CN110871612B - Laminated glass and preparation method and application thereof - Google Patents
Laminated glass and preparation method and application thereof Download PDFInfo
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- CN110871612B CN110871612B CN201811002680.5A CN201811002680A CN110871612B CN 110871612 B CN110871612 B CN 110871612B CN 201811002680 A CN201811002680 A CN 201811002680A CN 110871612 B CN110871612 B CN 110871612B
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- organic film
- laminated glass
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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
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10293—Edge features, e.g. inserts or holes
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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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
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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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
Abstract
The invention provides laminated glass and a preparation method and application thereof, wherein the laminated glass comprises at least two glass pieces and at least one organic film, the organic film is arranged between every two adjacent glass pieces, the thickness of each glass piece is 0.1-0.5 mm, and the thickness of the organic film is 25-100 micrometers. Therefore, the thickness of the glass piece and the organic film in the laminated glass is proper, the laminated glass is attractive in appearance, good in optical performance, excellent in mechanical performance, good in anti-falling performance, free of glass splashing during crushing, good in safety, capable of being used for a shell of electronic equipment and capable of being effectively applied to the field of actual production.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to laminated glass and a preparation method and application thereof.
Background
At present, laminated glass is widely applied to the fields of buildings and automobiles, and has not yet been practically applied to electronic equipment, and researchers propose that the laminated glass is applied to the shell of the electronic equipment, but the thickness of the laminated glass is far larger than that of the glass shell on the market, and serious bubble problems exist, so that the technology cannot be applied to the field of practical production. Thus, the related research of the existing laminated glass still needs to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a method for preparing laminated glass, the laminated glass prepared by the method is thin in thickness, free of bubbles, small in flatness and profile degree or good in decorative effect and attractive in appearance, and the laminated glass, an electronic device shell and an electronic device are also provided.
In one aspect of the invention, the invention provides a laminated glass. According to the embodiment of the invention, the laminated glass comprises at least two glass pieces and at least one organic film, wherein the organic film is arranged between every two adjacent glass pieces, the thickness of each glass piece is 0.1-0.5 mm, and the thickness of the organic film is 25-100 micrometers. Therefore, the thickness of the glass piece and the organic film in the laminated glass is proper, the laminated glass is attractive in appearance, good in optical performance, excellent in mechanical performance, good in anti-falling performance, free of glass splashing during crushing, good in safety, capable of being used for a shell of electronic equipment and capable of being effectively applied to the field of actual production.
In another aspect of the invention, an electronic device housing is provided. According to an embodiment of the invention, the electronic device housing comprises the laminated glass described above. The electronic device housing has all the features and advantages of the laminated glass, and will not be described in detail herein.
In another aspect of the invention, a touch screen or display screen is provided. According to the embodiment of the invention, the substrate in the touch screen or the display screen is made of the laminated glass. Therefore, the touch screen or the display screen has the advantages of good optical performance, excellent touch or display effect, excellent mechanical performance, good drop resistance, good safety and long service life.
In another aspect of the invention, an electronic device is provided. According to an embodiment of the present invention, the electronic device includes the electronic device housing described above or the touch screen or the display screen described above. The electronic device has all the features and advantages of the electronic device shell, the touch screen or the display screen, which are not described in detail herein.
In yet another aspect of the present invention, a method of making a laminated glass is provided. According to an embodiment of the invention, the method comprises: laminating at least two glass pieces and at least one organic film, and performing positioning treatment to obtain a laminated structural member, wherein the organic film is arranged between two adjacent glass pieces; carrying out first vacuum-pumping treatment on the laminated structural member at room temperature; carrying out second vacuumizing treatment on the laminated structural member subjected to the first vacuumizing treatment under the heating condition; and pressurizing and heating the laminated structural member subjected to the second vacuum-pumping treatment to obtain the laminated glass. In the method, through the first vacuum-pumping and the second vacuum-pumping treatment under heating at room temperature, bubbles between the glass piece and the organic film can be fully removed, the bubble problem of the laminated glass is effectively improved, the laminated structural member is further subjected to pressure treatment, the bubbles between the glass piece and the organic film can be driven away by using high pressure, the bubble problem is further improved, the obtained laminated glass is amplified by 25 times and is observed to have no bubbles, and the optical performance and the mechanical performance are both obviously improved; in addition, an organic film is arranged between adjacent glass pieces, the organic film can buffer mismatching of flatness, profile degree and the like between the two glass pieces, the glass pieces and the organic film can be tightly attached through two times of vacuum pumping treatment and pressurization treatment, the laminated glass with smaller flatness and profile degree is obtained, and the defects of low glass strength and poor falling performance can be greatly improved through the organic film; moreover, the ultrathin laminated glass can be prepared and obtained by the method, can be applied to electronic equipment shells, touch screens or display screens, meets the requirement of lightening and thinning of electronic equipment, can be decorated through the organic film, and is closer to a user in the decoration layer, better in color saturation and color and attractive in appearance.
Drawings
Fig. 1 is a schematic flow diagram of a method of making a laminated glass according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a laminated structural member according to an embodiment of the present invention.
Figure 3 is a schematic structural view of a laminated structure according to an embodiment of the invention.
Figure 4 is a schematic structural view of a laminated structure according to an embodiment of the invention.
