KR102177822B1 - A fire door comprising a coated and expanded vermiculite and an anti-condensation heat insulating layer - Google Patents

Abstract

The present invention is an inner frame with one side open; A condensation-preventing heat insulating material layer formed on the inner surface of the inner frame; A coated expanded vermiculite layer formed on the condensation preventing insulation layer; And a cover sealing the opened inner frame.

Description

A fire door including a layer of coated expanded vermiculite and anti-condensation insulation layer {A FIRE DOOR COMPRISING A COATED AND EXPANDED VERMICULITE AND AN ANTI-CONDENSATION HEAT INSULATING LAYER}

The present invention relates to a fire door comprising a coated expanded vermiculite and a condensation preventing insulation layer.

In general, apartments, offices, and multi-family buildings use metal fire doors as front doors that can reduce flame transmission and penetration damage caused by fire in preparation for a fire. On the other hand, since fire doors are used as front doors, and in addition to their unique roles such as penetration and blocking of flames in case of fire, the role of front doors is to block unnecessary noise inflow and condensation, or to prevent heat leakage and movement indoors and outdoors. There is also a need to perform.

On the other hand, vermiculite is also called vermiculite due to its property of expanding into a leech when heated with a mineral belonging to a monoclinic system having a crystal structure like mica. Structurally, it is a three-layered mica-like mineral, containing 8 to 16% of the total weight of absorbed water, interlayer water and crystal water with different properties, and two layers with a distance of 14.4Å in the middle of vermiculite crystals. It is a mineral with a water layer of and a trace amount of exchangeable cations. In addition, it is easily decomposed by acid, has high cation exchange capacity, and good absorption capacity, so it is suitable for use as a heat-resistant material and soundproofing material. When such vermiculite is heated at 800 ~ 1,100℃, the moisture present between the layers changes into water vapor, and as pressure is applied, it exfoliates and expands by 6 ~ 30 times to become expanded vermiculite, which is a porous crystal, and has a low specific gravity of 0.12 ~ 0.2. , It withstands heat well, and has excellent thermal insulation and sound insulation effects. Therefore, research is being conducted to obtain the heat insulation and sound insulation effects as well as preventing flame penetration and transmission by filling and applying such vermiculite inside the fire door, which is widely used as a front door today.

However, the porosity of expanded vermiculite has a problem that light weight, tensile strength, and thermal insulation properties, etc., may be significantly lowered when moisture permeation due to the capillary phenomenon.In buildings, the temperature of the atmosphere including moisture is lowered below the dew point, so that the moisture contained in the atmosphere is reduced. Surface condensation, which is a kind of water condensation that forms water droplets on the surface of an object, is common. Such condensation on the surface is easily generated as the humidity increases or the temperature difference between indoors and outdoors increases, and it forms stains on the floor and wall surfaces of buildings, and causes decay and mold.In particular, fire doors used as entrance doors today are indoors. ·As a boundary that separates the outside, there are many cases of differences in temperature between indoors and outdoors based on this boundary, so there is a high possibility that condensation on the surface will form inside the boundary. On the other hand, when vermiculite is applied to the interior of the fire door to obtain heat insulation and sound insulation, the tensile strength of the vermiculite decreases due to such a condensation on the surface, and accordingly, there is a problem that the insulation effect and sound insulation effect may be significantly reduced.

The present invention is provided with a coated expanded vermiculite layer filled inside the fire door so that the fire door used as a front door today has sufficient heat insulation and sound insulation properties, but the structure collapsed due to moisture generated by surface condensation, etc. It is intended to provide a fire door provided with a condensation-preventing insulation layer formed on the inner frame so as not to deteriorate performance.

In the present specification, one side of the inner frame is opened; A condensation-preventing heat insulating material layer formed on the inner surface of the inner frame; A coated expanded vermiculite layer formed on the condensation preventing insulation layer; It provides a fire door comprising a; and a cover for sealing the opened inner frame.

