CN110698076A - Method for manufacturing coated glass of front windshield automobile - Google Patents
Method for manufacturing coated glass of front windshield automobile Download PDFInfo
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- CN110698076A CN110698076A CN201911111520.9A CN201911111520A CN110698076A CN 110698076 A CN110698076 A CN 110698076A CN 201911111520 A CN201911111520 A CN 201911111520A CN 110698076 A CN110698076 A CN 110698076A
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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
- C03C17/001—General methods for coating; Devices therefor
- C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
- B32B17/10871—Making laminated safety glass or glazing; Apparatus therefor by pressing in combination with particular heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
- B60J1/20—Accessories, e.g. wind deflectors, blinds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
- B60J3/007—Sunglare reduction by coatings, interposed foils in laminar windows, or permanent screens
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
-
- 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
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/15—Deposition methods from the vapour phase
- C03C2218/154—Deposition methods from the vapour phase by sputtering
- C03C2218/156—Deposition methods from the vapour phase by sputtering by magnetron sputtering
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- General Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention relates to the technical field of automobile glass processing, in particular to a method for manufacturing coated glass of a front windshield automobile. The manufacturing method provided by the invention comprises the following steps: rolling a layer of high-temperature protective film on the surface of the original automobile glass sheet to obtain a high-temperature protective film layer; cutting the high-temperature protection film layer into a film coating area, a communication window area and an edge sealing area; after a low-radiation film is plated on the surface of the high-temperature protective film of the original automobile glass, the high-temperature protective film in the communication window area and the edge sealing area is removed, and the original coated automobile glass is obtained; and sequentially carrying out powder spraying, pairing, hot bending, sheet combining initial pressing and high-pressure heat treatment on the original piece of coated automobile glass to obtain the front windshield automobile coated glass. The manufacturing method solves the problems of corrosion and oxidation of the low-radiation film at the edge of the coated glass of the front windshield automobile and ensures the smooth passing of electromagnetic waves such as GPS, ETC, RF and the like.
Description
Technical Field
The invention relates to the technical field of automobile glass, in particular to a method for manufacturing coated glass of a front windshield automobile.
Background
The automobile glass is a main channel for heat exchange inside and outside the automobile, and particularly in hot summer, the heat quantity entering the automobile through the automobile glass is up to more than 70%, so that the refrigeration energy consumption of an automobile air conditioner is improved, and the comfort in the automobile is poor. At present, because the silver-based low-emissivity coated glass has higher visible light transmittance and infrared reflection characteristic, the total solar energy transmittance can be reduced, the energy consumption of an automobile can be effectively reduced, the comfort is improved, and the silver-based low-emissivity coated glass is an ideal automobile energy-saving glass product. However, the nano silver layer in the silver-based low-emissivity coated glass is easy to corrode and oxidize, and when the silver-based low-emissivity coated glass is used for automobile glass, the silver-based low-emissivity coated glass needs to be made into laminated glass for use, and the edge part needs to be subjected to film removal treatment. In addition, the nano silver layer can shield electromagnetic waves and influence signals of communication equipment such as GPS, ETC and RF in the vehicle.
Therefore, effective removal of low emissivity films from the edges of automotive glass and intermediate communication window areas is a fundamental requirement for the manufacture of thermally insulated automotive front windshields.
Disclosure of Invention
The invention aims to provide a manufacturing method of a front windshield automobile coated glass, which can effectively remove low-radiation films at the edge part of the automobile glass and in a communication window area.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for manufacturing coated glass of a front windshield automobile, which comprises the following steps:
rolling a high-temperature protective film on the surface of the original piece of the automobile glass to obtain a high-temperature protective film layer;
cutting the high-temperature protection film layer into a film coating area, a communication window area and an edge sealing area;
after a low-radiation film is plated on the surface of the high-temperature protective film of the original automobile glass, the high-temperature protective film in the communication window area and the edge sealing area is removed, and the original coated automobile glass is obtained;
and sequentially carrying out powder spraying, pairing, hot bending, sheet combining initial pressing and high-pressure heat treatment on the original piece of coated automobile glass to obtain the front windshield automobile coated glass.
