improving the bending property of the flexible glass according to any one of claims 2 to 4, wherein the cut multi-layer glued flexible glass is vibrated and/or rotated in the etching solution during etching.
6. The processing method for improving the bending property of the flexible glass according to claim 5, wherein the vibration frequency is 10 to 50 times/min, and the rotation speed is 2 to 10 r/min; preferably, the vibration frequency is 20-40 times/min, and the rotation speed is 4-8 r/min.
7. The processing method for improving the bending property of the flexible glass according to any one of claims 1 to 6, wherein the chemical tempering comprises the following specific steps: immersing the flexible glass obtained by dispergation into molten salt, and chemically rigidizing for 8-20min at the temperature of 360-400 ℃ to obtain chemically toughened flexible glass; preferably, the molten salt is a potassium salt; more preferably, the molten salt is a potassium nitrate molten salt.
8. The processing method for improving the bending property of the flexible glass according to any one of claims 1 to 7, wherein the gluing is performed by using UV glue, and the coating thickness of the UV glue is 10 μm to 100 μm; preferably, the UV glue is applied in a thickness of 15-25 μm.
9. The processing method for improving the bending property of the flexible glass according to claim 8, wherein the UV glue is a UV thermal-decomposition glue or a UV hydrolysis glue.
10. The process of improving the bending performance of a flexible glass according to any of claims 1-9, wherein the multi-ply glued flexible glass comprises at least 10 repeating unit plies; preferably, the multi-ply glued flexible glass comprises 10-15 layers of repeating units.
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