In the fire door according to an embodiment of the present invention, the condensation-preventing insulation layer is a filler comprising at least one selected from the group consisting of perlite and expanded vermiculite; Organic and inorganic binders in which the weight ratio of the organic binder to the inorganic binder ranges from 5.5:4.5 to 6:4; Lubricant containing polyhydric fatty acid salt; And one selected from the group consisting of animal foaming agents including amino acids and vegetable foaming agents including alkylbenzene sulfonate, sodium lauryl sulfate and esters thereof It may contain the above bubble control agent.

In the fire door according to an embodiment of the present invention, the condensation preventing insulation layer contains 50 to 60% by weight of a filler, 30 to 50% by weight of organic and inorganic binders, 1 to 5% by weight of a lubricant, and 0.5 to 1% by weight of a foam control agent It can be.

In the fire door according to an embodiment of the present invention, the organic binder is selected from the group consisting of butyl acrylate and methyl acrylate, and the inorganic binder may be a binder containing silica.

In the fire door according to an embodiment of the present invention, the coated expanded vermiculite layer may include a coated expanded vermiculite and an inorganic binder obtained through a rapid cooling process to room temperature.

In the fire door according to an embodiment of the present invention, the coated expanded vermiculite, based on 100 parts by weight of expanded vermiculite, 30 to 80 parts by weight of sodium silicate, 80 to 150 parts by weight of water, 1 to 10 parts by weight of glycerin, 1 to 1 starch A coating solution consisting of 10 parts by weight and 1 to 10 parts by weight of disaccharide may be coated on expanded vermiculite.

In the fire door according to an embodiment of the present invention, the inorganic binder is silicate; Including one or more additives selected from the group consisting of casein sodium, polyvinylpyrrolidone, acid clay, zeolite, potassium hydroxide, barium hydroxide, magnesium hydroxide, kaolin clay, calcium sulfate, polyvinyl alcohol, aluminum oxide and water glass It can be.

A fire door according to an embodiment of the present invention includes a door and a pair of door frames provided to support the door at both sides of the door and to be spaced apart from the door, and the door frame is a groove in which a condensation-preventing insulation layer is formed on an outer surface. It may have more wealth.

A fire door according to an embodiment of the present invention includes a door and a pair of door frames that support the door at both sides of the door and are spaced apart from the door, and at least one selected from the door and the door frame constitutes the same. An insulating sheet may be further provided at a portion where the inner frame and the cover are in contact.

The fire door according to the present invention has a coated expanded vermiculite layer filled inside the fire door to have sufficient heat insulation and sound insulation properties, but the coated expanded vermiculite layer does not exhibit structural collapse or performance degradation due to moisture generated by surface condensation. Can be avoided.

In particular, the coated expanded vermiculite filled in the fire door according to the present invention can maintain sufficient heat insulation and sound insulation properties inherent to the expanded vermiculite by effectively preventing moisture penetration from the outside due to the coating, so that the durability of the expanded vermiculite is maintained for a long time. , It has 3 to 7 times higher strength than general expanded vermiculite, so structural deformation is less.

Furthermore, the fire door according to the present invention has a condensation-preventing insulation layer on the inner frame, so that when the fire door is used as the front door, the surface condensation phenomenon according to the temperature difference between indoors and outdoors and the moisture generated accordingly penetrates the inside of the coated expanded vermiculite layer. Since it can be blocked, the heat insulation and sound insulation properties and durability of the fire door can be maintained for a long time.

1 schematically shows a fire door according to an embodiment of the present invention.
2 schematically shows that a coated expanded vermiculite layer manufactured in the form of a board (panel) is inserted into the inner frame in the fire door door according to an embodiment of the present invention.
3 is a view showing that a heat insulating sheet is formed on the fire door according to an embodiment of the present invention.

The present invention will be described in detail below and exemplify specific embodiments, as various changes can be made and various forms can be obtained. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Hereinafter, a fire door according to a specific embodiment of the present invention will be described in more detail. Meanwhile, the term “fire door” used throughout the specification and claims should be understood as a concept that encompasses the door leaf and the door frame.

