CN111401501A

CN111401501A - Vehicle glass with bar code and preparation process thereof

Info

Publication number: CN111401501A
Application number: CN202010241411.5A
Authority: CN
Inventors: 曾齐福; 张火; 史智勇; 林勇; 杨新龙; 林永桂
Original assignee: Fuyao Glass Industry Group Co Ltd
Current assignee: Fuyao Glass Industry Group Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-07-10

Abstract

The invention provides vehicle glass with a bar code and a preparation process thereof, wherein the vehicle glass comprises first glass, second glass and an intermediate film arranged between the first glass and the second glass, wherein the first glass is provided with a first surface facing the outside of a vehicle and a second surface adhered to the intermediate film; the second glass has a third surface adhered to the intermediate film and a fourth surface facing the vehicle interior; the automobile window frame is characterized in that a shielding layer is arranged on the second surface and/or the fourth surface, a bar code formed by laser etching is arranged on the second surface and/or the fourth surface at a position corresponding to the shielding layer, and the bar code comprises unique information of glass and/or a vehicle.

Description

Vehicle glass with bar code and preparation process thereof

Technical Field

The invention relates to the field of vehicle glass, in particular to vehicle glass with a bar code and a preparation process thereof.

Background

The two-dimension code is manufactured on the automobile windshield, product tracing and anti-counterfeiting effects are achieved, each piece of glass two-dimension code is required to be unique, pattern shape and definition cannot be changed in the life cycle of the glass, and the two-dimension code can be always identified. At present, the process method for manufacturing the two-dimensional code on the automobile glass mainly comprises the following steps: transfer printing, code spraying, labeling, screen printing and the like. The transfer printing process mainly comprises the steps of welding components on the adhesive tape on the surface of the glass by laser beams to form a two-dimensional code pattern, and tearing off the adhesive tape. The code spraying process is to spray ink capable of being sintered onto glass surface with electronic nozzle. And in the labeling mode, the two-dimensional code is printed on the adhesive sticker by a printer and then is adhered to the outer surface of the glass or the inner surface of the front-baffle sandwich glass. And the screen printing mode is to print the two-dimensional code on the glass.

Disclosure of Invention

The existing process method for manufacturing the two-dimensional code on the automobile glass mainly has the defects that a transfer printing process needs to remove residual glue after printing, patterns have color difference, coated films and dark glass can affect the printing effect, a tape and other consumables are needed, the tape needs to be torn off in the automatic implementation, and the like.

The invention aims to solve the problems or the defects in the prior art and provides vehicle glass with a bar code and a preparation process thereof.

To this end, according to a first aspect of the present invention, there is provided a vehicle glazing with a barcode, the vehicle glazing comprising a first glass, a second glass, and an intermediate film disposed between the first glass and the second glass, wherein the first glass has a first surface facing an exterior of a vehicle and a second surface adhered to the intermediate film; the second glass has a third surface adhered to the intermediate film and a fourth surface facing the vehicle interior; the automobile window frame is characterized in that a shielding layer is arranged on the second surface and/or the fourth surface, a bar code formed by laser etching is arranged on the second surface and/or the fourth surface at a position corresponding to the shielding layer, and the bar code comprises unique information of glass and/or a vehicle.

The vehicle glass is plane glass or curved glass.

Wherein the curvature radius of the curved glass is greater than or equal to 50 mm.

The bar code comprises a one-dimensional code or a two-dimensional code or other character and graphics.

Wherein, the bar code is square or rectangle or circle or ellipse or other shapes.

The long axis direction or the long side direction of the bar code is arranged to be substantially parallel to the central axis of the vehicle glass.

The vehicle glass comprises a first long edge positioned on the upper side, a second long edge positioned on the lower side and arranged relative to the first long edge, and two opposite short edges positioned on the left side and the right side, wherein the bar code is arranged in the shielding layer area corresponding to the second long edge.

