阅读说明：本技术 装饰玻璃面板及其制造方法 (Decorative glass panel and method for manufacturing same ) 是由 光木卓志 重田裕康 滨大地 谷口忠壮 于 2018-04-10 设计创作，主要内容包括：本发明的目的在于提供一种具有立体的金属外观设计的装饰玻璃面板以及提高了生产率的装饰玻璃面板的制造方法。装饰玻璃面板10具备玻璃基材15、形成于玻璃基材15之上的粘接层11、形成于粘接层11之上的凹凸图案层12以及形成于凹凸图案层12之上的金属蒸镀层13。玻璃基材15中的作为玻璃基材15的背面的一部分的、从平面部30弯折至立起部31的部分成为曲面32。凹凸图案层12在作为其上表面的金属蒸镀层13侧的面上具有由凹部40以及凸部41形成的凹凸图案。装饰玻璃面板10例如应用于移动终端的壳体。(The invention aims to provide a decorative glass panel with a three-dimensional metal appearance design and a manufacturing method of the decorative glass panel with improved productivity. The decorative glass panel 10 includes a glass substrate 15, an adhesive layer 11 formed on the glass substrate 15, an uneven pattern layer 12 formed on the adhesive layer 11, and a metal deposition layer 13 formed on the uneven pattern layer 12. A portion of the glass substrate 15 that is a portion of the back surface of the glass substrate 15 and that is bent from the flat portion 30 to the rising portion 31 is a curved surface 32. The uneven pattern layer 12 has an uneven pattern formed by concave portions 40 and convex portions 41 on the surface on the metal deposition layer 13 side as the upper surface thereof. The decorative glass panel 10 is applied to, for example, a housing of a mobile terminal.)

1. A decorative glass panel comprising a glass substrate having one surface at least a part of which is curved, a concave-convex pattern layer having a concave-convex pattern on the upper surface thereof and formed on the one surface of the glass substrate, and a metal deposition layer formed on the upper surface of the concave-convex pattern layer.

2. The decorative glass panel according to claim 1, further comprising a base sheet formed between the glass substrate and the embossed pattern layer.

3. The decorative glass panel according to claim 1 or 2, wherein the metal vapor-deposited layer is formed by laminating a plurality of layers having different refractive indices.

4. The decorative glass panel according to claim 3, wherein the refractive indices of the layers adjacent in the lamination direction in the metal deposition layer are different.

5. A method for manufacturing a decorative glass panel, comprising:

preparing a glass substrate having a curved surface on at least a part of one surface;

preparing a decorative sheet having a concave-convex pattern layer having a concave-convex pattern on a lower surface thereof formed on a base sheet;

a step of fixing the glass substrate to the decorative sheet so that the one surface of the glass substrate faces the uneven pattern layer of the decorative sheet;

a step of peeling off the base sheet of the decorative sheet and transferring the uneven pattern layer onto the glass base material; and

and forming a metal deposition layer on the upper surface of the concave-convex pattern layer.

6. A method for manufacturing a decorative glass panel, comprising:

preparing a glass substrate having a curved surface on at least a part of one surface;

preparing a decorative sheet having a concave-convex pattern layer having a concave-convex pattern on an upper surface thereof formed on a base sheet;

a step of fixing the glass base material and the decorative sheet so that the one surface of the glass base material faces the base sheet of the decorative sheet; and

and forming a metal deposition layer on the upper surface of the concave-convex pattern layer.

Technical Field

The present invention relates to a decorative glass panel and a method for manufacturing the same, and more particularly to a decorative glass panel having a metal deposition layer and a method for manufacturing the same.

