KR20070093755A - Functional and non-flammability inorganic paint and preparing method of non-flammability board using the same - Google Patents

Abstract

A functional and nonflammable inorganic paint composition and a method for manufacturing a nonflammable board using the same are provided to impart flame retardancy and far infrared ray and anion-releasing functions to an inflammable board. A functional and nonflammable inorganic paint composition comprises 50-250 parts by weight of expanded vermiculite, 1-20 parts by weight of kiyoseki stone, 25-75 parts by weight of natural dye minerals, 1-20 parts by weight of an inorganic crosslinker/adhesive, 700-1100 parts by weight of sodium silicate, and 70-110 parts by weight of water. A method for manufacturing a nonflammable board using the paint composition includes the steps of: providing the functional and nonflammable inorganic paint composition; grinding minerals in the functional and nonflammable paint composition into powder(200mesh or smaller), and then mixing the powder with the other components; spraying the nonflammable paint onto a MDF with a thickness of 3-30mm in an amount of 2-5kg/cm^2; drying the MDF in a dryer that blows hot air of 80-100°C in a rate of 4.5-6.0m/sec; and coating the surface of the MDF with hot melt films.

Description

Functional and flame retardant inorganic paints and method for producing flame retardant plate using the same {Functional and non-flammability inorganic paint and preparing method of non-flammability board using the same}

Figure 1 is a block diagram schematically showing a process for producing an adhesive for a flame retardant inorganic paint used in the present invention.

Figure 2 is a block diagram schematically showing a process for producing a flame retardant sheet according to the present invention.

The present invention relates to a functional and flame retardant inorganic coating composition and a method for manufacturing a flame retardant plate using the same, and more specifically, by developing a paint using natural minerals in MDF without flame retardancy and applying it to MDF, as well as far-infrared radiation and anion It relates to a functional and flame retardant inorganic coating composition for releasing and a method for producing a flame retardant plate using the same.

MDF (Medium Density Fiberboard) is a wood panel product with a density of 0.4 ~ 0.8g / cm3 manufactured by applying heat and pressure by grinding wood or wood to obtain wood fiber and mixing it with synthetic resin adhesive, and can produce from 3.0mm to 30mm thickness. It is wooden board. Since its appearance as a new generation wood board by Celotex in 1966, MDF succeeded in commercializing it as a furniture material in the early 1970s, and grew rapidly around the world in the 1980s.

At present, the use of MDF in our country is about 60% for general furniture, 15% for musical instruments, office furniture and electronics cases, about 10%, respectively. Recently, the demand for MDF is expanding to floorboards and building interiors. In recent years, as the world's environmental and resource problems have increased, MDF manufacturing facilities in our country have been rapidly expanded. As a result, MDF and plywood are making efforts to develop alternative demands and develop new demands. MDF as a building material is expected to increase as the preference for wood and wood as main materials such as floorboards and interior materials is increasing. It is expected to expand further.

However, MDF or plywood is a plate manufactured by compressing and molding wood chips using an organic adhesive, which is the most widely used building finishing and interior material, but these materials are not flame retardant, such as easily ignited by a flame. It is a material, and there is a method of using an inorganic adhesive instead of an organic adhesive to improve it, but the product manufactured in this way is less productive due to delamination and breakage, and only the adhesive is inorganic, and the main material is a combustible wood chip. It is not commercialized due to problems such as non-combustibility and flame retardancy.

In order to make up for such drawbacks, efforts have been made to secure flame retardancy through the application or application of flame retardant paints or thin plates, but there is no economical and flame retardant building finishing and interior MDF.

On the other hand, gypsum boards with flame retardancy require alternative materials to replace gypsum as the main ingredient gypsum material itself is heavy and cannot be processed for finishing. As materials have not been developed, there are currently no economical and flame retardant building finishes and interior materials.

Other materials may be mentioned cement boards, which were developed by adding various materials to the cement. In terms of its characteristics, first of all, lightweight materials such as paper particles, pearlite, styrofoam particles, vermiculite and bottom ash are used, and most of them mix some or two or more of these materials according to their composition ratio. As a result, the development of a method of adding various additives is dominant.

However, most of them have only a slight difference in the properties of the cement board, but do not give a fundamental change in the properties are used as a part of the exterior or ceiling rather than the building finishing and interior materials.