The distance between the bar codes and the upper edge of the shielding layer area corresponding to the second long edge is 5-30 mm.

Wherein the bar code is activated with a device in which unique information of the glass and/or the vehicle is recorded.

The second surface and the fourth surface are respectively provided with a first bar code and a second bar code, and the first bar code and the second bar code are arranged in a staggered mode relative to the surface of the vehicle glass.

Wherein the first bar code and the second bar code are respectively used for recording different information.

The bar code is provided with a frosted white bottom, and the transparency of the bar code is reduced by 10-30% relative to that of vehicle glass.

Wherein, the frosted white bottom surface roughness Ra of the bar code is between 0.1 and 0.8.

When the shielding layer is arranged on the second surface only or the shielding layer is arranged on the fourth surface only, the bar code formed on the shielding layer has a frosted white bottom when being observed from the outside of the vehicle, so that the color of an object (such as a center console) in the vehicle is shielded, and the contrast of the bar code is improved.

According to a second aspect of the present invention, there is also provided a process for producing a vehicle glazing with a barcode, the vehicle glazing comprising a first glazing, a second glazing, and an intermediate film disposed between the first glazing and the second glazing, wherein the first glazing has a first surface facing an exterior of a vehicle and a second surface adhered to the intermediate film; the second glass has a third surface adhered to the intermediate film and a fourth surface facing the vehicle interior; the method is characterized in that: the preparation process comprises the following steps:

(1) providing a first glass and a second glass;

(2) a shielding layer is arranged on the second surface and/or the fourth surface;

(3) forming a bar code on the second surface and/or the fourth surface by laser etching corresponding to the position of the shielding layer, wherein the bar code comprises unique information of glass and/or a vehicle;

(4) forming the first glass and the second glass in a hot bending furnace;

(5) an interlayer film is sandwiched between the first glass and the second glass.

The vehicle glass is curved glass, and the curvature radius is larger than or equal to 50 mm.

Wherein the bar code in the step (3) has a frosted white bottom, and the transparency of the bar code is reduced by at least 10% relative to that of the vehicle glass.

Wherein the bar code in the step (3) has a frosted white bottom, and the surface roughness Ra of the bar code is 0.1-0.8.

Wherein, when the prepared vehicle glass is a plane glass, the step (4) is omitted.

Wherein, the sequence of the step (3) and the step (4) can be interchanged.

Wherein, before the step (4), the step of pre-sintering the first glass and/or the second glass is further included.

Wherein, in the step (3), the bar code is formed only on the fourth surface by laser etching, and a step of pre-sintering the first glass and/or the second glass is not required before the step (4).

In summary, compared with the prior art, the invention at least comprises the following technical effects:

(1) according to the vehicle glass with the bar code, the shielding layer on the vehicle glass is etched through the laser to obtain the bar code with the patterning, the pattern is clear, the identification can be easily carried out through a mobile phone or other code scanning equipment, the authenticity and the product information can be obtained, the commodity number, the name, the brand, the vehicle type, the year money and the like are contained, the commodity is not easy to damage, and the method is permanent and effective;

(2) the defects of the traditional transfer printing, silk screen printing and other processes are overcome, and the bar code obtained by each laser etching can be unique or customized;

(3) when the second surface and the fourth surface of the vehicle glass are both provided with the shielding layers, the bar code arranged on the shielding layer on the second surface has a frosted white bottom when being observed from the outside of the vehicle, so that the color of the shielding layer on the fourth surface is shielded, and the black-white contrast of the bar code is improved; when the vehicle is observed from the inside, the bar code arranged on the shielding layer on the fourth surface has a frosted white bottom, so that the color of the shielding layer on the second surface is shielded, and the black-white contrast of the bar code is improved; when only the shielding layer is arranged on the second surface or the shielding layer is arranged on the fourth surface, the bar code formed on the shielding layer has a frosted white bottom when observed from the outside of the vehicle, and plays a role of shielding the color of an object (such as a center console) in the vehicle, so that the contrast of the bar code is improved, and the identifiability of the bar code is improved;

