KR102103120B1 - Environment-friendly nonflammable chair including expanded vermiculite and method of manufacturing the same - Google Patents

Abstract

Provided are an eco-friendly non-combustible chair containing expanded vermiculite, and a manufacturing method thereof. The eco-friendly non-combustible chair is harmless to the human body by using an eco-friendly composition, and can provide a humidity control function, antibacterial functions, and deodorizing functions. In addition, the eco-friendly non-combustible chair has excellent compressive strength while having non-combustible functions, and is easy to handle due to light weight relative to the volume.

Description

Environment-friendly nonflammable chair including expanded vermiculite and method of manufacturing the same}

The present invention relates to an eco-friendly non-combustible chair comprising an expanded vermiculite and a method for manufacturing the same, and more specifically, it is eco-friendly, harmless to the human body, and provides a humidity control function, antimicrobial property, and deodorizing property, so that there may be parts that repeatedly contact the human body. It relates to an environment-friendly non-combustible chair and a method of manufacturing the same, which can contribute to minimizing skin irritation in the area, improving surrounding air quality, and creating a pleasant environment.

The chair used when a person sits can be made of various materials. Recently, it is cheaper than solid wood, so it is processed into veneer, sawdust, fibrous, and adhered to plywood, particleboard, and fiberboard. The demand for wood adhesive products is steadily increasing, and these wood board products are not only mixed with formaldehyde-based adhesives harmful to the human body, but also immersed in formalin for antiseptic treatment, and it was common to manufacture chairs using the finished wood. .

However, a large amount of harmful substances such as toluene, xylene, and ethylbenzene are discharged from these woods, and accordingly, various diseases such as atopic dermatitis and rhinitis may occur.

As an environmentally friendly furniture, there are limitations in making wood remain a breathing material while eliminating harmful substances emitted from the paint itself while compensating for defects of wood to reduce the emission of volatile organic compounds (VOCs). have.

In order to solve the above disadvantages, recently, a functional paint, which is a paint applied to the surface of a chair, is applied, but the functional paint has a disadvantage in that its function is halved after drying.

In addition, these processed wood is very vulnerable to fire, and is manufactured by including various types of non-combustible compositions in order to solve the problem related to incombustibility.

However, the conventional non-combustible composition uses a non-flammable or flame retardant made of various types of chemicals to lower the price, and such chemicals include various allergic diseases or respiratory diseases including formalin, toluene, and volatile organic substances. Not only does it cause various problems that are harmful to the human body, but also causes environmental pollution when discarded.

Domestic Registered Patent Publication No. 10-0695910 Domestic Registered Patent Publication No. 10-1213988

The present invention has been devised to solve the problems of the prior art, and is environmentally friendly and harmless to the human body, and provides humidity control, antibacterial and deodorant properties. The objective is to provide an environment-friendly non-combustible chair and a method for manufacturing the same that can contribute to minimizing, improving the surrounding air quality and creating a pleasant environment.

The chair according to the present invention is a means for achieving the above object, and heated at 1,000 to 1,100 ° C., and then pulverized with 20 to 25 mesh, mixed with 5 to 30 parts by weight of the first mixture with respect to 100 parts by weight of the expanded vermiculite A second mixture formed by; And a third mixture formed by mixing liquid silicate soda and charcoal crushed with 200 to 325 mesh. Wherein, the first mixture, 50 to 70% by weight of the pulverized powder to 300 to 325 mesh relative to the total weight, and 30 to 50% by weight of alcohol, the second mixture is expanded with the first mixture After the vermiculite is simultaneously added to the mixer and mixed, the mixture is stirred for 1 to 2 hours at 100 ° C., and the process of natural cooling is repeated 5 times, and the third mixture is pressurized in a rolling mill to be 2 to 3 mm thick. It is formed by repeating the operation three times, 80 to 95% by weight of the second mixture and 5 to 20% by weight of the third mixture are stirred for 2 to 3 hours to form a fourth mixture, and the fourth mixture is 2,000 to 2,000 Pressed for 2 minutes at a pressure of 2,300 ton at 180 to 230 ° C for 5 minutes to form a compressed body, and the compressed body is respectively assembled by being pressed with a rod-shaped support compression member and a plate-shaped plate compression member, The first group is characterized in that the mixture is pine resin powder and the alcohol consisting of a mixture at room temperature.

