KR101290553B1 - Melamine resin for air quality improvement and manufacturing method of furniture board thereby - Google Patents

Abstract

PURPOSE: A manufacturing method of a furniture board is provided to reduce the number of manufacturing processes, and to provide an indoor air-improving furniture boards by using a melamine resin solution which uses effect of oxidizing and decomposing harmful materials. CONSTITUTION: A manufacturing method of a furniture board comprises a step of preparing an indoor air-improving furniture boards by using a functional melamine resin solution; a step of impregnating the functional melamine resin solution into 1-3 sheets of graft paper (1) and printing paper for cosmetics (2); a step of primarily drying the graft paper and printing paper in a heating chamber; a step of attaching the graft paper and printing paper to each other; a step of manufacturing a cosmetic sheet (A) by pressing the synthesized printing sheet and graft sheet; and a step of attaching the cosmetic sheet to an object (P) and conducting pressurization and heat treatment.

Description

Melamine Resin for Air Quality improvement and Manufacturing Method of Furniture Board

The present invention relates to a method for manufacturing furniture plate, and more particularly, to a method for manufacturing an indoor air quality improving functional furniture sheet using an indoor air quality improving functional melamine resin solution used for manufacturing a decorative plate which is a furniture plate.

In general, plate materials used in interior materials such as buildings, offices, hotels, shops, houses, school classrooms, and other furnitures are made by joining decorative sheets to enhance the merchandise, ie, fancy plywood and decorative plywood. I'm using. Therefore, the decorative sheet or the decorative plate is required to be excellent in specific characteristics such as wear resistance, pollution resistance, flame retardancy, durability depending on the installation location or conditions.

In order to improve the properties required for the cosmetic plate as described above, Korean Patent Registration No. 10-0797543 (name of the invention: Hanji surface shape paper containing a functional material, its manufacturing method and the Hanji cosmetics including the paper surface paper) Discloses a method of manufacturing a makeup plate with a surface of paper made of Hanji containing functional materials such as loess, elvan, and the like. Korean Patent No. 10-0889673 (Invention Name: Makeup Sheet) includes a base sheet, a pattern layer, and a transparent sheet. The present invention discloses a cosmetic sheet having excellent stain resistance and durability including an ionizing radiation polymerizable oligomer and a reactive silicone acrylate in a surface protective layer using a resin sheet and a cosmetic sheet laminated in the order of the surface protective layer. -1059787 (name of the invention: cosmetic boards containing aromatic ingredients, floorboards and finishing boards using them) is beneficial to the human body using aroma stock solution It discloses a decorative plate to emit the ingredients, Korean Patent No. 10-0500057 (name of the invention: the manufacturing method of a decorative plate for furniture and a decorative plate for furniture produced therefrom) is a fine particle titanium and far-infrared radiation effect It started and registered the board | plate using the coating resin liquid which mixed tourmaline which has.

On the other hand, modern people spend most of their time in indoor spaces such as houses, offices, and underground spaces, so that they are exposed to pollutants that are harmful to humans indoors. There is a growing interest in Indoor Air Quality (IAQ). In this respect, the improvement of indoor air quality in a cosmetic board is a technological breakthrough. However, as already described, the prior art does not actively disclose a decorative plate exhibiting an effect of improving indoor air quality, but only discloses passive functional decorative plates such as an aromatic component or far-infrared radiation.

In addition, a conventional technique related to indoor air quality improvement includes a technique using a photocatalyst such as titanium dioxide, and the conventional technique using titanium dioxide (TiO ₂ ) as a photocatalyst may be prepared by directly using the prepared photocatalyst powder or by binding to a powder. And a method of coating on a support or a carrier as a coating material and coating a titanium compound such as titanium tetrachloride or titanium alkoxide on the support and then forming a thin film of anatase titanium dioxide on the surface of the support by using a sol-gel method. . In order to use titanium dioxide powder itself as a photocatalyst, powdered titanium dioxide in which anatase or anatase and rutile crystal structures are mixed as a primary material is synthesized through a sulfuric acid method and a chlorine method. The titanium dioxide powder thus prepared is used in the form of a slurry or surface coated on a support.