Preferably, the adhesive force of the high-temperature protective film at 180 ℃ is more than 4g/25 mm;
the shrinkage rate of the high-temperature protective film after being kept for 20min at 180 ℃ is less than 0.2%.
Preferably, the material of the high-temperature protective film comprises polyimide and organic silicon pressure-sensitive adhesive;
the thickness of the high-temperature protective film layer is 25-50 mu m.
Preferably, the low-radiation film is plated in a magnetron sputtering mode; the low-emissivity thin film is plated on 2mm transparent glass, and after the low-emissivity thin film is subjected to hot bending, the visible light transmittance is more than 78%, the total solar energy transmittance is less than 0.48%, and the emissivity is less than 0.05.
Preferably, the cutting is laser cutting;
the focal length height value of the laser cutting machine body adopted by laser cutting is 12.0mm, the pulse width is 0.110ms, the pulse frequency is 1750Hz, the output power is 8-11W, and the cutting speed is 8-10 mm/s.
Preferably, the edge sealing areas are positioned at four sides of the original automobile glass sheet, and the width of each edge of the edge sealing area on each side of the original automobile glass sheet is 5-20 mm;
the communication window area is positioned in a non-edge sealing area in the original automobile glass; the communication window area is rectangular, circular or elliptical;
the residual area of the original piece of automobile glass is a film coating area.
Preferably, the powder spraying is to spray a layer of silicon powder layer on the surface of the low-radiation film.
Preferably, the hot bending treatment process comprises the steps of placing transparent glass with the same size as the coated original automobile glass on the coated original automobile glass, and carrying out hot bending treatment;
and the coating layer of the coated automobile original piece glass is in contact with the transparent glass.
Preferably, the laminating initial pressing is to sequentially arrange the transparent glass after the hot bending treatment, the PVB film and the coated automobile original sheet glass after the hot bending treatment in sequence for laminating;
and the PVB film is in contact with the film layer of the coated original automobile glass subjected to the hot bending treatment.
The invention provides a method for manufacturing coated glass of a front windshield automobile, which comprises the following steps: rolling a high-temperature protective film on the surface of the original piece of the automobile glass to obtain a high-temperature protective film layer; cutting the high-temperature protection film layer into a film coating area, a communication window area and an edge sealing area; after a low-radiation film is plated on the surface of the high-temperature protective film of the original automobile glass, the high-temperature protective film in the communication window area and the edge sealing area is removed, and the original coated automobile glass is obtained; and sequentially carrying out powder spraying, pairing, hot bending, sheet combining initial pressing and high-pressure heat treatment on the original piece of coated automobile glass to obtain the front windshield automobile coated glass. According to the invention, a layer of high-temperature protective film is rolled on the surface of the original automobile glass sheet before the low-radiation film is sputtered, and then the high-temperature protective films in the communication window area and the edge sealing area are removed after the low-radiation film is sputtered; the problems of corrosion and oxidation of the low-radiation film at the edge of the coated glass are solved, and the smooth passing of electromagnetic waves such as GPS, ETC and RF is ensured.
Drawings
FIG. 1 is a cut automotive glass roll pressed with a high temperature protective film; wherein 1 and 2 are cutting lines;
FIG. 2 is a schematic structural view of a coated automotive glass according to the present invention; wherein, 3 is a coating area plated with a low-radiation film, 4 is a sealed edge area, and 5 is a communication window area.
