KR20230164327A - Manufacturing method for furniture using ceramic clay - Google Patents

Abstract

The present invention relates to a method of manufacturing art furniture using ceramic clay, and relates to a method of manufacturing art furniture using a lightweight artificial ceramic clay composition with improved drying speed and impact resistance.

Description

How to make art furniture using ceramic clay {MANUFACTURING METHOD FOR FURNITURE USING CERAMIC CLAY}

The present invention relates to a method of manufacturing art furniture using ceramic clay, and relates to a method of manufacturing art furniture using a lightweight artificial ceramic clay composition with improved drying speed and impact resistance.

The furniture market has been shrinking due to rising raw material prices, and the furniture markets in the construction, automobile, and hotel sectors have been locked down due to the coronavirus pandemic. However, recently, the furniture market has been recovering and growing due to the growth of the home office market.

While furniture using various materials such as iron plywood and paper pulp is developed and produced overseas, especially in the United States and Europe, the domestic furniture market mainly relies on solid wood, wood plywood, and plastic. The global furniture market is experiencing an increase in public interest in art due to the pandemic. Art furniture and sculpture furniture are becoming high-end trends.

Accordingly, art furniture is being produced using various materials such as metal plywood, optical glass materials, concrete, paper pulp, and polymer clay. In the case of metal plywood furniture and optical glass materials, accessibility is low because general designers and artists have many difficulties in manufacturing them. In the case of concrete art furniture, there is the inconvenience of requiring molding for shaping. It also has the disadvantage of being very heavy. In the case of paper pulp furniture, post-processing such as engraving and printing patterns is not easy.

In the clay field, clay furniture using polymer clay types is being produced. However, existing polymer clay is not easy to knead by hand and is too hard to require the use of a pasta noodle making machine, making it difficult to manufacture and having limitations in expressing colorful designs.

Accordingly, the problem to be solved by the present invention is to provide a method of manufacturing clay furniture that can compensate for the shortcomings of existing art furniture based on lightweight artificial ceramic clay composition technology with improved drying speed and impact resistance.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A method of manufacturing art furniture using an artificial ceramic clay composition to solve the above problem includes the step of attaching the artificial ceramic clay composition to an aggregate and then drying it. The artificial ceramic clay composition includes 15-40 wt% of glass powder; Acrylic resin 10-40 wt%; Silica 10-50 wt%; Surfactant 0.5-8 wt%; Gypsum 1-10 wt%; Talc 1-10 wt%; and the remaining amount of purified water.

The artificial ceramic clay composition according to an embodiment of the present invention to solve the above other problems includes 15-40 wt% of glass powder; Acrylic resin 10-40 wt%; Silica 10-50 wt%; Surfactant 0.5-8 wt%; Gypsum 1-10 wt%; Talc 1-10 wt%; and the remaining amount of purified water.

The artificial ceramic clay composition may satisfy one or more of the following (1) to (3).

(1) Density (after drying at room temperature for 24 hours) (g/cm ³ ): 0.5 or less

(2) Compressive strength (after drying at room temperature for 24 hours) (MPa): 0.1 or more

(3) Compressive strength (after drying at 30°C for 3 hours) (MPa): 0.07 or more

The artificial ceramic clay composition is mixed with 15-40 parts by weight of glass powder; 10-40 parts by weight of acrylic resin; 10-50 parts by weight of silica; 0.5-8 parts by weight of surfactant; 1-10 parts by weight of gypsum; and 1-10 parts by weight of talc.

The artificial ceramic clay sculpture according to an embodiment of the present invention to solve the above other problems may be one in which the artificial ceramic clay composition is dried at room temperature for more than 24 hours or at 30° C. for more than 3 hours after firing.

Specific details of other embodiments are included in the detailed description.

According to embodiments of the present invention, it is possible to provide a method of manufacturing clay furniture that can compensate for the shortcomings of existing art furniture, and to use a ceramic clay material that conforms to trends and has improved durability and post-processing properties compared to existing materials. You can produce art furniture.