However, metal oxides such as titanium dioxide, when combined with other materials, cause stiffness and whitening and flocculation, and due to the activity of a photocatalyst that oxidizes most organic materials and decomposes them into carbon dioxide and water, Not only does it deform, but there is a problem in that the crystal structure is deformed at a high temperature, and when titanium dioxide is used to form a thin film by the sol-gel method, the specific surface area is small and the activity of the photocatalyst due to coating decreases. There is a problem that there is a limit that can not be freely used in the production of melamine resin solution used in the manufacture of the decorative plate, which is a furniture plate.

Republic of Korea Patent No. 10-0797543 Republic of Korea Patent No. 10-0889673 Republic of Korea Patent No. 10-1059787 Republic of Korea Patent No. 10-0500057

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the related art, and has the following objectives.

An object of the present invention is to reduce the manufacturing process step of the decorative plate, which is a furniture plate, and to use the melamine resin solution that utilizes the function of oxidatively decomposing harmful substances of metal oxide, preferably titanium dioxide (TiO ₂ ), photocatalyst. It is to provide a method of manufacturing a functional furniture sheet for improving indoor air quality that brings an improvement effect.

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

The method for manufacturing indoor air quality-improved functional furniture sheet of the present invention is a metal oxide coated with a porous silica airgel of three-dimensional mesh structure in 100 parts by weight of thermosetting melamine resin made by reacting 50 parts by weight of melamine and 50 parts by weight of formaldehyde. The indoor air quality improvement functional melamine resin solution which added 1.5-5 weight part of air quality improvement functional compositions which consists of 80-90 weight part, 5-10 weight part of dispersing agents, 2-5 weight part of plasticizers, and 2-5 weight part of coloring agents. Preparing; Infiltrating the indoor air quality improving functional melamine resin solution on the cosmetic printing paper and one to three kraft papers; Firstly drying the cosmetic printing paper and the kraft paper in which the melamine resin solution has penetrated through the heat chamber maintained at a temperature of 70 to 80 ° C. for 80 to 100 seconds; Stacking and laminating the primary dried cosmetic printing paper and kraft paper; Preparing a cosmetic sheet by pressing the laminated printing paper and kraft paper at a temperature of 90 to 100 ° C. at 1 to 1.5 atm for 90 to 100 minutes; And pressurizing and heat-treating for 25 to 35 minutes at a temperature of 190 to 220 ° C. and a pressure of 22 to 28 kgf / cm ² after adhering the makeup sheet to the adherend, and manufacturing the indoor air quality improving functional furniture sheet. Characterized by providing a method, wherein the adherent is characterized in that the one selected from the group consisting of particle board (particle board), medium density fiber board (MDF), hard board (hardboard), gypsum board and plywood.

The present invention has the following effects with the above-described configuration.

The present invention is a room in which furniture is placed using the function of oxidatively decomposing harmful substances of metal oxides, preferably titanium dioxide (TiO ₂ ), which are photocatalysts, in the production of melamine resin solutions used in the manufacture of decorative plates, which are furniture plates. Providing indoor air quality improvement effect such as removing environmental pollution, antibacterial and deodorization, reducing the stage of manufacturing process, and producing indoor air quality improvement functional furniture plate which brings indoor air quality improvement effect by using the melamine resin solution. Has the effect of providing a method.

1 is a schematic diagram of a metal oxide coated with a porous silica airgel of a three-dimensional network structure.
2 is a cross-sectional view of the indoor air quality improvement functional furniture sheet of the present invention.

The Applicant hereunder explains in detail the means for solving the foregoing problem. The detailed description of known technology, which is considered to be unnecessarily obscured by the gist of the present invention, will be omitted.

The indoor air quality improvement functional melamine resin solution of the present invention is used for the manufacture of a decorative plate, which is a furniture plate, and porous silica having a three-dimensional mesh structure with 100 parts by weight of thermosetting melamine resin made by reacting 50 parts by weight of melamine with 50 parts by weight of formaldehyde. Aerogel-Coated Metal Oxides The indoor air quality improvement functional melamine resin solution which added 1.5-5 weight part of air quality improvement functional compositions which consists of 80-90 weight part, 5-10 weight part of dispersing agents, 2-5 weight part of plasticizers, and 2-5 weight part of coloring agents. It is characterized in that, the metal oxide is characterized in that the titanium dioxide (TiO ₂ ). That is, the present invention is characterized by providing an indoor air quality improving functional melamine resin solution by adding 1.5 to 5 parts by weight of the indoor air quality improving functional composition to 100 parts by weight of the thermosetting melamine resin, and will be described in detail below.

