KR102166172B1 - An Eco-friedly Ornament-plate with Surfaced by Low Pressure Melamine impregnated paper having Antibiosis Effect - Google Patents

Abstract

The present invention relates to a method for manufacturing a low-pressure decoration panel having a surface layer formed of an eco-friendly antibacterial melamine decoration sheet, which provides hygiene. More specifically, according to the present invention, the method comprises the following steps of: (S1) calcining and pulverizing ark shells to make ark shell powder; (S2) adding 0.2-0.4 parts by weight of the ark shell powder to 100 parts by weight of a melamine resin to prepare the melamine resin; (S3) impregnating a printed sheet with a urea resin and drying the impregnated printed sheet at 100-130°C for 20-30 seconds; (S4) impregnating the dried printed sheet with the melamine resin prepared in the step (S2) and drying the impregnated printed sheet at 140-160°C for 30-40 seconds; and (S5) hot-pressing the dried printed sheet on a panel at 170-190°C and a pressure of 150-200 bar for 25-35 seconds.

Description

An Eco-friedly Ornament-plate with Surfaced by Low Pressure Melamine impregnated paper having Antibiosis Effect}

The present invention relates to a method of manufacturing a decorative plate having a surface layer formed of an eco-friendly antibacterial melamine decorative sheet, and more particularly, a surface layer is formed using an antibacterial melamine sheet composed of an eco-friendly additive using cockle shell powder as an antibacterial material, The present invention relates to a method of manufacturing a low-pressure decorative plate (LPM) in which the emission of harmful substances is very excellent and eco-friendly, and the color, pattern, and gloss of cosmetic printing paper are expressed as it is.

The veneer has been used for various purposes, such as veneers for walls and ceilings, veneers for doors, veneers for interior decoration of vehicles, ships, and aircraft. As a material for such a decorative board, in the early stages, thin sheets of various veneers were mainly used as decorative decorative boards by bonding them on plywood, fiber boards, chip boards, and metal boards, but their water absorption resistance, stain resistance, corrosion resistance, and durability were weak. Therefore, recently, veneers made of synthetic resins dominate.

Among synthetic resin materials, there are decorative plates made of a thermoplastic resin material in which a sheet or film of a thin plate printed with various patterns is adhered to the surface of a wooden board or a metal plate. Such a decorative sheet made of a thermoplastic resin material has good processability and is inexpensive, so mass production is possible. However, heat resistance, fouling resistance, abrasion resistance, and scratch resistance are not good, and dimensional stability is not good due to the high elasticity by heat. In particular, plasticizers, stabilizers containing heavy metals, and evaporative organic compounds (VOC) are added to the human body. It generates harmful toxicity and causes various diseases.

On the other hand, the decorative plate of the thermosetting resin is made of a phenolic resin or an amino resin, but the decorative plate of an amino resin is mainly made of melamine. Melamine resin is produced by condensation polymerization of methylol melamine produced by the reaction of melamine and formaldehyde, and when uncured, it is a viscous liquid and is cured by heat. Since the physical properties are colorless and transparent, when impregnated with melamine resin, the color of the impregnated printed makeup pattern is well displayed. In addition, since the cured surface hardness is higher and harder than that of amino-based urea resin, it can be said to be one of the hardest thermosetting synthetic resins currently being produced. It has good heat resistance due to its high heat distortion temperature and is stable to chemicals and organic solvents. . In addition, water resistance and water absorption are much more stable than urea resin, water resistance is strong, and formalin is hardly eluted even when exposed to weak acids or weak alkalis, so it is safe for hygiene. In addition, it can be said that the exterior is harmless for hygiene, revealing the high quality and antique texture.

LPM (Low pressure Melamine Laminate) is mainly used as a surface finishing method. In the manufacturing method of LPM, first, a cosmetic printing paper is made by gravure printing on paper, and then a melamine resin is impregnated in the cosmetic printing paper, followed by drying and applying heat and pressure to prepare LPM. LPM is manufactured by relatively low pressure compared to HPM, and has the advantage of improving the aesthetics of the surface and improving the waterproofing effect. However, when the LPM is used in kitchen furniture, floorboards, etc., bacteria and the like grow in parts that are in contact with the human body. In order to solve this problem, an antimicrobial agent was included in the LPM, but the dispersibility of the antimicrobial agent was lowered, resulting in a problem in that the acidity was insufficient and the antibacterial property was not maintained for a long time.