In general, sandwich panels, which are widely used as construction and industrial materials, are easily used and inexpensive, and are used in factory buildings, restaurants, general houses, mall buildings, and the like. It is used after filling in the steel plate. However, when the organic insulating material such as styrofoam is filled and used, when the fire occurs due to a short circuit or static electricity, the high temperature and toxic gases that are fatal to the human body are discharged by the smoke caused by the combustion of the styrofoam, which makes it difficult to extinguish the fire. It has a problem that can cause personal injury.

Recognizing this problem, the Ministry of Construction and Transportation enacted a regulation on securing non-combustible performance of sandwich panels in October 2004, excluding composite materials such as sandwich panels (non-combustible materials + non-combustible materials) as examples of non-combustible materials. Can be used only if the performance meets the test result criteria of the Korean Industrial Standard (KS F 2271).

In addition, glass asbestos, rock wool and the like used as an inorganic insulating material has a problem that can cause various skin diseases by causing irritation when contacted with the skin of the worker during construction. Gypsum board, which is used as interior materials of buildings, has the advantages of low cost and convenient construction as non-combustible materials, but contains harmful components to the human body, which impairs the health of workers during construction and its handling is difficult due to its weight. It is inconvenient and has a problem of poor workability.

As the interest in flame-retardant construction materials has increased due to the strengthening of legal regulations due to the problems of the existing building insulation materials, flame-retardant construction materials using main materials such as flame-retardant or non-combustible building materials using magnesium and vermiculite, which are expandable minerals, and magnesium have been developed and marketed. It is sold to.

However, fire-retardant or non-combustible boards based on vermiculite and pearlite use ocher, liquid sodium silicate, and starch as adhesives.The production process is mainly mixing raw materials of expanded minerals and adhesives, press compression molding, and drying. Consists of

When using ocher as an adhesive, light weight is inferior and it contains a lot of water, so the drying or firing time is long and the drying process is very large, and the product may be warped during forced drying. In addition, when the liquid sodium silicate is used as an adhesive, the moldability is excellent, but product deterioration of the product due to humidity such as surface staining may occur when moisture is contacted. In addition, there is a limit to the surface roughness and the diversification of colors, which are intrinsic properties of minerals, and if the strength is increased, the input amount of the raw material is increased, thereby reducing the economic efficiency.

In addition, magnesium-based boards are excellent in fire resistance and moisture resistance, but require no diversification of colors such as far-infrared radiation and anion emission, and diversification of colors and reworking of surfaces when used as a building interior finishing material. In addition, some of these products are known to have the functionality of far-infrared radiation, but are not comparable to the functional ceramics produced in the past.

On the other hand, there are many natural mineral paints that are part of the market for flame retardant construction materials. Most of them are made of vermiculite and pearlite powder, and they are used for insulation of building's underground parking lot, freezing warehouse and drying furnace. Although it is effective, there are many technical issues to be solved, such as color diversification, surface treatment, and addition of functionality.

The flame retardant industry has been active due to the revision of the fire law, and multi-use companies such as general restaurants, karaoke rooms, room salons, jjimjilbangs, Koshiwon, PC rooms, video rooms, game halls, pubs, inns, institutes, massage parlors, etc. Although many paints are released on the market, there are many questions about its safety, such as the generation of toxic gases in case of fire.

Accordingly, an object of the present invention is to provide a functional and flame retardant inorganic coating composition having the ability to emit far infrared radiation and anion as well as flame retardant by developing a coating using natural minerals in MDF without flame retardancy.

Another object of the present invention is to provide a method for producing the functional and flame retardant inorganic coating composition.

Functional and flame-retardant inorganic coating composition of the present invention for achieving the above object is 50 to 250 parts by weight of expanded vermiculite, 1 to 20 parts by weight of precious stones, 25 to 75 parts by weight of natural dye minerals, 1 to 20 parts by weight of inorganic crosslinking / adhesives It is composed of 700 to 1100 parts by weight of sodium silicate and 70 to 110 parts by weight of water.

