JPH0717732A - Production of integrally remelted glass - Google Patents

Abstract

PURPOSE:To improve strength, breakage resistance and impact resistance of the integrally remelted glass by inserting metal wire into granular glass and firing the resulting material at a low temp. CONSTITUTION:In the production of the integrally remelted glass, a granular glass material consisting of 70 to 99.5% component A and 0.5 to 30% component B is used. The component A is optional granular glass selected from plate glass scraps, etc., such as glass cullet, frit and natural glass, each of which has 1 to 30mm particle size. The component B is optional granular glass having <=1mm particle size, a melting point lower than that of the component A and high expansion characteristics and incorporated to the surface of the component A by coating it to obtain the granular glass material. If necessary, an inorganic pigment is added to the resulting granular glass material by dispersing it into the spaces among the glass granules or coating it on the surfaces of the glass granules. A firing mold is covered and packed with an adequate amount of the above granular glass material. Then the metal wire made of stainless steel having a 7 to 20X10<-6>/ deg.C thermal expansion coefficient, etc., in a wire like form having 0.1 to 1.5mm wire diameter or in a wire mesh form having 5 to 15 mm mesh size is placed on the above granular glass material and further the metal wire is covered with an adequate amount of the granular glass material. Thereafter the resulting contents of the firing mold are fired at 700 to 1000 deg.C for one to three hours.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for producing a high-impact-resistant remelted glass having a high strength and an effective measure against the risk of falling off at the time of breakage in a surface glossy plate material used for building materials and the like. It is about.

[0002]

2. Description of the Related Art Crystallized glass is well known as a surface gloss plate material used for building materials and the like. The method of manufacturing crystallized glass involves making a glass blank and then
There are a method of producing by crystallization by firing at 1000 to 1200 ° C and a method of integrating glass particles to produce by crystallization by firing at 1000 to 1200 ° C.

The former requires two firings including the production of a raw sheet, and both have high firing temperatures, so that productivity is low. Furthermore, although high strength is achieved by crystallization, it is brittle against fracture. Therefore, after construction as a building material, it is feared that it will fall due to damage.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a high-strength, high-impact-resistant, low-temperature remelted glass having a high impact resistance.

[0005]

DISCLOSURE OF THE INVENTION The present invention is intended to provide a method for producing an integrated low-temperature remelted glass, which comprises inserting a metal wire into a granular glass and firing it at 700 to 1000 ° C. is there.

Among the glass particles used in the present invention, any one having a particle size of 1 to 30 mm, that is, for example, glass cullet, frit or natural glass is used. From the viewpoint of raw material cost, it is expressed in% by weight,
SiO ₂ 71-73%, Al ₂ O ₃ 1-2%, CaO 6
~ 7%, Na ₂ O + K ₂ O 14-15%, MgO 3-4
% Glass flake is preferred. Further, as the particles having a particle diameter of 1 mm or less, as in the case of the particles having a particle diameter of 1 to 30 mm, any materials such as glass cullet, frit and natural glass are used. In order to promote the adhesion with the metal wire and the bonding of the glass particles having a particle diameter of 1 to 30 mm, and further to tune the thermal expansion with the metal wire, SiO _{2 0 to} 37% in weight% display, Al ₂ O ₃ 0 to 1
%, CaO 0-4%, Na ₂ O + K ₂ O 0-15%,
MgO 0-2%, B ₂ O ₃ 15-60%, PbO 0-
70%, ZnO 0-40%, glass having a softening point lower than that of the above glass particles having a particle diameter of 1-30 mm and a large thermal expansion coefficient of 1 mm
It is preferable to use all or part of the following glass.

Any method can be used as a method of mixing the glass having a particle diameter of 1 mm or less, but in order to uniformly bring out the effect, the surface of the glass having a particle diameter of 1 to 30 mm is coated in advance. Is desirable. For coating, glass with a particle size of 1 mm or less has a particle size of 50 μm.
The following is desirable.

The coefficient of thermal expansion of the metal wire used in the present invention is preferably 7 to 20 × 10 ⁻⁶ / ° C., and 700
It is preferable to maintain the shape and strength at a firing temperature of 1000 ° C. When the coefficient of thermal expansion of the metal wire is out of the above range, harmful difference may occur during firing due to a large difference in coefficient of thermal expansion with the glass matrix, which is not preferable. Although stainless steel, nickel steel, etc. are mentioned as an inexpensive material that meets these conditions, it is preferable to use stainless steel having excellent corrosion resistance in consideration of the possibility of being used outdoors.

As for the form of the metal wire rod, since the purpose of inserting the metal wire rod is to improve impact resistance, it is preferable to use a mesh-like one having a two-dimensional arrangement rather than a wire-like one having a one-dimensional insertion arrangement. preferable.

The wire diameter of the metal wire can be 1.5 mm or less, and is preferably about 0.4 to 1.1 mm from the viewpoint of versatility. Wires with a wire diameter of 1.1 mm or more become expensive,
In addition, the difference in thermal expansion from the glass matrix is likely to be adversely affected, which is not preferable. Further, a wire having a wire diameter of less than 0.4 mm is not preferable because it is difficult to sufficiently improve the impact resistance.

