JP4170813B2 - Glass panel and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a glass panel suitable for use as a building material or the like.
[0002]
[Prior art]
Japanese Patent Publication No. 55-29018 discloses a glass article in which a plurality of glass grains are heated and softened and fused, and the outer peripheral portion of the glass grains is needle-like β-wollastonite crystals. This uses a granulated material, a granule, a small sphere, a small piece, and a mulled stick formed from a glass obtained by melting a batch of a special blend that is likely to produce crystals of β-wollastonite as glass particles. The heating temperature is maintained at about 1150 ° C. for about 5 minutes.
[0003]
Japanese Patent Application Laid-Open No. 6-72741 discloses a crystallized glass material in which a plurality of glass particles are heated and softened and fused, and the outer peripheral portion of the glass particles is a crystal made of Na ₂ O.2CaO.3SiO _2. ing. This uses glass grains formed from a molten glass of a batch having a special composition that is likely to produce crystals of Na ₂ O · 2CaO · 3SiO ₂ . The heating temperature is 800-950 ° C.
[0004]
[Problems to be solved by the invention]
The above-mentioned conventional techniques relate to glass materials having natural stone-like aesthetics, and all of them form glass grains from glass obtained by melting a batch of a special blend and use them as raw materials. Therefore, considerable energy, labor, and cost are required to obtain the raw material glass particles.
[0005]
On the other hand, a large amount of soda-lime glass represented by glass bottles is currently on the market, and reuse as a resource is an issue. Therefore, the present invention uses a glass cullet obtained by crushing these discarded soda-lime glass, and develops a technology for recycling as a glass panel having a light-transmitting and geometric pattern. That was the issue.
[0006]
[Means for Solving the Problems]
In the invention of claim 1 of the present application, the first layer is formed with soda-lime glass cullet , and the second layer is formed with amorphous glass grains having a composition that does not crystallize at 880 ° C. to 960 ° C. The cullet or glass particles are softened and fused by heating at 960 ° C. to 960 ° C. for 1 to 2 hours. At least a part of the cullet of the first layer is crystallized in the outer peripheral portion and the inside is not The glass panel is characterized in that it is crystalline and the glass particles of the second layer are non-crystalline .
[0007]
In the invention of claim 2 of the present application, the first layer is formed by soda-lime glass cullet, and the second layer is formed by non-crystalline glass grains having a composition that does not crystallize at 880 ° C. to 960 ° C. and soda-lime glass cullet. Then, this is heated at 880 ° C. to 960 ° C. for 1 to 2 hours to soften and melt the cullet or glass particles, and at least a part of the cullet of the first layer has an outer peripheral portion. The glass panel is characterized by being crystallized and non-crystalline inside, and the non-crystalline glass grains of the second layer being non-crystalline.
[000 8 ]
A soda-lime glass cullet is melted by heating at 880 ° C. to 960 ° C. for 1 to 2 hours, and a smooth glass plate having a geometric pattern without bubbles is obtained. The composition of the majority of soda-lime glass bottles to be recovered from the market, Si0 ₂ is 70~73mass%, Na ₂ O is 12~14mass%, CaO is 10~12mass%, _Al 2 _{O 3} is 1.5-3 Since it is 0.0 mass%, the composition of soda-lime glass cullet is the same. Therefore, the glass panel of the present invention can use 100% soda lime glass cullet (glass cullet obtained by pulverizing discarded and collected soda lime glass) as a raw material glass grain, and easily and inexpensively produce a glass panel with excellent aesthetics. And contribute to glass recycling.
[000 9 ]
Crystals produced by the melting temperature of the composition of soda-lime glass is Debitoraito _{(Na 2 O · 3CaO · 6SiO} 2). This geometric pattern is due to the fact that devitrite is generated to the inside of about 0.5 mm from the cullet grain boundary and the milky white color is exhibited. Since the inside of the glass grain is transparent and amorphous, it has translucency. This glass panel has a unique stone-like texture and can be particularly useful as a building material. In addition, secondary uses such as polishing, cutting, adhesion, and heat deformation greatly expand the application. Moreover, a useful function can be added by performing a surface treatment.