Method for producing a flame retardant plate using the functional and flame retardant inorganic paint composition for achieving another object of the present invention is 50 to 250 parts by weight of expanded vermiculite, 1 to 20 parts by weight of precious stone, 25 to 75 parts by weight of natural dye minerals, inorganic Providing a functional and flame retardant inorganic coating composition consisting of 1 to 20 parts by weight of crosslinking / adhesive agent, 700 to 1100 parts by weight of sodium silicate and 70 to 110 parts by weight of water; Pulverizing the mineral in the functional and flame retardant inorganic coating composition to 200 mesh or less, and then mixing with the remaining components; Spraying the flame retardant paint at 2 to 5 kg / cm < 2 > Drying the MDF in a dryer for discharging hot air at 80 to 100 ° C. at 4.5 to 6.0 m / sec; And coating the surface of the MDF with a hot melt film.

Looking at the present invention in more detail as follows.

As described above, the composition of the flame retardant paint according to the present invention is prepared by mixing expanded vermiculite, precious stone, natural dye mineral and inorganic crosslinking / adhesive, sodium silicate and water. At this time, all the minerals are pulverized using 200 millimeters or less of standard sieve 200 mm diameter by KS A 5101.

The expanded vermiculite may be commercially available, and is used in terms of rising insulation and flame retardant effects. Its use amount is preferably 50 to 250 parts by weight, and if the amount is less than 50 parts by weight, there is a disadvantage that the heat insulation and flame retardant effect is reduced. When the amount is more than 250 parts by weight, the powder is not sprayed well and the adhesiveness tends to be lowered. have.

The ear citrine is used for the purpose of giving an anion emission and far-infrared radiation effect, and the ear citrine, which emits an average of 8,000 or more anions, is preferable in terms of economics in manufacturing paints. It is preferably used in an amount of 1 to 20 parts by weight, and when the amount is less than 1 part by weight, the amount of anion released when coating the paint is less than 500 / cc, which is not competitive with the level of a general ceramic tile, and when it exceeds 20 parts by weight, the amount of anion released There is a tendency that it is not economical because it is discharged almost constant at 1,300-1,400 pieces / cc.

The natural dye minerals are added to express various colors of paint, depending on the intensity and mixing of colors such as turquoise, light yellow, dark yellow, light brown, dark brown, ocher, white, pink, reddish brown, light gray, dark gray, etc. Countless colors can be derived. Its amount is preferably 25 to 75 parts by weight, and if the amount is less than 25 parts by weight, it is similar to the color of vermiculite, which has a disadvantage of not exhibiting a natural dye mineral inherent color. have.

The inorganic crosslinking / adhesive agent provides sufficient adhesive strength, waterproofness, and flame retardancy to the natural mineral or inorganic material when the flame retardant natural mineral is applied to a plate such as MDF that is not flame retardant or when the plate is manufactured from the flame retardant inorganic material itself. It is used as, the component is composed of Na ₂ O, SiO ₂ , kaolin (kaolin), Vermiculite, MgSO ₄ and NaOH.

In the present invention, the Na ₂ O is used for the purpose of viscosity control, the amount thereof is preferably 5 to 25% by weight. If the amount is less than 5% by weight, there is a disadvantage in that the viscosity of the adhesive is lowered, and if it exceeds 25% by weight, the viscosity is too high and the residual solids tend to increase after the reaction.

The SiO ₂ plays a role of specific gravity control and viscosity control, the amount is preferably from 25 to 45% by weight. If the amount is less than 25% by weight, the viscosity is increased, but the specific gravity is lowered, so that the adhesive strength is lowered. If the amount is more than 45% by weight, the specific gravity and viscosity are increased, but residual precipitated solids tend to increase.

The kaolin is used for the purpose of adjusting the adhesion, the amount thereof is preferably 1 to 20% by weight. If the amount used is less than 1% by weight, there is a disadvantage in that the adhesive strength is lowered. If the amount is more than 20% by weight, the adhesive strength is increased, but a uniform coating effect may not be obtained during spray coating.

The vermiculite is used for the purpose of adjusting the adhesive force, the amount thereof is preferably 0.1 to 15% by weight. If the amount of use is less than 0.1% by weight, there is a disadvantage in that the adhesive strength is lowered. If the amount is more than 15% by weight, the adhesive strength is increased, but the fine residual solids increase, which tends to cause difficulty in filtration.

The MgSO ₄ is used for the purpose of enhancing the strength of the adhesive, the amount thereof is preferably 0.1 to 10% by weight. If the amount is less than 0.1% by weight, the adhesive strength is weak, there is a disadvantage that the coating falls well, if it exceeds 10% by weight the adhesive strength is enhanced but the adhesive tends to gel easily.

