CN112358195A - Impact-resistant glass cover plate, preparation method thereof and electronic equipment - Google Patents
Impact-resistant glass cover plate, preparation method thereof and electronic equipment Download PDFInfo
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- CN112358195A CN112358195A CN202011221965.5A CN202011221965A CN112358195A CN 112358195 A CN112358195 A CN 112358195A CN 202011221965 A CN202011221965 A CN 202011221965A CN 112358195 A CN112358195 A CN 112358195A
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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
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
- C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
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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
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
- C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
- C03C17/322—Polyurethanes or polyisocyanates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Surface Treatment Of Glass (AREA)
- Laminated Bodies (AREA)
Abstract
The application discloses an impact-resistant glass cover plate, a preparation method thereof and electronic equipment. This impact-resistant glass apron includes: a glass substrate; and an impact-resistant film layer disposed on one surface of the glass substrate; wherein the elastic modulus of the impact-resistant film layer is not lower than 200 MPa. Therefore, the impact-resistant glass cover plate has excellent impact resistance, the thickness of a glass substrate can be effectively reduced due to the arrangement of the impact-resistant film layer, so that the whole thickness of the glass cover plate is thin, the weight of the glass cover plate is light, and the impact-resistant film layer has the function of an explosion-proof film and can prevent the glass cover plate from bursting and splashing; moreover, the elastic modulus of the impact-resistant film layer is more than or equal to 200MPa, so that the impact-resistant film layer with a relatively thin thickness can have relatively good explosion-proof performance and impact resistance, and the glass cover plate can have relatively good impact resistance and light weight (relatively light weight and relatively thin thickness).
Description
Technical Field
The application relates to the field of electronics, in particular to an impact-resistant glass cover plate, a preparation method of the impact-resistant glass cover plate and electronic equipment.
Background
At present, users have higher and higher performance requirements on electronic devices such as mobile phones, and the thinning of the mobile phones is also a development direction of the electronic devices. The thinning of the whole mobile phone means that parts such as a housing of the mobile phone and a glass cover plate of a touch screen are developed towards thinning. However, the reduction of the thickness of the glass cover plate can cause the impact resistance to be significantly reduced, and the overall performance of the mobile phone is reduced, so that the reduction of the thickness of the glass cover plate is difficult on the premise of ensuring the performance of the glass cover plate. If a glass cover plate can be proposed which has a relatively thin thickness and a relatively good impact resistance, the above-mentioned problems can be alleviated or even solved at least to some extent.
Therefore, research on the current impact-resistant glass cover plate is still in depth.
Disclosure of Invention
The present application is based on the discovery and recognition by the inventors of the following facts and problems:
the current thinning of 2D or 2.5D glass cover plates presents major difficulties, one of which is important: thinning the glass cover plate results in a significant reduction in its impact resistance. Take Corning gorilla fifth generation glass (GG5) cover plate as an example: glass apron thickness is 0.78mm before the attenuate, and glass apron thickness is 0.68mm after the attenuate, compares the glass apron of 0.78mm thickness, and the shock resistance greatly reduced of the glass apron of 0.68mm thickness takes the ball drop performance as an example and explains: the number of samples tested with the same thickness is 10, the ball falling height is 20cm, and after GG5 is thinned, the failure rate of the glass cover plate is increased from 20% to 80%; the ball drop height at which a 0.78mm thick glass cover plate begins to fail is 20cm, while the ball drop height at which a 0.68mm thick glass cover plate begins to fail after thinning is 15 cm. Moreover, the four-axis strength of the GG5 glass cover plate after thinning (i.e., the glass cover plate with the thickness of 0.68 mm) is obviously reduced compared with the four-axis strength before thinning (i.e., the glass cover plate with the thickness of 0.78 mm). The inventors have found that the glass cover plate has a significant reduction in both ball drop performance and four-axis strength performance after the thickness of the glass cover plate is reduced from 0.78mm to 0.68 mm. In the field, the impact resistance of the glass is improved by acid pickling strengthening treatment, a silicon-oxygen film on the surface of the glass is damaged by acid pickling treatment, the surface containing microcracks is uniformly etched, and the stress concentration phenomenon is reduced. However, the method has a limited improvement on the impact resistance of the glass, the effect of reducing the microcracks on the surface of the glass is not durable, and the treated glass is not friction-resistant.