[00 10 ]
880 degreeC-960 degreeC is suitable for the heat processing temperature of the glass grain in this invention. When the temperature is 880 ° C. or lower, (1) the melted glass has a high viscosity and sufficient fluidity cannot be obtained, so that a smooth surface cannot be obtained. (2) Since the glass particles are not completely welded together, a cavity is formed. When it is baked using (3) mold, which causes a decrease in strength, sharp projecting glass tends to remain around, causing problems in handling. (4) Insufficient generation of devitrite crystals, There is a disadvantage that a clear geometric pattern cannot be obtained. When the temperature is 960 ° C. or higher, the cullet is completely fused, and the interface that triggers crystal generation is lost, which causes a disadvantage that a geometric pattern cannot be formed.
[001 1 ]
As for the particle size of the glass grain of a cullet, it is desirable that the thing of 3-15 mm is 90 mass% or more. If the glass particles have a small particle size of 3 mm or less, the ratio of crystallization in the particles becomes high and white turbidity occurs. For this reason, transparency is lost, translucency is lowered, and a geometric pattern is not formed. When the size is larger than 15 mm, voids are easily generated between the glass grains. Further, since the glass cullet is composed of almost 15 mm or less glass particles, it is reasonable that the particle size of the glass particles is 3 to 15 mm from the viewpoint of using the glass cullet.
[001 2 ]
When different types of cullet are used in combination, it is possible to form a pattern utilizing the characteristics. The simplest and most effective design method is a method in which a colored cullet is mixed and fired based on flint glass (colorless and transparent glass) cullet. The flint glass is dotted with colored cullet, and by changing the particle size and addition rate of the colored cullet, a beautiful glass panel with various spots and translucency can be obtained. In particular, in the case of glass bottles, since many kinds of colored glass bottles are distributed in the market, it is desirable to use these cullet from the viewpoint of recycling.
[001 3 ]
When a glass panel needs to be thick (in terms of strength, etc.), if it is molded only with colored cullet, light absorption is large and sufficient translucency cannot be obtained. In this case, a colored panel with good translucency can be obtained by making the colored glass layer substantially thin by adopting a two-layer structure of flint glass + colored glass.
[0014]
When a glass that does not produce crystals at 880 ° C. to 960 ° C. is used in combination, only that portion has a high transparency and glossy glass, and a glass panel that exhibits a unique aesthetics can be obtained. However, an important point as a characteristic value of the glass used in combination is to approximate the expansion coefficient of soda-lime glass as much as possible. If the difference in expansion coefficient is large, tensile stress is generated at the particle welding interface, which causes cracks and breakage. Incidentally, many soda-lime glasses distributed in the market are about 85 × 10 ⁻⁷ cm / ° C.
[0015]
The state is different depending on which one is used. For example, if many soda-lime glass cullets are used, transparent irregular areas are formed in the milky white pattern. Conversely, if many non-crystalline glass cullets that are not crystallized are used, a milky white island is formed in the transparent glass. The pattern is dotted. In any case, it is attractive in terms of design, and the effect is enhanced by combination with colored glass.
[0016]
Flint soda / lime glass cullet is not crystallized in the first layer, and the non-crystallized colored glass cullet is not crystallized in the second layer. It becomes a glass panel having a two-layer structure of a second layer which is almost transparent. Since it has an amorphous layer, it is a glass panel that is remarkably excellent in light transmission, although it is thick and strong. In addition, since it has a unique aesthetic, diversification of design can be expected.
[0017]
The invention according to claim 3 of the present application includes a step of integrating soda-lime glass cullet as a first layer, and collecting non-crystalline glass grains having a composition that does not crystallize at 880 ° C. to 960 ° C. as a second layer. has a step of those integrated by heating for 1-2 hours at 880 ° C. 960 ° C. softening fusing the cullet or glass particles, and a step of slow cooling, at least a portion of cullet of said first layer The method for producing a glass panel is characterized in that the outer peripheral portion is crystallized and the inside is amorphous, and the glass particles of the second layer are amorphous . This is the manufacturing method of the glass panel of Claim 1.
[0018]
The invention according to claim 4 of the present application uses a soda-lime glass cullet as a first layer, and a mixture of non-crystalline glass grains and a soda-lime glass cullet having a composition that does not crystallize at 880 ° C. to 960 ° C. And the step of softening and fusing the cullet or glass grains by heating at 880 ° C. to 960 ° C. for 1 to 2 hours, and the step of slow cooling, At least a part of the cullet in one layer is crystallized in the outer peripheral portion and non-crystalline inside, and the non-crystalline glass grains in the second layer are non-crystalline. It is a manufacturing method of a glass panel. This is the manufacturing method of the glass panel of Claim 2.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
[Reference Example 1]
After applying a release agent to a ceramics sheath mold having an internal size of 100 × 100 × 20, 200 g of flint glass cullet (soda lime glass cullet) of 3 to 7 mm is put and leveled almost uniformly. The accumulated materials are put in a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. A translucent panel having a geometric pattern with a thickness of about 8 mm was obtained.
