KR102257831B1 - Curved laminated glass and manufacturing method for curved laminated glass - Google Patents

Abstract

The present invention relates to a curved laminated glass and a method for producing a curved laminated glass.

Description

The manufacturing method of a curved laminated glass and a curved laminated glass TECHNICAL FIELD {CURVED LAMINATED GLASS AND MANUFACTURING METHOD FOR CURVED LAMINATED GLASS}

The present invention relates to a curved laminated glass and a method for producing a curved laminated glass.

Glass is a material that has been applied to various living spaces due to its unique transparency. In particular, laminated glass in which two sheets of glass are laminated is used, and a curved laminated glass in a curved shape is used depending on the purpose of which the glass is used. Further, in order to reduce the volume and weight of the curved laminated glass, a thick plate glass and a thin plate glass having a thickness thinner than that of the thick plate glass are used to manufacture the curved laminated glass.

In order to manufacture a curved laminated glass, self-weight molding, compression molding, and cold molding methods are generally used. Self-weight molding uses a molding frame that fixes the rim of the glass, raises the temperature to the vicinity of the softening point of the glass to be molded, and molds the glass by sagging the glass by its own weight. This is how to join. In addition, compression molding is a method in which the glass to be molded is sufficiently heated and then molded by pressing it into a mold formed in a predetermined shape, and then bonding the molded glass. In addition, cold forming is a method of placing another glass on a concave surface of a glass molded into a curved surface, elastically deforming the other glass using a vacuum technique, forming a curved surface, and then joining the formed glass.

However, in the case of forming a thin glass into a curved surface by using cold forming, there is a limitation in that the radius of curvature of the manufactured curved thin glass is lower than that of self-weight molding or compression molding.

Accordingly, there is a need for a technology for manufacturing a curved laminated glass having a low radius of curvature without damage by using cold forming.

The present specification is to provide a curved laminated glass and a method of manufacturing a curved laminated glass.

However, the problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

An exemplary embodiment of the present invention is a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature; A curved thick plate glass provided in contact with one surface of the bonding layer; And a curved thin plate glass provided in contact with the other surface of the bonding layer and thinner than a thickness of the curved plate glass, wherein the first radius of curvature is smaller than the second radius of curvature.

In addition, another embodiment of the present invention provides a method of manufacturing the curved laminated glass.

An exemplary embodiment of the present invention comprises the steps of preparing a curved thick plate glass; Preparing a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature; Bonding one surface of the bonding layer on the concave surface of the curved thick plate glass; Placing a plate-shaped thin plate glass thinner than the thickness of the curved plate glass on the other surface of the bonding layer; And producing a curved laminated glass by elastically deforming the thin plated glass and bonding it on the other surface of the bonding layer, wherein the first radius of curvature is smaller than the second radius of curvature. Provides a way.

According to an exemplary embodiment of the present invention, it is possible to provide a curved laminated glass including a curved thick plate glass and a curved thin plate glass having a different radius of curvature.

In the method of manufacturing a curved laminated glass according to an exemplary embodiment of the present invention, a curved laminated glass including a curved plate glass and a curved thin plate glass having a different radius of curvature can be easily manufactured.

The method of manufacturing a curved laminated glass according to an exemplary embodiment of the present invention can produce a curved laminated glass having excellent optical quality.

The effects of the present invention are not limited to the above-described effects, and effects that are not mentioned will be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is a view showing a curved laminated glass according to an exemplary embodiment of the present invention.
2 is a view showing a result of securing stiffness according to a thickness ratio of a curved thick plate glass and a curved thin plate glass according to an exemplary embodiment of the present invention.
3 is a view showing a method of manufacturing a curved laminated glass according to an embodiment of the present invention.

In the entire specification of the present application, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

Throughout this specification, when a member is said to be positioned "on" another member, this includes not only the case where a member is in contact with the other member, but also the case where another member exists between the two members.

In the entire specification of the present application, the unit "wt%" may mean a weight ratio of a component included in the member with respect to the total weight of the member.

In the entire specification of the present application, “radius of curvature” may mean the minimum value of the radius of a circular arc that is most approximated to a curved surface along all directions at minute points on the surface of a member formed into a curved surface from a plate-shaped member having a size of 300 mm wide by 300 mm long. In addition, the radius of curvature can be measured by scanning and modeling the surface of a member formed into a curved surface using a 3D scanner (Faro/Focus S). Through this, it is possible to measure the radius of curvature of a member having a short curved surface or a member having a double curved surface.

In the entire specification of the present application, the “modulus of elasticity” of a member is determined by fixing both ends of a sample prepared according to JIS-K6251-1 standard, and then applying a force in a direction perpendicular to the thickness direction of the sample under a temperature condition of 24°C. It refers to a value obtained by measuring the stress per unit area according to the strain. In this case, a tensile strength meter (Zwick/Roell Z010 UTM) or the like can be used as a measuring device.

The present inventors discovered that using a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature, a curved laminated glass in which a curved thick plate glass having a different radius of curvature and a curved thin plate glass are bonded can be manufactured. As a result, a method for manufacturing a curved laminated glass and a curved laminated glass were developed as follows.

Hereinafter, the present specification will be described in more detail.

An exemplary embodiment of the present invention is a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature; A curved thick plate glass provided in contact with one surface of the bonding layer; And a curved thin plate glass provided in contact with the other surface of the bonding layer and thinner than a thickness of the curved plate glass, wherein the first radius of curvature is smaller than the second radius of curvature.

According to an exemplary embodiment of the present invention, it is possible to provide a curved laminated glass including a curved thick plate glass and a curved thin plate glass having a different radius of curvature. Specifically, it is possible to provide a curved laminated glass in which a curved thick plate glass having a different radius of curvature and a curved thin plate glass are bonded through a bonding layer including one side having a first radius of curvature and the other side having a second radius of curvature. .

1 is a view showing a curved laminated glass according to an exemplary embodiment of the present invention. Specifically, FIG. 1 shows the other surface (B) of the bonding layer 200 having a second radius of curvature, and the curved thick plate glass 100 is provided in contact with one surface A of the bonding layer 200 having a first radius of curvature. ) Is a view showing a curved laminated glass provided in contact with the curved thin glass 300.