(4) the preparation process of the vehicle glass with the bar code is suitable for manufacturing the bar code of the curved glass and the bar code of the plane glass, when the preparation process is used for manufacturing the bar code on the plane glass, the laser head is easy to realize in the direction opposite to the normal direction of the glass, and the operation is simple and convenient. The equipment can be arranged on the formed glass, the bar code obtained by laser etching is concentrated, and the layout is flexible.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of a vehicle glass with a bar code according to embodiment 1 of the present invention

Fig. 2 is a cross-sectional view of a vehicle glass with a barcode provided in embodiment 1 of the present invention.

Fig. 3 is a front view of a vehicle glass with a barcode provided in embodiment 2 of the present invention.

Fig. 4 is a cross-sectional view of a vehicle glass with a barcode provided in embodiment 3 of the present invention.

Fig. 5 is a front view of the car glass with a barcode prepared in example 4 of the present invention.

Fig. 6 is a front view of the car glass with a barcode prepared in example 4 of the present invention.

Fig. 7 is a partially enlarged schematic view of the laser etching portion of fig. 5.

Fig. 8 is a schematic view of the focusing of laser etching on the glass profile in the process of manufacturing the vehicle glass with the bar code of embodiment 4 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The invention provides a vehicle glass, which can be any one of a car, a passenger car, a truck, a tractor, a special transport vehicle, a special vehicle and the like.

Referring to fig. 1 to 2, the vehicle glass includes a first glass 101, a second glass 102, and an intermediate film 103 disposed between the first glass 101 and the second glass 102, wherein the first glass has a first surface 1011 facing the outside of the vehicle and a second surface 1012 adhered to the intermediate film; the second glass has a third surface 1021 adhered to the interlayer film and a fourth surface 1022 facing the vehicle interior; the glass and vehicle information processing device is characterized in that

shielding layers

21 and 22 are arranged on the second surface 1012 and the fourth surface 1022, and

bar codes

104 and 105 formed by laser etching are arranged on the second surface 1012 and/or the fourth surface 1022 corresponding to the shielding layers, wherein the bar codes comprise unique information of glass and/or a vehicle. A bar code (barcode) may be a graphic identifier in which a plurality of black bars and spaces having different widths are arranged according to a certain coding rule to express a set of information.

Further, the vehicle glass is a plane glass or a curved glass, and the curved glass is preferably used as a front windshield in the embodiment. Further, the curvature radius of the curved glass is greater than or equal to 200 mm.

Further, the vehicle glass includes a first long side 11 located on the upper side, a second long side 12 located on the lower side with respect to the first long side, and two opposite

short sides

13, 14 located on the left and right sides.

Further, the material of the interlayer film 103 is typically polyvinyl butyral (PVB), which has excellent flexibility, and adhesiveness.

Further, the barcode may include a one-dimensional code, a two-dimensional code, or other text and graphics, and the one-dimensional code is preferred in this embodiment. The bar code may be square or rectangular or circular or oval or other shapes, with a rectangular shape being preferred in this embodiment. The position of the bar code may be in the shielding layer area of the edge of the vehicle glass, and the bar code is preferably disposed in the shielding layer area corresponding to the second long side 12 in this embodiment. Furthermore, since the middle area of the vehicle glass is relatively gentle, the long axis direction or the long side direction of the one-dimensional barcode is preferably arranged to be substantially parallel to the central axis of the vehicle glass in this embodiment, which is favorable for the focusing operation of the laser in the laser etching process.

The bar code may include both glass and unique information for the vehicle. For example, the information for the glass may include manufacturer, trade name, date of manufacture, glass properties (e.g., interlayer); the information of the vehicle may include: brand, vehicle type, vehicle body structure, annual payment, host factory abbreviation and the like.

