CN115593049B

CN115593049B - Laminated glass, preparation method thereof and vehicle

Info

Publication number: CN115593049B
Application number: CN202211253039.5A
Authority: CN
Inventors: 林文; 林军; 江子贤; 刘义仁; 杨嘉鹏
Original assignee: Fujian Wanda Automobile Glass Industry Co Ltd
Current assignee: Fujian Wanda Automobile Glass Industry Co Ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-12-19
Anticipated expiration: 2042-10-13
Also published as: CN115593049A

Abstract

The application provides laminated glass, a preparation method thereof and a vehicle, wherein the laminated glass comprises a first glass plate, a second glass plate, an interlayer, a first bus, a second bus and an exhaust film; the first glass plate and the second glass plate are connected through the interlayer; the middle layer is provided with an electric heating element, the first bus and the second bus are arranged on one side of the middle layer where the electric heating element is located and are respectively and electrically connected with the electric heating element, and the first bus and the second bus are not contacted with each other; the exhaust film covers a portion of the second bus bar and a portion of the first bus bar and extends to an edge of the intermediate layer. In the process of forming the laminated glass, the exhaust films can enable the gas at two sides of the second bus to be exhausted along the extending direction of the exhaust films, so that bubbles generated by shielding of the first bus are prevented from being remained in the laminated glass, and the bubble rate of the finally formed laminated glass is reduced.

Description

Laminated glass, preparation method thereof and vehicle

Technical Field

The application relates to the technical field of vehicle spare and accessory part production, in particular to laminated glass, a preparation method thereof and a vehicle.

Background

At present, window glass applied to vehicles is integrated with more and more functions, in order to realize multiple functions of the window glass, electric wires and the like are required to be arranged in the window glass, and after bus welding, wire distribution, electric connector welding and the like are performed on a membrane, the membrane is clamped between two pieces of glass, so that laminated glass is formed.

However, since the bus bars in the laminated glass are completely attached to the surface of the glass, the bus bars on the outer side are easy to block the exhaust route of the bus bars on the inner side, so that the gas in the laminated glass cannot be completely exhausted in the cold pumping and initial pressing process steps, and the bubble rate of the finally formed laminated glass is higher.

Disclosure of Invention

The application discloses laminated glass can solve the technical problem that gas in the laminated glass can not be thoroughly discharged.

In a first aspect, the present application provides a laminated glass comprising a first glass sheet, a second glass sheet, an interlayer, a first bus bar, a second bus bar, and an exhaust film;

the first glass plate and the second glass plate are connected through the interlayer;

the middle layer is provided with an electric heating element, the first bus and the second bus are arranged on one side of the middle layer where the electric heating element is located and are respectively and electrically connected with the electric heating element, and the first bus and the second bus are not contacted with each other;

the exhaust film covers a portion of the second bus bar and a portion of the first bus bar and extends to an edge of the intermediate layer.

In the process of forming the laminated glass, the gas at two sides of the second bus can be discharged along the extending direction of the gas discharge film by the gas discharge film, so that bubbles generated by shielding of the first bus are prevented from being remained in the laminated glass, and the bubble rate of the finally formed laminated glass is reduced.

Optionally, at least part of the first bus bar forms a barrier to at least part of the second bus bar, at least part of the first bus bar is closer to the edge of the intermediate layer than the blocked part of the second bus bar, and the exhaust film covers the blocked part of the second bus bar.

Optionally, the exhaust film is in a strip shape, and extends to the first bus along the length direction of the blocked part of the second bus, and covers the part of the first bus in the extending direction.

Optionally, the portion of the first bus forming the barrier to the second bus includes a first extension portion, a bending portion and a second extension portion, the first extension portion is connected with one side of the bending portion in a bending manner, the second extension portion is connected with the other side of the bending portion in a bending manner, the exhaust film extends towards the first extension portion along the length direction of the portion of the second bus being blocked, and the exhaust film covers the portion of the second bus being blocked and the portion of the first extension portion.

Optionally, the first busbar still includes first electric connecting portion, first electric connecting portion set up in the extending direction of second extension, the second busbar includes second electric connecting portion, second electric connecting portion set up in on the extending direction that the second busbar deviates from exhaust film one side, and with exhaust film interval sets up, laminated glass still includes electric connecting piece, electric connecting piece respectively with first electric connecting portion with second electric connecting portion electricity is connected.

Optionally, the material of the exhaust film is the same as the material of the middle layer.

Optionally, an exhaust groove is formed in the exhaust film.

Optionally, the depth of the exhaust groove ranges from 0.02mm to 0.05mm.