Figure 5 is a schematic structural view of a laminated structure according to an embodiment of the invention.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
In another aspect of the present invention, the present invention provides a laminated glass. According to an embodiment of the present invention, referring to fig. 1, the laminated glass 10 includes at least two glass pieces (1, 2) and at least one organic film 3, wherein the organic film 3 is disposed between two adjacent glass pieces 1 and 2, the glass pieces have a thickness of 0.1 to 0.5mm, and the organic film has a thickness of 25 to 100 μm. Therefore, the thickness of the glass piece and the organic film in the laminated glass is proper, the organic film and the glass piece are basically free of bubbles in the preparation process, the laminated glass is attractive in appearance and good in optical performance, the laminated glass is also guaranteed to have excellent mechanical performance, particularly good anti-falling performance, the glass cannot splash when being broken, the safety is good, the laminated glass can be used for a shell of electronic equipment, and the laminated glass can be effectively applied to actual production. If the thickness of the glass piece is too thick, the laminated glass is thick, the appearance is not attractive, and the laminated glass is not suitable for being applied to a shell of electronic equipment, a touch screen or a display screen; if the thickness of the organic film is too thick, the problem of glue overflow can occur in the preparation process, the appearance and the smoothness of the laminated glass are influenced, and the bubble removal is not facilitated.
The specific composition of the glass member is not critical and can be flexibly selected by those skilled in the art as desired according to embodiments of the present invention, including, but not limited to, cover glass (including alumino-silicate glass and soda-lime-silica glass, etc.), touch screen substrate glass (such as alkaline earth sodium pyroborate-aluminosilicate glass, sodium glass, and neutral borosilicate glass, etc., which do not contain alkali and heavy metals (arsenic, antimony, barium)), display screen substrate glass (such as alkaline earth sodium pyroborate-aluminosilicate glass, sodium glass, and neutral borosilicate glass, etc., which do not contain alkali and heavy metals (arsenic, antimony, barium)), and TFT display screen substrate glass (including but not limited to corning Eagle XG, Eagle XG Silm, Willow, etc., alkaline earth sodium pyroborate-aluminosilicate glass brand glass, which do not contain alkali and heavy metals (arsenic, antimony, barium)), and the like. In some embodiments of the present invention, in order to meet the use requirements for mechanical properties such as strength, the glass member may be subjected to a strengthening treatment, such as chemical strengthening, so that the strength of the glass member can be significantly improved and better use properties can be obtained.
According to an embodiment of the present invention, the thickness of the plurality of glass pieces used may be, independently, 0.1mm to 0.5mm, such as 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc. In some embodiments, the thicknesses of all the glass pieces used may be equal, and in other embodiments, the thicknesses of all the glass pieces used may be different, and the specific thicknesses may be flexibly selected according to actual needs. For example, the laminated structure may be formed using at least two glass pieces having the same thickness (e.g., each of 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm), or may be formed using glass pieces having different thicknesses (e.g., one glass piece having a thickness of 0.25mm and one glass piece having a thickness of 0.45 mm). Therefore, the use requirements under different conditions can be met, the glass pieces in the thickness range are matched with each other, and the mechanical property, the appearance and the optical property of the laminated glass are better than those of the glass pieces in other thickness ranges.
The specific number of glass pieces in the laminated glass according to the embodiment of the present invention is also not limited, and may be two, three, four, five or more, etc., and one organic film is disposed between any two adjacent glass pieces. In some embodiments of the present invention, in order to better satisfy the application of the electronic device housing, the display screen, or the touch screen, the number of the glass pieces may be 2 or 3, so that the laminated glass has good usability, and simultaneously, the laminated glass conforms to the development trend of light and thin, which is beneficial to improving the market competitiveness and the user experience of a product using the laminated glass.
The specific shape and configuration of the glass pieces according to embodiments of the present invention is not a limitation and may include, but is not limited to, sheet glass pieces, 2.5D glass pieces, 3D glass pieces, and other glass pieces of complex configuration and shape, and the like. The at least two glass members in each laminated structure may be the same in shape and structure, or may be different in shape, for example, at least two sheet glass members having different shapes may be used to form the laminated structure, or at least one sheet glass member and at least one 2.5D glass member may be used to form the laminated structure. In some embodiments of the present invention, in order to obtain better use effect, at least two glass pieces and the organic film are matched in position and shape, for example, when a flat glass piece and a 2.5D glass piece are used to form a laminated structural member, a plane surface of the flat glass piece is laminated by the organic film and a plane surface of the 2.5D glass piece (see fig. 2 for a structural schematic diagram). In some embodiments of the present invention, all of the glass pieces may be identical in shape and structure, and thus may be well fitted and closely bonded to obtain laminated glass with substantially no bubbles, low profile and flatness, and good performance. Specifically, in some embodiments of the present invention, the glass members are both flat glass (see fig. 1 for a schematic structural diagram), in other embodiments, the glass members are both 2.5D glass (see fig. 3 for a schematic structural diagram), in still other embodiments, the glass members are both 3D glass (see fig. 4 for a schematic structural diagram), and in still other embodiments, one glass member is a flat glass member and one glass member is 2.5D glass (see fig. 2 for a schematic structural diagram). To the glass spare of above-mentioned not isostructure, organic membrane can be the plane rete, also can be for the rete unanimous with glass spare structure and shape, because organic membrane has better processing nature, the cooperation problem between two adjacent glass spares of buffering that can be fine for the three closely combines, and organic membrane can improve the intensity and the anti falling performance of glass spare greatly simultaneously, and can not take place glass and splash when the breakage, and the security is better.
