WO2020218851A1

WO2020218851A1 - Environment-friendly nonflammable furniture material including expanded vermiculite and method for manufacturing same

Info

Publication number: WO2020218851A1
Application number: PCT/KR2020/005384
Authority: WO
Inventors: 임흥묵
Original assignee: 임흥묵
Priority date: 2019-04-25
Filing date: 2020-04-23
Publication date: 2020-10-29
Also published as: KR102044658B1

Abstract

The present invention provides an environment-friendly nonflammable furniture material comprising expanded vermiculite and a method for manufacturing same, wherein the material, by using an environment-friendly composition, is harmless to the human body, can provide a humidity control function and antibacterial and deodorant properties, is easy to handle due to being lightweight relative to its volume, and is non-flammable while having superior compressive strength.

Description

Eco-friendly non-combustible furniture material containing expanded vermiculite and its manufacturing method

The present invention relates to an eco-friendly non-combustible furniture material including expanded vermiculite and a method of manufacturing the same, and more particularly, it is eco-friendly, harmless to the human body, can provide humidity control function, antibacterial property and deodorization, and is easy to handle with light weight compared to volume. The present invention relates to an eco-friendly non-combustible furniture material including expanded vermiculite having superior compressive strength compared to conventional non-combustible furniture materials and a manufacturing method thereof.

Furniture stores various objects or provides a space for objects to be used in a more comfortable position, and is generally made of solid wood, plywood, MDF, HDF, P/B, and H/B.

As such, furniture mainly using wood is relatively affected by moisture due to its material characteristics, and this moisture induces the growth of mold and moth in the furniture, as well as an environment suitable for insects such as cockroaches to inhabit. By providing the furniture, the user side is making various efforts to prevent the items such as blankets, clothes, or books stored therein from being deteriorated, but the effect is still insufficient.

In addition, in the case of using solid wood, it may be said that it is desirable in terms of strength and other various aspects, but as the wood itself must be dependent on imports, it is not only contrary to national interests, it is expensive, and there is a limit in processability, which puts a considerable burden on it. Considering that, artificial wood or synthetic wood, which is made of wood materials such as plywood, MDF, or particle board, which are supplied at a relatively low price, is widely used.

It is preferable that the conventional furniture made of artificial or synthetic wood is non-flammable and is manufactured to be lightweight for ease of transportation and operation. In addition, there are many products that require high strength due to the characteristics of furniture materials used for sink tops, bookcases, and dining tables.

Among them, in order to solve the problem related to non-combustibility, conventional furniture materials are manufactured by including various types of non-combustible compositions.

However, conventional non-combustible compositions use non-flammable agents or flame retardants made of various kinds of chemical substances to lower the price, and these chemical substances include various allergic diseases or respiratory diseases including formalin, toluene, volatile organic substances, etc. Not only does it cause various problems that are harmful to the human body such as, but also causes environmental pollution when discarded.

In addition, as one method for reducing the weight of the furniture material, a furniture material using expanded vermiculite is disclosed. However, since the expanded vermiculite has a porous characteristic, when a furniture material is manufactured with expanded vermiculite as a main component, the strength is basically weak, so it is difficult to satisfy the strength level of the product when applied to a sink top, a bookcase, a dining table, etc.

In addition, recently released furniture materials further contain various types of additives to add various functional properties such as antibacterial and deodorizing properties to increase marketability. When these additives are added to the furniture material containing expanded vermiculite as a main component, the bonding strength of each component is further lowered, and as a result, the compressive strength of the furniture material may be further weakened.

Prior art literature

Patent Literature

Korean Patent Publication No. 10-0695910

Korean Patent Publication No. 10-1213988

The present invention was conceived to solve the problems of conventional furniture materials, and provides excellent compressive strength over a certain level while having non-combustible and lightweight characteristics, and is easy to manufacture in various shapes desired by users, and is harmless to the human body and humidity. It is an object of the present invention to provide an eco-friendly non-combustible furniture material including expanded vermiculite and a method of manufacturing the same so as to have various functional characteristics such as control function, antibacterial property and deodorant property.

