CN108515756B - Curved surface composite cover plate and preparation method thereof - Google Patents
Curved surface composite cover plate and preparation method thereof Download PDFInfo
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- CN108515756B CN108515756B CN201810306541.5A CN201810306541A CN108515756B CN 108515756 B CN108515756 B CN 108515756B CN 201810306541 A CN201810306541 A CN 201810306541A CN 108515756 B CN108515756 B CN 108515756B
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- B32B17/064—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/02—Tempering or quenching glass products using liquid
- C03B27/03—Tempering or quenching glass products using liquid the liquid being a molten metal or a molten salt
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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
- 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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/206—Organic displays, e.g. OLED
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/208—Touch screens
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
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- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Surface Treatment Of Glass (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a curved surface composite cover plate, which comprises curved surface glass and a plastic cover plate; the preparation method of the curved glass comprises the following steps: obtaining a curved surface clamp, and fixing the glass sheet in the curved surface clamp to keep the glass sheet in the curved surface shape; first tempering: carrying out primary toughening treatment on the glass sheet, and cooling to prepare semi-toughened glass with the toughening depth of 1/10-1/1.5 of the preset toughening depth of the glass sheet; and (3) tempering for the second time: and carrying out secondary toughening treatment on the semi-toughened glass sheet, and cooling to prepare toughened glass with the toughening depth being the preset toughening depth of the glass sheet. The curved surface composite cover plate combines the curved surface glass and the plastic cover plate, and has better shape memory characteristic, more excellent explosion-proof characteristic and better flexibility compared with a single piece of curved surface glass and plastic cover plate.
Description
Technical Field
The invention relates to the field of manufacturing of composite cover plates, in particular to a curved surface composite cover plate and a manufacturing method thereof.
Background
With the development of science and technology, curved glass prevails and has wide market prospect. The existing curved glass is mostly manufactured in a hot-press molding mode, and on one hand, the method has high molding temperature, so that the molding die is fast in oxidation, the material/die can not be recycled, and further the manufacturing cost is high. On the other hand, the glass cover plate after hot pressing deformation has small bending deformation, special equipment and instruments are needed for bonding, the process is complex, the cost is high, the single glass has poor explosion-proof characteristic, and the glass cover plate is not suitable for being applied to occasions with high explosion-proof safety and bending deformation requirements such as vehicles and the like.
The plastic cover plate can be suitable for large-deformation and flexible application occasions, but the surface hardness is low and the plastic cover plate is easy to scratch. In the flexible screen of thin plastic cover plate preparation, the atress of apron, deformation easily pass to the display screen, are unfavorable for the durable use of display screen, and plastic cover plate receives easy deformation fracture under the external force condition, damage display screen.
Disclosure of Invention
In view of the above, there is a need to provide a curved composite cover plate and a method for manufacturing the same, which are low in cost, large in bending deformation, recoverable in deformation, high in surface strength, and not prone to fracture.
The invention provides a curved surface composite cover plate.
The specific technical scheme is as follows:
a curved surface composite cover plate comprises curved surface glass and a plastic cover plate;
the preparation method of the curved glass comprises the following steps:
obtaining a curved surface clamp, and fixing the glass sheet in the curved surface clamp to keep the glass sheet in the curved surface shape;
first tempering: carrying out primary toughening treatment on the glass sheet fixed on the curved surface fixture, and cooling to prepare the semi-toughened glass with the toughening depth of 1/10-1/1.5 of the preset toughening depth of the glass sheet;
and (3) tempering for the second time: performing secondary toughening treatment on the semi-toughened glass sheet fixed on the curved surface fixture, and cooling to prepare toughened glass with the toughening depth being preset toughening depth of the glass sheet;
in one embodiment, the time of the first toughening treatment is 1-3 h.
In one embodiment, the time of the second toughening treatment is 2-5 h.
In one embodiment, the temperature of the first toughening treatment is 380-520 ℃, and the molten salt is potassium nitrate molten solution; and/or
The temperature of the secondary toughening treatment is 380-520 ℃, and the molten salt is potassium nitrate molten liquid.
In one embodiment, the curved surface clamp is made of iron or steel.
In one embodiment, the glass sheet has a thickness of 0.05 to 1.0 mm.
In one embodiment, the plastic cover plate is made of one or more materials selected from PC, PMMA and PET.