According to an exemplary embodiment of the present invention, the bonding layer may be a curved bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature. 1, one surface (A) of the bonding layer 200 is provided in contact with the concave surface of the curved thick plate glass 100, and the other surface (B) of the bonding layer 200 is the curved thin plate glass It may be provided in contact with the convex surface of the 300. That is, the first radius of curvature of one surface of the bonding layer may be substantially the same as the radius of curvature of the curved plate glass. The fact that the radius of curvature is substantially the same may mean not only when the radius of curvature is completely identical to each other, but also a degree that does not affect quality and optical properties even if a slight difference in the radius of curvature occurs during manufacturing. In addition, the second radius of curvature of the other surface of the bonding layer may be substantially the same as the radius of curvature of the curved thin plate glass.

The curved laminated glass according to an exemplary embodiment of the present invention may be manufactured through a method of manufacturing a curved laminated glass to be described later. The curved thick plate glass, the laminated layer, and the curved thin plate glass included in the curved laminated glass may be the same as each of the curved thick plate glass, the laminated layer, and the curved thin plate glass used in the manufacturing method of the curved laminated glass described later.

According to an exemplary embodiment of the present invention, one surface of the bonding layer may be matched with a concave surface of the curved thick plate glass, and the other surface of the bonding layer may be matched with a convex side of the curved thin plate glass. In a state in which one surface of the bonding layer and the concave surface of the curved thick plate glass are matched, a radius of curvature of one surface of the bonding layer and a radius of curvature of the curved thick plate glass are substantially the same, and that of the one surface of the bonding layer and the curved thick plate glass The concave surface is in contact, and it may mean a state in which the curved plate glass and the bonding layer form an edge together at the same position. In addition, a state in which the other surface of the bonding layer and the concave surface of the curved thin plated glass are matched may be the same as described above.

As one side of the bonding layer is matched with the concave side of the curved thick plate glass, and the other side of the bonding layer is matched with the convex side of the curved thin plate glass, the occurrence of lift between the glasses in the curved laminated glass will be suppressed. And the transmission performance of the curved laminated glass can be improved.

Therefore, the curved laminated glass according to an exemplary embodiment of the present invention may have excellent optical properties.

According to an exemplary embodiment of the present invention, the first radius of curvature of one surface of the bonding layer may be smaller than the second radius of curvature of the other surface of the bonding layer. That is, a radius of curvature of the curved thick plate glass included in the curved laminated glass may be smaller than that of the curved thin plate glass. Referring to FIG. 1, in the curved laminated glass, a radius of curvature of a convex surface may be smaller than a radius of curvature of a concave surface. Compared to the conventional curved laminated glass in which the convex and concave surfaces have the same curvature radius, the curved laminated glass has a different radius of curvature of the convex and concave surfaces, and thus can be used in a wider variety of fields.

According to an exemplary embodiment of the present invention, a ratio of the first radius of curvature and the second radius of curvature may be 1:1.2 to 1:1.8. Specifically, a ratio of the first radius of curvature and the second radius of curvature may be 1:1.4 to 1:1.6, 1:1.2 to 1:1.5, or 1:1.6 to 1:1.8. By adjusting the ratio of the first radius of curvature of one side of the bonding layer to the second radius of curvature of the other side of the bonding layer in the above-described range, it is possible to provide a curved laminated glass having various curvatures. In addition, by adjusting the ratio of the first radius of curvature and the second radius of curvature to the above-described range, the curvature radius of the curved thick plate glass and the curved thin plate glass prevent a significant difference between the It is possible to prevent deterioration of the mechanical properties and/or optical quality of the curved laminated glass. Specifically, by adjusting the ratio of the first radius of curvature to the second radius of curvature in the above-described range, it is possible to prevent the plate-shaped thin plate glass from being damaged during elastic deformation. In addition, it is possible to prevent a significant difference between the radius of curvature of the curved thick plate glass and that of the curved thin plate glass, thereby suppressing the occurrence of visual distortion of the material visible through the curved laminated glass.

According to an exemplary embodiment of the present invention, the bonding layer may have a single curved surface or a double curved surface. That is, one surface and the other surface of the bonding layer may have a single curved surface or a double curved surface. Specifically, the bonding layer may be a curved bonding layer in the form of a short curved surface having a curvature in only one direction by being formed in a single axis. In addition, the bonding layer may be a curved bonding layer in the form of a double curved surface having a curvature in multiple directions by being formed in two axes. For example, the curved bonding layer in the form of a double curved surface may have a paraboloid.

The curved thick plate glass bonded to one surface of the double curved surface bonding layer may be a curved glass having a double curved surface. For example, a plate-shaped thick plate glass may be formed in two axes to manufacture a double curved plate glass having the same radius of curvature as one side of the double curved plate bonding layer.

In addition, the curved thin plate glass bonded to the other surface of the double curved surface bonding layer may be a double curved glass. As will be described later, the plate-shaped thin plate glass may be formed into the shape of the other surface of the bonding layer in the process of being elastically deformed. That is, the plate-shaped thin plate glass is elastically deformed on the other surface of the double curved surface bonding layer, so that a curved thin plate glass having a double curved surface may be formed.

Accordingly, according to an exemplary embodiment of the present invention, it is possible to provide a curved laminated glass in the form of a single curved surface or a double curved surface.

According to an exemplary embodiment of the present invention, the first radius of curvature of one surface of the bonding layer may be 1600 R or less. That is, the radius of curvature of the curved thick plate glass may be 1600 R or less. In addition, a radius of curvature of one surface of the bonding layer and the curved plate glass may be 800 R or more and 1200 R or less, 1000 R or more and 1400 R or less, or 1200 R or more and 1600 R or less.

In addition, the radius of curvature of one side of the double curved surface bonding layer and the double curved thick plate glass may be 1600 R or less. The radius of curvature of one surface of the double curved surface bonding layer may be an average value of the radius of curvature measured at a plurality of points separated by the same distance from the center of one surface of the double curved surface bonding layer. In addition, the radius of curvature of the double curved plate glass may be a value measured in the same manner as described above.

According to an exemplary embodiment of the present invention, the second radius of curvature may be 1200 R or more and 5000 R or less. That is, the radius of curvature of the curved thin plate glass may be 1200 R or more and 5000 R or less. In addition, a radius of curvature of the other surface of the bonding layer and the curved thin plate glass may be 1500 R or more and 4500 R or less, 2000 R or more and 3500 R or less, 2200 R or more and 3000 R or less, or 2500 R or more and 2700 R or less. The curvature radius range of the curved thin plate glass described above may be a curvature radius in which damage does not occur in the elastically deformed curved thin plate glass.