The NaOH is used for the purpose of the melting accelerator of the minerals, the amount is preferably 20 to 50% by weight. If the amount is less than 20% by weight, there is a disadvantage in that the meltability is low, the residual precipitates increase, and the adhesion effect is low. When the amount is more than 50% by weight, the effect of promoting the melting is almost constant.

The composition of the present invention is firstly _{5 to} 25% Na ₂ O, 25 to 45% SiO ₂ , 1 to 20% Kaolin, 0.1 to 15% Vermiculite, 0.1 to 10% MgSO ₄ and 20 to 40% NaOH 100 parts by weight of the component consisting of% and 150 to 250 parts by weight of water are mixed. In this case, when the amount of water used is less than 150 parts by weight, the reactants are solidified, so that production of the liquid adhesive is difficult. When the amount of water exceeds 250 parts by weight, the melting reaction of the minerals is low, and thus the adhesion strength is lowered.

Then, if necessary, 0.001 to 10% by weight of liquid NaOH is used as the viscosity modifier of the composition. Therefore, the composition ratio of the final composition is _{5 to} 25% by weight Na ₂ O, 25 to 45% by weight SiO ₂ , 1 to 20% by weight kaolin, 0.1 to 15% by weight vermiculite, 0.1 to 10% by weight MgSO ₄ and 20 to NaOH It consists of 100 parts by weight of the component consisting of 50% by weight and 150 to 250 parts by weight of water.

On the other hand, looking at the manufacturing method of the inorganic crosslinking / adhesive,

First, a component consisting of _{5 to} 25% by weight of Na ₂ O, 25 to 45% by weight of SiO ₂ , 1 to 20% by weight of kaolin, 0.1 to 15% by weight of vermiculite, 0.1 to 10% by weight of MgSO ₄ and 20 to 40% by weight of NaOH. In order to increase the specific surface area to improve the reaction efficiency, it is pulverized to 10 mesh or less and mixed well.

Then, 100 parts by weight of the component and 150 to 250 parts by weight of water are put in a reactor, and the reaction is performed for 2 to 5 hours while stirring at 200 to 400 rpm under a pressure of 15 to 25 kg / cm 2. At this time, when the pressure is less than 15㎏ / ㎠, the melting reaction rate of the minerals is slow and the amount of residual solids is increased, and when the pressure exceeds 25㎏ / ㎠, the melting reaction rate is fast, the amount of residual solids is reduced and a high viscosity adhesive can be produced. However, the reactor manufacturing cost may rise rapidly and operational hazards may occur, and if the stirring speed is less than 200 rpm, it is difficult to uniformly mix the input components in the reactor, the reaction rate is low, the amount of residual solids is increased, and it exceeds 400 rpm. If there is a viscosity, there is a risk of mechanical load.

After the reaction, the precipitate is allowed to settle for a predetermined time to remove the unreacted material, and the upper layer of the eluate is collected and filtered through a filter such as a nonwoven fabric. This process may be omitted depending on the state of the reactants.

On the other hand, a small amount of liquid NaOH sol is added while the filtered eluate is stirred at a temperature of about 60 to 90 ° C. at 50 to 70 rpm. This operation is repeated while measuring the viscosity, which is repeated until the viscosity reaches the desired application (for example, the application of natural minerals to a plate such as MDF without flame retardancy or the manufacture of a plate from a flame retardant inorganic material). An inorganic crosslinking / adhesive according to the invention is prepared. In this case, the amount of the NaOH sol used in the liquid is generally 0.001 to 10% by weight, and the crosslinking / adhesive shows excellent adhesion and waterproof performance.

The use amount of the inorganic crosslinking / adhesive agent is preferably 10 to 20 parts by weight, and if the amount is less than 10 parts by weight, the adhesive strength is low, so there is a disadvantage of flowing down after coating, and if the amount exceeds 20 parts by weight, the paint is not sprayed because the viscosity is too high. There is a tendency.

The sodium silicate is used for the purpose of increasing the adhesiveness and the flame retardant effect, the specific gravity of 1.40 is preferable in terms of not affecting the viscosity of the adhesive of the present invention when mixing, the amount of use thereof is preferably 700 to 1100 parts by weight. If the amount is less than 700 parts by weight, the concentration of the paint is too high when the raw material is mixed, there is a disadvantage that the nozzle is clogged, if it exceeds 1100 parts by weight the concentration is too thin, the paint tends to flow down.