[0020]
[ Reference Example 2 ]
After applying a release agent to a ceramics sheath mold having an inner dimension of 450 × 450 × 20, 2025 g of flint glass cullet (soda lime glass cullet) of 3 to 7 mm is put and leveled almost uniformly. Furthermore, 2025 g of EG (emerald green) glass cullet (soda lime glass cullet) of the same particle size is put on it and leveled almost uniformly. The accumulated materials are put in a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. A translucent panel having a thickness of about 8 mm and an EG geometric pattern was obtained.
Incidentally, only EG (emerald green) glass cullet (4050 g) has a low transmittance and does not become a light-transmitting panel.
[0021]
[ Reference Example 3 ]
A release agent is applied to a ceramics sheath mold having an internal dimension of 100 × 100 × 20, and then 100 g of flint glass cullet (soda lime glass cullet) of 3 to 7 mm is added and leveled almost uniformly. Further, 100 g of glass particles (soda lime glass cullet) mixed at a ratio of flint glass: amber glass = 8: 2 of the same particle size is put on it and leveled almost uniformly. The accumulated materials are put in a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. A translucent panel with a geometric pattern having a brown spot pattern of about 8 mm thickness was obtained.
[0022]
Example 1
A release agent is applied to a ceramics sheath mold having an internal dimension of 100 × 100 × 20, and then 100 g of flint glass cullet (soda lime glass cullet) of 3 to 7 mm is added and leveled almost uniformly. On top of that, 100 g of glass particles mixed at a ratio of flint glass (soda lime glass cullet): blue glass = 1: 1 of the same particle size are placed and leveled almost uniformly. Blue glass had an expansion coefficient of 86 × 10 −7 / ° C. (approximate to flint glass), and a glass composition that did not crystallize at this temperature was selected. The accumulated materials are put in a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. A pattern of white particles floating like islands in a glossy transparent blue was obtained.
[0023]
[Example 2 ]
After applying a release agent to a ceramics sheath mold having an internal size of 100 × 100 × 20, 100 g of flint glass cullet (soda lime glass cullet) of 3 to 5 mm is put and leveled almost uniformly. On top of that, 100 g of glass particles (soda lime glass cullet) mixed at a ratio of flint glass: EG glass = 8: 2 of the same particle size is placed and leveled almost uniformly. Further, an appropriate amount of non-crystallized glass particles colored pink was sprayed on the surface. The accumulated materials are put in a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. Pink glass has an expansion coefficient of 86 × 10 ⁻⁷ / ° C. (approximate to flint glass), and since a composition that does not crystallize at this temperature is selected, it exhibits a glossy and transparent pink color. A translucent panel having a thickness of about 8 mm and a pattern that can image a tree was obtained.
[0024]
[Reference Example 4 ]
1 to 3 are drawings for explaining a method for producing a glass panel of Reference Example 2. FIG. After the release agent is applied to the ceramics sheath mold 3 having an internal dimension of 100 × 100 × 20, 100 g of flint glass cullet (soda lime glass cullet) 2a having a thickness of 3 to 5 mm is placed and leveled almost uniformly. Furthermore, a pre-molded product 1 (5 mm thick snake eye shape) pre-molded (hardened with an adhesive) with 1 to 3 mm DS (dark smoke) glass cullet (soda-lime glass cullet) is placed thereon, and 100 g of flint is placed. The voids and the periphery of the pre-molded product 1 are filled with glass cullet (soda-lime glass cullet) 2b. The flint glass cullet including the pre-molded product 1 thus accumulated is placed in a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. A translucent glass panel 4 having a thickness of about 8 mm in which a black snake-eye pattern (DS glass cullet 1 part) was formed in a white geometric pattern (flint glass cullet 2 part) was obtained. According to this method, a glass panel with characters and figures can be easily manufactured. Any organic adhesive can be used as the binder. By the heat treatment, the organic adhesive component diffuses into the air and does not remain on the glass panel.