Ceramic clay composition is formulated with an optimal composition including glass powder, is light, dries quickly, and has improved impact resistance, water resistance, fire resistance, and insulation, so it is used for arts, crafts, education, construction, medicine, and industrial design. It is very suitable for use in a variety of purposes such as:

Effects according to embodiments of the present invention are not limited to the contents exemplified above, and further various effects are included in the present specification.

Figures 1 to 6 are photographs showing the production of art furniture using an artificial ceramic clay composition according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear with reference to the embodiments described in detail below. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms, and only the embodiments serve to ensure that the disclosure of the present invention is complete, and those skilled in the art It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims.

The terminology used herein is for describing embodiments and is not intended to limit the invention. As used herein, 'and/or' includes each and every combination of one or more of the mentioned items. Additionally, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, 'comprises' and/or 'comprising' does not exclude the presence or addition of one or more other components in addition to the mentioned components. The numerical range indicated using '-' or 'to' indicates a numerical range that includes the values written before and after it as the lower and upper limits, respectively, unless otherwise specified. ‘About’ or ‘approximately’ means a value or numerical range within 20% of the value or numerical range stated thereafter.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

Also, in describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

Hereinafter, embodiments of the present invention will be described in detail.

The manufacturing method of the present invention can create any shape by coating the aggregate with ceramic clay. The reason for using aggregate is to ensure the stability required when making furniture and to increase the efficiency of attaching clay when the framework already exists.

Available aggregates include plastic, metal, Styrofoam, wood, and wire. However, in the case of wood, it is preferable to use wood that is coated to prevent moisture from the clay from being absorbed. If clay is applied to uncoated wood, cracks may occur in the clay when it dries.

The ceramic clay used is the lightweight artificial ceramic clay composition developed above with improved drying speed and impact resistance.

As shown in Figure 1, furniture with a marbled feel can be produced by mixing wet clay with pigment before drying when making furniture. Alternatively, like the checkered chair in Figure 2, the clay can be dried and then painted with paint.

Figure 3 in Figure 2 shows attaching flesh to a wooden frame with ceramic clay. As shown in Figure 4, you can spray a small amount of water on the clay using a spray bottle to make the clay soft, and then use a tool such as a wooden spatula or a rubber spatula to flatten the surface. As shown in Figure 5, a rough surface can be made even by using a sponge soaked in a small amount of water.

Additionally, the surface after drying can be sanded evenly using sandpaper or an electric grinder to create a smooth surface. It is recommended to use sandpaper starting with the coarsest grain and then gradually finer sandpaper. If you add a little water when using sandpaper, sanding will be easier without dust.

When using sandpaper, there are paper sandpaper and sandpaper attached to a sponge. If water is added during sanding, the sandpaper attached to the sponge does not get wet rather than the paper sandpaper that gets wet, so it is easier to use for a long time. It's also thick, so holding it and sanding puts less strain on your finger joints.

Figure 6 in Figure 3 is a completed table of the main process in Figure 1. The time it takes for the clay to completely harden varies depending on the thickness, drying temperature, humidity, etc., but when manufacturing by adding 3-15 cm thick clay to the table at a room temperature of 20 degrees, about 1 day is sufficient for short drying time. . However, in the case of chairs or sofas that require people to sit rather than tables, a longer drying time may be required. As can be seen in Figure 6, three-dimensional furniture can be made with ceramic clay. Figure 7 shows the production of various art furniture, including lamps and stools.

Figures 8 and 9 in Figure 4 are photographs showing the durability of small clay objects.

Figure 10 in Figure 5 shows before application of the clay in Figure 11. Clean the discarded Styrofoam thoroughly, and fill the Styrofoam box with Styrofoam and old clothes, making sure there are no empty spaces. The outside was wrapped once more with vinyl and then applied with ceramic clay.