Optionally, if the electric heating element is located on a side of the interlayer adjacent to the first glass plate, the exhaust film is disposed between the second bus bar and the first glass plate; if the electrical heating element is located on the interlayer on a side near the second glass sheet, the vent film is disposed between the second bus bar and the second glass sheet.

Optionally, the length of the exhaust film ranges from 15cm to 20cm, and the width ranges from 8mm to 15mm.

Optionally, the thickness of the venting film ranges from less than 0.5mm.

Optionally, the first bus bar and the second bus bar together form a surrounding to the perspective area of the laminated glass, so that any connecting line from the center point to the edge of the laminated glass can intersect with the first bus bar or the second bus bar.

In a second aspect, the present application also provides a method for preparing laminated glass, the method for preparing laminated glass comprising:

providing an intermediate layer, wherein an electric heating element, a first bus bar and a second bus bar are arranged on the same side of the intermediate layer;

providing a first glass plate and a second glass plate, and laminating the first glass plate and the second glass plate to ensure that the first glass plate and the second glass plate are connected through the interlayer;

and providing an exhaust film, wherein the exhaust film covers the part of the second bus bar and the part of the first bus bar on the middle layer before the first glass plate and the second glass plate are combined, and the exhaust film extends to the edge of the middle layer.

Optionally, after the first glass plate and the second glass plate are laminated, the method further comprises the following steps:

trimming the portion of the intermediate layer and the exhaust film protruding the edge of the first glass plate or the second glass plate;

vacuumizing the gas between the first glass plate and the second glass plate;

and pressing the first glass plate and the second glass plate subjected to vacuum pumping treatment in a certain temperature and pressure environment to form laminated glass.

Optionally, the portion of the second bus bar located on the intermediate layer is covered by the exhaust film, specifically:

at least a portion of the first bus bar forms a barrier to at least a portion of the second bus bar, the at least a portion of the first bus bar being closer to an edge of the intermediate layer than the blocked portion of the second bus bar, the blocked portion of the second bus bar being covered with the vent film.

Optionally, the covering the portion of the second bus bar and the portion of the first bus bar on the intermediate layer with the exhaust film specifically includes:

at least a portion of the first busbar forms a barrier to at least a portion of the second busbar, the at least a portion of the first busbar being closer to an edge of the intermediate layer than the blocked portion of the second busbar, the blocked portion of the second busbar being covered with the vent film;

and extending the strip-shaped exhaust film to the first bus bar along the length direction of the blocked part of the second bus bar, and covering the part of the first bus bar in the extending direction.

In a third aspect, the present application also provides a vehicle comprising a frame for carrying the laminated glass of the first aspect and a laminated glass of the first aspect.

Drawings

For a clearer description of the technical solutions in the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic top view of a laminated glass according to an embodiment of the present application.

Fig. 2 is an enlarged partial schematic view of the dashed box in fig. 1.

Fig. 3 is a schematic cross-sectional view of an exhaust film according to an embodiment of the present application.

Fig. 4 is a schematic cross-sectional view taken along line II-II in fig. 2.

Fig. 5 is a schematic cross-sectional view of a laminated glass according to an embodiment of the present application.

Fig. 6 is a schematic flow chart of a method for preparing laminated glass according to an embodiment of the present application.

Fig. 7 is a schematic top view of a vehicle according to an embodiment of the present application.

Reference numerals illustrate: laminated glass-1, first glass plate-11, second glass plate-12, interlayer-13, first bus bar-14, first extension portion-141, bent portion-142, second extension portion-143, first electrical connection portion-144, second bus bar-15, second electrical connection portion-151, exhaust film-16, exhaust groove-161, electrical heating element-17, electrical connection member-18, vehicle-2, frame-21.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1 and 2, fig. 1 is a schematic top view of a laminated glass according to an embodiment of the present application; fig. 2 is an enlarged partial schematic view of the dashed box in fig. 1. The laminated glass 1 comprises a first glass plate 11, a second glass plate 12, an intermediate layer 13, a first bus bar 14, a second bus bar 15 and an exhaust film 16; the first glass plate 11 and the second glass plate 12 are connected by the interlayer 13; the middle layer 13 is provided with an electric heating element 17, the first bus bar 14 and the second bus bar 15 are arranged on one side of the middle layer 13 where the electric heating element 17 is located and are respectively electrically connected with the electric heating element 17, and the first bus bar 14 and the second bus bar 15 are not contacted with each other; the exhaust film 16 covers a part of the second bus bar 15 and a part of the first bus bar 14 and extends to the edge of the intermediate layer 13.

