Composite mask device and mask method for coated glass

Abstract

The application provides a composite mask device and a mask method for coated glass, wherein the composite mask device comprises a glass cover plate and a high-temperature-resistant polymer film, the glass cover plate partially covers the high-temperature-resistant polymer film to form an overlapping area, and the front end of the high-temperature-resistant polymer film extends out of the overlapping area. The composite mask device provided by the application adopts the combination of the glass cover plate and the high-temperature-resistant polymer film, and when the device is used for masking the coated glass, the deformation problem existing in the use process of the existing mask device can be completely avoided, a large-area region can be covered, the production frequency is fast, and the coating atmosphere is not polluted. When the composite mask device provided by the application is used for coating and masking, the ghost boundary can be less than 0.8 mm, the film position fluctuation is small, that is, the size precision is not greater than ±0.5 mm.

Description

Technical Field

[0001] The invention relates to a composite material mask device and a coated glass masking method, belonging to the technical field of coated glass coating and film removal. Background Art

[0002] On the one hand, automotive glass accounts for over 40% of a car's total sun-exposed area. In the summer, controlling sunlight from entering the car interior is extremely important. Typically, automotive glass is coated with a heat-reflective film on the glass surface. This film is a metal or semiconductor film, deposited using a vacuum magnetron sputtering process. However, this process cannot selectively coat specific areas, so only the entire surface can be coated. On the other hand, with the advancement of intelligent and connected vehicles, more and more information interaction components are being installed in cars, such as LiDAR, intelligent driver-assistance cameras, and TBX antennas. These information interaction components tend to be placed behind the glass. Heat-insulating metal or semiconductor films can affect the transmission of light and electromagnetic waves, necessitating the provision of a film-free window on the glass for these information transmission components. Existing methods for this film-free window typically utilize stainless steel metal masks, coating masks (CN 106746707 A, CN 113880450 A, and CN 115583805A), or laser film removal after coating (CN114559163A). However, stainless steel masks are prone to deformation and difficult to correct; coating masks pose the risk of contaminating the coating atmosphere and are difficult to remove; and laser removal cannot completely remove the film layer and is slow to produce results for larger areas. Furthermore, these masking or removal technologies suffer from poor removal accuracy and wide ghosting margins, failing to meet the mainstream requirements of a removal accuracy of less than ±1.5mm and a ghosting margin of less than 1mm.

[0003] Therefore, providing a novel composite material mask device and a coated glass masking method has become a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0004] In order to solve the above-mentioned shortcomings and deficiencies, one object of the present invention is to provide a mask device made of a composite material.

[0005] Another object of the present invention is to provide a masking method for coated glass, which is achieved by using the masking device made of the composite material described above.

[0006] To achieve the above objectives, the present invention provides, in one aspect, a composite mask device, comprising a glass cover plate and a high-temperature-resistant polymer film, wherein the glass cover plate partially covers the high-temperature-resistant polymer film to form an overlapping region, and the front end of the high-temperature-resistant polymer film extends out of the overlapping region. In the composite mask device provided by the present invention, the glass cover plate partially covers the high-temperature-resistant polymer film, which is equivalent to allowing the high-temperature-resistant polymer film to extend from the front end of the glass cover plate. In this case, the thickness of the glass cover plate boundary can be reduced to the thickness of the high-temperature-resistant polymer film, thereby significantly reducing the width of the ghosting boundary during the masking process.

[0007] In a specific embodiment of the device described above, the high-temperature resistant polymer film has a temperature resistance exceeding 150°C and includes one or a combination of polytetrafluoroethylene film, polyetheretherketone film, polyimide (PI) film, and polyphenylene sulfide film. The high-temperature resistant polymer film used in the composite mask device provided by the present invention is resistant to high temperatures and has good thermal stability.

[0008] As a specific embodiment of the above device of the present invention, the flatness of the glass cover is less than 0.1 mm.

[0009] In a specific embodiment of the device described above, the glass cover plate is a completely flat glass, such as float glass or laminated glass formed from two float glass sheets. In the device of the present invention, if physically tempered glass (quenched tempered glass) or chemically tempered glass is used as the glass cover plate, the tempered glass or chemically tempered glass may be deformed due to heat treatment, resulting in a large gap between the masking device and the glass to be coated during the masking process, which may lead to an excessively wide ghosting boundary.

