KR101866422B1 - Insulation and heating panel for fire safety - Google Patents

Abstract

The present invention relates to a heating panel including a first panel, a second panel opposite to the first panel, and a heat ray wired in a predetermined pattern between the first and second panels and heated by electric power supply. The first panel and the second panel include flame retardant plastic. According to the present invention, the heating panel can be fully protected against fire hazard, can be eco-friendly, and can reduce energy usage.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a heat-

FIELD OF THE INVENTION The present invention relates to a fire-resistant heat-generating panel, and more particularly, to an electric heating panel in which a heat ray is interposed between two panels, both panels including a flame-retardant plastic, To a heat generating panel.

Recently, electric heating devices such as electric brakes, electric plates, and electric heating panels are increasingly used to save heating costs and to facilitate heating in leisure activities such as camping.

Generally, such electrothermal heating devices are provided with a heater (hot wire) provided inside a mat, a panel, and a long plate, and a temperature control device for controlling the temperature of a mat, a panel, and a long plate by being connected to the heater through a physical connector .

However, such conventional heating devices are made of a combustible material such as a mat, so that there is always a risk of electric fire, and in fact, many fire accidents are occurring. Korean Patent Laid-Open No. 10-2009-0101428 (entitled "Fire Prevention Apparatus for Temperature Control Apparatus") discloses a safety apparatus based on a temperature overheating of a heater.

However, as disclosed in the above-mentioned document, the prior art discloses a method of preventing overheating and short-circuiting of heat inside the electrothermal heating device. However, the improvement of materials such as mats, panels, etc., Development is not proceeding.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a heat dissipation panel capable of eliminating the risk of electric fire by using semi-fire- .

Another object of the present invention is to provide a heat generating panel that is eco-friendly and can reduce energy usage by using alternative energy such as solar energy as a power source of a heat generating panel.

According to an aspect of the present invention, there is provided a plasma display panel comprising a first panel, a second panel, and a wiring between the first panel and the second panel, Wherein the first panel and the second panel each comprise flame retardant plastic independently.

Further, the heat-generating panel may further include a heat-insulating panel on the first panel in a direction opposite to the wiring with respect to the wiring, and the heat-insulating panel may include a flame-retardant organic insulating material.

The heating panel may further include a metal plate on the first panel and / or the second panel in a direction opposite to the wiring with respect to the wiring.

The heating panel may further include a patterned film on the first panel and / or the second panel in a direction opposite to the wiring with respect to the wiring.

Further, the heat generating panel can use the electric energy supplied from the solar cell.

The flame-retardant plastic may further include a thermoplastic resin pulverized to a size of 325 to 800 mesh, an inorganic metal hydroxide pulverized to a size of 800 to 5,000 mesh, and a crystalline metal hydroxide produced by reacting the inorganic metal hydroxide with a liquid basic material And a non-flammable siliceous material in the form of a cotton yarn.

In addition, the flame-retardant flakstick may be prepared by mixing 12 to 15% by weight of a thermoplastic resin pulverized into 325 to 800 mesh, 76 to 80% by weight of inorganic metal hydroxide pulverized into 800 to 5,000 mesh, 1 to 3% And a crystalline metal hydroxide produced by the reaction of the inorganic metal hydroxide, and the remaining non-combustible siliceous material in the form of a cotton yarn.

The flame-retardant flak stick may further contain 1 wt% of a lubricant composed of zinc stearate or EBS (ethylene bis stearamide).

The thermoplastic resin may be a tacky resin obtained by mixing 90 to 95% by weight of a polyethylene resin with 10 to 5% by weight of a hot-melt resin and then mixing the resin with a powder having a size of 325 to 800 mesh.

The inorganic metal hydroxide may be at least one selected from magnesium hydroxide and aluminum hydroxide.

Further, the basic material is an alkali solution that ionizes in a solution to generate a hydroxyl group (-OH), and may be any one or more selected from ammonium hydroxide, sodium hydroxide, and calcium hydroxide.

Further, the incombustible silicic material can be produced by firing natural minerals including silica sand (main component: SiO 2) and soda feldspar (Na 2 O · Al 2 O 3 · 6SiO 2).

The nonflammable siliceous material is obtained by firing natural minerals including silica sand (main component: SiO2) and soda feldspar (Na2O.Al2O3.6SiO2), and making them into a cotton form through a high-pressure sprayer, It can be made by grinding.

According to another aspect of the present invention, there is provided a method for producing the flame-retardant plastic, comprising the steps of: (a) injecting a thermoplastic resin pulverized into fine particles of 325 to 800 mesh size and an inorganic metal hydroxide pulverized into a size of 800 to 5,000 mesh into a reactor ; (b) adding a basic material to a mixture of a thermoplastic resin and an inorganic metal hydroxide in the reactor to synthesize a crystalline metal hydroxide; (c) a mixture of a thermoplastic resin drawn from the reactor, a mixture of an inorganic metal hydroxide and a crystalline metal hydroxide, and a nonflammable siliceous material in the form of a cotton yarn are fed into a kneader and copolymerized to form a kneaded flame retardant resin ; (d) extruding the flame retardant resin made in the kneader into a pellet form.

The thermoplastic resin to be mixed in the step (a) may be a powdery adhesive resin obtained by mixing 90 to 95% by weight of a polyethylene resin with 10 to 5% by weight of a hot melt resin and then pulverizing the mixture into fine particles having a size of 325 to 800 mesh .

Also, in the step (b), the temperature in the reactor may be maintained at 20 to 60 ° C.

In the step (b), spraying and drying of the basic material may be performed one to five times in total by spraying and drying the basic material.

Also, during the step (c), spraying and drying of the basic material in the kneader may be performed once, and the spraying and drying processes may be performed one to three times in total.

The non-combustible siliceous material to be introduced in step (c) is fired natural minerals containing silica sand (main component: SiO 2) and soda feldspar (Na 2 O · Al 2 O 3 · 6SiO 2) To 1 mm in length.

Further, the flame-retardant organic insulating material is a flame-retardant organic insulating material which is a foam of a resol-type phenol resin prepared by foaming and curing a resol-type phenol resin composition containing at least one selected from a resole type phenol resin, expanded graphite and flame retardant, .