One aspect of the present invention is a second mixture formed by mixing the expanded vermiculite pulverized into 20 to 25 mesh and 5 to 30 parts by weight of the first mixture based on 100 parts by weight of the expanded vermiculite; And a third mixture formed by mixing liquid silicate soda and charcoal pulverized with 200 to 325 mesh. Consisting of, wherein the first mixture comprises 50 to 70% by weight of rosin powder pulverized with 300 to 325 mesh based on the total weight, and 30 to 50% by weight of alcohol, based on the total weight of the second mixture 80 to It provides an eco-friendly non-combustible furniture material comprising expanded vermiculite, characterized in that it comprises 95% by weight and 5 to 20% by weight of the third mixture.

In one embodiment of the present invention, the third mixture may contain 15 to 25 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda, and the charcoal is a first charcoal made of oak as a raw material and having a bar-shaped structure It may include 20 to 50% by weight of the powder, and 50 to 80% by weight of the second charcoal powder, which is made of pine and has a spherical structure.

In an embodiment of the present invention, the third mixture contains 40 to 80 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda, and the charcoal is a first charcoal powder 10 made of oak as a raw material and having a bar-shaped structure. To 35% by weight, and 25 to 45% by weight of the second charcoal powder having a spherical structure with pine as a raw material, and 20 to 45% by weight of the third charcoal powder formed by burning rice husk in a high temperature vacuum state. I can.

Another aspect of the present invention is a first step of preparing a first mixture by mixing 50 to 70% by weight of rosin powder pulverized into 300 to 325 mesh and 30 to 50% by weight of alcohol at room temperature; A second step of heating vermiculite at 1,000 to 1,100°C to prepare expanded vermiculite, and pulverizing the expanded vermiculite into 20 to 25 mesh; A third step of mixing 5 to 30 parts by weight of the first mixture with respect to 100 parts by weight of pulverized expanded vermiculite and stirring at 100° C. to prepare a liquefied second mixture; A fourth step of preparing a liquefied third mixture by mixing liquid silicate soda and charcoal pulverized with 200 to 325 mesh based on 100 parts by weight of the liquid silicate soda and stirring for 2 to 3 hours; And a fifth step of preparing a fourth mixture by stirring 80 to 95% by weight of the second mixture and 5 to 20% by weight of the third mixture for 2 to 3 hours based on the total weight of the fourth mixture. A sixth step of preparing a compressed body having a desired shape by pressing the fourth mixture at 180 to 230°C for 5 minutes with a hydraulic press having a pressure of 2,000 to 2,300 tons; A seventh step of naturally cooling the compressed body by demolding for 72 hours or more; An eighth step of removing foreign substances on the surface of the compressed body; And a ninth step of coating an inorganic binder on the surface of the compressed body. It provides a method of manufacturing an eco-friendly non-combustible furniture material containing expanded vermiculite comprising a.

In an embodiment of the present invention, in the fourth step, the third mixture may be prepared by mixing 15 to 25 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda, and the charcoal is obtained by burning oak wood in a vacuum at 800°C. It may include 20 to 50% by weight of the first charcoal powder having a rod-shaped structure provided, and 50 to 80% by weight of the second charcoal powder having a spherical structure prepared by burning pine trees at 800°C in a vacuum.

In an embodiment of the present invention, in the fourth step, the third mixture may be prepared by mixing 40 to 80 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda, and the charcoal is obtained by burning oak wood in a vacuum at 800°C. 10 to 35% by weight of the first charcoal powder having a rod-shaped structure provided, 25 to 45% by weight of the second charcoal powder having a spherical structure prepared by burning pine trees in a vacuum at 800°C, and a vacuum of rice hull at 1,500°C Third charcoal powder prepared by burning in 20 to 45% by weight; It may include.

According to the present invention, eco-friendly compositions such as expanded vermiculite, charcoal, and liquid silicate soda are used, and various functional characteristics such as humidity control function, antibacterial and deodorizing properties can be provided by the expanded vermiculite and charcoal. It can prevent various allergic diseases or respiratory diseases arising from furniture that directly or indirectly touches.

In addition, since the furniture material is molded while the resin powder fills the gap between the expanded vermiculite and the charcoal in a state where the porous expanded vermiculite is combined with charcoal, the manufactured furniture material is lightweight and non-combustible by volume, but has excellent compressive strength compared to existing non-combustible furniture materials. It has the effect of increasing the added value of furniture materials.

In addition, if the eco-friendly non-combustible furniture material manufactured according to the present embodiment is pulverized and liquefied at the time of disposal, it can be used again as a material for other furniture materials, so it is advantageous in recycling of resources and environmental protection.