As a background technology related to the present invention, there is Korean Patent Publication No. 10-0729254 (registered in 20070611), and the document discloses a method for manufacturing a panel manufactured using a mixture of melamine resin and lacquer liquid. In addition, Patent Publication No. 10-386031 discloses triaryl phosphate (Tri) in any one or two or more layers of a back layer, a print layer, or a surface layer in a decorative plate including a back layer, a printing layer, and a surface layer in the manufacturing method of a decorative plate. -Aryle-Phosphate) or an oxybis-phenoxyarcin antimicrobial agent is disclosed, and triaryl phosphate is a toxic substance and a boiling point of 80°C, which is easy to evaporate and decompose, The oxybis-phenoxyarcin antibacterial agent is an organic antibacterial agent and can be said to be an antibacterial agent that can have an excellent antibacterial effect in the initial stage, but the organic antibacterial agent is weak in weather resistance compared to inorganic antibacterial agents.

Registered Patent No. 10-1652089 (name of the invention: a decorative plate with excellent antibacterial properties and a method for manufacturing the same) discloses a decorative plate to which inorganic antibacterial agents such as cyclosilicate antibacterial agents and phyllosilicate antibacterial agents are added. There is a need to manufacture a decorative board using a harmless, eco-friendly natural antibacterial agent.

On the other hand, in accordance with the safety standards for children's products subject to supplier conformity verification under the Special Act on Safety of Children's Products in effect on January 22, 2018 (Notification No. 2017-0018 of the Ministry of Industry, enacted on January 31, 2017), children's product furniture used in day care centers, kindergartens, and elementary schools It is necessary to meet the standards for the amount of hazardous substances released in the safety standards, and it is necessary to manufacture a decorative plate using an eco-friendly natural antibacterial agent that meets these standards and is harmless to the human body.

The present invention is invented to solve the conventional problems as described above and has the following objects.

The present invention is to provide a decorative sheet having hygiene properties by forming one or both sides of a cosmetic sheet having excellent antibacterial properties and environmentally friendly emission of harmful substances, and a method of manufacturing the same.

The present invention is to provide a decorative plate for children's furniture and a method for manufacturing the same, in particular, using an environmentally friendly inorganic antibacterial material with good weather resistance.

The present invention is to provide a decorative plate material and a method of manufacturing the same, in which an antimicrobial material is added and the color or pattern of the decorative plate material is well displayed.

The present invention for achieving the above object is implemented by the following solutions.

The method of manufacturing a decorative plate having a surface layer formed of an antibacterial melamine decorative sheet according to the present invention includes the steps of pulverizing an Ark shell to produce a powder (S1); Preparing a melamine resin composition by adding 1.5 parts by weight of the cockle shell powder to 100 parts by weight of the melamine resin (S2); After impregnating the cosmetic printing paper in the urea resin, drying for 20 to 30 seconds at 100 to 130°C (S3); Impregnating the cosmetic printing paper dried in the step S3 into the melamine resin prepared in the step S2, and then drying it at 140 to 160° C. for 30 to 40 seconds (S4); And heat-pressing the cosmetic printing paper dried in step S4 on the panel at 170 to 190°C, pressure 150 to 200 bar, and for 25 to 35 seconds (S5), wherein the ark shell of step S1 is calcined. The temperature is 1,200°C, and in the melamine resin composition of step S2, 8.5-7.5 parts by weight of trioctyl trimellitate as a solvent for a non-phthalate plasticizer type, 0.45 parts by weight of PVC as an anti-settling and dispersant, and nitrite as a coloring agent It characterized in that it further contains 0.05 parts by weight.

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The present invention has the following effects by the above configuration.

The present invention provides a decorative sheet using an eco-friendly cosmetic sheet having excellent antimicrobial properties and an environmentally friendly discharge amount of harmful substances, and has hygiene by forming one or both sides, while providing a decorative sheet using an environmentally friendly inorganic antibacterial material with good weather resistance and a manufacturing method thereof. There is an effect.

The present invention has the effect of providing a decorative board and a method of manufacturing the same, in which an antimicrobial material is added, and the color or pattern of the decorative board is well displayed.