In addition, the third mixture contains 15 to 25 parts by weight of charcoal with respect to 100 parts by weight of liquid silicate soda, and the charcoal is 20 to 50% by weight of a first charcoal powder made of oak and having a rod-like structure, and It is characterized in that it comprises 50 to 80% by weight of the second charcoal powder having a spherical shape and using pine as a raw material.

In addition, the third mixture contains 40 to 80 parts by weight of charcoal with respect to 100 parts by weight of liquid silicate soda, and the charcoal comprises 10 to 35% by weight of first charcoal powder made of oak and having a rod-like structure, It is characterized in that it comprises 25 to 45% by weight of the second charcoal powder having pine-like structure 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.

In addition, a first step of preparing a first mixture by mixing 50 to 70% by weight of rosin powder crushed with 300 to 325 mesh and 30 to 50% by weight of alcohol at room temperature; A second step of heating the vermiculite at 1,000 to 1,100 ° C to prepare an expanded vermiculite, and grinding 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 the expanded sintered vermiculite and stirring at 100 ° C. to prepare a second liquefied mixture; A fourth step of mixing liquid silicate soda and charcoal crushed with 200 to 325 mesh with respect to 100 parts by weight of liquid silicate soda and stirring for 2 to 3 hours to prepare a liquefied third mixture; 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 relative to the total weight of the fourth mixture; A sixth step of pressing the fourth mixture at a pressure of 2,000 to 2,300 tons at a pressure of 180 to 230 ° C. for 5 minutes to provide a compact composed of a rod-shaped support compression member and a plate-shaped plate compression member; A seventh step of demolding the compact to naturally cool it for at least 72 hours; An eighth step of removing foreign substances on the surface of the compact; A ninth step of first coating an inorganic binder on the top and side surfaces of the compact, drying it, and then turning it upside down to coat and dry the inorganic binder on the bottom and side surfaces of the compact; And a tenth step of assembling the support compression member and the plate compression member to construct a chair-shaped structure.

In addition, in the fourth step, the third mixture is prepared by mixing 15 to 25 parts by weight of charcoal with respect to 100 parts by weight of liquid silicate soda, and the charcoal has a rod-shaped structure provided by burning oak at 800 ° C. under vacuum. It is characterized in that it comprises 20 to 50% by weight of the first charcoal powder, and 50 to 80% by weight of the second charcoal powder having a spherical structure provided by burning pine at 800 ° C. under vacuum.

In addition, in the fourth step, the third mixture is prepared by mixing 40 to 80 parts by weight of charcoal with respect to 100 parts by weight of liquid silicate soda, and the charcoal has a rod-shaped structure provided by burning oak at 800 ° C. under vacuum. 10 to 35% by weight of the first charcoal powder, 25 to 45% by weight of the second charcoal powder having a spherical structure prepared by burning pines at 800 ° C vacuum, and third charcoal provided by burning rice husks at 1,500 ° C vacuum 20 to 45% by weight of the powder; characterized in that it comprises a.

According to the present invention, an eco-friendly composition such as expanded vermiculite, charcoal and liquid silicate soda that is harmless to the human body is used, and various functional properties such as humidity control function, antibacterial and deodorant properties can be provided by expanded vermiculite and charcoal, and It can prevent various allergic diseases or respiratory diseases arising from a chair directly or indirectly.

In addition, since the rosin powder is filled with a gap between the expanded vermiculite and charcoal in a state in which charcoal is combined with the expanded vermiculite made of porous material, the chair is molded so that the manufactured chair has light weight and non-combustibility compared to existing non-combustible materials. It has the effect of increasing the added value of the chair.