In addition, the radius of curvature of the other surface of the multi-curved bonding layer and the multi-curved thin plate glass may be 1200 R or more and 5000 R or less. The other surface of the double curved surface bonding layer and the radius of curvature of the double curved sheet glass may be values measured in the same manner as described above.

According to an exemplary embodiment of the present invention, it is possible to provide a curved laminated glass in which a convex surface of a curved thin plate glass is bonded without damage on a concave surface of a curved thick plate glass having a relatively small radius of curvature. Specifically, the convex surface of the curved laminated glass may freely have a radius of curvature of the curved glass formed by the thermoforming method, and the concave surface of the curved laminated glass may have a radius of curvature capable of elastically deforming the thin glass without damage. I can.

In addition, it is possible to provide a curved laminated glass having various curvatures by adjusting the radius of curvature of the curved plate glass and the radius of curvature of the curved plate glass in the above-described range.

According to an exemplary embodiment of the present invention, soda lime glass may be used as the thick plate glass. Specifically, it is possible to adopt and use a glass commonly used as a window glass of a transportation means as the thick plate glass without any particular limitation. For example, as the thickened glass, per 100 wt% of the composition, Si0 ₂ 65 wt% or more and 75 wt% or less, Al ₂ O ₃ 0 wt% or more and 10 wt% or less, NaO ₂ 10 wt% or more and 15 wt% or less, K ₂ O 0 wt% or more and 5 wt% or less, CaO 1 wt% or more, 12 wt% or less, and MgO 0 wt% or more and 8 wt% or less can be used a soda lime glass formed from a composition. In addition, soda lime glass manufactured by a float method using a float bath, soda lime glass manufactured by a down draw method or a fusion method may be used as the thick plate glass.

According to an exemplary embodiment of the present invention, it is possible to adopt and use a glass commonly used as a window glass of a transportation means as the thin glass without any particular limitation. Specifically, an alkali-free glass may be used as the thin glass.

For example, with the thin glass, per 100 wt% of the composition, Si0 ₂ 46 wt% or more and 62 wt% or less, Al ₂ O ₃ 15 wt% or more and 29 wt% or less, MgO 3 wt% or more and 14 wt% or less, CaO 7 wt% % Or more and 16 wt% or less, and SrO 0.01 wt% or more and 5 wt% or less, and an alkali-free glass formed from a composition substantially free of alkali metal oxides may be used.

Substantially free of alkali metal oxide means that the glass contains no alkali metal oxide at all or, even if it contains some, the content is very insignificant compared to other components, and contains a negligible amount as a composition component of the glass. It can mean like. For example, the term "substantially" may mean a case where a trace amount of alkali metal elements inevitably mixed in glass from a refractory material in contact with molten glass or impurities in a glass raw material in the glass manufacturing process is contained.

According to an exemplary embodiment of the present invention, the alkali-free glass that can be used as the thin glass is an alkali-free glass containing less than 1% of an alkali metal (Li, Na, K, etc.) oxide in terms of a mass percentage in terms of oxide. Can be used. Further, as the thin glass, an alkali-free borosilicate glass or an alkali-free alumino borosilicate glass may be used. In addition, as the thin glass, a glass manufactured by a float method or a glass manufactured by a down-draw method or a fusion method may be used.

According to an exemplary embodiment of the present invention, the bonding layer is polyvinylbutyral, thermoplastic polyurethane, polyethylene, polypropylene, polystyrene, polyvinylidene fluoride ( polyvinylidenefluoride), polytetrafluoroethylene, polyethyleneterephthalate, polymethy lmethAcrylate, polyacrylonitrile, polycarbonate and acrylonitrile butadiene styrene butadiene styrene).

According to an exemplary embodiment of the present invention, a thickness ratio of the curved thick plate glass and the curved thin plate glass may be 1:0.1 to 1:0.5. Specifically, the thickness ratio of the curved plate glass and the curved plate glass may be 1:0.15 to 1:0.45, 1:0.25 to 1:0.3, 1:0.15 to 1:0.25, or 1:0.3 to 1:0.45. have. By adjusting the thickness ratio of the curved thick plate glass and the curved thin plate glass to the above-described range, it is possible to effectively suppress damage to the curved laminated glass due to a decrease in rigidity. In addition, the curved laminated glass can be effectively reduced in weight and thinner.

2 is a view showing a result of securing stiffness according to a thickness ratio of a curved thick plate glass and a curved thin plate glass according to an exemplary embodiment of the present invention. Specifically, FIG. 2 is a view showing an analysis of the amount of deflection of the central portion by applying a constant load to the central portion while fixing four corners of the curved laminated glass according to an exemplary embodiment of the present invention. In FIG. 2, the x-axis represents the total glass thickness and the y-axis represents the amount of glass sag, that is, the degree of warpage.

According to an exemplary embodiment of the present invention, an AR (Asymmetry ratio) of [thickness of curved thin glass]/[thickness of curved thick glass] may satisfy a range of 0.1 to 0.5. As AR decreases, it means that the thickness of the curved thin glass becomes thinner, and the thickness of the curved thick plate glass becomes thicker. Referring to FIG. 2, by adjusting the thickness ratio of the curved thin plate glass and the curved thick plate glass to the above-described range, the degree of warpage of the curved laminated glass may be reduced, thereby securing rigidity.

Accordingly, according to an exemplary embodiment of the present invention, by adjusting the thickness ratio of the curved thin plate glass and the curved thick plate glass to the above-described range, the effect of increasing the stiffness of the curved laminated glass, the effect of reducing weight, and the effect of thinning can be further improved.

According to an exemplary embodiment of the present invention, the thickness of the curved thin plate glass may be 0.3 mm or more and 1.0 mm or less. Specifically, the thickness of the curved thin plate glass may be 0.3 mm or more and 0.8 mm or less, 0.4 mm or more and 0.6 mm or less, 0.3 mm or more and 0.7 mm or less, or 0.5 mm or more and 0.8 mm or less. The curved laminated glass including the curved thin plate glass having a thickness in the above-described range can be effectively reduced in thickness and weight while having excellent impact resistance.