[0010] As a specific embodiment of the above device of the present invention, the thickness of the glass cover plate is 1 mm to 4 mm. In some embodiments of the present invention, the thickness of the glass cover plate can be, for example, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, and 4 mm.

[0011] In the device of the present invention, if the glass cover is too thick, it will be too heavy, and the heavy glass cover will compress the glass to be coated. If the glass cover is too thin, its strength will be too low, making the glass cover easier to break.

[0012] In the present invention, the area of ​​the glass cover is adjusted according to the glass to be coated and the coating area. As a specific embodiment of the above-mentioned device of the present invention, the area of ​​the glass cover is 0.1m 2 -1m 2 .

[0013] As a specific embodiment of the device described above, the glass cover plate is a glass cover plate that has been subjected to edge grinding. The purpose of edge grinding the glass cover plate is to remove cutting cracks to prevent the glass cover plate from being broken due to the presence of cutting cracks.

[0014] As a specific embodiment of the above-described device of the present invention, an electrostatic film is provided on the outer surface of the glass cover plate (i.e., the side facing away from the high-temperature-resistant polymer film). In the present invention, after using the device to mask the coated glass multiple times, the surface of the glass cover plate will be deposited with a thick layer of coating residue due to repeated coating, making the glass surface difficult to polish. After the outer surface of the glass cover plate is covered with a layer of electrostatic film, the coating residue will be deposited on the electrostatic film. Once the coating residue accumulates to a certain thickness, the electrostatic film can be directly replaced without residual adhesive, which greatly facilitates the glass cover plate residue cleaning process.

[0015] As a specific embodiment of the above-mentioned device of the present invention, the material of the electrostatic film includes PET.

[0016] As a specific embodiment of the above-mentioned device of the present invention, an anti-slip tape is provided on the inner surface of the glass cover plate (ie, the side of the glass cover plate in contact with the glass to be coated).

[0017] As a specific embodiment of the device described above, the thickness of the anti-slip tape does not exceed 1 mm, preferably 0.2-0.5 mm. In some specific embodiments of the present invention, the thickness of the anti-slip tape can be, for example, 0.2 mm, 0.3 mm, 0.4 mm, and 0.5 mm.

[0018] In one embodiment of the device described above, the anti-slip tape is made of a material with good elasticity and anti-slip properties, such as rubber. In some embodiments of the present invention, the anti-slip tape can be made of silicone rubber, for example. Thus, the masking device provided by the present invention, by providing the anti-slip tape on the inner surface of the glass cover, can prevent the glass cover from shifting during the masking process, thereby significantly reducing fluctuations in the film removal position.

[0019] As a specific embodiment of the above-mentioned device of the present invention, a convex structure is provided on the side of the anti-slip tape that contacts the glass to be coated.

[0020] In one embodiment of the device described above, the thickness of the high-temperature resistant polymer film is 0.08 mm to 0.15 mm. In some embodiments of the present invention, the thickness of the high-temperature resistant polymer film can be, for example, 0.08 mm, 0.1 mm, 0.12 mm, 0.14 mm, or 0.15 mm.

[0021] In the device of the present invention, if the heat-resistant polymer film is too thick, the width of the ghost boundary will be large during the masking process, while if it is too thin, the heat-resistant polymer film will easily curl and deform. Therefore, the masking device provided by the present invention can significantly reduce the width of the ghost boundary during the masking process by using a glass cover plate with a flatness of less than 0.1mm and controlling the thickness of the heat-resistant polymer film to 0.08mm-0.15mm.

[0022] In one embodiment of the device described above, the width of the high-temperature resistant polymer film is 8 mm to 15 mm. In some embodiments of the present invention, the width of the high-temperature resistant polymer film can be, for example, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, or 15 mm.

[0023] As a specific embodiment of the device described above in the present invention, a back adhesive layer is provided between the glass cover plate and the high-temperature resistant polymer film. In the device of the present invention, the back adhesive layer can be obtained by applying glue on the side of the high-temperature resistant polymer film that contacts the glass cover plate. On the one hand, the back adhesive layer can make the high-temperature resistant polymer film and the glass cover plate tightly bonded together. On the other hand, the back adhesive layer can also effectively adhere to the high-temperature resistant polymer film to avoid point defects caused by the high-temperature resistant polymer film falling onto the glass to be coated during the masking process. In addition, the present invention does not make specific requirements on the material of the glue used for the back adhesive layer. It can be reasonably selected according to the actual needs of the on-site operation, as long as it can ensure that the purpose of the present invention can be achieved.