The laminated glass 1 may be applied to a vehicle, and the first bus bar 14 and the second bus bar 15 are generally disposed along the edges of the first glass plate 11 or the second glass plate 12 as shown in fig. 1 so as not to obstruct the view of the driver of the vehicle or the person in the vehicle. The first bus bar 14 and the second bus bar 15 are typically welded by double-layer bus bars, and the thickness of each bus bar is 1.0mm, wherein the first bus bar 14 and the second bus bar 15 may be partially embedded in the intermediate layer 13, for example, the first bus bar 14 and the second bus bar 15 are embedded in the intermediate layer 13 by 0.2-0.4mm, and are exposed on the surface of the intermediate layer 13 by 0.6-0.8mm. The lengths of the first bus bar 14 and the second bus bar 15 are generally longer, so that the first bus bar 14 and the second bus bar 15 need to extend around the periphery of the first glass plate 11 or the second glass plate 12, and in order to avoid the first bus bar 14 and the second bus bar 15 from contacting each other and shorting, the first bus bar 14 and the second bus bar 15 are spaced apart, and the spacing is smaller than 40mm, there is at least a portion of the first bus bar 14 surrounding the second bus bar 15, or at least a portion of the second bus bar 15 surrounding the first bus bar 14.

In the present embodiment, the intermediate layer 13 is provided with the electric heating element 17, and the positive electrode and the negative electrode of the electric heating element 17 are electrically connected to the first bus bar 14 and the second bus bar 15, respectively, to form a part of a circuit. The electric heating element 17 may be a heating resistance wire, a heating conductive film, a transparent conductive oxide film, or the like, and may generate heat according to the current transmitted by the first bus bar 14 and the second bus bar 15, so as to achieve the purpose of heating the first glass plate 11 and the second glass plate 12, thereby effectively removing rain, snow, fog, frost, or the like on the first glass plate 11 and the second glass plate 12, and improving driving safety. It will be appreciated that in other possible embodiments, the laminated glass 1 may further comprise other functional elements electrically connected to the first busbar 14 and the second busbar 15, respectively, to perform other functions, which the present application does not limit.

Specifically, the first bus bar 14 is schematically illustrated as being surrounded by at least a portion of the second bus bar 15. In the related art, in the process of pressing the first glass plate 11 and the second glass plate 12, since the first bus bar 14 surrounds at least a portion of the second bus bar 15, a path of the second bus bar 15 exhausting toward the edge of the intermediate layer 13 is blocked by the first bus bar 14, that is, an exhausting path shown by a dashed arrow in fig. 2, bubbles are easily formed after the first glass plate 11 and the second glass plate 12 are pressed.

In this embodiment, as shown in fig. 2, the exhaust film 16 covers a part of the second bus bar 15 and a part of the first bus bar 14 and extends to the edge of the intermediate layer 13, so that gas can be exhausted along the exhaust film 16 to the outside of the laminated glass 1 during the lamination process of the first glass plate 11 and the second glass plate 12, thereby achieving the purpose of reducing the bubble rate of the laminated glass 1 finally formed.

It can be appreciated that, in the present embodiment, during the formation of the laminated glass 1, the gas on both sides of the second bus bar 15 can be exhausted by the exhaust film 16 along the extending direction of the exhaust film 16, so that the bubbles generated by shielding the first bus bar 14 are prevented from being retained in the laminated glass 1, and the bubble rate of the laminated glass 1 finally formed is reduced.

For example, the first glass plate 11 is placed on a lamination stage, and a convex back lamination stage of the first glass plate 11 is provided; laying the intermediate layer 13 with the first and second bus bars 14, 15 arranged on the first glass plate 11, with the first and second bus bars 14, 15 disposed away from the first glass plate 11; the exhaust film 16 is correspondingly laid on the second bus 15; the second glass plate 12 is placed on the first glass plate 11, and trimming, ferrules, cold drawing, initial pressing and repressing are performed to finally form the laminated glass 1.

Specifically, trimming means trimming the portions of the interlayer 13 and the exhaust film 16 protruding from the edges of the first glass plate 11 or the second glass plate 12 so that the interlayer 13 and the exhaust film 16 are aligned with the edges of the first glass plate 11 and the second glass plate 12; the ferrule means that the edges of the first glass plate 11 and the second glass plate 12 after the lamination are sleeved with vacuum rubber rings, so that the edges of the first glass plate 11 and the second glass plate 12 are completely wrapped by the vacuum rubber rings; cold pumping means that after the vacuum rubber ring is connected with external vacuum generating equipment, the space between the first glass plate 11 and the second glass plate 12 is vacuumized; initial press refers to initially pressing the first glass plate 11 and the second glass plate 12 at a certain temperature and a first pressure; repressing refers to pressing the first glass plate 11 and the second glass plate 12 at a certain temperature and a second pressure, and in general, the first pressure is smaller than the second pressure.