The inventor finds that the impact resistance of the glass substrate can be effectively improved and the aim of reducing the thickness of the glass cover plate can be achieved by forming a transparent film layer on the surface of the thinned glass substrate, wherein the film layer has higher elastic modulus.
In view of the above, in one aspect of the present application, there is provided an impact-resistant glass cover plate including: a glass substrate; and an impact-resistant film layer disposed on one surface of the glass substrate; wherein the elastic modulus of the impact-resistant film layer is not lower than 200 MPa. Therefore, the impact-resistant glass cover plate has excellent impact resistance, the thickness of a glass substrate can be effectively reduced due to the arrangement of the impact-resistant film layer, so that the whole thickness of the glass cover plate is thin, the weight of the glass cover plate is light, and the impact-resistant film layer has the function of an explosion-proof film and can prevent the glass cover plate from bursting and splashing; moreover, the elastic modulus of the impact-resistant film layer is more than or equal to 200MPa, so that the impact-resistant film layer with a relatively thin thickness can have relatively good explosion-proof performance and impact resistance, and the glass cover plate can have relatively good impact resistance and light weight (relatively light weight and relatively thin thickness).
In another aspect of the present application, a method of making an impact resistant glass cover sheet is presented, the method comprising: providing a glass substrate; coating an impact-resistant coating on one surface of the glass substrate, and curing the impact-resistant coating to obtain an impact-resistant film layer; wherein the elastic modulus of the impact-resistant film layer is not lower than 200 MPa. Thus, the impact-resistant glass cover plate prepared has all the characteristics and advantages of the impact-resistant glass cover plate, and the details are not repeated herein. In general, the impact-resistant glass cover plate prepared by the method provided by the application has excellent impact resistance, the impact-resistant film layer can prevent the glass cover plate from bursting and splashing, the safety performance of the impact-resistant glass cover plate is improved, and the impact-resistant glass cover plate can play roles in thinning and reducing weight when being used for electronic equipment such as a mobile phone and the like.
In yet another aspect of the present application, the present application proposes an electronic device comprising: a display panel assembly; and the anti-impact glass cover plate is arranged on one side of the display picture of the display panel, and the anti-impact film layer in the anti-impact glass cover plate is arranged close to the display panel assembly. Therefore, the electronic equipment has excellent shock resistance, is thin in overall thickness and light in weight, and has the function of preventing glass from splashing after being cracked.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic view of the structure of an impact resistant glass cover plate according to one example of the present application;
FIG. 2 shows a schematic view of the structure of an impact resistant glass cover plate according to another example of the present application;
FIG. 3 shows a flow chart of a method of making an impact resistant glass cover plate according to one example of the present application;
FIG. 4 shows a schematic structural diagram of an electronic device according to an example of the present application;
FIG. 5 shows comparative pictures of an impact resistant glass cover plate according to an example of the present application before a ball drop test with a glass cover plate of a comparative example;
FIG. 6 shows comparative pictures after a ball drop test of an impact resistant glass cover plate according to an example of the present application and a glass cover plate of a comparative example;
fig. 7 shows a schematic view of the glass cover plate of a) in fig. 6.
Description of reference numerals:
100: a glass substrate; 200: an impact resistant film layer; 1000: an impact resistant glass cover plate; 2000: an electronic device.
Detailed Description
Examples of the present application are described in detail below and are illustrated in the accompanying drawings. The examples described below with reference to the drawings are only for the purpose of illustrating the present application and are not to be construed as limiting the present application.