In addition, the eco-friendly non-combustible chair manufactured by this embodiment can be utilized again as a material for other furniture materials by crushing and liquefying it upon disposal, which is advantageous for recycling of resources and also for environmental protection.

1 is a flowchart illustrating a method of manufacturing an eco-friendly non-combustible chair including an expanded vermiculite according to an embodiment of the present invention.
2 is a photograph showing an 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 crushed.
5 is a flowchart illustrating a method of manufacturing an eco-friendly chair including an expanded vermiculite according to another embodiment of the present invention.
6 is a perspective view schematically showing a chair partially cut away according to an embodiment of the present invention.
7 to 9 are views showing a schematic appearance of a chair according to an embodiment of the present invention.

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, but is defined by what is described in the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. have.

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

Further, 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 5 to 30 parts by weight of the first mixture with respect to 100 parts by weight of the expanded vermiculite and the expanded vermiculite.

At this time, when the content of the first mixture is less than 5 parts by weight, the strength of the chair may be lowered because the binding force of the rosin powder is insufficient. In addition, when the content of the expanded vermiculite is relatively high, when the second mixture is prepared, liquefaction may not be properly performed, or a part of the expanded vermiculite may be locally aggregated, resulting in a problem that the homogeneity of the second mixture is deteriorated. This problem of homogeneity may consequently act as a cause of deteriorating the compressive strength of the chair.

In addition, when the content of the first mixture exceeds 30 parts by weight, the content of the 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. When the size of the pulverized expanded vermiculite is less than 20 mesh, it may cause a problem that the vermiculite particles are exposed to the surface of the molded chair, which is not visually pleasing. Mixing is difficult, and the liquefaction of the second mixture is not properly performed, which may cause manufacturing problems.

In addition, the expanded vermiculite is lighter than volume, and is a natural material that is harmless to the human body and environmentally friendly. In addition, the expanded vermiculite has excellent non-combustibility of the first grade, and is very effective when used as a chair mainly installed indoors because of its porous structure and good absorption ability.

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

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

In order to solve this problem, in this embodiment, some of the liquid silicate soda can be used as a binder between expanded vermiculites described later by replacing a first mixture of rosin powder and alcohol.

In addition, when the size of the pulverized rosin powder is less than 300 mesh, some of the particles of the rosin powder are exposed to the surface of the chair, which may cause visually bad problems, and if the size of the pulverized rosin powder exceeds 325 mesh, dispersibility As this decreases, the homogeneity of the first mixture is lowered, and thus the liquefaction of the second mixture is not properly performed, so that the binding force of the rosin powder may be lowered, and as a result, the compressive strength of the chair may be lowered.

When the resin powder is liquefied, it is a natural material having excellent adhesion and bonding strength. It is harmless to the human body and is located in a gap between adjacent expansive vermiculites, thereby increasing the bonding strength between the expanded vermiculites to improve the compressive strength of the material to be compressed by high heat. . In addition, since the rosin powder is a material having excellent water resistance, it is possible to impart excellent water resistance to the finished chair.

When the content of the rosin powder in the first mixture is less than 50% by weight, the bonding force between the expanded vermiculites is lowered, which may cause a problem that the compressive strength of the chair is 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 the alcohol in the first mixture is less than 30% by weight, mixing of the first mixture may not be properly performed, so that some of the rosin powder may remain unmelted and the homogeneity may deteriorate. In addition, when the content of alcohol exceeds 50% by weight, since the content of the rosin powder is relatively small, there arises a problem that the compressive strength of the building material decreases as described above.

The third mixture may be formed by mixing liquid silicate soda and charcoal crushed into 200 to 325 meshes.

At this time, when the size of the pulverized charcoal is less than 200 mesh, the problem that the charcoal particles are exposed to the surface of the molded chair may be visually unsightly, and if the size of the crushed charcoal exceeds 325 mesh, liquid silicate soda It does not mix properly with and may cause problems such as a part or clumping. 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 chair may deteriorate.