The applicant will be described in detail the solution means of the present subject beforehand below. Details of known techniques that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

The method of manufacturing a decorative plate having a surface layer formed of an antibacterial melamine decorative sheet according to the present invention includes the steps of pulverizing an Ark shell to produce a powder (S1); Preparing a melamine resin composition by adding 1 to 2 parts by weight of the cockle shell powder to 100 parts by weight of the melamine resin (S2); After impregnating the cosmetic printing paper in the urea resin, drying for 20 to 30 seconds at 100 to 130°C (S3); Impregnating the cosmetic printing paper dried in the step S3 into the melamine resin prepared in the step S2, and then drying it at 140 to 160° C. for 30 to 40 seconds (S4); And heat-pressing the cosmetic printing paper dried in step S4 on the panel at 170 to 190°C, pressure 150 to 200 bar, and 25 to 35 seconds (S5).

In addition, the temperature at which the ark shell is sintered in step S1 is 1,200°C. In the melamine resin composition in step S2, the melamine resin composition includes trioctyl trimelli as a solvent for a non-phthalate plasticizer type. Tate (Trioctyl trimellitate) 8.5-7.5 parts by weight, PVC as a sedimentation preventing and dispersing agent 0.45 parts by weight, as a coloring agent may be further included 0.05 parts by weight of nitrite.

<Step of pulverizing the ark shell to produce powder (S1)>

Komak is a shellfish belonging to the stony clam family, mainly distributed in the west and south coasts of Korea. It has a shape close to a square shape, and has a very thick scallop. The inside of the conch is white, and the color of the flesh is red.

After removing sea moss or seaweed attached to the ark shell, cleaning, drying and sterilizing afterwards. The sterilized Ark shell is fired at 1,200℃ to increase ionization, and the fired Ark shell is pulverized to produce powdery powder. The cockle shell powder subjected to the sintering process by the present inventors has a CaO content of 97%, contains Mg, Mn, etc., and it has been found to have an excellent effect on sterilizing E. coli and staphylococcus with a strong sterilization effect. It has the effect of replacing sodium hypochlorite and caustic soda or replacing anhydrous sodium carbonate, a preservative.

<Step of preparing a melamine resin composition (S2)>

Above all, in the case of a decorative plate, the aesthetics of its appearance is the most important. When the cockle shell powder is added to the melamine resin, a problem occurs in that the unique color or pattern of the printing paper cannot be properly displayed. Due to this problem, in the case of decorative boards, especially melamine decorative boards, the cockle shell powder was not added as an antibacterial agent. However, the inventors of the present invention invented the addition ratio of cockle shell powder, that is, the addition ratio having a critical significance, which has the effect of generating antibacterial effect and allowing the color and pattern of printing paper to be displayed as it is.

Specifically, 1 to 2 parts by weight, preferably 1.5 parts by weight, is added to 100 parts by weight of the melamine resin. If the cockle shell powder is added in excess of 2 parts by weight, the unique color or pattern of the printing paper may not be displayed properly, the production cost may be increased, and the hardness of the cosmetic sheet may decrease. If less than 1 part by weight of cockle shell powder is added, the antibacterial effect is not exhibited.

In addition to securing antibacterial properties, the melamine resin may be added with a non-phthalate plasticizer type solvent, a color developing agent, PVC, etc. to prevent physical properties such as impact resistance and crack resistance.

Trioctyl trimellitate is a non-phthalate plasticizer-type solvent that dissolves PVC that has a sedimentation prevention and dispersion function, and gives impact resistance and crack resistance to the cosmetic sheet together with PVC.

Nitrite used as a coloring agent includes sodium nitrite and potassium nitrite, and nitrite has strong hygroscopicity in the state of crystalline powder or granular mass and is soluble in water. When left in the air, it is gradually oxidized to nitrate, decomposed when heated at 320℃, and is used for food additives. Also used as. Nitrite is a color developing agent, unlike colorants, itself is colorless and never colored by itself, but colored substances that are mixed or in contact, for example, the color of printed paper patterns, patterns, or the color of colored melamine resin are fixed and stable. It enhances the decorative effect of the decorative panel by making the color of the decorative panel vivid and beautiful by making it clear and promoting color development.

In addition, sodium nitrite has the function of inhibiting the growth of microorganisms, so sodium's bacterial growth inhibitory effect is particularly strong against anaerobic bacteria, kills Clostridium boturinum, a food poisoning bacteria, and has antioxidant activity, so it has a function of inhibiting rancidity. Potassium nitrite, which is a nitrite, is also a material having a function almost equal to that of sodium nitrite, and thus a more hygienic and eco-friendly decorative board can be obtained together with the aforementioned antibacterial agent, cockle shell powder.