1 is a flowchart illustrating a method of manufacturing an eco-friendly non-combustible furniture material including expanded vermiculite according to an embodiment of the present invention.

Figure 2 is a photograph showing the expanded vermiculite used in an embodiment of the present invention.

3 is a photograph showing a rosin powder used in an embodiment of the present invention.

4 is a photograph showing a state before the third charcoal powder used in an embodiment of the present invention is pulverized.

5 is a flowchart illustrating a method of manufacturing an eco-friendly furniture material including expanded vermiculite according to another embodiment of the present invention.

6 is a perspective view schematically showing a furniture material according to an embodiment of the present invention by partially cutting it.

Hereinafter, a preferred embodiment of the present invention will be described. However, the scope of the present invention is not limited to the embodiments described below and is defined by what is described in the claims, and those of ordinary skill in the field of the present invention can make various modifications and adaptations within the scope of the rights described in the claims. have.

6, the eco-friendly non-combustible furniture material 10 including expanded vermiculite according to an embodiment of the present invention includes an inner body 1 and a coating layer 2 covering the surface of the inner body 1 I can. The coating layer 2 may be formed by coating an inorganic binder on the surface of the inner body 1.

In addition, the inner body 1 may be formed including 90% by weight of the second mixture and 10% by weight of the third mixture based on the total weight.

The second mixture may be formed by mixing expanded vermiculite and 5 to 30 parts by weight of the first mixture based on 100 parts by weight of expanded vermiculite.

At this time, if the content of the first mixture is less than 5 parts by weight, the bonding strength of the rosin powder may not be sufficient, so that the strength of the furniture material may decrease. In addition, a relatively high content of the expanded vermiculite may cause problems in that the homogeneity of the second mixture is deteriorated, such as not being properly liquefied when the second mixture is prepared, or a part of the expanded vermiculite is locally agglomerated. This homogeneity problem can consequently act as a cause of lowering the compressive strength of furniture materials.

In addition, when the content of the first mixture exceeds 30 parts by weight, the content of expanded vermiculite is relatively small, and various effects of the expanded vermiculite may not be properly implemented.

At this time, the expanded vermiculite may be pulverized into particles having a size of 20 to 25 mesh. If the size of the pulverized expanded vermiculite is less than 20 mesh, there may be a problem that the vermiculite particles are exposed to the surface of the molded furniture material, making it difficult to see visually.If the size of the pulverized expanded vermiculite exceeds 25 mesh, when mixing raw materials Since mixing is difficult, the liquefaction of the second mixture is not performed properly, which may cause manufacturing problems.

In addition, the expanded vermiculite is a lightweight, natural material that is harmless to the human body and is an eco-friendly material. In addition, the expanded vermiculite has excellent non-combustibility of the first grade, and has good absorption capacity as a porous structure, so it is very effective when used as a furniture material mainly installed indoors.

The first mixture may include 50 to 70% by weight of rosin powder pulverized with 300 to 325 mesh and 30 to 50% by weight of alcohol based on the total weight.

Some of the conventional furniture materials use liquid sodium silicate as a binder to reinforce strength. However, due to its characteristics, liquid silicate soda has poor flow characteristics, so it is difficult to uniformly mix when mixing raw materials, and if a certain amount or more is excessively added, problems such as agglomeration or lump formation may occur.

In order to solve this problem, in this embodiment, some of the liquid sodium silicate may be replaced with a first mixture consisting of rosin powder and alcohol, and used as a binder between expanded vermiculite, which will be described later.

In addition, if the size of the pulverized rosin powder is less than 300 mesh, some of the particles of the rosin powder may be exposed to the surface of the furniture material, causing visually unfavorable problems.If the size of the pulverized rosin powder exceeds 325 mesh, the dispersibility As this decreases, the homogeneity of the first mixture is lowered, and thus the second mixture is not properly liquefied, so that the bonding strength of the rosin powder may decrease, and as a result, the compressive strength of the furniture material may decrease.

When liquefied, such rosin powder is a natural material with excellent adhesion and bonding power, and is harmless to the human body, and is located in the gap between adjacent expanded vermiculite to increase the bonding strength between expanded vermiculite, thereby improving the compressive strength of furniture material that is compressed and molded with high heat. . In addition, since the resin powder is a material having excellent waterproof properties, it can impart excellent waterproof properties to the finished furniture material.