In one aspect of the present application, an impact resistant glass cover plate is presented. Specifically, referring to fig. 1, the impact-resistant glass cover plate includes a glass substrate 100 and an impact-resistant film layer 200. Wherein the impact-resistant film layer 200 is disposed on one surface of the glass substrate, and the elastic modulus of the impact-resistant film layer is not less than 200 MPa. Therefore, the impact-resistant glass cover plate has excellent impact resistance, the thickness of a glass substrate can be effectively reduced due to the arrangement of the impact-resistant film layer, so that the whole thickness of the glass cover plate is thin, the weight of the glass cover plate is light, and the impact-resistant film layer has the function of an explosion-proof film and can prevent the glass cover plate from bursting and splashing; moreover, the elastic modulus of the impact-resistant film layer is more than or equal to 200MPa, so that the impact-resistant film layer with a relatively thin thickness can have relatively good explosion-proof performance and impact resistance, and the glass cover plate can have relatively good impact resistance and light weight (relatively light weight and relatively thin thickness). When the impact-resistant glass cover plate is assembled into an electronic device, for example, a glass cover plate of a touch screen of a mobile phone, the impact-resistant glass cover plate is disposed on one side of a display screen of a display panel, and an impact-resistant film layer 200 in the impact-resistant glass cover plate is disposed adjacent to a display panel assembly. Therefore, the impact-resistant glass cover plate can provide better impact resistance and safety performance for electronic equipment.
According to the examples of the application, the impact resistance of the glass cover plate is improved by arranging the impact resistant film layer in the glass cover plate, and the glass matrix in the glass cover plate is not required to be further subjected to acid pickling and strengthening, so that the negative influence of the acid pickling and strengthening on the glass matrix can be avoided, namely the friction resistance of the glass matrix in the application is not influenced. According to an example of the present application, the glass matrix 100 of the impact resistant glass cover plate may be 2D or 2.5D glass. Referring to fig. 1, the glass substrate 100 is 2D glass. Referring to fig. 2, the glass substrate 100 is 2.5D glass, and the impact-resistant film layer 200 on one side surface thereof is also 2.5D structure. Thus, the impact resistant cover glass may provide excellent impact resistance for 2D or 2.5D cover glass.
According to some specific examples of the present application, the glass matrix thickness of the impact resistant glass cover plate may be 0.58-0.73mm, such as 0.58mm, 0.6mm, 0.61mm, 0.62mm, 0.63mm, 0.64mm, 0.65mm, 0.68 mm. From this, the glass substrate of this glass apron that shocks resistance has thinner thickness, and then helps realizing the frivolousization of glass apron, guarantees the good shock resistance of glass apron simultaneously, when the glass apron of this application was applied to electronic equipment such as cell-phone, both can solve electronic equipment's fuselage attenuate problem to a certain extent, can improve electronic equipment's anti-falling performance again.
According to some specific examples of the present application, the material of the impact resistant film layer 200 is selected from one or more of Polyamide (PA), transparent polyimide (CPI), acryl (PMMA, i.e., polymethylmethacrylate), Polycarbonate (PC), Polysulfone (PSF), Polyethersulfone (PES), cyclic olefin Copolymer (COP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyacrylate (PAA), and water-based Polyurethane (PU). Therefore, the anti-impact film layer is a transparent film layer, the display of the electronic equipment is not affected, and the anti-impact film layer formed by the materials is arranged on the glass cover plate, so that the anti-impact performance of the glass cover plate is obviously improved.
According to some examples of the present application, the thickness of the impact resistant film layer may be 0.02-0.5mm, such as 0.02mm, 0.05mm, 0.08mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5 mm. Therefore, the impact resistance of the glass cover plate can be effectively improved by the impact resistant film layer. In order to achieve thinning of the body of the electronic device, according to some specific examples of the present application, the thickness of the impact-resistant film layer is set to 0.02-0.1mm, such as 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm, 0.09mm, 0.1 mm. Therefore, the thickness of the anti-impact film layer is small, so that the glass cover plate is light and thin, the anti-impact performance of the glass cover plate can be well improved, and the use requirement of electronic equipment is effectively met.