The present application makes experimental comparisons with the laminated glass 1 provided in the present application and the laminated glass 1 in the related art, in which the exhaust film 16 is not provided, and experimental data are shown in table 1 below.

Table 1 comparative experimental data table

	Related art laminated glass 1	Laminated glass 1 of the present application
			Number of combined sheets	120	200
Number 1 of laminated glass with bubbles	72	1
			Bubble rate	60％	0.50％

It can be seen that, in the laminated glass 1 in which the exhaust film 16 is not provided, the laminated glass 1 in which bubbles appear is generally more than 50% of the total number of laminated sheets, specifically, up to 60% as shown in table 1, and the product yield of the laminated glass 1 is seriously affected. The laminated glass 1 provided by the application greatly reduces the proportion of the laminated glass 1 with bubbles to the total number of pieces as low as 0.5% due to the arrangement of the exhaust film 16.

In a possible embodiment, referring again to fig. 2, at least a portion of the first bus bar 14 forms a barrier to at least a portion of the second bus bar 15, at least a portion of the first bus bar 14 is closer to the edge of the intermediate layer 13 than the portion of the second bus bar 15 that is blocked, and the vent film 16 covers the portion of the second bus bar 15 that is blocked.

It will be appreciated that in this embodiment, at least a portion of the first bus bar 14 is closer to the edge of the intermediate layer 13 than the portion of the second bus bar 15 that is blocked, i.e. after the first glass plate 11 and the second glass plate 12 are laminated, the first bus bar 14 blocks the second bus bar 15, so that when the gas located inside the second bus bar 15 is discharged outwards, the first bus bar 14 needs to be bypassed in addition to the second bus bar 15, resulting in an increased difficulty in gas discharge.

Specifically, the exhaust film 16 covers the blocked portion of the second bus bar 15, in other words, the orthographic projection of the exhaust film 16 on the intermediate layer 13 covers the blocked portion of the second bus bar 15, so that the bubbles that would be accumulated at the second bus bar 15 can be discharged along the gap generated by adding the exhaust film, and the exhaust film 16 can discharge the gas around the portion of the second bus bar 15 to the edge of the intermediate layer 13 along the extending direction of the exhaust film 16. It can be appreciated that the orthographic projection of the exhaust film 16 on the first glass plate 11 covers the blocked portion of the second bus 15, so that the gas on both sides of the blocked portion of the second bus 15 can be exhausted through the exhaust film 16, and the difficulty of exhausting the gas is greatly reduced.

In one possible embodiment, referring again to fig. 2, the exhaust film 16 is in a strip shape, and the exhaust film 16 extends toward the first bus bar 14 along the length direction of the portion of the second bus bar 15 that is blocked, and covers the portion of the first bus bar 14 in the extending direction.

It will be appreciated that, in general, the first bus bar 14 or the second bus bar 15 is strip-shaped, and in order to match the shape of the first bus bar 14 or the second bus bar 15, in this embodiment, the shape of the exhaust film 16 is also strip-shaped. It will be appreciated that, since the first bus bar 14 and the second bus bar 15 are disposed along the edge of the intermediate layer 13, the first bus bar 14 blocks the exhaust path of the gas inside the second bus bar 15 in the width direction toward the edge of the intermediate layer 13 as indicated by the dotted arrow in fig. 2 during lamination of the first glass plate 11 and the second glass plate 12.

Therefore, in the present embodiment, on the one hand, the exhaust film 16 extends toward the first bus bar 14 along the longitudinal direction of the portion where the second bus bar 15 is blocked, and more gas on both sides of the portion where the second bus bar 15 is blocked by the first bus bar 14 can be exhausted along the exhaust film 16 toward the edge of the intermediate layer 13; on the other hand, the exhaust film 16 covers the portion of the first bus bar 14 in the extending direction, avoiding the exhaust route of the second bus bar 15 from being blocked by the first bus bar 14.

In one possible embodiment, referring to fig. 2 again, the portion of the first bus bar 14 that forms the barrier for the second bus bar 15 includes a first extension portion 141, a bending portion 142 and a second extension portion 143, the first extension portion 141 is connected to one side of the bending portion 142 in a bending manner, the second extension portion 143 is connected to the other side of the bending portion 142 in a bending manner, the exhaust film 16 extends toward the first extension portion 141 along the length direction of the portion of the second bus bar 15 that is blocked, and the exhaust film cover 16 covers the portion of the second bus bar 15 that is blocked and the portion of the first extension portion 141.