The most effective addition range based on 100 parts by weight of melamine resin, 8.5-7.5 parts by weight of trioctyl trimellitate as a solvent for non-phthalate plasticizers, 0.45 parts by weight of PVC as an anti-settling and dispersant, and 0.05 parts by weight of nitrite as a coloring agent. Can be said.

<Immersion and drying of printed paper (S3)(S4)>

In step S3 of the present invention, printing paper is impregnated with urea resin, and the impregnated printing paper is dried for 20 to 30 seconds at 100 to 130°C. In step S4 of the present invention, the dried printing paper is impregnated in the prepared melamine resin and the impregnated Dry the printed paper at 140 ~ 160℃ for 30 ~ 40 seconds.

In the present invention, the printing paper is not impregnated with only melamine resin, but is characterized in that it undergoes two impregnation drying steps (steps S3 and S4) of impregnating and drying the urea resin first, followed by impregnation with the melamine resin and drying.

In the manufacture of decorative boards, if the two steps of impregnation drying step (S3 step and S4 step) with urea resin and melamine resin are carried out, the color (color) of the print paper is overwhelmingly clearer than the impregnation of the print paper with only melamine resin. Because there is. Moreover, in the case of a sheet impregnated with a melamine resin in the drying time, a curing time of 60 to 90 seconds (refer to Registration Patent No. 10-1094720) is required, while a two-step impregnation melamine resin with the urea resin and melamine resin of the present invention. The two steps of impregnation and drying step (step S3 and step S4) of impregnating and drying are combined to be 50 to 70 seconds, and the drying time is rather reduced, so that the manufacturing process proceeds more quickly. Furthermore, since the unit price of the urea resin is lower than that of the melamine resin, the manufacturing process of the present invention has a remarkably excellent effect in terms of economics.

In the cosmetic sheet manufacturing method, the method of infiltrating the antibacterial melamine resin solution into the printing paper is to impregnate the printing paper into the resin solution, and then impregnate the printing paper while controlling the impregnation amount with an elastic braid contacting both sides, and infiltrating with roller coating. It is okay to choose. However, the degree of hardening of the antimicrobial melamine resin that penetrates the printing paper obtained by the continuous working process by the roller and the antibacterial melamine resin attached to the surface can determine the difficulty of workability in the subsequent lamination process and affects the adhesion during panel bonding. The cured state should be cured in such a way that the flow of the melamine resin solution attached to the surface of the printing paper does not occur at all.

<Step of hot-pressing dried printing paper on a panel at 170 ~ 190℃, pressure 150 ~ 200bar, 25 ~ 35 seconds (S5)>

If the cured state of the decorative plate sheet is excessive, the adhesive strength is weakened in the panel bonding process, and the decorative plate sheet resin layer structure does not penetrate into the fine surface irregularities of the panel, so the adhesion effect by the bonding force cannot be expected, so the adhesion becomes more vulnerable. And, if the cured state of the cosmetic sheet is insufficient, adhesion can be expected, but the surroundings are likely to be contaminated. And if the curing degree of the decorative sheet is too low, the press work is not easy and the dimensional stability of the thickness cannot be expected because the pressing phenomenon occurs in all directions due to the high pressure of the press in the bonding process with the panel, so the curing state in each process is very important. can do. In step S5 of the present invention, the printed paper dried in step S4 is hot-pressed on the panel at 170 to 190°C, pressure 150 to 200 bar, and 25 to 35 seconds.

Hereinafter, the present invention will be described in detail through specific examples. The following examples illustrate the present invention in more detail, but do not limit the scope of the present invention.

<Example 1>

To 100 kg of uncured melamine resin solution, 1.5 kg of cockle shell powder, 7.5 kg of trioctyl trimellitate, 0.45 kg of PVC, and 0.05 kg of nitrite were added and stirred to prepare a homogeneous antibacterial melamine resin solution. Cosmetic printing paper was impregnated with urea resin, and the impregnated printing paper was first dried by passing it through a heat chamber maintained at 100 to 130°C for 20 to 30 seconds, and the dried printing paper was impregnated with the melamine resin prepared above and then impregnated. The printed paper was passed through a heat chamber maintained at 140 to 160° C. for 30 to 40 seconds and dried for a second time to prepare a melamine sheet (cosmetic plate). The particle board and the melamine sheet obtained above were laminated as a panel, and then cured by heat treatment at a temperature of 170 to 190°C, a pressure of 150 to 200 bar, and a pressure heat treatment for 25 to 35 seconds with a heat press to prepare a decorative board having a thickness of 20 mm.

