Laminated glass

Abstract

The present application relates to a kind of laminated glass, including at least two substrates, for connecting adjacent two substrates interlayer and overflow control member;Overflow control member is along the edge of interlayer, and overflow control member is connected with the substrate located at the two sides of interlayer respectively;Overflow control member is provided with air-permeable passage, air-permeable passage is communicated with interlayer and the outside of laminated glass.By setting overflow control member, when molten interlayer flows outward, physical barrier can be formed, effectively prevent glue liquid from overflowing from the edge of substrate, to avoid material waste, improve production efficiency;While the air-permeable passage provided on overflow control member provides a discharge path for the gas between the two substrates during high-pressure bonding process, so that the gas can escape in time to avoid bubble formation, ensure the quality of product, improve the overall strength and use safety of product.

Description

Technical Field

[0001] This invention relates to the field of glass technology, and in particular to a laminated glass. Background Technology

[0002] When laminated glass is laminated, the interlayer material is usually melted under high temperature in an autoclave so that the two substrates can be bonded together. At the same time, the internal high pressure removes the air inside the laminated glass and finally achieves lamination.

[0003] However, the molten intermediate layer has a certain degree of fluidity, which makes it easy for the molten intermediate layer to overflow from the edge of the substrate during the high-pressure degassing process. This leads to material waste and reduced production efficiency. Excessive overflow of intermediate layer material may result in insufficient filling between the two substrates, causing residual air bubbles in some areas. This can not only cause some product appearance defects and reduce product quality and reliability, but may even affect product strength and safety performance due to excessive loss of intermediate layer quality. Summary of the Invention

[0004] Therefore, it is necessary to provide a laminated glass that can effectively prevent adhesive from overflowing from the edges, thereby avoiding material waste, improving production efficiency, preventing bubble formation, ensuring product quality, and improving the overall strength and safety of the product.

[0005] A laminated glass includes at least two substrates, an intermediate layer for connecting two adjacent substrates, and an overflow control element.

[0006] The overflow control element is disposed along the edge of the intermediate layer, and the overflow control element is respectively connected to the substrate located on both sides of the intermediate layer;

[0007] The overflow control component is provided with a venting channel, which connects the intermediate layer and the outside of the laminated glass.

[0008] In one embodiment, the overflow control element is capable of elastic deformation.

[0009] In one embodiment, the overflow control element is at least partially sandwiched between the two substrates.

[0010] In one embodiment, the air-permeable channel is a microporous structure or a mesh structure.

[0011] In one embodiment, the material used for the overflow control element is selected from at least one of breathable silicone, breathable rubber, or breathable polyurethane.

[0012] In one embodiment, the laminated glass further includes a flow control element disposed between the interlayer and at least one of the substrates for controlling the flow of the interlayer in a molten state.

[0013] In one embodiment, the flow control element is layered and adheres to the surface of the intermediate layer.

[0014] In one embodiment, the flow control element has a microporous structure inside, which allows the molten intermediate layer to penetrate into the interior of the microporous structure.

[0015] In one embodiment, the material used for the flow control element is selected from at least one of PET film, glass fiber mat, or electrospun nanofiber film.

[0016] In one embodiment, the laminated glass further includes a flow control element, which is a rheological material layer whose flow resistance can be adjusted by an external electric field or an external magnetic field.

[0017] In one embodiment, the intermediate layer includes at least one adhesive layer comprising at least one of polyvinyl butyral (PVB), polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), thermoplastic polyurethane elastomer (TPU), polyurethane (PU), and ionic polymer (SGP).

[0018] In one embodiment, the intermediate layer further includes a functional layer, which is connected to the substrate via the adhesive layer. The functional layer includes at least one of a heat insulation functional layer, an ultraviolet blocking functional layer, a heating functional layer, a dimming functional layer, a reflective functional layer, and a display functional layer.

[0019] In the above solution, by setting an overflow control component, a physical barrier can be formed when the molten intermediate layer flows outward, effectively preventing the adhesive from overflowing from the edge of the substrate, thereby avoiding material waste and improving production efficiency; at the same time, the venting channel set on the overflow control component provides an exhaust path for the gas between the two substrates during the high-pressure lamination process, allowing the gas to escape in time to avoid the formation of bubbles, ensuring product quality, and improving the overall strength and safety of the product. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of laminated glass according to an embodiment of this application.