Background

There are glass products decorated with a metal vapor deposition layer, and as a method for producing such glass products, there are a method using a decorative sheet (see patent document 1) and a method of directly performing metal vapor deposition on a glass substrate (see patent document 2). In the method using the decorative sheet, a decorative sheet having a metal vapor-deposited layer provided on a base sheet as a support is used. In addition, when a three-dimensional metal design is expressed, an uneven pattern layer is further provided between the base sheet and the metal deposition layer. The decorative sheet is attached to a glass substrate, or a metal vapor deposition layer and a concave-convex pattern layer on the decorative sheet are transferred from a base sheet to the glass substrate, whereby a glass product having a three-dimensional metallic appearance design is produced. In a method of directly performing metal deposition on a glass substrate, a glass substrate is set in a vacuum deposition tank, and a metal deposition layer of metal, oxide, or the like is formed by a vacuum deposition method, thereby producing a glass product having a three-dimensional metal design.

Disclosure of Invention

Problems to be solved by the invention

In the conventional glass product and the manufacturing method thereof as described above, when the glass substrate is a curved surface, in the method using the decorative sheet, when the decorative sheet is attached to the glass substrate, the metal vapor-deposited layer may not follow the curved surface of the glass substrate and cracks may occur. In the method of directly performing metal vapor deposition on a glass substrate, there is a possibility that the glass strength is deteriorated by a metal, an oxide, or the like deposited on the glass substrate.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a decorative glass panel having a three-dimensional metallic design and a method for manufacturing a decorative glass panel with improved productivity.

Means for solving the problems

In order to achieve the above object, a first aspect of the present invention is a decorative glass panel including a glass substrate having a curved surface at least a part of one surface, an uneven pattern layer formed on one surface of the glass substrate and having an uneven pattern on an upper surface thereof, and a metal deposition layer formed on an upper surface of the uneven pattern layer.

With such a configuration, since the metal vapor-deposited layer is formed on the curved surface of the glass substrate via the uneven pattern layer, the decorative glass panel having a three-dimensional metal design in which the metal vapor-deposited layer is reliably fixed to the curved surface is obtained.

A second aspect of the present invention is a decorative glass panel, further comprising a base sheet formed between the glass substrate and the uneven pattern layer, in addition to the configuration of the first aspect of the present invention.

With such a configuration, the decorative glass panel can be decorated with the base sheet, and therefore, the decorative glass panel can be combined with the metal vapor deposition layer to provide a decorative glass panel having a higher design.

A third aspect of the present invention is the decorative glass panel according to the first or second aspect of the present invention, wherein the metal vapor deposition layer is formed by laminating a plurality of layers having different refractive indices.

With such a configuration, light is reflected between the layers having different refractive indices, and light interference occurs, so that a glossy feeling of a rainbow pattern can be obtained.

A fourth aspect of the present invention is the decorative glass panel according to the third aspect of the present invention, wherein the metal deposition layers have different refractive indices of layers adjacent to each other in the stacking direction.

With such a configuration, light is reflected between all the layers, and interference of light is more generated, so that a glossy feeling of a rainbow-like pattern with a higher design can be obtained.

A fifth aspect of the present invention is a method for manufacturing a decorative glass panel, including: preparing a glass substrate having a curved surface on at least a part of one surface; preparing a decorative sheet having a concave-convex pattern layer having a concave-convex pattern on a lower surface thereof formed on a base sheet; a step of fixing the glass substrate to the decorative sheet so that one surface of the glass substrate faces the uneven pattern layer of the decorative sheet; peeling off the base sheet of the decorative sheet and transferring the uneven pattern layer on the glass substrate; and forming a metal deposition layer on the upper surface of the concave-convex pattern layer.

With this configuration, since the metal deposition layer is formed on the uneven pattern layer formed on the curved surface of the glass substrate by transfer, it is possible to reliably form a metallic design having a predetermined uneven pattern on the curved surface of the glass substrate while preventing metal cracks.

