CN117819829A - Preparation method of 3D flexible glass - Google Patents
Preparation method of 3D flexible glass Download PDFInfo
- Publication number
- CN117819829A CN117819829A CN202311760975.XA CN202311760975A CN117819829A CN 117819829 A CN117819829 A CN 117819829A CN 202311760975 A CN202311760975 A CN 202311760975A CN 117819829 A CN117819829 A CN 117819829A
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- China
- Prior art keywords
- glass
- groove body
- edge
- acid
- cutting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000011521 glass Substances 0.000 title claims abstract description 148
- 238000002360 preparation method Methods 0.000 title abstract description 18
- 238000005530 etching Methods 0.000 claims abstract description 30
- 238000005520 cutting process Methods 0.000 claims abstract description 29
- 238000005496 tempering Methods 0.000 claims abstract description 25
- 230000001681 protective effect Effects 0.000 claims abstract description 23
- 238000007650 screen-printing Methods 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000003698 laser cutting Methods 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 claims description 29
- 239000002253 acid Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 23
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 8
- 239000004323 potassium nitrate Substances 0.000 claims description 5
- 235000010333 potassium nitrate Nutrition 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000007639 printing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 description 7
- 238000000227 grinding Methods 0.000 description 6
- 238000005728 strengthening Methods 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910001414 potassium ion Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910001415 sodium ion Inorganic materials 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000037237 body shape Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/34—Printing on other surfaces than ordinary paper on glass or ceramic surfaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/0222—Scoring using a focussed radiation beam, e.g. laser
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention discloses a preparation method of 3D flexible glass, which is characterized by comprising the following steps: thinning a processing groove body, carrying out glass silk screen printing, laser cutting, dispensing, cutting off, CNC (computer numerical control), edge polishing treatment, edge etching, chemical tempering, surface etching and ultrasonic cleaning; then, when the groove body is thinned, a protective film is covered on the outer surface of the whole glass, and the shape of the groove body is reserved on the upper surface of the glass when the protective film is covered; removing the protective film on the upper surface of the glass before the glass screen printing; when glass is silk-screened, dot-shaped or strip-shaped patterns are silk-screened at the bottom of the groove body, the whole surface of the upper surface of the glass except the bottom of the groove body is silk-screened with acid-proof ink, and the part which is not covered with the acid-proof ink is etched. The preparation method of the 3D flexible glass has a simple structure, can improve the yield in the 3D ultrathin glass production process, has higher impact resistance and mass productivity, and can effectively solve the crease problem of the plastic cover plate.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a preparation method of 3D flexible glass.
Background
Along with the updating of electronic products, glass is widely applied in the electronic industry, the thickness requirement of the market on the glass cover plate protective glass of the touch screen is thinner and thinner, the ultrathin glass cover plate has become one of important development trends of glass, and the ultrathin glass cover plate is focused by more and more market companies in the electronic display industry and is mainly applied to folding mobile phones, folding notebook computers and various wearable electronic devices. Ultra-Thin Glass (UTG) is Glass with the Glass thickness smaller than 100 mu m and flexibility, UTG is widely applied to various electronic industries due to the advantages of high transparency, stability, impact resistance and the like, and the flexible characteristic of the Ultra-Thin Glass is a great milestone for the folding display screen industry, and is an important place in the field of foldable flexible cover plates after being connected with CPI cover plates. With the need for diversification of consumer products, UTG loses a portion of impact strength due to its thinner gauge; therefore, a 3D flexible glass product with thick two sides and thin middle is designed; namely, the thickness of the ultra-thin glass with different thicknesses is reduced compared with that of the traditional flat UTG (ultra-thin flexible glass), the thickness of the middle of the 3D flexible glass is reduced, the thickness is used for relieving local stress concentration when the flexible screen is folded, but the thickness difference exists in the middle, and the impact resistance of a bending area is effectively improved when the bending is ensured.