In one embodiment, the plastic cover plate has a thickness of 0.02-2.0 mm.
In one embodiment, the optical glue is one or more selected from OCR, OCA and LOCA.
The invention also provides a preparation method of the curved surface composite cover plate.
The specific technical scheme is as follows:
a preparation method of a curved surface composite cover plate comprises the following steps:
adsorbing the plastic cover plate on a first platform, and adsorbing the curved glass on a second platform;
bonding the plastic cover plate and the curved glass on the first platform and the second platform by adopting optical glue to obtain a bonded product;
and placing the attached product in the curved surface fixture for curing and forming to obtain the curved surface composite cover plate.
Compared with the prior art, the invention has the following principle and advantages:
the curved surface composite cover plate combines the plastic cover plate with the curved surface glass, wherein the curved surface glass is manufactured by adopting a specific method, has large bending deformation and has the shape memory characteristic. The plate can be flattened on a plane under the condition of applying an external force, and the original curved surface is recovered after the external force is removed; the curved surface can be continuously bent into a circular shape under the condition of applying external force, and the original curved surface is recovered after the external force is removed. The principle that the curved glass has shape memory characteristics is as follows:
the glass sheet is fixed in the curved surface clamp, so that the glass sheet keeps the curved surface shape. When bending, the stress on the convex and concave surfaces of the glass sheet is different. In this statePerforming first toughening treatment, cooling to obtain concave-convex surface with surface layer stress difference and concave surface extrusion force, and performing second toughening treatment with K+/Na+The ion exchange rate is slow, the convex extrusion force is weakened, and when the secondary toughening treatment is carried out, K is+/Na+The ion exchange rate is very fast, and the tempering time of control second time is greater than first tempering time, accomplishes the tempering of second time, and after the cooling, the tempering degree of depth DOL and the stress CS of convex-concave two sides are different, specifically do: convex surface DOL > concave surface DOL, convex surface CS > concave surface CS. And the glass without the curved surface clamp can be kept to be freely bent based on the stress difference of the convex surface and the concave surface. Further, the time difference of two times of toughening can be adjusted to obtain the curved glass with the required bending radius.
Furthermore, the curved surface composite cover plate combines the curved surface glass with the plastic cover plate, and compared with a single piece of curved surface glass and a single piece of plastic cover plate, the curved surface composite cover plate has better shape memory characteristic, more excellent explosion-proof characteristic and better flexibility, is suitable for manufacturing a flexible display screen protective cover plate, is not easy to deform and break under the condition of external force, is not easy to transmit stress and deformation of the curved surface composite cover plate to a display screen, and is beneficial to durable use of the display screen; the method is also suitable for manufacturing flexible wristwatches or wearable electronic product cover plates.
Furthermore, based on the properties of the curved glass, when the curved composite cover plate is prepared, the curved glass and the plastic cover plate can be respectively adsorbed on the two platforms, the bonding of the curved product is converted into the conventional plane bonding, and the manufacture of the curved composite cover plate is completed. Compared with the curved surface laminating technology in the prior art, the production efficiency can be improved, and a new method which is rapid and easy to produce in mass production is provided for the production of the large-size curved surface composite cover plate.
The curved surface composite cover plate can be decorated by ink by adopting common plane 2D/2.25D glass manufacturing equipment.
The curved surface composite cover plate can be used for laminating equipment and process of a touch Sensor of planar glass and fully laminating equipment and process of the planar glass, and can be fully laminated with the touch Sensor and a display screen (OLED), so that the preparation cost of the curved surface glass is reduced.
Drawings
FIG. 1 is a schematic view of a curved surface fixture according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the stress on both convex and concave sides and the stress direction of semi-tempered glass according to an embodiment of the present invention;
FIG. 3 is a schematic view of ion exchange during two toughening processes according to an embodiment of the present invention;
FIG. 4 is a schematic view of a curved glass deformed by force and restored to the deformed state according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of a curved surface fixture according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating the cured shape, deformation under stress, and deformation recovery of a curved composite cover plate according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a curved composite cover plate and a touch Sensor/OLED plane after being attached to each other according to an embodiment of the invention.
Detailed Description
The curved glass substrate, the method for manufacturing the same, and the application thereof of the present invention will be described in detail with reference to the following embodiments.