Thermosetting melamine resin

The thermosetting melamine resin is produced by reacting melamine (C ₃ H ₆ N ₆ ) with formaldehyde, and the thermosetting melamine resin is industrially manufactured in large quantities due to its high heat resistance, water resistance, mechanical strength, and hardening resistance. In the present invention, the thermosetting melamine resin is prepared by reacting 50 parts by weight of melamine and 50 parts by weight of formaldehyde.

Porous silica By airgel  Coated metal oxide

The metal oxide coated with the porous silica airgel of the three-dimensional network structure is shown in FIG. 1. As shown in FIG. 1, it can be seen that silica airgel (SiO ₂ ) is coated around the metal oxide such as titanium dioxide (TiO ₂ ). The silica airgel coated around the metal oxide has a structure in which spherical silica particles having a size of 2-5 nm are combined to form a mesh-like cluster in three dimensions, thereby forming a porous structure having nano pores.

Therefore, by coating the airgel with silica having low thermal conductivity around the metal oxide, porosity may be improved, thereby providing excellent thermal stability. In addition, at the same time, by having a three-dimensional network structure to solve the problem of blocking light by silica to reach the photocatalyst inside, it can maintain the photocatalytic activity without deactivation, and the specific surface area is widened, the adsorption capacity is increased, the photocatalytic activity Can be increased, and aggregation between the photocatalytic particles is prevented to improve dispersibility. As such, the three-dimensional porous silica gel is coated around the photocatalyst to prevent direct contact between the photocatalyst, the organic support and the binder, thereby preventing the decomposition of the organic support and the binder, which has been a problem in the conventional photocatalyst. Furthermore, by further containing Si coated with silica airgel, it is possible to reduce the manufacturing cost by performing an indoor air quality improvement function with a component such as expensive Ti in a significantly smaller amount than a composite compound having conventional photocatalytic activity.

The metal oxide coated with the porous silica airgel of the three-dimensional network structure is

(a) mixing any one of water glass (Na ₂ SiO ₃ ) or silica sol with a metal oxide to prepare a mixture of sol-shaped metal oxides;

(b) gelling the mixture of metal oxides to form a metal oxide gel;

(c) surface modifying the metal oxide gel;

(d) drying the metal oxide gel to form a metal oxide having a silica airgel coated thereon; And

(e) is prepared by a manufacturing method comprising the step of firing the metal oxide coated with the silica airgel.

The metal oxide used in step (a) of the production method is preferably an oxide having photocatalytic activity. For example, TiO ₂ , ZnO ₂ , ZnO, SrTiO ₃ , CdS, GaP, InP, GaAs, BaTiO ₃ , KNbO ₃ , Fe ₂ O ₃ , Ta ₂ O ₅ , WO ₃ , SnO ₂ , Bi ₂ O ₃ , NiO, Cu ₂ O, SiO, SiO ₂ , MoS ₂ , InPb, RuO ₂ , CeO _2, and the like. Among these, when titanium dioxide (TiO ₂ ) is used, titanium dioxide itself may be used, or a visible light photocatalyst prepared by doping titanium dioxide with anions such as nitrogen, sulfur, fluorine, and carbon may be used. In the case of the visible light photocatalyst doped with anion in titanium dioxide or titanium dioxide, it is harmless to human body, has excellent photocatalytic activity, excellent corrosion resistance and low price.

In addition, a metal such as Pt, Rh, Ag, Cu, Sn, Ni, Fe, or the like may be added to the metal oxide, and another metal oxide may be added to the metal oxide to be used as a composite metal oxide. In addition, titanium intermediates such as Ti (OH) ₄ and TiO (OH) ₂ can be used.

Further, in the step (a), any one of the metal oxide and the water glass or silica sol is mixed so that the weight ratio of silica contained in any one of the metal oxide and the water glass or silica sol has 0.01 to 10: 1. Preferably, the metal oxide may further include a step of treating with a modifier to increase the -OH bonding strength between the silica and the metal oxide. The metal oxide modifier may be a solution obtained by diluting an acid such as hydrochloric acid, nitric acid, sulfuric acid, acetic acid, polyhydric carboxylic acid, or a base such as sodium hydroxide, ammonia water, or hydrogen peroxide solution. It is preferable to process. Then, the mixed solution of the metal oxide and water glass is strongly stirred to prepare a mixed sol.