Since the basic thickness of the ultra-thin glass currently studied is 30-100 μm, UTG loses a part of impact strength due to its thinner plate thickness; therefore, a 3D flexible glass product with thick two sides and thin middle is designed; namely, the thickness of the middle of the 3D flexible glass is reduced compared with that of the traditional flat UTG (ultrathin flexible glass) to relieve local stress concentration when the flexible screen is folded. Meanwhile, the glass is brittle, the thickness of the bending area is thinner, the impact strength of the glass is lower after direct thinning and edge treatment, and the glass does not have flexibility, so that chemical tempering treatment is needed, and the thinner the thickness of the bending area, the better the bending performance of the glass after chemical tempering is, but the lower the impact strength is.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides the 3D flexible glass preparation method which has a simple structure, can improve the yield in the 3D ultrathin glass production process, has higher impact resistance and mass productivity, and can effectively solve the crease problem of a plastic cover plate.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the preparation method of the 3D flexible glass is characterized by comprising the following steps of: thinning a processing groove body, carrying out glass silk screen printing, laser cutting, dispensing, cutting off, CNC (computer numerical control), edge polishing treatment, edge etching, chemical tempering, surface etching and ultrasonic cleaning; then, when the groove body is thinned, a protective film is covered on the outer surface of the whole glass, and the shape of the groove body is reserved on the upper surface of the glass when the protective film is covered; removing the protective film on the upper surface of the glass before the glass screen printing; when glass is silk-screened, dot-shaped or strip-shaped patterns are silk-screened at the bottom of the groove body, the whole surface of the upper surface of the glass except the bottom of the groove body is silk-screened with acid-proof ink, and the part which is not covered with the acid-proof ink is etched.
In order to make the above technical solution more detailed and concrete, the present invention further provides the following preferred technical solutions, so as to obtain a satisfactory practical effect:
the acid-proof ink is removed prior to the laser cutting.
The shape of the groove body is reverse trapezoid, and the width of the bottom of the groove body is more than or equal to 20mm; the depth of the groove body is smaller than the thickness of the ultrathin glass non-bending area; the inclination angle of the inverted trapezoid side edges is 75-89 degrees.
The strip-shaped patterns can be reinforcing rib structures which are uniformly arranged at intervals and extend along the bending length direction.
The groove is etched through acid mixing spraying, a strip-shaped reinforcing rib structure is formed at the position covered by acid-proof printing ink, a plurality of strip-shaped reinforcing rib structures are formed on the bottom surface of the groove body, the interval between adjacent reinforcing ribs is 0.1-0.5 mm, and the depth of the reinforcing ribs is smaller than the thickness of the bending area.
In the edge etching step, the edge of the product is etched by mixed acid, so that the C value of the edge is 20-25 mu m, and the edge breakage is less than 50 mu m.
And a chemical tempering step, namely tempering the mixture in molten potassium nitrate at 390-420 ℃ for 15-25 min.
And the laser cutting is used for cutting the edge of the whole piece of glass, and full-automatic red skin second cutting is adopted.
Cutting off and cutting off the whole glass into required glass sizes by using a cutting machine, wherein each corresponding small glass is provided with a bending area.
The thickness of the bending area of the 3D flexible glass is 30-50 mu m, and the thickness of the non-bending area is 80-150 mu m.
Compared with the prior art, the invention has the following advantages: the preparation method of the 3D flexible glass has a simple structure, can improve the yield in the 3D ultrathin glass production process, has higher impact resistance and mass productivity, can effectively solve the crease problem of the plastic cover plate, and has stronger practicability and better application prospect.
Drawings
The following is a brief description of what is expressed in the drawings of this specification:
FIG. 1 is a schematic diagram of a structure of a whole glass screen printed in the invention;
fig. 2 is a schematic view of the 3D flexible glass production process of the present invention.
Reference numerals: 1. a whole piece of glass; 2. a tank body; 3. reinforcing ribs.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings, which illustrate in further detail.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The invention relates to a preparation method of 3D flexible glass, which is shown in fig. 2 and is a preparation and strengthening process of high-performance ultrathin flexible glass, wherein the main working section of the preparation method comprises the steps of thinning a processing groove body, glass silk screen printing, laser cutting, dispensing, cutting, CNC (computer numerical control), edge polishing treatment, edge etching, chemical tempering, surface etching and ultrasonic cleaning.
The method comprises the steps of processing a thinning groove body on the whole glass 1 according to pattern arrangement, performing glass silk screen printing on the bottom surface of a thinning area, and etching dot-shaped or strip-shaped patterns according to silk screen printing patterns, wherein the density of the dot-shaped or strip-shaped arrangement is related to the thickness difference between the thinning area and a non-thinning area. Designing patterns according to the expansion rate difference between the product thinning area and the non-thinning area due to the non-proportional relation between the thickness difference and the expansion rate, wherein the more the expansion rate difference is, the denser the strip-shaped dot patterns are; conversely, the smaller the thickness difference, the thinner the striped dot pattern. The process adjusts the pattern according to the expansion difference of the product; the design is reasonable, the appearance problem of the product in the conventional tempering process can be effectively optimized, and the impact strength is improved.
