KR102614964B1 - Flame retardant panel for kitchen furniture using waste fiber - Google Patents

Abstract

It relates to flame-retardant furniture and kitchen furniture panels using waste fiber, for which a main panel is made of PB, MDF, or wood; and papermaking panels attached to both sides of the main panel; and, on the surface of each papermaking panel. It includes an impregnated sheet of either HPM or LPM sheet attached; and an AG film attached to the surface of the impregnated sheet, wherein an antibacterial paint layer is applied to the surface of the main panel, and the papermaking panel It consists of a papermaking and impregnation composition manufactured using a fiber material containing waste fibers, and the impregnation composition contains 20 to 30% by weight of triphenyl phosphate (TPP) and 50 to 60% by weight of aluminum hydroxide (Al(OH)3). % and 10 to 20% by weight of decabromodiphenylethane (DBDPE); and 80 to 90 mol% of a copolymer (poly(n-buthylacrylate)-b-poly(methylmethacrylate), PBA-PMMA) composed of 10 to 20% by weight of polybutylacrylate and 80 to 90% by weight of polymethyl methacrylate. It is made of silica surface-treated by mixing 10 to 20 mol% of silica particles, and the papermaking panel is characterized in that a waterproof layer is coated on the surface for waterproofing.

Description

Flame retardant panel for kitchen furniture using waste fiber}

The present invention relates to flame-retardant furniture and kitchen furniture panels using waste fibers that satisfy waterproofing, antibacterial properties, semi-incombustibility, and flame retardancy. More specifically, flame retardancy is strengthened through papermaking panels manufactured using waste fibers, and Antibacterial properties can be achieved through the antibacterial paint layer applied to the impregnated sheet and main panel, and a waterproof layer is coated on the surface of the papermaking panel to minimize changes in physical properties or shape when exposed to water. It relates to flame-retardant furniture and kitchen furniture panels using waste fiber, which are made by attaching AG film to the surface of an impregnated sheet to have the same low reflectivity.

Generally, kitchen furniture panels are used for kitchen sinks, cabinets, shelves, built-in closets, and furniture.

These kitchen furniture panels are usually made of wood such as raw wood, cut into panel shapes of a certain size, and then coated with a surface coating agent to prevent them from being distorted or bent by moisture.

In addition, in the case of synthetic wood, a finishing sheet (gravure printed or silk printed sheet) made of synthetic resin is attached to the surface to give it a beautiful appearance, and then a surface coating agent, etc.

The coating process prevents the panel from being deformed by moisture, etc.

Kitchen furniture mainly made of wood is relatively affected by moisture due to its material characteristics, and this moisture has the problem of causing mold or moths to grow within the furniture.

In general, it is said that it is preferable to use solid wood for kitchen furniture panels in terms of strength and other aspects, but since the wood itself has to be imported, not only is it against the national interest, but it is also expensive and has limitations in processability, which creates a significant burden. , Taking this into consideration, artificial wood or synthetic wood, which is made of wood materials such as plywood, MDF, etc., or particle board and is supplied at a relatively low price, is being widely used.

However, wooden materials such as MDF or particleboard are not nearly waterproof or moisture-proof, so they swell when exposed to moisture or water. As a result, the plate loses all of its unique functions and has no choice but to be discarded.

Considering that wood is almost always an imported material, disposing of boards like this is a waste of foreign currency and will also cause enormous damage to the national economy.

In addition, existing panels for kitchen furniture have the problem of being vulnerable to fire, so panels for kitchen furniture are required to prevent this.

Republic of Korea Patent No. 10-1787575

The present invention was developed in consideration of the above problems, and the first object of the present invention is to provide flame-retardant furniture using waste fiber that satisfies semi-incombustibility, flame retardancy and flame retardancy using papermaking panels manufactured using waste fiber, and The goal is to provide panels for kitchen furniture.

The second purpose of the present invention is to have antibacterial properties through an antibacterial paint layer applied to the impregnated sheet and main panel, and to minimize changes in physical properties or shape when exposed to water by coating the surface of the papermaking panel with a waterproof layer. Meanwhile, the aim is to provide flame-retardant furniture and kitchen furniture panels using waste fiber, which are made by attaching AG film to the surface of an impregnated sheet to have the same low reflectivity as that of general wooden furniture.