According to an exemplary embodiment of the present invention, the thickness of the curved thick plate glass may be 2 mm or more and 3 mm or less. Specifically, the thickness of the curved plate glass may be 2.5 mm or more and 3 mm or less. By adjusting the thickness of the curved thick glass to the above-described range, it is possible to prevent the impact resistance of the curved laminated glass from deteriorating. In addition, the curved laminated glass can be effectively reduced in weight and thinner.

In addition, the upper and lower limit values of the thickness of the curved thin glass and the curved thick glass may be determined in consideration of elastically absorbing an external force and a mechanical impact force applied to the curved laminated glass.

According to an exemplary embodiment of the present invention, the curved laminated glass including the curved thick plate glass and the curved thin plate glass having a thickness in the above-described range is a conventional laminate of two soda lime glasses having a thickness of about 2.1 mm. Compared to the curved laminated glass, it may have a thickness of 50% or more and 80% or less, and may have a weight of 50% or more and 80% or less. Accordingly, according to an embodiment of the present invention, it is possible to provide a curved laminated glass that is lighter and thinner than the conventional curved laminated glass.

According to an exemplary embodiment of the present invention, a compressive stress may be formed on a surface opposite to the curved thin glass surface adjacent to the curved thick glass. The curved thin plate glass may be formed by elastic deformation from the plate-shaped thin plate glass. Referring to FIG. 1, a compressive stress may be formed on a concave surface of the curved thin plate glass 300 that is elastically deformed from the end of the curved thin plate glass 300 in an inward direction. The curved laminated glass including the curved thin plate glass in which compressive stress is formed on the concave surface may be excellent in durability.

According to an exemplary embodiment of the present invention, a Vickers hardness ratio between the curved thick plate glass and the curved thin plate glass may be 1:1.1 to 1:1.3. Specifically, the Vickers hardness ratio of the curved plate glass and the curved thin plate glass may be 1:1.12 to 1:1.27, 1:1.15 to 1:1.25, or 1:1.2 to 1:1.23. The concave surface of the curved laminated glass including the curved thin plate glass having a higher hardness than the curved plate glass may have excellent wear resistance, scratch resistance, and durability.

According to an exemplary embodiment of the present invention, the Vickers hardness of the curved thin plate glass may be 5.5 GPa or more and 7 GPa or less. Specifically, the curved thin glass may have a Vickers hardness of 5.8 GPa or more and 6.9 GPa or less, 6.0 GPa or more and 6.7 GPa or less, or 6.2 GPa or more and 6.5 GPa or less. A curved laminated glass including a curved thin plate glass having a Vickers hardness value in the above-described range may have excellent impact resistance, abrasion resistance, and durability. By using a curved thin plate glass having a Vickers hardness in the above range, it is possible to prevent the impact resistance of the curved laminated glass from deteriorating. In addition, by reducing the manufacturing cost of the curved thin plate glass, it is possible to reduce the manufacturing cost of the curved laminated glass. In addition, the curved thick glass may have a Vickers hardness of 5.2 GPa or more and 5.8 GPa or less.

The Vickers hardness of the curved thin plate glass and the curved thick plate glass can be calculated by measuring the size of the mark after pressing the glass using Vickers indentation particles. Specifically, at a temperature of 24° C. and a humidity of 35 RH%, according to ASTM C1327-08 standard, the press-in load is set to 200 gf and the press-in holding time is set to 20 seconds, so that the Vickers hardness of the curved thin plate glass and the curved thick plate glass is determined. Can be measured.

According to an exemplary embodiment of the present invention, a fracture toughness ratio of the curved thick plate glass and the curved thin plate glass may be 1:1.3 to 1:1.5. Specifically, the fracture toughness ratio of the curved plate glass and the curved plate glass may be 1:1.35 to 1:1.49, 1:1.37 to 1:1.45, or 1:1.39 to 1:1.45. The curved thin plate glass has the above-described range of fracture toughness compared to the curved thick plate glass, and thus it is possible to effectively prevent a decrease in the fracture strength of the curved laminated glass.

According to an exemplary embodiment of the present invention, the fracture toughness value of the curved thin plate glass may be 1.0 MPa·m ^1/2 or more and 1.3 MPa·m ^1/2 or less. Specifically, the fracture toughness value of the curved thin glass is 1.1 MPa·m ^1/2 or more and 1.25 MPa·m ^1/2 or less, 1.15 MPa·m ^1/2 or more and 1.25 MPa·m ^1/2 or less, or 1.18 MPa· m ^1/2 or more may be less than 1.21 MPa · m ^1/2. A curved laminated glass including a curved thin plate glass having a fracture toughness value in the above-described range may have excellent impact resistance.

In addition, the fracture toughness value of the curved thick plate glass may be 0.7 MPa·m ^1/2 or more and 0.85 MPa·m ^1/2 or less. Specifically, the fracture toughness value of the curved thick glass may be 0.75 MPa·m ^1/2 or more and 0.83 MPa·m ^1/2 or less, or 0.77 MPa·m ^1/2 or more and 0.8 MPa·m ^1/2 or less.

The fracture toughness value of the curved thin plate glass and the curved thick plate glass can be measured using the indentation fracture toughness measurement method, which is a method that calculates using the crack length, indentation mark, and load after pressing until a crack occurs in the glass with Vickers indentation particles. I can. Specifically, at a temperature of 24°C and a humidity of 35RH%, based on the KS L 1600:2010 standard and the press-in load is set to 2Kgf, the fracture toughness value of the curved thin plate glass and the curved thick plate glass can be measured. .

According to an exemplary embodiment of the present invention, the ratio of the elastic modulus of the curved thick plate glass and the curved thin plate glass may be 1:1.01 to 1:1.2. Specifically, the ratio of the elastic modulus of the curved plate glass and the curved thin plate glass is 1:1.04 to 1:1.17, 1:1.06 to 1:1.15, 1:1.08 to 1:1.12, or 1:1.08 to 1:1.15 days I can. The curved thin plate glass has a modulus of elasticity in the above-described range compared to the curved plate glass, so that the curved laminated glass may have a robust structure even when it includes a curved thin plate glass that is lighter and thinner than the curved plate glass.

According to an exemplary embodiment of the present invention, the elastic modulus of the curved thin plate glass may be 70 GPa or more and 90 GPa or less. Specifically, the curved thin glass may have an elastic modulus of 73 GPa or more and 87 GPa or less, 75 GPa or more and 85 GPa or less, 78 GPa or more and 80 GPa or less, 75 GPa or more and 80 GPa or less, or 80 GPa or more and 90 GPa or less. . In addition, the curved plate glass may have an elastic modulus of 65 GPa or more and 75 GPa or less.