The resol type phenol resin may be in a liquid state at room temperature.

The resol type phenolic resin may have a viscosity of 1,000 to 80,000 cps at room temperature.

Also, at least one selected from the expanded graphite and the flame retardant may be expanded graphite.

In addition, at least one selected from the expanded graphite and the flame retardant may be a flame retardant.

Further, at least one selected from the expanded graphite and the flame retardant may be expanded graphite and a flame retardant.

The flame retardant may be at least one selected from the group consisting of aluminum hydroxide, perlite, magnesium hydroxide, monoammonium phosphate, ammonium polyphosphate, red phosphorus, triaryl phosphate, tricresyl phosphate, And may be at least one selected from the group consisting of phosphoric acid, phosphoric acid, phosphoric acid, phosphoric acid, phosphate, triethyl phosphate, triphenyl phosphate, dimethyl methylphosphate, and haloalkyl phosphate.

The flame retardant is preferably a phosphorus flame retardant and the phosphorus flame retardant is selected from the group consisting of Mono Ammonium Phosphate, Ammonium Poly Phosphate, Red Phosphorus, Triaryl Phosphate, At least one selected from Tricresyl Phosphate, Triethyl Phosphate, Triphenyl Phosphate, Dimethyl Methylphosphate, and Halo Alkyl Phosphate.

N-butane, iso-pentane, neopentane, cyclopentane, n-butane, isobutyl chloride, pentyl chloride, propane, -Hexane, isohexane, heptane, cyclopropane, cyclobutane, cyclohexane, cycloheptane, isopropyl ether, methyl chloride, ethyl chloride, methylene chloride, dichlorofluoromethane, dichlorodifluoromethane, chlorodifluoromethane And dichlorotetrafluoroethane, trichloromonofluoromethane, and trichlorotrifluoroethane. In the present invention,

The foaming agent may be at least one selected from n-pentane, iso-pentane and heptane.

The foam stabilizer may be at least one selected from polysiloxane, polyoxyethylene sorbitan fatty acid ester, castor oil ethylene oxide adduct, dimethyl silicone oil, and silicone polyether copolymer.

The acid curing agent may be at least one selected from sulfuric acid, phosphoric acid, benzenesulfonic acid, ethylbenzenesulfonic acid, para toluenesulfonic acid, xylenesulfonic acid, naphtholsulfonic acid, and phenolsulfonic acid.

Further, the resol type phenol resin composition comprises 100 parts by weight of a resol type phenol resin; 1 to 60 parts by weight of at least one selected from expanded graphite and flame retardant; 1 to 20 parts by weight of a foaming agent; 1 to 20 parts by weight of a foaming agent; And 1 to 30 parts by weight of an acid curing agent.

According to another aspect of the present invention, there is provided a flame retardant organic insulating material which is a resorcinol phenol resin foam prepared by foaming and curing the phenolic resin composition.

According to another aspect of the present invention, there is provided a method for preparing a liquid resin composition, comprising the steps of: preparing a liquid material comprising a resol-type phenolic resin; Mixing the liquid material and a flame retardant to prepare a first mixture; Mixing the first mixture and expanded graphite to produce a second mixture; Mixing the second mixture and the foaming agent to prepare a third mixture; And mixing the third mixture and the acid curing agent to prepare a resol-type phenol resin composition.

In addition, the step of preparing the liquid material may be a step of preparing a liquid material including a resol-type phenol resin and a foam stabilizer.

And dissolving formaldehyde and phenol in water and reacting the resol-type phenol resin to prepare trimethylol phenol; And condensing the trimethylol phenol to produce a resol-type phenol resin.

In addition, in the step of preparing trimethylol phenol, barium hydroxide as a catalyst can be added to water.

According to another aspect of the present invention, there is provided a process for producing a flame retardant organic insulating material, which is a resorcinol phenol resin foam, which comprises foaming and curing the resolved phenolic resin composition to prepare a flame retardant organic insulating material which is a resorcinol phenol resin foam .

The present invention also provides a method for producing a flame retardant organic insulating material, which is a foam of the resol-type phenolic resin, comprising the steps of: preparing a liquid material containing a resol-type phenolic resin; Mixing the liquid material and a flame retardant to prepare a first mixture; Mixing the first mixture and expanded graphite to produce a second mixture; Mixing the second mixture and the foaming agent to prepare a third mixture; Mixing the third mixture with an acid curing agent to prepare a resol type phenolic resin composition; And foaming and curing the resol-type phenol resin composition to produce a flame-retardant organic insulating material that is a resolved phenolic resin foam.

Since the heat-generating panel according to the present invention having the above-described structure uses an environmentally friendly inorganic metal hydroxide having improved flame retardancy by utilizing a basic substance, fire is prevented and toxic gas is not generated in a fire, It is possible to provide a heat-generating panel suitable for flame-retardant or semi-flammable criteria by -744 (flame retardancy performance of building finishing materials and fire prevention structure standard).

In addition, the heat generating panel according to the present invention is eco-friendly by using alternate energy such as solar energy as a power source, and can reduce energy usage.

These drawings are for the purpose of describing an exemplary embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a schematic cross-sectional view of a part of a heat generating panel according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a part of a heat generating panel according to another embodiment of the present invention.
3 is a schematic cross-sectional view of a part of a heat generating panel according to another embodiment of the present invention.
4 is a graph showing the test results of the cone calorimeter and the gas harmfulness for evaluating the flame retardancy of the flame retardant plastic according to the present invention.
5 is a view showing the heat release rate of the flame-retardant organic insulating material.
6 is a view showing the shape of a sample after the flame-retardant test of the flame-retardant organic insulating material.
7A to 7D are graphs showing results of test of cone calorimeter and gas harmfulness for evaluating flame retardant performance of flame-retardant organic insulating material.
8 is a photograph of a heat generating panel manufactured according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood in advance that the drawings are only for the purpose of describing the preferred embodiments of the present invention and technical ideas or features in detail and clearly, and may differ from actual product specifications.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

In the following detailed description, the names of the components are denoted by the first, second, and so on in order to distinguish them from each other in terms of the same names, and are not necessarily limited to those in the following description.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", "unit of means "," part of item ", "absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

In addition, the flame retardant plastic described in the specification means a plastic having fire retardancy or non-combustibility as well as plastic corresponding to flame retardant material, semi-fire-retardant material or fire-retardant material grade according to Notification 2015-744 of the Ministry of Land, do.

