阅读说明：本技术 一种用于激光除膜的印刷组合物和夹层玻璃的制造方法 (Printing composition for laser film removal and method for manufacturing laminated glass ) 是由 屠乐乐 刘贤平 关金亮 王辉 陈志新 于 2020-11-18 设计创作，主要内容包括：本发明涉及玻璃产品领域,特别是安装在车辆上的窗玻璃,具体地提供一种用于激光除膜的印刷组合物和夹层玻璃的制造方法。该印刷组合物包括无机隔离颗粒、树脂添加剂、颜料和有机溶剂。本发明采用的印刷组合物能够在透明导电膜中形成除膜区域的过程中保护玻璃板或深色油墨层,在将除膜区域内的透明导电膜全部去除的同时,还避免玻璃板或深色油墨层在激光除膜过程中被破坏,而且具有良好的热传导性和耐热性,不会对平直玻璃板的加热软化和弯曲成型过程产生影响,能够得到型面质量好、光畸变小的镀膜玻璃,进一步改善了利用该印刷组合物制造的镀膜玻璃和夹层玻璃的反射变形、天线信号透过和相机光谱特性。(The invention relates to the field of glass products, in particular to a window glass installed on a vehicle, and particularly provides a printing composition for laser film removal and a manufacturing method of laminated glass. The printing composition includes inorganic spacer particles, a resin additive, a pigment, and an organic solvent. The printing composition adopted by the invention can protect the glass plate or the dark ink layer in the process of forming the film removing area in the transparent conductive film, can prevent the glass plate or the dark ink layer from being damaged in the process of laser film removing while completely removing the transparent conductive film in the film removing area, has good heat conductivity and heat resistance, can not influence the heating softening and bending forming processes of a straight glass plate, can obtain the coated glass with good profile quality and small optical distortion, and further improves the reflection deformation, antenna signal transmission and camera spectral characteristics of the coated glass and laminated glass manufactured by the printing composition.)

1. A printing composition for laser de-filming characterized by: comprises 60 to 70 percent of inorganic isolation particles, 7 to 15 percent of resin additive, 15 to 22 percent of pigment and 5 to 10 percent of organic solvent according to the mass percentage; the inorganic isolation particles comprise at least one of diatomite, crystalline silicon and quartz sand; the resin additive comprises an acrylate; the pigment comprises at least one of oxides of iron, copper, cobalt, nickel and manganese metals; the organic solvent includes at least one of benzophenone and isopropylthioxanthone.

2. The printing composition of claim 1, wherein: the inorganic spacer particles have a particle size of less than or equal to 2 microns.

3. The printing composition of claim 1, wherein: the printing composition can be printed onto the surface of a flat glass plate or a ceramic ink layer and cured to form a film-removing protective layer.

4. A printing composition according to claim 3, characterized in that: the temperature of the curing is less than or equal to 200 ℃.

5. A method for manufacturing laminated glass, the laminated glass comprises coated glass, an intermediate bonding layer and a second glass plate, the coated glass comprises a bent glass plate and a transparent conductive film, and at least one film removing area is arranged in the transparent conductive film, and the method is characterized by comprising the following steps:

step 1: preparing a flat glass plate, and arranging at least one film removing protective layer on the flat glass plate;

step 2: depositing a transparent conductive film on the surface of the flat glass plate provided with the film removing protection layer, wherein the transparent conductive film at least partially covers the film removing protection layer;

and step 3: carrying out high-temperature heat treatment at least 560 ℃ and bending forming on the flat glass plate with the transparent conductive film and the film removing protective layer to obtain a bent glass plate;

and 4, step 4: removing the transparent conductive film on the film removing protective layer on the curved glass plate by using a laser beam generated by a laser;

and 5: removing the film removing protective layer on the bent glass plate, and forming at least one film removing area in the transparent conductive film to obtain coated glass;

step 6: preparing a second glass plate and at least one intermediate bonding layer, and laminating the coated glass and the second glass plate through the at least one intermediate bonding layer to obtain the laminated glass.

6. The method for producing a laminated glass according to claim 5, characterized in that: the thickness of the film removing protective layer is 5-20 micrometers, the film removing protective layer in the step 1 is formed by printing the printing composition according to any one of claims 1-4 on the surface of a flat glass plate and curing, and the curing temperature is less than or equal to 200 ℃.

7. The method for producing a laminated glass according to claim 6, characterized in that: the printing composition comprises 60-70% of inorganic isolation particles, 7-15% of resin additive, 15-22% of pigment and 5-10% of organic solvent by mass percent; the inorganic isolation particles comprise at least one of diatomite, crystalline silicon and quartz sand; the resin additive comprises an acrylate; the pigment comprises at least one of oxides of iron, copper, cobalt, nickel and manganese metals; the organic solvent includes at least one of benzophenone and isopropylthioxanthone.

8. The method for producing a laminated glass according to claim 5, characterized in that: and step 1, arranging a dark color ink layer on the surface of the flat glass plate provided with the film removing protective layer.

9. The method for producing a laminated glass according to claim 8, characterized in that: the dark color ink layer is formed on the same surface of the flat glass plate before the film removing protective layer.

10. The method for producing a laminated glass according to claim 8, characterized in that: the thickness of the dark color ink layer is 15-40 microns, and the thickness of the dark color ink layer is larger than or equal to that of the film removing protective layer.

11. The method for producing a laminated glass according to claim 8, characterized in that: the bonding force between the dark color ink layer on the bent glass plate and the surface of the glass plate is greater than the bonding force between the dark color ink layer on the flat glass plate and the surface of the glass plate.

12. The method for producing a laminated glass according to claim 8, characterized in that: the transparent conductive film at least partially covers the dark ink layer.

13. The method for producing a laminated glass according to claim 12, characterized in that: at least part of at least one film removing protective layer is positioned on the dark ink layer, and the bonding force between the film removing protective layer on the bent glass plate and the surface of the dark ink layer is smaller than the bonding force between the film removing protective layer on the flat glass plate and the surface of the dark ink layer.

