KR20190100750A - Nonflammable Sheet and Method of Same - Google Patents

Abstract

The present invention relates to a non-flammable sheet capable of being used for providing non-flammability to a building surface constructed with various kinds of flammable building material, and a manufacturing method thereof. According to the present invention, the non-flammable sheet comprises a pair of glass fiber fabrics (10, 20) forming a surface layer and a non-flammable layer (30) including a silane compound and expanded graphite and integrally bonded between the glass fiber fabrics. The glass fiber fabric can be both of glass fiber non-woven fabric and plain-woven glass fiber fabric, and has a unit weight of 10 to 1,000 g/m^2 and the thickness of 0.01 to 1.0 mm. The non-flammable layer (30) is formed by coating or inserting a liquid composition including a silane composition (A), water or an aqueous thickener solution (B), and the expanded graphite (C) between the glass fiber fabrics (10, 20), and curing the liquid composition. The silane composition (A) is formed by mixing 0.3 to 3.0 parts by weight of acetic acid and a small amount of additives with 100 parts by weight of silane compound. The aqueous thickener solution (B) is formed by mixing 3 to 9 parts by weight of a thickener with 100 parts by weight of water. The expanded graphite (C) may desirably include 95% or more of a carbon component, and have a particle size of 60 to 300 mesh and a foaming ratio of 200 to 350 times at 250 to 400°C. The non-flammable layer (30) comprises 20 to 60 parts by weight of the water or the aqueous thickener solution (B) and 20 to 150 parts by weight of the expanded graphite (C) with respect to 100 parts by weight of the silane composition (A). A liquid composition forming the non-flammable layer (30) may additionally contain an aqueous hardener solution (D). The aqueous hardener solution (D) is formed by mixing a hardener and water by almost 1:1 to 2.

Description

Nonflammable sheet and its manufacturing method {Nonflammable Sheet and Method of Same}

The present invention relates to a nonflammable sheet for imparting incombustibility or flame retardancy by adhering to various combustible building materials such as wood, plywood, styrofoam, urethane foam, polyethylene expanded form, various insulation materials, and the like. The present invention also includes various non-combustible building materials in which the non-combustible sheet is bonded to the various combustible building materials. The present invention also includes a method for producing the non-combustible sheet.

Construction materials such as wood, plywood, styrofoam, urethane foam, expanded foam, and insulation have always been exposed to fire hazards, and efforts have been made to manufacture non-combustible products. Recently, in order to prepare for a large fire occurring in various buildings and apartments, various legal regulations have been implemented at the government level. In Korea, the Building Act, its Enforcement Decree, and the Enforcement Regulations require the use of non-combustible materials for building interior and exterior materials.

One method for imparting incombustibility or flame retardancy to combustible building materials is using water glass. Water glass has been researched to impart nonflammability or flame retardancy to combustible materials by mixing other inorganic materials such as silane compounds as inorganic materials.

Water glass is soluble silicates, a compound in which silica (SiO ₂ ) and alkali metal oxide (M ₂ O) are combined at various molar ratios. Water glass is one of the oldest and most familiar inorganic compounds, and is generally represented by the molecular formula of M ₂ O-nSiO ₂ -xH ₂ O because it contains water in its structure and is called 'water glass' because it is dissolved in water. Depending on the type of alkali metal (M), there are sodium silicate (sodium silicate), potassium silicate (garlic silicate), and lithium silicate. Sodium silicate is mixed with Na ₂ CO ₃ to the silica (SiO _2), and potassium silicate is a mixture of K ₂ CO ₃ in silica (SiO _2), it is prepared by melting the mixtures in 1,100~1,200 ℃. The glass thus made is dissolved in water under high temperature and high pressure to become a transparent and viscous liquid.

Water glass has various properties depending on the molar ratio of silica to alkali metals and the concentration of solution and is used for various purposes. In addition to the advantages of adhesion and bonding, dispersion, buffering, film formation, corrosion resistance, etc., water glass, which has environmental safety, strong and strong bonding strength, ease of use, heat resistance, and flame retardancy, is drawing attention as a unique material of value. .

In water glass, the silicate in aqueous solution creates a strong negative charge of SiO ₄ ^{4 −} , which is easily absorbed by the metal oxide surface. This surface adsorption effect is effective in preventing aggregation and dispersion, and is used in detergent industry, paper industry, ceramic industry, and the like. The removal of water from the silicate gradually becomes sticky and viscous and easily forms a film on the surface. However, this film has the drawback of being soluble in water again. In order to improve the water resistance of water glass, it is necessary to select a silicate having a high molar ratio, and to perform heat drying or chemical curing after coating.