In the present invention, the water is used for the purpose of controlling the concentration and preventing the coagulation of the adhesive is solidified, the amount thereof is preferably 70 to 110 parts by weight. If the amount is less than 70 parts by weight, the concentration is too thick, there is a disadvantage that the nozzle is clogged and a thin film is formed on the surface of the adhesive, and if it exceeds 110 parts by weight, the concentration and adhesive force is lowered and tends to flow after coating.

On the other hand, looking at the method for producing a flame retardant plate using the functional and flame retardant inorganic coating composition of the present invention,

First, the minerals such as the expanded vermiculite, precious stone, and natural dye minerals are pulverized to 200 mesh or less to enable spray coating, and then the inorganic crosslinking / adhesive and water are added to prepare a mixture at a stirring speed of 200 to 400 rpm. It was.

The manufacturing process of the flame-retardant plate using the flame-retardant paint prepared in this way is largely composed of three processes, such as coating process, hot air drying process, and surface coating process.

In the coating step, the flame-retardant paint is applied to the upper portion of the MDF having a thickness of 3 to 30 mm to a thickness of 0.2 to 0.5 mm, and sprayed at a pressure of a compressor of 2 to 5 kg / cm 2 to apply the whole coating. This process can be done by the operator using an air spray gun or by using an automatic paint booth. At this time, the reason why the coating thickness is 0.2 to 0.5 mm is for obtaining a secondary flame retardant effect, and the reason for setting the compressor pressure to 2 to 5 kg / cm 2 is for constant spraying of paint particles.

The hot air drying step is a step of drying in a dryer for discharging hot air at 80 to 100 ° C. at 4.5 to 6.0 m / sec. The drying time varies depending on the thickness of the coating. By drying using hot air in this manner, an effect of increasing the drying speed can be obtained.

The surface coating process is a process of adhering a hot melt film, for example, a PE melt hot melt film as a product completion process.

As described above, in the present invention, by developing a coating using natural mineral and applying it to the MDF, it was possible to manufacture a plate having a function of emitting flame retardancy as well as far infrared radiation and anion.

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited to the following examples.

Manufacture example 1

Manufacture of adhesives

Referring to FIG. 1, the composition of the raw material is Na ₂ O: SiO ₂ : Kaolin: Vermiculite: MgSO ₄ : NaOH = 15: 35: 10: 5: 5: 30 according to KS-A-5101 in g weight ratio. After mixing 200 mm or less of standard sieve diameter of 10 mm, put it in a reactor (Model JABR-010, JEIO B & P Co., Ltd.) with 200 g of water, and react for about 4 hours at 20 kg / cm 2, and then about 2 After settling for a time, the upper part of the eluate is collected and filtered. 50% (W / V) NaOH solution was added little by little, stirring the filtered eluate at 80 degreeC and 60 rpm. This operation is repeated while measuring the viscosity, which is repeated until the viscosity is about 400 cps (20 ° C.) to complete the preparation of the inorganic crosslinking / adhesive. The role of the crosslinking / adhesive agent not only enhances the adhesive performance but also improves the waterproof performance.

Evaluation of adhesive performance was judged by visual inspection, such as whether the coating coating of a cut | disconnection part cut | disconnected cleanly or the coating coating fell, when the following flame-retardant paint was apply | coated and cut into the coating object (MDF).

In order to evaluate the waterproof performance of the finished adhesive, evenly apply the adhesive to the entire surface of the 100 × 100 × 6㎜ MDF, and then dry well, soak in water for 1 hour, then take out and wipe the surface well with a dry towel, before and after immersion The MDF weight was measured to obtain the results as shown in Table 1 below.

sample Size (mm) Initial weight (g) Weight after applying adhesive (g) Weight (g) after immersion in water for 1 hour Blank 100 × 100 × 6 53.7 - 59.8 Test body 100 × 100 × 6 53.8 55.2 55.9

As shown in the above results, when no adhesive was applied (a blank), water was absorbed by 10% or more of the weight of the test specimen, but the test specimen coated with the adhesive showed little absorption of water. In addition, the test specimens were easily damaged due to their weak strength after being immersed in water, but the test specimens showed no change in strength.