[0025]
[Example 3 ]
A release agent is applied to a ceramics sheath mold having an internal dimension of 100 × 100 × 20, and then 100 g of flint glass cullet (soda lime glass cullet) of 3 to 7 mm is added and leveled almost uniformly. On top of that, 100 g of glass particles mixed at a ratio of dark smoked glass (soda lime glass cullet): amorphous flint glass = 8: 2 of the same particle size are placed and leveled almost uniformly. The amorphous flint glass has an expansion coefficient of 86 × 10 ⁻⁷ / ° C. (approximate to flint glass), and a composition that does not crystallize at this temperature is selected. This is put into a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. A glass panel having transparent spots with high translucency in black was obtained. This panel can be constructed with light and darkness emphasized by applying light from the back.
[0026]
[Reference Example 5 ]
After applying a release agent to a ceramics sheath mold having an internal size of 100 × 100 × 20, 200 g of flint glass cullet (soda lime glass cullet) of 7 to 15 mm is put and leveled almost uniformly. The accumulated materials are put in a heating furnace and heated to 930 ° C. at a temperature rising rate of 200 ° C./hour. After maintaining at 930 ° C. for 2 hours, it is cooled to room temperature at a cooling rate of 100 ° C./hour. A translucent panel having a geometric pattern with a thickness of about 8 mm was obtained. This is a large geometric pattern and improved translucency compared to the case where a cullet of 3 to 7 mm is used.
[0027]
【The invention's effect】
The glass panel of the present invention does not need to be formed by melting glass having a special composition as a glass grain of a raw material, and 100% soda-lime glass cullet can be used, so that it can be manufactured very easily and inexpensively. In addition, it will promote the demand for glass cullet and contribute to recycling. Moreover, various aesthetics can be acquired or translucency can be improved by using together a colored cullet and the glass grain which does not crystallize, or making it 2 layer structure. Moreover, the glass panel containing a character and a figure can be easily manufactured by using the pre-molding of arbitrary shapes, such as a character and a figure.
[Brief description of the drawings]
FIG. 1 is a perspective view of a pre-molded product 1. FIG.
FIG. 2 is a cross-sectional view of a state in which a mold 3 is filled with a pre-molded product 1 and flint glass cullet 2a, 2b.
FIG. 3 is a plan view of a glass panel 4;
[Explanation of symbols]
1 Pre-molded product 2 Flint glass cullet 3 type 4 glass panel

Claims (4)

A first layer is formed with soda-lime glass cullet , and a second layer is formed with amorphous glass grains having a composition that does not crystallize at 880 ° C. to 960 ° C., and this is formed at 880 ° C. to 960 ° C. for 1-2 hours. The cullet or glass grain is softened and fused by heating, and at least a part of the cullet of the first layer is crystallized in the outer peripheral part and is amorphous in the second part. A glass panel characterized in that the glass grains of the layer are non-crystalline . A first layer is formed with soda-lime glass cullet , and a second layer is formed with non-crystalline glass grains having a composition that does not crystallize at 880 ° C. to 960 ° C. and soda lime glass cullet , and this is formed at 880 ° C. to 960 ° C. The cullet or glass particles are softened and fused by heating for 1-2 hours, and at least a part of the cullet of the first layer is crystallized in the outer peripheral part and becomes amorphous in the inside. A non-crystalline glass grain of the second layer is non-crystalline. Soda lime glass cullet as a first layer, a step of accumulating non-crystalline glass grains having a composition that does not crystallize at 880 ° C. to 960 ° C. as a second layer, and those accumulated in these two layers at 880 ° C. to 960 ° C. heated ℃ for 1-2 hours with a step of softening fusing the cullet or glass particles, and a step of slow cooling, that at least a portion of cullet of the first layer, the outer peripheral portion is crystallized A method for producing a glass panel , wherein the inside is amorphous and the glass particles of the second layer are amorphous . The soda-lime glass cullet is used as the first layer, and a step of accumulating a mixture of non-crystalline glass grains having a composition that does not crystallize at 880 ° C. to 960 ° C. and soda-lime glass cullet as the second layer, and these two layers At least a part of the cullet of the first layer, comprising: heating the cullet or glass particles at 880 ° C. to 960 ° C. for 1-2 hours to soften and fuse the cullet or glass particles; The method for producing a glass panel is characterized in that the outer peripheral portion is crystallized and the inside is amorphous, and the amorphous glass particles of the second layer are amorphous .

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