Laminated glass and method of laminating glass

Abstract

The application discloses a kind of laminated glass and laminated glass's piece method, at least by first glass plate, second glass plate and intermediate layer assembly generation, it is characterized in that, the first glass plate has first surface and second surface oppositely arranged;The second glass plate has third surface and fourth surface oppositely arranged, wherein, the second surface and the third surface oppositely arranged, and the second glass plate is relative to the first glass plate at least part end edge and is inwardly recessed, to form recessed area S1 on the second surface;The intermediate layer is arranged between the first glass plate and the second glass plate, and has extension and covers the extension part of at least part of recessed area S1, the present application guarantees when the driver or passenger escapes and the observation on the field of vision is not hindered when emergency event occurs.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile parts, in particular to laminated glass.

[0002] The present application also relates to a lamination method for producing the laminated glass. BACKGROUND

[0003] There are three common lamination methods for laminated glass for vehicles: edge ring vacuum lamination, vacuum bag vacuum lamination, or roller lamination process. For laminated glass with different sizes of inner and outer sheets, the edge ring cannot achieve edge sealing, so only vacuum bag vacuum lamination or roller lamination process can be used. The vacuum bag vacuum lamination process needs to be sealed and pumped before lamination, and the bag is removed after high pressure, which is a relatively complicated process. It is generally suitable for small quantities, multiple layers, or large specifications of laminated glass. For laminated glass with different sizes of inner and outer sheets, batch production is more suitable for roller lamination process.

[0004] However, the present inventors found that the above-mentioned technology at least has the following technical problems in the process of implementing the technical solutions of the embodiments of the present application:

[0005] For laminated glass with different sizes of inner and outer sheets, laminated glass enters and exits the roller lamination device, and is prone to layer displacement in the flow direction. Moreover, the greater the thickness difference between the two sheets of glass or the smaller the thickness of one of the sheets of glass, the more obvious the roller lamination displacement. When a large-area thick glass-middle layer-small-area thin glass stack structure enters the roller lamination mechanism, the roller first contacts and presses the thick glass, and then contacts the thin glass and the middle layer to form a step. At this time, the roller pressure will extrude the thin glass plate at the step and push the thin glass plate in the opposite direction of the glass flow direction, causing displacement. It is difficult to control the laminated glass stack. Even if the stack structure is point-prebonded, displacement is still prone to occur after roller lamination.

[0006] When laminated glass with different sizes of inner and outer sheets is used as a lift window glass, the lift mechanism is usually bonded to the thick glass plate. When the thick glass plate is broken due to heat strengthening, even if the thin glass plate is intact and not broken, the laminated glass will lose the lift function. In addition, after the thick plate glass is broken due to heat strengthening, the area hidden in the vehicle body that is not covered by the middle layer will fall glass slag or fragments, which will further affect the normal operation of the lift motor system, is not conducive to the handling of certain emergency events, and may affect the vision after breaking or hinder escape. SUMMARY

[0007] The technical problem to be solved by the present application provides a laminated glass, which aims to solve the technical problems of laminated glass hindering vision and escape in the prior art.

[0008] To solve the above technical problems, the present application provides a kind of laminated glass, at least by first glass sheet, second glass sheet and interlayer assembly generates, it is characterized in that, the first glass sheet has the first surface and the second surface of opposite arrangement;The third surface and the fourth surface of the second glass sheet have opposite arrangement;The second surface and the third surface are oppositely arranged, and the second glass sheet is inwardly recessed relative to at least part of the end edge of the first glass sheet, to form recessed area S1 on the second surface;The interlayer is arranged between the first glass sheet and the second glass sheet, and has an extension and covers at least a part of the recessed area S1 of the extension.

[0009] Preferably, the thickness of the first glass sheet is 1.6-5.0 mm; the thickness of the second glass sheet is 0.5-1.2 mm.

[0010] Preferably, the area of the second glass sheet is not greater than 95% of the first glass sheet.

[0011] Preferably, the recessed area S1 is formed with a mounting hole, and the second glass sheet has no hole.

