Laminated glass

Abstract

To provide laminated glass with aesthetic appeal through simple and inexpensive means. [Solution] A laminated glass in which an adhesive interlayer 2 is sandwiched between a pair of glass plates 1, characterized in that a defect 2a is provided in the adhesive interlayer.

Description

Technical Field

[0001] The present invention relates to laminated glass having a design.

Background Art

[0002] Conventionally, laminated glass in which an adhesive intermediate film is sandwiched between a pair of glass plates and the two glass plates are joined and adhered is known. Regarding such laminated glass, in Patent Document 1, the adhesive intermediate film is provided with a pattern to give the laminated glass a design.

[0003] Specifically, a large number of intermediate film pieces pre-colored in a predetermined color are prepared, and these intermediate film pieces are pattern-pasted to form a single adhesive intermediate film. Alternatively, fibers or particles are pushed in from both surfaces of a pre-formed adhesive intermediate film. The thus formed patterned adhesive intermediate film is sandwiched between a pair of glass plates to form laminated glass.

[0004] In this way, the pattern imparted to the adhesive intermediate film will be directly reflected in the laminated glass. Therefore, it is possible to impart a desired design to the laminated glass while maintaining mechanical strength and safety without performing any processing on the glass plates.

Prior Art Documents

Patent Documents

[0005] [

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the method of Patent Document 1, the production and processing of the adhesive intermediate film, such as pattern-pasting the intermediate film pieces or pushing in fibers or particles, are complicated and the workability is poor. In addition, in order to form a patterned adhesive intermediate film, it is necessary to prepare various materials, which causes problems in terms of economy.

[0007] This invention was made in view of the above problems, and its main objective is to provide laminated glass with a design feature by a simple and inexpensive means. [Means for solving the problem]

[0008] To achieve this objective, the laminated glass of the present invention is a laminated glass having an adhesive interlayer sandwiched between a pair of glass plates, characterized in that a defect is provided in the adhesive interlayer.

[0009] The laminated glass of the present invention is characterized in that a plurality of adhesive interlayers are sandwiched between them, and the defective portions of each adhesive interlayer are arranged to overlap.

[0010] The laminated glass of the present invention is characterized in that a plurality of adhesive interlayers are sandwiched between them, and the defects in each of the adhesive interlayers are provided at staggered positions.

[0011] The laminated glass of the present invention is characterized in that the adhesive interlayer film is sandwiched in pairs, and a base sheet is provided between the pairs of adhesive interlayer films.

[0012] The laminated glass of the present invention is characterized in that the base sheet is a PET film.

[0013] According to the laminated glass of the present invention, a composite glass plate manufactured by sandwiching an adhesive interlayer having defects between a pair of glass plates exhibits the presence or absence of haze (cloudiness), as well as a sense of three-dimensionality and depth due to light reflection and shading, between the region where the adhesive interlayer is located and the region where the defects are located. This, combined with the pattern based on the shape of the defects, makes it possible to create a unique texture.

[0014] Furthermore, by using multiple adhesive interlayers and irregularly positioning the defects in each, it is possible to generate complex textures based on the intensity of haze (cloudiness) in the areas where the adhesive interlayers overlap and in the areas where the adhesive interlayers overlap with the defects. Therefore, it becomes possible to achieve a wider variety of design possibilities.

[0015] Furthermore, by providing a pair of adhesive interlayers and using a base sheet such as a PET film between them, the PET film appearing in the overlapping areas of the defects may deform into a concave shape during processing. As a result, in the laminated glass, a phenomenon occurs where the reflected image is inverted vertically and horizontally, like a concave mirror, in the area where the defects are located. In addition, multiple reflective surfaces are formed by the reflection of the glass plate and the reflection of the PET film, making it possible to create complex designs in laminated glass.