Detailed Description
The invention provides a method for manufacturing coated glass of a front windshield automobile, which comprises the following steps:
rolling a high-temperature protective film on the surface of the original piece of the automobile glass to obtain a high-temperature protective film layer;
cutting the high-temperature protection film layer into a film coating area, a communication window area and an edge sealing area;
after a low-radiation film is plated on the surface of the high-temperature protective film of the original automobile glass, the high-temperature protective film in the communication window area and the edge sealing area is removed, and the original coated automobile glass is obtained;
and sequentially carrying out powder spraying, pairing, hot bending, sheet combining initial pressing and high-pressure heat treatment on the original piece of coated automobile glass to obtain the front windshield automobile coated glass.
According to the invention, the high-temperature protective film is rolled on the surface of the original piece of the automobile glass to obtain the high-temperature protective film layer. In the invention, the automobile original glass is preferably obtained by sequentially cutting, breaking off, edging, cleaning and drying transparent glass; the transparent glass of the present invention is not limited in any particular way, and any windshield that can be used in an automobile grade, as is well known to those skilled in the art, may be used. In the present invention, the thickness of the transparent glass is preferably 2.0 mm. The cutting, breaking off, edging, cleaning and drying are not limited in any way and can be carried out by processes well known to those skilled in the art. In the present invention, the high temperature protective film preferably has an adhesion of > 4g/25mm at 180 ℃; the shrinkage of the high temperature protective film after being maintained at 180 ℃ for 20min is preferably less than 0.2%. In the invention, the base material of the high-temperature protective film (type GB-K2540) is polyimide and organic silicon pressure-sensitive adhesive.
The rolling is not particularly limited in the present invention and may be carried out in a manner known to those skilled in the art.
In the invention, the thickness of the high-temperature protective film layer is preferably 25-50 μm, and more preferably 35-45 μm.
After the high-temperature protection film layer is obtained, the high-temperature protection film layer is cut into a film coating area, a communication window and a wrapping area; in the invention, the edge covering area is preferably positioned at four sides of the automobile original sheet glass (4 positions shown in figure 2), and the width of the edge covering area at each side of the automobile original sheet glass is preferably 5-20 mm, and more preferably 10-15 mm; in the present invention, the communication window area is preferably located at any position (such as the position 5 shown in fig. 2, but not limited to the above position) of the original glass of the automobile; in the present invention, the "arbitrary position" may be understood as an arbitrary position of the non-edge-sealed area that does not affect the line of sight of the driver in the communication window area. The communication window area is preferably positioned at the top or the bottom of the longitudinal center line of the original piece glass of the automobile; the shape of the communication window area is preferably rectangular, circular or elliptical, and more preferably rectangular; the longest edge of the rectangle is preferably less than or equal to 160 mm; when the shape of the communication window region is circular or elliptical, the area of the circle or ellipse is preferably the same as the area range of the rectangle; the residual area of the original piece of automobile glass is preferably a film coating area.
In the present invention, the cutting is preferably laser cutting; the focal length height value of a laser cutting machine body adopted for laser cutting is preferably 12.0mm, and the pulse width is preferably 0.110 ms; the pulse frequency is preferably 1750 Hz; the output power is preferably 8-11W, and more preferably 8W or 11W; the cutting speed is preferably 8-10 mm/s, and more preferably 8mm/s or 10 mm/s.