[0012] Preferably, the area of the interlayer is the same as the area of the first glass sheet.

[0013] Preferably, the first glass sheet is a heat-strengthening glass, and the second glass sheet is a chemically strengthened glass.

[0014] Preferably, the laminated glass further comprises a protective layer, and the protective layer is arranged to cover the extension.

[0015] Preferably, the material of the protective layer is one or more of PET, PE, PS and PVC.

[0016] Preferably, the thickness of the protective layer is ≤0.1 mm.

[0017] Preferably, the first glass sheet is formed with a difference between the end edge of the area other than the recessed area S1 and the end edge of the second glass sheet, and the difference is in the range of 0-2.5 mm.

[0018] Preferably, the laminated glass has a first form before assembly, and the laminated glass in the first form further has an auxiliary sheet layer detachably connected to the protective layer.

[0019] 13. Preferably, an adjustment gap is formed between the auxiliary sheet layer and the second glass sheet, and the size of the adjustment gap is 1-6 mm, and the thickness of the auxiliary sheet layer is 0-0.1 mm thicker than the second glass sheet.

[0020] Preferably, the auxiliary sheet layer has a temperature resistance of ≥ 150℃, and preferably, the material of the auxiliary sheet layer is selected from one or more of glass, ceramic, polyphenylene sulfide, polyimide, and polyarylate.

[0021] Preferably, the auxiliary sheet layer has an overhanging portion beyond the end edge of the first glass sheet, the overhanging portion has a width of 20-100mm, and the auxiliary sheet layer and the indented region S1 have the same curvature.

[0022] To solve the above technical problems, the present application also provides a method for laminating a laminated glass, comprising the steps of: obtaining a first curved glass sheet and a second curved glass sheet through a pretreatment process, wherein the first curved glass sheet and the second curved glass sheet have different thicknesses; stacking the first curved glass sheet, an interlayer, and the second curved glass sheet in sequence, and indenting at least part of the end edge of the second curved glass sheet inwardly relative to the first curved glass sheet to form an indented region S1; stacking an auxiliary sheet layer covered with a protective layer to the indented region S1 to form a laminated glass semi-product; and after pre-bonding the laminated glass semi-product, entering a roll laminating device to perform a laminating operation.

[0023] After the laminating operation is completed, the auxiliary sheet layer and the protective layer are separated.

[0024] By adopting the above technical solution, the present application can achieve the following technical effects:

[0025] Since the interlayer is extended to cover the indented region S1, when the first glass sheet is broken by external force impact, at the connection position of the lifting assembly and the outer glass, the lifting assembly can maintain the connection relationship with the interlayer, and the broken outer glass adhered to the interlayer can also be completely maintained on one side of the interlayer, so that the connection between the lifting assembly and the first glass sheet will not be invalid due to the breakage of the first glass sheet, thereby enabling the broken first glass sheet and the second glass sheet bonded on the other side of the interlayer to be successfully lifted under the driving of the lifting assembly, and also avoiding the risk of the broken outer glass falling into the surrounding of the lifting assembly, ensuring that the driver or passenger's escape and observation in the event of an emergency will not be hindered. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described in detail below in conjunction with the drawings and specific embodiments:

[0027] Figure 1 is a partial structural sectional view of the laminated glass of the present application;

[0028] Figure 2 is a structural sectional view of the laminated glass of the present application;

[0029] Figure 3Structure diagram of the laminated glass of the present application in the first state;

[0030] Figure 4 Front view of the laminated glass of the present application;

[0031] Figure 5 Flow direction diagram of the roll lamination of the prior art;

[0032] Figure 6 Flow direction diagram of the roll lamination of one embodiment of the present application;

[0033] Figure 7 Flow direction diagram of the roll lamination of another embodiment of the present application;

[0034] Figure 8 Defect diagram of the roll lamination of the prior art;

[0035] Figure 9 Diagram of the roll lamination of one embodiment of the present application;

