A laminated glass

Abstract

The application provides a kind of laminated glass, it relates to the field of glass.The inner layer glass of laminated glass includes the following components according to mass percentage: 9%-62% of SiO2, 12%-15% of Al2O3, 12%-14% of Na2O, 6%-8% of MgO, 5%-6.5% of K2O, 0.2%-1.5% of ZrO2;The area specific gravity of the laminated glass is less than or equal to 13 kg / m 2 The area specific gravity of the laminated glass is small, the impact strength is high, and the sound insulation is good. The laminated glass can have light weight and high strength.

Description

Technical Field

[0001] This application relates to the field of glass, and more specifically, to a laminated glass. Background Technology

[0002] As automotive glass technology advances towards lightweight design, the trend towards thinner glass is evident. Reducing weight while maintaining performance specifications has become a key consumer demand. However, ensuring that strength and other properties are not compromised while achieving lighter glass remains a pressing issue. Summary of the Invention

[0003] The purpose of this application is to provide a laminated glass that aims to reduce the weight of the glass while maintaining high strength.

[0004] This application provides a technical solution.

[0005] A laminated glass comprising: an outer glass layer, an interlayer, and an inner glass layer; the interlayer is bonded to the outer glass layer; the inner glass layer is bonded to the side of the interlayer away from the outer glass layer; wherein the inner glass layer comprises, by mass percentage: 9%-62% SiO2, 12%-15% Al2O3, 12%-14% Na2O, 6%-8% MgO, 5%-6.5% K2O, and 0.2%-1.5% ZrO2; the areal density of the laminated glass is less than or equal to 13 kg / m³. 2 .

[0006] In other embodiments of this application, the inner glass comprises the following components by mass percentage: 59.5%-61.5% SiO2, 12.5%-14.5% Al2O3, 12.3%-13.5% Na2O, 6.2%-7.5% MgO, 5.2%-6.2% K2O, and 0.4%-1.2% ZrO2.

[0007] In other embodiments of this application, the material of the adhesive layer includes at least one of polyvinyl butyral, polycarbonate, ethylene vinyl acetate copolymer, thermoplastic polyurethane elastomer rubber, and polymethyl methacrylate.

[0008] In other embodiments of this application, the material of the adhesive layer further includes a modified resin ethylene-vinyl acetate copolymer, wherein the mass percentage of vinyl acetate in the modified resin ethylene-vinyl acetate copolymer is 22% to 34%.

[0009] In other embodiments of this application, the compressive stress value on the surface of the inner glass layer is greater than or equal to 800 MPa, and the depth of the compressive stress layer is greater than or equal to 28 μm.

[0010] In other embodiments of this application, the above-mentioned laminated glass has a transmittance of more than 89% for light waves with a wavelength range of 820nm-1580nm.

[0011] In other embodiments of this application, the inner glass comprises the following components by mass percentage: 59% SiO2, 13% Al2O3, 13% Na2O, 6% K2O, 7% MgO, 1% ZrO2 and 1% BaO.

[0012] In other embodiments of this application, the inner glass comprises the following components by mass percentage: 60% SiO2, 14% Al2O3, 12% Na2O, 7% K2O, 6% MgO and 1% ZrO2.

[0013] In other embodiments of this application, the inner glass comprises the following components by mass percentage: 59.5% SiO2, 13.6% Al2O3, 12.4% Na2O, 5.1% K2O, 6.7% MgO, 1.2% ZrO2 and 1.5% SrO.

[0014] The beneficial effects of the laminated glass provided in this application embodiment are:

[0015] The inner glass layer, through the synergistic effect of its various raw material components and their proportions, results in better uniformity and melting temperature properties in the molten glass. When laminated glass is used in vehicles, it contributes to vehicle weight reduction and exhibits improved weather resistance and impact strength. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded structural diagram of a laminated glass provided in an embodiment of this application.