The elastic modulus of the curved thin glass and the curved thick glass can be measured by a three-point bending test. Specifically, the elastic modulus of the curved thin plate glass and the curved thick plate glass can be measured through a three point bending test using a tensile strength meter (Zwick/Roell Z010 UTM) in an atmosphere of 24° C. and 35 RH%. have. More specifically, the width of the sample is set to 20 mm and the support span is set to 50 mm, and the displacement and load measured through a tensile strength meter are determined by strain and stress ( stress) to derive a strain-stress (SS) curve, and then a modulus of elasticity through a slope calculated by linear fitting the SS curve.

Another embodiment of the present invention provides a method of manufacturing the curved laminated glass.

An exemplary embodiment of the present invention comprises the steps of preparing a curved thick plate glass; Preparing a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature; Bonding one surface of the bonding layer on the concave surface of the curved thick plate glass; Placing a plate-shaped thin plate glass thinner than the thickness of the curved plate glass on the other surface of the bonding layer; And producing a curved laminated glass by elastically deforming the thin plated glass and bonding it on the other surface of the bonding layer, wherein the first radius of curvature is smaller than the second radius of curvature. Provides a way.

In the method of manufacturing a curved laminated glass according to an exemplary embodiment of the present invention, a curved laminated glass including a curved plate glass and a curved thin plate glass having a different radius of curvature can be easily manufactured. Specifically, a curved laminated glass including a curved thick plate glass and a curved thin plate glass having a different radius of curvature may be manufactured by using a bonding layer including one side and the other side having different radius of curvature.

In the conventional method of manufacturing a curved laminated glass, a laminated layer and a plate-like thin plated glass are sequentially provided on the concave side of the thick plated glass formed into a curved surface through thermoforming, and the laminated glass is elastically deformed to produce a curved laminated glass. I did. At this time, the thermoforming method can produce a curved thin plate glass having a relatively small radius of curvature, but the cold forming method of elastically deforming the glass without applying heat to the glass can produce a curved thin plate glass having a relatively large radius of curvature compared to the thermoforming method. I can. That is, in the case of using the cold forming method, it is not easy to manufacture a curved thin plate glass having a small radius of curvature such as a curved thin plate glass molded by a thermoforming method. Therefore, in the case of elastically deforming the plate-shaped thin plate glass on the concave surface of the curved plate glass having a small radius of curvature that is formed by thermoforming, as in the conventional method of manufacturing a curved laminated glass, the elastically deformed thin plate glass is damaged or There was a problem of buckling. Thus, in the conventional method of manufacturing a curved laminated glass, the thick plate glass is thermoformed to a radius of curvature (hereinafter referred to as a limiting radius of curvature) at which the thin plate glass can be elastically deformed without breakage, and the thin plate glass is elastically deformed to bond the curved surface. Glass was made. That is, the radius of curvature of the convex surface and the concave surface of the curved laminated glass to be manufactured has a limit that cannot but have a radius of curvature of the curved glass formed by the cold forming method.

On the other hand, according to an exemplary embodiment of the present invention, by using a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature, a curved thick plate having a radius of curvature smaller than the limit radius of curvature of the cold forming method Even when the plate-shaped thin plate glass is elastically deformed and bonded on the concave surface of the glass, it is possible to easily manufacture a curved laminated glass having a desired curvature without damage to the curved thin plate glass. That is, the convex surface of the curved laminated glass to be manufactured may have a radius of curvature smaller than the limit radius of curvature of the cold forming method.

Accordingly, the method of manufacturing a curved laminated glass according to an exemplary embodiment of the present invention can produce a curved laminated glass having a smaller curvature than a curved laminated glass produced by a conventional cold forming method.

3 is a view showing a method of manufacturing a curved laminated glass according to an embodiment of the present invention. Specifically, FIG. 3 shows a plate-shaped thin plate glass on the concave surface of the curved thick plate glass 100 by contacting one surface A of the bonding layer 200 and on the other concave surface B of the bonding layer 200. 300), and then elastically deforming the thin glass 300 to produce a curved laminated glass.

According to an exemplary embodiment of the present invention, in the step of preparing the curved thick plate glass, the thick plate glass may be formed into a curved surface by using a known method of forming the glass into a curved surface in the art. For example, a curved thick plate glass may be manufactured using a self-weight molding method or a compression molding method.

According to an exemplary embodiment of the present invention, in the step of preparing the bonding layer, a bonding layer including one surface having a first radius of curvature substantially equal to the radius of curvature of the curved plate glass may be prepared. The fact that the radius of curvature is substantially the same may mean not only when the radius of curvature is completely identical to each other, but also a degree that does not affect quality and optical properties even if a slight difference in the radius of curvature occurs during manufacturing. That is, the radius of curvature of the curved thick plate glass and the radius of curvature of one surface of the bonding layer may be the same.

According to an exemplary embodiment of the present invention, the thin plate glass elastically deformed on the other surface of the bonding layer may be formed into a curved thin plate glass having the same shape as that of the other surface of the bonding layer. That is, the curved thin glass may have the same radius of curvature as the second radius of curvature of the other surface of the bonding layer. Specifically, in the process of elastically deforming the plate-shaped thin plated glass, the thin plated glass is elastically deformed by being supported on the other surface of the bonding layer, and the convex side of the elastically deformed curved thin plated glass matches the concave side of the bonding layer. Can be. Accordingly, the plate-shaped thin plate glass may be formed into a curved thin plate glass having the same radius of curvature as the second radius of curvature of the other surface of the bonding layer.

According to an exemplary embodiment of the present invention, in the preparing of the bonding layer, one surface having a first radius of curvature and the other surface having a second radius of curvature are formed by using a known method of imparting curvature to a member in the art. It is possible to prepare a bonding layer containing. For example, after forming the plate-shaped bonding layer into a curved surface, one surface of the bonding layer may be polished to have a first radius of curvature, and the other surface of the bonding layer may be polished to have a second radius of curvature. Alternatively, a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature may be manufactured by cutting one surface and the other surface of the bonding layer formed into a curved surface with a laser.