[0016] Thus, by simply creating defects in the adhesive interlayer, it becomes possible to impart complex and diverse design elements to laminated glass while maintaining mechanical strength and safety. Therefore, when used in large openings such as windows, doors, and curtain walls in buildings, it becomes possible to impart patterns and various textures based on the defects. [Effects of the Invention]

[0017] According to the laminated glass of the present invention, by simply processing the adhesive interlayer to create a defect, it becomes possible to impart complex and diverse design features to the laminated glass while maintaining mechanical strength and safety. [Brief explanation of the drawing]

[0018] [Figure 1] This figure shows laminated glass in which a defect is provided in the adhesive interlayer according to an embodiment of the present invention (First Embodiment). [Figure 2] This figure shows laminated glass in which a defect is provided in the adhesive interlayer according to an embodiment of the present invention (second embodiment). [Figure 3]A diagram showing a laminated glass provided with a defective part in the intermediate film for adhesion in an embodiment of the present invention (Example 3). [Figure 4] A diagram showing a laminated glass provided with a defective part in the intermediate film for adhesion in an embodiment of the present invention (Example 4).

Embodiments for Carrying Out the Invention

[0019] The present invention manufactures a laminated glass having a design property by using an intermediate film for adhesion provided with a defective part. Details of the laminated glass will be described below with reference to FIGS. 1 to 4.

[0020] ≪≪Laminated Glass: Example 1≫≫ As shown in FIG. 1(a), the laminated glass 10 includes a pair of glass plates 1 and a pair of intermediate films 2 for adhesion provided with defective parts 2a. In the first embodiment, the case where the same intermediate film for adhesion is adopted for the pair of intermediate films 2 is cited as an example.

[0021] ≪Glass Plate≫ The glass plate 1 can adopt any glass material according to the use. For example, float glass, wired glass, lined glass, colored glass, tempered glass, heat ray reflecting glass, heat ray absorbing glass, etc. can be exemplified.

[0022] Also, the paired glass plates 1 may adopt the same type of glass material, or may adopt a combination of different glass materials. Further, the glass materials having the same thickness may be adopted, or a combination of glass materials having different thicknesses may be used.

[0023] ≪Intermediate Film for Adhesion≫ Each of the pair of adhesive interlayers 2 has multiple defects 2a of different sizes, and they are arranged in pairs, sandwiched between the pair of glass plates 1. Any material commonly used as an interlayer in laminated glass can be used for the interlayer. For example, a thermoplastic resin composition mainly composed of thermoplastic resin can be used.

[0024] Examples of such materials include polyvinyl acetal resins (PVB, etc.), polyvinyl chloride resins (PVC), saturated polyester resins, ethylene-vinyl acetate copolymer resins (EVA, etc.), ethylene-ethyl acrylate copolymer resins, ionic interlayers (SGP), and cycloolefin polymers (COP).

[0025] In this embodiment, an EVA sheet mainly composed of an ethylene-vinyl acetate copolymer resin is used, which has a lower melting temperature compared to the above-mentioned PVB and SGP, has excellent fluidity, and is known to blend well with other materials.

[0026] The example given for the missing portion 2a is a case where a round hole is used and is irregularly provided on the entire surface of each of the pair of adhesive interlayer films 2. There are no restrictions on its diameter or position, and it may also be provided regularly. Furthermore, it may be provided uniformly on the entire surface, only on the upper half, only on the lower half, or along the edge to form a frame, and any of these forms are acceptable. Its shape is not limited to a round hole, but may be formed into an elliptical hole, a rectangular hole, a star-shaped hole, or any other shape.

[0027] Both of the pair of adhesive interlayer films 2 have a defect 2a consisting of a circular hole of the same diameter at the same position. Therefore, when these are stacked to form laminated glass 10, as shown in Figure 1(b), an overlapping region 10a of the defect 2a and a region 10b where the two adhesive interlayer films 2 overlap are formed. The overlapping region 10a of the defect 2a is simply a configuration where two glass plates 1 are stacked, resulting in a clear state without haze (cloudiness). In addition, refraction occurs due to the front and back surfaces of the four surfaces of the two glass plates 1.