The charcoal is a natural material, harmless to the human body, eco-friendly, has excellent humidity control, has excellent antibacterial, sterilizing and deodorizing properties, and can be expected to emit far infrared rays.

In addition, the charcoal can be made of various wood as a raw material, and preferably can be prepared from raw materials made of oak and pine.

In this embodiment, the charcoal is 20 to 50% by weight of the first charcoal powder having oak-like structure and bar-shaped tissue, and 50 to 80% of the second charcoal powder having pine-like structure and spherical structure. %.

At this time, the second charcoal powder may serve to improve the homogeneity when blending 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 a gap provided between the first charcoal powders that are in close contact with each other, thereby increasing the density of the third mixture and at the same time, acting as a binder for the charcoal to be well combined with the liquid silicate soda. Accordingly, when a third mixture is prepared by constructing charcoal from 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 a entangled state to compress the chair. Strength and processability can be further improved.

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

At this time, when the content of the first charcoal powder is less than 20% by weight, the strength provided by the overall charcoal may decrease and the content of the second charcoal powder increases relatively. 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 incombustibility 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 is lowered, which may cause a problem that compression is not properly performed when forming a chair.

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 with respect to 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 is lowered, and excellent humidity control, antibacterial, sterilizing, and deodorizing properties that are functional properties of charcoal may not be properly implemented.

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

In addition, the third charcoal powder may be formed by burning chaff in a high-temperature vacuum. The chaff is an eco-friendly material that is inexpensive and has far-infrared emission ability, and has no harm to the human body. In addition, the third charcoal powder prepared from chaff has an 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 reacting with liquid silicate soda, and thus can further improve the non-combustibility of furniture and increase 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 implemented, and if the content of the third charcoal powder is more than 45% by weight, the bonding strength may be weakened.

As described above, the inner body 1 in the eco-friendly non-combustible chair including the expanded vermiculite according to the present embodiment 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 rosin powder of the first mixture fills some of the spaces between the hole of the expanded vermiculite and the expanded vermiculite. When the second mixture and the third mixture are stirred, , The third mixture may fill the remaining spaces in the expanded vermiculite of the second mixture, thereby forming the inner body 1 of the chair with significantly improved compressive strength.

At this time, if the content of the third mixture is less than 5% by weight, the compressive strength of the chair to be molded may be deteriorated because some of the empty space of the second mixture is not filled.

In addition, when the content of the third mixture is more than 20% by weight, even if all the empty spaces of the second mixture are filled, a part of the third mixture remains, which may cause a problem that the homogeneity of the inner body 1 is deteriorated. In addition, in this case, as the content of the liquid silicate soda increases, it becomes difficult to uniformly mix the raw materials, and some components in the molded inner body 1 may clump on one side or clump, so the inner body The problem that the quality of (1) deteriorates may occur.

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

1 is a flow chart showing a method of manufacturing an eco-friendly non-combustible chair including an expanded vermiculite according to an embodiment of the present invention, FIG. 2 is a photograph showing an expanded vermiculite used in an embodiment of the present invention, and FIG. 3 is The picture showing the rosin powder used in one embodiment of the present invention, Figure 4 is a picture showing the state before the third charcoal powder used in an embodiment of the present invention is crushed.

Referring to FIGS. 1 to 4, first, the first step of crushing the rosin powder into 300 to 325 mesh and mixing 50 to 70 wt% of the crushed rosin powder and 30 to 50 wt% of alcohol may be performed ( S1). At this time, if the mixing temperature of the rosin powder and alcohol is high, the alcohol may be vaporized, so the first step is preferably performed at room temperature.

At this time, if a part of the existing liquid silicate soda is used by replacing with rosin powder, the problem of deterioration in the flowability of the liquid silicate soda can be minimized to facilitate mixing when mixing raw materials, and deliquescence is resolved to whiten. This will be greatly reduced.