14. The method for producing a laminated glass according to claim 5, characterized in that: and 2, printing conductive silver paste on the surface of the transparent conductive film after the transparent conductive film is deposited on the surface of the flat glass plate.

15. The method for producing a laminated glass according to claim 5, characterized in that: the sheet resistance of the transparent conductive film on the curved glass plate is less than the sheet resistance of the transparent conductive film on the straight glass plate.

16. The method for producing a laminated glass according to claim 5, characterized in that: and the bonding force between the film removing protective layer on the bent glass plate and the surface of the glass plate is smaller than the bonding force between the film removing protective layer on the flat glass plate and the surface of the glass plate.

17. The method for producing a laminated glass according to claim 5, characterized in that: the laser is an infrared laser or a green laser, the infrared laser is used for generating laser beams with the wavelength of 1053nm or 1064nm, and the green laser is used for generating laser beams with the wavelength of 527nm or 532 nm.

18. The method for producing a laminated glass according to claim 5, characterized in that: the second glass plate is a bent glass plate formed by performing high-temperature heat treatment and bending forming on a straight glass plate at least 560 ℃, or a chemically-tempered straight glass plate with the thickness of less than or equal to 1.1mm, or a body-strengthened straight glass plate with the thickness of less than or equal to 1.1 mm.

19. The method for producing a laminated glass according to claim 18, characterized in that: the thickness of the coated glass is at least 0.7mm greater than that of the chemically tempered flat glass plate or the body-reinforced flat glass plate, and the chemically tempered flat glass plate or the body-reinforced flat glass plate is bonded with the coated glass through a cold forming process and is finally bent and formed.

The technical field is as follows:

the invention relates to the field of glass products, in particular to a window glass installed on a vehicle, and particularly provides a printing composition for laser film removal, a coated glass manufactured by using the printing composition, a laminated glass comprising the coated glass and a manufacturing method of the laminated glass.

Background art:

coated glass formed by depositing a transparent conductive film on a surface of a glass substrate using a Chemical Vapor Deposition (CVD) or Physical Vapor Deposition (PVD) technique has been widely used in vehicles and buildings, and such coated glass has an electrical heating function and/or a heat insulating function based on good electrical conductivity and infrared ray reflecting property of a metal layer, a metal alloy layer or a transparent conductive oxide layer in a transparent conductive film, and can achieve applications such as defrosting and defogging, solar control (sun or sun shielding), low radiation, etc., for example, chinese patents CN1093346A, CN1108862A, CN101304955A, CN111247108A, CN104039732B, CN107709265A, CN107810170A and CN 111566063A.

When the coated glass is applied to a vehicle, especially used as a front windshield, electronic devices such as ETC (electronic toll collection system), RFID (radio frequency identification), rain sensor, camera and laser radar are generally arranged on one side of the glass, which is positioned in the vehicle, and wireless data exchange between the electronic devices and the outside of the vehicle is affected because the transparent conductive film has shielding effect on electromagnetic waves, wherein the ETC system realizes data exchange by bidirectional communication between an on-board unit (OBU) installed on the inner surface of the front windshield and a Road Side Unit (RSU) installed on a lane of a toll station, and a film removing area (i.e. a transparent conductive film-free area) is required to be arranged in the transparent conductive film as a data window, for example, patent EP1274597B1 discloses that at least two spaced data transmission windows (i.e. a transparent conductive layer-free area) are arranged in the transparent conductive layer, also for example patent US6559419 discloses the provision of a coating removal zone in the heatable coating for easy signal transmission and/or reception as toll devices and/or rain sensors, and patents CN102474912A, CN102450093A, CN102640562A and CN106797679B all also disclose the provision of one or two transparent zones in the conductive coating without conductive coating as data transmission windows.

In order to form a transparent conductive film-free region in a transparent conductive film as a data transmission window, the transparent conductive film can be formed by a cover plate mask when the transparent conductive film is deposited on the surface of a glass substrate, or can be formed by mechanical stripping, chemical ablation and/or laser film removal after the transparent conductive film is deposited on the surface of the glass substrate, and the patent US5131967 discloses that the peripheral part of the transparent conductive film on the surface of the glass substrate is removed by laser, and the film removal time and the power level of the laser are required to be controlled in order to avoid the laser damaging the glass substrate; patent EP2325002B1 discloses the use of a laser to remove a localized metal coating on a PET film to form a peel-off region in which at least 80% by weight, preferably at least 90% by weight, of the original metal coating is removed, that is, the metal coating in the peel-off region may not be completely removed.

At present, window glass installed on vehicles is composed of 1 or 2 curved glass plates, which are generally formed by heating softened flat glass plates through a gravity bending process or a press bending process, the flat glass plates being heated mainly in a heating furnace by heat radiation to the glass surface through heating elements; whereas transparent conductive films have a higher reflection and a lower absorption of thermal radiation than glass plates, if the transparent conductive film on the flat glass plate is formed into the non-transparent conductive film region before being heated and bent, in the subsequent process of being heated and softened, the temperature of the region without the transparent conductive film on the flat glass plate is higher than that of the region covered with the transparent conductive film, even the temperature gradient of dozens or hundreds of degrees centigrade is formed in different regions of the flat glass plate, so that the dynamic difference exists in the subsequent bending forming process, the finally obtained bent glass plate has local optical distortion, in particular, the transparent-film-free region and the boundary region thereof are more conspicuous, and therefore, there is a possibility that the shape matching with the design is poor, the perspective deformation is generated in the visual field region, and the image obtained by the camera through the transparent-film-free region cannot meet the requirements.