In addition, the flame-retardant organic insulating material described in the specification is not only an organic insulating material corresponding to flame retardant material, semi-fire-retardant material or fire-retardant material grade according to Notification 2015-744 of the Ministry of Land, Transport and Tourism, but also fire retardancy or non-combustibility Means insulation.

1 is a schematic cross-sectional view of a part of a heat generating panel according to an embodiment of the present invention. Referring to FIG. 1, a heating panel 100 according to the present invention includes a first panel 10 and a second panel 20 facing the first panel 10, and a second panel 20 disposed between the first panel 10 and the second panel 20. And a heat ray 30 which is wired in a pattern and is heated by electric power supply. The heat generating panel 100 according to the present invention is characterized in that the first panel 10 and the second panel 20 include flame retardant plastics.

In the heat generating panel 100 according to the present invention, the hot wire 30 can use a known hot wire for generating heat by the flow of electricity without limitation, A detailed description thereof will be omitted.

Hereinafter, the flame retardant plastic, which is a feature of the present invention, will be described in more detail.

The flame-retardant plastic may include a thermoplastic resin pulverized to a size of 325 to 800 mesh, an inorganic metal hydroxide pulverized to a size of 800 to 5,000 mesh, a crystalline metal hydroxide produced by reacting a basic material of a liquid phase with the inorganic metal hydroxide, Of a flame-retardant siliceous material. At this time, an additional lubricant may be included.

More specifically, the flame retardant plastic of the present invention comprises 12 to 15% by weight of a thermoplastic resin pulverized into a 325 to 800 mesh size, 76 to 80% by weight, 1 to 3% by weight of an inorganic metal hydroxide pulverized into a 800 to 5,000 mesh size, By weight of a basic metal hydroxide, 1% by weight of a lubricant, and the balance of a non-flammable siliceous material in the form of a cotton yarn. The lubricant may be optionally not added.

The thermoplastic resin is composed of a powdery adhesive resin obtained by mixing 90 to 95% by weight of a polyethylene resin with 5 to 10% by weight of a hot-melt resin and then pulverizing the mixture into fine particles having a size of 325 to 800 mesh. The hot-melt resin is prepared by using a thermoplastic resin such as ethylene-vinyl acetate (EVA), polyamide, polyester, or acrylic as a main material and is applied in a liquid form at high temperature. Is a hot melt type adhesive. The thermoplastic resin is mixed in an amount of 12 to 15% by weight based on the total composition of the flame-retardant plastic.

The inorganic metal hydroxide is mixed in an amount of 76 to 80% by weight based on the total composition of the flame-retardant plastic. The inorganic metal hydroxide may be any one of magnesium hydroxide and aluminum hydroxide. However, when magnesium hydroxide and aluminum hydroxide are mixed at a weight ratio of 90 to 98: 2 to 10, it is preferable that the magnesium hydroxide and aluminum hydroxide have excellent properties in terms of moldability and flame retardancy .

The crystalline metal hydroxide is produced by reacting the basic material and the inorganic metal hydroxide. Preferably, the basic material is mixed in an amount of 1 to 3% by weight with respect to the total composition of the flame-retardant plastic during the production of the flame-retardant plastic. The basic material is an alkali solution that ionizes in a solution to generate a hydroxyl group (-OH), and may be any one or two or more of ammonium hydroxide, sodium hydroxide, and calcium hydroxide. Thus, the basic material increases the content of the hydroxyl group (-OH) of the inorganic metal hydroxide whose surface area is increased, thereby maximizing the flame retarding effect.

The lubricant may be Zinc Stearate, EBS (Hi-LUBE is high melting point wax synthesized from stearic acid, and chemical name is N, N'-ethyiene bis-stearamide, referred to as EBS (ethylene bis stearamide)). It is preferable that the lubricant is mixed in an amount of about 1% by weight based on the total composition of the flame-retardant plastic in the course of producing the flame-retardant plastic.

The nonflammable siliceous material is a component which acts to further increase the incombustibility. Silica (main ingredient: SiO ₂ ), which has excellent fire-retardant performance, and soda feldspar (Na ₂ O.Al ₂ O ₃ .6SiO ₂ ) is sintered and formed into a cotton form through a high-pressure injector, and is then pulverized into a cotton yarn having a length of 0.3 to 1 mm.

The flame retardant plastic of the present invention provides an effect of securing the inherent moldability and strength of the plastic while exerting a large amount of hydroxyl groups (-OH) upon combustion and exhibiting excellent flame retardant performance.

The flame retardant plastic according to the present invention, as described above,

(S1) adding a thermoplastic resin pulverized into fine particles having a size of 325 to 800 mesh and an inorganic metal hydroxide pulverized to a size of 800 to 5,000 mesh into a reactor and mixing them;

(S2) adding a basic material to a mixture of a thermoplastic resin and an inorganic metal hydroxide in the reactor to synthesize a crystalline metal hydroxide;

(S3) A mixture of a thermoplastic resin drawn from the reactor, a mixture of an inorganic metal hydroxide and a crystalline metal hydroxide, and a nonflammable siliceous material in the form of a cotton yarn are put into a kneader and copolymerized to form a kneaded flame retardant resin ; And

(S4) a step of extruding the flame-retardant resin made in the kneader in the form of a pellet.

In the step (S1), the thermoplastic resin may be a powdery adhesive resin obtained by mixing 90 to 95% by weight of a polyethylene resin and 5 to 10% by weight of a hot-melt resin, and pulverizing the mixture into fine particles having a size of 325 to 800 mesh .