Accordingly, it is possible to smoothly inject quantitatively when molding the molded body with a fourth mixture, which will be described later, so that the time for molding the molded body is relatively shortened, and consequently, an effect of improving the production cost and production efficiency of the chair can be expected.

Next, the second step (S2) of preparing and grinding the 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 to expand to about 20 times. Accordingly, the vermiculite can be transformed into a porous material having a large number of holes, thereby providing an expanded vermiculite as a main component.

At this time, if the calcined vermiculite is fired at a temperature lower than 1,000 ° C, a part of the vermiculite may be less calcined, resulting in a problem of deterioration in the properties of the expanded vermiculite. In addition, if the calcined vermiculite is fired at a temperature higher than 1,100 ° C, the vermiculite particles may flutter or crumble, and when mixing the raw materials, vermiculite powder may be blown or a part may be agglomerated.

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 that the liquefaction of the second mixture is not properly performed in the third step.

If the liquid is not properly liquefied when the second mixture is prepared, the workability is significantly lowered when the compressed body for manufacturing the chair is prepared. Problems may occur that are not properly formed or the quality is significantly deteriorated.

Meanwhile, since the second step of expanding the vermiculite is a process of heating the vermiculite at a very high temperature for a certain period of time, a purification action in which foreign substances such as radon and various bacteria in the vermiculite are removed in this process can be performed together. It can increase the stability of the chair.

Next, a third step of preparing a second liquefied mixture using the expanded vermiculite crushed in the second step as a main component is performed (S2). This third step is to prepare a second mixture by mixing 5 to 30 parts by weight of the first mixture with respect to 100 parts by weight of the expanded vermiculite and stirring at 100 ° C. for 1 to 2 hours.

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

At this time, the stirring and natural cooling process of the expanded vermiculite and the first mixture can be preferably repeated 5 times, which improves the viscosity of the second mixture to improve the workability when manufacturing a chair with the fourth mixture, which will be described later. This is to increase the level to be properly maintained and 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 four times or less, the viscosity of the second mixture does not rise to a sufficient level, and as a result, reactivity with the third mixture decreases and the strength of the chair decreases. Problems can occur.

In addition, the agitation and natural cooling process of the expanded vermiculite and the first mixture is preferably repeated only 5 times because the difference in effect is not large even if repeated 6 or more times.

Next, the fourth step of crushing the charcoal into 200 to 325 mesh, and stirring the pulverized charcoal with liquid sodium silicate (sodium silicate) serving as an inorganic binder and stirring the pulverized charcoal to proceed to the fourth step. (S4). Since the third mixture fills the space between the hole of the expanded vermiculite and the expanded vermiculite in the second mixture, it can act to increase the strength of the molded chair.

In addition, in the present embodiment, such charcoal may be made of various trees as raw materials, and may be preferably prepared from raw materials made of oak and pine.

In this embodiment, the charcoal may include two types of charcoal powder having different tissues, and more specifically, a first charcoal powder having a large and elongated rod-shaped tissue and a relatively small and round spherical shape. It may include a second charcoal powder having a tissue.

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

Meanwhile, 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 with respect to 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 is lowered, and excellent humidity control, antibacterial, sterilizing, and deodorizing properties that are functional properties of charcoal may not be properly implemented.

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

In addition, the first to third charcoal powders obtained through the above process are preferably mixed with liquid silicate soda after 5 crushing operations. At this time, if the crushing operation is repeated less than 5 times, a problem may occur in that the homogeneity of the third mixture is lowered and the adhesion of liquid silicate soda is also lowered.

In addition, as shown in FIG. 5, the third mixture prepared as described above may be repeatedly repeated about three times (S10) for rolling and pressing to a thickness of 2 to 3 mm using a roller in a rolling mill as a post process.

Through this operation, as the first to third charcoal powders contained in the third mixture are spread evenly over the entire third mixture, adhesion is improved, and as a result, the strength of the composition can 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 rosin powder of the first mixture fills some of the spaces between the hole of the expanded vermiculite and the expanded vermiculite. When the second mixture and the third mixture are stirred, , The third mixture fills the empty spaces between the expanded vermiculites of the second mixture, thereby forming a fourth mixture with greatly improved compressive strength.

