KR20210130597A - Ilite silica mixed slabs and method for manufacturing the same - Google Patents

Abstract

The present invention relates to an illite silica mixed slab and a manufacturing method thereof. According to an embodiment of the present invention, the illite silica mixed slab comprises 50 to 74 parts by weight of silica, 25 to 40 parts by weight of illite, 0.5 to 0.8 parts by weight of a resin, 0.1 to 0.2 parts by weight of a curing agent, and 0.1 to 0.2 parts by weight of a pigment, thereby obtaining strength and preventing bubbles from being generated.

Description

ILITE SILICA MIXED SLABS AND METHOD FOR MANUFACTURING THE SAME

The present invention relates to an illite silica mixed slab and a method for manufacturing the same, and more particularly, to an illite silica mixed slab capable of securing the strength of the slab by controlling the silica and illite components, preventing the occurrence of bubbles, and having other useful functions. and to a method for manufacturing the same.

The slab is one of the materials widely used in various fields including interior and exterior materials of buildings.

In general, artificial stone slabs manufactured artificially are mainly used. For example, stone powder made of alumina hydroxide, dolomite, silica sand, etc., a resin, a hardener, etc. are mixed and then hardened, etc. are produced in various ways.

The slab has the advantage of being easy to process and install, and has the advantage of being strong against heat or moisture compared to other materials, for example wood, and being able to implement various patterns or colors. Furthermore, while the slab has a surface texture similar to that of expensive marble or granite, it is widely used in various fields because of its relatively low price. On the other hand, slabs can be used in health functional furniture such as stone beds, and are widely used in various products in real life.

However, in the case of the conventional slab, it is difficult to secure the required strength of the slab, and there are disadvantages in that it is weak to scratches and vulnerable to external contamination. In addition, there was a problem in that bubbles were generated during the manufacture of slabs, resulting in product defects.

As a prior document related to the present invention, there is Republic of Korea Patent Publication No. 10-2007-0080094 (published on Aug. 9, 2007), and the prior document introduces an artificial slab manufacturing apparatus and a manufacturing method. However, according to the prior art, there is no suggestion at all about a solution for securing the strength of the slab and preventing the generation of bubbles.

Republic of Korea Patent Publication No. 10-2007-0080094

It was devised to solve the above problems, and an object of the present invention is to control the composition of illite and silica, and to improve the strength of the slab by selecting the optimal particle size of silica, and at the same time to prevent the occurrence of defects by preventing the occurrence of bubbles. To provide an illite silica mixed slab and a method for manufacturing the same.

Another object of the present invention is to provide a slab that has high strength and is made of pure white color through control of the silica component, is strong against scratches and is resistant to external contamination, and a method for manufacturing the same.

Another object of the present invention is to suppress the generation of air bubbles during slab production by controlling the illite component, as well as being strong against high temperatures due to silicon dioxide and having excellent UV transmittance, and antibacterial, deodorizing, and air purification functions due to titanium oxide To provide a slab having a slab and a method for manufacturing the same.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. Moreover, it will be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, the illite silica mixed slab manufacturing method according to an embodiment of the present invention is (a) forming a primary mixture by mixing silica, illite, a resin, and a curing agent in a set ratio to form a primary mixture step; (b) mixing and pulverizing the first mixture to form a secondary mixture to form a secondary mixture; (c) a supply step of supplying the secondary mixture to the prepared slab mold; (d) a pressing step of pressing the secondary mixture accommodated in the slab frame to form a pressurized material; and (e) a heating step of heating the pressurized material.

In step (a), the first mixture, 50 to 74 parts by weight of silica; Illite 25 to 40 parts by weight; 0.5 to 0.8 parts by weight of resin; and 0.1 to 0.2 parts by weight of a curing agent.

In the step (a), the first mixture, 0.1 to 0.2 parts by weight of the pigment; it further comprises.

The step (b) includes: (b-1) transferring the primary mixture using a first conveyor belt; and (b-2) mixing and pulverizing the primary mixture transferred through the first conveyor belt using a pulverizer.