In general, the impact-resistant glass cover plate provided by the application has excellent impact resistance, and due to the addition of the impact-resistant film layer, the impact-resistant film layer has higher elastic modulus which is not lower than 200MPa, and the impact resistance of the glass cover plate can be obviously improved by the impact-resistant film layer with thinner thickness, so that the glass cover plate can be thinned and lightened, and the glass can be prevented from cracking and splashing, and the impact resistance of electronic equipment and the performance of preventing the glass from cracking and splashing and the like can be improved when the impact-resistant glass cover plate is applied to electronic equipment such as mobile phones and the like.
In another aspect of the present application, a method of making an impact resistant glass cover plate is presented. Specifically, referring to fig. 3, the method includes the steps of:
s100: a glass substrate 100 is provided.
A glass substrate 100 is provided, and the glass substrate 100 may be 2D glass (as shown in fig. 1) or 2.5D glass (as shown in fig. 2). According to examples of the application, the thickness of the glass substrate may be 0.58-0.73mm, such as 0.58mm, 0.6mm, 0.61mm, 0.62mm, 0.63mm, 0.64mm, 0.65mm, 0.68 mm. Therefore, the glass substrate of the impact-resistant glass cover plate has a thinner thickness, so that the glass cover plate is beneficial to realizing the lightness and thinness of the glass cover plate, and when the impact-resistant glass cover plate is applied to the glass cover plate of electronic equipment such as a mobile phone, the integral thickness of the electronic equipment is reduced.
S200: an impact-resistant coating is applied to one surface of the glass substrate 100, and the impact-resistant coating is subjected to a curing process.
An impact-resistant coating is applied to one surface of the glass substrate 100 and the impact-resistant coating is subjected to a curing process to obtain the impact-resistant film layer 200. Wherein the elastic modulus of the impact-resistant film layer is not less than 200 MPa. Therefore, the prepared impact-resistant glass cover plate has excellent impact resistance, and the impact-resistant film layer can prevent glass from bursting and splashing.
According to an example of the present application, the material of the impact resistant coating may be selected from one or more selected from Polyamide (PA), transparent polyimide (CPI), acryl (PMMA, i.e., polymethylmethacrylate), Polycarbonate (PC), Polysulfone (PSF), Polyethersulfone (PES), cyclic olefin Copolymer (COP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyacrylate (PAA), water-based Polyurethane (PU). Therefore, the impact-resistant film layer is firmly combined with the glass substrate, excellent impact resistance can be provided for the prepared impact-resistant glass cover plate, and the impact-resistant glass cover plate also has an explosion-proof function.
According to some examples of the present application, the thickness of the impact resistant film layer may be 0.02-0.5mm, such as 0.02mm, 0.05mm, 0.08mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5 mm. Therefore, the impact resistance of the glass cover plate can be effectively improved by the impact resistant film layer.
According to examples of the present application, the thickness of the impact resistant film layer may be 0.02-0.1mm, such as 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm, 0.09mm, 0.1 mm. Therefore, the thickness of the anti-impact film layer is relatively thin, the thickness of the glass substrate can be thinned on the premise of ensuring other performances of the anti-impact glass cover plate, and the anti-impact glass cover plate can be further thinned. According to examples of the application, the thickness of the glass substrate may be 0.58-0.73mm, such as 0.58mm, 0.6mm, 0.61mm, 0.62mm, 0.63mm, 0.64mm, 0.65mm, 0.68 mm. The impact-resistant glass cover plate thus has a relatively thin thickness and excellent overall performance. The impact-resistant film layer and the glass substrate of the impact-resistant glass cover plate obtained by the method have relatively thin thicknesses, and the impact-resistant glass cover plate is excellent in impact resistance, so that the problem of thinning of the body of electronic equipment can be solved to a certain extent when the impact-resistant glass cover plate is applied to the electronic equipment such as a mobile phone, and the drop resistance of the electronic equipment can be improved.