In step (S2), the basic metal hydroxide is sprayed and dried in the reactor while the temperature of the reactor is maintained in the range of 20 ° C to 60 ° C, and the crystalline metal hydroxide is synthesized repeatedly. In this step, it is preferable that the basic material is sprayed and dried one time, and the spraying and drying process is performed twice to five times in total.

The basic material is a liquid basic substance such as ammonium hydroxide which generates a hydroxyl group (-OH). The basic material reacts with an inorganic metal hydroxide having an increased surface area to synthesize a crystalline metal hydroxide, -OH) to increase the flame retarding effect.

When the step of mixing the thermoplastic resin and the inorganic metal hydroxide with the liquid basic material is completed in the above step (S2), the mixture of the thermoplastic resin, the inorganic metal hydroxide and the crystalline metal hydroxide is taken out of the reactor, (kneader), and a flame-retardant resin is prepared by injecting a non-combustible siliceous material having a face shape of 0.3 to 1 mm in size into the kneader and stirring the mixture (Step S3).

In this way, during the mixing of the thermoplastic resin, the inorganic metal hydroxide, the crystalline metal hydroxide and the incombustible silicic material in the kneader, at least one basic material selected from ammonium hydroxide, sodium hydroxide and calcium hydroxide is sprayed into the kneader by spraying The drying process is performed once, and the spraying and drying process is performed one to three times in total.

When the crystalline metal hydroxide is synthesized again by adding a basic material in the kneader, it is possible to maintain the hydroxyl group (-OH) which can be lost in the process of stirring at a high temperature of 200 or more in the kneader .

The flame retardant resin kneaded in the kneader is extruded in the form of pellets as described above (step S4), and is then put into an extruder or a molding machine according to the application purpose of the extruder to form a final plastic product.

In the flame-retardant plastic of the present invention made by such a manufacturing method, a basic material for generating a hydroxyl group (-OH) is added to a thermoplastic resin and an inorganic metal hydroxide to synthesize a crystalline metal hydroxide to increase the flame retardancy, The following examples demonstrate that flame retardancy is maximized by the addition of non-combustible siliceous materials and that excellent moldability inherent in thermoplastic resins can be maintained.

The flame-retardant plastic raw material produced as described above can be processed into various forms. The heat generating panel 100 according to the present invention can be applied to various fire causes such as electric fires by applying the plate made of the flame retardant plastic material produced as described above to the first panel 10 and the second panel 20 It can be protected against various risks.

The outer surface of either the first panel 10 or the second panel 20 or the outer surface of either one of the first panel 10 and the second panel 20 may be surface-adhered or applied with a material such as a patterned film or loess.

2 is a schematic cross-sectional view of a part of a heat generating panel according to another embodiment of the present invention. Referring to FIG. 2, the heat generating panel 100 according to the embodiment includes a first panel 10 and a second panel 20 facing the first panel 10, and a second panel 20 disposed between the first panel 10 and the second panel 20 And a hot wire 30 which is wired in a predetermined pattern and is heated by electric power supply.

Further, a heat insulating panel 40 including a flame-retardant organic insulating material is additionally provided on the outer surface of the first panel 10 or the second panel 20. Although it is shown in the illustrated embodiment that the heat insulating panel 40 is provided on the outer surface of the first panel 10, the heat insulating panel 40 may be provided on the outer surface of the second panel 20 have.

Hereinafter, the flame-retardant organic insulating material constituting the heat insulating panel 40 will be described in more detail.

The heat generating panel 100 according to the present invention can protect the heat insulation from the risk of fire while maintaining the heat insulating property.

In the heat generating panel 100 according to an embodiment of the present invention, the flame-retardant organic thermal insulating material may include a resol-type phenol resin composition containing at least one selected from a resol-type phenol resin, expanded graphite and a flame retardant, And a flame-retardant organic insulating material which is a resolved phenolic resin foam prepared by foaming and curing.

The resol type phenol resin in the resol type phenol resin composition of the present invention is not particularly limited and may be appropriately selected from conventionally known liquid resol type phenol resins. For example, phenols and derivatives thereof such as phenol, cresol, xylenol, paraalkylphenol, paraphenylphenol, resorcin and the like and aldehydes represented by formaldehyde, paraformaldehyde, furfural, acetaldehyde, , An alkali catalyst represented by sodium hydroxide, potassium hydroxide, calcium hydroxide, and the like, and then subjected to a neutralization treatment and / or a reduced pressure dehydration treatment, if necessary, to prepare a liquid resol-type phenol resin.

The blending ratio of the phenol and the aldehyde is not particularly limited and is appropriately set in the range of 1.0: 1.1 to 4.0, particularly in the range of 1.0: 1.8 to 2.5, based on the molar ratio. The phenols, aldehydes and catalysts may be used alone or in combination of two or more.

In particular, the liquid resol-type phenol resin prepared may have a viscosity at a temperature of 25 and may be a liquid, specifically 1,000 to 80,000 cPs, preferably 3,000 to 50,000 cPs, more preferably 5,000 to 20,000 cPs, even more preferably It is between 5,500 and 7,500.

In the above-mentioned resol-type phenol resin composition, expanded graphite and a flame retardant may be used alone or in combination in order to enhance flame retardancy, and preferably used in parallel. The weight ratio (A: B) of the expanded graphite (A) and the flame retardant (B) may be 1: 0.01 to 1 part by weight based on 100 parts by weight of the resole type phenol resin when the expanded graphite and the flame- To 0.01 to 1.

The graphite may be natural graphite, artificial graphite or expanded graphite, and preferably expanded graphite may be used. When the expanded graphite is used singly, the blending amount is suitably selected in the range of usually 1 to 30 parts by weight, preferably 5 to 15 parts by weight, based on 100 parts by weight of the resol-type phenol resin.