In order to solve the problems of the above-mentioned process of forming a non-transparent conductive film region in a transparent conductive film and then softening the non-transparent conductive film region by heating, bending and molding a flat glass plate into a bent glass plate and then forming a non-transparent conductive film region in a transparent conductive film on the bent glass plate, for example, patent CN108124434A discloses a method for manufacturing a structured functional coating of a glass layer, wherein some parts of the functional coating on the bent glass layer are ablated by laser burning, and the functional coating is applied after the glass plate is bent, and the functional coating has the disadvantages of low coating efficiency, single film system structure, incapability of meeting the requirements of automobile-grade use, and the like; aiming at the condition that a transparent conductive film is deposited on the surface of a flat glass plate and then is heated, bent and formed to form a region without the transparent conductive film, the transparent conductive film and the flat glass plate are subjected to high temperature of at least 560 ℃ or even more than 600 ℃, partial film layers of the transparent conductive film interact with the surface of the glass plate at high temperature, which shows that partial film layers of the transparent conductive film are combined with the surface of the glass plate or even permeate, for a ceramic ink layer with larger surface roughness, the transparent conductive film deposited on the surface of the transparent conductive film is combined with the surface of the ceramic ink layer firmly or permeates deeply at high temperature, so that the transparent conductive film in the region to be used as a data transmission window cannot be completely removed, the defects of visible light transmittance reduction, higher haze, whitish appearance and even shadow are caused, and if the transparent conductive film is required to be completely removed, the glass plate or ceramic ink layer must be damaged.

The invention content is as follows:

the invention aims to solve the technical problem that when a transparent conductive film is deposited on the surface of a flat glass plate and is heated and bent to form a transparent conductive film-free area by utilizing a laser film removing technology, the defects that a local transparent conductive film cannot be completely removed or a glass plate and a ceramic ink layer are inevitably damaged exist, and the like, and provides coated glass and laminated glass thereof, and also provides a printing composition for laser film removal and a manufacturing method of the laminated glass.

The technical scheme adopted by the invention for solving the technical problems is as follows: a coated glass comprising a curved glass plate and a transparent conductive film deposited on at least one surface of the curved glass plate, at least one film removing region provided in the transparent conductive film, the film removing region not being covered with the transparent conductive film, characterized in that: the transparent conductive film comprises at least one metal layer and/or metal alloy layer, the bent glass plate and the transparent conductive film are obtained by subjecting a straight glass plate deposited with the transparent conductive film to high-temperature heat treatment at least 560 ℃ and bending forming, the visible light transmittance of the bent glass plate minus the visible light transmittance of the film removing area is less than or equal to 5%, and the haze of the film removing area minus the haze of the bent glass plate is less than or equal to 2%.

Preferably, the metal layer is gold, silver, copper, aluminum or molybdenum, and the metal alloy layer is silver alloy.

Preferably, the number of metal particles of said metal layer and/or metal alloy layer in said film-removal region is equal to 0.

Preferably, the transparent conductive film comprises at least one silver layer and/or silver alloy layer, each silver layer or silver alloy layer is positioned between at least two dielectric layers, and the material of the dielectric layers is selected from at least one of oxides of elements such as zinc, magnesium, tin, titanium, niobium, zirconium, nickel, indium, silicon, aluminum, cerium, tungsten, molybdenum, antimony and bismuth, and/or at least one of nitrides and oxynitrides of elements such as silicon, aluminum, zirconium, yttrium, cerium and lanthanum, and mixtures thereof.

Preferably, the sheet resistance of the transparent conductive film on the curved glass plate is 0-32% smaller than that of the transparent conductive film on the flat glass plate.

Preferably, the visible light transmission of the bent glass sheet minus the visible light transmission of the film-removed region is less than or equal to 1%, and the haze of the film-removed region minus the haze of the bent glass sheet is less than or equal to 0.4%.

Preferably, the visible light transmittance of the bent glass sheet minus the visible light transmittance of the film-removed region is equal to 0, and the haze of the film-removed region minus the haze of the bent glass sheet is equal to 0.

Preferably, a dark color ink layer is further disposed on the surface of the curved glass plate deposited with the transparent conductive film, the transparent conductive film at least partially covers the dark color ink layer, and at least part of at least one film removing region is located in the transparent conductive film on the dark color ink layer.

More preferably, the number of metal particles of the metal layer and/or metal alloy layer within the dark ink layer is equal to 0.

Preferably, the visible light transmittance of the dark ink layer is less than or equal to 1.5%, the ultraviolet transmittance is less than or equal to 0.05%, and the material of the dark ink layer is ceramic ink or ultraviolet drying ink.

The invention also provides laminated glass comprising the coated glass, and the laminated glass further comprises an intermediate bonding layer and a second glass plate, wherein the intermediate bonding layer bonds the coated glass and the second glass plate together.

Preferably, the transparent conductive film is in direct contact with the intermediate adhesive layer.

Preferably, the laminated glass further comprises a first bus bar and a second bus bar which are in direct electrical contact with the transparent conductive film, a power supply inputs current into the transparent conductive film through the first bus bar and the second bus bar, and the power supply can provide a power supply voltage of 12-60V.

Preferably, the first bus bar and the second bus bar are conductive silver paste and/or metal foil, and the metal foil is gold foil, silver foil, copper foil or aluminum foil.

Preferably, the second glass plate is formed by subjecting a flat glass plate to high-temperature heat treatment at least 560 ℃ and bending forming, or is a chemically-tempered glass plate with the thickness of less than or equal to 1.1mm, or is a body-strengthened flat glass plate with the thickness of less than or equal to 1.1 mm.

Preferably, a dark ink layer is arranged on the coated glass, at least part of the dark ink layer forms a dot-shaped ink dispersion area, a transparent conductive film in the dot-shaped ink dispersion area partially covers the dark ink layer and partially covers the surface of the curved glass plate, and at least one film removing area is located in the dot-shaped ink dispersion area.