According to an embodiment of the present invention, in order to obtain better optical and mechanical properties, the organic film may include at least one of polyvinyl butyral (PVB), ethylene-methacrylate copolymer, ionic film (SGP, such as an ionic film that may contain about 1% sodium ions), ethylene-vinyl acetate copolymer (EVA) film, thermoplastic polyurethane elastomer rubber (TPU), and Propylene Oxide (PO). Therefore, the organic film has better adhesive force and transmittance, and the obtained laminated glass has better strength and drop resistance. According to an embodiment of the present invention, the thickness of the organic film may be 25 micrometers to 100 micrometers, such as 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, 50 micrometers, 55 micrometers, 60 micrometers, 65 micrometers, 70 micrometers, 75 micrometers, 80 micrometers, 85 micrometers, 90 micrometers, 95 micrometers, 100 micrometers, and the like. Therefore, the mechanical properties such as better optical property, strength and anti-falling property can be ensured, the problem of mismatching between two adjacent glass pieces can be better buffered, the thickness is thinner, and the use requirement of the shell of the electronic equipment can be met. When the laminated glass has a plurality of organic films, the thicknesses of the plurality of organic films may be the same or different, and may be specifically selected according to the use requirements.
According to an embodiment of the present invention, when the laminated glass is used for a housing of an electronic device, the organic film may have at least one of a predetermined color and a predetermined pattern in order to improve an appearance and a decorative effect of the laminated glass. For example, the organic film may be set to a single color such as red, black, white, blue, silver, or the like, different regions of the organic film may be set to different colors, the organic film may be set to a gradation color of two or more colors, or the like, and further, different decorative patterns such as identification information, a texture pattern, a decorative pattern (a geometric pattern, a random pattern, an animal pattern, a landscape pattern, or the like) may be set on the organic film. Therefore, the decoration color or the decoration pattern is close to the user, the color saturation and the color are better, and the appearance is attractive.
According to an embodiment of the present invention, the laminated glass satisfies at least one of the following conditions: magnifying by 25 times with a magnifying glass to observe that no bubbles exist; a transmittance of 92% or more; no glass splash is generated during crushing; when the glass piece on the uppermost layer in the laminated glass is subjected to a crushing acting force, the glass piece on the lowermost layer in the laminated glass is crushed, and the glass piece on the uppermost layer is not crushed; the bending strength is more than 500 MPa; the flatness is 0.01-0.03 mm; the profile tolerance is 0.03-0.05 mm. Therefore, the laminated glass has good appearance, optical performance, anti-falling performance, safety and mechanical performance, and can be effectively used in electronic equipment shells, touch screens and display screens.
In another aspect of the invention, an electronic device housing is provided. According to an embodiment of the invention, the electronic device housing comprises the laminated glass described above. The electronic equipment shell is amplified by 25 times and is observed to be free of bubbles, the electronic equipment shell has attractive appearance effect and optical performance (such as transmittance), and meanwhile has good strength, falling resistance and explosion-proof performance.
The specific structure, shape and size of the electronic device housing according to the embodiment of the present invention are not limited, and may be the structure, shape and size of a conventional electronic device housing, which may be selected by those skilled in the art as needed. And the electronic device casing may be made of only a part of the laminated glass described above, or may be made of the laminated glass described above entirely.
In another aspect of the invention, a touch screen or display screen is provided. According to the embodiment of the invention, the substrate in the touch screen or the display screen is made of the laminated glass. Therefore, the touch screen or the display screen has the advantages of good optical performance, excellent touch or display effect, excellent mechanical performance, good drop resistance, good safety and long service life. Specifically, the front laminated glass can be a glass piece of a touch screen or a display screen, so that the touch screen or the display screen is endowed with excellent mechanical property, optical property and safety performance.
In another aspect of the invention, an electronic device is provided. According to an embodiment of the present invention, the electronic device includes the electronic device housing described above or the touch screen or the display screen described above. The electronic device has all the features and advantages of the electronic device shell or the touch screen or the display screen, and redundant description is omitted here.
According to the embodiment of the present invention, the specific kind of the electronic device is not particularly limited, and may be adjusted as needed by those skilled in the art. For example, including but not limited to cell phones, tablets, game consoles, televisions, wearable devices, consumer electronics, and the like. Of course, it can be understood by those skilled in the art that the electronic device includes, besides the electronic device housing, the structures and components necessary for the conventional electronic device, for example, a mobile phone, and may further include, besides at least one of the electronic device housing, the touch screen and the display screen, the necessary structures and components necessary for the conventional mobile phone, such as a CPU, a camera module, a fingerprint identification module, a sound processing system, and necessary circuit structures.
In one aspect of the invention, a method of making a laminated glass is provided. According to an embodiment of the invention, referring to fig. 5, the method comprises the steps of:
s100: at least two glass pieces (1, 2) and at least one organic film 3 are stacked and positioned to obtain a stacked structural member 10 (see fig. 2 for a structural schematic diagram), wherein the organic film 3 is disposed between two adjacent glass pieces 1 and 2.
The glass member and the organic film involved in this step are consistent with the foregoing description according to an embodiment of the present invention, and are not described in detail herein.
The method for producing the glass member according to the embodiment of the present invention is not particularly limited, and those skilled in the art can flexibly select the method as needed. Specifically, in some embodiments of the present invention, the glass sheet may be cut, machined by a numerical control machine, polished, edge-swept or chemically strengthened in sequence to obtain a flat glass member, and for a 2.5 or 3D glass member, a hot bending process may be added before the above polishing process. Therefore, the glass piece with the preset shape and size can be conveniently and quickly obtained, the process is mature, and the industrial production is easy to realize.