[0024] In one embodiment of the device described above, the width of the overlap region between the glass cover plate and the high-temperature-resistant polymer film is 5 mm to 7 mm. The overlap region is the bonding area between the high-temperature-resistant polymer film and the glass cover plate. For example, in some embodiments of the present invention, the width of the overlap region can be 5 mm, 5.5 mm, 6 mm, 6.5 mm, or 7 mm.

[0025] In one embodiment of the device described above, the heat-resistant polymer film extends beyond the overlapped region (width of the extended portion) by 3 mm to 6 mm. For example, in some embodiments of the present invention, the heat-resistant polymer film extends beyond the overlapped region by 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, or 6 mm.

[0026] On the other hand, the present invention further provides a masking method for coated glass, wherein the method is implemented using the masking device of the composite material described above, comprising:

[0027] Step 1): Designing the shapes of the glass cover plate and the high-temperature resistant polymer film according to the shape of the film removal area and the requirements for cover plate positioning, and completing the assembly of the composite material mask device;

[0028] Step 2): placing the composite material mask device on the glass to be coated and performing a coating process on the glass to be coated;

[0029] Step 3): After the coating process is completed, the composite material mask device is removed to complete the coating and masking of the glass to be coated.

[0030] As a specific embodiment of the above method of the present invention, in step 2), the composite material mask device is placed on the glass to be coated using an automated cover plate paving device. This operation can significantly improve the position accuracy of the film removal area.

[0031] Compared with the prior art, the beneficial technical effects achieved by the present invention include:

[0032] The composite material mask device provided by the present invention adopts a combination of a glass cover plate and a high-temperature resistant polymer film. When the device is used to mask coated glass, the problems of easy deformation, large investment and large width of ghosting boundaries during the use of existing metal mask devices can be solved; compared with existing coating mask devices, the composite material mask device provided by the present invention has the advantages of reusability, environmental friendliness and low investment; compared with existing laser film removal devices, it has the advantages of low investment, high production frequency and no film residue; in addition, when the device is used to mask coated glass, the device can cover a large area and has no pollution to the coating atmosphere.

[0033] When the composite material mask device provided by the present invention is used for coating and masking, the ghost boundary can be less than 0.8 mm, except for the fluctuation of the film position, that is, the dimensional accuracy is not greater than ±0.5 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A top view of the composite material mask device provided in Example 1 of the present invention.

[0036] Figure 2 A side view of the composite material mask device provided in Example 1 of the present invention.

[0037] Figure 3for Figure 2 A partial enlarged view of area A in the middle.

[0038] Description of main figures:

[0039] 1. Glass cover;

[0040] 2. Polyimide film;

[0041] 3. Adhesive layer;

[0042] 4. Electrostatic film;

[0043] 5. Glass to be coated;

[0044] 6. Anti-slip tape. DETAILED DESCRIPTION

[0045] It should be noted that the term "comprise" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or apparatus.

[0046] In the present invention, terms such as "upper," "lower," "inner," "outer," "middle," "top," and "bottom" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended primarily to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to specific positions, or to their construction or operation in a specific orientation.

[0047] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0048] Furthermore, the terms "disposed" and "connected" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or it can be internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0049] The "range" disclosed in the present invention is given in the form of a lower limit and an upper limit. It can be one or more lower limits, and one or more upper limits respectively. A given range is defined by selecting a lower limit and an upper limit. The selected lower limit and upper limit define the boundaries of a particular range. All ranges defined in this way are combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, a range of 60-120 and 80-110 is listed for a particular parameter, and it is understood that a range of 60-110 and 80-120 is also expected. In addition, if the minimum range values ​​listed are 1 and 2, and the maximum range values ​​listed are 3, 4, and 5, then the following ranges can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5.

[0050] In the present invention, unless otherwise specified, the numerical range "ab" is an abbreviation for any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" are listed in this invention, and "0-5" is merely an abbreviation for these numerical combinations.

[0051] In the present invention, unless otherwise specified, all embodiments and preferred embodiments mentioned in the present invention can be combined with each other to form a new technical solution.

[0052] In the present invention, unless otherwise specified, all technical features and preferred features mentioned in the present invention can be combined with each other to form a new technical solution.