After the cutting is finished, after a low-radiation film is plated on the surface of the high-temperature protective film of the original automobile glass sheet, the high-temperature protective film of the communication window and the edge covering area is removed, and the coated original automobile glass sheet is obtained; in the invention, the plating mode is preferably magnetron sputtering; the magnetron sputtering method of the present invention is not particularly limited, and may be performed by a process known to those skilled in the art. In the invention, the visible light transmittance of the low-radiation film plated on 2mm transparent glass after being thermally bent is preferably more than 78%, and the total solar energy transmittance is preferably<0.48%, emissivity is preferred<0.05. In the present invention, the structure of the low-emissivity thin film is preferably: first dielectric layer (Si)3N4The film is preferably 20-28 nm in thickness), and a first growth layer (a ZnO film co-doped with a third main group metal and H; the first mentionedThe group III metal is preferably Al, Ga or In; ar and H in sputtering atmosphere2The volume flow ratio of (A) is 1-12%; when the third main group metal is Al, the doping amount of the Al is preferably 1-3 wt%; when the third main group metal is Ga, the doping amount of the Ga is preferably 4-8 wt%; when the third main group metal is In, the doping amount of the In is preferably 8-15 wt%; the thickness of the first protective layer is 8-10 nm), the first protective layer (NiCr film, the thickness of the first protective layer is 0.6-1.0 nm), the first silver layer (Ag film, 6-9 nm), the second protective layer (NiCr film, the thickness of the second protective layer is 0.8-1.3 nm), and the second growth layer (ZnO film co-doped with H and a third main group metal; the third main group metal is preferably Al, Ga or In; ar and H in sputtering atmosphere2The volume flow ratio of (A) is 1-12%; when the third main group metal is Al, the doping amount of the Al is preferably 1-3 wt%; when the third main group metal is Ga, the doping amount of the Ga is preferably 4-8 wt%; when the third main group metal is In, the doping amount of the In is preferably 8-15 wt%; 8-10 nm in thickness) and a second dielectric layer (Si)3N4A film with a thickness of 58-66 nm), a third growth layer (a ZnO film co-doped with a third main group metal and H; the third main group metal is preferably Al, Ga or In; ar and H in sputtering atmosphere2The volume flow ratio of (A) is 1-12%; when the third main group metal is Al, the doping amount of the Al is preferably 1-3 wt%; when the third main group metal is Ga, the doping amount of the Ga is preferably 4-8 wt%; when the third main group metal is In, the doping amount of the In is preferably 8-15 wt%; 11-13 nm in thickness), a third protective layer (NiCr film, 0.6-1.0 nm in thickness), a second silver layer (Ag film, 13-16 nm), a fourth protective layer (NiCr film, 0.9-1.5nm in thickness), and a fourth growth layer (ZnO film co-doped with a third main group metal and H; the third main group metal is preferably Al, Ga or In; ar and H in sputtering atmosphere2The volume flow ratio of (A) is 1-12%; when the third main group metal is Al, the doping amount of the Al is preferably 1-3 wt%; when the third main group metal is Ga, the doping amount of the Ga is preferably 4-8 wt%; when the third main group metal is In, the doping amount of the In is preferably 8-15 wt%; thickness of 12 to 15nm)A third dielectric layer (Si)3N4A thin film having a thickness of 26 to 35 nm).
In the present invention, the process of removing the high temperature protective film in the communication window and the edge-covered area is preferably to tear off the high temperature protective film in the communication area and the edge-covered area directly by hand according to the above cut area. In the present invention, the low-emissivity film sputtered in the above-described region is also removed during the tearing process.
After the coated original automobile glass sheet is obtained, the coated original automobile glass sheet is subjected to powder spraying, pairing, hot bending, sheet combination initial pressing and high-pressure heat treatment in sequence to obtain the front windshield automobile glass. In the invention, the powder spraying is preferably to spray a layer of silicon powder layer on the surface of the low-radiation film; the silicon powder layer is not limited in any way, and the parameters of the silicon powder layer known to those skilled in the art are adopted, so that the effect of preventing two pieces of glass from being bonded during hot bending can be achieved.
In the invention, the matching is preferably to match another piece of transparent glass with the same size as the original piece of coated automobile glass; the preparation method of the other piece of transparent glass with the same size as the original piece of coated automobile glass is preferably that the other piece of transparent glass is obtained by sequentially cutting, breaking off, edging, cleaning and drying the transparent glass; the transparent glass of the present invention is not limited in any particular way, and any windshield that can be used in an automobile grade, as is well known to those skilled in the art, may be used. In the present invention, the thickness of the transparent glass is preferably 2.0 mm. The cutting, breaking off, edging, cleaning and drying are not limited in any way and can be carried out by processes well known to those skilled in the art.