[0023] Figure 2 This is a top view of the laminated glass shown in one embodiment of this application.

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 This is a schematic diagram of the overflow control device according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Laminated glass; 100. Substrate; 200. Intermediate layer; 210. First adhesive layer; 220. Functional layer; 230. Second adhesive layer; 300. Flow control element; 400. Overflow control element; 410. Ventilation channel. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Please see Figure 1 , Figure 2 and Figure 3 This application relates to a laminated glass 10, comprising two substrates 100, an intermediate layer 200 located between the two substrates 100, and an overflow control member 400. The overflow control member 400 is disposed along the edge of the intermediate layer 200 and is connected to the substrates 100 located on both sides of the intermediate layer 200. The overflow control member 400 is provided with a venting channel, which connects the intermediate layer 200 and the outside of the laminated glass 10.

[0033] The substrate 100 may be made of materials including, but not limited to, glass, polyethylene terephthalate (PET), polyimide (PI), polyethylene naphthalate (PEN), and cyclic olefin polymers (COP). The glass may be soda-lime silicate glass or aluminosilicate glass. Exemplarily, in this embodiment, the substrate 100 is made of glass. The two substrates 100 have different dimensions.

[0034] Intermediate layer 200 includes at least one adhesive layer, which comprises at least one of polyvinyl butyral (PVB), polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), thermoplastic polyurethane elastomer (TPU), polyurethane (PU), and ionic polymer (SGP).

[0035] The intermediate layer 200 also includes a functional layer 200, which is connected to the substrate via an adhesive layer. Specifically, the intermediate layer 200 includes a first adhesive layer 210, a functional layer 220, and a second adhesive layer 230 stacked sequentially. The functional layer 200 is connected to the substrate 100 via the first adhesive layer 210 and the second adhesive layer 230, respectively.

[0036] The functional layer 200 includes at least one of the following: a heat-insulating functional layer, a UV-blocking functional layer, a heating functional layer, a dimming functional layer, a reflective functional layer, and a display functional layer. During the hot pressing process, the first adhesive layer 210 and the second adhesive layer 230 are heated and melted, bonding the functional layer 220 to the two substrates 100 as a single unit. It should be noted that the molten intermediate layer 200 is the adhesive solution generated by melting the first adhesive layer 210 and the second adhesive layer 230.

[0037] For example, the first adhesive layer 210 and the second adhesive layer 230 are PVB films. The functional film is a heat-insulating functional layer, and its two sides are bonded to the two substrates 100 respectively through the first adhesive layer 210 and the second adhesive layer 230.

[0038] By setting the overflow control component 400, a physical barrier can be formed when the molten intermediate layer 200 flows outward, effectively preventing the adhesive from overflowing from the edge of the substrate 100, thereby avoiding material waste and improving production efficiency; at the same time, the venting channel 410 set on the overflow control component 400 provides an exhaust path for the gas between the two substrates 100 during the high-pressure lamination process, so that the gas can escape in time to avoid the formation of bubbles, ensuring product quality and improving the overall strength and safety of the product.

[0039] Please see Figure 1 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the overflow control member 400 is capable of elastic deformation. The elastic deformation capability allows the overflow control member 400 to be compressed in the thickness direction and generate a reverse elastic force when sandwiched between two substrates 100, thereby tightly adhering to the edge of the intermediate layer 200 and the inner surface of the two side substrates 100, forming a reliable sealing barrier to prevent molten adhesive from overflowing from the edge.

[0040] Please see Figure 1 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the overflow control element 400 is at least partially sandwiched between the two substrates 100. In one embodiment, a portion of the overflow control element 400 is located in the gap between the two substrates 100, and another portion may extend to the outer edge of the laminated glass 10. The portion sandwiched between the two substrates 100 undergoes elastic deformation under the pressure of the substrates 100, further enhancing the sealing effect on the interlayer 200.