[0036] Figure 10 Diagram of the roll lamination of another embodiment of the present application;

[0037] Figure 11 Flow chart of the lamination method of the present application. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0039] The above technical solutions will be described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] Please refer to Figures 1 to 2The embodiment provides a laminated glass assembled by an outer glass plate 100, an inner glass plate 200 and an intermediate layer 300, wherein the outer glass plate 100 has a first surface 101 and a second surface 102 arranged oppositely, the inner glass plate 200 has a third surface 201 and a fourth surface 202 arranged oppositely, the second surface 102 and the third surface 201 are arranged oppositely, and the inner glass plate 200 is inwardly recessed relative to an end edge of the first glass plate to form a recessed area S1 on the second surface 102; the intermediate layer 300 is arranged between the outer glass plate 100 and the inner glass plate 200, and has an extension part 301 extending and covering the recessed area S1, and the extension part 301 is covered with a protective layer 400.

[0041] In one or more embodiments, the recessed area S1 is completely covered by the extension part 301 of the intermediate layer 300, and in other embodiments of the application, the recessed area S1 can also be arranged to be partially covered by the extension part 301 of the intermediate layer 300, and the specific coverage range can include but is not limited to 90%, 80%, 70%, 60% and 50%.

[0042] In one or more embodiments, the laminated glass provided can be used as an automobile side window glass, for example, the first glass plate is arranged towards the outside of the vehicle as the outer glass plate 100, the second glass plate is arranged towards the inside of the vehicle as the inner glass plate 200, and the window glass lifting assembly is clamped in the form of the recessed area S1, for example, a mounting hole P can be formed in the recessed area S1, and the lifting assembly and the mounting hole P are connected by a mechanical connection mode such as bolt connection, so as to realize the mounting between the lifting assembly and the laminated glass.

[0043] For the laminated glass with inconsistent area sizes of the inner and outer glass plates, the lifting assembly is only connected to the outer glass, and for a frameless door glass assembly, if the outer glass plate 100 is broken under external force impact, the lifting assembly will be disconnected due to the breakage of the outer glass plate 100, so that the automobile side window glass cannot be successfully lowered, and the broken part of the outer glass plate 100 will fall into the surrounding of the lifting assembly, further interfering with the lifting assembly, which will cause great obstacles to the driver or passenger in escaping and observing the view in some emergency events.

[0044] The present embodiment can extend the intermediate layer 300 to cover the retracted area S1, so that when the outer glass plate 100 is broken by external force, the lifting assembly can maintain the connection with the intermediate layer 300 at the connection position of the lifting assembly and the outer glass, and the broken outer glass adhered by the intermediate layer 300 can also be completely maintained on one side of the intermediate layer 300, so that the connection between the lifting assembly and the outer glass plate 100 will not be invalid due to the breakage of the outer glass plate 100, thereby enabling the broken outer glass plate 100 and the inner glass plate 200 adhered on the other side of the intermediate layer 300 to be successfully lifted under the driving of the lifting assembly, while avoiding the risk of the broken outer glass falling into the surrounding of the lifting assembly, and ensuring that the driver or passenger can escape and observe the view without being hindered when an emergency occurs.

[0045] Meanwhile, the extension of the intermediate layer 300 can absorb the concentrated stress at the connection position of the lifting assembly and the outer glass to some extent, thereby improving the connection strength.

[0046] In one or more embodiments, the laminated glass provided by the present application can also be used as a vehicle observation window such as a front windshield, a sunroof, a rear windshield, a quarter window, etc.

[0047] The protective layer 400 arranged to cover the extension part 301 can also provide protection for the exposed part of the intermediate layer 300, thereby avoiding pollution or damage.