The step (c) includes: (c-1) transferring the secondary mixture after the mixing and pulverization by using a second conveyor belt; and (c-2) filling and accommodating the secondary mixture transferred through the second conveyor belt into the interior of the slab frame.

In the step (c-2), the secondary mixture to be filled into the slab frame may be quantitatively accommodated according to a preset reference weight.

In step (c-2), when the secondary mixture is received into the slab mold, the weight of the received secondary mixture is measured in real time in the slab mold, and the measured real-time weight of the secondary mixture When the reference weight is reached, the feeding operation of the second conveyor belt may be stopped to stop the supply of the secondary mixture.

The step (d) includes: (d-1) transferring the slab frame in which the secondary mixture is accommodated by the reference weight using a third conveyor belt; and (d-2) positioning the secondary mixture accommodated in the slab transported through the third conveyor belt below the press device and driving the press device to pressurize it to form a preset slab-shaped pressurized object. including;

The step (e) may include: (e-1) transferring the pressurized material using a fourth conveyor belt; and (e-2) preparing the slab by putting the pressurized material transferred through the fourth conveyor belt into the oven device, and heating it within the range of 87 to 95 degrees Celsius for 35 to 40 minutes; do.

After the step (e-2), (f) naturally cooling the heated slab within the range of 5 to 25 degrees Celsius for 9 to 12 hours; (g) grinding the surface of the slab after the natural cooling; and (h) polishing the surface of the slab after the grinding process has been completed.

In step (a), the first mixture may be formed by mixing silica, illite, resin, curing agent, and pigment in the prepared mixer tank and then mixing.

In addition, according to an embodiment of the present invention, as an illite silica mixed slab prepared by the above-described illite silica mixed slab manufacturing method, 50 to 74 parts by weight of silica, 25 to 40 parts by weight of illite, 0.5 to 0.8 parts by weight of a resin, By including 0.1 to 0.2 parts by weight of a curing agent, and 0.1 to 0.2 parts by weight of a pigment, it is possible to provide an illite silica mixed slab characterized by securing strength and preventing foaming.

According to the present invention, there is an advantage in that it is possible to control the composition of illite and silica, select the optimum particle size of silica to improve the strength of the slab, and at the same time prevent the generation of bubbles, thereby preventing the occurrence of defects in the product.

In addition, according to the present invention, there is an advantage in that it is possible to provide a slab that has high strength and is made of pure white through control of the silica component, is resistant to scratches and is resistant to external contamination.

In addition, according to the present invention, by controlling the illite component, it not only suppresses the generation of bubbles during slab production, but also has strong high temperature resistance due to silicon dioxide, excellent UV transmittance, and antibacterial, deodorizing, and air purification functions due to titanium oxide. There are advantages to providing

In addition, according to the present invention, there is an advantage in that the illite component generates negative ions through the slate product to enhance blood purification, resistance enhancement, autonomic nerve modulation, and cell regeneration.

In addition, according to the present invention, it is possible to emit far-infrared energy through a slab by using it as an illite component, and it has various advantages that it can have a non-irritating action on the skin such as heat action, nutrient supply, odor neutralization, waste excretion promotion, antibacterial deodorization, and skin. have.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 is a flowchart schematically illustrating a method for manufacturing an illite silica mixed slab according to an embodiment of the present invention.
2 is a flow chart schematically illustrating detailed steps after the heating step in the method for manufacturing illite silica mixed slabs according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the present invention set forth below refers to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the following detailed description is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents to those claimed. In the drawings, like reference numerals refer to the same or similar functions in various aspects, and the length, area, thickness, and the like may be exaggerated for convenience.

Hereinafter, in order to enable those of ordinary skill in the art to easily practice the present invention, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart schematically illustrating a method for manufacturing an illite silica mixed slab according to an embodiment of the present invention. 2 is a flowchart schematically illustrating detailed steps after the heating step (S500) in the illite silica mixed slab manufacturing method according to an embodiment of the present invention.

Referring to Figure 1, the illite silica mixed slab manufacturing method according to an embodiment of the present invention comprises a first mixture forming step (S100), a secondary mixture forming step (S200), a slab mold supply step (S300), a pressing step ( S400). It includes a heating step (S500).