Figure 12 and Figure 13 in Figure 6 show drawings made with charcoal on clay and decorated with jewelry. This ceramic clay is white, and the surface is not slippery after drying, so designs can be created by mixing various art materials such as pencils, charcoal, colored pencils, and various paints.

The artificial ceramic clay composition according to an embodiment of the present invention described above includes 15-40 wt% of glass powder; Acrylic resin 10-40 wt%; Silica 10-50 wt%; Surfactant 0.5-8 wt%; Gypsum 1-10 wt%; Talc 1-10 wt%; and the remaining amount of purified water. Purified water may preferably contain 10-60 wt%, more preferably 10-40 wt%, and even more preferably 10-30 wt%.

The artificial ceramic clay composition according to another embodiment of the present invention includes 15-40 parts by weight of glass powder; 10-40 parts by weight of acrylic resin; 10-50 parts by weight of silica; 0.5-8 parts by weight of surfactant; 1-10 parts by weight of gypsum; and 1-10 parts by weight of talc. Purified water may contain 10-60 parts by weight, preferably 10-40 parts by weight, and more preferably 10-30 parts by weight.

glass powder

Glass powder is a main component of the artificial ceramic clay composition of the present invention, and can provide low density, excellent insulation performance and spreadability, fast drying time, and flame retardancy.

Glass powder may include one or more of None Akali-Aluminium Silicate Glass, Soda lime Glass, Borosilicate Glass, and Bismuth Silicate Glass. Additionally, the average particle size of the glass powder may be 50-350 mesh.

Glass powder may be a powder composed of glass hollow bodies such as glass bubbles or glass fibers. Closed cells, such as glass hollow bodies, have the advantage that, unlike open cells such as airgel, a conventional ceramic material, their insulation performance does not deteriorate even when mixed with other materials, and they are much cheaper than airgel, making them highly cost competitive.

In addition, the density of glass bubbles is 0.12-0.60 g/cc, which is much lighter than that of talc (2.7 g/cc), another conventional material, so adhesion, spreadability, and agitation can be greatly improved.

In some embodiments, the glass bubble may be one that satisfies one or more of the following (1) to (3), preferably two or more, and more preferably all of the following.

(1) Density: 0.12-0.60 g/cc, preferably 0.4-0.6 g/cc

(2) Impact strength: 200-27,000 psi, preferably 5,000-20,000 psi

(3) Average particle size: 15-65 μm, preferably 33-55 μm

Glass powder may be included in the artificial ceramic clay composition of the present invention in an amount of 15-40 wt%, preferably 20-35 wt%, and more preferably 20-30 wt%. If the content of glass powder is less than the above range, density, insulation performance, flame retardancy, etc. may deteriorate, and if it exceeds the above range, plasticity, compressive strength, etc. may decrease.

Acrylic resin

Acrylic resin can impart excellent plasticity, alkalinity, hardness, corrosion resistance, etc. to the artificial ceramic clay composition of the present invention.

Acrylic resin may be manufactured by polymerizing (meth)acrylate monomer and vinyl monomer. The type of (meth)acrylate monomer is not particularly limited, but examples include N-methylol acrylamide, 2-hydroxypropyl methacrylate, propyl methacrylate, t-butylaminoethyl methacrylate, and dicyclophene. Tenyl oxyethyl methacrylate, acrylic acid dimer, hexanediol diacrylate, t-butyl acrylate, triisopropylsilyl acrylate, benzyl methacrylate, hydroxyethyl methacrylate phthalate, 2-hydroxyethyl methacrylate , trimethylolpropane triacrylate, tripropylene glycol diacrylate, ethyl methacrylate, diacetone acrylamide, isobutyl methacrylate, hydroxyisopropyl methacrylate, isopropyl methacrylate, cyclohexyl methacrylate. , triisopropyl silyl methacrylate, isobornyl acrylate, t-butylcyclohexyl methacrylate, trimethylcyclohexyl methacrylate, acrylonitrile, methyl methacrylate, acrylic acid, t-butyl methacrylate, isobornyl One or more types selected from methacrylate, methacrylonitrile, methacrylic acid, acrylamide, methacrylamide, chlorostyrene, and cyclohexyl vinyl ether can be used.