[0041] Please see Figure 1 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, such as Figure 3 As shown, the air-permeable channel 410 has a microporous structure. (As indicated...) Figure 4 As shown, the air vent 410 has a mesh structure.

[0042] By setting the venting channel 410 as a microporous structure or a mesh structure, the gas released from the molten intermediate layer 200 can be smoothly discharged to the external environment along the venting channel 410, effectively avoiding the generation of bubbles. At the same time, the microporous structure or mesh structure can also provide additional flow space when the adhesive overflows, preventing adhesive overflow.

[0043] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the material used for the overflow control element 400 is selected from at least one of breathable silicone, breathable rubber or breathable polyurethane.

[0044] Breathable silicone, breathable rubber, or breathable polyurethane exhibits good elastic recovery and thermal stability under high temperature and high pressure conditions. It can be compressed during hot pressing to restrict the lateral flow of the molten intermediate layer 200 and restore its original shape to maintain the spacing between the two substrates 100. At the same time, through the material's own microporous structure, mesh structure, or channels formed by mechanical processing, efficient air permeability can be achieved, ensuring the smooth discharge of gas precipitated from the molten intermediate layer 200.

[0045] It should be noted that breathable silicone possesses excellent high and low temperature resistance, superior aging resistance, and chemical stability. The microporous structure formed by foaming endows silicone with soft and elastic physical properties, giving it high compression resilience, allowing it to quickly deform and return to its original shape under external pressure. For example, open-cell foam silicone exhibits excellent breathability due to its interconnected pore structure.

[0046] Breathable rubber is characterized by low density, good elasticity, and high flexibility, and also possesses shock absorption, sound insulation, and heat insulation properties. For example, open-cell sponge rubber, due to its interconnected pores, forms excellent air permeability channels, facilitating gas penetration and exhaust.

[0047] Breathable polyurethane has the characteristics of low density, good elasticity, excellent air permeability, sound absorption and heat insulation. Its open-cell structure has interconnected micropores, which provide smooth channels for gas flow while ensuring excellent mechanical strength and resilience.

[0048] Please see Figure 1 , Figure 2 and Figure 3According to some embodiments of this application, the laminated glass 10 may optionally include a flow control element 300 disposed between the intermediate layer 200 and at least one substrate 100 for controlling the flow of the intermediate layer 200 in the molten state.

[0049] The two substrates 100 are a first substrate and a second substrate, respectively. In one embodiment, a flow control member 300 is disposed between the first substrate and the first adhesive layer 210. In another embodiment, the flow control member 300 is disposed between the second substrate and the second adhesive layer 230. In yet another embodiment, the flow control member 300 is disposed between the first substrate and the first adhesive layer 210 and between the second substrate and the second adhesive layer 230, respectively.

[0050] By setting the flow control component 300, the flow direction of the molten intermediate layer 200 can be adjusted during hot pressing to prevent the adhesive from overflowing from the edges.

[0051] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the flow control element 300 is layered and adhered to the surface of the intermediate layer 200. Specifically, the flow control element 300 covers at least one side surface of the intermediate layer 200 in the form of a film or coating and is tightly adhered to the intermediate layer 200.

[0052] By directly attaching the flow control component 300 to the surface of the intermediate layer 200, a regulating effect can be applied to the molten adhesive at the first moment when it shows a flow tendency, thereby improving the flow control response speed.

[0053] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the flow control member 300 is provided with a microporous structure, which allows the intermediate layer in the molten state to penetrate into the interior of the microporous structure.

[0054] Specifically, the microporous structure consists of multiple microchannels distributed within the flow control component 300, which can be interconnected or independent of each other. When the intermediate layer 200 is heated and melted during the hot pressing process, the molten adhesive penetrates into the microporous structure under the action of capillary effect and is temporarily stored or retained in the microchannels.

[0055] It should be noted that this application does not specifically limit the micropore structure ratio, pore size, and thickness of the micropore structure of the flow control component 300, which can be adjusted according to the flow characteristics and process requirements of the intermediate layer 200 material. For example, the pore size ranges from 10 μm to 100 μm, and the thickness ranges from 10 μm to 100 μm.