Korean Patent No. 873652 discloses a flame retardant coating agent for flame retardant treatment of foamed styrofoam particles, wherein the flame retardant coating agent is (a) water glass, (b) anti-film peeling component, (c) smoke suppressing component, (d) ratio An oil component comprising silicone oil dispersed in a boiler oil, (e) a toxic gas inhibitory component, (f) a heat insulating material component, and (g) a silane adhesive component. This flame retardant coating agent contains an anti-film peeling component, so that the foamed styrofoam particles flame-retarded with the flame retardant coating agent do not peel off the film during molding, and the ignition is delayed, thereby preventing the expansion of combustion.

The present inventors have also prepared a functional coating composition containing water in a water glass, a silane compound, a boric acid compound, or a phosphoric acid compound, and filed it with a patent application No. 2009-128850. This functional coating composition has been shown to have excellent water resistance, fouling resistance and flame retardancy. The present inventors also developed a coating composition comprising water glass, borax, and water, and filed it with a patent application No. 2010-86514. This paint composition has been shown to be able to prevent scratching of the coating by imparting luster to the coating and improving surface hardness while having water resistance, stain resistance and flame retardancy.

Korean Patent Publication No. 2015-65726 discloses a) a molar ratio of SiO ₂ to M ₂ O of 3: 2 or more and 7: 1 or less, M is a water glass selected from alkali metals and / or quaternary ammonium compounds, and b) organic An alkaline composition composed of silanes is disclosed.

Water glass itself is nonflammable but cannot be used for nonflammability or flame retardancy because it is water soluble in water. For example, even if coated with water glass in order to impart non-combustibility to wood or plywood, the coating layer absorbs moisture in the air, melts and flows down. If the coating layer flows down, nonflammability cannot be expected. Therefore, there have been many attempts to impart nonflammability by mixing silane compounds in water glass. However, the mixture of the silane compound in the water glass overcomes the solubility in water to some extent, but has a drawback in that the whitening phenomenon occurs and the coating layer is peeled off.

In order to solve the above problems, the present inventors have developed a new method for forming a coating film on the surface of a building material to have a non-flammable and has been filed as a patent application No. 2017-117020. The method of the patent application consists of applying water glass to the surface of the material to form a water glass coating layer, drying the water glass coating layer, and applying a silane mixture solution on the dried water glass coating layer, The problem is following.

As a result of repeated studies, the inventors have previously used wood, plywood, styrofoam, urethane foam, PE foam, PE foam, various insulation materials, etc. to adhere to walls, floors, ceilings, etc. of buildings constructed with combustible building materials. It is to develop a non-combustible sheet of the present invention that can produce a non-combustible building material that can be attached to a combustible building material such as styrofoam, urethane foam, PE foam, various heat insulating materials and the like to impart non-combustibility.

An object of the present invention is a new non-combustible that can be used to attach to walls, floors, ceilings, etc. of buildings constructed with various combustible building materials such as wood, plywood, styrofoam, urethane foam, PE foam, various insulation materials, and the like. It is for providing a sheet.

Another object of the present invention is to provide a non-combustible sheet capable of producing a non-combustible building material that can be attached to various combustible building materials such as wood, plywood, styrofoam, urethane foam, PE foam, various insulation materials and the like to impart non-combustibility. will be.

Another object of the present invention is to provide a method for producing a non-combustible sheet.

The above and other objects of the present invention can be achieved by the present invention described in detail below.

The non-flammable sheet of the present invention that can be used to adhere to walls, floors, ceilings, etc. of buildings constructed of various combustible building materials such as wood, plywood, styrofoam, urethane foam, PE foam, and various insulation materials to impart nonflammability to the skin layer. A pair of glass fiber fabrics (10, 20) and a non-combustible layer (30) comprising a silane compound and expandable graphite (expandable graphite) between the glass fiber fabrics constituting the is characterized in that the integrally bonded.

The glass fiber fabric used may be both a glass fiber nonwoven fabric or a glass fiber fabric woven into plain weave, and may have a unit weight of 10 to 1,000 g / m ² and a thickness of 0.01 to 1.0 mm.