As described above, according to an embodiment of the present invention, one side is opened inner frame; A condensation-preventing heat insulating material layer formed on the inner surface of the inner frame; A coated expanded vermiculite layer formed on the condensation preventing insulation layer; And a cover for sealing the opened inner frame.

The inventors of the present invention have a coated expanded vermiculite layer filled in the interior of the fire door so as to impart sufficient heat insulation and sound insulation properties to the fire door that is widely used today as the front door, but it is caused by the temperature difference between the interior and the exterior bordered by the front door. In order not to collapse the structure of the coating-expanded vermiculite layer due to moisture, or to reduce performance accordingly, when a condensation-preventing insulation layer formed on the inner frame is provided together, due to the surface condensation phenomenon caused by a large temperature difference between indoors and outdoors, It was confirmed through experiments that it is possible to effectively prevent structural collapse of the coated expanded vermiculite layer formed inside the fire door, and thus provide a fire door with characteristics that effectively maintain the insulation and sound insulation properties of the coated expanded vermiculite layer. And completed the present invention.

Fire door according to an embodiment of the present invention is an inner frame with an open side; A condensation-preventing heat insulating material layer formed on the inner bottom surface of the inner frame; A coated expanded vermiculite layer formed on the condensation preventing insulation layer; And a cover formed on the coated expanded vermiculite layer and sealing the opened inner frame. It may include.

The inner frame 10 is provided on the outermost side of the fire door, and should be able to perform the role of flame penetration and flame blocking in the event of a fire inherent in the fire door, and may be made of a non-combustible material with non-combustibility. Specifically, since the inner frame is non-flammable and should not be easily bent or broken at the same time, it may be composed of a steel panel or the like having strong strength. For example, the inner frame is composed of an iron panel or the like, but has a rectangular box shape. Alternatively, it may have enough space to have a coated expanded vermiculite layer therein (see FIG. 1). On the other hand, the inner frame may be to form the outer shape of the door, or may be to form the outer shape of the door frame.

Next, the anti-condensation insulation layer 20 formed on the inner surface of the inner frame is located inside the fire door, and may be provided for the purpose of preventing moisture from penetrating into the coated expanded vermiculite layer, which will be described later. Specifically, fire doors today are used as front doors, so they are used at the boundary between indoors and outdoors where there is a temperature difference. In particular, in summer, unlike the hot outdoor temperature, the air conditioner is often operated indoors. Accordingly, the temperature difference between indoors and outdoors becomes severe, and condensation on the surface may occur inside the fire door. Since the moisture thus formed may penetrate into the coated expanded vermiculite layer, which will be described later, it is provided to block it in advance. In addition, when the condensation preventing insulation layer is provided in the form of one or more boards (panels) with a coated vermiculite expansion layer to be described later, it may fill the gap between the board and the board, and may serve to bond the board. It can also play a role of reinforcing the unique function of the fire door through the expansion effect.

On the other hand, the condensation-preventing insulation layer according to an embodiment of the present invention may be formed by applying and coating a condensation-preventing insulation composition on all inner surfaces of the inner frame (see FIG. 1).

In an embodiment of the present invention, the anti-condensation insulation layer is a filler comprising at least one selected from the group consisting of perlite and expanded vermiculite; the weight ratio of the organic binder to the inorganic binder is 5.5: 4.5 to 6 : Organic and inorganic binders in the range of 4; Lubricant containing a polyfatty acid salt; And an animal foaming agent including an amino acid type and a vegetable foaming agent including an alkylbenzene sulfonate type, sodium lauryl sulfate type, and an ester thereof.

On the other hand, according to another embodiment of the present invention, the condensation-preventing insulation layer includes the above-described components, specifically, 50 to 60% by weight of filler, 30 to 50% by weight of organic and inorganic binders, 1 to 5% by weight of lubricant And 0.5 to 1% by weight of a foam control agent.