In the invention, the hot bending treatment process is preferably to place transparent glass with the same size as the coated original automobile glass on the coated original automobile glass for hot bending treatment; and the coating layer of the coated automobile original piece glass is in contact with the transparent glass. In the invention, the hot bending treatment is preferably carried out in a continuous hot bending furnace, and the temperature of the hot bending treatment is preferably 560-600 ℃.
In the invention, the lamination initial pressing is preferably to sequentially arrange the transparent glass after the hot bending treatment, the PVB film and the coated automobile original sheet glass after the hot bending treatment in sequence for lamination and vacuum heat treatment; and the PVB film is in contact with the film layer of the coated original automobile glass subjected to the hot bending treatment. The source of the PVB film is not particularly limited in the present invention and can be any source known to those skilled in the art. The conditions for the initial pressing of the laminated sheet are not particularly limited, and the method can be carried out by adopting the conditions well known to those skilled in the art.
The conditions for the high-pressure heat treatment are not particularly limited in the present invention, and may be those well known to those skilled in the art.
The following will explain the method for manufacturing a windshield of an automobile according to the present invention in detail with reference to the examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Sequentially cutting, breaking off, edging, cleaning and drying transparent glass with the thickness of 2.0mm to obtain original automobile glass sheets;
rolling a layer of high-temperature protective film (type: GB-K2540, thickness of 40 μm, including polyimide and organic silicon pressure-sensitive adhesive, adhesive force at 180 ℃ is more than 4g/25mm, shrinkage rate is less than 0.2% after keeping at 180 ℃ for 20 min;
cutting the high-temperature protective film layer (the focal length height value of a laser cutting machine body is 12000, the pulse width is 0.110ms, the pulse frequency is 1750Hz, the output power is 8W, and the cutting speed is preferably 10mm/s) to form a film coating area, a communication window (a square with the side length of 140 mm) and a sealed edge area (the width of 15 mm);
sputtering a low-radiation film on the surface of the high-temperature protective film of the automobile original glass: first dielectric layer (Si)3N4A film with the thickness of 25nm), a first growth layer (Al and H co-doped AZO: H transparent conductive oxide film, the Al content is 3 wt%; ar and H in sputtering atmosphere2The volume flow ratio of (2) is 6%; thickness of 9nm), first protective layer (NiCr thin)A film with the thickness of 0.8nm), a first silver layer (Ag film, 8nm), a second protective layer (NiCr film, the thickness of 1nm), a second growth layer (Al, H co-doped AZO: H transparent conductive oxide film, the Al content is 3 wt%; ar and H in sputtering atmosphere2The volume flow ratio of (2) is 6%; 9nm thick), a second dielectric layer (Si)3N4A film with the thickness of 62nm) and a third growth layer (Al and H co-doped AZO: H transparent conductive oxide film, wherein the Al content is 3 wt%; ar and H in sputtering atmosphere2The volume flow ratio of (2) is 6%; 12nm in thickness), a third protective layer (NiCr film, 0.9nm in thickness), a second silver layer (Ag film, 16nm in thickness), a fourth protective layer (NiCr film, 1nm in thickness), a fourth growth layer (Al, H co-doped AZO: H transparent conductive oxide film, Al content 3 wt%; ar and H in sputtering atmosphere2The volume flow ratio of (2) is 6%; 12nm thick), a third dielectric layer (Si)3N4Film with thickness of 30nm), removing the high-temperature protective film at the communication window and the edge sealing area to obtain the original coated automobile glass;
spraying a layer of silicon powder on the surface of the low-emissivity film of the coated automobile original piece glass;
matching another piece of transparent glass (the thickness is 2.0mm) with the same size as the original piece of coated automobile glass;
placing the transparent glass with the same size as the original piece of coated automobile glass on the original piece of coated automobile glass (the coating layer of the original piece of coated automobile glass is in contact with the transparent glass), and performing hot bending treatment;
the method comprises the steps of sequentially arranging transparent glass after hot bending treatment, a PVB film and coated automobile original glass after hot bending treatment (the PVB film is in film contact with the coated automobile original glass after hot bending treatment) to carry out film laminating and initial pressing, and carrying out high-pressure heat treatment in a high-pressure kettle to obtain the front windshield automobile coated glass.