According to an exemplary embodiment of the present invention, the method of manufacturing the curved laminated glass may elastically deform the thin plated glass at a temperature of 20° C. or more and 35° C. or less. Accordingly, the method of manufacturing the curved laminated glass can shape the thin plated glass into a curved surface without applying heat to the glass, thereby reducing the manufacturing cost of the curved laminated glass. Further, by omitting the step of slow cooling the glass, the manufacturing time of the curved laminated glass can be shortened.

The method of elastically deforming the plate-shaped thin glass is not particularly limited as long as it is a method commonly used in the art. For example, through a compression process using a high-temperature roller or a vacuum ring/vacuum bag process, the plate-shaped thin plate glass may be elastically deformed at a temperature of 20° C. or more and 35° C. or less.

According to an exemplary embodiment of the present invention, compressive stress may be formed in the concave surface of the curved thin plate elastically deformed from the plate-shaped thin plate glass. Referring to FIG. 3, on the concave surface of the curved thin plate glass 300 that is elastically deformed, a compressive stress may be formed in an inward direction from the end of the curved thin plate glass 300. The curved laminated glass including the curved thin plate glass in which compressive stress is formed on the concave surface may have excellent mechanical properties.

According to an exemplary embodiment of the present invention, a ratio of the first radius of curvature and the second radius of curvature may be 1:1.2 to 1:1.8. That is, a ratio of a radius of curvature of the curved thick plate glass and the curved thin plate glass may be 1:1.2 to 1:1.8. In addition, a ratio of the first radius of curvature and the second radius of curvature of the bonding layer may be 1:1.4 to 1:1.6, 1:1.2 to 1:1.5, or 1:1.6 to 1:1.8. By adjusting the ratio of the first radius of curvature of one side of the bonding layer to the second radius of curvature of the other side of the bonding layer in the above-described range, it is possible to provide a curved laminated glass having various curvatures. In addition, by adjusting the ratio of the first radius of curvature and the second radius of curvature to the above-described range, the curvature radius of the curved thick plate glass and the curved thin plate glass prevent a significant difference between the It is possible to prevent deterioration of the mechanical properties and/or optical quality of the curved laminated glass. Specifically, by adjusting the ratio of the first radius of curvature to the second radius of curvature in the above-described range, it is possible to prevent the plate-shaped thin plate glass from being damaged during elastic deformation. In addition, it is possible to prevent a significant difference between the radius of curvature of the curved thick plate glass and that of the curved thin plate glass, thereby suppressing the occurrence of visual distortion of the material visible through the curved laminated glass.

According to an exemplary embodiment of the present invention, the bonding layer may have a single curved surface or a double curved surface. That is, one surface and the other surface of the bonding layer may have a single curved surface or a double curved surface. Specifically, the bonding layer may be a curved bonding layer in the form of a short curved surface having a curvature in only one direction by being formed in a single axis. In addition, the bonding layer may be a curved bonding layer in the form of a double curved surface having a curvature in multiple directions by being formed in two axes. For example, the curved bonding layer in the form of a double curved surface may have a paraboloid.

The curved thick plate glass bonded to one surface of the double curved surface bonding layer may be a curved glass having a double curved surface. For example, a plate-shaped thick plate glass may be formed in two axes to manufacture a double curved plate glass having the same radius of curvature as one side of the double curved plate bonding layer.

In addition, the curved thin plate glass bonded to the other surface of the double curved surface bonding layer may be a double curved glass. Specifically, the plate-shaped thin plate glass is elastically deformed on the other surface of the double curved surface bonding layer, so that a curved thin plate glass having a double curved surface may be formed.

Accordingly, according to an exemplary embodiment of the present invention, it is possible to manufacture a curved laminated glass in the form of a single curved surface or a double curved surface.

According to an exemplary embodiment of the present invention, the first radius of curvature of one surface of the bonding layer may be 1600 R or less. That is, the radius of curvature of the curved thick plate glass may be 1600 R or less. In addition, a radius of curvature of one surface of the bonding layer and the curved plate glass may be 800 R or more and 1200 R or less, 1000 R or more and 1400 R or less, or 1200 R or more and 1600 R or less. In addition, the radius of curvature of one side of the double curved surface bonding layer and the double curved thick plate glass may be 1600 R or less.

According to an exemplary embodiment of the present invention, the second radius of curvature may be 1200 R or more and 5000 R or less. That is, the radius of curvature of the curved thin plate glass may be 1200 R or more and 5000 R or less. In addition, the radius of curvature of the other surface of the bonding layer and the curved thin plate glass may be 1500 R or more and 4500 R or less, 2000 R or more and 3500 R or less, 2200 R or more and 3000 R or less, or 2500 R or more and 2700 R or less. The curvature radius range of the curved thin plate glass described above may be a curvature radius in which damage does not occur in the elastically deformed curved thin plate glass.

In addition, the radius of curvature of the other surface of the multi-curved bonding layer and the multi-curved thin plate glass may be 1200 R or more and 5000 R or less.

According to an exemplary embodiment of the present invention, on the concave surface of the curved thick plate glass having a relatively small radius of curvature, the convex surface of the curved thin plate glass can be bonded without damage. In addition, by adjusting the radius of curvature of the curved plate glass and the radius of curvature of the curved plate glass in the above-described range, a curved laminated glass having various curvatures can be implemented.

According to an exemplary embodiment of the present invention, the bonding layer may be in a solid state at a temperature of 25° C. or more and 140° C. or less. The bonding layer, which is solid in the above-described range, can maintain the solid state at 20°C or more and 35°C or less, which is a temperature range for elastically deforming the plate-like thin plate glass. Therefore, in the process of elastically deforming the plate-shaped thin plate, the bonding layer can effectively support the thin plate, and improve the surface quality of the curved thin plate glass to be manufactured. In addition, as described later, in a temperature range of 80°C or more and 140°C or less, which is a temperature range for post-treating the curved laminated glass, the bonding layer can be maintained in a solid state, thereby preventing the shape of the curved laminated glass from being deformed.

According to an exemplary embodiment of the present invention, a curved laminated glass having excellent optical quality may be manufactured by using a solid bonding layer in the above-described temperature range. In the process of providing the bonding layer on the concave surface of the curved plate glass, foreign matter may be introduced between the curved plate glass and the bonding layer. In addition, in the process of providing the plate-shaped thin plate glass on the concave surface of the bonding layer, foreign matter may be introduced between the bonding layer and the plate-shaped thin plate glass. However, in the process of elastically deforming the plate-shaped thin plate glass by putting the plate-shaped thin plate glass, the laminated layer, and the curved plated glass into a vacuum bag and making the inside of the vacuum bag in a vacuum state, between the curved plate glass and the laminated layer, the curved thin plate glass Foreign matter remaining between the and the bonding layer may be discharged to the outside of the curved laminated glass.