First, Perlite is an artificial soil made by heating and expanding perlite produced by volcanic action at 850 to 1200°C. When perlite is instantaneously heated with high heat, moisture (about 2 to 6%) in it is released and expands. It is produced using the phenomenon.

Pearlite according to an embodiment of the present invention may be a closed cell (closed cell) expanded pearl rock hollow particles and open pores (open cell) expanded pearl rock hollow particles are included in a weight ratio of 5:5 to 6:4. In the case where the closed pore-expanded pearl arm and the open pore-expanded pearl arm are included in the weight ratio within the above range, heat transfer can be effectively blocked to ensure sufficient heat insulation effect, as well as quick drying effect. Meanwhile, the average particle diameter of the hollow particles of the closed pore expanded pearl cancer used may be, for example, 200 to 800 μm.

Next, expanded vermiculite is expanded by heat treatment of vermiculite. When the vermiculite is heat-treated and expanded, it expands about 6 to 20 times depending on the conditions of the heat treatment and the properties of the raw material. The expanded vermiculite is widely used as a building material, such as used as a good insulation material and as an aggregate and sound-absorbing material for lightweight concrete, as it has a very low specific gravity and excellent insulation and sound barrier properties (soundproof effect). Is used. In addition, it is also used as a filler for paper, plastic, paint, and weight, and also as a packing material when packaging.

The expanded vermiculite used according to an embodiment of the present invention has a particle diameter of 0.2 to 20 mm, and a specific gravity of 0.15 or less may be used. The expanded vermiculite having the particle diameter and specific gravity has the effect of imparting sufficient thermal insulation to the anti-condensation insulating material layer of the present invention.

Meanwhile, the organic binder included in the condensation-preventing heat insulating material layer may include at least one selected from the group consisting of a crack-preventing binder and a bulking binder. In one embodiment of the present invention, the organic binder may be at least one selected from the group consisting of butyl acrylate and methyl acrylate. The butyl acrylate may play a role of preventing cracking, and may be a polymer having a molecular weight of about 60,000 to 90,000. The methyl acrylate may serve to improve water resistance and adhesion strength, and may be a polymer having a molecular weight of about 50,000 to 70,000.

In the organic binder, when butyl acrylate and methyl acrylate are used in a weight ratio within the range of 3:7 to 4:6, it is possible to provide an optimized effect in terms of preventing cracking and improving water resistance.

Meanwhile, the inorganic binder included in the condensation preventing heat insulating material layer may be a binder containing silica. The binder containing silica further improves adhesion performance by performing a crosslinking role between the organic binder compound and the organic binder compound, and reduces the drying time and secures fine pores by binding with the bulking binder to inhibit the formation of a coating film. By doing so, there is an effect of suppressing heat conduction, and the effect can be optimized when the weight ratio of the organic binder to the inorganic binder used is within the range of 5.5:4.5 to 6:4.

On the other hand, when the organic binder and the inorganic binder are mixed and used, a part of the binder swells, so that separation from the inorganic filler is suppressed, thereby enabling a homogeneous blending, thereby stabilizing the composition.

On the other hand, the lubricant included in the condensation prevention insulation layer reduces friction between the expanded pearlite particles to prevent adhesion to the plastering knife during construction work, and enables uniform construction. The lubricant used according to an embodiment of the present invention may include a polyvalent fatty acid salt (Fatty Acid Salt), for example, in the group consisting of oleic acid salt, palmitic acid salt, steanic acid salt, palm fatty acid salt, and glycerin salt. It may be one or more selected.

On the other hand, the bubble control agent included in the anti-condensation insulation layer plays a role of improving the uniformity and storage stability of the composition by suppressing bubbles of large particles generated by mechanical force in a process such as stirring. The foam control agent used according to an embodiment of the present invention is one or more foams selected from the group consisting of animal foaming agents including amino acids and vegetable foaming agents including alkylbenzene sulfonate, sodium lauryl sulfate, and esters thereof. It can be a modulator.