Example 1
The embodiment provides curved glass and a preparation method thereof, and the preparation method comprises the following steps:
step 1, obtaining 0.68mm Corning gorilla third-generation glass, cutting the glass into pieces, and cutting the pieces to obtain cut glass.
And then, finely carving and polishing the cut glass to obtain the glass sheet.
And 2, preparing a curve-imitating clamp according to the four-side profile curve of the required curved glass, wherein in the embodiment, the structure of the curve-imitating clamp is shown in figure 1, and the curve-imitating clamp is further provided with vacuum adsorption air holes, so that the glass sheet can be effectively fixed in the curve-imitating clamp. And fixing the glass sheet in the curved surface fixture, keeping the curved surface of the glass sheet in a curved shape under the action of external force, and cleaning. The curved surface clamp is made of low-cost steel, and the preparation cost of the curved surface glass is reduced.
And 3, putting the glass sheet fixed in the curved surface clamp into a chemical molten salt furnace for primary toughening treatment, wherein the toughening conditions are as follows: and (3) the molten salt is a potassium nitrate molten solution, the temperature is 420 ℃, the time is 1h, and the semi-toughened glass with the toughening depth of 1/10-1/1.5 of the preset toughening depth of the glass sheet is prepared by cooling and cleaning. The depth of tempering of the glass sheet is determined by the properties of the glass, and is generally provided by the glass sheet supplier. The tempering depth of the glass sheet is adjusted by adjusting the tempering time.
After the first tempering, stress difference exists on the convex and concave sides of the glass sheet, and the stress direction on the convex and concave sides are shown in figure 2.
And 4, putting the semi-tempered glass sheet fixed in the curved surface clamp into chemical molten salt for secondary tempering treatment, wherein the tempering conditions are as follows: the molten salt is molten potassium nitrate, the temperature is 420 ℃, and the time is 2 h. During the second tempering, the convex extrusion force is weakened by the stress difference of the convex and concave sides, K+/Na+High ion exchange rate, increased concave extrusion force, K+/Na+The ion exchange rate is slow, and the ion exchange condition in the two toughening processes is shown in figure 3. And after the second tempering is finished, cooling and cleaning, wherein at the moment, the convex surface DOL A is larger than the concave surface DOL B, and the convex surface CS is larger than the concave surface CS.
And 5, removing the curved surface clamp to obtain the curved surface glass, wherein the radius of the curved surface is 2700 mm.
The results of testing the left, middle, and right DOL and CS of the curved glass are shown in table 1.
TABLE 1
After the clamp is removed from the curved glass, the shape of the curved surface can be freely kept based on the stress difference of the convex surface and the concave surface. The plate can be flattened on a plane under the condition of applying an external force, and the original curved surface is recovered after the external force is removed; the curved surface can be continuously bent into a circular shape under the condition of applying external force, and the original curved surface is restored after the external force is removed, as shown in fig. 4.
Example 2
The embodiment provides curved glass and a preparation method thereof, and the preparation method comprises the following steps:
step 1, obtaining 0.68mm Corning gorilla third-generation glass, cutting the glass into pieces, and cutting the pieces to obtain cut glass.
And then, finely carving and polishing the cut glass to obtain the glass sheet.
And 2, clamping and fixing the glass sheet by using a curved surface clamp shown in figure 1, keeping the curved surface of the glass sheet in a curved shape under the action of external force, and cleaning. The curved surface clamp is made of iron.
And 3, putting the glass sheet fixed in the curved surface clamp into a chemical molten salt furnace for primary toughening treatment, wherein the toughening conditions are as follows: the molten salt is molten potassium nitrate, the temperature is 420 ℃, the time is 1.5h, and cooling and cleaning are carried out. Preparing the semi-toughened glass with the toughening depth of 1/10-1/1.5 of the preset toughening depth of the glass sheet.
And 4, putting the semi-tempered glass sheet fixed in the curved surface clamp into chemical molten salt for secondary tempering treatment, wherein the tempering conditions are as follows: the molten salt is molten potassium nitrate, the temperature is 420 ℃, the time is 1.5h, and cooling and cleaning are carried out.
And 5, removing the curved surface clamp to obtain the curved surface glass, wherein the radius of the curved surface is 2160 mm.