The non-combustible layer 30 is cured by applying or injecting a liquid composition comprising a silane composition (A), water (B), and expanded graphite (C) between a pair of glass fiber fabrics (10, 20) Form. The said silane composition (A) is manufactured by mixing 0.3-3.0 weight part of acetic acid and a small amount of additives with 100 weight part of silane compounds. As the silane compound, methyltrimethoxysilane (CH ₃ -Si- (OCH ₃ ) ₃ ) or tetraethoxysilane (Si- (OC ₂ H ₅ ) ₄ ) can be preferably used. As the additive, a dispersant, an antifoaming agent, a leveling agent, or the like, which is known as an additive of paint, may be used. Water (B) serves to uniformly mix the silane compound, acetic acid, and additives. The expanded graphite (C) has a carbon component of 95% or more, a particle size of 60 to 300 mesh, and a product having a foaming ratio of 200 to 350 times at 250 to 400 ° C. can be preferably used.

The liquid composition forming the non-combustible layer 30 preferably contains 20 to 60 parts by weight of water (B) and 20 to 150 parts by weight of expanded graphite (C) in 100 parts by weight of the silane composition (A).

The water (B) may further include a thickener. That is, the thickener aqueous solution (B) containing a thickener can be used instead of water (B). Thickener aqueous solution (B) contains 3-9 weight part of thickeners in 100 weight part of water. The thickener serves to uniformly mix the expanded graphite (C).

The liquid composition forming the non-combustible layer 30 may further contain a curing agent aqueous solution (D). The curing agent aqueous solution (D) is prepared by mixing the curing agent and water in approximately 1: 1 to 2. As the curing agent, aminoethylaminopropyltrimethoxysilane (H ₂ NC ₂ H ₄ HNC ₃ H ₆ -Si- (OCH ₃ ) ₃ ) which is an alkaline silane compound is preferably used. It is preferable to contain a hardening | curing agent aqueous solution (D) in 1-7 weight part of 100 weight part of silane compositions (A).

The non-combustible sheet 100 of the present invention, in which a pair of glass fiber fabrics 10 and 20 and a non-combustible layer 30 including a silane compound and expanded graphite are integrally bonded (cured) between the glass fiber fabrics, is made of glass. It is preferable that the thickness of the textile fabrics 10 and 20 is 0.01-1.0 mm, and the thickness of the nonflammable layer 30 is 0.1-2.0 mm.

The non-flammable sheet 100 of the present invention is a gap corresponding to the thickness of the non-flammable layer 30 through a pair of guide rolls 51 of a pair of glass fiber fabrics (10, 20) wound in a roll (roll) form Supplying a liquid composition comprising a silane compound and expanded graphite to form a non-flammable layer 30 between the pair of glass fiber fabrics 10 and 20 while maintaining a constant rate, and the pair of It is prepared by curing the non-flammable layer 30 formed between the glass fiber fabric (10, 20).

If the liquid composition does not contain the curing agent aqueous solution (D), the step of heating using the heater 54 to take time to cure should be further performed. The heating step is cured by passing for 5 to 15 minutes at a temperature of 50 ~ 150 ℃ in a chamber equipped with a heater (54). When the liquid composition contains the curing agent aqueous solution (D), it does not need a separate heating step because it is cured until it is wound while passing through the guide rolls 53 and 55.

The non-flammable sheet 100 of the present invention manufactured by integrally curing the non-flammable layer 30 between the pair of fiberglass fabrics 10 and 20 and the fiberglass fabric is made of wood, plywood, styrofoam, urethane foam, PE foam. Non-combustibility can be provided by adhering to walls, floors, ceilings, etc. of buildings constructed with various combustible building materials such as foams and various insulating materials. In addition, the non-combustible sheet 100 of the present invention may be bonded to various combustible building materials to produce various non-combustible building materials.

The non-combustible sheet 100 of the present invention may be configured by integrally bonding a non-combustible layer 30 including a silane compound and expanded graphite on one glass fiber fabric 20. In this case as well, the liquid composition forming the non-combustible layer 30 may be composed of a silane composition (A), water or a thickener aqueous solution (B), and expanded graphite (C), and further contains an aqueous curing agent solution (D). You may. As a method of applying the liquid composition on the glass fiber fabric 20, conventional coating methods such as spray, brush coating, and roller coating may be preferably used.