After the thinning and silk screen printing steps, laser cutting is carried out, full-automatic red skin second cutting is adopted for laser cutting, edge defects brought by the thinning process can be accurately and effectively cut off, edge breakage of glass edges is effectively controlled to be less than 10 mu m, and the device has various special-shaped capabilities for 3D flexible processing and is not limited by sample properties.
After edge laser cutting, dispensing and stacking the whole glass 1 after the edge cutting treatment, cutting the stacked whole glass 1 into small glass according to a set cutting procedure, wherein each small glass is provided with a bending area after the treatment of the steps. The product is cut off by a cutter to be approximately required finished product size by a cutter wheel, so that the subsequent processing is convenient. And then CNC grinding is carried out by a numerical control machine, edge sweeping treatment is carried out on glass by an edge polishing machine, and the glass edge is etched by mixed acid, so that the value of C at the edge is 20-25 mu m, the edge breakage is less than 50 mu m, and the edge of the product has certain strength and the possibility of bending.
After edge etching, the stacked small glasses are debulked and diced. The slicing is mainly to make the adhesive tape lose viscosity through treatment, and divide the product into small particles; so that the product can be effectively chemically tempered.
The chemical tempering is mainly to exchange sodium and potassium ions at high temperature, and the extrusion effect generated by the volume difference of the sodium and potassium ions is utilized to improve the surface strength and the flexibility of the glass. In the chemical tempering step, the glass is tempered in molten potassium nitrate at 390-420 ℃ for 15-25 min so as to improve the surface strength and flexibility of the glass.
The method is characterized in that the product is subjected to face etching after chemical tempering, the face etching is mainly surface microetching treatment of finished glass after tempering, and the main purpose is to repair defects generated in the process, amplified defects after tempering and the like.
And finally, cleaning and drying the finished product by utilizing ultrasonic cleaning to obtain the finished product.
According to the preparation method of the 3D flexible glass, the whole piece is thinned, etched and silk-screened, so that the production efficiency can be improved, the structural performance of the thinned and etched structure and shape can be improved while bending is met, the toughening apparent problem is optimized, wrinkling is prevented, and the impact strength performance of the toughened glass is improved after the toughening treatment.
Specific:
the thinning processing tank body 2 is usually put into by mixed acid, and the tank body is processed in a thinning area; etching a plurality of thinning groove bodies on the whole glass 1 according to the need, forming bending areas at the corresponding thinning positions, and covering a protective film on the surface of the glass before the groove body is etched, wherein the shape of the groove body is reserved on the upper surface of the glass when the protective film is covered; any acid-proof protective film can be used for the protective film; namely, the bending area on the upper surface of the glass is not covered with an acid-proof protective film, the groove body structure is prepared by spraying mixed acid, and the groove body 2 can be of an inverted trapezoid structure.
The glass thinning is mainly performed in a spray thinning mode, the edge of the glass is clamped, and different thinning angles are designed for the patterns of the product; the angle is 75-89 degrees; calculating the acid etching thickness according to the initial thickness of the product minus the target thickness, and dividing the acid etching thickness by 2 or 4 (even times); and calculating the thickness of the needed two sides (the chamfering is that the product center is symmetrically chamfered up and down), and forming the inverted trapezoid structure in the figure. The structure arrangement can effectively prevent structural defects caused by overlarge thickness difference of the product after the glass is thinned. The main principle of thinning is that hydrofluoric acid reacts with silicon dioxide on the surface of glass to generate fluosilicic acid so as to achieve the effect of thinning the glass.
After the thinning groove body is processed, removing the protective film, and only removing the protective film on the upper surface of the glass; and silk-screen printing is performed on the bottom surface of the thinned groove body. The glass silk screen is mainly used for processing boundary lines of products by reasonably designing the shapes of strip-shaped and dot-shaped matrixes at the joint of a product thinning area and a non-thinning area, and absorbing expansion differences of glass with different thicknesses under the same condition through patterns of the area; solves the problem of wrinkling caused by expansion mismatch in the strengthening process.