<Comparative Example 1>

A decorative plate was manufactured through the same process as in Example 1. In Comparative Example 1, no antibacterial material cockle shell powder was added to 100 kg of the melamine resin solution.

<Comparative Example 2>

A decorative plate was manufactured through the same process as in Example 1. In Comparative Example 2, 0.5 kg of cockle shell powder, which is an antibacterial material, was added to 100 kg of the melamine resin solution.

<Comparative Example 3>

A decorative plate was manufactured through the same process as in Example 1. In Comparative Example 2, 3 kg of cockle shell powder, an antibacterial material, was added to 100 kg of the melamine resin solution.

<Results of antibacterial test of antibacterial cosmetic plate>

1. Antimicrobial test result of Example 1, which is an antibacterial cosmetic plate of the present invention = 1.5kg of cockle shell powder added

Test Items unit Test Methods Test result Remark Antibacterial test (E. coli)-antibacterial activity (initial) Logarithmic value JIS Z 2801: 2012 5.8 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Escherichia coli)-Antibacterial activity (after accelerated weather resistance) Logarithmic value JIS Z 2801: 2012 5.8 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Pseudomonas aeruginosa)-antibacterial activity (initial) Logarithmic value JIS Z 2801: 2012 5.3 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Pseudomonas aeruginosa)-antibacterial activity (after accelerated weather resistance) Logarithmic value JIS Z 2801: 2012 5.3 (35.0±0.2)℃
(93.9±0.1)% RH

2. Antibacterial test result of Comparative Example 1, which is a general cosmetic plate, = 0kg of cockle shell powder added

Test Items unit Test Methods Test result Remark Antibacterial test (E. coli)-antibacterial activity (initial) Logarithmic value JIS Z 2801: 2012 5.8 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Escherichia coli)-Antibacterial activity (after accelerated weather resistance) Logarithmic value JIS Z 2801: 2012 2.4 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Pseudomonas aeruginosa)-antibacterial activity (initial) Logarithmic value JIS Z 2801: 2012 5.3 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Pseudomonas aeruginosa)-antibacterial activity (after accelerated weather resistance) Logarithmic value JIS Z 2801: 2012 5.3 (35.0±0.2)℃
(93.9±0.1)% RH

3. Antibacterial test result of Comparative Example 2, which is a general cosmetic plate, = 0.5kg of cockle shell powder added

Test Items unit Test Methods Test result Remark Antibacterial test (E. coli)-antibacterial activity (initial) Logarithmic value JIS Z 2801: 2012 5.8 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Escherichia coli)-Antibacterial activity (after accelerated weather resistance) Logarithmic value JIS Z 2801: 2012 2.6 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Pseudomonas aeruginosa)-antibacterial activity (initial) Logarithmic value JIS Z 2801: 2012 5.3 (35.0±0.2)℃
(93.9±0.1)% RH Antibacterial test (Pseudomonas aeruginosa)-antibacterial activity (after accelerated weather resistance) Logarithmic value JIS Z 2801: 2012 5.3 (35.0±0.2)℃
(93.9±0.1)% RH

In the E. coli antibacterial test, in Example 1, Comparative Example 1, and Comparative Example 2, the initial antibacterial activity was 5.8 (corresponding to about 99.9% antibacterial activity) based on a log value, but after accelerated weathering, the antibacterial activity of Comparative Example 1 was log As a value of 2.4, the antimicrobial activity of Comparative Example 2 was significantly weakened with a log value of 2.6. On the other hand, it was confirmed that Example 1 maintained excellent antibacterial activity with a log value of 5.8 even after passing through accelerated weathering. And, in the case of Pseudomonas aeruginosa antibacterial test, it was confirmed that both Example 1, Comparative Example 1, and Comparative Example 2 exhibited excellent antibacterial activity (log value of 5.3).

<Results of discoloration test of cosmetic plate>

Whether or not the unique color or pattern of the printing paper appears properly was measured through the dyeing fastness test (KS A ISO 105-A02:2014).

The 5th grade of the original sample is based on Comparative Example 1 (addition of 0kg of cockle shell powder), which is a general veneer, and color change of Example 1 (addition of 1.5kg of cockle shell powder) and Comparative Example 3 (=addition of 3kg cockle shell powder) The difference was measured.

