Laminated glass and rigid membrane rolling and laminating method thereof

Abstract

The invention discloses a rigid membrane rolling and laminating method for laminated glass, the laminated glass comprises an outer glass plate, a rigid membrane and an inner glass plate which are laminated in sequence, and the method comprises the following steps: S1, after cutting the rigid membrane into a die, standing for a preset time; s2, sequentially laminating the outer glass plate, the rigid membrane and the inner glass plate, and cutting the redundant part of the rigid membrane to obtain to-be-processed glass; s3, heating, conveying and rolling the to-be-processed glass for at least two times, controlling the primary conveying speed and the secondary conveying speed to be less than or equal to 10mm / s, controlling the primary tapping temperature and the secondary tapping temperature to be 40-100 DEG C, controlling the secondary conveying speed to be greater than the primary conveying speed, and controlling the secondary tapping temperature to be greater than the primary tapping temperature; and S4, performing high-temperature and high-pressure treatment to obtain the finished laminated glass. Correspondingly, the invention also discloses the laminated glass prepared on the basis of the method, and the laminated glass has relatively high rigidity and excellent sound insulation and light weight.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass production, and particularly relates to a laminated glass and a rigid diaphragm roll pressing piece method. BACKGROUND

[0002] In recent years, with the development of the automobile industry, consumers' requirements for the appearance and performance of vehicles have increased, and frameless doors have become a design trend due to their fashion and dynamicity, especially in new energy vehicles.

[0003] However, for frameless doors, due to the lack of a frame to limit them, compared with framed doors, frameless door glass is more prone to vibration during lifting or door opening and closing, and after the door is closed, the door glass is prone to difficult embedding into the sealing groove due to insufficient stiffness. Therefore, frameless doors have higher overall rigidity requirements for glass, and the use of conventional intermediate diaphragms cannot meet the rigidity requirements of frameless doors for glass. In order to improve the rigidity of the glass, some OEMs increase the thickness of the glass to improve the rigidity, but this increases the overall weight of the vehicle.

[0004] The rigid diaphragm can theoretically improve the rigidity of the laminated glass, but the traditional roll pressing piece technology is not suitable for such rigid diaphragms, so how to use the rigid diaphragm to obtain laminated glass with high rigidity has become a problem to be solved. SUMMARY

[0005] The technical problem solved by the present application is that the present application discloses a laminated glass and a rigid diaphragm roll pressing piece method to solve the problem of how to use a rigid diaphragm to obtain laminated glass with high rigidity.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a rigid diaphragm roll pressing piece method for laminated glass, the laminated glass comprising an outer glass plate, a rigid diaphragm and an inner glass plate stacked in sequence, comprising the steps of: S1: cutting the rigid diaphragm and resting for a predetermined time; S2: sequentially stacking the outer glass plate, the rigid diaphragm and the inner glass plate, and trimming the excess part of the rigid diaphragm to obtain a glass to be processed; S3: heating and transporting the glass to be processed at least twice and roll pressing, and controlling the first transmission speed, the second transmission speed <= 10 mm / s, the first furnace temperature, the second furnace temperature 40~100℃, and controlling the second transmission speed greater than the first transmission speed, and the second furnace temperature greater than the first furnace temperature; S4: high temperature and high pressure treatment to obtain finished laminated glass.

[0007] In the technical scheme of the present application, a new rigid film roll pressing method for laminated glass is designed to produce laminated glass by using the rigid film roll pressing method. Specifically, the rigid film is placed for a preset time after cutting the mold to ensure that the rigid film is naturally placed flat, thereby reducing the possibility of subsequent rigid film curling problems. At the same time, the two heating transmission and roll pressing effectively improve the exhaust effect of the rigid film, avoiding the uncontrolled problem of the rigid film and the glass as the outer glass plate and the inner glass plate during the roll pressing. After heating and roll pressing, high temperature and high pressure treatment is carried out by adjusting the autoclave to optimize the glass bonding performance of the final rigid film and the outer glass plate and the inner glass plate, ensuring that the laminated glass produced by the rigid film roll pressing method has excellent lightweight performance and sound insulation performance, and also has good rigidity, which has good popularization prospect and application value.

[0008] Further, in the rigid film roll pressing method of the present application, in step S1, the preset time is 24-48h, and the outer glass plate and the inner glass plate are bent and formed at a high temperature of at least 650℃.