In addition, referring to Figure 2, after the heating step (S500), the illite silica mixed slab manufacturing method according to an embodiment of the present invention is a natural cooling step (S600), a grinding process step (S700), a polishing step (S800) further includes

First mixture forming step (S100)

This step is a step of forming a primary mixture by mixing silica, illite, resin, and curing agent in a set ratio.

As a specific example, according to an embodiment of the present invention, the first mixture formed in the first mixture forming step (S100) is 50 to 74 parts by weight of silica, 25 to 40 parts by weight of illite, 0.5 to 0.8 parts by weight of resin, and 0.1 parts by weight of curing agent. to 0.2 parts by weight, and 0.1 to 0.2 parts by weight of a pigment.

Silica controls the strength of the slab. As is well known, silica has high strength, is made of pure white, is resistant to scratches, and is resistant to external contamination.

Silica may be included in an amount of 50 to 74 parts by weight. If the silica is included in less than 50 parts by weight, it may cause a problem of lowering the strength of the slab. On the other hand, when the amount of silica exceeds 74 parts by weight, there is a problem of cost increase due to excessive silica content, and the illite content ratio is relatively low, which may result in defective slabs due to the pinol phenomenon, that is, bubble generation.

Therefore, the silica is preferably included in an amount of 50 to 74 parts by weight. For example, silica is preferably included in an amount of 58.8 to 74.3 parts by weight, more preferably silica may be included in an amount of 66.5 parts by weight.

In addition, the silica particle size may include a first set size (0.1 to 0.3 mm), a second set size (0.3 to 0.7 mm), and a third set size (0.7 mm to 1.2 mm).

For example, when the silica particle size is the first set size (0.1 to 0.3 mm), it is preferable that silica is included in 74 parts by weight, and illite is included in 25 parts by weight. On the other hand, when the silica particle size is a third set size (0.7 to 1.2 mm) larger than the first set size (0.1 to 0.3 mm), 50 parts by weight of silica (preferably 58.8 parts by weight), and 40 parts by weight of illite It is preferable to be included in parts by weight.

As such, the silica and illite content can be adjusted according to the silica particle size. As the silica particle size increases, the silica content decreases and the illite content increases. As the silica particle size decreases, the silica content increases and the illite content increases. Reducing the content is advantageous for securing the strength of the slab and suppressing the occurrence of bubbles.

In addition, the silica particle size may be mixed among the first, second, and third set sizes to produce a slab. For example, when the silica particle size is mixed with the first set size (0.1 to 0.3 mm) and the second set size (0.3 to 0.7 mm), 69.3 parts by weight of silica and 30 parts by weight of illite may be included. In other words, the silica particle size may include at least one of the first, second, and third set sizes, and the silica and illite content may be appropriately adjusted according to the silica particle size.

Illite prevents the formation of bubbles in the slab. Illite may be included in an amount of 25 to 40 parts by weight. As a specific example, illite is preferably included in an amount of 30 parts by weight.

If the illite is included in less than 25 parts by weight, there is a problem in that the pinol phenomenon (that is, a phenomenon that is difficult to use as a slab due to the generation of air bubbles) occurs, thereby increasing the defect rate. On the contrary, when the amount of illite exceeds 40 parts by weight, the silica content may be relatively reduced, and thus there is a problem of lowering the strength of the slab. Therefore, illite is preferably included in an amount of 25 to 40 parts by weight.

Illite has the advantages of suppressing the pinol phenomenon, that is, the generation of bubbles due to its non-expandability, strong resistance to high temperature due to silicon dioxide, and excellent UV transmittance. In addition, Illite has an antibacterial function, a deodorizing function and an air purification function due to titanium oxide.

In addition, Illite generates negative ions, and has advantageous functions of increasing blood purification, resistance enhancement, autonomic nerve modulation, and cell regeneration.

In addition, Illite emits far-infrared energy and has the advantage of heating action, supplying nutrients, neutralizing odor, promoting waste excretion, antibacterial, deodorizing, and non-irritating to the skin.

The resin serves to firmly mix silica and illite with each other. As a specific example, the resin may be included in an amount of 0.5 to 0.8 parts by weight.