The non-combustible sheet 100 of the present invention, which is formed by integrally bonding the non-combustible layer 30 on one glass fiber fabric 20, is applied to the surface of a building constructed of various combustible building materials or attached to various combustible building materials. In the manufacture of non-combustible building materials, the non-combustible layer 30 must be constructed to bond with the building material surface.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

The present invention is used to attach to the wall, floor, ceiling, etc. of a building constructed of various combustible building materials such as wood, plywood, styrofoam, urethane foam, PE foam, various insulation materials, or the like to impart non-combustibility or the various combustible constructions. The present invention has the effect of providing a new non-combustible sheet and a method of producing the non-combustible sheet capable of producing a non-combustible building material that can be attached to a material to impart non-combustibility.

1 is a cross-sectional view showing a schematic cross section of a non-combustible sheet 100 according to one embodiment of the invention.
FIG. 2 is a diagram schematically illustrating a process of manufacturing the non-combustible sheet 100 of FIG. 1.
3 is a cross-sectional view showing a schematic cross section of a non-combustible sheet 100 according to another embodiment of the present invention.

The present invention bonds the non-flammable sheet to a nonflammable sheet and various combustible building materials for imparting incombustibility or flame retardancy by adhering to various combustible building materials such as wood, plywood, styrofoam, urethane foam, PE foam foam, insulation, and the like. It is about a non-combustible building material.

The non-flammable sheet of the present invention which can be used to attach to walls, floors, ceilings, and the like of a building constructed of various combustible building materials to impart non-combustibility has a pair of glass fiber fabrics 10 and 20 constituting the skin layer and the glass. The non-flammable layer 30 including the silane compound and the expanded graphite is integrally bonded between the fiber fabrics.

1 is a cross-sectional view showing a schematic cross section of a non-combustible sheet 100 according to one embodiment of the invention. The glass fiber fabrics 10 and 20 may be both glass fiber nonwoven fabrics and glass fiber fabrics made of plain weave, and those having a unit weight of 10 to 1,000 g / m ² and a thickness of 0.1 to 1.0 mm may be preferably used. have.

The non-combustible layer 30 is formed by applying or injecting a liquid composition comprising a silane composition (A), water (B), and expanded graphite (C) between a pair of glass fiber fabrics 10 and 20 to cure it. do.

The said silane composition (A) is manufactured by mixing 0.3-3.0 weight part of acetic acid and a small amount of additives with 100 weight part of silane compounds. As the silane compound, methyltrimethoxysilane (CH ₃ -Si- (OCH ₃ ) ₃ ) or tetraethoxysilane (Si- (OC ₂ H ₅ ) ₄ ) can be preferably used. As the additive, a dispersant, an antifoaming agent, a leveling agent, or the like, which is known as an additive of paint, may be used.

Water (B) serves to uniformly mix the silane compound, acetic acid, and additives. The expanded graphite (C) has a carbon component of 95% or more, a particle size of 60 to 300 mesh, and a product having a foaming ratio of 200 to 350 times at 250 to 400 ° C. can be preferably used.

The liquid composition forming the non-combustible layer 30 preferably contains 20 to 60 parts by weight of water (B) and 20 to 150 parts by weight of expanded graphite (C) in 100 parts by weight of the silane composition (A). When the expanded graphite (C) is included in an amount of 20 parts by weight or less per 100 parts by weight of the silane composition (A), sufficient foamed graphite layer is not formed in a fire, and thus heat and flame cannot be sufficiently blocked. On the other hand, when the expanded graphite (C) is included in an amount of 150 parts by weight or more per 100 parts by weight of the silane composition (A), the use of expanded graphite is unnecessarily large, thereby increasing the manufacturing cost.

The water (B) may further include a thickener. That is, the thickener aqueous solution (B) containing a thickener can be used instead of water (B). Thickener aqueous solution (B) contains 3-9 weight part of thickeners in 100 weight part of water. The thickener serves to uniformly mix the expanded graphite (C).

The liquid composition forming the non-combustible layer 30 may further contain a curing agent aqueous solution (D). The curing agent aqueous solution (D) is prepared by mixing the curing agent and water in approximately 1: 1 to 2. As the curing agent, aminoethylaminopropyltrimethoxysilane (H ₂ NC ₂ H ₄ HNC ₃ H ₆ -Si- (OCH ₃ ) ₃ ) which is an alkaline silane compound is preferably used. It is preferable to contain a hardening | curing agent aqueous solution (D) in 1-7 weight part of 100 weight part of silane compositions (A).