The specific method of forming the impact-resistant film layer is not particularly limited as long as the impact-resistant film layer can be well bonded to the glass substrate. According to some specific examples of the present application, the impact-resistant film layer may be coated on one side of the glass substrate by flat coating, spray coating or spin coating, and the final impact-resistant film layer may be obtained by curing such as ultraviolet light irradiation curing, baking curing or standing curing (i.e., standing for a certain time in a normal temperature environment for curing). Therefore, the anti-impact film layer can be formed through a mature process, so that the yield is improved, and the cost is reduced. Wherein the skilled person can select a suitable curing manner depending on the impact resistant coating selected.
Thus, the impact-resistant glass cover plate prepared by the method provided by the application has all the characteristics and advantages of the impact-resistant glass cover plate, and the details are not repeated. In general, the impact-resistant glass cover plate prepared by the method provided by the application has excellent impact resistance, the impact-resistant film layer can prevent the glass cover plate from bursting and splashing, the safety performance of the impact-resistant glass cover plate is improved, and the impact-resistant glass cover plate can play roles in thinning and reducing weight when being used for electronic equipment such as a mobile phone and the like.
In yet another aspect of the present application, an electronic device is presented. Referring to fig. 4, the electronic device 2000 includes a display panel assembly (not shown) and an impact-resistant glass cover plate 1000. The impact-resistant glass cover plate 1000 is the impact-resistant glass cover plate described above, the impact-resistant glass cover plate 1000 is disposed on one side of the display screen of the display panel, and an impact-resistant film layer (not shown) in the impact-resistant glass cover plate 1000 is disposed close to the display panel assembly. Therefore, the electronic equipment has the advantages of thin thickness, light weight, good impact resistance and the like, and has the function of preventing glass from bursting and splashing. Those skilled in the art understand that the electronic device may further include an audio module, a CPU, a camera module, and the like.
The specific type of electronic device described herein is not particularly limited, and may be, for example, a mobile phone (as shown in fig. 4), a smart watch, a palm top computer, or a notebook computer. The electronic device may be any of various types of computer system devices that are mobile or portable and perform wireless communication. In particular, the electronic device may be a mobile or smart phone (e.g., an iPhone (TM) based phone), a Portable gaming device (e.g., Nintendo DS (TM), PlayStation Portable (TM), Gameboy Advance (TM), iPhone (TM)), a laptop, a PDA, a Portable internet device, a music player, and a data storage device, other handheld devices, and a head-mounted device such as a watch, an in-ear headphone, a pendant, a headset, etc., and other wearable devices (e.g., a head-mounted device (HMD) such as an electronic necklace, an electronic garment, an electronic bracelet, an electronic tattoo, or a smart watch).
The electronic device may also be any of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controllers, pagers, laptop computers, desktop computers, printers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving picture experts group (MPEG-1 or MPEG-2) audio layer 3(MP3) players, portable medical devices, and digital cameras and combinations thereof.
In some cases, the electronic device may perform a variety of functions (e.g., playing music, displaying videos, storing pictures, and receiving and sending telephone calls). If desired, the electronic device may be a portable device such as a cellular telephone, media player, other handheld device, wristwatch device, pendant device, earpiece device, or other compact portable device.
The present application is described below by way of specific examples, and those skilled in the art will appreciate that the following specific examples are for illustrative purposes only and do not limit the scope of the present application in any way. In addition, in the following examples, materials and equipment used are commercially available unless otherwise specified. If in the examples that follow, specific processing conditions and processing methods are not explicitly described, processing may be performed using conditions and methods known in the art.