According to the embodiment of the invention, the glass piece and the organic film are arranged in a laminated manner, and the laminating operation can be manual operation or automatic equipment operation. In order to obtain laminated glass with higher service performance and higher accuracy, the glass piece and the organic film are arranged in a laminated mode and need to be positioned, so that the glass piece and the organic film are accurately aligned, the matching degree is better, various defects and faults in the machining process are effectively avoided, and the service performance of the obtained laminated glass is improved. In some embodiments of the present invention, the positioning process is performed by a positioning jig or a CCD image sensor. Specifically, the glass piece and the organic film can be alternately placed in the positioning jig in sequence, and the glass piece and the organic film can also be sequentially stacked together through the CCD image sensor with high precision. Therefore, the precise alignment fit of the glass piece and the organic film can be ensured, the improvement of the degree of fit between the glass piece and the organic film is facilitated, and the use performances such as appearance, optical performance and mechanical performance of the obtained laminated glass are further improved.
S200: and carrying out first vacuum-pumping treatment on the laminated structural member at room temperature.
According to an embodiment of the present invention, the step of placing the laminated structure in a vacuum bag or a vacuum chamber for vacuum treatment may be performed, wherein the vacuum bag or the vacuum chamber is not particularly limited, and may be any vacuum bag or vacuum chamber known in the art, such as PET/AL/CPE or PET/NY/AL/CPE vacuum bag. According to the embodiment of the invention, in order to ensure accurate alignment between the organic film and the glass member, the positioning jig and the lamination structural member may be placed in a vacuum bag or a vacuum chamber.
According to an embodiment of the present invention, the first vacuuming treatment is performed at room temperature for 30 to 60 minutes, such as 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, 60 minutes, and the like. Therefore, most of gas in the vacuum bag can be exhausted, and bubbles of the obtained laminated glass can be reduced. In addition, in the time range, the gas can be effectively exhausted, and the time waste and the cost increase caused by overlong time are avoided.
It should be noted that the description mode "room temperature" used herein refers to 20 to 40 degrees celsius, and may be, for example, 20 degrees celsius, 21 degrees celsius, 22 degrees celsius, 23 degrees celsius, 24 degrees celsius, 25 degrees celsius, 26 degrees celsius, 27 degrees celsius, 28 degrees celsius, 29 degrees celsius, 30 degrees celsius, 35 degrees celsius, 40 degrees celsius, and the like.
S300: and carrying out second vacuum-pumping treatment on the vacuum bag subjected to the first vacuum-pumping treatment under the heating condition.
According to an embodiment of the present invention, in this step, the vacuum bag may be placed in an oven to be heated, and the specific heating temperature may be 90 to 150 degrees celsius, such as 90 degrees celsius, 95 degrees celsius, 100 degrees celsius, 105 degrees celsius, 110 degrees celsius, 115 degrees celsius, 120 degrees celsius, 125 degrees celsius, 130 degrees celsius, 135 degrees celsius, 140 degrees celsius, 145 degrees celsius, 150 degrees celsius, and the like. Thus, residual gas in the vacuum bag can be further removed, so that the obtained laminated glass is basically free of bubbles and has better appearance and optical performance. In the temperature range, the effective discharge of gas can be ensured, the performance of the glass piece and the organic film can not be influenced, and meanwhile, the glass piece and the organic film can be preliminarily combined together, so that the operation of subsequent steps is facilitated. According to an embodiment of the invention, the heating in this step may be multi-stage heating to better remove bubbles while ensuring the properties of the laminated glass.
According to an embodiment of the present invention, the time of the second vacuuming treatment may be 30 to 60 minutes, such as 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, 60 minutes, and the like. Therefore, residual gas in the vacuum bag can be removed, and bubbles of the obtained laminated glass can be reduced. In addition, within the time range, the gas exhaust effect is better, and the processing time and the energy consumption are not increased due to overlong time.
S400: and pressurizing and heating the laminated structural member subjected to the second vacuum-pumping treatment to obtain the laminated glass.
According to an embodiment of the invention, in this step, the laminated structural member subjected to the second vacuuming treatment and preliminarily bonded together is taken out, and then the laminated structural member is subjected to a pressing and heating treatment. Therefore, the glass piece and the organic film can be firmly combined together, and the air bubbles in the laminated structural member can be further driven away by pressurization treatment, so that the obtained laminated glass is basically free of air bubbles, the glass piece and the organic film are tightly combined, and the laminated glass has better optical performance and mechanical performance. Specifically, the step of applying pressure and heat to the laminated structural member may include: heating the laminated structure to 90-130 degrees centigrade (e.g., 90 degrees centigrade, 95 degrees centigrade, 100 degrees centigrade, 105 degrees centigrade, 110 degrees centigrade, 115 degrees centigrade, 120 degrees centigrade, 125 degrees centigrade or 130 degrees centigrade), pressurizing to 0.5-0.7MPa (e.g., 0.5MPa, 0.55MPa, 0.6MPa, 0.65MPa or 0.7MPa), and holding for 20-30 minutes (e.g., 20 minutes, 21 minutes, 22 minutes, 23 minutes, 24 minutes, 25 minutes, 26 minutes, 27 minutes, 28 minutes, 29 minutes or 30 minutes); the laminated structure is then heated to 180 degrees Celsius (e.g., 130 degrees Celsius, 135 degrees Celsius, 140 degrees Celsius, 145 degrees Celsius, 150 degrees Celsius, 155 degrees Celsius, 160 degrees Celsius, 165 degrees Celsius, 170 degrees Celsius, 175 degrees Celsius, or 180 degrees Celsius), pressurized to 1.2 to 1.5MPa (e.g., 1.2MPa, 1.25MPa, 1.3MPa, 1.35MPa, 1.4MPa, 1.45MPa, or 1.5MPa), and held for 30 to 60 minutes (e.g., 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, or 60 minutes). Therefore, adjacent glass pieces can be firmly combined together through the organic film, and meanwhile, air bubbles in the laminated structural member can be effectively removed, so that the obtained laminated glass has good optical performance and mechanical performance.