If the content of the rosin powder in the first mixture is less than 50% by weight, the bonding force between the expanded vermiculite is lowered, and thus the compressive strength of the furniture material may be lowered. However, since rosin is a vaporizable material, it is preferable that the content of rosin powder does not exceed 70% by weight in order to maintain the incombustibility of the present invention at a certain level.

In addition, if the content of alcohol in the first mixture is less than 30% by weight, mixing may not be performed properly when the first mixture is blended, so that some of the rosin powder may remain undissolved, thereby reducing homogeneity. In addition, when the alcohol content exceeds 50% by weight, the content of the rosin powder is relatively small, so as described above, the compressive strength of the building material is deteriorated.

The third mixture may be formed by mixing liquid silicate soda and charcoal pulverized with 200 to 325 mesh.

At this time, if the size of the pulverized charcoal is less than 200 mesh, there may be a problem that the charcoal particles are exposed to the surface of the molded furniture material, making it difficult to see visually.If the size of the pulverized charcoal exceeds 325 mesh, liquid sodium silicate It is not mixed properly and some clumps or lumps may occur. Accordingly, the third mixture may not properly fill the space between the hole of the expanded vermiculite and the expanded vermiculite, and as a result, the quality and strength of the furniture material may be deteriorated.

The charcoal is a natural material that is harmless to the human body and is environmentally friendly, has excellent humidity control functions, has excellent antibacterial properties, sterilization properties, and deodorization properties, and can be expected to radiate far-infrared rays.

In addition, such charcoal may be made of a variety of wood as a raw material, preferably may be prepared from a raw material consisting of oak and pine.

In this embodiment, the charcoal is 20 to 50% by weight of the first charcoal powder having an oak as a raw material and a bar-shaped structure, and 50 to 80% by weight of the second charcoal powder having a pine tree as a raw material and having a spherical structure May contain %.

At this time, the second charcoal powder may serve to improve homogeneity when blended with the second mixture by maintaining the viscosity of the second mixture in a thick state. In addition, the second charcoal powder is filled in the gaps provided between the first charcoal powders that are in close contact with each other to increase the density of the third mixture and at the same time serve as a binder to allow the charcoal to be well combined with the liquid sodium silicate. Accordingly, when a third mixture is prepared by composing charcoal with the first charcoal powder and the second charcoal powder as in the present embodiment, as a result, the first charcoal powder and the second charcoal powder having different shapes are combined in an entangled state to compress furniture materials. Strength and workability can be further improved.

And, as in the present embodiment, when the charcoal is composed of the first charcoal powder and the second charcoal powder, the content of charcoal in the third mixture may be limited to 15 to 25 parts by weight based on 100 parts by weight of liquid silicate soda.

At this time, if the content of the first charcoal powder is less than 20% by weight, the overall strength provided by the charcoal may decrease, and the content of the second charcoal powder is relatively increased. Since it is a weak material, it is preferable to maintain the content of the first charcoal powder at 20% by weight or more in order to maintain the non-flammability of the present embodiment at a certain level.

In addition, when the content of the first charcoal powder exceeds 50% by weight, the homogeneity of the third mixture decreases, and there may be a problem in that compression is not properly performed when molding furniture.

Meanwhile, as another embodiment, the third mixture may further include a third charcoal powder in addition to the first and second charcoal powders, if necessary.

At this time, the third mixture may be prepared by mixing 40 to 80 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda. If the content of charcoal is less than 40 parts by weight, the bonding strength is weakened and the strength of the composition decreases, and the functional characteristics of charcoal such as excellent humidity control function, antibacterial property, sterilization property and deodorization property may not be properly implemented.

In addition, this third mixture is stirred for 2 to 3 hours with 10 to 35% by weight of the first charcoal powder, 25 to 45% by weight of the second charcoal powder, and 20 to 45% by weight of the third charcoal powder based on 100 parts by weight of liquid silicate soda. It can be prepared.

In addition, the third charcoal powder may be formed by burning rice husk in a high temperature vacuum. The rice husk is an eco-friendly material that is inexpensive and has far-infrared radiation, and is harmless to the human body. In addition, the third charcoal powder prepared from rice husk has the advantage of being well mixed with liquid silicate soda serving as an inorganic binder.