At this time, when 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 compact and the finished chair may be deteriorated.

In addition, when the content of the third mixture is more than 20% by weight, even if all the empty spaces of the second mixture are filled, a part of the third mixture remains, which may cause a problem that the homogeneity of the fourth mixture is lowered. In addition, in this case, as the content of liquid silicate soda increases, it becomes difficult to mix uniformly when mixing raw materials, and problems such as agglomeration or lumping of some components in the fourth mixture may occur, resulting in deterioration in the quality of the compact. Problems may arise.

Next, a mold having a shape corresponding to the shape of the chair to be produced is prepared, the fourth mixture is introduced into a mold heated to 180 to 230 ° C., and pressed for 5 minutes with a high pressure press of 2,000 to 2,300 tons for 5 minutes. Proceeding to the sixth step of providing a compact (S6). At this time, the mold may be made of various shapes and thicknesses depending on the chair.

In one example, the compression body is configured by pressing each with a rod-shaped support compression member 10 'and a plate-shaped plate compression member 10', and these can be assembled to each other to form a chair. The plate compression member 10 ″ may be used as a seat or a backrest of the chair 10, and the support compression member 10 ′ may serve as a leg of the chair 10.

The support compression member 10 'and the plate compression member 10' 'are assembled with each other in a tenth step (S11), which will be described later, to form a chair.

On the other hand, in the present embodiment, not all the components are mixed at the same time to prepare the final product, the fourth mixture at once, but by mixing the rosin powder and alcohol, the rosin powder homogeneously prepares the first mixture, and the first mixture The expanded vermiculite is mixed to prepare a second mixture in which the expanded vermiculite is homogenized, and a liquid liquefied soda and finely crushed charcoal are mixed to prepare a liquidified third mixture in which the charcoal is homogenized, and the third mixture is prepared. 2 By mixing the mixture, charcoal is filled in between the expanded vermiculites and is homogeneous, and a fourth mixture capable of providing high strength by providing excellent bonding strength between components can be provided. Therefore, it is possible to minimize the problems that can occur while mixing each component while taking all the beneficial effects of each component.

When the compressed body is pressed at high temperature and high pressure for 5 minutes as described above, heat is evenly transmitted to the entire fourth mixture from inside the mold, and particles of various components included in the fourth mixture are evenly combined by strong pressure and high temperature, thereby providing excellent strength. And it is possible to manufacture a chair in which various functional properties such as non-combustibility are uniformly implemented as a whole.

In particular, the space formed in the expanded vermiculite is filled with charcoal and soda silicate and rosin powder are combined to fill the gap, thereby making it possible to manufacture an eco-friendly non-combustible chair that is lightweight and has superior strength and non-combustibility than conventional chairs.

At this time, if the time for pressing with high heat is less than 5 minutes, heat is not evenly transmitted from inside the mold, and particles of various components included in the fourth mixture do not react properly, so the shape of the chair does not appear properly or the characteristics of the chair partially deteriorate. Defective products can be caused.

Next, a seventh step in which the compressed body is demolded from the mold and naturally cooled for 72 hours or more is performed (S7). If the natural cooling time of the seventh step is less than 72 hours, the strength of the compact may be lowered. In addition, when the temperature for cooling the compressed body is significantly different from room temperature, defects such as cracks may occur in the process of drying the compressed body.

Next, the eighth step of removing the surface foreign matter of the compact using a sandpaper or a cotton puff (S80). In the present invention, the process of removing such foreign substances is not limited to sandpaper or cotton wool, and may be performed through various other methods.

Next, the ninth step of coating the surface of the compact with an inorganic binder proceeds (S9). To this end, the inorganic binder is first coated on the top and sides of the compact and dried, then turned over and the inorganic binder is coated and dried on the bottom and sides of the compact.