The results of testing the left, middle, and right DOL and CS of the curved glass are shown in table 2.
TABLE 2
After the curved surface glass curved surface clamp is used, the curved surface appearance can be freely kept based on the stress difference of the convex surface and the concave surface. The plate can be flattened on a plane under the condition of applying an external force, and the original curved surface is recovered after the external force is removed; the curved surface can be continuously bent into a circular shape under the condition of applying external force, and the original curved surface is recovered after the external force is removed.
Example 3
The embodiment provides curved glass and a preparation method thereof, and the preparation method comprises the following steps:
step 1, obtaining 0.33mm south glass white glass, cutting the south glass white glass into required sizes, and obtaining cut glass.
And then, finely carving and polishing the cut glass to obtain the glass sheet.
And 2, preparing the curved surface fixture shown in the figure 5, wherein the curved surface fixture is a rectangular frame, and the inner side wall of the frame is provided with a wedge-shaped clamping part for clamping the edges of the four edges of the glass sheet, so that the glass sheet keeps the curved shape of the curved surface under external force and is cleaned. The curved surface clamp is made of iron and is low in cost.
And 3, putting the glass sheet fixed in the curved surface clamp into a chemical molten salt furnace for primary toughening treatment, wherein the toughening conditions are as follows: the molten salt is molten potassium nitrate, the temperature is 420 ℃, the time is 1.5h, and cooling and cleaning are carried out. Preparing the semi-toughened glass with the toughening depth of 1/10-1/1.5 of the preset toughening depth of the glass sheet.
And 4, putting the semi-tempered glass sheet fixed in the curved surface clamp into chemical molten salt for secondary tempering treatment, wherein the tempering conditions are as follows: the molten salt is molten potassium nitrate, the temperature is 420 ℃, the time is 1.5h, and cooling and cleaning are carried out.
And 5, removing the curved surface clamp to obtain the curved surface glass, wherein the radius of the curved surface is 1846 mm.
The results of testing the left, middle, and right DOL and CS of the curved glass are shown in table 3.
TABLE 3
After the curved surface clamp is removed from the curved surface glass, the shape of the curved surface can be freely kept based on the stress difference of the convex surface and the concave surface. The plate can be flattened on a plane under the condition of applying an external force, and the original curved surface is recovered after the external force is removed; the curved surface can be continuously bent into a circular shape under the condition of applying external force, and the original curved surface is recovered after the external force is removed.
Example 4
This embodiment provides a compound apron of curved surface, includes following step:
step 1, obtaining a pre-bent PC/PMMA plastic cover plate with the thickness of 0.5mm, wherein the cover plate can keep a plane under the action of external force, and recovering a curved surface after the external force is removed.
And 2, flatly pressing and adsorbing the plastic cover plate on a platform, and flatly pressing and adsorbing the curved glass of the embodiment 1 on another platform. By adopting 2D/2.25D glass manufacturing equipment, optical cement OCR/OCA (the thickness of a glue layer is 0.1mm) is used for pre-curing and bonding the plastic cover plate and the curved glass together through the optical cement.
And 3, putting the attached product into a vacuum adsorption clamp with a curved surface shape (shown in figure 1), and finally curing and shaping to obtain the curved surface composite cover plate.
The curved surface composite cover plate can be deformed to a plane or a circle by an external force like a single sheet under the action of the external force, and the curved surface can be freely recovered after the external force is removed, as shown in fig. 6.
Example 5
This embodiment provides a compound apron of curved surface, includes following step:
step 1, obtaining a planar PET plastic cover plate with the thickness of 0.175mm, wherein the cover plate can be bent under the action of external force, and the plane is recovered after the external force is removed.
And 2, adsorbing the plastic cover plate on a platform, and flatly pressing and adsorbing the curved glass of the embodiment 2 on another platform. And (3) adopting 2D/2.25D glass manufacturing equipment, using optical glue OCR/OCA (glue layer thickness of 0.1mm), precuring and bonding the plastic cover plate and the curved glass together through the optical glue, and curing and shaping to obtain the curved composite cover plate.
The curved surface composite cover plate is bent under the action of external force, the radius of the curved surface is further reduced, the curved surface composite cover plate can also be bent to form a circle, and the external force can be restored after being removed; the flat state is achieved under the action of external force, and after the external force is removed, the deformation can be restored.