[0053] In the present invention, unless otherwise specified, all steps mentioned herein may be performed sequentially or randomly, but are preferably performed sequentially. For example, the method comprising steps (a) and (b) indicates that the method may comprise steps (a) and (b) performed sequentially, or may comprise steps (b) and (a) performed sequentially. For example, the method further comprising step (c) indicates that step (c) may be added to the method in any order, for example, the method may comprise steps (a), (b) and (c), or may comprise steps (a), (c) and (b), or may comprise steps (c), (a) and (b), etc.

[0054] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the attached table, drawings and examples. The following embodiments are some embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the examples, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0055] Example 1

[0056] This embodiment provides a composite material mask device, the structural diagram of which is shown in FIG. Figure 1-Figure 3 As shown, from Figure 1-Figure 3 As can be seen in the figure, the composite mask device includes a glass cover plate 1, a polyimide film 2, an adhesive layer 3, and an electrostatic film 4. The glass cover plate 1 is partially bonded to the polyimide film 2 through the adhesive layer 3 to form an overlapping area, and the front end of the polyimide film 2 extends out of the overlapping area.

[0057] The electrostatic film 4 is provided on the outer surface of the glass cover plate 1;

[0058] The inner surface of the glass cover plate 1 (i.e. the side of the glass cover plate 1 in contact with the glass to be coated 5) is provided with an anti-slip tape 6, and the side of the anti-slip tape 6 in contact with the glass to be coated 5 is provided with a convex structure;

[0059] The glass cover plate 1 is made of float glass and has been edge-milled. The thicknesses of the glass cover plate 1 and the polyimide film 2 are 2.1 mm and 0.1 mm, respectively. The width of the polyimide film 2 is 10 mm. The width of the overlapping area between the glass cover plate 1 and the polyimide film 2 is 5 mm, that is, half of the polyimide film 2 is covered by the glass cover plate 1. The protrusion of the polyimide film 2 relative to the overlapping area (the width of the protruding part) is 5 mm.

[0060] The material of the electrostatic film 4 is PET;

[0061] The anti-slip tape 6 is made of silicone rubber and has a thickness of no more than 1 mm.

[0062] The area of ​​the glass cover is 0.7m 2 .

[0063] To further illustrate the composite material mask device provided in this embodiment, this embodiment also uses the device to mask coated glass, including:

[0064] Step 1): According to the shape of the film removal area and the requirements for cover positioning, Figure 1-Figure 3 Design the shape of the glass cover and polyimide film, and complete the assembly of the composite material mask device;

[0065] Step 2): Attach the anti-slip tape to the inner surface of the glass cover (i.e., the side of the glass cover that contacts the glass to be coated), and position it on the side away from the polyimide film;

[0066] Step 3): Wash and dry the glass to be coated, and position the glass to be coated at the automatic cover plate loading station;

[0067] Step 4): Place the composite material mask device on the glass to be coated 5 using an automated cover plate paving device, and perform coating treatment on the glass to be coated after completing visual positioning and placement;

[0068] Step 5): After the coating process is completed, the composite material mask device is removed to complete the coating and masking of the glass to be coated.

[0069] Comparative Example 1

[0070] This comparative example provides a masking method for coated glass, which differs from Example 1 only in that this comparative example is implemented using a metal masking device, wherein the metal masking device includes a 2.5 mm thick 304 stainless steel plate and a 0.5 mm thick 304 stainless steel plate cover plate, wherein the 0.5 mm thick 304 stainless steel plate cover plate is 5 mm wider than the 2.5 mm thick 304 stainless steel plate, and the 2.5 mm thick 304 stainless steel plate is positioned on the 0.5 mm thick 304 stainless steel plate cover plate to form a 5 mm wide step between the two. The back of the 0.5 mm thick 304 stainless steel plate cover plate is also affixed with electrical tape for anti-slip purposes.

[0071] Comparative Example 2

[0072] This comparative example provides a masking method for coated glass, the steps of which are as follows:

[0073] Step 1): Design the printing screen according to the film removal area;

[0074] Step 2): Place the glass to be coated on the printing platform, center it, and print the coating mask;

[0075] Step 3): Transfer the glass to a tunnel curing furnace for curing;

[0076] Step 4): The solidified glass is transferred to a washing machine for washing and drying, and then transferred to a coating chamber for coating.

[0077] Step 5): After the coating is completed, the cured coating is removed to complete the mask.