Example 1
Taking Corning gorilla fifth-generation glass with the thickness of 0.68mm and the thickness of 2.5D as a glass substrate, coating water-based Polyurethane (PU) on one side of the glass substrate in a spraying mode, standing at normal temperature for curing to obtain the impact-resistant glass cover plate, wherein the average thickness of an impact-resistant film layer formed by the water-based polyurethane is 0.03 mm. Wherein the aqueous polyurethane has an elastic modulus of 1500 MPa.
Example 2
The glass substrate of the fifth generation of chimpanzee with the thickness of 0.68mm and the thickness of 2.5D is coated with Polyacrylate (PAA) on one side of the glass substrate by adopting a flat coating mode, and then the impact-resistant glass cover plate is obtained by adopting UV curing. The thickness of the impact-resistant film layer formed of polyacrylate was 0.05 mm. Wherein the elastic modulus of the polyacrylate is 900 MPa.
Example 3
The glass substrate of the fifth generation of chimpanzee with the thickness of 0.68mm and the thickness of 2.5D is coated with Polyacrylate (PAA) on one side of the glass substrate by adopting a flat coating mode, and then the impact-resistant glass cover plate is obtained by adopting UV curing. The thickness of the impact-resistant film layer formed in this example was 0.01 mm. Wherein the elastic modulus of the polyacrylate is 900 MPa.
Comparative example 1
A Corning gorilla fifth generation glass with a thickness of 0.68mm, 2.5D, not coated with an impact resistant film layer.
Comparative example 2
A Corning gorilla fifth generation glass with a thickness of 0.78mm, 2.5D, not coated with an impact resistant film layer.
The glass cover plates of the examples and comparative examples were subjected to performance tests including an adhesion (water boiling hundred grid) test, a monomer ball drop performance test, a four-axis strength test, and a sandpaper drop performance test. The test results are shown in table 1 below:
table 1 results of various performance tests of examples and comparative examples
Note: the average height of failure is recorded as H, the total number of ball drop tests of each sample is 10, and the ball drop heights are recorded as H in sequence1、h2、h3…hn…, number of samples corresponding to high failure is n1、n2、n3…nn…, wherein n is1+n2+n3+…+nn+ … is 10, wherein the drop height of the ball drop test and the corresponding number of failed samples for example 1, comparative example 1 and comparative example 2 can be found in table 2 below, and the specific calculation method is as follows:
the following describes in detail the procedure of the boiling test of the impact-resistant glass cover plate obtained in example 2, taking the boiling test as an example: when the mixture is boiled in water for 1 hour at 80 ℃, the phenomena of falling off, foaming, discoloration and the like are found to be avoided. And then, drawing 10 × 10 small grids with 1mm × 1mm on the surface of the test sample by using a hundred-grid cutter, and then carrying out a pulling test by using an adhesive tape, wherein the edges and the cross points marked by the hundred-grid cutter are not peeled off, and the adhesive force can reach 4B. It is known that the impact resistant film layer can be effectively bonded to the glass substrate. The product obtained in example 1 has an adhesive force of 3B, and the impact-resistant film layer and the glass substrate can be effectively combined and are well bonded. The product in example 3 also has an adhesion force of 4B in a test, and the anti-impact film layer is well adhered to the glass substrate.
And (3) ball drop performance test: the test quantity of each sample is 10, the samples are placed on a horizontal marble experiment table, the ball body begins to fall over the samples from a lower height, if the fracture of the glass substrate is recorded as failure, the same height of the same sample needs to be tested for 5 times, the height of the ball body is lifted after the fracture is passed, the samples which are not failed are continuously tested until the failure is reached, and the test is completed.
Falling ball performance test results: by taking the average height of failure as a judgment standard, referring to table 1 for specific data, the ball dropping performance of examples 1, 2 and 3 is greatly improved compared with that of comparative examples 1 and 2. The falling ball performance of each example was improved compared to the product in the comparative example, and the improvement in the falling ball performance of examples 1 and 2 was more significant. As can be seen from comparison between example 3 and example 2, the reason why the lifting effect is not sufficiently remarkable in example 3 is that the thickness of the impact-resistant film layer in example 3 is only 0.01mm, which is relatively thin. The partial ball drop impact data can be seen in table 2 below:
TABLE 2 comparison table of accumulated falling ball impact failure rate of some products
Note: the total number of the ball falling performance of each product in the table 2 is 10, and the height of the same sample can be increased for continuous testing without failure after 5 times of testing at the same height.