According to the characteristics for achieving the above-described object, the first invention relates to a flame-retardant panel for furniture and kitchen furniture using waste fiber, for which a main panel made of any one of PB, MDF, or wood; and, the main panel A papermaking panel attached to both sides of the panel; and an impregnated sheet of either HPM or LPM sheet attached to the surface of each papermaking panel; and an AG film attached to the surface of the impregnated sheet. An antibacterial paint layer is applied to the surface of the main panel, and the papermaking panel is made of a papermaking and impregnation composition manufactured using a fiber material containing waste fibers, and the impregnation composition is triphenyl phosphate (TPP) 20. Flame retardant consisting of 30 to 30% by weight, 50 to 60% by weight of aluminum hydroxide (Al(OH)3) and 10 to 20% by weight of decabromodiphenylethane (DBDPE); and 80 to 90 mol% of a copolymer (poly(n-buthylacrylate)-b-poly(methylmethacrylate), PBA-PMMA) composed of 10 to 20% by weight of polybutylacrylate and 80 to 90% by weight of polymethyl methacrylate. It is made of silica surface-treated by mixing 10 to 20 mol% of silica particles, and the papermaking panel is characterized in that a waterproof layer is coated on the surface for waterproofing.

The second invention, in the first invention, is characterized in that the fiber material is made of a fiber material polished through a beating process, and the papermaking panel is manufactured by impregnating the papermaking paper with the impregnating composition and then heat-pressing it.

In the third invention, in the first invention, the waterproof coating contains 45 to 55% by weight of acrylic resin, 0.5 to 15% by weight of urea resin, 05 to 15% by weight of crosslinking agent, 0.8 to 16% by weight of thickening agent, and 0.5 to 15% by weight of vinyl alcohol. It is characterized in that it consists of weight percent and residual water.

According to the flame-retardant furniture and kitchen furniture panel using waste fiber of the present invention, since papermaking panels are manufactured using waste fiber, there is an effect of reducing the processing cost of waste fiber and preventing environmental pollution.

In addition, since the flame retardant component contained in the impregnating composition of the papermaking panel is sufficiently impregnated into the paper, it has the effect of improving the flame retardancy of the papermaking panel.

In addition, the AG (Anti_Glare) film attached to the impregnated sheet can give the feel of luxurious kitchen furniture and also has the effect of preventing scratches on the furniture surface.

Additionally, the growth of bacteria can be prevented through the antibacterial paint layer applied to the impregnated sheet and main panel.

Figure 1 is a cross-sectional configuration of a panel for flame-retardant furniture and kitchen furniture using waste fiber of the present invention;
Figure 2 is a photograph showing the results of a direct combustion test on a test specimen manufactured using a membrane panel (a), a papermaking panel (b), and a wood panel (c) of the present invention.

The following objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided so that the disclosure will be thorough and complete and so that the spirit of the invention can be sufficiently conveyed to those skilled in the art.

Embodiments described and illustrated herein also include complementary embodiments thereof.

As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, 'comprise' and/or 'comprising' do not exclude the presence or addition of one or more other elements.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing specific embodiments below, various specific details have been written to explain the invention in more detail and to aid understanding. However, a reader who has sufficient knowledge in the field to understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known but are not significantly related to the invention are not described in order to prevent confusion in describing the invention.

Hereinafter, the flame-retardant panel for furniture and kitchen furniture using waste fiber according to the present invention will be described in detail along with the attached drawings.

Figure 1 is a cross-sectional diagram of a panel for flame-retardant furniture and kitchen furniture using waste fiber of the present invention, and Figure 2 is a cross-sectional view of a panel manufactured using a membrane panel (a), a paper panel (b), and a wood panel (c) of the present invention. This photo shows the results of a direct combustion test on a test specimen.

As shown in Figure 1, the present invention enhances flame retardancy through a papermaking panel manufactured using waste fibers, and also has antibacterial properties through an antibacterial paint layer applied to the impregnated sheet and the main panel, and also enables the papermaking panel to Flame-retardant furniture using waste fiber, which is made by coating the surface with a waterproof layer to minimize changes in physical properties or shape when exposed to water, while attaching AG film to the surface of the impregnated sheet to have the same low reflectivity as general wooden furniture. and a panel 100 for kitchen furniture.

The flame-retardant furniture and kitchen furniture panel (100) using waste fiber of the present invention is largely composed of four parts, which include the main panel (10), papermaking panel (20), impregnated sheet (30), and AG film. do.