A sixth aspect of the present invention is a method for manufacturing a decorative glass panel, including: preparing a glass substrate having a curved surface on at least a part of one surface; preparing a decorative sheet having a concave-convex pattern layer having a concave-convex pattern on an upper surface thereof formed on a base sheet; a step of fixing the glass base material and the decorative sheet so that one surface of the glass base material faces the base sheet of the decorative sheet; and forming a metal deposition layer on the upper surface of the concave-convex pattern layer.

With such a configuration, since the metal deposition layer is formed on the uneven pattern layer formed on the curved surface of the glass substrate by lamination, it is possible to reliably form a metallic design having a predetermined uneven pattern on the curved surface of the glass substrate while preventing metal cracks.

Effects of the invention

According to the present invention, a decorative glass panel having a metal deposition layer formed on a curved surface can be efficiently obtained.

Drawings

Fig. 1 (a) is a plan view of a decorative glass panel according to a first embodiment of the present invention, fig. 1 (b) is a bottom view of the decorative glass panel shown in fig. 1 (a), fig. 1 (c) is a sectional view taken along the line I-I shown in fig. 1 (a) and (b), and fig. 1 (d) is a sectional view taken along the line II-II shown in fig. 1 (a) and (b).

Fig. 2 (a) and (b) are cross-sectional views showing examples of the uneven pattern layer of the decorative sheet used in each embodiment of the present invention.

Fig. 3 (a) is a plan view showing an example of the uneven pattern layer of the decorative sheet used in each embodiment of the present invention. Fig. 3 (b) is a sectional view taken along the line III-III in fig. 3 (a), and fig. 3 (c) is a sectional view taken along the line IV-IV in fig. 3 (a).

Fig. 4 (a) is a plan view showing an example of the uneven pattern layer of the decorative sheet used in each embodiment of the present invention. Fig. 4 (b) is a sectional view taken along line V-V shown in fig. 4 (a), and fig. 4 (c) is a sectional view taken along line VI-VI shown in fig. 4 (a).

Fig. 5 (a) is a cross-sectional view of a decorative sheet used for manufacturing the decorative glass panel shown in fig. 1, and fig. 5 (b) to 5 (d) are schematic views showing a manufacturing process of the decorative glass panel shown in fig. 1.

Fig. 6 is a cross-sectional view of a decorative glass panel according to a second embodiment of the present invention, where (a) in fig. 6 corresponds to (c) in fig. 1, and (b) in fig. 6 corresponds to (d) in fig. 1.

Fig. 7 (a) is a cross-sectional view of the decorative sheet used for manufacturing the decorative glass panel shown in fig. 3, and fig. 7 (b) and (c) are schematic views showing the manufacturing process of the decorative glass panel shown in fig. 3.

Detailed Description

Next, embodiments of the invention will be described with reference to the drawings.

Referring to fig. 1 (a) to 1 (d), a decorative glass panel 10 according to a first embodiment of the present invention has a rectangular shape having four corners in a plan view, the decorative glass panel 10 including a flat plate-shaped planar portion and a rising portion that is bent from a peripheral edge of the planar portion to an R-corner shape over the entire periphery and rises to a bottom surface side at the same height.

The decorative glass panel 10 includes a glass substrate 15, an adhesive layer 11 formed on the glass substrate 15, an uneven pattern layer 12 formed on the adhesive layer 11, and a metal deposition layer 13 formed on the uneven pattern layer 12. A portion of the glass substrate 15 that is a portion of the back surface of the glass substrate 15 and that is bent from the flat portion 30 to the rising portion 31 is a curved surface 32. The uneven pattern layer 12 has an uneven pattern formed by concave portions 40 and convex portions 41 on the surface on the metal deposition layer 13 side as the upper surface thereof. The decorative glass panel 10 is applied to, for example, a housing of a mobile terminal.

As the glass substrate 15, for example, tempered glass, sapphire glass, zirconia glass, soda glass, borosilicate glass can be used. The thickness of the glass substrate 15 is preferably 100 to 1000 μm. If the thickness is 100 μm or more, the glass substrate 15 has sufficient strength, and if the thickness is 1000 μm or less, the decorative glass panel 10 becomes heavy to be easily carried.