On the other hand, in the case of using the liquid bonding layer, foreign matter flowing into the liquid bonding layer cannot be discharged to the outside during the elastic deformation of the thin plated glass, and bubbles in the liquid bonding layer during the elastic deformation of the plate-shaped thin plate glass. May occur. In addition, when a liquid bonding layer is used, there is a problem that it is not easy to elastically deform the thin glass. That is, when a liquid bonding layer is used, it is difficult to elastically deform the thin plated glass, and there may be a problem in that the optical quality of the curved laminated glass to be manufactured is deteriorated.

Accordingly, according to an exemplary embodiment of the present invention, by using the solid bonding layer, it is possible to manufacture a curved laminated glass excellent in optical quality.

According to an exemplary embodiment of the present invention, the elastic modulus of the bonding layer may be 10 MPa or more and 3000 MPa or less. Specifically, according to JIS-K6251-1, the modulus of elasticity of the bonding layer measured in an atmosphere of 24° C. and 35 RH% may be 10 MPa or more and 3000 MPa or less. In addition, the elastic modulus of the bonding layer is 50 MPa or more and 2500 MPa or less, 100 MPa or more and 2000 MPa or less, 500 MPa or more and 1500 MPa or less, 700 MPa or more and 1000 MPa or less, 10 MPa or more and 500 MPa or less, 600 MPa or more and 2000 MPa or less. , 2200 MPa or more and 3000 MPa or less. The bonding layer having a modulus of elasticity in the above-described range can effectively support the thin plate glass in the process of elastically deforming the plate-shaped thin plate glass, and cracks, buckling, etc. are generated on the surface of the curved thin plate glass to be manufactured. Can be suppressed. On the other hand, in the case of using a liquid bonding layer, the liquid bonding layer cannot effectively support the elastically deformed sheet glass, so that the manufactured curved sheet glass may be damaged, or cracks and buckling may occur on the surface of the curved sheet glass. I can.

Accordingly, according to an exemplary embodiment of the present invention, by using a bonding layer having a modulus of elasticity in the above-described range, it is possible to manufacture a curved laminated glass including a curved thin plate glass having excellent surface quality.

According to an exemplary embodiment of the present invention, as long as the bonding layer satisfies the above-described physical properties, those used as the bonding layer in the art may be used without limitation. For example, the bonding layer is polyvinylbutyral, thermoplastic polyurethane, polyethylene, polypropylene, polystyrene, polyvinylidenefluoride, and polytetrafluoro. At least one of polytetrafluoroethylene, polyethyleneterephthalate, polymethy lmethAcrylate, polyacrylonitrile, polycarbonate, and acrylonitrile butadiene styrene It may include.

According to an exemplary embodiment of the present invention, the method of manufacturing the curved laminated glass further comprises the step of post-treating the curved laminated glass in a temperature of 80°C or more and 140°C or less and a pressure atmosphere of 5 bar or more and 20 bar or less. I can. By post-treating the manufactured curved laminated glass in the above-described atmosphere, materials such as plasticizers included in the bonding layer may be removed to make the bonding layer hard. In addition, it is possible to improve bonding strength between the curved thick plate glass and the bonding layer, and between the bonding layer and the curved thin plate glass.

Hereinafter, examples will be described in detail in order to describe the present invention in detail. However, the embodiments according to the present invention may be modified in various forms, and the scope of the present invention is not construed as being limited to the embodiments described below. The embodiments of the present specification are provided to more completely describe the present invention to those of ordinary skill in the art.

Example One

_{An alkali-free glass having a thickness of 0.5 mm containing 61 wt% of Si0 2,} 61 wt% of Al ₂ O _3, 16 wt% of Al 2 O 3, 8 wt% of MgO, 8 wt% of CaO, and 0.05 wt% of SrO per 100 wt% of glass It was prepared as, and contains 72 wt% of _{Si0 2} per 100 wt% of glass, 0.15 wt% of _{Al 2} O ₃ , 14 wt% of _{Na 2 O, 0.03 wt% of K 2} O, and 9 wt% of CaO and 4 wt% of MgO, and Soda lime glass having a thickness of 2.0 mm was prepared as a thick glass. The alkali-free glass had an elastic modulus of 78 GPa, a Vickers hardness of 6.3 GPa, and a fracture toughness of 1.20 MPa·m ^1/2 , and the soda lime glass had an elastic modulus of 72 GPa, Vickers hardness of 5.6 GPa, and fracture toughness of 0.85. It was MPa·m ^1/2 . In addition, a solid polyvinyl butyral (EASTMAN) film was prepared as the bonding layer, and the elastic modulus of the bonding layer measured at 24° C. and 35 RH% atmosphere was 505 Mpa.

First, the thick plate glass was heated at 600° C. for 60 seconds and formed into a curved surface using its own weight, thereby manufacturing a curved thick plate glass. The radius of curvature of the curved thick glass was about 1000 R. Thereafter, the bonding layer was formed into a curved surface, and one side and the other side of the bonding layer were polished to prepare a curved bonding layer having a radius of curvature of about 1000 R on one side and a radius of curvature of about 1300 R on the other side.

Thereafter, one convex side of the bonding layer was bonded to the concave side of the curved thick plate glass in a vacuum bag, and the thin plate glass was positioned adjacent to the concave side of the bonding layer. Thereafter, the vacuum bag was sealed and compressed with a vacuum ring in an atmosphere of about 20° C. and 0.4 torr to elastically deform the plate-shaped thin glass to prepare a curved laminated glass in which the curved thin glass was bonded on the other surface of the bonding layer. Thereafter, the curved laminated glass was removed from the vacuum bag, put into an autoclave, and treated under conditions of 130° C. and 10 bar to finally prepare a curved laminated glass.

It was confirmed that the manufactured curved laminated glass had a radius of curvature of about 1000 R on the convex side and a radius of curvature of about 1300 R on the concave side. In addition, it was confirmed that no cracks or buckling occurred in the curved thin plate glass included in the manufactured curved laminated glass, and that no levitation and air bubbles were generated between the curved thin plate glass and the bonding layer, and between the curved plate glass and the bonding layer. Confirmed.