-Main panel-

The main panel 10 may be made of any of PB (particleboard), MDF, or wood.

At this time, the surface of the main panel may be coated with an antibacterial paint layer 11.

Here, the antibacterial paint of the antibacterial paint layer 11 is based on the polyester polyol and alkyd polyol, polyisocyanate is used as a curing agent, and the additive is made by combining dioctyl phthalate (DOP) and dibutyl phthalate (DBP). You can.

Here, dioctyl phthalate (DOP) and dibutyl phthalate (DBP) function to provide flexibility, adhesion, cold resistance, and impact resistance to a coating film formed using an antibacterial paint.

Additionally, a combination of silica, aluminum stearate, and polyethylene wax can be used as matting agents to reduce the gloss of a film formed using an antibacterial paint.

-Pasture panel-

The papermaking panel 20 is made of a papermaking and impregnation composition manufactured using a fiber material containing waste fibers, and the main panel 10 is designed to satisfy semi-incombustibility, flame retardancy, and flame retardancy in the main panel 10. ) is attached to both sides.

In general, the papermaking panel 20 is manufactured by performing a papermaking process to produce paper made using fiber materials, impregnating the paper obtained through the papermaking process with an impregnating composition, and then thermocompression molding the paper, which is used to impart flame retardancy. For this purpose, the impregnation composition can be processed by adding a flame retardant.

The papermaking panel 20 of the present invention has a technical feature in that the flame retardant component is highly dispersed in the papermaking panel to improve flame retardancy by optimizing the components of the impregnation composition for manufacturing such conventional papermaking panels.

As a flame retardant contained in the impregnation composition, a flame retardant consisting of three components, triphenyl phosphate, aluminum hydroxide, and decabromodiphenylethane, is applied. The flame retardant performance of the papermaking panel can be improved by the combination of the above flame retardants. appear.

In particular, mixing each component of the flame retardant in an appropriate ratio can increase compatibility with the components constituting the papermaking composition. Therefore, even if the content of the flame retardant is increased, the impregnation process appears to be carried out smoothly. Compared to the general impregnation process, the impregnation process appears to be smooth. It has been shown that it can be impregnated with flame retardants.

The flame retardant constituting the impregnating composition is specifically a flame retardant consisting of 20 to 30% by weight of triphenyl phosphate, 50 to 60% by weight of aluminum hydroxide, and 10 to 20% by weight of decabromodiphenylethane, through which the phosphorus-based flame retardant, tri Good dispersibility can be secured during the impregnation process without agglomeration occurring due to phenyl phosphate or decabromodiphenylethane, a brominated flame retardant.

In addition, aluminum hydroxide, which constitutes the flame retardant, not only has a flame retardant effect, but also improves bonding strength by increasing the hydrophilicity of the fiber material making up the paper.

It is preferable to use each component constituting the flame retardant by classifying it into a particle size of 50 to 150㎛. This is taken into consideration the dispersibility within the fiber material constituting the papermaking, and if the particle size is too small, it may be contained within the fiber material during the impregnation process. Since the amount of unreacted powder that is not dispersed increases and sufficient impregnation is not achieved even if it is too large, it is preferable to classify and use it so that it falls within the above size range.

In addition, the impregnation composition contains silica. In particular, the dispersibility and moldability of the flame retardant are improved by using silica surface-treated with a copolymer of polybutylacrylate and polymethyl methacrylate. The polymethyl methacrylate copolymer is graft-copolymerized with silica particles to form surface-treated silica particles.

These surface-treated silica particles act as a kind of dispersant, and due to the hydrophilic nature of silica bonded to the end of the copolymer, it has been shown that the flame retardant is quickly dispersed within the fiber material that makes up the paper and promotes adsorption.

Copolymers of polybutylacrylate and polymethyl methacrylate are used as coating agents in the case of copolymers containing butylacrylate and methyl methacrylate in a weight ratio of 1:1, and when the butylacrylate content is more than 90% by weight. It is known that it can be used as an adhesive. That is, the physical properties of the copolymer may vary depending on the composition ratio of the copolymer.