Taking a strip structure as an example, as shown in fig. 1, in the case of screen printing, the shape of the reinforcing ribs is screen-printed at the bottom of the tank body 2, and the entire screen printing is performed on the upper surface of the glass other than the bottom of the tank body. The shape of the reinforcing rib 3 is silk-screened at the bottom of the tank body, and the whole surface silk-screen acid-proof ink is performed on the upper surface of the glass except the bottom of the tank body 2; the groove is formed by acid etching at the position which is not covered by acid-proof ink through spraying mixed acid at the bottom of the groove body, the strip-shaped reinforcing rib structure is formed at the position which is covered by acid-proof ink, a plurality of strip-shaped reinforcing rib structures are formed at the bottom surface of the groove body, and the interval between adjacent reinforcing ribs is more than or equal to 0.1mm, preferably 0.1-0.5 mm. The depth of the reinforcing ribs 3 is smaller than the thickness of the bending area.
After the thinning and silk screen printing steps, laser cutting is carried out, full-automatic red skin second cutting is adopted for laser cutting, edge defects brought by the thinning process can be accurately and effectively cut off, edge breakage of glass edges is effectively controlled to be less than 10 mu m, and the device has various special-shaped capabilities for 3D flexible processing and is not limited by sample properties.
Dispensing and stacking, namely dispensing, stacking products by using glue through a dispensing machine, so that subsequent edge treatment is facilitated, and efficient batch production is realized; cutting off the cutter wheel, and cutting the product into a required finished product size by the cutter wheel, so that the subsequent processing is convenient; CNC processes the product through a numerical control machine tool, so that edge breakage of the product caused by cutting is reduced; synchronously loosening the adhesive layer through high-speed grinding; the subsequent edge treatment is convenient, and the good edge shape is obtained, so that the edge of the product has higher strength. The edge treatment is mainly physical edge polishing, and the physical polishing is mainly edge sweeping treatment is carried out on ultrathin flexible glass by an edge polisher, so that four sides of the glass are smooth and burr-free; the edge etching is mainly to treat the edge of a product by mixed acid, so that the edge of the product has certain strength, and the product is soaked in acid liquor in the process, so that the edge of the product can form a bevel under the acid etching of the acid liquor due to the protection in the surface; the edge of the product has higher strength.
Before the tempering step, a slicing treatment step is provided, wherein the slicing is mainly to divide the product into small grains by losing the viscosity of the adhesive tape; so that the product can be chemically tempered.
The chemical tempering is mainly to exchange sodium and potassium ions at high temperature, and the extrusion effect generated by the volume difference of the sodium and potassium ions is utilized to improve the surface strength and flexibility of the glass; tempering: cleaning, and ensuring the surface of a product to be clean; preheating, and preventing the explosion of the product caused by overlarge temperature difference; the product is soaked in the strengthening liquid, so that the surface compressive stress of the product is improved, and the strength of the product is improved.
The surface etching is mainly to carry out surface microetching treatment on the finished glass after tempering, and mainly aims to repair the problems of defects, such as defects generated in the process, amplified defects after tempering and the like, and is a conventional step; a surface etching step: the liquid medicine soaking ensures the cleanness of the product, prevents uneven acid etching of the product caused by foreign matters from influencing the appearance and the performance of the product, and repairs the surface of the product and improves the performance of the product by the acid liquor soaking.
And finally, cleaning and drying the finished product by utilizing ultrasonic cleaning to obtain the finished product.
The present invention will be described in detail with reference to examples.
The composition of the mixed acid used in the examples is: 0.3% of hydrofluoric acid, 50% of sulfuric acid, 0.3% of phosphoric acid, 1.5% of ammonium sulfate, 10% of acetic acid, 6% of nitric acid and the balance of deionized water
The preparation and strengthening processing technology of the high-performance flexible ultrathin glass has the advantages of convenience in operation and short processing period, can realize mass production planning, is relatively high in yield, has relatively high impact resistance for the 3D flexibility of a processed finished product, can meet the requirements of cover plates of electronic products in the current market, and has relatively high use value.