[0048] Further, the outer glass pane 100 has a thickness that is greater than the thickness of the inner glass pane 200. In one or more embodiments, the thickness of the outer glass pane 100 can be in the range of 1.6 to 5.0 mm; or in the range of 1.4 mm to about 3.85 mm; or in the range of about 1.4 mm to about 3.5 mm; or in the range of about 1.4 mm to about 3.0 mm; or in the range of about 1.4 mm to about 2.8 mm; or in the range of about 1.4 mm to about 2.5 mm; or in the range of about 1.4 mm to about 2.0 mm; or in the range of about 1.5 mm to about 3.85 mm; or in the range of about 1.5 mm to about 3.5 mm; or in the range of about 1.5 mm to about 3.0 mm; or in the range of about 1.5 mm to about 2.8 mm; or in the range of about 1.5 mm to about 2.5 mm; or in the range of about 1.5 mm to about 2.0 mm; or in the range of about 1.6 mm to about 3.85 mm; or in the range of about 1.6 mm to about 3.5 mm; or in the range of about 1.6 mm to about 3.0 mm; or in the range of about 1.6 mm to about 2.8 mm; or in the range of about 1.6 mm to about 2.5 mm; or in the range of about 1.6 mm to about 2.0 mm; or in the range of about 1.8 mm to about 3.5 mm; or in the range of about 2.0 mm to about 3.0 mm.

[0049] In one or more embodiments, the thickness of the inner glass pane 200 can be in the range of 0.5 to 1.2 mm. Or in the range of about 0.2 mm to about 1.2 mm; or in the range of about 0.3 mm to about 1.2 mm; or in the range of about 0.4 mm to about 1.2 mm; or in the range of about 0.5 mm to about 1.2 mm; or in the range of about 0.1 mm to about 1 mm; or in the range of about 0.2 mm to about 1 mm; or in the range of about 0.1 mm to about 0.7 mm; or in the range of about 0.2 mm to about 0.7 mm; or in the range of about 0.3 mm to about 0.7 mm; or in the range of about 0.4 mm to about 0.7 mm; or in the range of about 0.2 mm to about 0.6 mm; or in the range of about 0.3 mm to about 0.6 mm; or in the range of about 0.4 mm to about 0.6 mm; or in the range of about 0.2 mm to about 0.5 mm; or in the range of about 0.3 mm to about 0.5 mm; or in the range of about 0.2 mm to about 0.4 mm.

[0050] It is readily understood that in one or more embodiments, the relative positions of the outer glass pane 100 and the inner glass pane 200 can also be interchanged, i.e., the two glass panes are arranged in reverse.

[0051] The materials used for the outer glass pane 100 and the inner glass pane 200 can be diverse. According to one or more embodiments, the materials used for the outer glass pane 100 and the inner glass pane 200 can be the same material or different materials. In exemplary embodiments, one or both of the outer glass pane 100 and the inner glass pane 200 can be glass (e.g., soda-lime glass, alkali aluminosilicate glass, alkali-containing borosilicate glass, and / or alkali aluminoborosilicate glass) or glass-ceramic. Examples of suitable glass-ceramics include Li20-Al203-Si02system (i.e., LAS system) glass-ceramics; MgO-Al203-Si02system (i.e., MAS system) glass-ceramics; and glass-ceramics comprising a crystalline phase that is any one or more of the following: mullite, spinel, alpha-quartz, beta-quartz solid solution, petalite, lithium disilicate, beta-spodumene, nepheline, and alumina. Additionally, one or both of the outer glass pane 100 and the inner glass pane 200 can be chemically strengthened, thermally strengthened, mechanically strengthened, or a combination thereof. In one or more embodiments, the outer glass pane 100 is un-strengthened (meaning not strengthened by a chemical strengthening, thermal strengthening, or mechanical strengthening process, but can include an annealed substrate), and the inner glass pane 200 is strengthened. In one or more particular embodiments, the outer glass pane 100 is thermally strengthened, and the inner glass pane 200 is chemically strengthened.

[0052] In particular, the combination of various strengthening means can meet the strength requirements of the laminated glass under various installation conditions, such as frameless door assemblies, etc.

[0053] In one or more embodiments, the interlayer 300 comprises a material selected from the group consisting of polyvinyl butyral (PVB) resin, ethylene vinyl acetate copolymer (EVA), ionomeric polymer, polyvinyl chloride copolymer, and thermoplastic polyurethane (TPU). The thickness of the interlayer 300 can be in the range of about 0.3 mm to about 2 mm, or 0.35 to about 0.76 mm.