If the amount of the resin is less than 0.5 parts by weight, there may be a problem that a solid mixing action between silica and illite cannot be achieved due to insufficient resin content. Conversely, when the resin content exceeds 0.8 parts by weight, the effect of further improvement compared to the addition of the content is insignificant, and there may be disadvantages due to an increase in cost, a decrease in the content of other components, and the like.

The hardening agent serves to allow the slate mixed with silica, illite and resin to harden in a short time. As a specific example, the curing agent may be included in an amount of 0.1 to 0.2 parts by weight.

If the amount of the curing agent is less than 0.1 parts by weight, it may be difficult to harden the slab for a short time due to the insufficient amount of the curing agent. Conversely, when the curing agent exceeds 0.2 parts by weight, the improvement effect is insignificant compared to the content of the added curing agent, and there may be disadvantages due to the content of other components plasticized.

Pigments serve to give color to the slabs. As a specific example, the pigment may be mixed in an amount of 0.1 to 0.2 parts by weight. The color of the pigment may include at least one color according to a user's selection.

If the pigment is mixed in less than 0.1 parts by weight, there may be a lack of color realization through the slab. Conversely, when the amount of the pigment exceeds 0.2 parts by weight, there may be insignificant aspects that are more effective for color realization compared to the content of the added pigment, and on the contrary, there may be a disadvantage in that the material cost of the pigment increases.

Secondary mixture forming step (S200)

This step is a step of mixing and pulverizing the primary mixture to form a secondary mixture.

As a specific example, in the illite silica mixed slab manufacturing method according to an embodiment of the present invention, the secondary mixture forming step (S200) includes a primary mixture transferring step (S210) and a primary mixture mixing and pulverizing step (S220). .

The primary mixture transfer step (S210) refers to a step of transferring the primary mixture mixed in the previous step (S100) using a first conveyor belt.

The primary mixture mixing and pulverizing step (S220) refers to a step of mixing and pulverizing the primary mixture transferred through the first conveyor belt through the first mixture conveying step (S210) using a pulverizer.

Slab frame supply step (S300)

This step is a step of feeding the secondary mixture into the prepared slab mold.

As a specific example, in the illite silica mixed slab manufacturing method according to an embodiment of the present invention, the slab frame supply step (S300) includes a secondary mixture transfer step (S310) and a secondary mixture receiving step (S320).

The secondary mixture transfer step S310 refers to a step of transferring the secondary mixture that has been mixed and pulverized in a crusher (eg, a crusher, etc.) through the previous step S200 using a second conveyor belt. Here, although not shown separately, the second conveyor belt refers to a transfer belt that provides a transfer function in a section different from the first conveyor belt described above. It can be operated with, and can be changed according to various embodiments that are obvious to those skilled in the art.

The secondary mixture receiving step ( S320 ) refers to a step of accommodating the secondary mixture transferred through the second conveyor belt by filling the inside of the slab frame.

Specifically, in the secondary mixture receiving step (S320), the secondary mixture filled into the slab frame is preferably accommodated in a fixed amount according to a predetermined weight value, that is, a reference weight.

For example, in the secondary mixture receiving step ( S320 ), when the secondary mixture is accommodated in the slab mold using a weight sensor, the weight of the secondary mixture accommodated in the slab mold can be measured in real time. The weight detection sensor may be configured to detect only the weight of the secondary mixture accommodated inside the slab frame in real time. In contrast, it is installed in the slab frame to measure the total weight of the slab frame and the secondary mixture accommodated therein in real time. It is possible to detect only the weight of the secondary mixture in real time. In addition, a method of measuring the weight of the secondary mixture filled into the slab frame by including a level sensor for detecting the receiving height of the secondary mixture filled into the slab frame may be used. However, the present invention is not limited thereto, and various weight sensing methods obvious to those skilled in the art may be used without limitation.

Meanwhile, when the measured real-time weight of the secondary mixture reaches the reference weight, the feeding operation of the second conveyor belt may be stopped to stop the supply of the secondary mixture. As a result, the secondary mixture can be accommodated in a predetermined amount in the slab mold, so that the standard of the manufactured slab can be kept constant.