As can be seen from Table 2, the GG5 glass cover plate with the thickness of 0.68mm has the initial height of ball drop failure reduced from 20cm to 15cm, the glass thickness is reduced to 0.68mm, the cumulative failure rate of 20cm is increased from 20% to 80%, the cumulative failure rate of 25cm is increased from 70% to 100%, and the impact resistance of the glass cover plate is obviously reduced due to the reduction of the glass thickness compared with the GG5 glass cover plate with the thickness of 0.78 mm. While the initial failure height of example 1 was 80cm, it was found that the impact resistance of the glass cover plate was significantly improved by the impact resistant film layer having a thickness of 0.03 mm.
The following is detailed by the ball drop test results for the product of example 1 and comparative example 1:
in fig. 5, a) is a picture before the ball drop test of the product in example 1, and b) is a picture before the ball drop test of the product in comparative example 1, wherein black at the frame (i.e. around the product) is ink and is provided for covering the traces below the frame when the complete machine is assembled. As can be seen from FIG. 5, before the ball drop test, the product appearance is basically consistent, no obvious defect exists, and the thickness and material of the glass substrate are also consistent.
In fig. 6, a) is a picture after a ball drop test of the product in example 1, and b) is a picture after a ball drop test of the product in comparative example 1, and it can be seen from fig. 6 that the product in example 1 fails after the ball drop test and still maintains the original appearance and appearance without the phenomenon of glass splash, while the product in comparative example 1 fails after the ball drop test and fails to maintain the integrity of the appearance and the glass splashes around. The contrast can know that the ball falling performance of the impact-resistant glass cover plate is obviously improved. Further, referring to fig. 7, which is a close-up shot of a) in fig. 6), it can be seen that, although the glass is broken, the glass still maintains the whole cover plate, and no glass splash occurs, and it can be seen that the impact-resistant film layer has a function of preventing the glass from being broken and splashed.
Four-axis strength test: the number of each sample tested was 20, using a four-axis bending tester, and tested according to national standard JCT 977-2005.
Four-axis strength property test results: the four-axis strength of examples 1 and 2 was significantly improved compared to the four-axis strength of comparative example 1, while example 3 had a thin impact-resistant film layer, but the four-axis strength was still somewhat improved compared to comparative example 1. Therefore, the impact-resistant film layer has proper thickness, and the effect of obviously improving the four-axis strength of the glass cover plate can be achieved.
Testing the falling performance of the sand paper: the test quantity of each sample is 10, the glass cover plate is fixed on the test bed, the sand paper is attached to the pendulum bob, the pendulum bob is arranged at a fixed height and is allowed to fall down to collide with the glass cover plate, if the glass substrate is broken, the pendulum bob and the sand paper are lifted if the glass substrate falls for 3 times, and the sample which does not fail is tested continuously until the sample fails.
The test result of the falling performance of the sand paper is as follows: the mean height to failure of comparative example 1 was 35cm, the mean height to failure of example 1 was 38cm, the mean height to failure of example 2 was 38cm, and the mean height to failure of example 3 was 36cm, indicating that the mean height to failure for sandpaper drop test was significantly increased for both the samples of examples 1 and 2, and slightly increased for the sample of example 3, compared to the sample of comparative example 1. Therefore, an anti-impact film layer is formed on the surface of one side of the glass cover plate, and the thickness of the film layer is proper, so that the falling performance of the abrasive paper of the glass cover plate can be obviously improved.