Meanwhile, as described above, the condensation-preventing insulation layer is applied and coated on the inner side of the inner frame (referred to as'inner side' in the specification and claims), and in detail, on all sides of the inner frame, as described above. Specifically, the condensation-preventing insulation composition and the condensation-preventing insulation layer include 50 to 60% by weight of the above-described filler, 30 to 50% by weight of organic and inorganic binders, 1 to 5% by weight of a lubricant, and 0.5 to 5% by weight of a foam control agent. It may contain 1% by weight.

The composition may be prepared by simultaneously or sequentially mixing and then stirring the above-described constituents, and when the filler is contained in an amount of 50 to 60% by weight based on the total weight of the composition, the adhesive strength is maintained and the thermal conductivity is satisfied. The effect exists. On the other hand, when organic and inorganic binders are included in an amount of 30 to 50% by weight based on the total weight of the composition, there is an effect of maintaining pores and satisfying adhesion strength. On the other hand, when the lubricant is contained in an amount of 1 to 5% by weight based on the total weight of the composition, it enables uniform construction without affecting the thermal conductivity and adhesion strength performance. On the other hand, when the foam control agent is included in an amount of 0.5 to 1% by weight based on the total weight of the composition, uniformity and storage stability of the composition are sufficiently improved without affecting the thermal conductivity and adhesion strength performance.

Next, the coated expanded vermiculite layer 30 according to an embodiment of the present invention formed on the condensation preventing insulation layer is provided to impart sufficient heat insulation and sound insulation properties to the fire door, and specifically, rapid cooling to room temperature It may include a coating-expanded vermiculite obtained through the process and an inorganic binder. Specifically, the coated expanded vermiculite layer may be prepared by mixing the coated foamed vermiculite and an inorganic binder, inserting and compressing it on the above-described anti-condensation insulation layer, and then drying it using a thermal medium or high frequency, or a coating stirred from the outside. Expanded vermiculite is moved using a conveyor belt, compressed with a roller or press, and dried into a plate shape, and automatically cut to produce a board (panel) of the desired size, and then at least one manufactured as above. It may be formed in the form of inserting the board (panel) into the inner frame in which the condensation preventing insulation layer is formed (see FIG. 2).

For example, the expanded vermiculite is calcined by preheating the expanded vermiculite by classifying it by appropriate particle size and putting it into a known sintering facility in a state where it is crushed and expanding it by applying heat of 800 to 1,100°C. It may be one. Thereafter, it is kept as expanded vermiculite having a temperature of 100 to 150°C through a preheating step. At this time, the term preheating means when the calcined expanded vermiculite is continuously maintained at a temperature of 100 to 150°C as the cooling or drying process is not performed on the expanded vermiculite calcined through the preheating step or during the transfer process. When the calcined expanded vermiculite is cooled to a temperature of 100 to 150°C or less, it is defined as including making it a temperature of 100 to 150°C through separate heating. In addition, when the temperature of the expanded vermiculite is less than 100 ℃, a non-uniform coating is formed. On the other hand, if the temperature exceeds 150℃, the sintering step is performed and the expanded vermiculite expands 4 to 10 times more, and the hardness is weakened by the expanded pores and the thinner surface, making it easier to break in the molding and pressing process. There is a problem of losing. The expanded vermiculite in the preheated state in the preheating step is agitated and transferred in a paddle manner while passing through a vermiculite coater equipped with a plurality of coating liquid spraying devices and a separate coating liquid storage tank, thereby performing the coating step. In the coating step, the coating liquid is sprayed on the foamed vermiculite preheated to 100 to 150 °C under conditions in which hot air of 200 °C or higher is introduced into the coating machine, and is gradually transferred and stirred in a paddle method, and the coating liquid spraying with a pressurizing device The coating solution is provided 3 to 5 times by the device. At this time, in order to prevent the temperature of the expanded vermiculite injected in the coating step from dropping to 60 ~ 80℃ with the generation of water vapor, the temperature of the expanded vermiculite can be maintained at 100 ~ 150℃ by providing hot air of 200℃ or higher into the coating machine. .