The flame retardant is inorganic or organic and the flame retardant is selected from the group consisting of aluminum hydroxide, perlite, magnesium hydroxide, monoammonium phosphate, ammonium polyphosphate, red phosphorus, triaryl phosphate, Triethyl phosphate, triphenyl phosphate, dimethyl methylphosphate, or haloalkyl phosphate may be exemplified as the acid generator, Preferably, phosphoric acid-based flame retardants such as monoammonium phosphate, ammonium polyphosphate, red phosphorus, triaryl phosphate, tricresyl phosphate, triethyl phosphate, Triethylphosphate, triphenylphosphate, dimethyl methylphosphate, or haloalkylphosphate, or the like may be used. Examples are as follows. These may be used alone or in combination of two or more. When the above flame retardant is used alone, the blending amount is suitably selected in the range of usually 1 to 30 parts by weight, preferably 5 to 15 parts by weight, based on 100 parts by weight of the resol-type phenol resin.

Resin-type phenolic resin foam which is prevented from influx of oxygen (O2) by inflated flame retardant and explosive graphite which expands rapidly (200 to 250 times volume expansion) during fire and combustion and maintains high flame retardancy A flame-retardant organic insulation material can be obtained.

Examples of the foaming agent in the resol-type phenol resin composition include chlorinated aliphatic hydrocarbons such as dichloroethane, propyl chloride, isopropyl chloride, butyl chloride, isobutyl chloride, pentyl chloride and isopentyl chloride, propane, n-butane , iso-butane, n-pentane, iso-pentane, neo-pentane, cyclopentane, n-

Lower aliphatic hydrocarbons such as benzene, toluene, xylene, heptane, heptane, cyclopropane, cyclobutane, cyclohexane and cycloheptane; ether compounds such as isopropyl ether; Organic non-reactive foaming agents such as fluoromethane, chlorodifluoromethane and dichlorotetrafluoroethane, trichloromonofluoromethane, trichlorotrifluoroethane, and other alternative flon-based compounds, and the like. These foaming agents may be used alone or in combination of two or more. The non-reactive foaming agent referred to here means that the substance itself can volatilize under foaming conditions to foam the phenolic resin. Of these blowing agents, n-pentane, iso-pentane or heptane is preferably used or used in combination.

The blending amount of the blowing agent is appropriately selected in the range of usually 1 to 20 parts by weight, preferably 1 to 10 parts by weight, based on 100 parts by weight of the resol-type phenol resin. When the blending amount is less than 1 part by weight, foams having desired densities can not be obtained. Conversely, when the blending amount exceeds 10 parts by weight, bubbles are broken along with the increase of foaming pressure, and appearance and heat insulating performance (thermal conductivity) tend to deteriorate . In addition to the foaming agent, a gas such as nitrogen gas, oxygen gas, argon gas, or carbon dioxide gas, or a mixed gas thereof may be used.

The anti-foaming agent in the phenolic resin composition is not particularly limited, but a non-ionic surfactant is preferably used. If necessary, other ionic surfactants may be used alone or in combination. Examples of such nonionic surfactants include, for example, polysiloxanes, polyoxyethylene sorbitan fatty acid esters, castor oil ethylene oxide adducts, dimethyl silicone oil, and silicone polyether copolymers. These may be used alone or in combination of two or more. The blending amount of the foam stabilizer is suitably selected in the range of usually 1 to 10 parts by weight, preferably 3 to 7 parts by weight, based on 100 parts by weight of the resol-type phenol resin.

Examples of the acid curing agent in the resol-type phenol resin composition include inorganic acids such as sulfuric acid and phosphoric acid, and organic acids such as benzenesulfonic acid, ethylbenzenesulfonic acid, para toluenesulfonic acid, xylenesulfonic acid, naphtholsulfonic acid and phenolsulfonic acid But the present invention is not limited to these examples. These may be used alone or in combination of two or more. The blending amount of such an acid curing agent is suitably selected in the range of usually 1 to 50 parts by weight, preferably 5 to 10 parts by weight, based on 100 parts by weight of the resol-type phenol resin.

In the above-mentioned resol-type phenol resin composition, a plasticizer, an inorganic filler and the like may be contained as necessary.

In the above-mentioned resol-type phenolic resin composition, plasticizers that can be contained as needed are those having flexibility and imparting flexibility to the bubble wall of the obtained phenolic resin foam and suppressing deterioration of the heat insulating performance over time.

Such plasticizers include, for example, polyester polyols, polyether polyols, glycols, triphenyl phosphate, dimethyl terephthalate, dimethyl isophthalate, and the like. These may be used singly or in combination of two or more kinds.

In the present invention, the plasticizer is used in an amount of usually 0.1 to 20 parts by weight based on 100 parts by weight of the liquid resol-type phenol resin. When the amount of the plasticizer used is within the above range, the effect of imparting flexibility to the bubble wall can be excellently exerted without impairing the performance other than the obtained phenolic resin foam. The plasticizer is preferably used in an amount of 0.5 to 15 parts by weight, and more preferably 1 to 12 parts by weight.

In the above-mentioned resol-type phenol resin composition, an inorganic filler that can be contained as needed may be one which can effectively impart fire resistance and / or anticorrosion to the resulting phenolic resin foam.

Examples of such inorganic fillers include hydroxides and oxides of metals such as aluminum hydroxide, magnesium hydroxide, calcium oxide, magnesium oxide, aluminum oxide and zinc oxide, metal powders such as zinc, calcium carbonate, magnesium carbonate, And metal carbonates such as zinc. Among them, aluminum hydroxide and / or calcium carbonate are preferable. These may be used alone or in combination of two or more. The blending amount of the inorganic filler is appropriately selected in the range of usually 0.1 to 30 parts by weight, preferably 1 to 10 parts by weight, based on 100 parts by weight of the liquid resol-type phenol resin.

Hereinafter, a method for producing a flame-retardant organic insulating material which is a foam of a resol-type phenol resin will be described by foam-curing the above-mentioned resol-type phenol resin composition.

The flame retardant organic insulating material as the foam of the present invention is obtained by (a) preparing a liquid material containing a resol-type phenolic resin, (b) preparing a first mixture by mixing the liquid material and a flame retardant, (c) mixing the first mixture and the expanded graphite to prepare a second mixture, (d) mixing the second mixture and the foaming agent to prepare a third mixture, (e) To prepare a resol-type phenol resin composition; and (f) blowing-curing the resol-type phenol resin composition to prepare a flame-retardant organic insulating material which is a resol-type phenol resin foam.