[0009] Further, in the rigid film roll pressing method of the present application, in step S2, after cutting the excess part of the rigid film, the size allowance of the rigid film extending outside the outer glass plate is 1-3mm.

[0010] In the above technical scheme of the present application, the excess part of the rigid film specifically refers to the part left after cutting the rigid film according to the glass outer contour of the outer glass plate and the inner glass plate. The size allowance of the rigid film extending outside the outer glass plate specifically refers to the distance of the rigid film extending compared to the whole circumference of the glass of the outer glass plate, and the size allowance at each place can not be equal, which can be controlled between 1-3mm.

[0011] Further, in the rigid film roll pressing method of the present application, in step S3, the glass to be processed is heated and transmitted twice and roll pressed, specifically: The glass to be processed is heated and transmitted once and roll pressed, the first transmission speed and the second transmission speed are controlled to be 4-10mm / s, the first furnace temperature and the second furnace temperature are controlled to be 40-100℃, and the first roller speed and the second roller speed are controlled to be 100-170mm / s, wherein the second transmission speed is greater than the first transmission speed, the second furnace temperature is greater than the first furnace temperature, and the second roller speed is greater than the first roller speed.

[0012] In the technical scheme of the present application, in some specific embodiments, the glass to be processed can be heated and transported twice and rolled, that is, the glass to be processed can be transported once to the heating furnace for heating, and then transported out of the heating furnace and into the roller press for rolling by the rollers in the roller press; correspondingly, in order to ensure the effect, after the first rolling, the glass can be further transported twice into the heating furnace for heating, and then transported out of the heating furnace and into the roller press for rolling by the rollers in the roller press.

[0013] It should be noted that the process parameters of the first heating and transportation rolling and the second heating and transportation rolling are set to ensure that the transparency of the product obtained by the final rolling is optimal; when the glass to be processed is rolled in the roller press, the speed during rolling and the roller speed are basically consistent.

[0014] Further, in the rigid membrane sheet rolling and splicing method of the present application, in step S3, the first furnace-out temperature is 45-55℃, and the second furnace-out temperature is 80-90℃.

[0015] In the technical scheme of the present application, the first furnace-out temperature is preferably controlled to be 45-55℃, which can effectively optimize the exhaust effect of the rigid membrane sheet; the furnace-out temperature is preferably controlled to be 80-90℃, which can effectively optimize the edge sealing effect of the rigid membrane sheet.

[0016] Further, in the rigid membrane sheet rolling and splicing method of the present application, in step S3, after the first heating and transportation rolling, the glass to be processed is continuously heated and transported, and the second heating and transportation rolling is started; during the second heating and transportation rolling, according to the relative position of the glass to be processed and the rollers, the glass to be processed is pushed to a horizontal state when it is transported to the roller press, so that the glass to be processed is in contact with the rollers at the meshing position and edge sealing is performed.

[0017] Further, in the rigid membrane sheet rolling and splicing method of the present application, between steps S3 and S4, when the glass to be processed is transported to the next splicing position after the second heating and transportation rolling, the transparency of the glass to be processed is checked, and the outer glass plate, the rigid membrane sheet and the inner glass plate of the glass to be processed are kept relatively fixed.

[0018] Further, in the rigid membrane sheet rolling and splicing method of the present application, in step S4, the high-temperature and high-pressure treatment specifically includes the following treatment; high-pressure temperature: 80-145℃, pressure: 0-11.5Bar, high-pressure time: 125-135min.

[0019] Correspondingly, the application further discloses a laminated glass prepared by the rigid film roll pressing method, which comprises an outer glass plate, a rigid film and an inner glass plate which are sequentially stacked and heated and transmitted for at least twice and roll pressed.

[0020] Further, in the laminated glass, the thickness of the outer glass plate is 1.6-5.0 mm, the thickness of the rigid film is 0.3-2.3 mm, and the thickness of the inner glass plate is 0.7-5.0 mm; wherein the thickness of the outer glass plate is greater than the thickness of the inner glass plate.

[0021] Further, in the laminated glass, the surface stress of the outer glass plate ranges from 10 to 150 Mpa, and the surface stress of the inner glass plate ranges from 300 to 1000 Mpa.