The metal oxide gel of step (b) may be formed by adding an acid solution having a pH of 1 to 10 to the mixture of the metal oxides and gelling it. At this time, hydrochloric acid, sulfuric acid, nitric acid and the like can be diluted with a solvent, and methanol, ethanol, butanol, isopropanol and the like can be used as a solvent. In addition, in order to control the gelation rate and uniformity, it is possible to adjust the temperature or stirring speed in the process.

The surface modification of step (c) may be performed by adding a metal oxide gel to an organic solvent and adding an organosilane. In this case, ethanol, butanol, hexane, or the like may be used as the organic solvent. The organosilane may be selected from the group consisting of trimethylchlorosilane (TMCS), hexamethyldisilazane (HNDS), methyltrimethoxysilane, and trimethylethoxysilane. It is preferable to put the metal oxide lubricating gel obtained through the above steps (a) and (b) in an organic solvent and add a predetermined amount of organosilane to perform surface modification. And the rate of modification and the hydrophobicity of the surface can be adjusted by adjusting the amount of the organic solvent or organosilane added.

The metal oxide gel in the step (d) is preferably dried at atmospheric pressure for 1 to 24 hours in a 60 ~ 200 ℃ drying oven, it is possible to obtain a desired pore size of the metal oxide by drying at a temperature and time within the above range. This is because the porosity may be lost if the temperature is drastically raised to a temperature higher than the temperature range or dried at a temperature higher for a longer time than the range of time. In addition, drying can use supercritical drying. When dried by supercritical drying, it has little surface tension and does not damage the product.

In addition, the method of preparing a metal oxide coated with the porous silica airgel may further include (e) firing the metal oxide coated with the silica airgel after step (d). The hydrophilicity and hydrophobicity of the compound can be controlled by firing the metal oxide coated with the silica airgel. The firing of the metal oxide coated with the silica airgel of step (e) is preferably carried out at a firing temperature of 400 to 800 ° C. for 1-24 hours. This is because it is possible to have hydrophilicity while maintaining the pores and the skeleton by removing the organic material having hydrophobicity on the silica gel surface. If it is lower than the temperature range, the organic matter is not removed, so it has hydrophobicity. If the temperature is higher than the temperature range, the skeleton may contract and damage the product.

On the other hand, the metal oxide coated with the silica aerogel prepared by the production method preferably has a porosity of 80 to 99% from the viewpoint of having sufficient thermal insulation to air. In addition, the crystal phase is anatase (anatase), the particle size may be 10 ~ 30nm, the specific surface area is preferably 300 ~ 1000 m ² / g, more preferably 400 ~ 800 m ² / g.

The metal oxide coated with the silica airgel is coated with a three-dimensional porous silica airgel around the metal oxide while maintaining the high photocatalyst activity of the metal oxide, thereby preventing direct contact between the metal oxide, the organic support, and the binder. It prevents the decomposition of the organic support and the binder, which was a problem in the photocatalyst. On the other hand, the metal oxide coated with the silica airgel has a specific surface area of the metal oxide coated with the silica airgel in a three-dimensional mesh structure around the metal oxide, thereby effectively removing harmful substances than the conventional photocatalyst powder. Therefore, when manufacturing building materials using metal oxide coated with silica airgel and using them in medical institutions, homes, schools, etc., it is harmless to human body and constructs eco-friendly functional buildings and facilities with decomposing pollutants, purifying air, and removing odor. Makes this possible.

Colorant

The coloring agent in this invention uses a well-known coloring agent selectable by a person skilled in the art, Preferably it uses nitrite. Nitrite includes sodium nitrite and potassium nitrite. Nitrite is highly hygroscopic in crystalline powder or granular mass, soluble in water and oxidized slowly when left in air to turn into nitrate and decomposed upon heating at 320 ℃. It is also used for food addition. Nitrite is a color developing agent, unlike colorants, it is colorless and never colored by itself, but it fixes or stabilizes the color of mixed or contacted colored materials such as the pattern, shape of printing paper, or colored melamine resin. It enhances the decorative effect of the decorative plate by making the color of the decorative plate clear and beautiful while having a function of promoting color development by sharpening.