Specific examples of the step (f) of foaming and curing the (f) resol-type phenol resin composition to produce a foam include (1) a molding method in which the foamable composition is foamed and cured on an endless conveyor belt, (2) (3) a method in which a foamable composition is filled in a mold and foamed and cured under pressure; (4) a method in which a foamed composition is filled in a large space and foamed and cured to form a foamed block; ) In addition to a method of filling and foaming while press fitting in a cavity, a method of foaming and curing the foamable composition by spraying the foamable composition on a concrete wall surface or the like with a field spray foaming machine.

Among them, according to the molding method of the above-mentioned (1) which has been conventionally employed in the field of construction materials, the phenolic resin foam is obtained by applying the foamable composition on a face material mounted on a conveyor belt for continuously moving, A different face material is placed on the composition to form a sandwich structure, which is guided into a heating and hardening furnace of a double conveyor belt type, and is foamed and cured in a furnace to form a predetermined thickness, .

The face member is not particularly limited and at least one member selected from a glass fiber nonwoven fabric, a spunbond nonwoven fabric, an aluminum foil nonwoven fabric, a metal plate, a metal foil, a plywood, a calcium silicate plate, a gypsum board and a woody cement board is preferable. The face plate may be formed on one side of the phenol resin foam or on both sides thereof. In the case of forming on both surfaces, the face materials may be the same or different. It may also be formed by adhering with an adhesive later.

The flame retardant organic insulating material 40 may be integrally laminated with the flame-retardant plastic panels 10 and 20 and may be applied in a module form or may be separately installed in the field according to the field conditions.

3 is a schematic cross-sectional view of a part of a heat generating panel according to another embodiment of the present invention. Referring to FIG. 3, the heat generating panel 100 according to the embodiment includes a first panel 10 and a second panel 20 facing the first panel 10, and a second panel 20 disposed between the first panel 10 and the second panel 20 And a hot wire 30 which is wired in a predetermined pattern and is heated by electric power supply.

Further, a metal plate 50 may be additionally provided on the outer surface or the outer surface of both the first panel 10 and the second panel 20. In the illustrated embodiment, the metal plate 50 is provided on the outer surfaces of both the first panel 10 and the second panel 20, but not limited thereto, May be provided.

Accordingly, the heat generating panel 100 according to the present embodiment can secure the design and strength of the metal material. The metal plate 50 may be made of steel or aluminum.

The heat generating panel 100 according to an embodiment of the present invention may use solar energy as a power source of the heat ray 30. [ Specific configurations for utilizing solar energy as a power source can be used without limitation in known configurations. The heat generating panel 100 according to the above embodiment is environmentally friendly by using solar energy, and has an effect of saving energy consumption.

Hereinafter, the present invention will be described in more detail with reference to examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[Example]

Production Example 1: Production of a heat-resistant panel using flame-retardant plastic

13 wt% of polyethylene resin of 325 mesh size, 1 wt% of hot melt resin using ethylene-vinyl acetate (EVA), 78 wt% of magnesium hydroxide of 2800 to 3500 mesh size and 2 wt% of aluminum hydroxide, 2 wt% , A lubricant of 1% by weight, and a nonflammable siliceous material of 3% by weight, a basic material was sprayed and dried five times in a reactor, sprayed twice in a kneader and dried to produce a flame retardant resin, Using the pellets, a flame retardant panel having a width of 910 mm, a length of 1630 mm, and a thickness of 8 mm was produced. As a result of the combustion test, it was confirmed that the excellent semi-incombustible performance satisfying the requirements of the Ministry of Land, Infrastructure and Transport No. 2015-744 was confirmed as described in the test report of FIG. Further, when the flame retardant plastic panel of the present invention was fabricated from a metal composite panel and applied to the surface material of a fire door, it was confirmed that the fire resistance test was excellent in that the surface of the fire door could be contacted by hand in the fire resistance test.

Manufacture of flame retardant organic insulation

Preparation of Resoluble Phenolic Resin

Resol - type phenol resin was prepared by two - stage condensation reaction of methylolphenol produced by one - step addition of phenol and formalin. Barium hydroxide is used as a reaction catalyst and the synthesis method is as follows.

Formalin (F) and phenol (P) were quantitatively measured and injected in a 100 L reactor at an F / P molar ratio of 1.2. The amount of formalin to phenol is added in excess. The initial temperature of the reaction was adjusted to 35 to dissolve solid phenol slowly. After the reaction raw materials were completely mixed, barium hydroxide as a catalyst was added and nitrogen gas was purged. The reaction temperature was gradually increased to a final reaction temperature of 90 ° C. The addition reaction was carried out for 3 hours to produce trimethylolphenol. The addition reaction was terminated and the resulting solution was cooled to room temperature and the water in the upper layer separated off.

A resol-type phenolic resin with a molecular weight of 550-750 g / mol and a viscosity of 5500-7000 cps was synthesized by condensation reaction of the product trimethylolphenol in a vacuum oven at a vacuum of 760 torr and a temperature of 120 ° C.

Example 1: Resol type phenol resin composition

Example  1-1

To 100 parts by weight of the resol-type phenol resin prepared above, 5 parts by weight of silicone-based foam was added and mixed. 10 parts by weight of aluminum hydroxide, which is a flame retardant, was added and mixed for 2 minutes. 10 parts by weight of expanded graphite of 80 mesh was charged and mixed for 1 minute. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example  1-2

To 100 parts by weight of the resol type phenol resin prepared in Preparation Example, 5 parts by weight of the silicon type foam stabilizer was added and mixed. 10 parts by weight of perlite, which is a flame retardant, was added and mixed for 2 minutes. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example  1-3

To 100 parts by weight of the resol type phenol resin prepared in Preparation Example, 5 parts by weight of the silicon type foam stabilizer was added and mixed. 10 parts by weight of ammonium phosphate polyphosphate (APP) as a phosphorus flame retardant was added and mixed for 2 minutes. 10 parts by weight of expanded graphite of 80 mesh was charged and mixed for 1 minute. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example  1-4