The non-combustible sheet 100 of the present invention, in which a pair of glass fiber fabrics 10 and 20 and a non-combustible layer 30 including a silane compound and expanded graphite are integrally bonded (cured) between the glass fiber fabrics, is made of glass. It is preferable that the thickness of the textile fabrics 10 and 20 is 0.01-1.0 mm, and the thickness of the nonflammable layer 30 is 0.1-2.0 mm.

FIG. 2 is a diagram schematically illustrating a process of manufacturing the non-combustible sheet 100 of FIG. 1. The pair of fiberglass fabrics 10 and 20 wound in a roll form is supplied at a constant speed while maintaining a gap corresponding to the thickness of the nonflammable layer 30 through the pair of guide rolls 51. At the same time to supply a liquid composition comprising a silane compound and expanded graphite to form a non-combustible layer 30 between the pair of glass fiber fabrics (10, 20). The liquid composition is stored in the hopper 56 and fed at a constant rate. All the above methods can be easily carried out by those skilled in the art having ordinary skill in the art.

The nonflammable sheet 100 of the present invention is produced by curing the nonflammable layer 30 formed between the pair of glass fiber fabrics 10, 20. The non-combustible sheet 100 is wound in the form of a roll through a heating chamber (not shown) and the like provided with a plurality of guide rolls 53 and 55 and, if necessary, a heater 54. When the liquid composition does not contain an aqueous solution of a curing agent (D) and is composed of a silane composition (A), water or a thickening solution (B), and expanded graphite (C), it takes time to cure using a heater 54. The heating step must be further carried out. The heating step is cured by passing for 5 to 15 minutes at a temperature of 50 ~ 150 ℃ in a chamber equipped with a heater (54). When the liquid composition contains the curing agent aqueous solution (D), it does not need a separate heating step because it hardens sufficiently until it is wound while passing through the guide rolls 53 and 55. All the above methods can be easily carried out by those skilled in the art having ordinary skill in the art.

The non-flammable sheet 100 of the present invention manufactured by integrally curing the non-flammable layer 30 between the pair of fiberglass fabrics 10 and 20 and the fiberglass fabric is made of wood, plywood, styrofoam, urethane foam, PE foam. Non-combustibility can be provided by adhering to walls, floors, ceilings, etc. of buildings constructed with various combustible building materials such as foams and various insulating materials. In addition, the non-combustible sheet 100 of the present invention may be bonded to various combustible building materials to produce various non-combustible building materials.

The non-combustible sheet 100 of the present invention may be configured by integrally bonding a non-combustible layer 30 including a silane compound and expanded graphite on one glass fiber fabric 20. 3 is a sectional view showing a schematic cross section of a non-combustible sheet 100 according to this embodiment of the invention. In this case as well, the liquid composition forming the non-combustible layer 30 may be composed of a silane composition (A), water or a thickener aqueous solution (B), and expanded graphite (C), and further contains an aqueous curing agent solution (D). You may. As a method of applying the liquid composition on the glass fiber fabric 20, conventional coating methods such as spray, brush coating, and roller coating may be preferably used.

The non-combustible sheet 100 of the present invention, which is formed by integrally bonding the non-combustible layer 30 on one glass fiber fabric 20, is applied to the surface of a building constructed of various combustible building materials or attached to various combustible building materials. In the manufacture of non-combustible building materials, the non-combustible layer 30 must be constructed to bond with the building material surface.

The non-flammable sheet 100 of FIG. 1 produced by curing the non-flammable layer 30 formed between the pair of glass fiber fabrics 10 and 20 is placed on a torch in a torch, as in a real fire situation. Even if it burns by contacting for 30 minutes, a flame (flame) does not adhere to a nonflammable sheet, and it does not burn. That is, when the torch comes into contact with the glass fiber fabric 10 or 20, which is one side of the non-combustible sheet, the glass fiber fabric does not burn because the combustion temperature reaches approximately 1,000 占 폚. The non-combustible layer 30 contains expanded graphite. When the non-combustible layer 30 is in contact with the torch, the expanded graphite is foamed and its portion is swollen. Since expanded graphite has a foaming ratio of 250 to 350 times, when the torch contacts, it expands to block heat. As a result, the heat in contact with the noncombustible layer is no longer transferred to the building material on the other side. Therefore, the non-flammable sheet 100 of FIG. 1 manufactured by curing the non-flammable layer 30 formed between the pair of glass fiber fabrics 10 and 20 completely blocks heat during a fire, and does not generate a flame. It becomes nonflammable.