Accordingly, the third charcoal powder acts as a curing agent when reacted with liquid sodium silicate, and thus, it may play a role of further improving the non-combustibility of furniture and increasing the strength. If the content of the third charcoal powder is less than 20% by weight, the effect of the third charcoal powder may not be properly realized, and if the content of the third charcoal powder is more than 45% by weight, the bonding strength may be weakened.

In this way, in the eco-friendly non-combustible furniture material including expanded vermiculite according to the present embodiment, the inner body 1 may include 80 to 95% by weight of the second mixture and 5 to 20% by weight of the third mixture based on the total weight. .

The expanded vermiculite contained in the second mixture has a porous structure, and the resin powder of the first mixture has filled some of the spaces between the pores of the expanded vermiculite and the expanded vermiculite. When the second mixture and the third mixture are stirred , While the third mixture fills the remaining spaces in the expanded vermiculite of the second mixture, it is possible to form the inner body 1 of the furniture material having significantly improved compressive strength.

In this case, if the content of the third mixture is less than 5% by weight, some of the empty spaces of the second mixture are not filled, so that the compressive strength of the furniture material to be molded may be lowered.

In addition, if the content of the third mixture is more than 20% by weight, a part of the third mixture remains even after all the empty spaces of the second mixture are filled, resulting in a problem that the homogeneity of the inner body 1 is lowered. In addition, in this case, the content of the liquid sodium silicate increases, making it difficult to uniformly mix the raw material when mixing the raw material, and a problem such as lumping or lumping of some components in the molded interior body 1 may occur. (1) A problem of deteriorating the quality may occur.

Hereinafter, a preferred embodiment of a method for manufacturing an eco-friendly non-combustible furniture material including expanded vermiculite of the present invention will be described with reference to the accompanying drawings.

1 is a flow chart illustrating a method of manufacturing an eco-friendly non-combustible furniture material including expanded vermiculite according to an embodiment of the present invention, FIG. 2 is a photograph showing the expanded vermiculite used in an embodiment of the present invention, and FIG. 3 is Fig. 4 is a picture showing a state before the third charcoal powder used in an embodiment of the present invention is pulverized.

Referring to FIGS. 1 to 4, first, a first step of pulverizing the rosin powder into 300 to 325 mesh, and mixing 50 to 70% by weight of the pulverized rosin powder and 30 to 50% by weight of alcohol may be performed ( S1). At this time, since the alcohol may be vaporized when the mixing temperature of the rosin powder and the alcohol is high, the first step is preferably performed at room temperature.

At this time, if some of the existing liquid sodium silicate is replaced with rosin powder, the problem of lowering the flowability of the liquid sodium silicate is minimized, so that when mixing raw materials, the blending can be smooth, and deliquescence is eliminated and whitening occurs. This will be greatly reduced.

Accordingly, it is possible to smoothly quantitatively input the molded body when molding the molded body with the fourth mixture to be described later, so that the time during which the molded body is molded can be relatively shortened, and as a result, an effect of improving the manufacturing cost and manufacturing efficiency of the furniture material can be expected.

Next, a second step (S2) of preparing and crushing expanded vermiculite may be performed. In order to proceed with the second step, first, vermiculite is rapidly heated at 1,000 to 1,100°C so that it expands up to about 20 times. Accordingly, the expanded vermiculite as a main component can be prepared by transforming the vermiculite into a porous material having numerous holes.

In this case, when the vermiculite is calcined at a temperature lower than 1,000°C, some of the vermiculite is calcined less, and thus the properties of the expanded vermiculite prepared may be deteriorated. In addition, when the vermiculite is calcined at a temperature higher than 1,100°C, the vermiculite particles may crumble or crumble, and the vermiculite powder may be blown out or part of the vermiculite may be aggregated into a lump when mixing the raw materials.

Then, the expanded vermiculite after the second step is pulverized into particles having a size of 20 to 25 mesh. If the size of the pulverized expanded vermiculite exceeds 25 mesh, mixing may be difficult when mixing the raw materials, which may cause a problem in that the liquefaction of the second mixture is not properly performed in the third step below.

If the second mixture is not properly liquefied, the workability is significantly lowered when preparing the compressed body for manufacturing furniture, so even if the compressed body is processed by pressing the fourth mixture of the present embodiment at high temperature and high pressure, the shape will be as desired by the manufacturer. There may be a problem that it is not formed properly or its quality is significantly deteriorated.