Pressing step (S400)

This step is a step of forming a pressurized product by pressing the secondary mixture accommodated inside the slab mold.

As a specific example, in the method for manufacturing illite silica mixed slabs according to an embodiment of the present invention, the pressing step (S400) includes a slab frame transfer step (S410), and a pressurized material forming step (S420).

The step of transferring the slab frame ( S410 ) refers to a step of transferring the slab frame in which the secondary mixture is accommodated therein by the reference weight using the third conveyor belt.

In the pressurized material forming step (S420), the secondary mixture accommodated in the slab transported through the third conveyor belt is positioned under the press device, and the press device that exerts a press force up and down is driven to pressurize the secondary mixture. Thus, it refers to the step of forming a preset slab-shaped pressurized object. The press device refers to a device that applies a pressing force of a set size up and down toward the inside of the slab frame, and various types of press working devices obvious to those skilled in the art can be used without limitation. For example, a press device of 4800 RPM may be used. However, the present invention is not limited thereto.

Heating step (S500)

This step refers to a step of heating the pressurized material formed by being pressurized by the press device in the previous step (S400) at a set temperature.

As a specific example, the heating step (S500) in the illite silica mixed slab manufacturing method according to an embodiment of the present invention includes a pressurized water transfer step (S510), and an oven input and heating step (S520).

In the pressurized material transfer step ( S510 ), the pressurized material is transferred using a fourth conveyor belt. The fourth conveyor belt is a device for transferring the pressurized material by connecting the press device and the oven.

In the oven input and heating step (S520), the pressurized material transferred through the fourth conveyor belt is put into the inside of the oven device prepared in advance, and a set temperature, for example, a set time within the range of 87 to 95 degrees Celsius, for example The slab is prepared by heating for 35 to 40 minutes. In this way, it is possible to harden the slab more quickly by heating the pressurized material to a set temperature and for a set time using an oven device.

Meanwhile, the method for manufacturing illite silica mixed slabs according to an embodiment of the present invention further includes the detailed steps shown in FIG. 2 .

Referring to FIG. 2 , a natural cooling step ( S600 ), a grinding processing step ( S700 ), and a polishing step ( S800 ) are further included after the heating step ( S500 ) shown in FIG. 1 .

Natural cooling step (S600)

In this step, when the slab is prepared by being put into the oven device in the previous step (S500) and heated within the range of 87 to 95 degrees Celsius for 35 to 40 minutes, it is taken out from the oven device and brought out at room temperature, for example, 5 to 25 degrees Celsius. It refers to the step of natural cooling for a predetermined time in the range, for example, 9 to 12 hours.

Grinding processing step (S700) and polishing step (S800)

The grinding processing step (S700) refers to a step of flattening the surface of the slab after natural cooling, and various types of grinding apparatuses that are obvious to those skilled in the art may be used. The surface of the slab that has been naturally cooled through the grinding processing step (S700) can be flattened and processed smoothly.

The polishing step (S800) refers to a step of polishing the surface of the slab after the grinding processing step (S700). For the polishing process, various polishing apparatuses and methods apparent to those skilled in the art can be used without limitation.

As described above, according to the configuration and operation of the present invention, in manufacturing a slab through illite and silica mixing, the strength of the slab is improved by controlling the illite and silica composition and selecting the optimum particle size for silica, It is possible to prevent the occurrence of defects by suppressing the generation of bubbles.

Furthermore, by controlling the silica component, it is possible to provide a slab that is high in strength, is made of pure white, is resistant to scratches, and is resistant to external contamination.

Furthermore, it is possible to provide a slab that not only suppresses the generation of bubbles during slab manufacturing through illite component control, but is also strong against high temperatures due to silicon dioxide, has excellent UV transmittance, and has antibacterial, deodorizing, and air purification functions due to titanium oxide. can

Even, by generating negative ions through lithographic products by the illite component, it can have advantageous effects of increasing blood purification, resistance enhancement, autonomic nerve modulation, and cell regeneration.

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made. In addition, even if the effect of the configuration of the present invention is not explicitly described and described while describing the embodiment of the present invention, it is natural that the effect predictable by the configuration should also be recognized.