In the non-flammable sheet 100 of the present invention in which the non-flammable layer 30 is formed on one glass fiber fabric 20, the non-flammable layer 30 is in contact with the surface of the building material, and the fiberglass fabric 20 is moved to the outside. Exposed. The flame is applied to the glass fiber fabric 20 exposed at the time of fire, even in this case, the non-combustible layer 30 is expanded expanded graphite contained therein is swelled. The swollen graphite expands to block heat. As a result, the heat in contact with the noncombustible layer is no longer transferred to the building material on the other side. In other words, the glass fiber fabric supports the expanded graphite without dispersing the expanded graphite, and at the same time, the expanded expanded graphite blocks heat and flame, thereby completely preventing the combustion of the combustible building material inside. Therefore, the non-flammable sheet 100 of FIG. 3 of the present invention in which the non-flammable layer 30 is formed on one glass fiber fabric 20 also completely blocks heat during a fire and does not generate flame, resulting in non-combustibility.

The present invention will be embodied by the following examples, which are described for illustrative purposes only and should not be construed as limiting or limiting the scope of the invention.

Example : Nonflammable Sheet  Produce

A glass fiber nonwoven fabric having a unit weight of 150 g / m ² and a thickness of 0.15 mm was used as a glass fiber fabric for producing a nonflammable sheet.

In order to manufacture the liquid composition for forming the non-combustible layer 30, the silane composition (A), the thickener aqueous solution (B), and expanded graphite (C) were prepared. The silane composition (A) was prepared by mixing 0.1 parts by weight of 1.0 part by weight of acetic acid and 100 parts by weight of a dispersant and an antifoaming agent as additives. As the silane compound, methyltrimethoxysilane (CH ₃ -Si- (OCH ₃ ) ₃ ), which is a XIAMETER® OFS-6070 silane, was used. Thickener aqueous solution (B) was prepared by mixing 4 weight part of thickeners with 100 weight part of water. Expanded graphite (C) was used in the carbon component is 95% or more, the particle size of 80 mesh, having a 300 times the expansion ratio at 300 ℃.

40 parts by weight of the aqueous thickener solution (B) and 70 parts by weight of the expanded graphite (C) were mixed with 100 parts by weight of the silane composition (A) to prepare a liquid composition for forming the non-combustible layer 30.

The liquid composition was coated on the glass fiber nonwoven fabric with a roller coating to form a non-flammable layer 30 having a thickness of 0.2 mm, and the glass fiber nonwoven fabric was bonded on the non-flammable layer and cured at room temperature for 6 hours or more.

The non-combustible sheet prepared above was bonded to a 12 mm thick OSB (Oriented Strand Board) to make three samples (A, B, C) having a horizontal X length of 100 X 100 mm and two samples having a horizontal X length of 220 X 220 mm (D , E) was prepared. Samples A, B, and C were subjected to a heat release rate test, and samples D and E were gas-hazardous tests. The test was conducted by the Korea Fire Insurance Association's Disaster Prevention Testing Institute (Test Report No .: GK2018-0011). Test measurement methods and results are as follows.

Heat release rate test : Samples A, B, and C were subjected to a heat release rate test according to KS F ISO 5660-1: 2008, and the results are shown in Table 1 below.

Gas Hazard Test : Samples D and E were tested for heat release rate according to KS F 2271: 2016 and the results are shown in Table 2 below.

When the non-combustible sheet of the present invention is bonded to OSB, which is a representative combustible building material, as shown in the results of the above heat release rate test and gaseous hazard test, the OSB does not burn because the non-combustible sheet completely blocks the flame and blocks the heat. Therefore, it can be seen that no harmful gas is generated.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (20)