According to the method, through the processes of room-temperature vacuum pumping and heating vacuum pumping, and by combining proper glass piece thickness and organic film thickness, bubbles between the glass piece and the organic film can be fully eliminated, the bubble problem of the laminated glass is effectively improved, the laminated structural member is further subjected to pressure treatment, the bubbles between the glass piece and the organic film can be driven away by utilizing high pressure, the bubble problem is further improved, the obtained laminated glass is basically free of bubbles, and the optical performance and the mechanical performance are both obviously improved; meanwhile, an organic film is arranged between the glass pieces, the organic film can buffer the mismatching of the flatness and the profile degree between two adjacent glass pieces, the glass pieces and the organic film can be attached more tightly through two times of vacuum pumping treatment and pressurization treatment, the laminated glass with smaller flatness and profile degree is obtained, and the defects of low glass strength and poor dropping performance can be greatly improved through the organic film; in addition, the ultrathin laminated glass can be prepared and obtained by the method, can be applied to electronic equipment shells, touch screens or display screens, meets the requirement of lightening and thinning of electronic equipment, can be decorated through the organic layer, and is closer to a user in the decoration layer, better in color saturation and color and attractive in appearance.
According to the embodiment of the invention, the laminated glass prepared by the method provided by the invention is subjected to drop, boiling, bending resistance and drop performance tests, so that good effects are achieved, the performance of the laminated glass is greatly improved compared with that of single-layer glass with the same thickness and laminated glass with other thicknesses, and when the laminated glass is cut and broken, glass fragments are firmly bonded together through an organic film, so that a good explosion-proof effect is achieved, and the safety performance of the product is greatly improved.
In the following, examples of the present invention will be described in detail, and in the following examples and comparative examples, a glass member not specifically described is a cover glass.
Example 1
In this embodiment, two 3D glass pieces (an inner glass piece and an outer glass piece, a schematic cross-sectional structure diagram can refer to fig. 4) with a thickness of 0.25mm and four-side bending are adopted, and a PVB film with a thickness of 0.075mm is used for performing a double-layer 3D composite process.
The manufacturing process comprises the following steps: firstly, respectively carrying out processes of slicing, CNC (numerical control machine) machining, hot bending, polishing, edge sweeping, chemical strengthening and the like on inner glass and outer glass with the thickness of 0.25mm to machine an inner glass piece and an outer glass piece with a 3D structure; secondly, the outer glass piece is placed into a positioning jig, then a PVB film cut by laser is placed, and finally the inner glass piece is placed, wherein the specific positioning mode can be realized by adopting a jig or a CCD image sensor and the like. Putting the product into a vacuum bag, sealing, vacuumizing for 60min at room temperature, putting the vacuum bag into an oven at 110 ℃ and vacuumizing for 60min, and completely discharging air in the bag. Opening the bag of the product after vacuum pumping, taking out the product, vertically placing the inserted frame on a frame, putting the inserted frame into a high-pressure reaction kettle, firstly heating the temperature from room temperature to 100 ℃, heating the pressure to 0.5MPa, keeping the temperature at the pressure and the temperature for 30min, continuously heating the temperature to 150 ℃, and boosting the pressure to 1.2 MPa; and maintaining the temperature and the pressure for 60min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (S1).
Example 2
In this embodiment, three layers of 2.5D composite processes are performed on two PVB films with thicknesses of 0.025mm and three layers of 2.5D glass pieces (upper glass piece, middle glass piece and lower glass piece) with thicknesses of 0.4mm and 0.15mm (TFT display screen substrate glass, TFT glass for short) and 0.25mm, respectively.
The manufacturing process comprises the following steps: firstly, respectively carrying out processes of slicing, CNC (computer numerical control) processing, polishing, edge sweeping, chemical strengthening and the like on upper glass, middle glass and lower glass with the thickness of 0.4mm, 0.15mm (TFT glass) and 0.25mm to process upper glass, middle glass and lower glass with 2.5D structures; secondly, the lower glass piece is placed into a jig, then a PVB film cut by laser is placed into the jig, and then the middle glass piece, the PVB film and the upper glass piece are sequentially placed into the jig, wherein the specific positioning mode can be realized by adopting modes such as the jig, the CCD and the like. Putting the product into a vacuum bag, sealing, vacuumizing for 30min at room temperature, and then putting the vacuum bag into an oven at 100 ℃ for vacuumizing for 40min to completely exhaust air in the bag. Opening the bag of the vacuumized product, taking out the product, vertically placing the inserted frame on a frame, putting the inserted frame into a high-pressure reaction kettle, firstly heating the temperature from room temperature to 90 ℃, heating the pressure to 0.6MPa, keeping the temperature at the pressure and the temperature for 25min, continuously heating the temperature to 140 ℃, and boosting the pressure to 1.2 MPa; and maintaining the temperature and the pressure for 40min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (S2).
Example 3
In this embodiment, three 2.5D glass pieces (an upper glass piece, a middle glass piece, and a lower glass piece) each having a thickness of 0.25mm are used, and two PVB films each having a thickness of 0.05mm are subjected to a three-layer 2.5D lamination process.