The invention also provides a printing composition for laser film removal, which is characterized in that: comprises 60 to 70 percent of inorganic isolation particles, 7 to 15 percent of resin additive, 15 to 22 percent of pigment and 5 to 10 percent of organic solvent according to the mass percentage; the inorganic isolation particles comprise at least one of diatomite, crystalline silicon and quartz sand; the resin additive comprises an acrylate; the pigment comprises at least one of oxides of iron, copper, cobalt, nickel and manganese metals; the organic solvent includes at least one of benzophenone and isopropylthioxanthone.

Preferably, the inorganic spacer particles have a particle size of less than or equal to 2 microns.

Preferably, the printing composition is capable of being printed onto the surface of a flat glass plate or a ceramic ink layer and cured to form a protective film removal layer.

More preferably, the temperature of the curing is less than or equal to 200 ℃.

The invention also provides a method for manufacturing laminated glass, which comprises the following steps of:

step 1: preparing a flat glass plate, and arranging at least one film removing protective layer on the flat glass plate;

step 2: depositing a transparent conductive film on the surface of the flat glass plate provided with the film removing protection layer, wherein the transparent conductive film at least partially covers the film removing protection layer;

and step 3: carrying out high-temperature heat treatment at least 560 ℃ and bending forming on the flat glass plate with the transparent conductive film and the film removing protective layer to obtain a bent glass plate;

and 4, step 4: removing the transparent conductive film on the film removing protective layer on the curved glass plate by using a laser beam generated by a laser;

and 5: removing the film removing protective layer on the bent glass plate, and forming at least one film removing area in the transparent conductive film to obtain coated glass;

step 6: preparing a second glass plate and at least one intermediate bonding layer, and laminating the coated glass and the second glass plate through the at least one intermediate bonding layer to obtain the laminated glass.

Preferably, the thickness of the film removing protective layer is 5-20 micrometers, the film removing protective layer in the step 1 is formed by printing the printing composition on the surface of a flat glass plate and curing, and the curing temperature is less than or equal to 200 ℃.

More preferably, the printing composition comprises 60-70% of inorganic spacer particles, 7-15% of resin additives, 15-22% of pigments and 5-10% of organic solvents by mass percentage; the inorganic isolation particles comprise at least one of diatomite, crystalline silicon and quartz sand; the resin additive comprises an acrylate; the pigment comprises at least one of oxides of iron, copper, cobalt, nickel and manganese metals; the organic solvent includes at least one of benzophenone and isopropylthioxanthone.

Preferably, in step 1, a dark ink layer is further disposed on the surface of the flat glass plate on which the film removing protective layer is disposed.

More preferably, the dark ink layer is formed on the same surface of the flat glass sheet prior to the film removal protective layer.

More preferably, the thickness of the dark color ink layer is 15-40 microns, and the thickness of the dark color ink layer is larger than or equal to that of the film removing protective layer.

More preferably, the bonding force between the dark ink layer on the curved glass plate and the surface of the glass plate is greater than the bonding force between the dark ink layer on the flat glass plate and the surface of the glass plate.

More preferably, the transparent conductive film at least partially covers the dark ink layer.

Furthermore, at least part of at least one film removing protective layer is positioned on the dark ink layer, and the bonding force between the film removing protective layer on the bent glass plate and the surface of the dark ink layer is smaller than the bonding force between the film removing protective layer on the flat glass plate and the surface of the dark ink layer.

Preferably, after the transparent conductive film is deposited on the surface of the flat glass plate in step 2, a conductive silver paste is further printed on the surface of the transparent conductive film.

Preferably, the sheet resistance of the transparent conductive film on the curved glass plate is smaller than the sheet resistance of the transparent conductive film on the flat glass plate.

Preferably, the bonding force between the film removing protective layer on the bent glass plate and the surface of the glass plate is smaller than the bonding force between the film removing protective layer on the flat glass plate and the surface of the glass plate.

Preferably, the laser is an infrared laser for generating a laser beam with a wavelength of 1053nm or 1064nm or a green laser for generating a laser beam with a wavelength of 527nm or 532 nm.

Preferably, the second glass plate is a bent glass plate formed by subjecting a flat glass plate to high-temperature heat treatment at least 560 ℃ and bending forming, or is a chemically-tempered flat glass plate with the thickness of less than or equal to 1.1mm, or is a body-strengthened flat glass plate with the thickness of less than or equal to 1.1 mm.

More preferably, the thickness of the coated glass is at least 0.7mm greater than the thickness of the chemically tempered flat glass plate or the body-strengthened flat glass plate, and the chemically tempered flat glass plate or the body-strengthened flat glass plate is bonded with the coated glass through a cold forming process and finally bent.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the printing composition for laser film removal can protect the glass plate or the dark ink layer in the process of forming the film removal area in the transparent conductive film, can prevent the glass plate or the dark ink layer from being damaged in the process of laser film removal while completely removing the transparent conductive film in the film removal area, has good heat conductivity and heat resistance, does not influence the heating softening and bending forming processes of a straight glass plate, can obtain coated glass with good profile quality and small optical distortion, and further improves the reflection deformation, antenna signal transmission and camera spectral characteristics of the coated glass and laminated glass manufactured by the printing composition.

Description of the drawings:

FIG. 1 is a schematic top view of a coated glass according to the present invention;

FIG. 2 is a schematic cross-sectional view of a coated glass according to the present invention;

FIG. 3 is an enlarged partial view of a portion of a dark ink layer having a film removal area in accordance with the present invention;

FIG. 4 is a schematic partial cross-sectional view of a dark ink layer having a film removal area in accordance with the present invention;

FIG. 5 is a schematic cross-sectional view of a laminated glass according to the present invention;

FIG. 6a is a partial cross-sectional view of a curved glass sheet according to the present invention having a transparent conductive film and a film removal protective layer on the surface thereof;

FIG. 6b is a schematic diagram of the bent glass plate of FIG. 6a after the transparent conductive film on the film removing protective layer is removed;

FIG. 6c is a schematic structural diagram of the coated glass after the film removing protective layer on the bent glass plate in FIG. 6b is removed;

FIG. 7a is a partial cross-sectional view of a dark ink layer having a transparent conductive film and a resist layer thereon in accordance with the present invention;

FIG. 7b is a schematic diagram of the structure of FIG. 7a after the transparent conductive film on the protection layer is removed;

fig. 7c is a schematic structural view of the coated glass after the film removing protection layer on the dark ink layer in fig. 7b is removed.