S100: first mixture forming step
S200: secondary mixture formation step
S300: Slab frame supply stage
S400: pressurization step
S500: heating stage
S600: Natural cooling stage
S700: Grinding process step
S800: Polishing step

Claims (12)

(a) a first mixture forming step of mixing silica, illite, a resin, and a curing agent in a set ratio to form a first mixture;
(b) mixing and pulverizing the first mixture to form a secondary mixture to form a secondary mixture;
(c) a supply step of supplying the secondary mixture to the prepared slab mold;
(d) a pressing step of pressing the secondary mixture accommodated in the slab frame to form a pressurized material; and
(e) a heating step of heating the pressurized material; Illite silica mixed slab manufacturing method comprising a.
According to claim 1,
In step (a),
The first mixture is
50 to 74 parts by weight of silica;
Illite 25 to 40 parts by weight;
0.5 to 0.8 parts by weight of resin; and
Illite silica mixed slab manufacturing method comprising; curing agent 0.1 to 0.2 parts by weight.
3. The method of claim 2,
In step (a),
The first mixture is
0.1 to 0.2 parts by weight of a pigment; Illite silica mixed slab manufacturing method further comprising.
4. The method of claim 3,
Step (b) is,
(b-1) transferring the first mixture using a first conveyor belt; and
(b-2) mixing and pulverizing the primary mixture transferred through the first conveyor belt using a pulverizer;
4. The method of claim 3,
The step (c) is,
(c-1) transferring the secondary mixture after the mixing and pulverization by using a second conveyor belt; and
(c-2) filling and accommodating the secondary mixture transferred through the second conveyor belt into the slab frame;
6. The method of claim 5,
In step (c-2),
The method for manufacturing illite silica mixed slabs, characterized in that the secondary mixture filled into the interior of the slab frame is accommodated in a fixed amount according to a preset reference weight.
7. The method of claim 6,
In step (c-2),
When the secondary mixture is accommodated in the slab mold, the weight of the secondary mixture accommodated in the slab mold is measured in real time, and when the measured real-time weight of the secondary mixture reaches the reference weight, the second mixture 2 A method for producing illite silica mixed slabs, characterized in that the supply of the secondary mixture is stopped by stopping the conveying operation of the conveyor belt.
7. The method of claim 6,
Step (d) is,
(d-1) transferring the slab frame in which the secondary mixture is accommodated by the reference weight using a third conveyor belt; and
(d-2) positioning the secondary mixture accommodated in the interior of the slab transferred through the third conveyor belt to the lower part of the press device to drive the press device to pressurize to form a preset slab-shaped pressurized product A method for producing illite silica mixed slabs comprising the steps of:
9. The method of claim 8,
Step (e) is,
(e-1) transferring the pressurized material using a fourth conveyor belt; and
(e-2) preparing the slab by putting the pressurized material transferred through the fourth conveyor belt into the oven device, and heating it within the range of 87 to 95 degrees Celsius for 35 to 40 minutes; A method for manufacturing illite silica mixed slabs.
10. The method of claim 9,
After step (e-2),
(f) naturally cooling the heated slab within the range of 5 to 25 degrees Celsius for 9 to 12 hours;
(g) grinding the surface of the slab after the natural cooling; and
(h) polishing the surface of the slab after the grinding process; Illite silica mixed slab manufacturing method further comprising a.
4. The method of claim 3,
In step (a),
The first mixture is an illite silica mixed slab manufacturing method, characterized in that the silica, illite, resin, curing agent, and pigment are added to the prepared mixer tank and then mixed to form.
12. An illite silica mixed slab prepared by the method for manufacturing the illite silica mixed slab according to any one of claims 3 to 11,
50 to 74 parts by weight of silica, 25 to 40 parts by weight of Illite, 0.5 to 0.8 parts by weight of a resin, 0.1 to 0.2 parts by weight of a curing agent, and 0.1 to 0.2 parts by weight of a pigment, characterized in that it is characterized in that it is characterized in that the strength is secured and the generation of bubbles is prevented. Illite Silica Mixed Slabs.

Images