The type of vinyl monomer is not particularly limited, but examples include styrene, methylstyrene, dimethylstyrene, fluorostyrene, ethoxystyrene, methoxystyrene, phenylene vinyl ketone, vinyl t-butyl benzoate, and vinyl cyclohexanoate. , vinyl acetate, vinyl pyrrolidone, vinyl chloride, vinyl alcohol, acetoxystyrene, t-butylstyrene, and vinyltoluene can be used.

The solid content (NV) of the acrylic resin may be 25 to 55%, for example, 35 to 45%, the glass transition temperature (Tg) may be 70 to 100 ℃, for example, 80 to 90 ℃, and the acid The thickness may be -10 to 10 mgKOH/g, for example -5 to 2 mgKOH/g, and the number average molecular weight may be 10,000 to 50,000 g/mol, for example 25,000 to 35,000 g/mol.

If the glass transition temperature (Tg) of the acrylic resin is less than 70°C, heat resistance and hardness may decrease, and if it exceeds 100°C, chemical resistance and corrosion resistance may decrease. If the acid value of the acrylic resin is less than -10 mgKOH/g, chemical resistance and weather resistance may be reduced, and if it is more than 10 mgKOH/g, chemical resistance and corrosion resistance may be reduced. If the number average molecular weight of the acrylic resin is less than 10,000 g/mol, the appearance and hardness may be reduced, and if it is more than 50,000 g/mol, chemical resistance and corrosion resistance may be reduced.

The acrylic resin may be included in the artificial ceramic clay composition of the present invention in an amount of 10-40 wt%, preferably 15-35 wt%, and more preferably 20-30 wt%. If the content of acrylic resin is less than the above range, miscibility, adhesion, texture, etc. may be weakened, and if it exceeds the above range, insulation performance, density, etc. may be deteriorated.

Surfactants

Surfactants can improve the miscibility, plasticity, etc. of the artificial ceramic clay composition of the present invention. The surfactant may include one or more selected from the group consisting of anionic surfactants, cationic surfactants, and amphoteric surfactants.

In exemplary embodiments, the anionic surfactant may be an alkyl ether sulfate or alkenyl ether sulfate. Specifically, ammonium lauryl sulfate, ammonium laureth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine. Laureth Sulfate, Diethanolamine Lauryl Sulfate, Diethanolamine Laureth Sulfate, Sodium Lauric Monoglyceride Sulfate, Sodium Lauryl Sulfate, Sodium Lauroyl Sarcosinate, Lauryl Sarcosine, Cocoyl Sarcosine, Ammonium Cocoyl Sulfate, Ammonium Lauroyl Sulfate, Sodium Cocoyl Sulfate, Sodium Lauroyl Sulfate, Potassium Cocoyl Sulfate, Potassium Lauryl Sulfate, Monoethanolamine Cocoyl Sulfate, Sodium Tridecyl Benzene Sulfonate, Sodium Dodecyl Benzene It may be a sulfonate, the sodium or potassium salt of sodium pares sulfate, or the sodium or potassium salt of sodium pares ether sulfate.