Example 2

As shown in fig. 3, this embodiment is substantially the same as embodiment 1 except that: the barcode 104 of the present embodiment is disposed in the shielding layer area 22 corresponding to the second long side 12, specifically, the barcode 104 may be disposed on the left side of the shielding layer area 22, that is, in the lower left corner area of the vehicle glass; the bar code 104 can also be arranged on the right side of the screening layer area 22, i.e. in the lower right corner area of the vehicle glazing. It can be understood that the bar code 104 is disposed at the corner of the shielding layer area, so that the interference of the bar code to human eyes during the driving of the vehicle can be avoided or reduced, and the safe driving can be ensured.

Example 3

As shown in fig. 4, this embodiment is substantially the same as embodiment 1 except that: in embodiment 1, the bar code 104 formed by laser etching is only arranged on the second surface 1012 at a position corresponding to the shielding layer, while in this embodiment, the first bar code 104 and the second bar code 105 formed by laser etching are respectively arranged on the second surface 1012 and the fourth surface 1022 at a position corresponding to the shielding layer, and the first bar code 104 and the second bar code 105 are arranged in a staggered manner relative to the surface of the vehicle glass, i.e., do not overlap on the horizontal projection plane of the vehicle glass, so that the phenomenon of ghost or ghost image generated when tools such as a scanning gun, a mobile phone and the like identify the bar code can be avoided, and the accuracy and the efficiency of identifying the bar code are improved. Specifically, the first barcode 104 and the second barcode 105 may be arranged to be shifted in the vertical position or the horizontal position with respect to the vehicle glass plane. Alternatively, the first barcode 104 and the second barcode 105 may record different information, respectively, such as the first barcode 104 for recording glass information and the second barcode 105 for recording vehicle information; or the second barcode 105 facing the inside of the vehicle is used for recording glass and vehicle information, and the second barcode needs to be activated through a device recording glass and vehicle unique information, import data and realize association with a management system. In order to ensure the safety of data, the data can not be changed for a vehicle user or a non-manufacturer, and only can be used for inquiring products or verifying authenticity, and for a vehicle glass manufacturer, the data can be used for tracing the products or after-sale services; the first barcode 104 facing the outside of the vehicle may be used to record other information of the vehicle, such as vehicle annual inspection information imported to vehicle management authority authentication, or vehicle moving telephone imported to a vehicle user, and the information may be opened, changed, or closed as needed to achieve the purpose of time-limited/permanent sharing or informing others.

Example 4

As shown in fig. 5, 6 and 7, the present embodiment provides a process for manufacturing a vehicle glass with a barcode, including: the vehicle glass is used as a front windshield and comprises a first glass 101, a second glass 102 and an intermediate film 103 arranged between the first glass 101 and the second glass 102, wherein the first glass is provided with a first surface 1011 facing the outside of a vehicle and a second surface 1012 adhered with the intermediate film; the second glass has a third surface 1021 adhered to the interlayer film and a fourth surface 1022 facing the vehicle interior; the preparation process comprises the following steps:

first, a first glass 101 and a second glass 102 are provided;

secondly, shielding layers 21 and 22 are printed on the second surface 1012 and/or the fourth surface 1022, and the material of the shielding layers can be selected from an ink layer;

then, a bar code 105 is formed on the second surface 1012 and/or the fourth surface 1022 by laser etching corresponding to the position of the shielding layers 21, 22, the bar code including unique information of glass and/or vehicle;

then, the first glass 101 and the second glass 102 are molded or self-weight-formed in a hot bending furnace;

finally, an interlayer film 103 is sandwiched between the first glass and the second glass that are hot-roll formed.