[0054] In one embodiment, the surface CS of the chemically strengthened glass or glass-ceramic substrate can be 300 MPa or greater, such as 400 MPa or greater, 450 MPa or greater, 500 MPa or greater, 550 MPa or greater, 600 MPa or greater, 650 MPa or greater, 700 MPa or greater, 750 MPa or greater, or 800 MPa or greater. In one or more embodiments, the surface CS in the strengthened glass or glass-ceramic substrate is the maximum CS.

[0055] The DOL of the chemically strengthened glass or glass-ceramic substrate can be about 15 pm or more, 20 pm or more (e.g., 25 pm, 30 pm, 35 pm, 40 pm, 45 pm, 50 pm or more). In one or more embodiments, the strengthened glass or glass-ceramic substrate can exhibit a maximum CT value of 10 MPa or more, 20 MPa or more, 30 MPa or more, 40 MPa or more (e.g., 42 MPa, 45 MPa, or 50 MPa or more) but less than 100 MPa (e.g., 95, 90, 85, 80, 75, 70, 65, 60, 55 MPa or less).

[0056] In one or more embodiments, the second glass sheet has an area that is no more than 95% of the first glass sheet, or no more than 90%, or no more than 85%, or no more than 80%, or no more than 75%, or no more than 70%, or no more than 65%.

[0057] In one or more embodiments, the area of the intermediate layer 300 is the same as the area of the first glass sheet.

[0058] In one or more embodiments, the material of the protective layer 400 is one or more of PET, PE, PS and PVC.

[0059] In one or more embodiments, the thickness of the protective layer 400 is ≤0.1 mm, controlling the thickness of the protective layer 400 at a lower level, while ensuring that it has sufficient protective performance, facilitates the installation and connection of the lifting assembly and the outer glass sheet 100.

[0060] In one or more embodiments, as shown in Figure 4 The outer glass sheet 100 forms a difference B between the end edge of the area other than the retracted area S1 and the end edge of the inner glass sheet 200, and the difference ranges from 0 to 2.5 mm. Controlling the difference within a smaller range is conducive to the overall aesthetics of the laminated glass, while avoiding the risk of impact breakage of the thinner inner glass sheet 200 protruding outside the edge of the outer glass sheet 100 when the edge of the laminated glass is impacted from the outside.

[0061] In one or more embodiments, as shown in Figure 3 The laminated glass has a first form before assembly, and the laminated glass in the first form also has an auxiliary sheet layer 500 detachably connected to the protective layer 400.

[0062] In this combination of the laminated glass of the present embodiment, the role and effect of the auxiliary sheet layer 500 are explained:

[0063] As shown in Figure 8The laminating method of the present application comprises the following steps:

[0064] A1: the original glass is processed by cutting, edge grinding, shaping and strengthening to obtain a first curved glass plate and a second curved glass plate, the thickness of the first curved glass plate is greater than that of the second curved glass plate;

[0065] A2: the first curved glass plate, the intermediate layer 300 and the second curved glass plate are stacked in sequence, and the second curved glass plate after stacking is inwardly indented relative to at least part of the end edge of the first curved glass plate to form an indentation area S1;

[0066] A3: the auxiliary sheet layer 500 covered with the protective layer 400 is stacked to the indentation area S1 to form a laminated glass semi-product; and an adjustment gap D of 1-6 mm is formed between the auxiliary sheet layer 500 and the second glass plate;

[0067] A4: the laminated glass semi-product is heated and pre-bonded, at least two bonding points are formed between the auxiliary sheet layer 500 and the first curved glass plate, and at least two bonding points are formed between the first curved glass plate and the second curved glass plate;

[0068] A5: after the heating and pre-bonding, the laminated glass semi-product is sent to a roller laminating device for roller laminating;

[0069] A6: after the roller laminating, high-pressure treatment in an autoclave is carried out;

[0070] A7: the auxiliary sheet layer 500 and the protective layer 400 are separated to obtain a laminated glass product.