[0018] Icons: 100 - Laminated glass; 110 - Inner glass; 120 - Outer glass; 130 - Adhesive layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0020] The laminated glass of the present application embodiment will be described in detail below.

[0021] Figure 1 This is an exploded structural diagram of a laminated glass 100 provided in an embodiment of this application. Please refer to... Figure 1 The laminated glass 100 includes an inner glass layer 110, an outer glass layer 120, and an adhesive layer 130. The inner glass layer 110 and the outer glass layer 120 are stacked. The adhesive layer 130 is located between the inner glass layer 110 and the outer glass layer 120. The inner glass layer 110 and the outer glass layer 120 are connected by the adhesive layer 130.

[0022] The inner glass comprises, by mass percentage, the following components: 9%-62% SiO2, 12%-15% Al2O3, 12%-14% Na2O, 6%-8% MgO, 5%-6.5% K2O, and 0.2%-1.5% ZrO2; the surface gravity of the laminated glass is less than or equal to 13 kg / m². 2 .

[0023] For example, the surface gravity of laminated glass can be 10 kg / m³. 2 10.5kg / m 2 11kg / m 2 11.2kg / m 2 11.6 kg / m 2 12kg / m 2 12.5kg / m 2 12.8kg / m 2 Or 13kg / m 2 etc.

[0024] SiO2 forms the three-dimensional silicon-oxygen framework in glass, existing as the basic structural unit of the silicon-oxygen tetrahedron (SiO2)4-. On one hand, it endows glass with good chemical stability, thermal stability, transparency, high softening temperature, hardness, and mechanical strength. On the other hand, it forms aluminum-silicon-oxygen anions with (AlO3)5-, providing structural support for subsequent chemical strengthening processes. Low SiO2 content leads to an increased coefficient of thermal expansion, decreased scratch resistance, and a lower glass transition temperature, also affecting the effectiveness of subsequent chemical strengthening treatments. Conversely, high SiO2 content results in a relative decrease in the content of other components. Besides the increased viscosity and difficulty in melting caused by SiO2 itself, other glass properties may change unpredictably due to variations in other components, typically reducing glass performance. The SiO2 content is generally limited to 59%-62%.

[0025] Al2O3 is a substance that improves the intrinsic strength and chemical resistance of materials, and it is also a substance that increases the ion exchange rate during chemical strengthening. When the amount is too high, the melting temperature of the material will rise, the melting difficulty will increase, and the homogenization of the material liquid will also become difficult, easily producing defects such as streaks, which is not conducive to mass production. The content of Al2O3 in this invention is controlled at 12%-15%.

[0026] Na₂O is the outer oxide of the silicate glass network, which can provide free oxygen to break the Si-O bonds, thereby

[0027] Lowering the viscosity and melting temperature of aluminosilicate glass, adjusting its coefficient of thermal expansion, and providing alkali metal Na ions makes Na-K ion exchange possible in the chemical strengthening of glass, significantly increasing the mechanical strength and thermal shock resistance of glass products. Excessive Na₂O content increases the linear coefficient of thermal expansion and reduces chemical stability; therefore, the Na₂O content is controlled at 12-14% in this invention.

[0028] K2O replaces part of Na2O. Due to the mixed alkali effect, it can improve the material properties, chemical resistance, and weather resistance of the liquid material while also being a flux. It is also an oxide that enhances the efficiency of chemical strengthening. However, if the amount used is too high, it will reduce the intrinsic strength of the material. The content of K2O in this invention is controlled at 5-6.5%.

[0029] MgO, an alkaline earth metal oxide, belongs to the glass network exosome. MgO helps lower the melting point of glass, improves homogeneity, and increases resistance to hydrolysis. MgO also stabilizes the glass, improves its durability, prevents crystallization, inhibits the movement of alkali metal ions in the glass, and similarly increases the elastic modulus of the glass. However, MgO also inhibits the chemical strengthening properties of glass and reduces the ion exchange depth. In this invention, its content is controlled at 6-8%.