The concave-convex pattern layer 12 is a layer that represents a three-dimensional design. Examples of the material include polyester resin, urethane resin, epoxy resin, acrylic/vinyl resin, acrylic resin, vinyl resin, and melamine resin. The overall thickness of the uneven pattern layer 12 is preferably 1 μm to 50 μm. If the thickness of the uneven pattern layer 12 is 1 μm or more, the thickness is sufficient for forming an uneven pattern. On the other hand, when the thickness of the uneven pattern layer 12 is 50 μm or less, the metal deposition layer 13 formed on the uneven pattern layer 12 is easily visible from the front surface side of the glass substrate 15. The height of the uneven pattern represented by the height from the lowermost surface of the recessed portion 40 to the uppermost surface of the projecting portion 41 may be selected to be not more than the thickness of the uneven pattern layer 12 within the range of 0.1 to 20 μm. When the height of the uneven pattern is 0.1 μm or more, the metallic design of the decorative glass panel 10 can be three-dimensionally expressed by the combination with the metal deposition layer 13. On the other hand, if the height of the uneven pattern is 20 μm or less, the generation of vapor deposition defects such as cracks can be suppressed. The uneven pattern layer 12 can be formed on the glass substrate 15 by, for example, a transfer method using the decorative sheet 50.

Referring to fig. 2 to 4, examples of the shape of the concave-convex pattern formed on the concave-convex pattern layer 12 are shown. Examples of the uneven pattern include an uneven pattern in which a plurality of linear uneven patterns, or concave portions 40 or convex portions 41 having a polygonal shape, a circular shape, or an elliptical shape in plan view are arranged on a plane. Referring to fig. 2, the linear uneven pattern may be an uneven pattern in which a plurality of linear recessed portions 40 and a plurality of linear raised portions 41 are periodically arranged in parallel with each other and have a waveform in cross section. For example, referring to fig. 2 (a), the concave portion 40 and the convex portion 41 may have the same height and the same width, and referring to fig. 2 (b), the concave portion 40 and the convex portion 41 may have different heights and different widths. Further, referring to fig. 3, the concave portions 40 having a regular hexagonal shape in a plan view of the concave portions 40 may be arranged in a honeycomb structure, and referring to fig. 4, the concave portions 40 having a circular shape in a plan view may be arranged in a lattice shape without gaps. The shape of the recessed portion 40 or the raised portion 41 in plan view is not limited to a regular hexagonal shape or a circular shape, and may be a polygonal shape such as a triangular shape or a quadrangular shape, or an elliptical shape. In this way, in the concave-convex pattern formed by the concave portions 40 or the convex portions 41 having a polygonal shape, a circular shape, or an elliptical shape in a plan view, the concave portions 40 or the convex portions 41 may be arranged closely and periodically on a plane.

The metal deposition layer 13 is a layer that expresses the design of the metal. Examples of the material include metals such as aluminum and tin, and oxides such as silicon dioxide, titanium oxide, and zirconium dioxide. These materials may be used alone or as a plurality of layers formed by stacking two or more kinds of them. When two or more kinds of layers are stacked to form a plurality of layers, it is preferable to stack a plurality of layers having different refractive indices. Further, it is more preferable that the layers adjacent in the stacking direction are stacked so that the refractive indices thereof are different. That is, when a layer having a refractive index a and a layer having a refractive index B are used, they can be stacked as AB, BA, ABA. In addition, when two layers each having a refractive index a and B are used, it is more preferable to stack the layers such that the refractive indices of the layers adjacent to each other in the stacking direction are different from each other, like ABAB. In the case of stacking in the order of ABAB, light is refracted and reflected between all layers between AB, between BA, and between AB, and thus interference of light is generated by more light. Therefore, when the metal deposition layer 13 is observed, a glossy feeling of rainbow patterns with higher design can be obtained. In addition, when a layer having a refractive index of C is used in addition to the layers having a refractive index of a and B, the layers may be stacked in order like ABCABC, or may not be stacked in order like ABCBA. As a practical example, titanium oxide and silica having different refractive indexes are used as the metal deposition layer 13, and 5 layers of titanium oxide, silica, and titanium oxide are stacked in this order. With such a configuration, light is reflected between all the layers due to the difference in refractive index between the adjacent layers, and light interference occurs between the reflected light. Therefore, when the metal deposition layer 13 is observed, the rainbow-like pattern is perceived as glossy, and the design is improved.