Dispersant  And plasticizers

The dispersant in the present invention uses a known dispersant that can be selected by a person skilled in the art, preferably ethyl alcohol. Plasticizers also use known dispersants that can be selected by a person skilled in the art, and preferably non-phthalate plasticizers, which are environmentally friendly plasticizers. Among the plasticizers, commercially available products include NONPCIZER and OLICIZER.

1.5 to 5 parts by weight of an air quality improvement functional composition is added to 100 parts by weight of the thermosetting melamine resin. The composition of the air quality improving functional composition includes 80 to 90 parts by weight of a metal oxide coated with a porous silica airgel having a three-dimensional network structure, 5 to 10 parts by weight of a dispersant, 2 to 5 parts by weight of a plasticizer, and 2 to 5 parts by weight of a colorant. If the air quality improvement functional composition is 1.5 parts by weight or less, the air quality improvement function is not satisfactory, and if 5 parts by weight or more, there is no obvious increase in the effect on air quality improvement, and the production cost can be increased.

The indoor air quality improvement functional furniture sheet of the present invention is manufactured by using a low pressure lamination method. Looking at the manufacturing method together with the cross-sectional view of the indoor air quality improvement functional furniture sheet of the present invention of Figure 2, the indoor air quality improvement functional melamine resin solution of claim 1 is penetrated to the cosmetic printing paper and one to three kraft paper. Making a step; Firstly drying the cosmetic printing paper and the kraft paper in which the melamine resin solution has penetrated through the heat chamber maintained at a temperature of 70 to 80 ° C. for 80 to 100 seconds; Stacking and laminating the primary dried cosmetic printing paper and kraft paper; Preparing a cosmetic sheet by pressing the laminated printing paper and kraft paper at a temperature of 90 to 100 ° C. at 1 to 1.5 atm for 90 to 100 minutes; And a temperature of 190-220 ° C. and a pressure of 22-28 kgf / cm ² after closely contacting the cosmetic sheet to the adherend. It is characterized in that it provides a method for producing indoor air quality improvement functional furniture sheet, comprising the step of pressurizing and heat treatment for 25 to 35 minutes under. The indoor air quality improvement functional furniture sheet manufacturing method of the present invention can reduce the steps of the manufacturing process by using a low pressure lamination method (Low Pressure Lamination) and brings the indoor air quality improvement effect by using the melamine resin solution.

The adherend is characterized in that the one selected from the group consisting of particle board (particle board), medium density fiber board (MDF), hard board (hardboard), gypsum board and plywood.

In this regard, the present invention will be described in detail through Examples. The following Examples and Comparative Examples illustrate the present invention in more detail, but do not limit the scope of the present invention.

<Preparation of toilet seat using functional melamine resin solution for improving indoor air quality>

Example  One

Metal oxides coated with porous silica airgel in three-dimensional network 96 parts by weight of an indoor air quality improvement functional composition including 8 parts by weight, 8 parts by weight of a dispersant, 4 parts by weight of a plasticizer, and 4 parts by weight of a coloring agent was prepared, and 1.5 kg of the functional composition was added to 100 kg of a thermosetting melamine resin. After preparing the melamine resin solution, a cosmetic sheet was prepared using low pressure lamination.

Example  2

Metal oxides coated with porous silica airgel in three-dimensional network 106 parts by weight of an indoor air quality improvement functional composition including 90 parts by weight, 8 parts by weight of a dispersant, 4 parts by weight of a plasticizer, and 4 parts by weight of a coloring agent was prepared, and 1.5 kg of the functional composition was added to 100 kg of a thermosetting melamine resin. After preparing the melamine resin solution, a cosmetic sheet was prepared using low pressure lamination.

Comparative example  One

16 parts by weight of a composition comprising 8 parts by weight of a dispersant, 4 parts by weight of a plasticizer, and 4 parts by weight of a coloring agent were prepared, and 1.5 kg of the composition was added to 100 kg of thermosetting melamine resin to prepare a melamine resin solution of the present invention, followed by low pressure lamination. The toilet seat was manufactured using the low pressure lamination method.

(Test result)

The test contents of Table 1 below were measured after the production of Examples 1, 2 and Comparative Example 1, and measured the amount of formaldehyde dissipation, KSM 1998-4 which is a method for measuring the amount of formaldehyde dissipation of building interior materials.