The manufacturing process comprises the following steps: respectively carrying out processes of slicing, CNC (computerized numerical control) machining, polishing, edge sweeping, chemical strengthening and the like on upper glass, middle glass and lower glass with the thickness of 0.25mm to machine upper glass pieces, middle glass pieces and lower glass pieces with 2.5D structures; secondly, the lower glass piece is placed into a jig, then a PVB film cut by laser is placed into the jig, and then the middle glass piece, the PVB film and the upper glass piece are sequentially placed into the jig, wherein the specific positioning mode can be realized by adopting the jig, the CCD and the like. Putting the product into a vacuum bag, sealing, vacuumizing for 30min at room temperature, and then putting the vacuum bag into an oven at 100 ℃ for vacuumizing for 40min to completely exhaust air in the bag. Opening the bag of the vacuumized product, taking out the product, vertically placing the inserted frame on a frame, putting the inserted frame into a high-pressure reaction kettle, firstly heating the temperature from room temperature to 90 ℃, heating the pressure to 0.7MPa, keeping the temperature at the pressure and the temperature for 20min, continuously heating the temperature to 140 ℃, and boosting the pressure to 1.2 MPa; and maintaining the temperature and the pressure for 40min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (S3).
Example 4
In this embodiment, three 2.5D glass pieces (an upper glass piece, a middle glass piece, and a lower glass piece) each having a thickness of 0.3mm are used, and two PVB films each having a thickness of 0.04mm are subjected to a three-layer 2.5D lamination process.
The manufacturing process comprises the following steps: respectively carrying out processes of slicing, CNC (computerized numerical control) machining, polishing, edge sweeping, chemical strengthening and the like on upper glass, middle glass and lower glass with the thickness of 0.3mm to machine upper glass pieces, middle glass pieces and lower glass pieces with 2.5D structures; secondly, the lower glass piece is placed into a jig, then a PVB film cut by laser is placed into the jig, and then the middle glass piece, the PVB film and the upper glass piece are sequentially placed into the jig, wherein the specific positioning mode can be realized by adopting the jig, the CCD and the like. Putting the product into a vacuum bag, sealing, vacuumizing for 40min at room temperature, putting the vacuum bag into an oven at 120 ℃ and vacuumizing for 30min, and completely discharging air in the bag. Opening the bag of the product after vacuum pumping, taking out the product, vertically placing the inserted frame on a frame, putting the inserted frame into a high-pressure reaction kettle, firstly heating the temperature from room temperature to 130 ℃, heating the pressure to 0.7MPa, keeping the temperature at the pressure and the temperature for 30min, continuously heating the temperature to 160 ℃, and boosting the pressure to 1.5 MPa; and maintaining the temperature and the pressure for 30min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (S4).
Example 5
In this embodiment, three 2.5D glass pieces (an upper glass piece, a middle glass piece, and a lower glass piece) with thicknesses of 0.1mm, 0.2mm, and 0.3mm are respectively used, and two PVB films with thicknesses of 0.06mm are used to perform a three-layer 2.5D composite process.
The manufacturing process comprises the following steps: firstly, respectively carrying out processes of slicing, CNC machining, polishing, edge sweeping, chemical strengthening and the like on upper glass, middle glass and lower glass with the thicknesses of 0.1mm, 0.2mm and 0.3mm to machine upper glass pieces, middle glass pieces and lower glass pieces with 2.5D structures; secondly, the lower glass piece is placed into a jig, then a PVB film cut by laser is placed into the jig, and then the middle glass piece, the PVB film and the upper glass piece are sequentially placed into the jig, wherein the specific positioning mode can be realized by adopting the jig, the CCD and the like. Putting the product into a vacuum bag, sealing, vacuumizing for 50min at room temperature, and then putting the vacuum bag into an oven at 90 ℃ for vacuumizing for 50min to completely exhaust air in the bag. Opening the bag of the product after vacuum pumping, taking out the product, vertically placing the inserted frame on a frame, putting the inserted frame into a high-pressure reaction kettle, firstly heating the temperature from room temperature to 120 ℃, heating the pressure to 0.6MPa, keeping the temperature at the pressure and the temperature for 25min, continuously heating the temperature to 160 ℃, and boosting the pressure to 1.3 MPa; and maintaining the temperature and the pressure for 50min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (S5).
Example 6
In this embodiment, two 2.5D glass pieces (upper glass piece and lower glass piece) with thicknesses of 0.25mm and 0.4mm are adopted, and a PVB film with a thickness of 0.075mm is subjected to a two-layer 2.5D composite process.
The manufacturing process comprises the following steps: firstly, respectively carrying out processes of slicing, CNC (computer numerical control) machining, polishing, edge sweeping, chemical strengthening and the like on upper glass and lower glass with the thicknesses of 0.25mm and 0.4mm to machine upper glass pieces and lower glass pieces with 2.5D structures; secondly, the lower glass piece is placed into a jig, then a PVB film cut by laser is placed into the jig, and then the upper glass piece is placed into the jig in sequence, wherein the specific positioning mode can be realized by adopting the jig, the CCD and other modes. Thirdly, putting the products into a vacuum box, vacuumizing for 60min at room temperature, heating to 120 ℃, and vacuumizing for 40min to completely exhaust air. Opening the vacuum box after vacuum pumping, taking out the product, vertically placing the inserted frame on the frame, putting the inserted frame into a high-pressure reaction kettle, firstly raising the temperature from room temperature to 100 ℃, raising the pressure to 0.7MPa, keeping the temperature at the pressure and the temperature for 30min, continuously raising the temperature to 160 ℃, and raising the pressure to 1.5 MPa; and maintaining the temperature and the pressure for 30min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (S6).
Example 7
In this embodiment, two 2.5D glass pieces (upper glass piece and lower glass piece) with a thickness of 0.4mm and a thickness of 0.25mm (TFT glass) are used, and a PVB film with a thickness of 0.1mm is used to perform a two-layer 2.5D composite process.