[0022] In the technical scheme, the outer glass plate can be a glass after physical heat strengthening, physical semi-tempering or physical tempering treatment, which specifically refers to heating the outer glass plate to a certain temperature between the annealing upper limit temperature and the softening point, and then cooling the surface of the outer glass plate to below the annealing temperature by using a corresponding cooling means. In this process, the surface layer of the outer glass plate is cooled quickly and solidified rapidly, the core layer continues to cool, the surface layer is subjected to shrinkage stress, and surface compressive stress is generated, and the corresponding core layer generates central tensile stress, thereby improving the strength of the outer glass plate.

[0023] The inner glass plate can be a glass after chemical tempering treatment, which refers to preheating the inner glass plate to a temperature close to the chemical tempering temperature, and then putting it into a molten potassium nitrate with a preset tempering temperature and continuously ion exchanging for a period of time. The large radius K+ in the salt bath exchanges the small radius Na+ in the glass to form a squeezing effect, and a micron-level stress layer depth and hundreds of megapascals of compressive stress are generated on the surface of the inner glass plate, so that the inner glass plate is chemically tempered, thereby improving the strength of the inner glass plate.

[0024] Further, in the laminated glass, the minimum stiffness value of the laminated glass is ≥3.9, and the average stiffness value of the laminated glass is 4-6 (≥4 and ≤6).

[0025] Further, in the laminated glass, the Young's modulus E of the rigid film is 100 MPa≤E≤280 MPa, and the hysteresis is ≤0.1% FS (Full Scale, full scale).

[0026] Further, in the laminated glass, the rigid film is a single-layer or multi-layer film structure; wherein when the rigid film is a multi-layer film structure, it at least includes a sound insulation layer and / or a heat insulation layer.

[0027] In the above technical solution of the present application, the sound insulation layer applied in the rigid film sheet can be a film sheet containing high plasticizer, and the heat insulation layer can be a film sheet containing infrared absorber or infrared reflection coating, which can be selected according to specific application requirements.

[0028] The present application has the beneficial effect that the rigid film sheet roll pressing method for laminated glass designed in the present application optimizes the process itself, specifically by setting a pre-determined resting time for the rigid film sheet after cutting the mold, so that the rigid film sheet is naturally placed flat and the subsequent possible curling problem of the rigid film sheet is reduced. At the same time, in the rigid film sheet roll pressing method, the two heating transmission and roll pressing effectively improve the exhaust effect of the rigid film sheet and avoid the problem of uncontrolled stacking difference when the rigid film sheet is roll pressed. After heating and roll pressing, high temperature and high pressure treatment is carried out by adjusting the autoclave to optimize the bonding performance of the final rigid film sheet and glass.

[0029] Therefore, based on the process optimization and improvement of the above-mentioned rigid film sheet roll pressing method, the laminated glass finally prepared by using the rigid film sheet roll pressing method not only has excellent sound insulation performance and lightweight performance, but also has good rigidity, which can effectively solve the problem of rigidity, sound insulation and lightweight that cannot be considered simultaneously in the existing frameless car door glass, and has good popularization prospect and application value. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Step flow chart of the rigid film sheet roll pressing method in one embodiment of the present application; Figure 2 Structure cross-sectional view of the laminated glass prepared based on the rigid film sheet roll pressing method in one embodiment of the present application; Figure 3 Structure schematic view of the pre-roll pressing transmission equipment used based on the rigid film sheet roll pressing method of the present application; Figure 4 The experimental comparison table of the laminated glass prepared by using the rigid film sheet roll pressing method of the present application and the existing laminated glass without rigid film sheet for rigidity comparison is shown schematically.

[0031] Label explanation: 1, outer glass plate; 11, first surface; 12, second surface; 2, rigid film sheet; 3, inner glass plate; 31, third surface; 32, fourth surface; 4, pre-roll pressing transmission equipment; 41, roll pressing misalignment stop block; 42, transmission belt; 43, infrared detection head. Detailed Implementation