According to various tests, the impact-resistant glass cover plate has excellent impact resistance, the impact-resistant film layer can prevent glass from being cracked and splashed, the thickness of the body of the electronic equipment can be effectively reduced when the impact-resistant glass cover plate is used for the electronic equipment, and the overall performance of the electronic equipment can be improved.
In the description herein, references to the description of the terms "one example," "another example," "yet another example," "some examples," "some specific examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the example is included in at least one example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more examples. Moreover, various examples and features of different examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although examples of the present application have been shown and described above, it should be understood that the above examples are not to be construed as limiting the present application and that those of ordinary skill in the art may effect alterations, modifications, substitutions and variations to the above examples without departing from the scope of the present application.
Claims (10)
1. An impact resistant glass cover plate, comprising:
a glass substrate; and
an impact-resistant film layer disposed on one surface of the glass substrate;
wherein the elastic modulus of the impact-resistant film layer is not lower than 200 MPa.
2. The impact-resistant glass cover plate according to claim 1, wherein the impact-resistant film layer is made of one or more materials selected from the group consisting of polyamide, transparent polyimide, acryl, polycarbonate, polysulfone, polyethersulfone, cyclic olefin copolymer, polyethylene terephthalate, polyethylene naphthalate, polyacrylate, and water-based polyurethane.
3. The impact-resistant glass cover sheet according to claim 1, wherein the impact-resistant film layer has a thickness of 0.02 to 0.5 mm.
4. An impact-resistant glass cover plate according to claim 3, characterized in that the thickness of the impact-resistant film layer is 0.02-0.1 mm.
5. An impact-resistant glass cover plate according to any of claims 1 to 4, wherein the glass matrix is 2D or 2.5D glass.
6. An impact-resistant glass cover plate according to any one of claims 1 to 4, characterized in that the thickness of the glass matrix is 0.58-0.73 mm.
7. A method of making an impact resistant glass cover plate, comprising:
providing a glass substrate; and
coating an impact-resistant coating on one surface of the glass substrate, and curing the impact-resistant coating to obtain an impact-resistant film layer;
wherein the elastic modulus of the impact-resistant film layer is not lower than 200 MPa.
8. The method according to claim 7, wherein the curing treatment is ultraviolet light irradiation curing, baking curing or standing curing.
9. The method of claim 7, wherein the impact resistant film layer is formed by flat coating, spray coating, or spin coating.
10. An electronic device, comprising:
a display panel assembly; and
the impact-resistant glass cover plate of any one of claims 1 to 6, wherein the impact-resistant glass cover plate is disposed on one side of the display screen of the display panel, and an impact-resistant film layer in the impact-resistant glass cover plate is disposed adjacent to the display panel assembly.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113845833A (en) * | 2021-09-29 | 2021-12-28 | 厦门三德信科技股份有限公司 | Coating for improving ball dropping performance of mobile phone cover plate and preparation method thereof |
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| CN1341083A (en) * | 1999-01-11 | 2002-03-20 | 肖特显示玻璃有限责任公司 | Thin glass film matrix coated with polymer |
| CN111542941A (en) * | 2017-10-11 | 2020-08-14 | 康宁公司 | Foldable electronic device module with impact resistance and bending resistance |
| CN214400263U (en) * | 2020-11-05 | 2021-10-15 | Oppo广东移动通信有限公司 | Impact-resistant glass cover plate and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341083A (en) * | 1999-01-11 | 2002-03-20 | 肖特显示玻璃有限责任公司 | Thin glass film matrix coated with polymer |
| CN111542941A (en) * | 2017-10-11 | 2020-08-14 | 康宁公司 | Foldable electronic device module with impact resistance and bending resistance |
| CN214400263U (en) * | 2020-11-05 | 2021-10-15 | Oppo广东移动通信有限公司 | Impact-resistant glass cover plate and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113845833A (en) * | 2021-09-29 | 2021-12-28 | 厦门三德信科技股份有限公司 | Coating for improving ball dropping performance of mobile phone cover plate and preparation method thereof |
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