In addition, the design can be changed by changing the thickness of one or more layers among the plurality of layers. For example, in the case where the thickness of the layer closest to the concave-convex pattern layer 12 is d1nm and the case of d2nm, even if the same position of the metal deposition layer 13 is viewed from the same angle, the colors seen in the case of d1nm and the case of d2nm are different, and thus the design can be changed.

The overall thickness of the metal deposition layer 13 is preferably 10nm to 2 μm. When the thickness is 10nm or more, a sufficient metallic luster can be obtained as a metallic design. On the other hand, if the thickness is 2 μm or less, the occurrence of vapor deposition defects such as cracks can be suppressed. The metal deposition layer 13 may be formed on the uneven pattern layer 12 by, for example, a vacuum deposition method, a sputtering method, or an ion plating method.

The adhesive layer 11 is a layer having a function of improving adhesion between the glass substrate 15 and the uneven pattern layer 12. As the material, any material may be used as long as it can be adhered to the glass substrate 15, and for example, polyester-based resin, epoxy resin, vinyl chloride-based resin, acrylic resin, fluorine-based resin, or urethane-based resin may be used. In particular, when the adhesive layer 11 is made of a polyester resin, the glass substrate 15 and the uneven pattern layer 12 can be more firmly adhered to each other. The thickness of the adhesive layer 11 is preferably 0.1 to 5 μm. When the thickness of the adhesive layer 11 is 0.1 μm or more, the adhesion is sufficient for bonding the glass substrate 15 and the uneven pattern layer 12. On the other hand, when the thickness of the adhesive layer 11 is 5 μm or less, the glass substrate 15 and the uneven pattern layer 12 can be adhered to each other while maintaining good visibility from the surface side of the glass substrate 15. In addition, the adhesive layer 11 can be formed on the glass substrate 15 by a transfer method using the decorative sheet 50.

Referring to fig. 5 (a), the decorative sheet 50 used in the first embodiment of the present invention includes a release layer 20, a concave-convex pattern layer 12 formed on the release layer 20, and an adhesive layer 11 formed on the concave-convex pattern layer 12 on a base sheet 21. The concave-convex pattern layer 12 has a concave-convex pattern on the surface on the side of the release layer 20 as the lower surface.

Examples of the material of the base sheet 21 include polyethylene terephthalate (PET), acrylic, polycarbonate, polypropylene (PP), resin sheets such as olefin, and cellulose sheets such as glassine paper, coated paper, and cellulophenol. The thickness of the base sheet 21 is preferably 12 μm to 100 μm. The base sheet 21 has a thickness of 12 μm or more, which is excellent in handling properties, and a thickness of 100 μm or less, which is appropriate in rigidity, and thus has good handling properties.