[0032] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0033] like Figure 1 As shown, and in conjunction with references Figure 2 and Figure 3 The laminated glass in Examples 1-6 of this invention is produced using the following rigid diaphragm roll pressing method: (1) Select an outer glass plate 1, an inner glass plate 3 and a rigid diaphragm 2, and let the rigid diaphragm 2 stand for a preset time after cutting and molding, the preset time being 24~48h, in order to reduce the curling of the rigid diaphragm; at the same time, the outer glass plate 1 and the inner glass plate 3, which have been bent and formed at a high temperature of at least 650℃, are washed and dried by a washing machine to remove impurities, and then the outer glass plate 1, the inner glass plate 3 and the rigid diaphragm 2 are conveyed together to the lamination chamber, wherein cutting and molding refers to cutting the rigid diaphragm 2 to be approximately equal to the outer contour shape and size of the outer glass plate 1 and the inner glass plate 3; (2) In the above-mentioned lamination chamber, the outer glass plate 1 is placed on the stacking fixture, and the rigid film 2 and the inner glass plate 3 are laid in sequence. Then, the excess part of the rigid film 2 is cut off. During the cutting, the dimensional allowance of the rigid film 2 extending beyond the outer side of the outer glass plate 1 is controlled to be 1~3mm. Then, the inner glass plate 3 is locally heated to make the rigid film 2 form a basic bonding force and finally obtain the glass to be processed. The final glass to be processed has an exposed edge and can reduce the stacking difference after rolling. The excess part of the rigid film 2 refers to the part of the rigid film 2 that is cut according to the outer glass contour of the outer glass plate 1 and the inner glass plate 3. The dimensional allowance of the rigid film 2 extending beyond the outer side of the outer glass plate 1 specifically refers to the distance that the rigid film 2 extends relative to the entire circumference of the outer glass plate 1. The dimensional allowance at each place can be different, 1~3mm is sufficient. (3) The glass to be processed is subjected to two heating and conveying processes and rolled, and the first conveying speed and the second conveying speed are controlled to be 4~10 mm / s, the first exit temperature and the second exit temperature are controlled to be 40~100℃, and the first roller speed and the second roller speed are controlled to be 100~170 mm / s, and the second conveying speed is controlled to be greater than the first conveying speed, the second exit temperature is greater than the first exit temperature, and the second roller speed is greater than the first roller speed; preferably, the glass to be processed is subjected to one heating and conveying process and rolled, and the first conveying speed is controlled to be 4.5~5.5 mm / s, the first exit temperature is controlled to be 40~60℃, and the first roller speed is controlled to be 108~132 mm / s to achieve rigid diaphragm exhaust; then it is subjected to a second heating and conveying process and rolled, and the second conveying speed is controlled to be 5.2~6.4 mm / s, the second exit temperature is controlled to be 75~95℃, and the second roller speed is controlled to be 135~165 mm / s; (4) Lift up the rolled glass and check its transparency, and install elastic clips around the glass to fix the rigid diaphragm 2 that holds the outer glass plate 1 and the inner glass plate 3. (5) The glass is placed in an autoclave for high-temperature and high-pressure treatment to dissolve the rigid diaphragm 2 under prolonged high-temperature and high-pressure conditions, and to stably bond it with the outer glass plate 1 and the inner glass plate 3, thereby obtaining the finished laminated glass; wherein the high-temperature and high-pressure treatment specifically includes the following treatments: high-pressure temperature: 80~145℃, pressure: 0~11.5 Bar, high-pressure time: 125~135 min. It should be noted that, see Figure 3 When performing step S3 above, before the glass to be processed is heated and rolled once or heated and rolled twice, the glass to be processed can be conveyed by a pre-rolling conveyor 4 containing a roll-rolling misalignment block 41, a conveyor belt 42 and an infrared detector 43. When the glass to be processed is conveyed by the conveyor belt 42 of the pre-rolling conveyor 4, it can be detected in advance by the infrared detector 43. Then, the roll-rolling misalignment block 41 is controlled to rise and push the glass to be processed to a horizontal position to ensure that the exposed edge of the glass to be processed is flush with the roller, to ensure the rolling effect, and to facilitate the contact between the glass to be processed and the roller for edge sealing. Of course, in practical applications, the conveyor belt of the pre-rolling conveyor is driven by a motor and works in coordination with the infrared detector 43. The roll pressing misalignment block 41 can be specifically set in multiple ways, such as two or more, to push the glass to be processed to a horizontal position, ensure the horizontal positioning accuracy of the glass to be processed in the horizontal direction, and improve the subsequent roll pressing effect. See Figure 2As shown, in the laminated glass of embodiments 1-6 above, the outer glass plate 1 of the laminated glass of embodiments 1-6 has a first surface 11 away from the rigid diaphragm and a second surface 12 close to the rigid module. In practical applications, the laminated glass can be applied to vehicles, and the first surface 11 is disposed facing the outside of the vehicle, and the second surface is disposed facing the inside of the vehicle. The thickness of the outer glass plate 1 is specifically 1.6~5.0mm, for example 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc., preferably 3.2mm, 3.5mm, 4.0mm, 4.5mm or 5.0mm, and more preferably 3.5mm.