In an exemplary embodiment, the amphoteric surfactant is amidobetaine, amidosulfobetaine, coco dimethyl carboxymethyl betaine, cocoamidopropyl betaine, cocobetaine, lauryl amidopropyl betaine, oleyl betaine. , Lauryl Dimethyl Carboxymethyl Betaine, Lauryl Dimethyl Alphacarboxyethyl Betaine, Cetyl Dimethyl Carboxymethyl Betaine, Lauryl Bis-(2-Hydroxyethyl) Carboxymethyl Betaine, Stearyl Bis-(2-Hydroxy Propyl) carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, and lauryl bis-(2-hydroxypropyl) alpha-carbox-yetyl betaine, coco dimethyl sulfopropyl betaine, stearyl dimethyl sulfopropyl It may be betaine, lauryl dimethyl sulfoethyl betaine, or lauryl bis-(2-hydroxyethyl) sulfopropyl betaine.

In other exemplary embodiments, the surfactant may be polyoxyethylene, alkylphenylether, polyoxyethylene alkylether, polyoxyethylene, or polystylphenylether.

In one embodiment of the present invention, the surfactant may be a polyalkylene glycol or alkyl polyalkylene glycol ether-based material. Alkyl polyalkylene glycol ethers specifically include methyl polyethylene glycol ether, dimethyl polyethylene glycol ether, ethyl polyethylene glycol ether, diethyl polyethylene glycol ether, propyl polyethylene glycol ether, dipropyl polyethylene glycol ether, methyl polypropylene glycol ether, dimethyl polyethylene glycol ether, It may be methyl polypropylene glycol ether, ethyl polypropylene glycol ether, diethyl polypropylene glycol ether, propyl polypropylene glycol ether, or dipropyl polypropylene glycol ether.

In an exemplary embodiment of the present invention, the surfactant may include alkyl polyethylene glycol ether with 40 mole ethylene oxide. However, embodiments of the present invention are not limited thereto.

The surfactant may be included in the artificial ceramic clay composition of the present invention at 0.5-8 wt%, preferably 1-6 wt%, and more preferably 2-6 wt%. If the surfactant content is less than the above range, miscibility, plasticity, etc. may be weakened, and if it exceeds the above range, compressive strength, etc. may be weakened.

silica

Silica (SiO ₂ ) may affect the compressive strength, density, fire resistance, water resistance, etc. of the artificial ceramic clay composition of the present invention. The average particle size of silica may be 10-250 mesh, but embodiments of the present invention are not limited thereto.

Silica may be included in the artificial ceramic clay composition of the present invention at 10-50 wt%, preferably at 15-40 wt%, and more preferably at 20-35 wt%. If the silica content is less than the above range, compressive strength, fire resistance, etc. may be weakened, and if it exceeds the above range, plasticity, etc. may deteriorate.

plaster, talc

Gypsum and talc may affect the plasticity, drying speed, insulation performance, fire resistance, etc. of the artificial ceramic clay composition of the present invention. Gypsum and/or talc may be included in powder form, in which case the average particle size may be 50-300 mesh, but embodiments of the present invention are not limited thereto.

Gypsum can be used as hemihydrate gypsum (CaSO _4. 1/2H ₂ O), dihydrate gypsum (CaSO _4. 2H ₂ O), or a mixture of these, and can improve insulation performance and soundproofing. Gypsum can be used in the form of gypsum powder, but embodiments of the present invention are not limited thereto.

Gypsum and talc may each be included in the artificial ceramic clay composition of the present invention at 1-10 wt%, preferably 2-8 wt%, and more preferably 3-6 wt%.

Other additives

The artificial ceramic clay composition of the present invention may optionally further include commonly used additives within a range that does not impair its inherent properties depending on the use, purpose, etc. Non-limiting examples of such additives include dispersants, antifoaming agents, defoaming agents, leveling agents, plasticizers, colorants, ultraviolet absorbers, surface conditioners, softeners, adhesion enhancers, wetting agents, or mixtures thereof.

The dispersing agent serves to disperse each material constituting the composition and prevent re-agglomeration by maintaining distance, thereby ensuring uniform physical properties. The dispersant may be a conventional dispersant known in the art. For example, a high molecular weight block copolymer type dispersant may be used.