The release layer 20 is a layer for improving the releasability of the uneven pattern layer 12 from the base sheet 21 when the decorative sheet 50 is used to transfer the adhesive layer 11 and the uneven pattern layer 12 to the glass substrate 15, and the release layer 20 remains on the base sheet 21 even after the transfer. Examples of the material include melamine-based resins, silicone-based resins, fluorine-based resins, epoxy-based resins, urea-based resins, urethane-based resins, polyester-based resins, and phenol-based resins. The thickness of the release layer 20 is preferably 0.1 to 20 μm. When the thickness of the release layer 20 is 0.1 μm or more, the coating can be easily performed on the substrate sheet. On the other hand, if the thickness of the release layer 20 is 20 μm or less, the occurrence of cracks in the release layer 20 can be suppressed when the decorative sheet 50 is stuck to the glass base material 15. The method of forming the release layer 20 on the base sheet 21 can be performed by the same method as the conventional method. Examples of conventional layer forming methods include coating methods such as a gravure coating method, a roll coating method, and a comma coating method, and printing methods such as a gravure printing method and a screen printing method.

The uneven pattern layer 12 is formed on the release layer 20 by a conventional layer forming method, similarly to the formation of the release layer 20.

The adhesive layer 11 is formed on the uneven pattern layer 12 by a conventional layer forming method, similarly to the formation of the release layer 20.

Next, a method for manufacturing the decorative glass panel 10 manufactured using the decorative sheet 50 shown in fig. 5 (a) will be described.

First, a glass substrate 15 having a flat surface portion at the center and an upright portion that is bent and erected from the peripheral edge of the flat surface portion to the bottom surface side over the entire circumference is prepared by cutting, polishing, press forming, or the like of a glass plate. The bent portion becomes a curved surface. Next, the decorative sheet 50 is prepared. First, a melamine resin was applied as a release layer 20 on a base sheet 21 in a thickness of 0.5 μm by a coating method. Next, in order to form the concave-convex pattern layer 12 having the concave-convex pattern, a concave-convex pattern opposite to the concave-convex pattern layer 12 is formed on the releasing layer 20. Here, the uneven pattern opposite to the uneven pattern layer 12 means that the concave portions 40 and the convex portions 41 of the uneven pattern layer 12 correspond to the convex portions and the concave portions thereof, respectively. First, a mold having the same uneven pattern as the uneven pattern layer 12 is laminated on the release layer 20 so that the surface having the uneven pattern is the release layer 20 side. Next, by pressing the mold from the opposite side of the release layer 20, an uneven pattern opposite to the uneven pattern layer 12 is formed on the release layer 20. Next, as the uneven pattern layer 12, a polyester resin was coated on the release layer 20 having an uneven pattern in a thickness of 15 μm by a coating method, and the polyester resin was laminated on the uneven pattern of the release layer 20, thereby forming an uneven pattern on the surface of the release layer 20 side which is the lower surface of the uneven pattern layer 12. Next, a polyester resin was applied to the uneven pattern layer 12 in a thickness of 0.3 μm as the adhesive layer 11 by a coating method, thereby forming the decorative sheet 50. Next, the glass substrate 15 is transferred with the decorative sheet 50 to the uneven pattern layer 12. Referring to fig. 5 (b), the surface on the side of the adhesive layer 11 is superimposed on the back surface of the glass substrate 15 so that the back surface of the glass substrate 15 faces the uneven pattern layer 12 of the decorative sheet 50. Next, the decorative sheet 50 is bonded to the glass substrate 15 by applying heat and pressure from the base sheet 21 side of the decorative sheet 50 through a heat-resistant rubber-like elastic material such as silicone rubber, via which the temperature is set to about 80 to 260 ℃ and the pressure is set to about 50 to 2000 Pa. Subsequently, the adhered decorative sheet 50 is cooled to room temperature. Next, referring to fig. 5 (c), the release layer 20 and the uneven pattern layer 12 are peeled off from each other, whereby the uneven pattern layer 12 is transferred onto the glass substrate 15. Next, the metal deposition layer 13 is formed on the uneven pattern layer 12. Referring to fig. 5 (d), five layers of titanium oxide having a film thickness of 80 nm, silicon dioxide having a film thickness of 170nm, titanium oxide having a film thickness of 40nm, silicon dioxide having a film thickness of 170nm, and titanium oxide having a film thickness of 40nm were sequentially deposited on the uneven pattern layer 12 by a vacuum deposition method to form a metal deposition layer 13, thereby manufacturing the decorative glass panel 10 shown in fig. 1.