On the other hand, since the second step of expanding vermiculite is a process of heating the vermiculite at a very high temperature for a certain period of time, a purification action in which all foreign substances such as radon and various bacteria in the vermiculite are removed can be performed together. Therefore, the stability of furniture materials can be further increased.

Next, a third step of preparing a liquefied second mixture using the expanded vermiculite pulverized in the second step as a main component proceeds (S2). In this third step, 5 to 30 parts by weight of the first mixture is mixed with respect to 100 parts by weight of expanded vermiculite and stirred at 100° C. for 1 to 2 hours to prepare a second mixture.

At this time, the second mixture may be formed by simultaneously adding the first mixture and expanded vermiculite to a mixer to mix, and then stirring the mixture at 100° C. for 1 to 2 hours and cooling naturally.

At this time, the stirring and natural cooling process of the expanded vermiculite and the first mixture may preferably be repeated five times, which is to increase the viscosity of the second mixture in order to improve workability when manufacturing furniture with a fourth mixture to be described later. This is in order to increase the level to an appropriate maintenance level and also to improve the reactivity with the third mixture described later.

If the process of stirring and natural cooling of the expanded vermiculite and the first mixture is repeated 4 or less times, the viscosity of the second mixture does not rise to a sufficient level of fluidity, and as a result, the reactivity with the third mixture decreases and the strength of the furniture material decreases. Problems may occur.

In addition, the stirring and natural cooling process of the expanded vermiculite and the first mixture is preferably repeated only five times, since there is no significant difference in effect even if repeated six or more times.

Next, the charcoal is pulverized into 200 to 325 mesh, and liquid sodium silicate (sodium silicate) serving as an inorganic binder and the pulverized charcoal are stirred to prepare a third liquefied mixture. (S4). Since the third mixture fills the space between the expanded vermiculite and the expanded vermiculite in the second mixture, it can increase the strength of the molded furniture material.

In addition, in the present embodiment, such charcoal may be made of a variety of wood as a raw material, preferably may be prepared from a raw material consisting of oak and pine.

In this embodiment, the charcoal may include two types of charcoal powder having different textures, and more specifically, the first charcoal powder having a large and elongated bar-shaped structure and a relatively small and rounded sphere-shaped It may include a second charcoal powder having a texture.

The first charcoal powder may be prepared by burning oak wood at 800°C in a vacuum and has a relatively harder strength, and the second charcoal powder may be prepared by burning pine wood at 800°C in a vacuum.

In this embodiment, the charcoal may preferably include 20 to 50% by weight of the first charcoal powder and 50 to 80% by weight of the second charcoal powder.

On the other hand, as another example, the third mixture may be prepared by further mixing and stirring the third charcoal powder. At this time, the third mixture may be prepared by mixing 40 to 80 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda. If the content of charcoal is less than 40 parts by weight, the bonding strength is weakened and the strength of the composition decreases, and the functional characteristics of charcoal such as excellent humidity control function, antibacterial property, sterilization property and deodorization property may not be properly implemented.

The third charcoal powder may be prepared by burning rice husk at 1,500° C. vacuum. The reason why rice husk is preferably used in preparing the third charcoal powder in this embodiment is because the carbon content of rice husk is very high.

In addition, the first to third charcoal powder obtained through the above process is preferably mixed with liquid sodium silicate after passing through five crushing operations. At this time, if the crushing operation is repeated less than five times, the homogeneity of the third mixture may be reduced, and the adhesive strength of the liquid sodium silicate may be decreased.

In addition, as shown in FIG. 5, if necessary, the third mixture prepared as described above may be rolled to a thickness of 2 to 3 mm using a roller in a rolling mill and pressurized in a subsequent process (S10) may be additionally repeated three times.

Through this operation, the first to third charcoal powders included in the third mixture are spread evenly throughout the third mixture, thereby improving adhesion, and as a result, the strength of the composition may be improved.

Next, a fifth step of preparing a fourth mixture by mixing the second mixture and the third mixture is performed (S5). At this time, the fourth mixture may be prepared by stirring 80 to 95% by weight of the second mixture and 5 to 20% by weight of the third mixture for 2 to 3 hours based on the total weight of the fourth mixture.