Next, a tenth step (S11) of constructing a general chair-shaped structure by performing assembling of the support compression member 10 'and the plate compression member 10' 'where the binder is dried is performed.

The chair 10 may be configured by combining only the support compression member 10 'and the plate compression member 10' as shown in FIG. 7, but the plate compression member 10 'as shown in FIG. It may additionally include a joint member (10`` ') connecting each other.

In addition, of course, as shown in FIG. 9, various types of compressed bodies may be further included for the design of the ergonomic chair.

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

S1: Preparing the first mixture
S2: Preparation and crushing of expanded vermiculite
S3: Preparing the second mixture
S4: Preparation of the third mixture
S5: prepare a fourth mixture
S6: Step of preparing a compress
S7: Cooling the compact
S8: step of removing foreign matter from the compact
S9: coating the surface of the compact
S10: Rolling and pressing the third mixture
1: inner body
2: Coating layer
10: chair

Claims (3)

A second mixture formed by mixing 5 to 30 parts by weight of the first mixture with respect to 100 parts by weight of the expanded vermiculite crushed after heating; And
A third mixture formed by mixing liquid silicate soda and ground charcoal; It consists of,
The first mixture, 50 to 70% by weight of the pulverized rosin powder relative to the total weight, and 30 to 50% by weight of alcohol,
The second mixture is formed by simultaneously introducing and mixing the first mixture and the expanded vermiculite into a mixer, and then repeating the mixture for 1 to 2 hours at 100 ° C. for 1 to 2 hours and naturally cooling it, 5 times.
The third mixture is formed by repeating the pressing operation three times in the rolling mill,
80 to 95% by weight of the second mixture and 5 to 20% by weight of the third mixture are stirred to form a fourth mixture,
The fourth mixture is pressed into a hydraulic press to form a compressed body, and the compressed body is pressed into a rod-shaped support compression member and a plate-shaped plate compression member, respectively, to be assembled together.
The first mixture is composed of the mixture of the rosin powder and alcohol at room temperature,
The third mixture contains 40 to 80 parts by weight of charcoal with respect to 100 parts by weight of liquid silicate soda,
The charcoal is 10 to 35% by weight of the first charcoal powder having oak-like structure and oak, and 25 to 45% by weight of the second charcoal powder having pine-like structure and spherical structure, and chaff. Eco-friendly non-combustible chair comprising an 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. delete A first step of preparing a first mixture by mixing pulverized rosin powder 50 to 70 wt% and alcohol 30 to 50 wt% at room temperature;
A second step of heating the vermiculite to prepare an expanded vermiculite, and crushing the expanded vermiculite;
A third step of mixing 5 to 30 parts by weight of the first mixture with respect to 100 parts by weight of the expanded sintered vermiculite and stirring at 100 ° C. to prepare a second liquefied mixture;
A fourth step of mixing a liquid silicate soda with 40 to 80 parts by weight of charcoal crushed with 200 to 325 mesh and stirring for 2 to 3 hours with respect to 100 parts by weight of the liquid silicate soda;
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 relative to the total weight of the fourth mixture;
A sixth step of pressing the fourth mixture at 180 to 230 ° C. for 5 minutes with a hydraulic press to provide a compression body composed of a rod-shaped support compression member and a plate-shaped plate compression member;
A seventh step of demolding the compact to naturally cool it for at least 72 hours;
An eighth step of removing foreign substances on the surface of the compact;
A ninth step of first coating an inorganic binder on the top and side surfaces of the compact, drying it, and then turning it over and coating and drying the inorganic binder on the bottom and side surfaces of the compact; And
Includes; a tenth step of assembling the support compression member and the plate compression member to build a chair-shaped structure;
In the fourth step
The charcoal is 10 to 35% by weight of the first charcoal powder having oak-like structure and oak, and 25 to 45% by weight of the second charcoal powder having pine-like structure and spherical structure, and chaff. Method for producing an eco-friendly non-combustible chair comprising an 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.

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