[0030] ZrO2 can improve the hardness, weather resistance, refractive index, Young's modulus, etc. of materials. It is also one of the oxides that form the material skeleton. The large radius of zirconium ions can provide a larger channel for ion exchange. When the dosage is high, the melting temperature of the material will rise, the melting difficulty will increase, and the homogenization of the material liquid will also become difficult, easily producing defects such as streaks, which is not conducive to mass production. The content of ZrO2 in this invention is controlled at 0.2-1.5%.

[0031] In the above embodiments of the present invention, the synergistic effect of the various raw material components and their contents makes the glass melt have better uniformity and melting temperature, which is also conducive to the lightweight composite glass for vehicles exhibiting better weather resistance and impact resistance.

[0032] In some embodiments of this application, the inner glass comprises the following components by mass percentage: 59.5%-61.5% SiO2, 12.5%-14.5% Al2O3, 12.3%-13.5% Na2O, 6.2%-7.5% MgO, 5.2%-6.2% K2O, and 0.4%-1.2% ZrO2.

[0033] For example, in one embodiment, the inner glass comprises the following components by mass percentage: 59% SiO2, 13% Al2O3, 13% Na2O, 6% K2O, 7% MgO, 1% ZrO2 and 1% BaO.

[0034] For example, in another embodiment, the inner glass comprises the following components by mass percentage: 60% SiO2, 14% Al2O3, 12% Na2O, 7% K2O, 6% MgO and 1% ZrO2.

[0035] For example, in another embodiment, the inner glass comprises the following components by mass percentage: 59.5% SiO2, 13.6% Al2O3, 12.4% Na2O, 5.1% K2O, 6.7% MgO, 1.2% ZrO2 and 1.5% SrO.

[0036] For example, in some embodiments, the adhesive layer material includes at least one of polyvinyl butyral, polycarbonate, ethylene vinyl acetate copolymer, thermoplastic polyurethane elastomer rubber, and polymethyl methacrylate. Because the adhesive layer material is a non-crosslinked material with a low softening temperature, it softens or even melts when heated, significantly reducing its strength, mechanical properties, and adhesion, thus resulting in low structural stability of the laminated glass.

[0037] In some embodiments, the adhesive layer material further includes a modified resin ethylene-vinyl acetate copolymer, wherein the mass percentage of vinyl acetate in the modified resin ethylene-vinyl acetate copolymer is 22% to 34%. For example, the mass percentage of vinyl acetate in the modified resin ethylene-vinyl acetate copolymer is 22%, 25%, 28%, 30%, 31%, 32%, or 34%.

[0038] In some embodiments, the compressive stress value on the surface of the inner glass layer is greater than or equal to 800 MPa. For example, the compressive stress value on the surface of the inner glass layer is 800 MPa, 850 MPa, 900 MPa, 950 MPa, etc.

[0039] The compressive stress layer depth on the surface of the inner glass layer is greater than or equal to 28 μm. For example, the compressive stress layer depth on the surface of the inner glass layer is 28 μm, 29 μm, 30 μm, 32 μm, etc.

[0040] In some embodiments of this application, the laminated glass has a transmittance of more than 89% for light waves with a wavelength range of 820nm-1580nm. For example, the transmittance of the laminated glass for light waves with a wavelength range of 820nm-1580nm can be 89%, 90%, 92%, 93%, 94%, etc.

[0041] This application does not restrict the source of raw materials for laminated glass. For example, it primarily uses mineral raw materials such as quartz sand, feldspar, dolomite, calcite, and zircon powder, supplemented by chemical raw materials such as sodium carbonate, potassium carbonate, and a small amount of clarifying agents. Furthermore, when introducing alumina into the mineral raw materials such as feldspar, dolomite, and calcite, sodium oxide and potassium oxide are also introduced, thus reducing the amount of chemical raw materials such as soda ash and potassium carbonate, thereby reducing carbon emissions from the manufacture of chemical raw materials. Simultaneously, silicon dioxide is also introduced, reducing the amount of quartz sand, so that the melting difficulty of the glass batch does not increase, and the melting temperature is lowered, all contributing to the reduction of carbon emissions.