The expanded vermiculite contained in the second mixture has a porous structure, and the resin powder of the first mixture has filled some of the spaces between the pores of the expanded vermiculite and the expanded vermiculite. When the second mixture and the third mixture are stirred , As the third mixture fills the voids between the expanded vermiculite of the second mixture, a fourth mixture having significantly improved compressive strength is formed.

At this time, if the content of the third mixture is less than 5% by weight, a part of the space of the second mixture is not filled, so that the compressive strength of the compressed body and the finished furniture material may decrease.

In addition, if the content of the third mixture is more than 20% by weight, a portion of the third mixture remains even after all the empty spaces of the second mixture are filled, resulting in a problem that the homogeneity of the fourth mixture decreases. In addition, in this case, the content of the liquid soda silicate increases, making it difficult to uniformly mix the raw materials, and problems such as lumping or lumping of some components in the fourth mixture may occur. Problems can arise.

Next, a mold having a shape corresponding to the shape of the furniture material to be produced is prepared, and the fourth mixture is put into a mold heated at 180 to 230°C, and pressed for 5 minutes with a high pressure press of 2,000 to 2,300 tons to obtain a desired shape. Proceeds to the sixth step of providing the compressed body (S6). In this case, the mold may have various shapes and thicknesses according to the furniture material.

In addition, in this embodiment, instead of preparing the fourth mixture, which is the final product, by mixing all the components at the same time, the first mixture is prepared by mixing the rosin powder and alcohol to make the rosin powder homogeneous. The expanded vermiculite is mixed to prepare a liquefied second mixture to homogenize the expanded vermiculite, and a third liquefied mixture in which the charcoal becomes homogeneous is prepared by mixing liquid sodium silicate and finely ground charcoal. 2 By mixing the mixture, charcoal is filled between the expanded vermiculite, and the fourth mixture is homogeneous and has excellent bonding strength between the components, so that a fourth mixture capable of providing high strength can be prepared. Therefore, while taking all the beneficial effects of each component, it is possible to minimize problems that may occur while each component is mixed.

In this way, when the compressed body is pressed at high heat and high pressure for 5 minutes, heat is evenly transferred to the entire fourth mixture inside the mold, and the particles of various components contained in the fourth mixture are evenly bonded together by strong pressure and high heat, resulting in excellent strength. And, it is possible to manufacture furniture materials that have various functional characteristics such as non-combustibility and are evenly realized as a whole.

In particular, charcoal fills the space formed in the expanded vermiculite, and soda silicate and rosin powder are combined to fill the gap, so that it is possible to manufacture eco-friendly non-combustible furniture material that is lightweight and has superior strength and non-flammability than existing furniture materials.

At this time, if the pressing time with high heat is less than 5 minutes, heat cannot be transferred evenly inside the mold, and the particles of various components included in the fourth mixture do not react properly, so that the shape of the furniture material does not appear properly or the characteristics of the furniture material partially deteriorate. A defective product may occur.

Next, a seventh step of natural cooling for 72 hours or more by demolding the compressed body from the mold is performed (S7). If the natural cooling time of the seventh step is less than 72 hours, the strength of the compressed body may decrease. In addition, when the temperature for cooling the compressed body is significantly different from room temperature, defects such as cracks may occur during the drying process of the compressed body.

Next, the eighth step of removing the surface foreign matter of the compressed body using sandpaper or chamfering is performed (S80). In the present invention, such a foreign material removal process is not limited to sandpaper or chamfering, and may be performed through various other methods.

Next, a ninth step of coating the surface of the compressed body with an inorganic binder is performed (S9). To this end, an inorganic binder is first coated on the upper and side surfaces of the compact, dried, and then turned over and secondarily coated with an inorganic binder on the lower and side surfaces of the compact and dried. Furniture materials can be completed.

The eco-friendly non-combustible furniture material configured as described above can be applied to furniture for various purposes, such as desk tops and wardrobes having a thickness of 15, 18, 23 and 28 mm.

On the other hand, the furniture material of the present invention can be modified in various forms other than those described above, and all modified embodiments should also be construed as belonging to the scope of the present invention, unless departing from the technical spirit of the present invention.