Fastness class Color difference Tolerance 5 0 0.2 4-5 0.8 ±0.2 4 1.7 ±0.3 3-4 2.5 ±0.35 3 3.4 ±0.4 2-3 4.8 ±0.5 2 6.8 ±0.6 1-2 9.6 ±0.7 One 13.6 ±1.0

1. Results of discoloration test of Example 1, which is an antibacterial cosmetic plate of the present invention = 1.5 kg of cockle shell powder added

Test Items unit Test Methods Test result Remark Fading -GREY SCALE rank KS K ISO 105-A02:2014 4 (23±2)℃
(50±5)% RH

The discoloration test result of the antibacterial cosmetic board of the present invention is 4 grades of discoloration, and referring to <Table 4>, the difference in color change is not large due to a difference of 2 grades when compared to the original sample of grade 5 general decorative board It was confirmed that it can be used because it does not affect the appearance aesthetics.

2. Results of discoloration test of Comparative Example 3 = 3kg of cockle shell powder added

Test Items unit Test Methods Test result Remark Fading -GREY SCALE rank KS K ISO 105-A02:2014 2-3 (23±2)℃
(50±5)% RH

Comparative Example 3 (addition of 3 kg of cockle shell powder) The test result was 2-3 grades of discoloration, and when referring to <Table 4>, the difference in color change was significant due to a difference of 5 grades compared to the original sample, grade 5 general veneer. It was confirmed that it was impossible to use because there was a problem that the printing paper color of the decorative board was not displayed as it was.

<Test results of safety requirements for hazardous substances of Example 1, which is an antimicrobial cosmetic plate of the present invention>

Item Allowed value (less than) General cosmetic plate A (general product on the market) General Cosmetic Plate B (Excellent Procurement Certification Product) Comparative Example 1 Example 1 Formaldehyde emission amount 0.12 mg/m2·h 0.021 0.019 0.012 0.011 Toluene emission 0.080 mg/m2·h 0.001 0.005 Not detected Not detected Total Volatile Organic Compounds Emission TVOC 4 mg/m2·h 0.328 0.025 0.005 0.014 Content of harmful elements Total lead (Pb)9) 300 mg/kg Not detected Not detected Not detected Not detected Total cadmium (Cd) 75 mg/kg Not detected Not detected Not detected Not detected Phthalate plasticizer
Total content DEHP 0.1% Not detected Not detected Not detected Not detected DBP BBP

(1) DEHP (Diethylhexyl Phthalate, Diethylhexyl Phthalate)

(2) DBP (Dibutyl Phthalate)

(3) BBP (Butyl benzyl Phthalate, butyl benzyl phthalate)

As a result of testing according to the safety standards for children's products subject to confirmation of supplier suitability under the Special Act on Safety for Children's Products, which was enforced on January 22, 2018, the antimicrobial veneer (Example 1) of the present invention satisfies all five items to the safety standard tolerance. Safe and excellent results were confirmed because the amount of toxic substances emitted was much lower than that of general products and products certified for good procurement manufactured by the manufacturing method. Accordingly, the present invention is considered to be very suitable for use as children's product furniture used in day care centers, kindergartens, and elementary schools.

It can be seen that the present invention is eco-friendly with excellent antibacterial effect and emission of harmful substances, and has the effect of being able to appear as it is, regardless of the color and pattern of printing paper.

Claims (4)

Pulverizing after firing the cockle shell (Ark shell) to prepare a powder (S1);
Preparing a melamine resin composition by adding 1.5 parts by weight of the cockle shell powder to 100 parts by weight of the melamine resin (S2);
After impregnating the cosmetic printing paper in the urea resin, drying for 20 to 30 seconds at 100 to 130°C (S3);
Impregnating the cosmetic printing paper dried in the step S3 into the melamine resin prepared in the step S2, and then drying it at 140 to 160° C. for 30 to 40 seconds (S4); And
Including the step (S5) of hot-pressing the cosmetic printing paper dried in step S4 on the panel at 170 to 190°C, pressure 150 to 200 bar, and 25 to 35 seconds,
The temperature at which the ark shell of step S1 is fired is 1,200°C,
The melamine resin composition of step S2 further contains 8.5-7.5 parts by weight of trioctyl trimellitate as a solvent for a non-phthalate plasticizer, 0.45 parts by weight of PVC as an anti-settling and dispersant, and 0.05 parts by weight of nitrite as a coloring agent. A method for producing a low-pressure cosmetic plate having a surface layer formed of an antibacterial melamine cosmetic sheet, characterized in that. delete delete delete