[0042] This application does not limit the preparation method of laminated glass. Methods for melting the raw material components to form glass include, but are not limited to, at least one of the following: float glass, overflow glass, top drawing glass, rolling glass, and molding glass. The aluminum glass in this application is applicable to various glass manufacturing processes; there is no strict limitation on the glass manufacturing process. A suitable manufacturing process can be selected according to actual application needs, making it widely applicable and flexible in application.

[0043] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0044] Examples 1-8, Comparative Examples 1-4

[0045] Examples 1-8 and Comparative Examples 1-4 each provide a laminated glass. In the laminated glass of Examples 1-8 and Comparative Examples 1-4, the outer glass is PANDA KING-118 soda-lime glass as the outer non-ion exchange glass plate with a thickness of 3.5 mm. At the same time, physical strengthening is carried out. The physical strengthening process is as follows: the non-ion exchange glass plate is placed in a physical strengthening furnace and preheated to a temperature of 605°C. After physical strengthening, the outer non-ion exchange glass plate is obtained.

[0046] The raw materials for the inner glass in the laminated glass of Examples 1-8 and Comparative Examples 1-4 are shown in Table 1.

[0047] Table 1

[0048] serial number <![CDATA[SiO2]]> <![CDATA[Al2O3]]> <![CDATA[Na2O]]> <![CDATA[K2O]]> MgO <![CDATA[ZrO2]]> BaO SrO Example 1 59.0 13.0 13.0 6.0 7.0 1.0 1.0 0.0 Example 2 59.5 14.5 12.0 5.0 8.0 1.0 0.0 0.0 Example 3 60.0 14.0 12.0 7.0 6.0 1.0 0.0 0.0 Example 4 62.0 13.5 13.1 5.2 6.0 0.2 0.0 0.0 Example 5 61.5 12.0 12.3 6.5 6.2 1.2 0.3 0.0 Example 6 59.5 13.6 12.4 5.1 6.7 1.2 0.0 1.5 Example 7 59.0 15.0 14.0 5.2 6.6 0.2 0.0 0.0 Example 8 60.2 13.5 13.5 5.6 6.8 0.4 0.0 0.0 Comparative Example 1 56.5 9.9 15.8 8.8 7.2 1.8 0.0 0.0 Comparative Example 2 63.0 10.5 10.5 7.8 5.2 2.0 1.0 0.0 Comparative Example 3 58.5 11.5 15.5 4.2 8.8 1.5 0.0 0.0 Comparative Example 4 58.1 10.9 11.2 7.4 8.8 2.8 0.0 0.8

[0049] The preparation methods of the inner glass in the laminated glass of Examples 1-8 and Comparative Examples 1-4 include:

[0050] The raw materials in Table 1 were mixed and loaded into a small mixer for thorough mixing. The mixture was then melted in a small experimental high-temperature furnace. The molten glass was spread and polished in a small experimental tin bath before being subjected to precision annealing and cooling in an annealing furnace. Finally, the glass was cut and ground to produce ion-exchange glass plates with a thickness of 1.1 mm. Ion exchange was performed in potassium nitrate molten salt in each embodiment under the following conditions: ion exchange temperature: 420℃; time: 4 hours.

[0051] The thickness of the inner glass layer in the laminated glass of Examples 1-8 and Comparative Examples 1-4 is 1.1 mm.

[0052] The composition of the adhesive layers in Examples 1-8 and Comparative Examples 1-4 is shown in Table 2.

[0053] Table 2

[0054]

[0055]

[0056] The laminated glass of Examples 1-8 and Comparative Examples 1-4 were tested as follows: the test results are shown in Table 3.