Specifically, since the first bus bar 14 and the second bus bar 15 are usually led out from the corners or the portions adjacent to the corners of the laminated glass 1, the first bus bar 14 is likely to block the second bus bar 15 or the second bus bar 15 is likely to block the first bus bar 14 at the corner portions of the intermediate layer 13, correspondingly. In this embodiment, as shown in fig. 2, the portion of the first bus bar 14 at the bending portion of the intermediate layer 13 includes the first extension portion 141, the bending portion 142, and the second extension portion 143, which form a barrier to the second bus bar 15.

It can be appreciated that, in the present embodiment, the exhaust film 16 extends toward the first extension 141 along the length direction of the portion where the second bus bar 15 is blocked, so that the gas blocked by the first extension 141, the bent portion 142, and the second extension 143 of the second bus bar 15 can be exhausted toward the intermediate layer 13 through the exhaust film 16.

In one possible embodiment, referring to fig. 2 again, the first bus bar 14 further includes a first electrical connection portion 144, the first electrical connection portion 144 is disposed in an extending direction of the second extension portion 143, the second bus bar 15 includes a second electrical connection portion 151, the second electrical connection portion 151 is disposed in an extending direction of a side of the second bus bar 15 facing away from the exhaust film 16 and is spaced from the exhaust film 16, and the laminated glass 1 further includes electrical connectors 18, where the electrical connectors 18 are electrically connected to the first electrical connection portion 144 and the second electrical connection portion 151, respectively.

Specifically, the electrical connectors 18 are electrically connected to the first electrical connection portion 144 and the second electrical connection portion 151, respectively, so that the first bus bar 14 and the second bus bar 15 can be electrically connected to electronic components other than the laminated glass 1, respectively, to realize various functions of the laminated glass 1. For example, in the present embodiment, the electrical connector 18 is configured to transmit an electric current to the first bus bar 14 through the first electrical connector 144, and then pass through the electrical heating element 17 electrically connected thereto, and then transmit the electric current back to the electrical connector 18 through the second bus bar 15 and the second electrical connector 151, so as to form a circuit loop, thereby realizing the function of heating the first glass plate 11 and the second glass plate 12 by the electrical heating element 17.

It will be appreciated that in some embodiments, the exhaust film 16 may cover the second electrical connection portion 151, or the exhaust film 16 may not cover the second electrical connection portion 151, and since the electrical connection member 18 is electrically connected to the first electrical connection portion 144 and the second electrical connection portion 151 through wires, respectively, so that the laminated glass 1 is located at a greater thickness of the first electrical connection portion 144 or the second electrical connection portion 151, in preferred embodiments, the exhaust film 16 does not cover the second electrical connection portion 151, and the second electrical connection portion 151 is disposed in an extending direction of the second bus bar 15 away from the exhaust film 16 and is spaced from the exhaust film 16, thereby preventing the exhaust film 16 from covering the second electrical connection portion 151.

In one possible embodiment, the material of the exhaust film 16 is the same as that of the intermediate layer 13.

Specifically, the intermediate layer 13 is a thermoplastic intermediate layer, and the material of the intermediate layer may be any one or more of PVB, EVA, PU, and the intermediate layer 13 has a certain viscosity and softness, so that the first glass plate 11 and the second glass plate 12 can be well connected and fixed. It can be appreciated that the material of the exhaust film 16 is the same as that of the intermediate layer 13, and in the process of heating and pressurizing the first glass plate 11 and the second glass plate 12 after lamination to form laminated glass, the exhaust film 16 and the intermediate layer 13 with the same material can be melted to form a whole, so that the exhaust film 16 is difficult to be perceived in a state of visual inspection after the aim of assisting in exhaust is achieved, and therefore, the laminated glass is further ensured not to have optical flaws at the position of the exhaust film 16.

In one possible embodiment, please refer to fig. 3, fig. 3 is a schematic cross-sectional view of an exhaust film according to an embodiment of the present application. The exhaust film 16 is provided with an exhaust groove 161.

In the present embodiment, the extending direction of the exhaust groove 161 is the same as the extending direction of the exhaust film 16, so that the gas is exhausted in the extending direction of the exhaust film 16. It will be appreciated that the vent groove 161 may be a gap between the vent film 16 and the glass plate or the interlayer, or may be a groove machined on the surface of the vent film 16, where the vent groove 161 can further improve the venting effect of the vent film 16, so that the gas is exhausted along the vent groove 161, and the purpose of further reducing the bubble rate of the laminated glass 1 that is finally formed is achieved.

It is understood that the vent grooves 161 may be any shape as long as they do not affect the vent effect of the vent film 16, which is not limited in this application.

In one possible embodiment, the recess depth of the vent groove 161 toward the side facing away from the surface of the vent film 16 ranges from 0.02mm to 0.05mm.