Example 1

Manufacture of flame retardant paints

The composition of the flame retardant paint is 150g of expanded vermiculite produced by micro vermiculite, 10g of ear feldspar which releases an average of 8,000 or more anions, 50g of natural dye mineral, 10g of inorganic crosslinking / adhesive prepared in Preparation Example 1, and specific gravity of 1.40. 900 g of sodium silicate and 90 g of water were mixed and used at a stirring speed of 300 rpm. At this time, all the minerals were pulverized with a diameter of 200 mm or less by Standard Sieve by KS A 5101 using a pulverizer, and natural dye minerals were mixed with loess and mica in a ratio of 1: 1. .

Example 2

Manufacture of Functional / Flame Retardant MDF

Referring to Figure 2, the manufacturing process of the functional / flame retardant MDF of the present invention is largely composed of three processes, such as coating process, hot air drying process, surface coating process.

In the coating process, the flame-retardant paint was sprayed five times using an Air Spray Gun at an air spray gun at 3.5 kg / cm 2 on top of the MDF having a thickness of about 20 mm.

In the hot air drying step, the air was dried for 20 minutes in a dryer that discharges about 90 ° C. hot air at 5 m / sec.

In the surface coating process, a hot melt film made of PE was adhered as a product completion process.

Flame retardant performance of the finished product was carried out by the test method of KS F 2271, the results shown in Table 2 below it was able to obtain the effect of flame retardant class 2.

Test Items result Test Methods One 2 3    Flame retardant    Surface test Melting over the entire thickness none none none    KS F 2271: 1998 Arsonary Harmful Deformation none none none Crack on back side (mm) 0.2 0.0 0.2 Afterglow (seconds) 30 32 30 Coefficient of Smoke (C _A ) 42 45 43 Temperature time (℃ × min) Within 3 minutes 0 0 0 After 3 minutes 65 62 60

Meanwhile, in order to understand the functionality of the finished product, the emissivity (5 to 20 ㎛) was measured using a far-infrared spectrophotometer (FT-IR, Model: Bruker (Germany), IFS88), and the emission energy was measured as 0.963. It was measured at 3.76 × 10 ² W / m ² .

In addition, to measure the anion of the surface using a portable anion measuring device (COM-3010PRO) 8 times in a continuous measurement for 20 seconds to derive an average value, 1,340 / 음이온 anion was released.

As described above, the functional and flame retardant inorganic coating composition according to the present invention is a paint using a natural mineral, by applying it to the MDF can be produced a plate having the functionality of emitting far infrared radiation and anion as well as flame retardant.

Claims (4)

50 to 250 parts by weight of expanded vermiculite, 1 to 20 parts by weight of precious stones, 25 to 75 parts by weight of natural dye minerals, 1 to 20 parts by weight of inorganic crosslinking / adhesive, 700 to 1100 parts of sodium silicate and 70 to 110 parts by weight of water. Functional and flame retardant inorganic coating composition, characterized in that configured. The inorganic crosslinking agent according to claim 1, wherein the inorganic crosslinking / adhesive is _{5 to} 25 wt% Na ₂ O, 25 to 45 wt% SiO ₂ , 1 to 20 wt% kaolin, 0.1 to 15 wt% vermiculite, 0.1 to 10 wt% MgSO _4. A functional and flame retardant inorganic coating composition comprising 100 parts by weight of components consisting of 20% by weight and 20 to 50% by weight of NaOH and 150 to 250 parts by weight of water. [Claim 2] The functional and flame retardant inorganic coating composition according to claim 1, wherein the ear cacti has an average of 8,000 anions or more released thereon, and the specific gravity of sodium silicate is 1.40. Providing a functional and flame retardant inorganic coating composition according to any one of claims 1 to 3; Pulverizing the mineral in the functional and flame retardant inorganic coating composition to 200 mesh or less, and then mixing with the remaining components; Spraying the flame retardant paint at 2 to 5 kg / cm < 2 > Drying the MDF in a dryer for discharging hot air at 80 to 100 ° C. at 4.5 to 6.0 m / sec; And Coating the surface of the MDF with a hot melt film; Method for producing a flame retardant plate using a functional and flame retardant inorganic coating composition comprising a.

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