[0057] 1. Transmittance: Measured by a spectrophotometer.

[0058] 2. Sound Insulation: For the laminated glass obtained above, the first-order loss coefficient η from 0 to 500 Hz was measured using a centrally applied vibration method testing system (MA-5500, DS-2000) based on the mechanical impedance method (centrally applied vibration, half-width method) according to ISO / PAS16940:2004. A higher first-order loss coefficient η indicates higher sound insulation; values ​​above 0.4 are considered good.

[0059] 3. Specific gravity per unit area: Based on the mass and surface area of ​​the automotive laminated glass obtained in each example, calculate the density per unit area. The specific gravity of this surface area is set at 14 kg / m². 2 The following glass is rated as good.

[0060] 4. Impact Resistance: Impact ball throwing device, test using a hardened steel ball: mass 227g ± 2g, diameter 38mm. A device that allows the steel ball to fall freely from a specified height, or a ball throwing device capable of generating a velocity equivalent to free fall. Place the car glass on the test stand, ensuring the impact surface of the car glass is perpendicular to the incident direction of the steel ball, with an allowable deviation within 3°. When the impact height is less than or equal to 6m, the impact point of the steel ball should be within 25mm of the center of the sample; when the impact height is greater than 6m, the impact point of the steel ball should be within 50mm of the center of the sample. Evaluate the form and extent of car damage. If fragments separate from the sample, weigh the total mass of the fragments detached from the opposite side of the impact surface and the mass of the largest fragment, accurate to 0.1g.

[0061] Table 3

[0062]

[0063]

[0064] As can be seen from Table 3, compared with Comparative Examples 1-4, the laminated glass provided in Examples 1-8 has a lower surface gravity, higher impact resistance, and better sound insulation. This allows the laminated glass to achieve both lightweight and high strength.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laminated glass, characterized in that, The laminated glass comprises: Outer glass; An adhesive layer, which is bonded to the outer glass layer; An inner glass layer, wherein the inner glass layer is connected to the adhesive layer on the side away from the outer glass layer; The inner glass comprises the following components by mass percentage: 59.5%-61.5% SiO2, 12.5%-14.5% Al2O3, 12.3%-13.5% Na2O, 6.2%-7.5% MgO, 5.2%-6.2% K2O, and 0.4%-1.2% ZrO2; The compressive stress value on the surface of the inner glass layer is greater than or equal to 800 MPa, and the depth of the compressive stress layer is greater than or equal to 28 μm. The surface gravity of the laminated glass is less than or equal to 13 kg / m³. 2 The adhesive layer material also includes a modified resin ethylene-vinyl acetate copolymer, wherein the mass percentage of vinyl acetate in the modified resin ethylene-vinyl acetate copolymer is 22% to 34%.

2. The laminated glass according to claim 1, characterized in that, The adhesive layer is made of at least one of polyvinyl butyral, polycarbonate, ethylene vinyl acetate copolymer, thermoplastic polyurethane elastomer rubber, and polymethyl methacrylate.

3. The laminated glass according to claim 1, characterized in that, The laminated glass has a transmittance of more than 89% for light waves in the wavelength range of 820nm-1580nm.

4. The laminated glass according to any one of claims 1-3, characterized in that, The inner glass comprises the following components by mass percentage: 59% SiO2, 13% Al2O3, 13% Na2O, 6% K2O, 7% MgO, 1% ZrO2 and 1% BaO.

5. The laminated glass according to any one of claims 1-3, characterized in that, The inner glass comprises the following components by mass percentage: 60% SiO2, 14% Al2O3, 12% Na2O, 7% K2O, 6% MgO and 1% ZrO2.

6. The laminated glass according to any one of claims 1-3, characterized in that, The inner glass comprises the following components by mass percentage: 59.5% SiO2, 13.6% Al2O3, 12.4% Na2O, 5.1% K2O, 6.7% MgO, 1.2% ZrO2 and 1.5% SrO.

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