It will be appreciated that the depth of the recess 161 in the side facing away from the surface of the vent film 16 should not be too great to avoid affecting the optical properties of the laminated glass 1 in the portion where the vent film 16 is located.

Specifically, the depth of the recess of the vent groove 161 facing away from the surface of the vent film 16 may be 0.030mm, 0.033mm, 0.042mm, 0.045mm, etc., which is not limited in this application.

In one possible embodiment, please refer to fig. 4 and 5 together, fig. 4 is a schematic cross-sectional view along line II-II in fig. 2; fig. 5 is a schematic cross-sectional view of a laminated glass according to an embodiment of the present application. If the electric heating element 17 is located on the side of the interlayer 13 close to the first glass plate 11, the exhaust film 16 is disposed between the second bus bar 15 and the first glass plate 11; if the electric heating element 17 is located on the side of the interlayer 13 close to the second glass plate 12, the exhaust film 16 is disposed between the second bus bar 15 and the second glass plate 12.

The first bus bar 14 and the second bus bar 15 are typically disposed on the same side of the intermediate layer 13 as the electric heating element 17, so that the first bus bar 14 and the second bus bar 15 are electrically connected to the electric heating element 17.

Specifically, as shown in fig. 4, the electric heating element 17 is located on the side of the intermediate layer 13 near the first glass plate 11, the first bus bar 14 and the second bus bar 15 are also disposed on the side of the intermediate layer 13 near the first glass plate 11, and bubbles are easily generated between the first glass plate 11 and the intermediate layer 13 during the lamination process of the first glass plate 11 and the second glass plate 12, so that the exhaust film 16 is disposed between the second bus bar 15 and the first glass plate 11; similarly, as shown in fig. 5, the electric heating element 17 is located on the side of the intermediate layer 13 near the second glass plate 12, the first bus bar 14 and the second bus bar 15 are also disposed on the side of the intermediate layer 13 near the second glass plate 12, and bubbles are easily generated between the second glass plate 12 and the intermediate layer 13 during the lamination process of the first glass plate 11 and the second glass plate 12, so that the exhaust film 16 is disposed between the second bus bar 15 and the second glass plate 12, so that the excessive gas can be effectively exhausted, and the bubble rate of the laminated glass 1 can be reduced.

In one possible embodiment, the length of the venting membrane 16 ranges from 15cm to 20cm and the width ranges from 8mm to 15mm.

It will be appreciated that the length and width dimensions of the vent film 16 should not be too large, which would easily affect the lamination of the first glass plate 11 and the second glass plate 12 during the lamination process of the first glass plate 11 and the second glass plate 12, and may increase the overall thickness of the laminated glass 1 or affect the optical performance of the laminated glass 1; meanwhile, the length and width of the exhaust film 16 should not be too small, otherwise the exhaust effect of the exhaust film 16 is easily affected.

Further, the length of the exhaust film 16 may be 16cm-18cm, and the width of the exhaust film 16 may be 10mm-12mm; specifically, the length of the air-discharging film 16 may be 16.2cm, 16.6cm, 17.3cm, 17.8cm, etc., and the width of the air-discharging film 16 may be 10.4mm, 10.7mm, 11.5mm, 11.9mm, etc., which is not limited in this application.

In one possible embodiment, the thickness of the venting membrane 16 ranges from less than 0.5mm.

It will be appreciated that, as in the previous embodiment, the thickness of the exhaust film 16 should not be too large, which would easily affect the press-fit condition of the first glass plate 11 and the second glass plate 12 during the lamination process of the first glass plate 11 and the second glass plate 12, and may increase the overall thickness of the laminated glass 1 or affect the optical performance of the laminated glass 1; meanwhile, the thickness of the exhaust film 16 should not be too small, otherwise, the exhaust groove 161 formed on the exhaust film 16 is easily affected, and the exhaust effect of the exhaust film 16 is affected.

Further, the thickness of the exhaust film 16 may also be in the range of less than 0.24mm; specifically, the thickness of the exhaust film 16 may be 0.22mm, 0.21mm, 0.13mm, 0.10mm, etc., which is not limited in this application.

In one possible embodiment, the first busbar 14 and the second busbar 15 together form a surrounding for the see-through area of the laminated glass 1, so that any line from the center point to the edge of the laminated glass 1 will intersect the first busbar 14 or the second busbar 15.