[0071] Wherein:

[0072] The heating and pre-bonding specifically refers to local point heating treatment on the two outer surfaces of the laminated glass on the transmission line by using a heating device, so that the intermediate layer 300 at the heating point is partially melted to bond the first curved glass plate and the second curved glass plate, so as to achieve the purpose of pre-positioning.

[0073] Figure 5 The laminated glass assembly is not provided with an auxiliary sheet layer 500, and the roller laminating process is specifically to pass the laminated glass semi-product through the gap between the upper roller 21 and the lower roller 22 of the roller laminating device to press the two surfaces of the laminated glass to achieve the purpose of laminating.

[0074] As Figure 8As shown, since the outer glass plate 100 and the inner glass plate 200 are both pre-bent before the lamination process, in one embodiment, the outer glass plate 100 is placed on the convex side, the inner glass plate 200 is placed on the concave side, the thickness of the outer glass plate 100 is greater than the thickness of the inner glass plate 200, in order to make the shape of the inner glass plate 200 match the shape of the outer glass plate 100, and considering the problem that the outer periphery of the thinner inner glass plate 200 is easy to break when exposed, the end edges of the inner glass plate 200 are all set not to exceed the end edges of the outer glass plate 100 after lamination.

[0075] When the laminated structure of the outer glass plate 100, the intermediate layer 300, and the inner glass plate 200 enters the roller lamination equipment, due to the above reasons, the rollers 21 and 22 will first contact the outer glass plate 100, and then contact the step formed by the inner glass plate 200 and the intermediate layer 300, at this time, the roller pressure will extrude the inner glass plate 200 at the step and push the inner glass plate 200 in the opposite direction of the glass flow direction, causing displacement (hereinafter referred to as step effect), and further causing the appearance of a large and uncontrollable large difference B1; even if the laminated structure is subjected to point pre-bonding treatment, displacement phenomenon is still easy to appear after roller pressing.

[0076] Figure 6 The figure is a schematic diagram of the roller lamination flow direction of the laminated glass of one embodiment of the present application, at this time the laminated glass is provided with an auxiliary sheet layer 500, and the laminated glass enters the roller pressing gap formed by the rollers 21 and 22 for roller lamination from the end far from the auxiliary sheet layer as the head.

[0077] As Figure 9 shown, the lamination method of the laminated glass of the present application can prevent the further expansion of displacement after roller lamination by blocking the flow of the inner glass plate 200 in the opposite direction of the glass transmission direction by the auxiliary sheet layer 500 when the same laminated structure of the outer glass plate 100-intermediate layer 300-inner glass plate 200 enters the roller lamination equipment, thereby enabling the difference to be controlled and within a smaller range B2, and Figure 8 Compared with the disclosed technical solutions, the lamination method of the laminated glass of the present application can allow the designer to pre-design the difference range of the edge of the laminated glass, and obtain a laminated glass with an ideal difference size, thereby avoiding the problem of uncontrollable appearance of the laminated glass caused by the roller lamination process.

[0078] Figure 7 The figure is a schematic diagram of the roller lamination flow direction of the laminated glass of another embodiment of the present application, at this time the laminated glass is provided with an auxiliary sheet layer 500, and the laminated glass enters the roller pressing gap formed by the rollers 21 and 22 for roller lamination from the end close to the auxiliary sheet layer 500 as the head.