A pair of fiberglass fabrics 10 and 20 constituting the skin layer; And
A non-combustible layer 30 comprising a silane compound and expandable graphite between the glass fiber fabrics;
And a pair of glass fiber fabrics (10, 20) and a nonflammable layer (30) integrally bonded to each other.
The non-combustible sheet according to claim 1, wherein the glass fiber fabric is a glass fiber nonwoven fabric or a plain fiber woven fabric, and has a unit weight of 10 to 1,000 g / m ² and a thickness of 0.01 to 1.0 mm.
The method of claim 1 or 2, wherein the non-combustible layer 30 is a pair of glass fiber fabric 10, a liquid composition comprising a silane composition (A), water (B), and expanded graphite (C) 20) A non-combustible sheet characterized in that it is formed by applying or curing in between.
The non-combustible sheet according to claim 3, wherein the non-combustible layer 30 comprises 20 to 60 parts by weight of water (B) and 20 to 150 parts by weight of expanded graphite (C) in 100 parts by weight of the silane composition (A). .
The non-combustible sheet according to claim 4, wherein the silane composition (A) is prepared by mixing 0.3 to 3.0 parts by weight of acetic acid and a small amount of an additive to 100 parts by weight of a silane compound.
The non-combustible sheet according to claim 4, wherein the expanded graphite (C) has a carbon content of 95% or more, a particle size of 60 to 300 mesh, and a expansion ratio of 200 to 350 times at 250 to 400 ° C. .
The method of claim 5, wherein the silane compound is methyltrimethoxysilane (CH ₃ -Si- (OCH ₃ ) ₃ ) or tetraethoxysilane (Si- (OC ₂ H ₅ ) ₄ ), The additive is a dispersant, Nonflammable sheet, characterized in that the antifoaming agent, leveling agent, or a combination of two or more thereof.
The non-combustible sheet according to claim 3, wherein the water (B) is a thickener mixture comprising 3 to 9 parts by weight of thickener per 100 parts by weight of water.
4. The non-combustible sheet according to claim 3, wherein the non-combustible layer (30) further comprises a curing agent aqueous solution (D) prepared by mixing the curing agent and water in approximately 1: 1 to 2.
The non-combustible sheet according to claim 9, wherein the curing agent is an aminoethylaminopropyltrimethoxysilane (H ₂ NC ₂ H ₄ HNC ₃ H ₆ -Si- (OCH ₃ ) ₃ ) which is an alkaline silane compound.
The non-flammable sheet according to claim 9, wherein the aqueous solution of the curing agent (D) is contained in 1 to 7 parts by weight in 100 parts by weight of the silane composition (A).
12. The non-flammable sheet 100 according to any one of claims 1 to 11, wherein the thickness of the glass fiber fabrics 10 and 20 is 0.01 to 1.0 mm, and the thickness of the non-flammable layer 30 is 0.1 to 2.0 mm. Non-flammable sheet characterized by the above-mentioned.
Non-combustible sheet, characterized in that one glass fiber fabric 20, and a non-combustible layer (30) comprising a silane compound and expandable graphite (30) is integrally bonded on the glass fiber fabric.
The non-combustible sheet according to claim 13, wherein the glass fiber fabric is a glass fiber nonwoven fabric or a plain fiber woven fabric, and has a unit weight of 10 to 1,000 g / m ² and a thickness of 0.01 to 1.0 mm.
The method of claim 13 or 14, wherein the non-combustible layer 30 is formed of a liquid composition comprising a silane composition (A), water or a thickener aqueous solution (B), and expanded graphite (C) Non-combustible sheet.
16. The non-combustible sheet according to claim 15, wherein the non-combustible layer (30) further comprises a curing agent aqueous solution (D) prepared by mixing the curing agent and water in approximately 1: 1 to 2.
Supplying a pair of fiberglass fabrics 10 and 20 wound in a roll form at a constant speed while maintaining a distance corresponding to the thickness of the nonflammable layer 30 through the pair of guide rolls 51;
Supplying a liquid composition comprising a silane compound and expandable graphite to form a non-combustible layer 30 between the pair of glass fiber fabrics 10 and 20; And
Curing the nonflammable layer (30) formed between the pair of glass fiber fabrics (10, 20);
Method of producing a non-combustible sheet comprising the step.
18. The heater 54 according to claim 17, wherein when the liquid composition does not contain an aqueous solution of a curing agent (D) and is composed of a silane composition (A), an aqueous solution of water or a thickener (B), and expanded graphite (C), a heater 54 is used. Method for producing a non-combustible sheet characterized in that it further comprises the step of heating.
19. The method of manufacturing a non-combustible sheet according to claim 18, wherein the heating step is performed by passing through the chamber for 5 to 15 minutes at a temperature of 50 to 150 ° C. in a chamber equipped with a heater (54).
A non-combustible building material comprising the non-combustible sheet according to any one of claims 1 to 16 bonded to a combustible building material of wood, plywood, styrofoam, urethane foam, polyethylene expanded form, or insulation.

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