When a metal mesh is used, it is effective that the mesh has a mesh size of 5 to 15 mm, especially 5 to 8 mm.
It is preferably in the range of. When the mesh spacing is small, the surface weight increases and the contact area between the upper and lower glass that is divided by the mesh decreases, so there is a high possibility that the molded body will peel off at the mesh after firing. On the other hand, if the meshes have a wide gap, the effect of improving impact resistance decreases, which is not preferable.

In the present invention, a high design can be obtained by adding a permanent pigment. As a method of adding a pigment,
Both the method of dispersing between glass particles and the method of coating on the surface of glass particles are effective. As a method of dispersing the glass particles between the glass particles, a method of mixing the glass particles with the pigment before the glass particles are stacked and a method of dropping the pigment on the stacked glass particles are effective.

Regarding the laminating method, an appropriate amount of the mixed raw material glass particles is spread in a baking mold, a metal wire is placed thereon, and an appropriate amount of the mixed raw material glass particles is laminated thereon. The insertion position of the metal wire can be adjusted by adjusting the amount of the raw material glass stacked above and below the metal wire. The laminate thus prepared is heated at 700-1000 ° C for 1-
By firing for 3 hours, a high impact resistant integrated low temperature re-melted glass can be obtained.

[0014]

Next, the operation of the present invention will be described. Since the glass matrix portion in the present invention has a low firing temperature, the crystallinity of the glass is very low, the surface of the glass particles is simply softened by heating, and the strength of the matrix is expressed by bonding the glass particles to each other. However, due to the reinforcing effect by inserting the metal wire rod, which is possible because the firing temperature is low, a material having high impact resistance can be obtained. Although the reason why the metal and the glass matrix are fixed to each other is not quantitatively clear, it can be qualitatively explained as follows.

That is, the glass particles around the metal wire are softened by heating to have viscosity, and the surface tension causes the softened glass to adhere to the periphery of the metal wire. By cooling, the softened glass that adheres to the surface of the metal wire rod solidifies, but within the scope of the present invention, the coefficient of thermal expansion of the metal wire rod and the glass do not differ greatly, so that a fired body can be obtained without causing abnormal deformation. . It is considered that since the glass solidifies in the state where the glass is in close contact with the periphery of the metal wire, the metal wire is constrained, and the restraining force and the high strength of the metal wire exert a reinforcing effect.

[0016]

EXAMPLES Examples and results are shown in Table 1. The following materials were used as the raw materials in the table. Soft glass grains; SiO ₂ 71-73%, A in weight%
l ₂ O ₃ 1 to 2%, Fe ₂ O ₃ 0.3 to 0.5% CaO
6-7%, Na ₂ O + K ₂ O 14-15%, particle size 1-
3mm low melting point glass particles; by weight _{percentages, B 2 O 3 50%,} P
bO 40%, K ₂ O 10%, particle size 0.01-0.02mm Pigment (red); wt% display, SnO ₂ 44%, CaO
24%, SiO ₂ 24%, Cr ₂ O ₃ 2%, BaO 5
%

The above raw materials were weighed so as to have the weight% shown in Table 1, 5% by weight of mixed water was added thereto, and they were uniformly mixed with a low speed mixer. The mixed raw material is mullite 330 x 33
Spread 1000g in 0mm formwork, level the surface,
A metal wire having a wire diameter of 0.5 mm and a mesh interval of 15 mm was placed thereon, and 1500 g of the mixed raw material was further laminated thereon to level the surface. This laminate was fired at 900 ° C. for 3 hours in an electric furnace to obtain a fired body.

The obtained fired body was polished to have a thickness of 10 mm, the surface was smoothed, and various tests were conducted. In the falling ball impact test, a 100 × 100 mm sample was supported on sand, a 1 kg steel ball was dropped in the center of the sample, and the drop ball height at which the sample was damaged was evaluated. Comparative examples are also shown in Table 1. As is clear from the table, the one according to the present invention has low temperature firing and excellent impact resistance.

[0019]

[Table 1]

[0020]

According to the present invention, high impact resistant integrated remelted glass having high impact resistance can be obtained by low temperature firing. Since such a fired body has the above-mentioned characteristics, it is particularly suitable for building materials such as wall materials.

Claims (4)

[Claims] 1. A metal wire rod is inserted into granular glass to obtain 700-
A method for producing a high impact-resistant integrated remelted glass, which comprises firing at 1000 ° C. 2. The particle size of the granular glass is 70 to 9 when the particle size is 1 to 30 mm.
The method for producing integrated remelted glass according to claim 1, wherein 9.5%, 0.5 mm and less than 1 mm are 0.5 to 30%. 3. A glass having a diameter of 1 mm or less among the granular glass has a lower melting point and a higher expansion characteristic than the granular glass having a diameter of 1 to 30 mm for the purpose of promoting strength development by low temperature firing and synchronizing thermal expansion with a metal wire. The method for producing the integrated remelted glass according to claim 1, which comprises the glass having. 4. The method for producing integrated remelted glass according to claim 1, wherein the metal wire has a wire diameter of 0.1 to 1.5 mm and is in the form of wire or mesh.