As is clear from the above, since the metal deposition layer 13 is formed on the decorative glass panel 10 manufactured as described above through the uneven pattern layer 12 formed on the curved surface 32 of the glass substrate 15 by transfer printing, the decorative glass panel 10 having a three-dimensional metallic design in which the metal deposition layer 13 is reliably fixed to the curved surface 32 of the glass substrate 15 while preventing metal cracks is obtained.

Next, a second embodiment of the present invention will be described focusing on differences from the previous embodiments with reference to the drawings.

The decorative glass panel 10 according to the second embodiment of the present invention has the same plan view shape as the first embodiment shown in fig. 1 (a) and (b). Referring to fig. 6 (a) and (b), the adhesive layer 11 and the uneven pattern layer 12 are formed on the glass substrate 15 having a curved surface at a portion of the back surface, and the metal deposition layer 13 is formed through the uneven pattern layer 12 in the same manner as the first embodiment. On the other hand, the difference is that the glass base material 15 does not have a flat surface portion and the base sheet 21 is included between the adhesive layer 11 and the uneven pattern layer 12. The glass substrate 15 has a shape in which the entire front and back surfaces are gently curved surfaces 32 having the highest central portion and bulging toward the front surface side.

As the glass substrate 15, the same material as that of the first embodiment of the present invention can be used.

The concave-convex pattern layer 12 is a layer that represents a three-dimensional design. As the material, the same material as that of the first embodiment of the present invention can be used. The concave-convex pattern layer 12 can be formed on the glass substrate 15 by a lamination method using the decorative sheet 50, for example.

The metal deposition layer 13 is a layer that expresses the design of the metal. As the material, the same material as that of the first embodiment of the present invention can be used. The metal deposition layer 13 may be formed on the uneven pattern layer 12 by, for example, a vacuum deposition method, a sputtering method, or an ion plating method.

The base sheet 21 is a layer for decorating the glass substrate 15. As the material, the same material as that of the first embodiment of the present invention may be used, and when the decorative glass panel 10 is intended to be colored, the base sheet 21 having a predetermined color may be used. The base sheet 21 can be formed on the glass substrate 15 by a lamination method using the decorative sheet 50, for example.

The adhesive layer 11 is a layer having a function of improving the adhesion between the glass base material 15 and the base sheet 21. As the material, the same material as that of the first embodiment of the present invention can be used. The adhesive layer 11 may be formed on the glass substrate 15 by a lamination method using the decorative sheet 50.

Referring to fig. 7 (a), the decorative sheet 50 used in the second embodiment of the present invention has the uneven pattern layer 12 formed on one surface of the base sheet 21 and the adhesive layer 11 formed on the other surface. The uneven pattern layer 12 has an uneven pattern on the surface opposite to the base sheet 21.

The uneven pattern layer 12 and the adhesive layer 11 are formed on the base sheet 21 by a conventional layer forming method.

Next, a method for manufacturing the decorative glass panel 10 manufactured using the decorative sheet 50 shown in fig. 7 (a) will be described.