Example 1
The invention discloses a preparation method of 3D flexible ultrathin glass, which comprises the following steps of:
the width of the groove body is designed according to the requirement, and is generally 30-50mm. Covering an acid-proof protective film, and reserving a groove body shape on the upper surface of the glass, namely, not covering the acid-proof protective film in a bending area of the upper surface of the glass, and preparing an inverted trapezoid groove body with a groove depth of 50 mu m, an upper width of 45mm and a bottom width of 35mm by spraying mixed acid; removing the protective film on the upper surface of the glass, silk-screen printing the shape of the reinforcing ribs on the bottom of the groove body, and silk-screen printing acid-proof ink on the whole surface of the glass except the bottom of the groove body; the groove is formed by acid etching at the position which is not covered by acid-proof ink through spraying mixed acid at the bottom of the groove body, the strip-shaped reinforcing rib structure is formed at the position which is covered by acid-proof ink, a plurality of strip-shaped reinforcing rib structures are formed at the bottom surface of the groove body, the interval between adjacent saw teeth is 0.2mm, and the depth of the saw teeth is 20 mu m. After the acid-proof ink is removed, cutting off edges later; stacking the products together through a resin adhesive tape, cutting the products into target sizes through a cutting machine, and CNC grinding the target sizes through a numerical control machine tool; because the grinding head used by CNC is specially designed, the edge of the product can be in a more excellent state through CNC; further strengthening the edge of the product by mixed acid to ensure that the C value of the edge of the product is 20-25 mu m; and the edge breakage is less than 50 mu m; then, the laminated product is subjected to glue removal and slicing; tempering in molten potassium nitrate with the purity of 99.9% at 410 ℃ for 20min; CS can reach 824MPa after tempering; DOL can reach 11.8 mu m; finally, carrying out face etching on the product; CS after etching: 711MPa, DOL: bending R1.5 with the thickness of 10.7 mu m and the pen falling length of 210 mm; the thickness of the analog plate is 50 mu m, the thickness of the ultrathin glass is equal, and the thickness of 140mm is greatly improved after the glass is tempered at 410 ℃ for 20min; the bending R3 of the ultra-thin glass with the thickness of 100 mu m is greatly improved after being tempered for 20 minutes at 410 ℃; and the appearance is not obviously different from that of ultrathin equal-thickness glass.
Example two
The invention discloses a preparation method of 3D flexible ultrathin glass, which comprises the following steps of:
the width of the groove body is designed according to the requirement, and is generally 30-50mm. Covering an acid-proof protective film, and reserving a groove body shape on the upper surface of the glass, namely, not covering the acid-proof protective film in a bending area of the upper surface of the glass, and preparing an inverted trapezoid groove body with a groove depth of 70 mu m, an upper width of 45mm and a bottom width of 35mm by spraying mixed acid; removing the protective film on the upper surface of the glass, silk-screen printing the shape of the reinforcing ribs on the bottom of the groove body, and silk-screen printing acid-proof ink on the whole surface of the glass except the bottom of the groove body; the groove is formed by acid etching at the position which is not covered by acid-proof ink through spraying mixed acid at the bottom of the groove body, the strip-shaped reinforcing rib structure is formed at the position which is covered by acid-proof ink, a plurality of strip-shaped reinforcing rib structures are formed at the bottom surface of the groove body, the interval between adjacent saw teeth is 0.15mm, and the depth of the saw teeth is 15 mu m. After the acid-proof ink is removed, cutting off edges later; stacking the products together through a resin adhesive tape, cutting the products into target sizes through a cutting machine, and CNC grinding the target sizes through a numerical control machine tool; because the grinding head used by CNC is specially designed, the edge of the product can be in a more excellent state through CNC; the edges of the product are further strengthened by mixed acid; the product edge C value of the reel area is 10-20 mu m; and the edge breakage is less than 50 mu m; then, the laminated product is subjected to glue removal and slicing; tempering in molten potassium nitrate with the purity of 99.9% at the temperature of 410 ℃ for 15min; CS can reach 710MPa after tempering; DOL can reach 9.9 mu m; finally, carrying out face etching on the product; CS after etching: 560MPa, DOL:8.8 μm, a non-reel area is dropped with a 210mm reel bend R2; the thickness of the analog plate is 30 mu m, the thickness of the ultra-thin glass is equal, and the thickness of the ultra-thin glass is greatly improved after the pen is dropped for 100mm after 15min at 410 ℃; the ultrathin glass with the thickness of 100 μm and the same thickness cannot be bent by a reel after being tempered for 12min at 410 ℃; and the appearance is not obviously different from that of ultrathin equal-thickness glass.
A3D ultrathin flexible glass preparation process optimizes the groove body processing by silk screen printing of products; the glass is thinned and the glass groove body is treated at the same time; the purpose of solving the toughening fold and not influencing the bending is achieved through the designed strip-shaped or dot-shaped patterns; the strip-shaped and dot-shaped matrix patterns are designed, so that the difference of compressive stress on two sides of the patterns is reduced, and wrinkles are relieved or eliminated through adjustment; the 3D ultrathin glass edge can be processed through edge etching, the edge microcracks after cutting are repaired, the strength of the etched edge is synchronously improved, and the stability of the edge strength of a product is improved through edge polishing.