Specifically, the step of forming the bar code by laser etching includes: by adopting the fiber laser, the fiber laser does not react with the glass, so that the glass material can be prevented from being removed. The diameter of the circular light spot of the laser is 0.03mm, the wavelength can be selected to be 1064nm, the power of the laser can be selected to be 42W, the frequency can be 650KHz, and the etching speed can be selected to be 4000 mm/s. The laser-etched locations can be laser-etched to remove portions of the masking layer (ink layer) at designated locations in the printed area of the windshield, preferably in the middle region of the masking layer 22, to create a frosted white background effect, which in combination with the remaining ink layer in the etched areas creates a bar code. Generally, the transparency (transparency) of the transparent region of the front windshield is generally higher than 75%, and the frosted effect can reduce the transparency by at least 10%, preferably by 30-50%. Generally, the surface roughness Ra of the glass before laser etching is about 0.01, and after laser etching, the surface roughness Ra of the bar code with frosted effect of the exposed white background on the glass is between 0.1 and 0.8, namely, the roughness of the white background area of the bar code formed after the local shielding layer is removed through laser etching is increased, and the transparency is reduced.

Since laser etching requires a high focal length, it is necessary to adjust the height position of the laser head before laser etching each glass sheet. For the laser etching bar code of the curved glass, a laser head can be arranged at the end part of a manipulator, the distance measurement is carried out in real time through the laser, and the posture correction is carried out through the end part of the manipulator, so that the profile fluctuation of the curved glass is overcome, and the accurate focal length is kept.

In order to keep the depth consistency of bar codes formed by laser etching and ensure the color consistency of frosted white bottom, the laser head is opposite to the normal direction of the curved glass as far as possible, and the specific process comprises the following steps: the red light square pattern projected on the surface of the glass in advance is consistent with the size and the carved position of the carving code, for a new variety or a new batch of glass products, whether the projected red light pattern is square or not can be measured, if the length and the width are inconsistent, the laser head can be judged not to be in the normal direction of the etched curved surface, and the posture of the laser head is readjusted until the red light pattern is square.

Since the laser focal length and the object distance deviation can be etched on the etched surface within the range of plus or minus 0.5mm, namely, the focus error range can realize laser etching within h being 1mm, taking the front curved glass with a plurality of curvature radiuses as an example, the front curved glass can comprise a profile with the curvature radius of 50mm, a profile with the curvature radius of 200mm, and even a profile with the curvature radius gradually changing from 50mm to 200mm, taking the glass profile with the curvature radius R being 200mm as an example, laser etching is carried out on the glass profile to form a two-dimensional code, and the graph size shown in fig. 8 is combined with a trigonometric function, so that L being 39.95mm and being equal to 40mm, namely, the maximum size of the obtained laser etched bar code is about 40mm × 40 mm.

Further, the barcode of this embodiment is preferably a two-dimensional code, which is square, and the size of the two-dimensional code may be 12mm × 12mm, and is located in the shielding layer region corresponding to the second long side of the front windshield, that is, in the large-head black edge (lower side shielding layer) region of the bottom of the glass, and is preferably located in the central region of the shielding layer, the large-head black edge height h is about 30mm to 200mm, and preferably the two-dimensional code is 5mm to 30mm from the upper edge (from the large-head black edge) d of the shielding layer region corresponding to the second long side, if d is too small (less than 5mm), the shielding region to be laser etched is too close to the transparent region of the glass, which is unfavorable for the two-dimensional code formed by laser etching to form a certain contrast with the surrounding shielding layer, and is unfavorable for tools such as a scanning gun, a mobile phone, to rapidly and effectively identify the two-dimensional code, and if d is too large (more than 30mm), that the shielding region to be laser etched is not enough from the lower edge of the second long side of the glass, which may cause the failure of the two-dimensional code due to the two-dimensional code, and the two-dimensional code is preferably between 30 mm.