The specific implementation mode is as follows:

the invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, the coated glass 100 according to the present invention includes a curved glass plate 1 and a transparent conductive film 2, the transparent conductive film 2 is deposited on at least one surface of the curved glass plate 1, at least one film removing region 101 is disposed in the transparent conductive film 2, and the film removing region 101 is used as a transmission window of wireless data of an electronic device, such as a rain sensor, a camera, a laser radar, an ETC antenna, an RFID antenna, etc., capable of passing through the coated glass 100 without hindrance. In fig. 1, the present invention specifically shows four film removing regions 101, wherein two substantially parallelogram-shaped film removing regions 101 may serve as ETC antenna data windows, a middle substantially trapezoidal film removing region 101 may serve as a camera data window, and a lower substantially circular film removing region 101 may serve as a rain sensor data window. Wherein at least part of the boundaries of the film removing regions 101 are defined by the transparent conductive film 2, and the four peripheral boundaries of the four film removing regions 101 in fig. 1 are defined by the transparent conductive film 2; of course, when the partial film removing region 101 is close to the outer boundary of the transparent conductive film 2, the film removing region 101 may be in a notch shape close to the outer boundary of the transparent conductive film 2, that is, three sides of the film removing region 101 are defined by the transparent conductive film 2, and the other side coincides with the outer boundary of the transparent conductive film 2.

In the present invention, the transparent conductive film 2 can be electrically heated to defrost and demist, control sunlight (sun or sun protection), and/or reduce radiation, and specifically includes at least one metal layer and/or metal alloy layer, the metal layer may be gold (Au), silver (Ag), copper (Cu), aluminum (Al), or molybdenum (Mo), and the metal alloy layer may be silver alloy, such as silver-gold alloy, silver-indium alloy, silver-copper alloy, etc.; preferably, the transparent conductive film 2 includes at least one silver layer and/or silver alloy layer, each silver layer or silver alloy layer is located between at least two dielectric layers, and the material of the dielectric layers is selected from at least one of oxides of elements such as zinc (Zn), magnesium (Mg), tin (Sn), titanium (Ti), niobium (Nb), zirconium (Zr), nickel (Ni), indium (In), silicon (Si), aluminum (Al), cerium (Ce), tungsten (W), molybdenum (Mo), antimony (Sb), and bismuth (Bi), and/or at least one of nitrides and oxynitrides of elements such as silicon (Si), aluminum (Al), zirconium (Zr), yttrium (Y), cerium (Ce), and lanthanum (La), and mixtures thereof. The transparent conductive film 2 can be directly deposited on the surface of the flat glass plate by a Chemical Vapor Deposition (CVD) or physical vapor deposition (CVD), for example, by magnetron sputtering, and the flat glass plate deposited with the transparent conductive film 2 is heated and softened and then bent to form the coated glass 100 of the present invention; the temperature of the heating softening is higher than or equal to 560 ℃, for example, higher than 600 ℃, the bending forming is a gravity bending forming process or a pressing bending forming process of the automobile glass, the density of the transparent conductive film 2 can be changed in the high-temperature heating softening process, so that the sheet resistance of the transparent conductive film 2 becomes small, namely the sheet resistance of the transparent conductive film 2 on the bent glass plate 1 is 0-32% smaller than that of the transparent conductive film on the flat glass plate, more preferably 10-30% smaller, for example, the sheet resistance of the transparent conductive film 2 after being deposited on the surface of the flat glass plate is 1.0 Ω/mouth, and after the heating softening and bending forming, the sheet resistance of the transparent conductive film 2 on the bent glass plate 1 is 0.8 Ω/mouth.

In fig. 1, the transparent conductive film 2 covers a large area of the curved glass plate 1, and in order to protect the peripheral portion of the transparent conductive film 2 from corrosion, it is preferable that the peripheral portion of the transparent conductive film 2 is set back inward by a distance of, for example, 1.5mm to 20mm from the peripheral portion of the curved glass plate 1.

In order to ensure that communication data, image data, sensor data and the like pass through the film removing region 101 without obstacles, the film removing region 101 is not covered with a transparent conductive film, that is, the transparent conductive film in the film removing region 101 is completely removed by using a laser film removing technology, the number of metal particles of the metal layer and/or the metal alloy layer in the film removing region 101 is preferably equal to 0, so as to ensure that the film removing region 101 does not have any weakening effect on data transmission; and without damaging the surface of the bent glass sheet 1, preferably the visible light transmission of the bent glass sheet 1 minus the visible light transmission of the film removed areas 101 is less than or equal to 5%, more preferably less than or equal to 3%, most preferably less than or equal to 1% or even equal to 0, for example the visible light transmission of the bent glass sheet 1 is 88.4%, the visible light transmission of the film removed areas 101 is 85.9%; while it is preferred that the haze of the film removal area 101 minus the haze of the curved glass sheet 1 is less than or equal to 2%, more preferably less than or equal to 0.85%, and most preferably less than or equal to 0.4% or even equal to 0, e.g., the haze of the curved glass sheet 1 is 0.07%, and the haze of the film removal area 101 is 1.15%; further improving reflection distortion, antenna signal transmission and camera spectral characteristics. The haze refers to the loss due to scattering of light, and generally refers to the ratio of the scattered fraction of light (scattering fraction or Td) to the light directly transmitted through the glazing (TL), expressed as a percentage.