The defoaming agent plays a role in improving the appearance characteristics of the coating film by suppressing air bubbles, and conventional antifoaming agents known in the art can be used without limitation. For example, a silicone-based or non-silicone-based defoamer can be used, and for example, a polysiloxane type defoamer can be used.

The leveling agent is intended to improve the appearance properties while promoting adhesion within the composition by leveling the coating to ensure a flat and smooth coating. The leveling agent may be any conventional leveling agent known in the art without limitation, and examples include acrylic, silicone, polyester, and amine leveling agents.

Plasticizers play a role in controlling viscosity and improving storage stability. The plasticizer may be any conventional plasticizer known in the art without limitation. For example, an acrylic or polyester plasticizer may be used.

The coloring agent may include conventional body pigments, colored pigments, or mixtures thereof known in the art.

The artificial ceramic clay composition according to the embodiments of the present invention as described above may satisfy one or more of the following (1) to (3), preferably two or more, and more preferably all.

(1) Density (after drying at room temperature for 24 hours) (g/cm ³ ): 0.5 or less, preferably 0.4 or less, more preferably 0.3 or less.

(2) Compressive strength (after drying at room temperature for 24 hours) (MPa): 0.1 or more, preferably 0.15 or more, more preferably 0.2 or more.

(3) Compressive strength (after drying at 30°C for 3 hours) (MPa): 0.07 or more, preferably 0.08 or more, more preferably 0.1 or more.

This artificial ceramic clay composition can be fired into a desired shape by the user and then cured through a drying step to become an artificial ceramic clay sculpture.

The drying step is specifically a step in which the fired artificial ceramic clay composition is dried at room temperature for more than 24 hours (preferably 24-72 hours) or at 30° C. for more than 3 hours (preferably 3-8 hours). You can.

The artificial ceramic clay sculpture includes 15-40 parts by weight of glass powder; 10-40 parts by weight of acrylic resin; 10-50 parts by weight of silica; 0.5-8 parts by weight of surfactant; 1-10 parts by weight of gypsum; and 1-10 parts by weight of talc. Purified water may contain 10-60 parts by weight, preferably 10-40 parts by weight, and more preferably 10-30 parts by weight.

The artificial ceramic clay composition of the present invention as described above is lightweight, has excellent plasticity before drying at par with that of conventional products, and dries quickly, so it can be cured in 24 hours at room temperature or 3 hours at 30°C. In addition, cracks do not occur even when interior materials are inserted, and it is excellent in impact resistance, water resistance, fire resistance, insulation, color mixing, and processability after drying. Therefore, the artificial ceramic clay composition of the present invention can be used not only for art, craft, or education, but also for design in industrial fields (e.g., concept cars, robots, prototypes, etc.), and has excellent thermal insulation performance (condensation performance). It can also replace Styrofoam for pipe freeze prevention that requires water resistance. In addition, because the artificial ceramic clay composition of the present invention is lightweight, when used as a building material such as insulating tile, costs can be reduced, construction is easy, and the risk of injury can be reduced. In addition, because it is light, dries quickly, and contains no toxic substances, it can be used for medical purposes such as casts and splints, and because it has excellent insulation performance and strong fire resistance, it can also be used as a housing for furnaces, stoves, and cooking utensils.

In addition, since the artificial ceramic clay composition of the present invention uses eco-friendly materials with low density, it can reduce the plastic waste problem by replacing Styrofoam buoys used at sea.

Hereinafter, the present invention will be described through preparation examples and experimental examples, but it is obvious that the effect of the present invention is not limited by the following experimental examples.