In this embodiment, since the bar code is formed only on the fourth surface by laser etching, a step of pre-sintering the first glass and/or the second glass is not required before the interlayer film is sandwiched between the first glass and the second glass, and thus the process flow of manufacturing the vehicle glass with the bar code can be shortened. When the shielding layer is arranged on the fourth surface, the bar code formed on the shielding layer has a frosted white bottom when being observed from the outside of the vehicle, and the color of an object (such as a center console) in the vehicle is shielded, so that the contrast of the bar code is improved, and the bar code can be effectively identified conveniently. And when the bar code is formed on the second surface by laser etching or the bar code is formed on the second surface and the fourth surface by laser etching, the step of pre-sintering the first glass and/or the second glass is needed before the interlayer film is sandwiched between the first glass and the second glass, so that the ink layer is pre-sintered and cured on the surface of the glass, the defect of the process caused by the fact that the ink layer is not dried and splashed in the laser etching process is avoided, and the performance and the stability of the glass are ensured. When the shielding layers are arranged on the second surface and the fourth surface, the bar code arranged on the shielding layer on the second surface has a frosted white bottom when being observed from the outside of the vehicle, the color of the shielding layer on the fourth surface is shielded, the black-white contrast of the bar code is improved, and the bar code can be effectively identified; and from the inside observation of vehicle, the bar code that sets up on the shielding layer on the fourth surface has dull polish white end, plays the shielding effect to the shielding layer colour on the second surface, has improved the black and white contrast of bar code, so the effective recognition that can be obtained of bar code of being convenient for. It is easy to understand that, when the shielding layer is only disposed on the second surface and the shielding layer is not disposed on the fourth surface, the barcode formed on the shielding layer has a frosted white background when viewed from the outside of the vehicle, so as to shield the color of an object (such as a console) inside the vehicle, thereby improving the contrast of the barcode, and thus facilitating the barcode to be effectively identified.

It should be added that in this embodiment, a bar code 105 is formed on the second surface 1012 and/or the fourth surface 1022 by laser etching, where the bar code includes unique information of glass and/or a vehicle; then, the first glass 101 and the second glass 102 are subjected to compression molding in a hot bending furnace; in the actual manufacturing process, the first glass 101 and the second glass 102 may be first molded in a hot bending furnace, and then the bar code 105 may be formed on the second surface 1012 and/or the fourth surface 1022 by laser etching. It is understood that the present embodiment provides a process for manufacturing vehicle glass with bar codes, wherein the process step of forming bar codes by laser etching can be performed before the pressing in the hot bending furnace, i.e. on flat glass for example, or after the pressing in the hot bending furnace, i.e. on curved glass for example.

In summary, the preparation process of the vehicle glass with the bar code provided by the invention is not only suitable for manufacturing the bar code of the curved glass, but also suitable for manufacturing the bar code of the plane glass. When the laser head is used for manufacturing bar codes on plane glass, the normal direction of the laser head facing the glass is easier to realize, and the operation is simpler and more convenient. Compared with the prior art, the invention overcomes the defects of traditional transfer printing, silk screen printing and the like, and can realize that the bar code obtained by each laser etching is unique or can be customized.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims

1. A vehicle glazing with a barcode, the vehicle glazing comprising a first glazing, a second glazing, and an interlayer film disposed between the first glazing and the second glazing, wherein the first glazing has a first surface facing an exterior of a vehicle and a second surface adhered to the interlayer film; the second glass has a third surface adhered to the intermediate film and a fourth surface facing the vehicle interior; the automobile window frame is characterized in that a shielding layer is arranged on the second surface and/or the fourth surface, a bar code formed by laser etching is arranged on the second surface and/or the fourth surface at a position corresponding to the shielding layer, and the bar code comprises unique information of glass and/or a vehicle.

2. The vehicle glazing with the barcode according to claim 1, wherein the vehicle glazing is a flat glass or a curved glass.

3. The vehicle glazing with a barcode according to claim 2, wherein the curved glass has a radius of curvature greater than or equal to 50 mm.

4. The barcoded vehicle glazing of claim 1, wherein the barcode comprises a one-dimensional code or a two-dimensional code or other text graphic.