The curved surface composite cover plate prepared by the preparation method inherits the shape memory characteristic of curved surface glass, and further optimizes the shape memory characteristic of the curved surface composite cover plate by combining with the plastic cover plate. Meanwhile, compared with a single plastic cover plate, the surface of the curved surface composite cover plate compounded with the curved surface glass has high hardness, good toughness and explosion resistance, and is suitable for manufacturing a protective cover plate of a flexible display screen; the curved surface composite cover plate is also suitable for manufacturing a flexible wristwatch or a wearable electronic product cover plate.
The curved surface composite cover plate can be decorated by ink by adopting common plane 2D/2.25D glass manufacturing equipment.
The curved surface composite cover plate can be used for laminating equipment and process of a touch Sensor of planar glass and fully laminating equipment and process of the planar glass, and can be fully laminated with the touch Sensor and a display screen (OLED), so that the preparation cost of the curved surface glass is reduced. The bonded product is shown in fig. 7, the plastic cover plate is one or more selected from planar or pre-bent PC, PMMA and PET materials, the plastic cover plate is an optical grade material for the organic cover plate, and the plastic cover plate can be preformed according to the required shape.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The curved surface composite cover plate is characterized by comprising curved surface glass and a plastic cover plate;
the preparation method of the curved glass comprises the following steps:
obtaining a curved surface clamp, and fixing the glass sheet in the curved surface clamp to keep the glass sheet in the curved surface shape;
first tempering: carrying out primary toughening treatment on the glass sheet fixed on the curved surface fixture, and cooling to prepare the semi-toughened glass with the toughening depth of 1/10-1/1.5 of the preset toughening depth of the glass sheet;
and (3) tempering for the second time: performing secondary toughening treatment on the semi-toughened glass sheet fixed on the curved surface fixture, and cooling to prepare toughened glass with the toughening depth being preset toughening depth of the glass sheet;
the time of the first toughening treatment is 1-3 h;
the time of the second toughening treatment is 2-5h
The preparation method of the curved surface composite cover plate comprises the following steps:
adsorbing the plastic cover plate on a first platform, and adsorbing the curved glass on a second platform;
bonding the plastic cover plate and the curved glass on the first platform and the second platform by adopting optical glue to obtain a bonded product;
and placing the attached product in the curved surface fixture for curing and forming to obtain the curved surface composite cover plate.
2. The curved composite decking of claim 1, wherein the first tempering treatment is for a period of 1 hour.
3. The curved composite decking of claim 1, wherein the second tempering treatment is for a period of 2 hours.
4. The curved composite cover plate as claimed in any one of claims 1 to 3, wherein the temperature of the first toughening treatment is 380-520 ℃, and the molten salt is potassium nitrate melt; and/or
The temperature of the secondary toughening treatment is 380-520 ℃, and the molten salt is potassium nitrate molten liquid.
5. The curved composite decking of any one of claims 1 to 3 wherein the curved fixture is made of iron or steel.
6. The curved composite cover plate according to any one of claims 1 to 3, wherein the glass sheet has a thickness of 0.05 to 1.0 mm.
7. The curved composite decking of any one of claims 1 to 3, wherein the material of the plastics decking is selected from one or more of PC, PMMA and PET.
8. The curved composite cover plate according to any one of claims 1 to 3, wherein the thickness of the plastic cover plate is 0.02 to 2.0 mm.
9. The curved composite decking of any one of claims 1 to 3, wherein the optical glue is selected from one or more of OCR, OCA and LOCA.
10. A method of making the curved composite decking defined in any one of claims 1 to 9 including the steps of:
adsorbing the plastic cover plate on a first platform, and adsorbing the curved glass on a second platform;
bonding the plastic cover plate and the curved glass on the first platform and the second platform by adopting optical glue to obtain a bonded product;
and placing the attached product in the curved surface fixture for curing and forming to obtain the curved surface composite cover plate.
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| CN206932515U (en) * | 2017-04-10 | 2018-01-26 | 信利光电股份有限公司 | A kind of 3D cover plates |
| CN108116029A (en) * | 2017-12-20 | 2018-06-05 | 江苏冠达通电子科技有限公司 | A kind of bend glass screen laminating apparatus and applying method |
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