[0028] In this way, the laminated glass 10 contains a mixture of overlapping regions 10a of the defective portion 2a and regions 10b where two adhesive interlayer films 2 overlap. As a result, the laminated glass 10, while transparent, exhibits characteristics such as the presence or absence of haze, light reflection, and shadows that create a sense of three-dimensionality and depth, thus forming a unique texture.

[0029] <<Laminated Glass: Second Example>> As shown in Figure 2(a), the laminated glass 10 comprises a pair of glass plates 1 and a pair of adhesive interlayers 2 having a defect 2a. In the second embodiment, an example is given in which the position of the defect 2a differs in the first and second adhesive interlayers 21 and 22 that constitute the pair of adhesive interlayers 2.

[0030] The pair of glass plates 1 and adhesive interlayers 2 shown in Figure 2(a) are the same as in the first embodiment, but the first and second adhesive interlayers 21 and 22 constituting the pair of adhesive interlayers 2 differ in the position, size, and number of defects 2a. As a result, as shown in Figure 2(b), the laminated glass 10 has overlapping areas 10a of defects 2a, areas 10b where two adhesive interlayers 2 overlap, and areas 10c where only one adhesive interlayer 2 is present.

[0031] The haze value differs between the region 10b where two adhesive interlayers 2 overlap and the region 10c where only one adhesive interlayer 2 is present. This allows the laminated glass 10 to have not only the presence or absence of haze, but also complex textures based on the strength of the haze. Therefore, it is possible to achieve a wider variety of design possibilities compared to the laminated glass 10 of the first embodiment.

[0032] <<Laminated Glass: Third Example>> As shown in Figure 3(a), the laminated glass 10 comprises a pair of glass plates 1 and a pair of adhesive interlayers 2 having a defect portion 2a.

[0033] Although the glass plate 1 and adhesive interlayer 2 shown in Figure 3(a) can be made of the same materials as in the first embodiment, the first and second adhesive interlayers 21 and 22 that constitute the pair of adhesive interlayers 2 differ not only in the position, size, and number of defects 2a, but also in their color.

[0034] As a result, the laminated glass 10 has the following areas formed, as shown in Figure 3(b): an overlapping area 10a of the defective portion 2a, an overlapping area 10b of the two adhesive interlayers 2, an area 10d consisting only of the first adhesive interlayer 21, and an area 10e consisting only of the second adhesive interlayer 22. Therefore, unlike the first and second embodiments, it is possible to create a complex texture on the laminated glass 10 due to the three different haze values.

[0035] <<Laminated glass: Fourth embodiment>> As shown in Figure 4(a), the laminated glass 10 comprises a pair of glass plates 1, a pair of adhesive interlayer films 2 having a defect portion 2a, and a base sheet 3.

[0036] In the fourth embodiment, both the pair of glass plates 1 and the pair of adhesive interlayers 2 use the same materials as in the first embodiment, and the pair of adhesive interlayers 2 are provided with a defect 2a consisting of a circular hole of the same diameter at the same position.

[0037] ≪Base Sheet≫ The base sheet 3 can be any sheet material, such as cloth, Japanese paper, wood sheets, metal foils like aluminum or stainless steel, or resin films.

[0038] The resin film is, for example, made by molding polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polymethyl methacrylate, polyethersulfone, nylon, polyacrylate, cycloolefin polymer, etc., into a film shape.

[0039] In this embodiment, the base sheet 3 is a so-called PET film, which is made by stretching and molding polyethylene terephthalate, a resin film known for its excellent heat resistance and high transparency. Here, a colorless and transparent PET film is used.