[0056] The flow control component 300 utilizes its micron-scale microporous structure as a capillary barrier or reservoir. This microporous structure undergoes surface energy modification treatment, giving it specific capillary forces on the adhesive. During hot pressing, when the adhesive comes into contact with the flow control component 300, it is selectively drawn into the microporous structure, thereby absorbing, retaining, or guiding the flow of the adhesive. By adjusting the magnitude of the capillary force, the flow control component 300 can effectively regulate the flow rate and range of the adhesive, preventing it from overflowing from the edges during molding. Exemplarily, the surface energy modification treatment can be plasma treatment or chemical coupling agent modification.

[0057] For example, when there is too much adhesive in a localized area, the microporous structure can act as a temporary reservoir to hold the excess adhesive; when there is insufficient adhesive, the adhesive in the microporous structure can be released again, thus playing a self-regulating role. In addition, surface energy modification can also prevent the adhesive from completely clogging the microporous structure, retaining some air permeable channels 410 to assist in air exhaust.

[0058] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the material used for the flow control element 300 is selected from at least one of PET film (polyethylene terephthalate film), glass fiber mat, or electrospun nanofiber film.

[0059] PET films, glass fiber mats, and electrospun nanofiber membranes all possess porous structures and good chemical stability. PET films, after being perforated or stretched, form a microporous structure with uniform pore size, exhibiting high mechanical strength and dimensional stability, and maintaining their microporous structure morphology under hot-pressing conditions. Glass fiber mats, composed of interwoven inorganic glass fibers, are characterized by high temperature resistance, non-flammability, and strong chemical inertness. The three-dimensional network microporous structure formed by the fiber gaps provides excellent capillary absorption and air permeability. Electrospun nanofiber membranes are manufactured using a high-voltage electrospinning process, with fiber diameters ranging from nanometers to submicrometers. The resulting nonwoven structure has an extremely high microporous structure ratio and specific surface area, exhibiting strong capillary adsorption capacity for molten adhesives, and is ultra-thin, flexible, and exhibits good adhesion to the substrate.

[0060] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the flow control element 300 is a rheological material layer, and the flow resistance of the rheological material layer can be adjusted by an external electric field or an external magnetic field. Specifically, the rheological material layer is an electrorheological fluid layer or a magnetorheological fluid layer.

[0061] In one embodiment, the electrorheological fluid layer is composed of high dielectric constant solid particles uniformly dispersed in an insulating base liquid and encapsulated between two flexible electrode films. This electrorheological fluid layer is disposed between the intermediate layer 200 and the substrate 100. During high-pressure hot pressing, when an overflow tendency of the molten adhesive is detected or predicted, a DC electric field is applied to the electrode films via an external power source. The apparent viscosity of the electrorheological fluid increases rapidly within milliseconds, changing from a liquid to a near-solid state, thereby significantly increasing the flow resistance to the molten adhesive and preventing it from overflowing to the edges. After the electric field is removed, the electrorheological fluid returns to a low viscosity state without affecting venting.

[0062] In another embodiment, the magnetorheological fluid layer is made by dispersing magnetizable microparticles in a carrier liquid and encapsulating them within a flexible non-magnetic film. Flexible magnetic pole pieces or external electromagnets can be disposed on both sides. This layer is disposed between the intermediate layer 200 and the substrate 100. During hot pressing, a magnetic field is applied by an external magnetic field generator, causing the viscosity of the magnetorheological fluid to increase rapidly, forming a controllable flow resistance, thereby restricting the flow of the molten adhesive. After the magnetic field is removed, the flow resistance returns to its initial state.

[0063] By adjusting the electric or magnetic field strength, continuous and reversible control of flow resistance can be achieved, thereby dynamically adapting to the risk of overflow under different temperatures, different adhesive viscosities, and different product structures.

[0064] A method for manufacturing laminated glass 10 includes the following steps:

[0065] Step 1: The flow control element 300 is disposed between the intermediate layer 200 and at least one substrate 100, and the overflow control element 400 is sandwiched between the two substrates 100 along the edge of the intermediate layer 200 to form an intermediate body;

[0066] Step 2: The intermediate is placed in an autoclave for heat treatment, so that the intermediate layer 200 melts and bonds the two substrates 100. At the same time, during the heat treatment process, the gas is discharged through the overflow control device 400 and the flow of the molten intermediate layer 200 is controlled by the flow control device 300 to obtain the laminated glass 10.