First, a glass substrate 15 having a gently curved surface shape with the highest central portion and bulging toward the front surface side is prepared over the entire front and back surfaces by cutting, polishing, press forming, or the like of a glass plate. Next, the decorative sheet 50 is prepared. First, a polyester resin was applied as the uneven pattern layer 12 on the base sheet 21 in a thickness of 15 μm by a coating method. Next, a mold having an uneven pattern opposite to the uneven pattern layer 12 is laminated such that the surface having the uneven pattern is on the uneven pattern layer 12 side. Next, by pressing the mold from the side opposite to the release layer 20, an uneven pattern is formed on the surface of the uneven pattern layer 12 opposite to the base sheet 21. Next, a polyester resin was applied as the adhesive layer 11 to the other surface of the base sheet 21 on which the uneven pattern layer 12 was not formed, in a thickness of 0.3 μm by an application method, thereby forming the decorative sheet 50. Next, the decorative sheet 50 is laminated on the glass substrate 15, and the uneven pattern layer 12 is formed on the glass substrate 15. Referring to fig. 7 (b), the surface on the side of the adhesive layer 11 is superimposed on the back surface of the glass substrate 15 so that the back surface of the glass substrate 15 faces the base sheet 21 of the decorative sheet 50. Next, the decorative sheet 50 is bonded to the glass substrate 15 by applying heat and pressure from the base sheet 21 side of the decorative sheet 50 through a heat-resistant rubber-like elastic material such as silicone rubber, via which the temperature is set to about 80 to 260 ℃ and the pressure is set to about 50 to 2000 Pa. Next, the metal deposition layer 13 is formed. Referring to fig. 7 (c), five layers of titanium oxide having a film thickness of 80 nm, silicon dioxide having a film thickness of 170nm, titanium oxide having a film thickness of 40nm, silicon dioxide having a film thickness of 170nm, and titanium oxide having a film thickness of 40nm were sequentially deposited on the uneven pattern layer 12 by a vacuum deposition method to form a metal deposition layer 13, and the decorative glass panel 10 shown in fig. 3 was manufactured.

As is clear from the above, since the metal deposition layer 13 is formed on the decorative glass panel 10 manufactured as described above through the uneven pattern layer 12 formed on the curved surface 32 of the glass substrate 15 by lamination, the decorative glass panel 10 having a three-dimensional metallic design in which the metal deposition layer 13 is reliably fixed to the curved surface 32 of the glass substrate 15 while preventing metal cracks is obtained.

In each of the above embodiments of the present invention, the adhesive layer 11 is provided on the decorative sheet 50, but when the glass substrate 15 is well adhered to the uneven pattern layer 12 or the base sheet 21, the uneven pattern layer 12 or the base sheet 21 may be directly provided on the glass substrate 15 without providing the adhesive layer 11.

In each of the above embodiments of the present invention, the uneven pattern layer 12 is formed on the entire surface of the base sheet 21, but it is not necessarily formed on the entire surface as long as it is formed at a position corresponding to the portion of the glass base material 15 where the metal deposition layer 13 is formed.

Further, in each of the above embodiments of the present invention, a mold having an uneven pattern is used to form the uneven pattern on the uneven pattern layer 12, but as long as the uneven pattern can be formed, a method such as chemical etching or sandblasting may be used.

Further, in each of the above embodiments of the present invention, the metal deposition layer 13 is formed by using titanium oxide and silicon dioxide in a five-layer structure, but the metal deposition layer 13 may be formed by a plurality of layers or a single layer other than the five-layer structure as long as a deposition design is formed on the glass substrate 15.

Further, in the first embodiment of the present invention, the release layer 20 is provided on the decorative sheet 50, but when the base sheet 21 and the uneven pattern layer 12 are well peeled off, the uneven pattern layer 12 may be directly provided on the base sheet 21 without providing the release layer 20.

Further, in the first embodiment of the present invention, a part of the glass substrate 15 is the curved surface 32, but the entire back surface of the glass substrate 15 may be a curved surface. The surface of the glass substrate 15 may be flat or curved.

Further, in the second embodiment of the present invention, the entire front and back surfaces of the glass substrate 15 are the curved surfaces 32 having the highest central portion and gently bulging toward the front surface side, but only a part of the back surface of the glass substrate 15 may be curved. The surface of the glass substrate 15 may be flat or curved.

Description of the reference numerals

10 decorative glass panel

11 adhesive layer

12 concave-convex pattern layer

13 metal vapor deposition layer

15 glass substrate

21 base sheet

50 decorative sheet