In the present invention, as a copolymer of polybutylacrylate and polymethyl methacrylate, a copolymer composed of 10 to 20% by weight of polybutylacrylate and 80 to 90% by weight of polymethyl methacrylate is used. In addition, in order to form a graft copolymer by adding silica to the copolymer, 10 to 20 mol% of 01 to 05㎛ silica particles are added to 80 to 90 mol% of the copolymer of polybutylacrylate and polymethyl methacrylate. Surface-treated silica can be produced by mixing the copolymer and silica particles as much as possible and grafting the copolymer.

That is, the impregnation composition includes the steps of preparing a copolymer of polybutylacrylate and polymethyl methacrylate, mixing silica particles into the copolymer to prepare surface-treated silica, and mixing a flame retardant into the silica. It can be manufactured including.

In addition, the impregnation composition consists of 30 to 40 parts by weight of polybutylacrylate and polymethyl methacrylate copolymer, 10 to 20 parts by weight of surface-treated silica, and 50 to 60 parts by weight of a flame retardant, and 50 to 60 parts by weight of water for smooth impregnation. It is used by adding 200 parts by weight to form an aqueous solution. Additionally, in order to impart color to the papermaking panel, an inorganic pigment may be added during the process of manufacturing the impregnation composition.

The surface-treated silica particles are prepared by reacting polybutylacrylate and silica particles in the presence of copper bromide (CuBr2) and ascorbic acid to prepare silica particles surface-treated with polybutylacrylate, and methyl methacrylic is added to the silica particles again. By adding a rate and reacting in the presence of copper bromide, silica in the form of polybutylacrylate and polymethyl methacrylate copolymer surface-treated silica particles can be obtained.

Thereafter, a flame retardant is added to the prepared silica and stirred to obtain an impregnation composition.

Paper is impregnated with the impregnating composition obtained as above, and the paper can be obtained by applying a normal papermaking process using a fiber material containing waste fibers.

In Korean Patent Publication No. 10-2018-0107524, papermaking is made by mixing a papermaking composition containing a flame retardant with a fiber material in the papermaking process to produce a semi-incombustible papermaking fiberboard, and the produced paper is again impregnated with a flame retardant. A process of impregnating the composition is applied. Although it is possible to increase the flame retardant content inside the papermaking process by introducing the flame retardant twice, there is a problem in that if the flame retardant is included in the papermaking process, the durability of the papermaking itself decreases, resulting in process defects.

The present invention, unlike the process of the prior art, manufactures paper through a normal papermaking process and then introduces a flame retardant into the papermaking fibers only through an impregnation process. In addition, the ingredients and content of the impregnation composition for the impregnation process are being optimized so that sufficient flame retardant effect can be achieved through this process alone.

The fiber material uses waste fibers. The waste fibers may be natural fibers or synthetic fibers selected from cotton, pulp, polyester, and polypropylene, or may be used as mixed fibers. Additionally, waste fibers and regular fibers can be mixed and used.

Additionally, prior to performing a papermaking process using the fiber material, the fiber material may be polished through a beating process. In the beating process, the fiber material is ground into a fine powder, placed in a water bath, and polished for 2 to 3 hours.

In this way, papermaking is made using the polished fiber material, which is a process of dehydrating and drying the fiber material, and normal papermaking processes such as stratum formation, compression dehydration, drying, and surface treatment can be applied. In other words, the fiber material ejected from the head box is introduced into the wire section to form paper, then goes through a pressing and dehydration process in the pressing section, the remaining moisture is evaporated in the drying section, and then the thickness of the paper is adjusted in the calendar to complete the paper making process. .

The paper can be manufactured to have a thickness of 1 to 5 mm. If the thickness of the paper is too thick, impregnation of the flame retardant in the subsequent impregnation process will not be smooth, and if the thickness is too thin, damage to the paper may occur in the subsequent process, so it is preferable to manufacture it so that it falls within the above thickness range.

The impregnation process involves putting the paper into an impregnation tank containing the impregnation composition, impregnating it while passing through a compression guide roller installed in the impregnation tank, and then pressurizing it with a steel compression roller to proceed with the impregnation process while reducing the moisture content of the paper. . In addition, so that the components of the impregnating composition can penetrate into the fibers constituting the papermaking, it can be impregnated while pressing using a roller made of engraving and embossing as the guide roller, and drying the flame-retardant papermaking panel obtained after the impregnation process. The process can be performed.