As shown in fig. 3 and 4, a dark ink layer 3 is further disposed on the surface of the curved glass plate 1 deposited with the transparent conductive film 2, and is mainly used for shielding parts in a vehicle, so as to ensure consistent color around the coated glass 100, improve the overall appearance and block solar radiation, prevent aging of the parts in the vehicle, and improve the stability and service life of the product; the transparent conductive film 2 at least partially covers the dark color ink layer 3, at least part of at least one film removing area 101 is positioned in the transparent conductive film on the dark color ink layer 3, the transparent conductive film in the film removing area 101 on the dark color ink layer 3 is completely removed by using a laser film removing technology, and preferably, the number of metal particles of the metal layer and/or the metal alloy layer in the dark color ink layer 3 is equal to 0, so that the film removing area 101 is ensured not to generate any weakening influence on data transmission; the dark ink layer 3 generally surrounds the periphery of the curved glass sheet 1, forming a substantially annular opaque shaded region. When the bent glass plate 1 is used for forming a front windshield, a dark ink layer 3 is also arranged in a T-shaped area of the bent glass plate 1 corresponding to ADAS electronic equipment such as a camera, a laser radar and a rain sensor; the dark ink layer 3 of the T-shaped area can form an opaque shielding area, can also form a dot-shaped ink dispersion area, and can also form an opaque shielding area on one part and a dot-shaped ink dispersion area on the other part; in the dot-shaped ink spreading region, the transparent conductive film 2 partially covers the dark ink layer 3 and partially covers the surface of the curved glass plate 1, and at least one film removing region 101 is located in the dot-shaped ink spreading region.

Preferably, the visible light transmittance of the dark ink layer 3 is less than or equal to 1.5%, the ultraviolet transmittance is less than or equal to 0.05%, and the material of the dark ink layer 3 can be ceramic ink or ultraviolet drying ink (also called UV ink); the ceramic ink can be formed on the surface of a flat glass plate by means of plane printing and the like, then is subjected to high-temperature heat treatment at least 560 ℃ and bending forming together with the flat glass plate, and finally is sintered and formed on the surface of the bent glass plate to obtain the dark ink layer 3; the ultraviolet ray drying ink can be formed on the surface of a bent glass plate subjected to high-temperature heat treatment of at least 560 ℃ and bending forming by means of curved surface printing or the like, and then dried and fixed on the surface of the bent glass plate by means of ultraviolet rays of 200 ℃ or lower to obtain the dark color ink layer 3. In order to make the dark ink layer 3 more beautiful and easier to match, the color of the dark ink layer 3 is preferably black or brown.

The coated glass 100 can be used in a single piece and can be used to form a laminated glass, and the present invention also provides a laminated glass comprising the coated glass, as shown in fig. 5, the laminated glass comprises the coated glass 100, an intermediate bonding layer 4 and a second glass plate 5, wherein the intermediate bonding layer 4 bonds the coated glass 100 and the second glass plate 5 together.

When the coated glass 100 is used as an outer glass plate, the transparent conductive film 2 is in direct contact with the intermediate bonding layer 4, that is, the transparent conductive film 2 is located on the second surface of the laminated glass; when the coated glass 100 is used as an inner glass plate, preferably, the transparent conductive film 2 is in direct contact with the intermediate bonding layer 4, that is, the transparent conductive film 2 is located on the third surface of the laminated glass; when the coated glass 100 is used as an inner glass plate, the transparent conductive film 2 may also be away from the intermediate bonding layer 4, that is, the transparent conductive film 2 is located on the fourth surface of the laminated glass; typically, the first surface of the laminated glass is in contact with the air outside the vehicle and the fourth surface of the laminated glass is in contact with the air inside the vehicle.

In fig. 5, the laminated glass further includes a first bus bar 6 and a second bus bar 7 in direct electrical contact with the transparent conductive film 2, a power supply (not shown) can input current into the transparent conductive film 2 through the first bus bar 6 and the second bus bar 7, and the transparent conductive film 2 generates heat and generates heat under the action of the current, so that the temperature of the laminated glass is increased to achieve the functions of defrosting and defogging. The power supply can provide 12-60V power supply voltage to meet the use requirements of fuel automobiles, electric automobiles and the like; generally, the first bus bar 6 and the second bus bar 7 are arranged along two pairs of both sides of the laminated glass and substantially parallel to each other to form a uniform electric heating area therebetween. The first bus bar 6 and the second bus bar 7 are preferably conductive silver paste, and can be directly printed on the transparent conductive film 2 by screen printing or the like; of course, the first bus bar 6 and the first bus bar 7 may also be metal foils, and the metal foils may be specifically gold foils, silver foils, copper foils, aluminum foils, or the like; first busbar 6 with second busbar 7 can also choose for use simultaneously conductive silver thick liquid and metal foil, first conductive silver thick liquid direct printing on transparent conductive film 2, then fix the metal foil through modes such as pasting on the conductive silver thick liquid, preferentially the width of conductive silver thick liquid is greater than or equal to the width of metal foil.

The intermediate adhesive layer 4 is used to bond and fix the coated glass 100 and the second glass plate 5 together, and for example, Polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA), Polyacrylate (PA), polymethyl methacrylate (PMMA), Polyurethane (PUR), or the like may be used. Of course, the intermediate adhesive layer 4 may also have other functions such as providing at least one colored region for a shadow band to reduce interference of sunlight with human eyes or adding an infrared ray absorber to have a sun-screening or heat-insulating function, and for example, the intermediate adhesive layer 4 may further include at least two layers, one of which has a higher plasticizer content to have a sound-insulating function, or one of which has a wedge shape to have a head-up display (HUD) function, or the like.

In the invention, the second glass plate 5 is preferably a bent glass plate formed by subjecting a straight glass plate to high-temperature heat treatment at least 560 ℃ and bending forming, or is a chemically-tempered straight glass plate with the thickness of less than or equal to 1.1mm, or is a body-strengthened straight glass plate with the thickness of less than or equal to 1.1 mm; the thickness of the chemically tempered flat glass plate or the body-strengthened flat glass plate is at least 0.7mm smaller than that of the coated glass 100. Meanwhile, a dark ink layer is also arranged on at least one surface of the second glass plate 5 so as to form a shielding area on the inner side of the vehicle and protect parts in the vehicle, and the dark ink layer can also be used for improving the local adhesiveness.