[0034] It should be noted that the outer glass plate 1 of the laminated glass in Examples 1-6 can be ordinary green glass with a visible light transmittance of 73%~88%, or solar green glass with a visible light transmittance of 70%~85.5%, which can be used as vehicle front door glass. Alternatively, the outer glass plate 1 of the laminated glass in Examples 1-6 can be ordinary green glass with a visible light transmittance of 73%~88%, solar green glass with a visible light transmittance of 70%~85.5%, or light gray or dark green glass with a visible light transmittance of 25%~50%, which can be specifically used as vehicle rear door glass. To ensure the quality and effect of the outer glass plate 1 in actual application, the surface stress range of the selected outer glass plate can specifically be 10~150 MPa.

[0035] Accordingly, in the laminated glass of Embodiments 1-6, the inner glass plate 3 of the laminated glass of Embodiments 1-6 has a third surface 31 near the rigid diaphragm and a fourth surface 32 away from the rigid module. The third surface 31 is specifically disposed facing the outside of the vehicle, and the fourth surface 32 is specifically disposed facing the inside of the vehicle. The thickness of the inner glass plate 3 can be 0.7~5.0mm, and preferably 0.7~2.6mm, such as 0.7mm, 1.1mm, 1.6mm, 1.8mm, 2.1mm, 2.6mm, etc., and more preferably 1.1mm.

[0036] It should be noted that the inner glass plate 3 of the laminated glass in Examples 1-6 can be transparent glass with a visible light transmittance of 85%~93%, ordinary green glass with a visible light transmittance of 73%~88%, solar green glass with a visible light transmittance of 70%~85.5%, light gray or dark green glass with a visible light transmittance of 25%~50%, or dark gray or darker green glass with a visible light transmittance of <25%. Specifically, to ensure the quality and effect of the inner glass plate 3 in practical applications, the surface stress range of the selected outer glass plate can be 300~1000 MPa.

[0037] See Figure 2 As shown, in the laminated glass of Examples 1-6 prepared by the present invention, the rigid diaphragm 2 of the laminated glass needs to be mounted on the second surface 12 of the outer glass plate 1 and the third surface 31 of the inner glass plate 3, and the outer glass plate 1 is larger than the inner glass plate 3. The rigid diaphragm 2 is used to bond the second surface 12 and the third surface 31. The rigid diaphragm 2 can be a single-layer or multi-layer diaphragm structure, and the thickness of the rigid diaphragm 2 is usually 0.3~2.3mm, for example: 0.38mm, 0.51mm, 0.76mm, 1.9mm, 1.52mm, etc., preferably 0.38mm, 0.76mm, and more preferably 0.76mm.

[0038] When the rigid diaphragm 2 has a multilayer diaphragm structure, it includes at least one sound insulation layer and / or heat insulation layer to obtain other functions, such as adding an infrared absorber to at least one diaphragm layer to obtain sun protection or heat insulation functions. The rigid diaphragm 2 may also contain at least two layers, one of which has a higher plasticizer content to obtain sound insulation function.

[0039] In practical applications, the rigid diaphragm 2 can be a transparent PVB with a visible light transmittance of >70%. The rigid diaphragm 2 is a polymer material formed by plasticizing polyvinyl butyral (PVB) resin with a plasticizer, which significantly improves mechanical stiffness and structural support.

[0040] Based on this, the rigid diaphragm 2 used in the laminated glass of Examples 1-6 differs from ordinary diaphragms mainly in the following ways: 1. Better material stiffness: The Young's modulus of the rigid diaphragm is 100MPa≤E≤280MPa. The Young's modulus E of the prepared rigid diaphragm is 100MPa, 110MPa, 120MPa, 150MPa, 180MPa, 200MPa, 250MPa, 260MPa, 270MPa, 280MPa, or any two of these values, while the Young's modulus E of ordinary diaphragms is <5MPa. 2. Smaller hysteresis: The hysteresis of the rigid diaphragm is ≤0.1% FS (Full Scale), and its creep is negligible, while the hysteresis phenomenon of ordinary diaphragms is obvious, with a hysteresis of 1~5%FS. 3. Poorer temperature sensitivity: The coefficient of thermal expansion of the rigid diaphragm is low, while the coefficient of thermal expansion of ordinary diaphragms is high.