Explanation of sign

S1: Prepare the first mixture

S2: Prepare and crush expanded vermiculite

S3: second mixture preparation

S4: prepare third mixture

S5: Prepare the fourth mixture

S6: Step of preparing a compressing agent

S7: cooling the compressed body

S8: Step of removing foreign substances from the compressed body

S9: coating the surface of the compressed body

S10: Rolling and pressurizing the third mixture

1: inner body

2: coating layer

10: Furniture materials

Claims

A second mixture formed by mixing the expanded vermiculite pulverized into 20 to 25 mesh and 5 to 30 parts by weight of the first mixture based on 100 parts by weight of the expanded vermiculite; And a third mixture formed by mixing liquid silicate soda and charcoal pulverized with 200 to 325 mesh. Is made of,

The first mixture includes 50 to 70% by weight of rosin powder pulverized with 300 to 325 mesh based on the total weight, and 30 to 50% by weight of alcohol,

Eco-friendly non-combustible furniture material comprising expanded vermiculite, comprising 80 to 95% by weight of the second mixture and 5 to 20% by weight of the third mixture based on the total weight.
The method of claim 1, wherein the third mixture comprises 15 to 25 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda,

The charcoal contains 20 to 50% by weight of the first charcoal powder having an oak as a raw material and a bar-shaped structure, and 50 to 80% by weight of the second charcoal powder having a pine tree as a raw material and a spherical structure Eco-friendly non-combustible furniture material containing expanded vermiculite characterized by.
The method of claim 1, wherein the third mixture comprises 40 to 80 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda,

The charcoal includes 10 to 35% by weight of the first charcoal powder having a structure in the form of a rod and using oak as a raw material, 25 to 45% by weight of the second charcoal powder having a structure in the form of a sphere and using pine Eco-friendly non-combustible furniture material comprising expanded vermiculite, characterized in that it contains 20 to 45% by weight of the third charcoal powder formed by burning in a high temperature vacuum state.
A first step of preparing a first mixture by mixing 50 to 70% by weight of rosin powder pulverized into 300 to 325 mesh and 30 to 50% by weight of alcohol at room temperature;

A second step of heating vermiculite at 1,000 to 1,100°C to prepare expanded vermiculite, and pulverizing the expanded vermiculite into 20 to 25 mesh;

A third step of mixing 5 to 30 parts by weight of the first mixture with respect to 100 parts by weight of pulverized expanded vermiculite and stirring at 100° C. to prepare a liquefied second mixture;

A fourth step of preparing a liquefied third mixture by mixing liquid silicate soda and charcoal pulverized with 200 to 325 mesh based on 100 parts by weight of the liquid silicate soda and stirring for 2 to 3 hours;

A fifth step of preparing a fourth mixture by stirring 80 to 95% by weight of the second mixture and 5 to 20% by weight of the third mixture for 2 to 3 hours based on the total weight of the fourth mixture;

A sixth step of preparing a compressed body having a desired shape by pressing the fourth mixture at 180 to 230°C for 5 minutes with a hydraulic press having a pressure of 2,000 to 2,300 tons;

A seventh step of naturally cooling the compressed body by demolding for 72 hours or more;

An eighth step of removing foreign substances on the surface of the compressed body; And

A ninth step of coating an inorganic binder on the surface of the compressed body; A method of manufacturing an eco-friendly non-combustible furniture material comprising expanded vermiculite comprising a.
The method of claim 4,

In the fourth step, the third mixture is prepared by mixing 15 to 25 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda,

The charcoal is 20 to 50% by weight of the first charcoal powder having a bar-shaped structure prepared by burning oak at 800°C in a vacuum, and a second charcoal having a spherical structure prepared by burning pine trees at 800°C in a vacuum. A method for producing an eco-friendly non-combustible furniture material comprising expanded vermiculite, characterized in that it contains 50 to 80% by weight of powder.
The method of claim 4,

In the fourth step, the third mixture is prepared by mixing 40 to 80 parts by weight of charcoal based on 100 parts by weight of liquid silicate soda,

The charcoal is 10 to 35% by weight of a first charcoal powder having a rod-shaped structure prepared by burning oak at 800°C in a vacuum, and a second charcoal powder having a sphere-shaped structure prepared by burning pine trees at 800°C in a vacuum 25 to 45% by weight, and 20 to 45% by weight of third charcoal powder prepared by burning rice husks at 1,500°C in vacuum; A method of manufacturing an eco-friendly non-combustible furniture material comprising expanded vermiculite, comprising: a.