In order to obtain the laminated glass, the invention also provides a method for manufacturing the laminated glass, wherein the laminated glass comprises a transparent conductive film 2, and at least one film removing area 101 is arranged in the transparent conductive film 2, and the method is characterized by comprising the following steps:

step 1: preparing a flat glass plate, and arranging at least one film removing protective layer 8 on the flat glass plate;

according to the position of each film removing area 101 in the laminated glass, arranging the film removing protective layer 8 on the corresponding area on the surface of the flat glass plate, wherein each film removing protective layer 8 corresponds to the position of each film removing area 101 one by one, and the film removing protective layer 8 is used for protecting the glass surface or the dark ink surface when the transparent conductive film 2 in each film removing area 101 is completely removed by using a laser film removing technology; when at least part of at least one film removing area 101 is positioned on the dark color ink layer 3, at least part of at least one film removing protective layer 8 is correspondingly positioned on the dark color ink layer 3; the film removing protective layer 8 is formed by printing a printing composition for laser film removal on the surface of a straight glass plate or the surface of the dark ink layer and curing, wherein the curing temperature is less than or equal to 200 ℃, and the printing composition comprises 60-70% of inorganic isolation particles, 7-15% of resin additives, 15-22% of pigments and 5-10% of organic solvents in percentage by mass.

The inorganic isolation particles have good thermal conductivity and heat resistance and are used for protecting a glass surface or a dark ink surface from being damaged by laser, the particle size of the inorganic isolation particles is preferably less than or equal to 2 micrometers, and the inorganic isolation particles comprise at least one of diatomite, crystalline silicon and quartz sand; the resin additive is used for adjusting the curing efficiency and improving the bonding force between the inorganic isolation particles and the glass surface or the dark color ink surface, and can be carbonized in the high-temperature heat treatment process at least 560 ℃, so that the bonding between the film removing protective layer 8 and the glass surface or the dark color ink surface is broken, and the film removing protective layer 8 can be rapidly cleaned after laser film removal, and the resin additive preferably comprises acrylate; the pigment is used for stabilizing heat conduction performance and plays a role in shielding and providing color, and preferably, the pigment comprises at least one of oxides of metals such as iron (Fe), copper (Cu), cobalt (Co), nickel (Ni), manganese (Mn) and the like; the organic solvent is used to adjust the viscosity and fluidity of the printing composition, and preferably the organic solvent includes at least one of benzophenone (C13H10O) and isopropylthioxanthone (C16H14 OS).

Preferably, a dark color ink layer 3 is further disposed on the surface of the flat glass plate provided with the film removing protective layer 8, the dark color ink layer 3 can be formed on the surface of the flat glass plate by means of plane printing or the like, the dark color ink layer 3 can be formed on the same surface of the flat glass plate before the film removing protective layer 8, can also be formed on the same surface of the flat glass plate after the film removing protective layer 8, and even can be formed on the same surface of the flat glass plate simultaneously with the film removing protective layer 8; when at least part of at least one film removing area 101 is positioned on the dark color ink layer 3, the dark color ink layer 3 is formed on the same surface of the flat glass plate before the film removing protective layer 8, and then at least part of at least one film removing protective layer 8 is correspondingly arranged on the dark color ink layer 3. According to the invention, for example, the deep color ink layer 3 is formed on the same surface of the flat glass plate before the film removing protective layer 8, the deep color ink layer 3 is printed on the surface of the flat glass plate in a plane printing mode, the deep color ink layer 3 is presintered and cured, then the film removing protective layer 8 is printed on the same surface of the flat glass plate in an area corresponding to the film removing area 101 through a screen printing process, and the film removing protective layer 8 is dried and cured; preferably, the thickness of the dark color ink layer 3 is 15-40 micrometers, the thickness of the film removing protective layer 8 is 5-20 micrometers, and the thickness of the dark color ink layer 3 is larger than or equal to that of the film removing protective layer 8.

Step 2: depositing a transparent conductive film 2 on the surface of the flat glass plate provided with the film removing protection layer 8, wherein the transparent conductive film 2 at least partially covers the film removing protection layer 8;

when the surface of the flat glass plate, which is provided with the film removing protective layer 8, is also provided with the dark color ink layer 3, the transparent conductive film 2 at least partially covers the dark color ink layer 3;

the transparent conductive film 2 can be deposited directly on the surface of the flat glass plate by a Chemical Vapor Deposition (CVD) or physical vapor deposition (CVD) method, for example by magnetron sputtering; if the transparent conductive film 2 is also used for electric heating to realize functions of defrosting, demisting and the like, after the transparent conductive film 2 is deposited on the surface of the flat glass plate, conductive silver paste is also printed on the surface of the transparent conductive film 2 to form a first bus bar 6 and a second bus bar 7, and a power supply can input current into the transparent conductive film 2 through the first bus bar 6 and the second bus bar 7;

in order to protect the four peripheral portions of the transparent conductive film 2 from corrosion, after the transparent conductive film 2 is deposited on the entire surface of the flat glass plate, the four peripheral portions of the transparent conductive film are removed by mechanical peeling, chemical ablation, laser film removal, or the like, and the removed width is 1.5mm to 20 mm.

And step 3: carrying out high-temperature heat treatment at least 560 ℃ and bending forming on the flat glass plate with the transparent conductive film 2 and the film removing protective layer 8 to obtain a bent glass plate 1;

as shown in fig. 6a, the surface of the bent glass plate 1 is provided with a transparent conductive film 2 and a film removing protective layer 8 which are subjected to high temperature heat treatment of at least 560 ℃ and bending forming together; as shown in fig. 7a, the surface of the bent glass plate 1 is also provided with a dark ink layer 3 which is subjected to high-temperature heat treatment at least 560 ℃ and bending forming; the high-temperature heat treatment and bending forming at least 560 ℃ can be exemplified by a bending production process such as baking bending or tempering of automobile glass.