Additionally, the flame-retardant papermaking panel can be thermo-compressed and molded using a thermo-compressor. The thermocompression molding is a flat thermocompression molding, through which the smoothness and stability of the fibers that make up the papermaking can be maintained. When performing the thermocompression molding process, a mold may be attached to the top of the thermocompressor to form various patterns on the surface of the flame-retardant papermaking panel.

It can be manufactured in the form of a laminated sheet or board by performing such thermocompression molding or performing a lamination process of lamination of two or more dried flame-retardant papermaking panels. The upper paper lamination process may be performed by stacking 2 to 6 sheets depending on the use of the flame-retardant papermaking panel. In addition, for the above lamination process, adhesive can be applied to the surface of the flame-retardant papermaking panel to be laminated and then laminated to adhere. If the lamination process is performed in this way, the thickness can be adjusted to 2 to 30 mm, so it can be used as a material for kitchen furniture panels.

The effect on the papermaking panel of the present invention will be explained.

[Example]

To manufacture the flame-retardant papermaking panel 20, waste cotton fibers with an average length of 40 mm were pulverized, 100 parts by weight of the pulverized material was put into a water tank, and a beating process was performed for 2 hours.

The obtained waste fibers were put into a headbox, and the waste fibers ejected from the headbox formed a stratum in the wire portion. This was pressed and dehydrated in the pressing section, the remaining moisture was evaporated in the drying section, and then passed through a calendar to produce paper with a width of 1,000 mm, a length of 2,500 mm, and a thickness of 2 to 25 mm.

The papermaking was put into an impregnation tank where the impregnation composition was stored, and pressurized with a steel compression roller through a guide roller installed in the impregnation tank to produce a flame-retardant papermaking panel and first dried. The first dried flame-retardant papermaking panel was heat-compressed at 180°C and a temperature and pressure of 200kg/cm2 for 3 minutes to obtain a flame-retardant papermaking panel with a thickness of 2mm.

At this time, the impregnation solution was prepared by mixing an impregnating composition consisting of 60 parts by weight of a flame retardant, 15 parts by weight of silica, and 35 parts by weight of a copolymer of polybutylacrylate and polymethyl methacrylate with 100 parts by weight of water.

At this time, the flame retardant was used as a mixture of 24% by weight of triphenyl phosphate, 58% by weight of aluminum hydroxide, and 18% by weight of decabromodiphenylethane, and the butylacrylate/methyl methacrylate copolymer was 15% by weight of BA and 85% of MMA. A copolymer composed in weight percent was used.

[Comparative example]

For comparison, the same impregnation process as in the example was performed, but a composition of 80 parts by weight of liquid potassium silicate, 30 parts by weight of ultracarb, and 20 parts by weight of diatomaceous earth mixed with 100 parts by weight of water was used.

Direct combustion experiments were conducted on the flame-retardant papermaking panel 20 according to Examples and Comparative Examples and a conventional wood panel. As a result, as shown in FIG. 2(b), the flame-retardant papermaking panel 20 of the example was found to have excellent flame retardancy as it did not burn even when sprayed with direct fire. In contrast, the flame retardant papermaking panel 20 according to the comparative example showed flame retardancy as shown in FIG. 2(a), and the degree of ignition was weaker than that of the conventional wood panel (FIG. 2(c)), but was found to be more severe than that of the example. It was determined that these results were because a large amount of flame retardant components were contained in the papermaking panel through the impregnation process of the present invention.

-Waterproof layer-

The waterproof layer 21 functions to minimize changes in physical properties or shape when the papermaking panel 20 is exposed to water, and is coated on the surface of the papermaking panel 20.

This waterproof layer 21 may be composed of 45 to 55% by weight of acrylic resin, 0.5 to 15% by weight of urea resin, 0.5 to 15% by weight of crosslinking agent, 0.8 to 16% by weight of thickening agent, 0.5 to 15% by weight of vinyl alcohol, and the balance water. .

Here, a wax emulsion was mixed to provide moisture resistance to the urea resin, but in the present invention, acrylic resin, crosslinking agent, thickener, and vinyl alcohol are mixed with urea resin and water.

If the acrylic resin content is less than 45% by weight, moisture resistance is poor, and if it exceeds 55% by weight, the surface is strengthened and there is a problem that wood does not come into contact.

In addition, if the urea resin content is less than 0.5% by weight, the curability is low and waterproofing effect cannot be expected, and if it exceeds 15% by weight, the strength increases, making post-processing with a water-based adhesive difficult.