5. The vehicle glazing with a barcode according to claim 1, wherein the barcode is square or rectangular or circular or oval or other shape.

6. The vehicle glazing with a barcode according to claim 1, wherein a long axis direction or a long side direction of the barcode is arranged substantially parallel to a central axis of the vehicle glazing.

7. The vehicle glazing with the barcode according to claim 1, wherein the vehicle glazing comprises a first long side located on the upper side, a second long side located on the lower side opposite to the first long side, and two opposite short sides located on the left and right sides, and the barcode is disposed in a shielding layer area corresponding to the second long side.

8. The vehicle glazing with a barcode according to claim 7, wherein the barcode is 5mm to 30mm from an upper edge of the shielding layer area corresponding to the second long side.

9. The vehicle glazing with a barcode according to claim 1, characterized in that the barcode is activated with a device that records unique information of the glazing and/or the vehicle.

10. The vehicle glazing with the barcode according to claim 1, wherein the second surface and the fourth surface are respectively formed with a first barcode and a second barcode, and the first barcode and the second barcode are arranged in a staggered manner with respect to the surface of the vehicle glazing.

11. The barcoded vehicle glazing of claim 10, wherein the first barcode and the second barcode are each used to record different information.

12. The vehicle glazing with a barcode according to claim 1, wherein the barcode has a frosted white background with a transparency reduced by at least 10% relative to the transparency of the vehicle glazing.

13. The vehicle glazing with a barcode according to claim 12, wherein the barcode has a frosted white bottom surface roughness Ra of 0.1 to 0.8.

14. The vehicle glazing with a barcode according to claim 12, wherein when a masking layer is provided only on the second surface or only on the fourth surface, the barcode formed on the masking layer has a frosted white background when viewed from the outside of the vehicle, and the color of an object inside the vehicle is masked, thereby improving the contrast of the barcode.

15. A preparation process of vehicle glass with a bar code comprises the following steps: the vehicle glass includes a first glass, a second glass, and an intermediate film disposed between the first glass and the second glass, wherein the first glass has a first surface facing an exterior of a vehicle and a second surface adhered to the intermediate film; the second glass has a third surface adhered to the intermediate film and a fourth surface facing the vehicle interior; the method is characterized in that: the preparation process comprises the following steps:

(1) providing a first glass and a second glass;

(4) forming the first glass and the second glass in a hot bending furnace;

16. The process for manufacturing vehicle glass with a barcode according to claim 15, wherein the vehicle glass is a flat glass or a curved glass.

17. The process for manufacturing vehicle glass with a barcode according to claim 16, wherein the curved glass has a radius of curvature of 50mm or more.

18. The process of claim 15, wherein the bar code of step (3) has a frosted white background, and the transparency of the bar code is reduced by at least 10% relative to the transparency of the vehicle glass.

19. The process for manufacturing vehicle glass with a barcode according to claim 18, wherein the barcode has a frosted white bottom surface roughness Ra of 0.1 to 0.8.

20. The process for preparing vehicle glass with a bar code according to claim 15, wherein the sequence of the step (3) and the step (4) can be interchanged.

21. The process for producing vehicle glass with a barcode according to claim 15, wherein the vehicle glass produced is a flat glass, and the step (3) is omitted.

22. The process for preparing vehicle glass with bar code according to claim 15, wherein the step (5) is preceded by a step of pre-sintering the first glass and/or the second glass.

23. The process for preparing vehicle glass with bar code according to claim 15, wherein in the step (3), the bar code is formed on the fourth surface only by laser etching, and before the step (5), the step of pre-sintering the first glass and/or the second glass is not required.

24. The process for manufacturing vehicle glass with a barcode according to claim 15, wherein when a masking layer is provided only on the second surface or only on the fourth surface, the barcode formed on the masking layer has a frosted white background when viewed from outside the vehicle, and the color of an object inside the vehicle is masked, thereby improving the contrast of the barcode.