Manufacturing Example 1

Mix acrylic resin (methacrylic acid resin, PMMA), silica, surfactant (Alkyl polyethylene glycol ether), gypsum, talc, glass powder (None Akali-Aluminium Silicate Glass; 50-350 mesh) and purified water as shown in Table 1 below. An artificial ceramic clay composition was prepared. (Examples 1 to 3)

Example 1 (g) Example 2 (g) Example 3 (g) Acrylic resin 25 25 30 silica 30 25 20 Surfactants 3 5 5 gypsum 5 5 3 Talc 5 5 3 glass powder 20 20 25 Purified water 12 15 14 total amount 100 100 100

Experimental Example 1

The artificial ceramic clay compositions prepared in Examples 1 to 3 were evaluated for the following items. For comparison, commercially available pottery clay (Comparative Example 1), T company clay (Comparative example 2), and D company angel clay (Comparative example 3) were also evaluated. The main ingredients of Comparative Example 1 were confirmed to be natural soil, the main ingredients of Comparative Example 2 were paper pulp, water and thickener, and the main ingredients of Comparative Example 3 were synthetic resin.

- Plasticity: Sensory evaluation was conducted on the ease of firing the clay composition into the desired shape before drying.

- Density: The clay composition was dried at room temperature for 24 hours and then the density was measured.

- Compressive strength (room temperature, dried for 24 hours): The clay composition was dried at room temperature for 24 hours and then the compressive strength was measured. Specifically, a compression jig was mounted on a UTM (universal testing machine) and compressed at a speed of 10 mm/min to measure the force received by the clay composition, and the stress value at 10% deformation was calculated as compressive strength. defined.

- Compressive strength (30°C, 3 hours dry): The clay composition was dried at 30°C for 3 hours and the compressive strength was measured in the same manner as above.

- Compressive strength (room temperature, dried for 72 hours): The clay composition was dried at room temperature for 72 hours and the compressive strength was measured in the same manner as above.

- Cracks: The interior material was inserted into the clay composition, dried at room temperature for 24 hours, and then visually observed to see whether surface cracks occurred.

- Water resistance: Changes were observed after the clay composition was dried at room temperature for 24 hours and left in water for 24 hours.

- Fire resistance: The clay composition was dried at room temperature for 24 hours and then burned with a torch at 1000°C for 10 seconds to evaluate the degree of combustion.

- Condensation performance (insulation performance): After drying the clay composition at room temperature for 24 hours, a condensation performance test was conducted using the LH Specification (32700): 2011 method.

- Heavy metals: Tested according to KS C IEC 62321:2014.

- Quality test: Low-temperature stability, chipping resistance due to initial drying, adhesion strength (standard condition), washing resistance, and impact resistance were tested in accordance with KS F 4715: 2007.

- Processability after drying: After drying the clay composition at room temperature for 24 hours, processability was evaluated when processing with a drill, jigsaw, cutter knife, and sandpaper.

- Impact strength: After drying the clay composition at room temperature for 24 hours, compressive strength was measured in the same manner as above, but the stress value at the time of crack occurrence was defined as impact strength.

The evaluation results of Examples and Comparative Examples were shown in Table 2 and Figures 1 to 5 below. Figures 1 and 2 are photographs showing the excellent plasticity and ease of color mixing of the example and that no cracks occur when inserting the interior material, Figure 3 is a condensation performance test report of the example, Figure 4 is a water resistance test report of the example, and Figure 5 is a report. This is the heavy metal detection test report of the example, Figure 6 is the quality test report of the example, Figure 7 is a photograph showing the excellent flame retardancy (top: combustion test, bottom: combustion product cleaning test) of the example, and Figure 8 is the excellent flame retardancy of the example after drying. This is a photo showing processability.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 plasticity ◎ ◎ ◎ ◎ ◎ ◎ Density (g/cm ³ ) 0.24 0.21 0.25 2 0.98 0.08 Compressive strength (room temperature, dried for 24 hours) (MPa) 0.21 0.24 0.22 0.09 0.16 0.12 Compressive strength (30 ℃, 3 hours dry) (MPa) 0.14 0.11 0.12 0.05 0.07 0.08 Compressive strength (room temperature, dried for 72 hours) (MPa) 0.23 0.26 0.23 0.21 0.19 0.16 crack No cracks No cracks No cracks Crack occurrence Crack occurrence Crack occurrence water resistance No problem No problem No problem dissolved in water dissolved in water dissolved in water fire resistance No problem No problem No problem - - - Condensation performance clear clear clear - - - Heavy metal Pb (mg/kg)
CD (mg/kg)
Hg (mg/kg)
Cr ⁶⁺ (mg/kg) Not detected Not detected Not detected - - - low temperature stability clear clear clear - - - Grinding resistance due to initial drying clear clear clear - - - Adhesion strength (N/mm ² ) 1.3 1.3 1.3 - - - Washing resistance clear clear clear - - - impact resistance clear clear clear - - - Processability after drying ◎ ◎ ◎ △ △ ○ Impact strength (MPa) 0.36 0.41 0.39 0.25 0.29 0.23 ◎: Easy, ○: Average, △: Cost