[0067] The heat treatment process is divided into three stages: high-pressure boosting, heat preservation and pressure holding, and cooling and depressurization. In the initial stage of high-pressure boosting, the residual gas between the intermediate layer 200 and the substrate 100 can be rapidly compressed by high pressure and discharged along the venting channel of the overflow control component 400, which can significantly reduce the initial bubble content.

[0068] During the heat preservation and pressure holding stage, the intermediate layer 200 fully melts and bonds the two substrates 100. At the same time, while maintaining a stable pressure, venting continues slowly. Micro-bubbles or gases released from the molten intermediate layer 200 are continuously discharged along the venting channel 410 of the overflow control component 400 under pressure. The flow control component 300 regulates the flow of the molten adhesive during this stage to prevent overflow and uneven thickness.

[0069] During the cooling and depressurization stage, as the temperature decreases, the solubility of the dissolved gas in the molten intermediate layer 200 gradually decreases. In the initial stage of cooling, the pressure is maintained at a relatively high level, allowing the precipitated gas to continue to slowly discharge along the venting channel 410 of the overflow control component 400 under pressure drive, preventing the gas from suddenly expanding and forming large bubbles due to a sudden drop in pressure. After most of the gas is discharged, the pressure is further reduced to atmospheric pressure, and the heat treatment is finally completed.

[0070] Before step 2, the following step is also included: pre-compression venting of the intermediate. By pre-compressing the intermediate, most of the interlayer air can be discharged in advance, reducing the venting burden during the autoclave stage and preventing bubbles from being compressed and difficult to escape under high pressure.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A laminated glass, characterized in that, It includes at least two substrates, an intermediate layer for connecting two adjacent substrates, and an overflow control component; The overflow control element is disposed along the edge of the intermediate layer, and the overflow control element is respectively connected to the substrate located on both sides of the intermediate layer; The overflow control component is provided with a venting channel, which connects the intermediate layer and the outside of the laminated glass.

2. The laminated glass according to claim 1, wherein the overflow control element is capable of elastic deformation.

3. The laminated glass according to claim 1, wherein the overflow control element is at least partially sandwiched between the two substrates.

4. The laminated glass according to claim 1, characterized in that, The air-permeable channel has a microporous structure or a mesh structure.

5. The laminated glass according to claim 1, characterized in that, The material used in the overflow control component is selected from at least one of breathable silicone, breathable rubber, or breathable polyurethane.

6. The laminated glass according to claim 1, characterized in that, The laminated glass further includes a flow control element disposed between the intermediate layer and at least one of the substrates, for controlling the flow of the intermediate layer in a molten state.

7. The laminated glass according to claim 6, characterized in that, The flow control element is layered and adheres to the surface of the intermediate layer.

8. The laminated glass according to claim 6, characterized in that, The flow control component has a microporous structure inside, which allows the intermediate layer in the molten state to penetrate into the interior of the microporous structure.

9. The laminated glass according to claim 6, characterized in that, The material used in the flow control component is selected from at least one of PET film, glass fiber mat, or electrospun nanofiber film.

10. The laminated glass according to claim 1, characterized in that, The laminated glass also includes a flow control element, which is a rheological material layer. The flow resistance of the rheological material layer can be adjusted by an external electric field or an external magnetic field.

11. The laminated glass according to claim 1, characterized in that, The intermediate layer includes at least one adhesive layer, which includes at least one of polyvinyl butyral (PVB), polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), thermoplastic polyurethane elastomer (TPU), polyurethane (PU), and ionic polymer (SGP).

12. The laminated glass according to claim 11, characterized in that, The intermediate layer further includes a functional layer, which is connected to the substrate through the adhesive layer. The functional layer includes at least one of a heat insulation functional layer, an ultraviolet blocking functional layer, a heating functional layer, a dimming functional layer, a reflective functional layer, and a display functional layer.

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