Example 2

The same thick glass and thin glass as in Example 1 were prepared. Thereafter, in the same manner as in Example 1, a curved thick plate glass having a radius of curvature of about 1000 R was manufactured. Thereafter, a thermoplastic polyurethane film (EASTMAN) with an elastic modulus of 505 Mpa was prepared as a bonding layer, the bonding layer was molded into a curved surface, and one side and the other side of the bonding layer were polished. A curved bonding layer having a radius of curvature of about 1400 R was prepared.

Thereafter, in the same manner as in Example 1, a curved laminated glass was manufactured. It was confirmed that the prepared curved laminated glass had a radius of curvature of about 1000 R on the convex side and a radius of curvature of about 1400 R on the concave side. In addition, it was confirmed that no cracks or buckling occurred in the curved thin plate glass included in the manufactured curved laminated glass, and that no levitation and air bubbles were generated between the curved thin plate glass and the bonding layer, and between the curved plate glass and the bonding layer. Confirmed.

Comparative example One

The same thick glass and thin glass as in Example 1 were prepared. Thereafter, in the same manner as in Example 1, a curved thick plate glass having a radius of curvature of about 1000 R was manufactured. Thereafter, a thermoplastic polyurethane film (EASTMAN) having an elastic modulus of 505 Mpa was prepared as a bonding layer, and a curved bonding layer having a radius of curvature of about 1000 R on one side and the other side was prepared.

Thereafter, in the same manner as in Example 1, the thin glass was elastically deformed on the other surface of the bonding layer. It was confirmed that lift occurred between the elastically deformed sheet glass and the bonding layer, and a number of breakages occurred in the elastically deformed sheet glass.

Comparative example 2

The same thick glass and thin glass as in Example 1 were prepared. Thereafter, in the same manner as in Example 1, a curved thick plate glass having a radius of curvature of about 1000 R was manufactured. Thereafter, a thermoplastic polyurethane film (EASTMAN) with an elastic modulus of 505 Mpa was prepared as a bonding layer, the bonding layer was molded into a curved surface, and one side and the other side of the bonding layer were polished. A curved bonding layer having a radius of curvature of about 1900 R was prepared.

Thereafter, in the same manner as in Example 1, the thin glass was elastically deformed on the other surface of the bonding layer. It was confirmed that no cracks or buckling occurred in the curved thin plate glass included in the manufactured curved laminated glass, but when observing the object through the curved laminated glass, it was confirmed that the shape of the object was visually greatly distorted.

Comparative example 3

The same thick glass and thin glass as in Example 1 were prepared. Thereafter, in the same manner as in Example 1, a curved thick plate glass having a radius of curvature of about 1000 R was manufactured. Thereafter, a liquid adhesive (UVLAM, Kalentec Co.) was applied on the concave surface of the curved thick plate glass.

Thereafter, the thin glass was laminated on the liquid adhesive in the vacuum bag, the vacuum bag was sealed, and then compressed with a vacuum ring in an atmosphere of about 20° C. and 0.4 torr, but it was confirmed that the thin glass was not elastically deformed.

Accordingly, the method of manufacturing a curved thin plate glass according to an exemplary embodiment of the present invention can easily bond a curved thin plate glass and a curved thick plate glass having a different radius of curvature. In addition, the manufactured curved thin plate glass may have excellent mechanical properties and/or optical properties.

100: plate glass
200: bonding layer
300: laminated glass

Claims (16)

A bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature;
A curved thick plate glass provided in contact with one surface of the bonding layer; And
Including; provided in contact with the other surface of the bonding layer, the curved thin plate glass thinner than the thickness of the curved plate glass,
The first radius of curvature is smaller than the second radius of curvature,
The ratio of the first radius of curvature and the second radius of curvature is 1:1.2 to 1:1.8,
The curved laminated glass is that the radius of curvature of the curved thick plated glass is smaller than that of the curved thin plated glass. delete The method according to claim 1,
The second radius of curvature is 1200 R or more and 5000 R or less. The method according to claim 1,
The bonding layer is a curved laminated glass having a single curved surface or a double curved surface. The method according to claim 1,
One surface of the bonding layer is matched with a concave surface of the curved plate glass, and the other surface of the bonding layer is matched with a convex surface of the curved plate glass. The method according to claim 1,
The curved laminated glass, wherein a compressive stress is formed on a surface opposite to the curved thin glass surface adjacent to the curved thick glass. The method according to claim 1,
The curved laminated glass has a thickness ratio of 1:0.1 to 1:0.5 between the curved plate glass and the curved plate glass. The method according to claim 1,
The curved laminated glass has a thickness of 0.3 mm or more and 1.0 mm or less. Preparing a curved thick plate glass;
Preparing a bonding layer including one surface having a first radius of curvature and the other surface having a second radius of curvature;
Bonding one surface of the bonding layer on the concave surface of the curved thick plate glass;
Placing a plate-shaped thin plate glass thinner than the thickness of the curved plate glass on the other surface of the bonding layer; And
Including; elastically deforming the thin glass, and bonding it on the other surface of the bonding layer to produce a curved laminated glass; Including,
The first radius of curvature is smaller than the second radius of curvature,
The ratio of the first radius of curvature and the second radius of curvature is 1:1.2 to 1:1.8,
The curvature radius of the curved thick plate glass is smaller than the curvature radius of the elastically deformed thin plate glass. delete The method of claim 9,
The second radius of curvature is 1200 R or more and 5000 R or less. The method of claim 9,
The method of manufacturing a curved laminated glass, wherein the bonding layer has a single curved surface or a double curved surface. The method of claim 9,
The method of manufacturing a curved laminated glass, wherein the bonding layer has an elastic modulus of 10 MPa or more and 3000 MPa or less. The method of claim 9,
The method for producing a curved laminated glass wherein the bonding layer is solid at a temperature of 25°C or more and 140°C or less. The method of claim 9,
A method for producing a curved laminated glass, wherein the thin glass is elastically deformed at a temperature of 20°C or more and 35°C or less. The method of claim 9,
The method of manufacturing a curved laminated glass further comprising the step of post-treating the curved laminated glass at a temperature of 80° C. or more and 140° C. or less and a pressure atmosphere of 5 bar or more and 20 bar or less.

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