The properties of the coated glass for a front windshield of an automobile obtained in this example are shown in table 1:
TABLE 1 Properties of coated glass for a front windshield of an automobile obtained in example 1
| Examples | Transmittance of visible light | Total solar energy transmittance | Total transmittance of solar infrared thermal energy |
| Examples | 70.3％ | 39.7％ | 10％ |
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A method for manufacturing coated glass of a front windshield automobile is characterized by comprising the following steps:
rolling a high-temperature protective film on the surface of the original piece of the automobile glass to obtain a high-temperature protective film layer;
cutting the high-temperature protection film layer into a film coating area, a communication window area and an edge sealing area;
after a low-radiation film is plated on the surface of the high-temperature protective film of the original automobile glass, the high-temperature protective film in the communication window area and the edge sealing area is removed, and the original coated automobile glass is obtained;
and sequentially carrying out powder spraying, pairing, hot bending, sheet combining initial pressing and high-pressure heat treatment on the original piece of coated automobile glass to obtain the front windshield automobile coated glass.
2. The method of claim 1, wherein the high temperature protective film has an adhesion of > 4g/25mm at 180 ℃;
the shrinkage rate of the high-temperature protective film after being kept for 20min at 180 ℃ is less than 0.2%.
3. The manufacturing method according to claim 2, wherein the material of the high-temperature protective film includes polyimide and silicone pressure-sensitive adhesive;
the thickness of the high-temperature protective film layer is 25-50 mu m.
4. The manufacturing method according to claim 1, wherein the low-emissivity thin film is plated by magnetron sputtering; the low-emissivity thin film is plated on 2mm transparent glass, and after the low-emissivity thin film is subjected to hot bending, the visible light transmittance is more than 78%, the total solar energy transmittance is less than 0.48%, and the emissivity is less than 0.05.
5. The manufacturing method according to claim 1, wherein the cutting is laser cutting;
the focal length height value of the laser cutting machine body adopted by laser cutting is 12.0mm, the pulse width is 0.110ms, the pulse frequency is 1750Hz, the output power is 8-11W, and the cutting speed is 8-10 mm/s.
6. The method of manufacturing of claim 1, wherein the edge seal regions are located on four sides of the automotive raw sheet of glass, the edge seal regions having a width of 5mm to 20mm on each side of the automotive raw sheet of glass;
the communication window area is positioned in a non-edge sealing area in the original automobile glass; the communication window area is rectangular, circular or elliptical;
the residual area of the original piece of automobile glass is a film coating area.
7. The manufacturing method according to claim 1, wherein the powder spraying is to spray a layer of silicon powder on the surface of the low-emissivity thin film.
8. The manufacturing method according to claim 1, wherein the hot bending process is performed by placing a transparent glass having the same size as the coated automotive original glass on the coated automotive original glass;
and the coating layer of the coated automobile original piece glass is in contact with the transparent glass.
9. The manufacturing method according to claim 1, wherein the laminating initial pressing is to laminate the transparent glass after the hot bending treatment, the PVB film and the coated automobile original glass after the hot bending treatment in sequence;
and the PVB film is in contact with the film layer of the coated original automobile glass subjected to the hot bending treatment.
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| CN201911111520.9A CN110698076A (en) | 2019-11-14 | 2019-11-14 | Method for manufacturing coated glass of front windshield automobile |
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| CN201911111520.9A CN110698076A (en) | 2019-11-14 | 2019-11-14 | Method for manufacturing coated glass of front windshield automobile |
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Cited By (1)
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