It is understood that the see-through region of the laminated glass 1 refers to a region in which an in-vehicle person can directly observe an outside environment of the vehicle through the see-through region of the laminated glass 1 when the laminated glass 1 is mounted on the vehicle. The first bus bar 14 and the second bus bar 15 together form a surrounding to the perspective area of the laminated glass 1, so that the arrangement of the first bus bar 14 and the second bus bar 15 can be prevented from affecting the observation of the environment outside the vehicle by personnel in the vehicle to the greatest extent. Meanwhile, any connection line from the center point to the edge of the laminated glass 1 may intersect the first bus bar 14 or the second bus bar 15, so that a functional element, such as the electric heating element 17, disposed in the transparent area of the laminated glass 1 may be conveniently electrically connected to the first bus bar 14 or the second bus bar 15, to form a circuit loop, and implement one or more functions.

In this embodiment, although this arrangement may cause the first bus bar 14 or the second bus bar 15 to be blocked, due to the arrangement of the exhaust film 16, the bubble rate of the laminated glass 1 is reduced, so that the functional component disposed in the perspective area of the laminated glass 1 is convenient to electrically connect with the first bus bar 14 or the second bus bar 15, and meanwhile, a higher yield of the laminated glass 1 can be achieved, and the difficulty in the production process of the laminated glass 1 to implement one or more functions is reduced.

The application also provides a method for preparing laminated glass, please refer to fig. 6, fig. 6 is a schematic flow chart of a method for preparing laminated glass according to an embodiment of the application. The preparation method of the laminated glass comprises steps S601, S602 and S603, wherein the steps S601, S602 and S603 are specifically described as follows.

S601, providing an intermediate layer 13, wherein an electric heating element 17, a first bus bar 14 and a second bus bar 15 are arranged on the same side of the intermediate layer 13;

s602, providing a first glass plate 11 and a second glass plate 12, and laminating the first glass plate 11 and the second glass plate 12, so that the first glass plate 11 and the second glass plate 12 are connected through the interlayer 13;

s603, providing an exhaust film 16, wherein the exhaust film 16 covers the portion of the second bus bar 15 and the portion of the first bus bar 14 located on the intermediate layer 13 before the first glass plate 11 and the second glass plate 12 are laminated, and the exhaust film 16 is extended to the edge of the intermediate layer 13.

Specifically, the intermediate layer 13, the first bus bar 14, the second bus bar 15, the first glass plate 11, the exhaust film 16, and the second glass plate 12 refer to the above description, and are not repeated here. It should be noted that, after the intermediate layer 13 is laid on the first glass plate 11, the positions of the first electrical connection portion 144, the second electrical connection portion 151, and the electrical connection member 18 may be determined according to the process card, and the first electrical connection portion 144, the second electrical connection portion 151, and the electrical connection member 18 refer to the above description, which is not repeated herein.

In one possible embodiment, after the first glass plate 11 and the second glass plate 12 are laminated, the method further includes the following steps:

trimming the portions of the intermediate layer 13 and the exhaust film 16 protruding from the edges of the first glass plate 11 or the second glass plate 12;

evacuating the gas between the first glass plate 11 and the second glass plate 12;

and pressing the first glass plate 11 and the second glass plate 12 subjected to the vacuumizing treatment in a certain temperature and pressure environment to form the laminated glass 1.

Specifically, the above process steps are described above, and are not repeated here.

In a possible embodiment, the portion of the second bus bar 15 located on the intermediate layer 13 is covered by the exhaust film 16, specifically:

at least part of the first bus bar 14 forms a barrier to at least part of the second bus bar 15, at least part of the first bus bar 14 is closer to the edge of the intermediate layer 13 than the blocked part of the second bus bar 15, and the blocked part of the second bus bar 15 is covered with the exhaust film 16.

Specifically, the exhaust film 16 covers the blocked portion of the second bus bar 15, in other words, the orthographic projection of the exhaust film 16 on the intermediate layer 13 covers the blocked portion of the second bus bar 15, so that the bubbles that would be accumulated at the second bus bar 15 can be discharged along the gap generated by adding the exhaust film, and the exhaust film 16 can discharge the gas around the portion of the second bus bar 15 to the edge of the intermediate layer 13 along the extending direction of the exhaust film 16. It will be appreciated that the orthographic projection of the exhaust film 16 on the first glass plate 11 covers the blocked portion of the second bus bar 15, so that the gas on both sides of the blocked portion of the second bus bar 15 can be exhausted through the exhaust film 16, and the risk that the gas cannot be exhausted is reduced.

In a possible embodiment, the portion of the second bus bar 15 and the portion of the first bus bar 14 that are located on the intermediate layer 13 are covered by the exhaust film 16, specifically:

at least part of the first bus bar 14 forms a barrier to at least part of the second bus bar 15, at least part of the first bus bar 14 is closer to the edge of the intermediate layer 13 than the blocked part of the second bus bar 15, and the blocked part of the second bus bar 15 is covered with the exhaust film 16;

the exhaust film 16 in the form of a strip is extended toward the first bus bar 14 along the length direction of the portion where the second bus bar 15 is blocked, and covers the portion of the first bus bar 14 in the extending direction.