During the high-temperature heat treatment at least 560 ℃, the flat glass plate is heated and softened for bending forming; the density of the transparent conductive film 2 per se can be changed, so that the sheet resistance of the transparent conductive film is reduced, namely the sheet resistance of the transparent conductive film 2 on the bent glass plate 1 is smaller than that of the transparent conductive film 2 on the straight glass plate; and carbonizing the resin additive in the film removing protective layer 8, and breaking the bonding between the film removing protective layer 8 and the glass surface or the surface of the deep color ink to reduce the bonding force between the film removing protective layer 8 and the glass surface or the surface of the deep color ink layer on the bent glass plate 1, namely, the bonding force between the film removing protective layer 8 on the bent glass plate 1 and the glass surface or the surface of the deep color ink layer is smaller than the bonding force between the film removing protective layer 8 on the straight glass plate and the glass surface or the surface of the deep color ink layer.

When the flat glass plate is further provided with the dark color ink layer 3, the dark color ink layer 3 is sintered and cured in the high-temperature heat treatment process at least 560 ℃, so that the bonding force between the dark color ink layer 3 on the bent glass plate 1 and the surface of the glass plate is increased, namely the bonding force between the dark color ink layer 3 on the bent glass plate 1 and the surface of the glass plate is larger than the bonding force between the dark color ink layer 3 on the flat glass plate and the surface of the glass plate; when being provided with electrically conductive silver thick liquid on the transparent conductive film 2, electrically conductive silver thick liquid is in through the high temperature thermal treatment in-process of at least 560 ℃ by the excitation activity, make electrically conductive silver thick liquid with transparent conductive film 2 zonulae occludens to promote electrically conductive connection performance.

And 4, step 4: removing the transparent conductive film 2 on the film removing protective layer 8 on the curved glass plate 1 by using a laser beam 91 generated by a laser 9;

in fig. 6a and fig. 7a, a laser 9 generates a laser beam 91 to remove the film of the transparent conductive film 2 covering the film removing protective layer 8, so that the transparent conductive film 2 on the film removing protective layer 8 is completely removed, and due to the obstruction of the laser beam 91 by the film removing protective layer 8, the laser beam 91 is prevented from directly irradiating the surface of the glass plate or the surface of the dark color ink layer, thereby playing a role of protecting the curved glass plate 1 and the dark color ink layer 3; the laser 91 is preferably an infrared laser for generating a laser beam 91 with a wavelength of 1053nm or 1064nm, or a green laser for generating a laser beam 91 with a wavelength of 527nm or 532 nm. In order to remove the entire transparent conductive film 2 on the film removing protective layer 8, at least a part of the film removing protective layer 8 may be broken by the laser beam 91.

As shown in fig. 6b and fig. 7b, the transparent conductive film 2 on the surface of the film removing protection layer 8 is completely removed, and the film removing protection layer 8 is exposed on the curved glass plate 1 or on the dark ink layer 3, so as to be conveniently cleaned in the following process.

And 5: removing the film removing protective layer 8 on the bent glass plate 1, and forming at least one film removing area 101 in the transparent conductive film 2 to obtain coated glass 100;

removing the film removing protective layer 8 from the curved glass plate 1 in fig. 6b and 7b, wherein the film removing protective layer 8 can be removed by cleaning or mechanical friction, for example, by directly washing with high-pressure water, to obtain the coated glass 100 shown in fig. 6c or 7c, wherein fig. 6c shows the film removing region 101 formed on the surface of the curved glass plate 1, and fig. 7c shows the film removing region 101 formed on the surface of the dark ink layer 3; the coated glass 100 has good profile quality and small optical distortion;

step 6: preparing a second glass plate 5 and at least one intermediate bonding layer 4, and laminating the coated glass 100 and the second glass plate 5 through the at least one intermediate bonding layer 4 to obtain laminated glass;

the second glass plate 5 is a bent glass plate formed by performing high-temperature heat treatment at least 560 ℃ and bending forming on a straight glass plate, or a chemically tempered straight glass plate with the thickness of less than or equal to 1.1mm, or a body-strengthened straight glass plate with the thickness of less than or equal to 1.1 mm; the chemically tempered flat glass plate is mainly characterized in that ions with different ionic radii are subjected to ion exchange on the surface of thin glass or ultrathin glass, so that the surface of the thin glass or the ultrathin glass generates higher surface stress along with a certain stress layer depth, and the strength of the thin glass or the ultrathin glass in the aspect of mechanical property is improved, and the chemically tempered flat glass plate is preferably alkali aluminosilicate glass; the body-strengthened flat glass plate is an original glass plate which does not need to be subjected to physical toughening or chemical toughening, and the original glass plate can be directly laminated with the coated glass 100 to form laminated glass, so that the laminated glass meets the use standard of the laminated glass on a vehicle, such as GB9656-2016 automobile safety glass in China, and the body-strengthened flat glass plate is preferably borosilicate glass;

the thickness of the coated glass 100 is at least 0.7mm greater than the thickness of the chemically tempered flat glass plate or the body-strengthened flat glass plate, and the chemically tempered flat glass plate and the body-strengthened flat glass plate can be bonded with the coated glass 100 through a cold forming process and finally bent and formed. Preferably, the coated glass 100 is used as an outer glass plate of a laminated glass, the transparent conductive film 2 is in direct contact with the intermediate adhesive layer 4, and the second glass plate 5 is used as an inner glass plate of the laminated glass.

The above description specifically describes a coated glass and a laminated glass thereof, and a printing composition for laser de-coating and a method for manufacturing a laminated glass according to the present invention, but the present invention is not limited by the above description, and therefore, any improvements, equivalent modifications, substitutions and the like according to the technical gist of the present invention are within the scope of the present invention.