To 100 parts by weight of the resol type phenol resin prepared in Preparation Example, 5 parts by weight of the silicon type foam stabilizer was added and mixed. 10 parts by weight of ammonia polyphosphate (APP) as phosphorus flame retardant and 10 parts by weight of perlite were added and mixed for 2 minutes. 10 parts by weight of expanded graphite of 80 mesh was charged and mixed for 1 minute. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example  1-5

To 100 parts by weight of the resol type phenol resin prepared in Preparation Example, 5 parts by weight of the silicon type foam stabilizer was added and mixed. 20 parts by weight of ammonium polyphosphate (APP) as a phosphorus flame retardant was added and mixed for 2 minutes. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example  1-6

To 100 parts by weight of the resol type phenol resin prepared in Preparation Example, 5 parts by weight of the silicon type foam stabilizer was added and mixed. 10 parts by weight of magnesium hydroxide, which is a flame retardant, was added and mixed for 2 minutes. 10 parts by weight of expanded graphite of 80 mesh was charged and mixed for 1 minute. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example  1-7

To 100 parts by weight of the resol type phenol resin prepared in Preparation Example, 5 parts by weight of the silicon type foam stabilizer was added and mixed. 10 parts by weight of ammonium phosphate polyphosphate (APP) as a phosphorus flame retardant was added and mixed for 2 minutes. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example  1-8

To 100 parts by weight of the resol type phenol resin prepared in Preparation Example, 5 parts by weight of the silicon type foam stabilizer was added and mixed. 10 parts by weight of expanded graphite of 80 mesh was charged and mixed for 1 minute. 5 parts by weight of n-pentane as a foaming agent was added thereto and mixed for 2 minutes. Then, 8 parts by weight of para-toluenesulfonic acid (PTSA) as an acid curing agent was added thereto and mixed for 12 minutes to prepare a resol-type phenol resin composition.

Example Resol type phenol resin (parts by weight) Expanded graphite (parts by weight) Flame retardant (parts by weight) Foaming agent (parts by weight) Foaming agent (parts by weight) Acid hardening agent (parts by weight) Ammonium polyphosphate Hydroxide
aluminum Purite Magnesium hydroxide 1-1 100 10 - 10 - - 5 5 8 1-2 100 - - - 10 - 5 5 8 1-3 100 10 10 - - - 5 5 8 1-4 100 10 10 - 10 - 5 5 8 1-5 100 - 20 - - - 5 5 8 1-6 100 10 - - - 10 5 5 8 1-7 100 - 10 - - - 5 5 8 1-8 100 10 - - - - 5 5 8

Example  2: Resol type  Flame-retardant organic insulation material which is a phenolic resin foam

Example  2-1

The resol-type phenol resin composition of Example 1-1 was cured and foamed to prepare a flame-retardant organic insulating material which is a resole-type phenol resin foam.

Example  2-2

The resol-type phenol resin composition of Example 1-2 was cured and foamed at room temperature to prepare a flame retardant organic insulator which is a resorcinol phenol resin foam.

Example 2-3

The resol-type phenol resin composition of Example 1-3 was cured and foamed at room temperature to prepare a flame-retardant organic insulator as a resolved phenolic resin foam. The density was 66.8 kg / m < ^{3 &} gt ;.

Example  2-4

The resol-type phenol resin composition of Example 1-4 was cured and foamed at room temperature to prepare a flame-retardant organic insulating material which is a resorcinol phenol resin foam.

Example  2-5

The resol-type phenol resin composition of Example 1-5 was cured and foamed at room temperature to prepare a flame-retardant organic insulative material as a resolved phenolic resin foam.

Example  2-6

The resol-type phenol resin compositions of Examples 1-6 were cured and foamed at room temperature to prepare a flame-retardant organic insulating material that was a resorcinol phenol resin foam.

Examples 2-7

The resol-type phenol resin composition of Example 1-7 was cured and foamed at room temperature to prepare a flame retardant organic insulator which was a resorcinol phenol resin foam. The density was 67.6 kg / m ³ .

Examples 2-8

The resol-type phenol resin compositions of Examples 1-8 were cured and foamed at room temperature to prepare a flame retardant organic insulator as a foam of a resol-type phenolic resin. The density was 71.6 kg / m < ^{3 &} gt ;.

[Test Example]

The flame retardant performance was measured to evaluate whether it satisfied the grade of the fire-retardant material, semi-fire-retardant material or flame retardant material. According to Ministry of Land, Infrastructure and Transport notice 2015-744, quasi-incombustible materials and flame retardant materials should satisfy the following performance respectively. It can be classified into three grades of fireproof material, semi-fireproof material, and flame retardant material according to the combustion behavior of the material when heated corresponding to a normal fire.

Non-combustible material

The maximum temperature in the furnace for 20 minutes after the start of the heating test shall not rise above the final equilibrium temperature by more than 20 K, where the equilibrium is not reached for 20 minutes, Shall be the final equilibrium temperature and the rate of mass reduction shall not be more than 30%.

It should also be tested with KS F 2271 (gas toxicity test) and the average behavioral downtime of the experimental mice should be at least 9 minutes.

Semi-fireproof material

KS F ISO 5660-1 (cone calorie metric) to a test by more than 10 minutes total heat release 8MJ / m ² after the start of heating, the maximum heat repellent rate should not exceed 10 minutes for the 200KW / m ² to 10 seconds or more continuously, and , Cracks penetrating through the specimen after 10 minutes of heating, pitting and melting (including cores in the case of composite materials).

In addition, the average behavioral downtime of the experimental mice should not be less than 9 minutes as tested by KS F 2271 (Gas Hazard Test).

The ISO 5660-1 test method is based on the fact that the heat release rate during combustion is proportional to the amount of oxygen required for combustion of the material. That is, when 1 kg of oxygen is consumed during combustion, about 13.1 MJ of heat is emitted. During the prescribed external radiant heat, the specimen combusts in the ambient air condition, where the oxygen concentration and the exhaust gas flow rate are measured to calculate the heat release rate. In this way, the degree to which the material or product contributes to the rate of heat release during exposure to fire is assessed.