[0079] AsFigure 10 As shown, the lamination method of the laminated glass of the present application is provided with the auxiliary sheet 500, when the same laminated structure of the outer glass sheet 100-intermediate layer 300- inner glass sheet 200 enters the roller lamination equipment, the auxiliary sheet 500 and the outer glass sheet 100 are first contacted by the rollers 21, 22 respectively, so that the extrusion force applied to the rollers 21, 22 is applied to the auxiliary sheet 500, and the auxiliary sheet 500 flows in the reverse direction of the glass transmission direction during the roller lamination, and as the laminated glass flows in the roller gap formed by the rollers 21, 22, the contact object of the rollers 21, 22 is transferred from the auxiliary sheet 500 to the inner glass sheet 200, and due to the auxiliary sheet 500, the rollers 21, 22 cannot exert the step effect on the end edge of the inner glass sheet 100 during the transition, so that the inner glass sheet 100 after roller lamination does not produce displacement in the forward and reverse directions of the glass flow, and the same Figure 8 And Figure 9 Compared with the disclosed technical scheme, the embodiment can eliminate the influence of the step effect on the edge of the laminated glass, avoid the problem that the appearance of the laminated glass cannot be controlled due to the roller lamination process, and has better appearance and easier to control the difference.

[0080] More preferably, in one embodiment, the thickness of the auxiliary sheet 500 is set to be slightly larger than the thickness of the inner glass sheet 200, so that the rollers 21, 22 can more easily transition from the auxiliary sheet 500 to the inner glass sheet 200 without producing the step effect, in one embodiment, the thickness of the auxiliary sheet is the same as that of the inner glass sheet, and in one or more embodiments, the thickness of the auxiliary sheet can be 0-0.1mm thicker than the inner glass sheet, or 0-0.07mm thicker, or 0-0.05mm thicker, or 0-0.03mm thicker, or 0-0.02mm thicker.

[0081] As can be easily understood, the thickness of the auxiliary sheet should not be too much larger than the inner glass sheet 100, otherwise the extrusion force of the rollers 21, 22 on the outer glass sheet 100-intermediate layer 300-inner glass sheet 200 will be insufficient, resulting in lamination defects.

[0082] On this basis, as can be easily understood, the first form can refer to the form of the laminated glass before entering the roller lamination equipment.

[0083] In one or more embodiments, an adjustment distance D is formed between the auxiliary sheet 500 and the second glass sheet, and the adjustment distance D is 1-6mm. Specifically, the adjustment distance should be as small as possible, and can be controlled according to the design of the laminated glass.

[0084] In one or more embodiments, the auxiliary sheet layer 500 has a temperature resistance of ≥ 150℃ to meet the temperature rise requirement in the production process (e.g. the internal environment requirement of an autoclave), and preferably, the material of the auxiliary sheet layer 500 is selected from one or more of glass, ceramic, polyphenylene sulfide, polyimide, and polyarylate.

[0085] In one or more embodiments, the auxiliary sheet layer 500 has an overhanging portion beyond the end edge of the first glass sheet, and the overhanging portion has a width of 20-100 mm to facilitate removal of the auxiliary sheet layer 500, and the curvature of both the auxiliary sheet layer 500 and the indented area S1 are consistent to meet the lamination requirement.

[0086] It is easily understood that the adhesion between the auxiliary sheet layer 500 and the protective layer 400 should be less than the adhesion between the protective layer 400 and the intermediate layer 300 to facilitate easy removal of the auxiliary sheet layer 500.

[0087] The above description is merely preferred embodiments of the present application but not for limiting the present application. Modifications and variations of the present application, which are obvious to those skilled in the art, are intended to be within the scope of the present application. Any modifications, equivalent replacements, improvements, and the like made without departing from the spirit and principles of the present application shall be included in the scope of the present application.

Claims

1. A laminated glass, produced by assembling at least a first glass plate, a second glass plate, and an intermediate layer, characterized in that, The first glass plate has a first surface and a second surface disposed opposite to each other; the second glass plate has a third surface and a fourth surface disposed opposite to each other, wherein the second surface and the third surface are disposed opposite to each other, and the second glass plate is recessed inward at least a portion of its end edge relative to the first glass plate to form a recessed region S1 on the second surface; the intermediate layer is disposed between the first glass plate and the second glass plate, and has an extension portion that extends and covers at least a portion of the recessed region S1; the laminated glass further includes a protective layer configured to cover the extension portion; the laminated glass has a first form existing before assembly, and the laminated glass in the first form also has an auxiliary sheet detachably connected to the protective layer.