As shown in Table 2 and Figures 1 to 5, the artificial ceramic clay composition of the present invention has a lower density than commercial clay products, is lightweight, does not generate cracks even when interior materials are inserted, and has water resistance, fire resistance, impact resistance, and condensation. Performance (insulation) was excellent. In addition, the clay composition of the present invention has an appropriate level of hardening after drying, making it easy to be molded into a desired shape when processed with a drill, etc., whereas commercial clay products do not have appropriate hardness or viscosity, so processing is difficult, such as being crushed or broken. In particular, the artificial ceramic clay composition of the present invention has a faster drying rate than commercial clay products, and a significant level of hardening occurred even when dried at room temperature for 24 hours or at 30° C. for 3 hours, whereas commercial clay products dried under the same conditions. Due to insufficient curing, the compressive strength was measured to be low.

Production example 2

In order to evaluate artificial ceramic clay compositions of various compositions, artificial ceramic clay compositions were prepared as shown in Table 3 below.

(Unit: g) Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Acrylic resin 35 35 10 35 35 55 25 silica 40 35 15 0 5 15 30 Surfactants 3 3 3 3 3 2 0 gypsum 5 5 5 5 5 3 5 Talc 5 5 5 5 5 3 5 glass powder 0 5 45 35 35 15 25 Purified water 12 12 17 17 12 7 10 total amount 100 100 100 100 100 100 100

Experimental Example 2

Plasticity, density, compressive strength (room temperature, drying for 24 hours), and cracks were evaluated for the clay compositions of the prepared examples in the same manner as in Experimental Example 1. The evaluation results were as shown in Table 4 below.

Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 plasticity ◎ ◎ ○ ◎ ◎ ◎ ○ Density (g/cm ³ ) 0.46 0.27 0.19 0.20 0.21 0.19 0.22 Compressive strength (MPa) 0.21 0.22 0.17 0.15 0.17 0.19 0.18 crack No cracks No cracks Crack occurrence No cracks No cracks No cracks Crack occurrence ◎: Easy to fire, ○: Average, △: Low firing cost

As shown in Table 4 above, when some ingredients were omitted, used in trace amounts, or used excessively, plasticity, density, or compressive strength decreased or cracks occurred. Although the description has been made above with a focus on the embodiments of the present invention, this It is only an example and does not limit the present invention, and various modifications and applications not exemplified above are possible for those skilled in the art without departing from the essential characteristics of the embodiments of the present invention. You will be able to know. For example, each component specifically shown in the embodiments of the present invention can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (1)

A method comprising attaching an artificial ceramic clay composition to an aggregate and then drying it,
The artificial ceramic clay composition contains 15-40 wt% of glass powder; Acrylic resin 10-40 wt%; Silica 10-50 wt%; Surfactant 0.5-8 wt%; Gypsum 1-10 wt%; Talc 1-10 wt%; and the remaining amount of purified water.
Method for manufacturing art furniture using artificial ceramic clay composition.