The manufacturing process comprises the following steps: respectively carrying out processes of slicing, CNC (computer numerical control) machining, polishing, edge sweeping, chemical strengthening and the like on upper glass and lower glass with the thicknesses of 0.4mm and 0.25mm to machine upper glass pieces and lower glass pieces with 2.5D structures; secondly, the lower glass piece is placed into a jig, then a PVB film cut by laser is placed into the jig, and then the upper glass piece is placed into the jig, wherein the specific positioning mode can be realized by adopting modes such as the jig, the CCD and the like. Putting the product into a vacuum bag, sealing, vacuumizing for 30min at room temperature, putting the vacuum bag into a 110 ℃ oven, and vacuumizing for 40min to completely exhaust air in the bag. Opening the bag of the vacuumized product, taking out the product, vertically placing the inserted frame on a frame, putting the inserted frame into a high-pressure reaction kettle, firstly heating the temperature from room temperature to 90 ℃, heating the pressure to 0.6MPa, keeping the temperature at the pressure and the temperature for 30min, continuously heating the temperature to 160 ℃, and boosting the pressure to 1.2 MPa; and maintaining the temperature and the pressure for 40min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (S7).
Example 8
The same as example 3 except that the TPU film was used as the organic film, a laminated glass was obtained (S7).
Example 9
The laminated glass was obtained as in example 3 except that a PO film was used as the organic film (S8).
Example 10
Similar to example 3, except that the organic film thickness was 0.1mm, a laminated glass was obtained (S9).
Example 11
Similar to example 3, except that the two organic films were 0.05mm and 0.075mm in thickness, respectively, a laminated glass was obtained (S10).
Example 12
A laminated glass was obtained in the same manner as in example 3, except that an SGP film was used as the organic film (S11).
Example 13
A laminated glass was obtained in the same manner as in example 3, except that an EVA film was used as the organic film (S12).
Example 14
Similar to example 2, except that the upper, middle and lower glass pieces were 0.25mm, 0.3mm (TFT glass) and 0.5mm in thickness, respectively, a laminated glass was obtained (S14).
Example 15
Similar to example 2, except that the upper, middle and lower glass pieces were 0.3mm, 0.3mm (TFT glass) and 0.3mm in thickness, respectively, a laminated glass was obtained (S15).
Example 16
Similar to example 2, except that the upper, middle and lower glass pieces were 0.25mm, 0.5mm (TFT glass) and 0.25mm in thickness, respectively, a laminated glass was obtained (S16).
Example 17
A laminated glass was obtained in the same manner as in example 7 except that the upper and lower glasses had thicknesses of 0.3mm and 0.5mm, respectively (TFT glass) (S17).
Example 18
A laminated glass was obtained in the same manner as in example 7 except that the upper and lower glasses had thicknesses of 0.5mm and 0.3mm, respectively (TFT glass) (S18).
Example 19
A laminated glass was obtained in the same manner as in example 7 except that the upper and lower glasses had thicknesses of 0.4mm and 0.4mm, respectively (TFT glass) (S19).
Example 20
The same as example 7 except that TFD panel substrate glass was used in place of the TFT glass, a laminated glass was obtained (S20).
Example 21
The difference from example 7 is that UFB display panel substrate glass was used instead of TFT glass, to obtain laminated glass (S21).
Example 22
The same as example 7 except that the OLED display panel substrate glass was used in place of the TFT glass, a laminated glass was obtained (S22).
Example 23
The same as example 7 except that ASV display panel substrate glass was used in place of the TFT glass, a laminated glass was obtained (S23).
Example 24
The same as example 7 except that STN display panel substrate glass was used in place of the TFT glass, a laminated glass was obtained (S24).
Example 25
The same as example 7 except that CSDN display panel substrate glass was used instead of TFT glass, a laminated glass was obtained (S25).
Example 26
The same as example 7 except that ITO display panel substrate glass was used in place of TFT glass, a laminated glass was obtained (S26).
Comparative example 1
A single layer of 3D glass (D1) having a thickness, structure, shape and size corresponding to those of the laminated glass obtained in example 1.
Comparative example 2
Single layer 2.5D glass (D2) having a thickness, structure, shape and size consistent with the laminated glass obtained in example 2.
Comparative example 3
A laminated glass (D3) was obtained in the same manner as in example 3, except that an OCR film (optically transparent resin film) was used as the organic film.
Comparative example 4
In this embodiment, two 2.5D glass pieces (upper glass piece and lower glass piece) each having a thickness of 5mm are used, and a PVB film having a thickness of 0.38mm is used to perform a two-layer 2.5D composite process.
The manufacturing process comprises the following steps: respectively carrying out processes of slicing, CNC (computer numerical control) machining and the like on upper glass and lower glass with the thickness of 5mm to machine upper glass pieces and lower glass pieces with 2.5D structures; and secondly, sequentially placing the lower glass piece, the PVB film and the upper glass piece, wherein the specific positioning mode can be realized by adopting a jig mode. Thirdly, putting the product into a vacuum bag, sealing the vacuum bag, vacuumizing for 40min at 35 ℃, then putting the vacuum bag into a 110 ℃ oven, and vacuumizing for 30min to completely exhaust air in the bag. Opening the bag of the product after vacuum pumping, taking out the product, putting the product into a high-pressure reaction kettle, firstly heating the temperature from room temperature to 100 ℃, heating the pressure to 0.7MPa, keeping the temperature for 15min under the pressure and the temperature, continuously heating the product to 130 ℃, and boosting the pressure to 1.1 MPa; and maintaining the temperature and the pressure for 30min, and finally reducing the temperature to room temperature and then reducing the pressure to obtain the laminated glass (D4).