[0041] Correspondingly, it is precisely because of the addition of the aforementioned rigid diaphragm that the laminated glass of Examples 1-6 can obtain better stiffness, with a minimum stiffness value of ≥3.9 and an average stiffness value of 4~6 (≥4 and ≤6); preferably, the average stiffness value of the laminated glass can be further limited to between 4 and 5 (≥4 and ≤5).

[0042] It should be noted that the hysteresis phenomenon that occurs when using ordinary diaphragms in laminated glass production is essentially due to the asynchronous deformation and stress of the diaphragm under external force. After these external forces are removed from the diaphragm, it cannot immediately return to its original hysteresis effect. The hysteresis of ordinary diaphragms is 1~5%FS, meaning that the degree of hysteresis is quantified as a percentage of the set full scale. The hysteresis range is between 1% and 5% of the full scale reference. FS is an abbreviation for "Full Scale".

[0043] Based on this, the rigid diaphragms in the laminated glass of Examples 1-6 prepared by the rigid diaphragm roll pressing method of the present invention have excellent rigidity, heat preservation and sound insulation performance, and will not have defects such as poor bonding and uncontrolled stacking difference during the preparation process.

[0044] Accordingly, in order to further verify that the laminated glass of Examples 1-6 has good rigidity, a comparative test was also conducted on the laminated glass of Examples 1-6 and the existing laminated glass without rigid film. The specific comparative test was as follows: a total of 5 groups of glass experiments were set up, namely experimental groups A, B, C, D and E. The relevant product parameters of each group are shown in Table 3. Group A consists of rigid films prepared using the present invention, i.e., second laminated glass, which are loaded with rigid films; Groups B, C, D and E consist of existing laminated glass without rigid films, which are classified as first laminated glass, and specifically use ordinary PVB films.

[0045] Six pieces of glass were randomly selected from each group as six examples or comparative examples of each group, namely the second laminated glass of Examples 1-6 shown in Group A and the first laminated glass of Comparative Examples 1-6 in Group B, Comparative Examples 7-11 in Group C, Comparative Examples 12-18 in Group D and Comparative Examples 19-24 in Group E, for comparison and verification. The stiffness of the glass is tested at the same location using a stiffness testing machine. The specific stiffness testing method is as follows: First, place the first or second laminated glass into the stiffness testing machine and clamp the fixed edge of the glass. Then, adjust the position of the probe of the stiffness testing machine to the measurement point (77, 50) (measured at the intersection of the corners of the door glass, 77mm horizontally and 50mm vertically). After adjustment, set the probe stroke to 12mm and start the stiffness testing machine. The stiffness testing machine drives the probe to the set stroke of 12mm and reads the stiffness measurement value on the display screen. Then, control the probe to slowly move away from the first or second laminated glass, release the lower clamp, and remove the glass.

[0046] To ensure data accuracy, each piece of glass was measured three times, and the average of the three measurements was taken. The relevant comparison results can be found in [link to relevant comparison results].Figure 4 .

[0047] like Figure 4 As shown, the average stiffness of the second laminated glass in Group A (Examples 1-6) prepared using the present invention is 4.24~4.53 N / mm. Compared with the first laminated glass in Group B, the stiffness of the second laminated glass in Group A is increased by 69.6%~62.3%; compared with the first laminated glass in Group C, the stiffness of the second laminated glass in Group A is increased by 38.1%~49.04%; compared with the first laminated glass in Group D, the stiffness of the second laminated glass in Group A is increased by 59.0%~62.9%; and compared with the first laminated glass in Group E, the stiffness of the second laminated glass in Group A is increased by 29.6%~16.7%. It can be seen that the rigid diaphragm 2 significantly improves the overall stiffness of the glass compared with the ordinary PVB diaphragm, by more than 20%. The laminated glass prepared using the rigid diaphragm roll-pressing method designed in this invention all have excellent stiffness performance.

[0048] In summary, the rigid diaphragm roll forming method designed in this invention can effectively solve the problems of rigidity, sound insulation, and lightweight that existing frameless car door glass cannot simultaneously achieve. The laminated glass finally produced by this rigid diaphragm roll forming method has excellent sound insulation and lightweight performance, as well as good rigidity, and has good prospects for promotion and application value.