Test Items unit Example 1 Example 2 Comparative Example (Existing Product) Test Methods Formaldehyde Dispersion Average mg / L 0.3 0.3 0.5 KSM1998-4 Formaldehyde Dissipation Maximum mg / L 0.5 0.4 0.7 KSM1998-4

As can be seen from Table 1, Comparative Examples 1 and 2, which are the cosmetic sheets prepared according to the present invention, formaldehyde emission average values are 0.3 and 0.3, respectively, and formaldehyde emission average values are 0.5 and 0.4, respectively. It can be seen that formaldehyde dissipation is significantly suppressed as compared with Comparative Example 1 (existing product) having maximum values of 0.5 and 0.7.

Table 2 below is to test the removal rate of acetaldehyde after preparing Examples 1, 2 and Comparative Example 1. Looking at the specific test method (KCL-QA-821 gas bag B method (20HR)), i) cut the makeup sheets of Examples 1, 2, and 3 to 5 cm (width) x 5 cm (length), thickness 0.3 cm Pretreatment by irradiating with ultraviolet rays for 3 hours before the test, ii) preparing 4 PVL resin gas bags (made by Tokyo Theodorant) of 5 liter capacity, inserting the sample and encapsulating, and then preparing 90 μmol / mol of test gas, respectively. 3 liters were injected into each gas bag, and iii) two measured test gas concentration changes over 20 hours under lamp irradiation, and two measured test gas concentration changes over 20 hours without ram irradiation. The concentration of the test gas was measured using a gas detector tube, and the ultraviolet lamp was installed with two 20W blacklight lamps (Sanyo denki) and ultraviolet rays from the sample surface using an ultraviolet photometer (Konica-Minota UD-10, UD-360). The photometer was adjusted to 1.0 mW / cm ² and the laboratory temperature at the time of testing was 23 ° C. ± 5 ° C. Acetaldehyde removal rate was calculated according to the following equation.

% Removal rate = [(dark condition concentration average)-(light condition concentration average)] / (dark condition concentration average)

Dark condition: The condition not to irradiate lamp

Condition: Irradiation of lamp

Test Items unit Example 1 Example 2 Comparative Example 1 Test Methods Acetaldehyde Removal Rate % 75 77 0 KCL-QA-821
Gas Bag B Method (20HR)

As can be seen from Table 2, Comparative Examples 1 and 2, which are the cosmetic sheets prepared according to the present invention, have the acetaldehyde removal rate of 75% and 77%, respectively, compared to Comparative Example 1 (the conventional product) having the acetaldehyde removal rate of 0%. It can be seen that the acetaldehyde removal function is remarkable.

A: Cosmetic sheet P: Substrate
1: kraft paper 2: cosmetic printing paper

Claims (4)

delete delete In the manufacturing method of furniture sheet,
Metal oxide coated with porous silica airgel of three-dimensional mesh structure in 100 parts by weight of thermosetting melamine resin made by reacting 50 parts by weight of melamine with 50 parts by weight of formaldehyde. The indoor air quality improvement functional melamine resin solution which added 1.5-5 weight part of air quality improvement functional compositions which consists of 80-90 weight part, 5-10 weight part of dispersing agents, 2-5 weight part of plasticizers, and 2-5 weight part of coloring agents. Preparing;
Infiltrating the indoor air quality improving functional melamine resin solution on the cosmetic printing paper and one to three kraft papers;
Firstly drying the cosmetic printing paper and the kraft paper in which the melamine resin solution has penetrated through the heat chamber maintained at a temperature of 70 to 80 ° C. for 80 to 100 seconds;
Stacking and laminating the primary dried cosmetic printing paper and kraft paper;
Preparing a cosmetic sheet by pressing the laminated printing paper and kraft paper at a temperature of 90 to 100 ° C. at 1 to 1.5 atm for 90 to 100 minutes; And
Method of manufacturing an indoor air quality improvement functional furniture sheet comprising the step of pressing and heat-treating for 25 to 35 minutes under the temperature 190 ~ 220 ℃ and pressure 22 ~ 28 kgf / cm ² after the cosmetic sheet in close contact with the adherend. .
The method of claim 3,
The adherend is a particle board (particle board), medium-density fiber board (MDF), hard board (hardboard), gypsum board and the plywood board, characterized in that the manufacturing method of the indoor air quality improvement functional furniture sheet, characterized in that the one.

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