Comparative example 5
In the same manner as in example 7, except for using a PVB film having a thickness of 0.01mm, a laminated glass (D5) was obtained.
Comparative example 6
In the same manner as in example 7, except for using a PVB film having a thickness of 0.2mm, a laminated glass (D6) was obtained.
And (3) performance testing:
the laminated glass or single-layer glass obtained in the above examples and comparative examples was subjected to a bubble observation test, a transmittance test, a ball drop test and a bending resistance test, and the specific test methods were as follows:
and (3) observing and testing bubbles: the laminated glass or the single-layer glass is magnified by 25 times to observe whether bubbles exist.
And (3) transmittance test: the Transmittance of the sample was measured using an ORIHARA ovs-1 Transmitance tester.
Ball drop test: the steel balls with the diameter of 20mm are dropped onto the laminated glass or the single-layer glass from different heights by adopting 32g +/-1 g, and 9 points are tested. In the test process, the upper glass in the laminated glass is contacted with the falling ball, the lower glass is broken when the upper glass is broken, and the upper glass is not broken.
And (3) bending resistance test: the mechanical bending strength tester 4PB of Si Tai instruments Co., Ltd, Dongguan is adopted for testing.
The test results are shown in table 1 below:
TABLE 1
As can be seen from the data in table 1, the transmittance of the laminated glass in the embodiment of the present invention is equivalent to that of a single-layer glass with the same thickness, and the laminated glass has significantly improved bending strength, significantly improved drop resistance and explosion resistance, and better safety.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A method of making a laminated glass for an electronic device, comprising:
laminating at least two glass pieces and at least one organic film, and performing positioning treatment to obtain a laminated structural member, wherein the organic film is arranged between every two adjacent glass pieces, the thickness of each glass piece is 0.1-0.5 mm, and the thickness of each organic film is 25-100 micrometers;
performing first vacuum-pumping treatment on the laminated structural member at room temperature;
carrying out second vacuumizing treatment on the laminated structural member subjected to the first vacuumizing treatment under the heating condition;
pressurizing and heating the laminated structural member subjected to the second vacuum-pumping treatment to obtain the laminated glass;
wherein the first vacuumizing treatment time is 30-60 minutes;
performing the second vacuum-pumping treatment for 30-60 minutes at the temperature of 90-150 ℃;
the step of subjecting the laminated structure to a pressure and heat treatment includes:
heating the laminated structural member to 90-130 ℃, pressurizing to 0.5-0.7MPa, and keeping for 20-30 minutes;
the laminated structure is continuously heated to 180 ℃ at 130 ℃, pressurized to 1.2-1.5MPa and kept for 30-60 minutes.
2. The method according to claim 1, wherein the positioning process is performed by a positioning jig or a CCD image sensor.
3. A laminated glass for electronic devices prepared by the method of claim 1 or 2, comprising:
at least two glass pieces and at least one organic film, which are arranged in a stacked manner, the organic film being arranged between two adjacent glass pieces,
the thickness of the glass piece is 0.1-0.5 mm, the thickness of the organic film is 25-100 microns, and the glass piece is cover plate glass, display screen substrate glass, touch screen substrate glass or TFT display screen substrate glass.
4. The laminated glass according to claim 3, wherein the glass member is a flat glass, a 2.5D glass or a 3D glass.
5. The laminated glass according to claim 3 or 4, wherein at least one of the following conditions is satisfied:
magnifying by 25 times with a magnifying glass to observe that no bubbles exist;
a transmittance of 92% or more;
no glass splash is generated during crushing;
when the glass piece on the uppermost layer in the laminated glass is subjected to a crushing acting force, the glass piece on the lowermost layer in the laminated glass is crushed, and the glass piece on the uppermost layer is not crushed;
the bending strength is more than 500 MPa;
the flatness is 0.01-0.03 mm;
the profile tolerance is 0.03-0.05 mm.
6. The laminated glass according to claim 3, wherein the organic film satisfies at least one of the following conditions:
the organic film comprises at least one of a polyvinyl butyral film, an ionic film, an ethylene-vinyl acetate copolymer film, a thermoplastic polyurethane elastomer rubber film and a propylene oxide film;
the organic film has at least one of a predetermined color and a predetermined pattern.
7. An electronic device housing, wherein at least a portion of the electronic device housing is formed of the laminated glass according to any one of claims 3 to 6.
8. A touch screen or a display screen, wherein a substrate of the touch screen or the display screen is made of the laminated glass of any one of claims 3 to 6.
9. An electronic device comprising the electronic device housing of claim 7 or the touch screen or display of claim 8.
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| CN203007139U (en) * | 2012-07-27 | 2013-06-19 | 肖特玻璃科技(苏州)有限公司 | Laminated glass for mobile electronic device |
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| JP5177364B2 (en) * | 2007-08-22 | 2013-04-03 | 株式会社ブリヂストン | Method for producing interlayer film for laminated glass |
| WO2017170795A1 (en) * | 2016-03-30 | 2017-10-05 | 東洋インキＳｃホールディングス株式会社 | Resin composition and electronic element |
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| CN101306922A (en) * | 2008-07-02 | 2008-11-19 | 福耀玻璃工业集团股份有限公司 | Process for production of noise insulation laminated glass for vehicle |
| CN203007139U (en) * | 2012-07-27 | 2013-06-19 | 肖特玻璃科技(苏州)有限公司 | Laminated glass for mobile electronic device |
| CN105109179A (en) * | 2015-06-30 | 2015-12-02 | 太仓耀华玻璃有限公司 | Novel dry laminated glass production process |
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