2. The laminated glass according to claim 1, characterized in that, The thickness of the first glass plate is 1.6 to 5.0 mm; the thickness of the second glass plate is 0.5 to 1.2 mm.

3. The laminated glass according to claim 1, characterized in that, The area of ​​the second glass plate is no more than 95% of that of the first glass plate.

4. The laminated glass according to claim 1, characterized in that, The recessed area S1 has mounting holes, while the second glass plate has no holes.

5. A laminated glass according to claim 1, characterized in that, The area of ​​the intermediate layer is the same as the area of ​​the first glass plate.

6. A laminated glass according to claim 1, characterized in that, The first glass plate is heat-strengthened glass, and the second glass plate is chemically strengthened glass.

7. A laminated glass according to claim 1, characterized in that, The protective layer is made of one or more of PET, PE, PS, and PVC.

8. A laminated glass according to claim 1, characterized in that, The thickness of the protective layer is ≤0.1mm.

9. A laminated glass according to claim 1, characterized in that, The first glass plate has an overlap between its end edge in the region other than the recessed region S1 and the end edge of the second glass plate, the overlap ranging from 0 to 2.5 mm.

10. A laminated glass according to claim 1, characterized in that, An adjustment gap is formed between the auxiliary sheet and the second glass plate, the adjustment gap being 1 to 6 mm, and the thickness of the auxiliary sheet being 0 to 0.1 mm thicker than the second glass plate.

11. A laminated glass according to claim 1, characterized in that, The auxiliary sheet has a temperature resistance of ≥150℃, and the material of the auxiliary sheet is selected from one or more of glass, ceramic, polyphenylene sulfide, polyimide, and polyarylate.

12. A laminated glass according to claim 1, characterized in that, The auxiliary sheet has an overhang that extends beyond the edge of the first glass plate. The width of the overhang is 20-100 mm, and the curvature of the auxiliary sheet and the recessed region S1 are the same.

13. A method for laminating laminated glass sheets, characterized in that, Including the following steps: A first curved glass plate and a second curved glass plate are obtained through a pretreatment process, wherein the first curved glass plate and the second curved glass plate have different thicknesses; A first curved glass plate, an intermediate layer, and a second curved glass plate are stacked sequentially. The stacked second curved glass plate is recessed inward at least a portion of its end edge relative to the first curved glass plate to form a recessed region S1. The auxiliary sheets covered with protective layers are stacked into the recessed area S1 to form a laminated glass semi-finished product; After the laminated glass semi-finished products are heated and pre-bonded, they are put into the roll forming and bonding equipment for lamination. After the lamination process is completed, the auxiliary film layer and the protective layer are separated.

14. A method for laminating laminated glass according to claim 13, characterized in that, The pretreatment process includes: cutting, edge grinding, forming, and strengthening.

15. A method for laminating laminated glass according to claim 13, characterized in that, The lamination process in the roll forming equipment includes the following steps: the laminated glass semi-finished product is entered into the roll forming gap between the rollers from the end furthest from the auxiliary sheet for roll forming, or the laminated glass semi-finished product is entered into the roll forming gap between the rollers from the end closest to the auxiliary sheet for roll forming.

16. A method for laminating laminated glass according to claim 13, characterized in that, The lamination process includes the steps of rolling the semi-finished laminated glass through a roll forming equipment and then subjecting it to high-pressure treatment in an autoclave.

17. A method for laminating laminated glass according to claim 13, characterized in that, In the laminated glass semi-finished product, an adjustment gap is formed between the auxiliary sheet and the second curved glass plate, the adjustment gap being 1 to 6 mm, and the thickness of the auxiliary sheet being 0 to 0.1 mm thicker than the second curved glass plate.

18. A method for laminating laminated glass according to claim 13, characterized in that, At least two bonding points are formed between the auxiliary sheet and the first curved glass plate, and at least two bonding points are formed between the first curved glass plate and the second curved glass plate.

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