[0040] When these are stacked together to form laminated glass 10, as shown in Figure 4(b), an overlapping region 10a of the defective portion 2a and a region 10b where two adhesive interlayer films 2 overlap are formed. In the overlapping region 10a of the defective portion 2a, only the base sheet 3 is visible between the two glass plates 1. At this time, the base sheet 3 in the overlapping region 10a of the defective portion 2a may deform into a concave shape during the laminated glass processing because there is no adhesive interlayer film 2 present.

[0041] As a result, when a transparent PET film is used for the base sheet 3, light is reflected off the surface of the PET film, causing a phenomenon where the reflected image is inverted horizontally and vertically, similar to the reflection of a concave mirror (like the reflection of the concave part of a metal spoon). In addition, multiple reflective surfaces are formed by the reflection of the PET film and the reflection of the glass plate 1.

[0042] Furthermore, because the PET film undergoes some distortion during the laminated glass processing, even in the region 10a where two adhesive interlayers 2 overlap, the surface reflection of the glass plate 1 can form a different texture compared to the case where no PET film is provided. Therefore, a complex design can be imparted to the laminated glass 10.

[0043] As described above, the laminated glass 10 of the present invention allows for the provision of defects 2a in the adhesive interlayer 2, thereby enabling the addition of complex and diverse design features while maintaining the mechanical strength and safety of the laminated glass 10. Therefore, when used in large openings such as windows, doors, and curtain walls found in buildings, it becomes possible to impart various patterns and textures to these elements due to the defects 2a.

[0044] Furthermore, any means are used to create the defect 2a in the adhesive interlayer 2, and the method for manufacturing the laminated glass 10 only requires the addition of the step of creating the defect 2a in the adhesive interlayer 2, allowing the use of conventionally implemented equipment and methods. Therefore, it is possible to manufacture laminated glass 10 with aesthetic appeal using simple and inexpensive means.

[0045] The above embodiments are provided to facilitate understanding of the present invention and are not intended to limit its interpretation. The present invention can be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

[0046] For example, in this embodiment, two adhesive interlayers 2 are sandwiched between a pair of glass plates 1, but the invention is not limited to this. A configuration in which only one adhesive interlayer 2 with a defect 2a is sandwiched may also be used. Furthermore, a configuration in which multiple layers of base sheet 3 and adhesive interlayers 2 are stacked alternately may also be used.

[0047] Furthermore, the adhesive interlayer 2 may be colorless and transparent, or it may be colored. In addition, if multiple adhesive interlayers 2 are used, they may be made of different materials, or interlayers of the same material but with different thicknesses may be used. Moreover, they may be made of the same color but with different shades or different tones. The base sheet 3 may also be colorless and transparent, or it may be colored or have a pattern applied to it. [Explanation of Symbols]

[0048] 10 Laminated glass 10a Overlapping area of ​​the defect 10b Region where two adhesive interlayers overlap 10c Adhesive interlayer in one area 10d Region containing only the first adhesive interlayer 10e Region containing only the second adhesive interlayer 1 glass plate 2 Adhesive interlayer film 21 First adhesive interlayer 22 Second adhesive interlayer 2a Defect 3. Base sheet

Claims

1. Laminated glass in which an adhesive interlayer is sandwiched between a pair of glass plates, Laminated glass characterized in that a defect is provided in the adhesive interlayer.

2. In the laminated glass according to claim 1, The aforementioned adhesive interlayer film is sandwiched in multiple layers, Laminated glass characterized in that the defective portions of each of the adhesive interlayers are arranged to overlap.

3. In the laminated glass according to claim 1, The aforementioned adhesive interlayer film is sandwiched in multiple layers, Laminated glass characterized in that the defects in each of the adhesive interlayers are provided at staggered positions.

4. In the laminated glass according to claim 2 or 3, The aforementioned adhesive interlayers are sandwiched in pairs, Laminated glass characterized by having a base sheet provided between a pair of adhesive interlayer films.

5. In the laminated glass according to claim 4, Laminated glass characterized in that the base sheet is a PET film.

Images