In the present embodiment, on the one hand, the exhaust film 16 extends toward the first bus bar 14 along the longitudinal direction of the portion where the second bus bar 15 is blocked, so that more gas on both sides of the portion where the second bus bar 15 is blocked by the first bus bar 14 can be exhausted along the exhaust film 16 toward the edge of the intermediate layer 13; on the other hand, the exhaust film 16 covers the portion of the first bus bar 14 in the extending direction, avoiding the exhaust route of the second bus bar 15 from being blocked by the first bus bar 14.

Referring to fig. 7, fig. 7 is a schematic top view of a vehicle according to an embodiment of the present application. The vehicle 2 comprises a frame 21 and a laminated glass 1 as described above, the frame 21 being intended to carry the laminated glass 1. Specifically, the laminated glass 1 is described above, and will not be described herein.

The principles and embodiments of the present application are described herein with specific examples applied thereto, the description of the above embodiments being merely for aiding in understanding of the core ideas of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A laminated glass, characterized in that the laminated glass comprises a first glass plate, a second glass plate, an interlayer, a first bus bar, a second bus bar and an exhaust film;

the exhaust film covers part of the second bus bar and part of the first bus bar and extends to the edge of the middle layer;

at least a portion of the first busbar forms a barrier to at least a portion of the second busbar, the at least a portion of the first busbar being closer to an edge of the intermediate layer than the blocked portion of the second busbar, the vent film overlying the blocked portion of the second busbar;

the exhaust film extends to a first bus bar along the length direction of the blocked part of the second bus bar and covers the part of the first bus bar in the extending direction;

and an exhaust groove is formed in the exhaust film.

2. The laminated glass according to claim 1, wherein the vent film is in the form of a strip.

3. The laminated glass according to claim 2, wherein the portion of the first bus bar that forms the barrier to the second bus bar includes a first extension portion, a bent portion, and a second extension portion, the first extension portion is bent and connected to one side of the bent portion, the second extension portion is bent and connected to the other side of the bent portion, the exhaust film extends toward the first extension portion along a length direction of the portion of the second bus bar that is blocked, and the exhaust film covers the portion of the second bus bar that is blocked and the portion of the first extension portion.

4. The laminated glass according to claim 3, wherein the first bus bar further comprises a first electrical connection portion provided in an extending direction of the second extension portion, the second bus bar comprises a second electrical connection portion provided in an extending direction of the second bus bar on a side facing away from the exhaust film and spaced apart from the exhaust film, and the laminated glass further comprises electrical connection members electrically connected to the first electrical connection portion and the second electrical connection portion, respectively.

5. The laminated glass of claim 1, wherein the vent film is the same material as the interlayer.

6. The laminated glass of claim 1, wherein the vent groove has a depth ranging from 0.02mm to 0.05mm.

7. The laminated glass of claim 1, wherein the vent film is disposed between the second bus bar and the first glass sheet if the electrical heating element is positioned on a side of the interlayer adjacent to the first glass sheet; if the electrical heating element is located on the interlayer on a side near the second glass sheet, the vent film is disposed between the second bus bar and the second glass sheet.

8. A laminated glass according to claim 1, wherein the vent film has a length in the range of 15cm to 20cm and a width in the range of 8mm to 15mm.

9. The laminated glass of claim 1, wherein the thickness of the vent film ranges from less than 0.5mm.

10. A laminated glass according to any one of claims 1 to 9, wherein the first busbar and the second busbar together form an enclosure for a see-through region of the laminated glass such that any line from a centre point to an edge of the laminated glass intersects either the first busbar or the second busbar.

11. A method for producing laminated glass, comprising:

providing an exhaust film, covering a portion of the second bus bar and a portion of the first bus bar on the intermediate layer with the exhaust film before the first glass plate and the second glass plate are laminated, and extending the exhaust film to the edge of the intermediate layer;

the exhaust film covers the part of the second bus bar and the part of the first bus bar on the middle layer, specifically:

extending the exhaust film to a first bus bar along a length direction of a portion where the second bus bar is blocked, and covering the portion of the first bus bar in the extending direction;

and an exhaust groove is formed in the exhaust film.

12. The method of producing a laminated glass according to claim 11, further comprising, after the first glass plate and the second glass plate are laminated, the steps of:

vacuumizing the gas between the first glass plate and the second glass plate;

13. The method for producing a laminated glass according to claim 11, wherein the exhaust film is in a strip shape.

14. A vehicle comprising a frame for carrying a laminated glass as claimed in any one of claims 1 to 13 and a laminated glass.