The preparation and strengthening processing technology of the ultrathin flexible glass effectively optimizes the problem that bending and strength of the planar ultrathin glass cannot be achieved simultaneously when the planar ultrathin glass is applied to a cover plate, is reasonable in technological route, extremely high in yield in the 3D ultrathin glass production process, high in impact resistance and mass productivity of finished glass, capable of effectively solving the crease problem of a plastic cover plate, high in application value, capable of being widely applied to household appliance panels, smart phones, smart watches, tablet computers, wearable smart products, instrument boards and the like, and capable of opening a wide view field for folding screen electronic equipment and providing a new possibility for a flexible screen market.
By designing the shape and the processing flow of the glass, the glass has higher shock resistance while being ensured to be bent; not only can promote intelligent terminal product outward appearance novelty, can bring outstanding touch-control feel again, it accords with 3C product design demand simultaneously, is widely used in various 3C product designs, like folding smart mobile phone, folding tablet computer, wearable intelligent product, instrument board etc. and is favored by vast consumers.
The preparation method of the 3D flexible glass has a simple structure, can improve the yield in the 3D ultrathin glass production process, has higher impact resistance and mass productivity, can effectively solve the crease problem of the plastic cover plate, and has stronger practicability and better application prospect.
The invention has been described above by way of example with reference to the accompanying drawings, but the invention is not limited to the above, as long as various insubstantial modifications by the method concepts and technical solutions of the invention or direct application to other applications are within the scope of the invention.
Claims (10)
1. A method for preparing 3D flexible glass, comprising the steps of:
thinning a processing groove body, carrying out glass silk screen printing, laser cutting, dispensing, cutting off, CNC (computer numerical control), edge polishing treatment, edge etching, chemical tempering, surface etching and ultrasonic cleaning; then, when the groove body is thinned, a protective film is covered on the outer surface of the whole glass, and the shape of the groove body is reserved on the upper surface of the glass when the protective film is covered; removing the protective film on the upper surface of the glass before the glass screen printing; when glass is silk-screened, dot-shaped or strip-shaped patterns are silk-screened at the bottom of the groove body, the whole surface of the upper surface of the glass except the bottom of the groove body is silk-screened with acid-proof ink, and the part which is not covered with the acid-proof ink is etched.
2. The method for preparing 3D flexible glass according to claim 1, wherein: the acid-proof ink is removed prior to the laser cutting.
3. The method for preparing 3D flexible glass according to claim 1, wherein: the shape of the groove body is reverse trapezoid, and the width of the bottom of the groove body is more than or equal to 20mm; the depth of the groove body is smaller than the thickness of the ultrathin glass non-bending area; the inclination angle of the inverted trapezoid side edges is 75-89 degrees.
4. The method for preparing 3D flexible glass according to claim 1, wherein: the strip-shaped patterns can be reinforcing rib structures which are uniformly arranged at intervals and extend along the bending length direction.
5. The method for preparing 3D flexible glass according to claim 4, wherein: the groove is etched through acid mixing spraying, a strip-shaped reinforcing rib structure is formed at the position covered by acid-proof printing ink, a plurality of strip-shaped reinforcing rib structures are formed on the bottom surface of the groove body, the interval between adjacent reinforcing ribs is 0.1-0.5 mm, and the depth of the reinforcing ribs is smaller than the thickness of the bending area.
6. The method for preparing 3D flexible glass according to claim 1, wherein: in the edge etching step, the edge of the product is etched by mixed acid, so that the C value of the edge is 20-25 mu m, and the edge breakage is less than 50 mu m.
7. The method for preparing 3D flexible glass according to claim 1, wherein: and a chemical tempering step, namely tempering the mixture in molten potassium nitrate at 390-420 ℃ for 15-25 min.
8. The method for preparing 3D flexible glass according to claim 1, wherein: and the laser cutting is used for cutting the edge of the whole piece of glass, and full-automatic red skin second cutting is adopted.
9. The method for preparing 3D flexible glass according to claim 1, wherein: cutting off and cutting off the whole glass into required glass sizes by using a cutting machine, wherein each corresponding small glass is provided with a bending area.
10. The method of producing 3D flexible glass according to any one of claims 1 to 9, wherein: the thickness of the bending area of the 3D flexible glass is 30-50 mu m, and the thickness of the non-bending area is 80-150 mu m.
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| CN202311760975.XA CN117819829A (en) | 2023-12-20 | 2023-12-20 | Preparation method of 3D flexible glass |
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| CN202311760975.XA CN117819829A (en) | 2023-12-20 | 2023-12-20 | Preparation method of 3D flexible glass |
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