[0049] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for rolling together a rigid diaphragm in laminated glass, the laminated glass comprising an outer glass plate, a rigid diaphragm, and an inner glass plate stacked sequentially, characterized in that, Including the following steps: S1: After cutting the rigid diaphragm into a mold, let it stand for a preset time; S2: The outer glass plate, rigid diaphragm and inner glass plate are stacked in sequence, and the excess part of the rigid diaphragm is trimmed to obtain the glass to be processed; S3: The glass to be processed is heated and rolled at least twice, and the first and second conveying speeds are controlled to be ≤10mm / s, the first and second exit temperatures are controlled to be 40~100℃, and the second conveying speed is controlled to be greater than the first conveying speed, and the second exit temperature is greater than the first exit temperature. S4: High temperature and high pressure treatment is carried out to obtain finished laminated glass.

2. The rigid diaphragm roll pressing method according to claim 1, characterized in that, In step S1, the preset time is 24~48h, and the outer glass plate and the inner glass plate are bent and formed at a high temperature of at least 650℃.

3. The rigid diaphragm roll pressing method according to claim 1, characterized in that, In step S2, after trimming the excess portion of the rigid diaphragm, the dimensional allowance of the rigid diaphragm extending beyond the outer side of the outer glass plate is 1~3mm.

4. The rigid diaphragm roll pressing method according to claim 1, characterized in that, In step S3, the glass to be processed is subjected to two heating, conveying, and rolling processes, specifically: The glass to be processed is subjected to a first heating, conveying, and rolling process. The first and second conveying speeds are controlled at 4-10 mm / s, the first and second exit temperatures are controlled at 40-100℃, and the first and second roller speeds are controlled at 100-170 mm / s. The second conveying speed is greater than the first conveying speed, the second exit temperature is greater than the first exit temperature, and the second roller speed is greater than the first roller speed.

5. The rigid diaphragm roll pressing method according to claim 1, characterized in that, In step S3, the primary furnace exit temperature is 45~55℃, and the secondary furnace exit temperature is 80~90℃.

6. The rigid diaphragm roll pressing method according to claim 1, characterized in that, In step S3, after completing the first heating and rolling process, the glass to be processed is continuously heated and transported, and a second heating and rolling process is initiated. During the second heating and rolling process, based on the relative position of the glass to be processed and the rollers, the glass to be processed is pushed to a horizontal position when it is transported to the pre-rolling transport equipment, so that the glass to be processed contacts the meshing part of the rollers and is sealed.

7. The rigid diaphragm roll pressing method according to claim 1, characterized in that, Between steps S3 and S4, when the glass to be processed is transferred to the unloading station after secondary heating and rolling, the transparency of the glass to be processed is checked, and the outer glass plate, rigid film and inner glass plate of the glass to be processed are kept relatively fixed.

8. The rigid diaphragm roll pressing method according to claim 1, characterized in that, In step S4, the high-temperature and high-pressure treatment specifically includes the following treatment: high-pressure temperature: 80~145℃, pressure: 0~11.5Bar, high-pressure time: 125~135min.

9. A laminated glass, characterized in that, It includes an outer glass plate, a rigid diaphragm, and an inner glass plate stacked in sequence, and the outer glass plate, rigid diaphragm, and inner glass plate are heated and rolled at least twice.

10. The laminated glass according to claim 9, characterized in that, The outer glass plate has a thickness of 1.6~5.0mm, the rigid diaphragm has a thickness of 0.3~2.3mm, and the inner glass plate has a thickness of 0.7~5.0mm; wherein the thickness of the outer glass plate is greater than the thickness of the inner glass plate.

11. The laminated glass according to claim 9, characterized in that, The surface stress range of the outer glass plate is 10 to 150 MPa, and the surface stress range of the inner glass plate is 300 to 1000 MPa.

12. The laminated glass according to claim 9, characterized in that, The minimum stiffness value of the laminated glass is ≥3.9, and the average stiffness value of the laminated glass is 4~6.

13. The laminated glass according to claim 9, characterized in that, The rigid diaphragm has a Young's modulus E of 100MPa≤E≤280MPa and a hysteresis of ≤0.1%FS.

14. The laminated glass according to claim 9, characterized in that, The rigid diaphragm is a single-layer or multi-layer diaphragm structure; wherein, when the rigid diaphragm is a multi-layer diaphragm structure, it includes at least one sound insulation layer and / or heat insulation layer.

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