Flame retardant material

KS F ISO 5660-1 (cone calorie metric) to a test by more than five minutes total heat release 8MJ / m ² after the start of heating, the maximum heat release rate must not exceed 200KW / m ² to 10 seconds or more consecutive five minutes, and No cracks, holes and melting (including core material in the case of composite materials) penetrating the specimen after heating for 5 minutes.

In addition, the average behavioral downtime of the experimental mice should not be less than 9 minutes as tested by KS F 2271 (Gas Hazard Test).

Test Example  One: In cone calorimetry  Evaluation of flame retardant performance

According to KS F ISO 5660-1 (Cone Calorimetry), semi-burning performance and flame retardant performance were measured using a cone calorimeter. Table 2 summarizes the results of the flame retardancy performance according to the cone calorimeter method, and FIG. 5 shows the heat release rate (HRR).

Table 2 shows the result of cone calorimeter test according to the Ministry of Land, Infrastructure and Transport notification for the phenol foam formulations having various mixing ratios. The flame retardant performance was evaluated by cone calorimeter through various formulations including resol type phenol resin, expanded graphite, foaming agent, stabilizer, acid toughening agent, aminium hydroxide, perlite and magnesium hydroxide. .

Example Cone calorimeter method Flame Retardant Material (MJ / m ² ) Semi-incombustible material (MJ / m ² ) 2-1 2.0 3.9 2-2 12.7 22.8 2-3 1.7 4.5 2-4 12.6 19.9 2-5 8.7 15.1 2-6 1.1 3.4 2-7 3.6 8.9 2-8 8.4 14.0

Test Example 2: Measurement of sample shape after flame-retardant test

The shape of the sample after the flame-retardant test is shown in Fig. Example 2-3 was most favorable in shape after the flame retardancy test and had the best economical and flame retardancy.

Test Example 3: Gas Hazard Test

The gas hazard was measured according to the KS F 2271 test method.

Test Example 4

Evaluation of Flame Retardant Performance of Quasi-Flammable Materials Measured by the Chemical Test and Convergence Research Institute on the Flame Retardant Plastics Manufactured in accordance with Production Example 1 of the Present Invention and the Test Cases of the Flame Retardant Organic Thermal Insulation as a Resol Type Phenolic Resin Foam Produced According to Example 2-3 The test results of the cone calorimeter and the gas harmfulness are shown in Tables 3, 4 and 7A to 7D. Referring to Table 3, FIG. 4, and FIG. 7A to FIG. 7D, the flame retardant plastic of the present invention and the flame retardant organic insulating material as a resorcinol phenol resin foam were judged to be semi-flammable material conforming to the Ministry of Land, Transport and Transportation Notice No. 2015-744.

Psalter Cone calorimeter Gas hazard test Total calorific value
(MJ / m ² ) The time (sec) in which the heat release rate continuously exceeds 200 kW Changes in all melting, penetrating cracks and holes in the core Average Behavior Time
(Minutes: seconds) One 2.1 0 clear 11:50 2 2.9 0 clear 13:17 3 4.4 0 clear -

Insulating panel

The resolved phenolic resin composition of Example 2-2 was applied on a face material mounted on a conveyor belt for continuously moving the foamable composition and the other face material was placed on the foamed foamed composition to form a sandwich structure, This was introduced into a heating and curing furnace of a double conveyor belt type, foamed and cured in a furnace, and formed into a predetermined thickness. Then, a heat insulating panel having a width of 850 mm, a length of 1550 mm and a thickness of 25 mm was produced.

Production of heat panel

Referring to FIG. 8, the flame-retardant panels were placed on both sides, hot wires were interposed therebetween, and they were bonded with an adhesive. Then, the heat insulating panel was bonded to the outer surface of the flame retardant panel to produce a heat generating panel as shown in Fig.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Other embodiments may easily be suggested by adding, changing, deleting, adding, etc. elements, but this is also within the scope of the present invention.

10: first panel
20: second panel
30: Lead wire
40: Insulating panel
50: metal plate
100: Heating panel

Claims (10)

A first panel, a second panel, a wiring between the first panel and the second panel, and a heat insulating panel on the first panel opposite to the wiring with respect to the wiring,
The wiring is heated by electric power supply,
Wherein the first panel and the second panel each independently comprise flame retardant plastic,
Wherein the heat insulating panel comprises a flame-retardant organic insulating material,
Wherein the flame-retardant organic insulating material is a resol-type phenol resin; At least one selected from expanded graphite and flame retardant; Foam stabilizer; And a resolvent phenolic resin composition comprising a resorcinol phenol resin foam, which is prepared by foaming and curing the resorcinol phenol resin composition. delete The method according to claim 1,
Wherein the heat generating panel further comprises a metal plate on the first panel and / or the second panel in a direction opposite to the wiring with respect to the wiring. The method according to claim 1,
Wherein the heat generating panel further comprises a patterned film on the first panel and / or the second panel in a direction opposite to the wiring with respect to the wiring. The method according to claim 1,
Wherein the electric energy supplied from the solar cell is used. The method according to claim 1,
The flame-retardant plastic may include a thermoplastic resin pulverized to a size of 325 to 800 mesh, an inorganic metal hydroxide pulverized to a size of 800 to 5,000 mesh, a crystalline metallic hydroxide produced by reacting the inorganic basic metal hydroxide with a liquid basic material, And a non-combustible siliceous material. The method according to claim 6,
Wherein the thermoplastic resin is composed of a viscous resin in which 90 to 95% by weight of a polyethylene resin is mixed with 5 to 10% by weight of a hot-melt resin, and the mixture is made into a powder having a size of 325 to 800 mesh. delete The method according to claim 1,
Wherein at least one selected from the expanded graphite and the flame retardant is expanded graphite and a flame retardant. The method according to claim 1,
Wherein the flame retardant is selected from the group consisting of aluminum hydroxide, perlite, magnesium hydroxide, monoammonium phosphate, ammonium polyphosphate, RedPhosphorus, triaryl phosphate, tricresyl phosphate, Wherein the heat generating panel is at least one selected from the group consisting of triethyl phosphate, triphenyl phosphate, dimethyl methylphosphate, and haloalkyl phosphate.

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