In addition, if the content of the crosslinking agent is less than 0.5% by weight, the crosslinking properties are weak and may reduce waterproofness, and if the content is more than 15% by weight, it may cause changes in physical properties, which is not desirable.

In addition, the thickener is added to adjust viscosity depending on workability, and its content can be adjusted within the range of 0.8 to 16% by weight.

In addition, vinyl alcohol is added to promote drying. If it is less than 0.5% by weight, drying properties are poor, and if it is more than 15% by weight, the cost increases and it is unproductive.

The rest can be obtained by mixing the remaining water to obtain a waterproofing agent.

The waterproofing agent obtained in this way is coated on the surface of the papermaking panel 20 to form a waterproofing layer 21, and the waterproofing and moisture-proofing function of the kitchen furniture panel can be imparted through the waterproofing layer 21.

-Impregnated Sheet-

The impregnated sheet 30 may be either an HPM or LPM sheet attached to the surface of each papermaking panel 20.

The impregnated sheet 30 in the embodiment of the present invention may be composed of an LPM sheet.

The LPM sheet is attached to the surface of each papermaking panel 20, and is manufactured to have antibacterial properties by impregnating patterned paper with various colors and patterns printed on it in an antibacterial solution containing cuprous oxide added to urea resin.

These LPM sheets not only function to sterilize and prevent the growth of bacteria and mold, but can also have surfaces with glossy, matte, embossed, and wood grain patterns, and can have surface properties such as wear resistance, heat resistance, fire resistance, and acid resistance. there is.

-AG Film-

The AG (Anti_Glare) film 40 is attached to the surface of the impregnated sheet 30 to create a luxurious kitchen furniture feel, and has an additional function of preventing scratches on the surface.

This AG film 40 functions to provide a low-reflection function by forming a haze pattern 32 obtained by curing resin on the surface of the PET film 31.

In the above, the AG film 40 may be attached to the surface of the impregnated sheet 30 through adhesive or press compression method.

Therefore, the flame-retardant furniture and kitchen furniture panel 100 using waste fiber of the present invention can easily implement low reflectivity and various colors and designs.

Since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, various equivalents can be substituted for them at the time of filing the present application. It should be understood that there may be variations.

10: Main panel 11: Antibacterial paint layer
20: Paper panel 21: Waterproofing layer
30: Force needle sheet
40: AG film 31: PET film 32: Haze pattern
100: Flame-retardant furniture and kitchen furniture panels using waste fiber

Claims (3)

Main panel (10) made of either PB or MDF or wood;
Papermaking panels 20 attached to both sides of the main panel;
An impregnated sheet (30) of either HPM or LPM sheet attached to the surface of each papermaking panel (20);
It includes an AG film (40) attached to the surface of the impregnated sheet (30),
An antibacterial paint layer 11 is applied to the surface of the main panel 10,
The papermaking panel 20 is made of a papermaking and impregnation composition manufactured using a fiber material containing waste fibers,
The impregnating composition includes a flame retardant consisting of 20 to 30% by weight of triphenyl phosphate (TPP), 50 to 60% by weight of aluminum hydroxide (Al(OH)3), and 10 to 20% by weight of decabromodiphenylethane (DBDPE); and 80 to 90 mol% of a copolymer (poly(n-buthylacrylate)-b-poly(methylmethacrylate), PBA-PMMA) composed of 10 to 20% by weight of polybutylacrylate and 80 to 90% by weight of polymethyl methacrylate. It is made of surface-treated silica by mixing 10 to 20 mol% of silica particles,
The papermaking panel (20) is a flame-retardant furniture and kitchen furniture panel using waste fiber, characterized in that the surface is coated with a waterproof layer (21) for waterproofing.
According to paragraph 1,
The fiber material is made of fiber material polished through a beating process,
The papermaking panel (20) is a flame-retardant furniture and kitchen furniture panel using waste fiber, characterized in that it is manufactured by impregnating the papermaking with the impregnating composition and then heat-compressing it.
According to paragraph 1,
The waterproof layer 21 is characterized by being composed of 45 to 55% by weight of acrylic resin, 0.5 to 15% by weight of urea resin, 05 to 15% by weight of crosslinking agent, 0.8 to 16% by weight of thickening agent, 0.5 to 15% by weight of vinyl alcohol, and the remaining water. Flame-retardant furniture and kitchen furniture panels using waste fiber.

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