[0078] Comparative Example 3

[0079] This comparative example provides a masking method for coated glass, the steps of which are as follows:

[0080] Step 1): After the entire glass is coated, it is transferred to the laser film removal station and positioned;

[0081] Step 2): Input the drawing of the area to be de-filmed into the infrared laser de-filming equipment;

[0082] Step 3): Use laser to remove the film according to the drawing.

[0083] The mask removal area data, position fluctuation data during the masking process, and ghost width / boundary data that can be obtained by the masking devices provided in the embodiments of the present invention and the comparative examples are shown in Table 1 below.

[0084] Table 1

[0085]

[0086]

[0087] As can be seen from Table 1, the composite material mask device provided in Example 1 of the present invention uses a glass cover plate with a thickness of 2.1 mm and a polyimide film with a thickness of 0.1 mm to mask the coated glass, achieving an area of ​​0.7 m 2 The mask removal has a dimensional accuracy of ±0.5mm and a ghosting boundary of less than 0.8mm.

[0088] It can also be seen from Table 1 that the composite material mask device provided in an embodiment of the present invention adopts a combination of a glass cover plate and a polyimide film. When the device is used to mask coated glass, it can solve the problems of easy deformation, high investment, and large ghosting boundary width after multiple operations (such as 50 times in Table 1) existing in the use of existing metal mask devices. Compared with existing coating mask devices, the composite material mask device provided by the present invention has the advantages of reusability, environmental friendliness, and low investment. Compared with existing laser film removal devices, it has the advantages of low investment, high production frequency, and no film residue. In addition, when the device is used to mask coated glass, the device can cover a large area and does not pollute the coating atmosphere.

[0089] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, substitutions of equivalent components, or equivalent changes and modifications made within the scope of patent protection, should still fall within the scope of this patent. Furthermore, the technical features of this invention may be freely combined with one another, with other technical inventions, and with other technical inventions.

Claims

1. A composite material mask device, characterized in that: The composite mask device includes a glass cover plate and a high-temperature resistant polymer film. The glass cover plate partially covers the high-temperature resistant polymer film to form an overlapping area, and the front end of the high-temperature resistant polymer film extends out of the overlapping area.

2. The device according to claim 1, characterized in that The high temperature resistant polymer film includes one or a combination of polytetrafluoroethylene film, polyetheretherketone film, polyimide film and polyphenylene sulfide film.

3. The device according to claim 1, characterized in that The flatness of the glass cover is less than 0.1 mm.

4. The device according to claim 3, characterized in that The glass cover plate is float glass or laminated glass formed by two pieces of float glass.

5. The device according to any one of claims 1 to 4, characterized in that: The thickness of the glass cover plate is 1 mm to 4 mm.

6. The device according to any one of claims 1 to 4, characterized in that: An electrostatic film is provided on the outer surface of the glass cover.

7. The device according to claim 6, characterized in that The material of the electrostatic film includes PET.

8. The device according to any one of claims 1 to 4, characterized in that The inner surface of the glass cover is provided with an anti-slip tape.

9. The device according to claim 8, characterized in that The thickness of the anti-slip tape does not exceed 1 mm.

10. The device according to claim 8, characterized in that The material of the anti-slip tape includes rubber.

11. The device according to claim 8, characterized in that The side of the anti-slip tape that contacts the glass to be coated is provided with a convex structure.

12. The device according to claim 1, characterized in that The thickness of the high temperature resistant polymer film is 0.08 mm to 0.15 mm.

13. The device according to claim 1 or 12, characterized in that A back adhesive layer is provided between the glass cover plate and the high temperature resistant polymer film.

14. The device according to claim 1, wherein The width of the overlapping area between the glass cover plate and the high temperature resistant polymer film is 5 mm to 7 mm.

15. The device according to claim 1 or 14, characterized in that The high temperature resistant polymer film extends outward from the overlapping area by 3 mm to 6 mm.

16. A masking method for coated glass, characterized in that: The method is implemented using the composite material mask device according to any one of claims 1 to 15, comprising: Step 1): Designing the shapes of the glass cover plate and the high-temperature resistant polymer film according to the shape of the film removal area and the requirements for cover plate positioning, and completing the assembly of the composite material mask device; Step 2): placing the composite material mask device on the glass to be coated and performing a coating process on the glass to be coated; Step 3): After the coating process is completed, the composite material mask device is removed to complete the coating and masking of the glass to be coated.

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