The coated expanded vermiculite according to an embodiment of the present invention is a coating solution coated on the expanded vermiculite, and the coating solution used in the above is 30 to 80 parts by weight of sodium silicate, 80 to 150 parts by weight of water, 1 to 1 of glycerin It may contain 10 parts by weight, 1 to 10 parts by weight of starch, and 1 to 10 parts by weight of disaccharide. The disaccharide may be sucrose. When the above-described coating step is completed, the coated expanded vermiculite is rapidly cooled by a cooling device coupled with a refrigerant supply, such as a rapid cooling cooler, and cooled to a room temperature level. At this time, by rapidly cooling the coated expanded vermiculite to room temperature using a rapid cooling cooler or the like, the coating liquid does not dry to the surface of the expanded vermiculite, but is dried and fixed to have viscosity, thereby improving the strength of the expanded vermiculite. Therefore, even in various molding processes such as panel manufacturing in the future, the coated expanded vermiculite is not easily broken by the viscosity of the coating solution and can maintain its shape, thereby improving the durability and strength of the product. In the case of expanded vermiculite to which a coating solution containing sodium silicate is applied, when heated and dried, the component of the coating solution is re-dissolved to become liquefied, or the moisture of the expanded vermiculite itself is excessively removed, increasing the possibility of damaging the inherent properties of the expanded vermiculite. It is to solve. The coated expanded vermiculite, which is cooled and dried after the cooling step, is loaded onto a product silo (SILO) through a bucket conveyor, then wrapped, wrapped, and shipped, thereby manufacturing the coated expanded vermiculite of the present invention. On the other hand, in the present specification, the term room temperature should be understood as referring to a temperature in the range of 20 to 30°C, more specifically 25°C.

On the other hand, in order to constitute the coated expanded vermiculite layer, the coated expanded vermiculite layer and the agitated inorganic binder are a material formulated to be cured in a short period of time by mixing with the coated vermiculite. In detail, the coated expanded vermiculite is cured to cure at room temperature. It is a material formulated so that it can be made. Specifically, it is a material formulated to give a solid adhesive strength by reacting with glycerin, starch, sugar (disaccharide) and sodium silicate contained in the coated expanded vermiculite. Here, the reaction may include a neutralization reaction and an ion exchange reaction. Specifically, the inorganic binder according to an embodiment of the present invention is a silicate in which the molar ratio of sodium and silicic acid is adjusted; And at least one additive selected from the group consisting of casein sodium, polyvinylpyrrolidone, acid clay, zeolite, potassium hydroxide, barium hydroxide, magnesium hydroxide, kaolin clay, calcium sulfate, polyvinyl alcohol, aluminum oxide and water glass; It may be included.

On the other hand, when forming the coated expanded vermiculite layer, after stirring the coated expanded vermiculite and the inorganic binder, filling it on the condensation preventing insulation layer, pressing and flattening, drying at room temperature or using a thermal medium and high frequency You can go through the drying process.

For example, in the case of using a thermal medium, a hot press method may be selected to proceed, and according to the hot press method, the prepared and stirred coated expanded vermiculite is filled on the anti-condensation insulation layer of the inner frame prepared in advance. It can be prepared by drying the coated expanded vermiculite layer by applying heat of 120 to 150°C and drying by applying heat of 120 to 150°C in a thermal medium boiler method. Alternatively, a high-frequency microwave can be used. After compressing the coated expanded vermiculite with a primary cooling press, the coated expanded vermiculite layer is dried by applying a high-frequency microwave method (magnetron irradiation method) to 200 ~ 250℃ with a conveyor. can do. Thereafter, through the inner frame closing step, a cover 10 made of the same material as that of the inner frame is positioned on the opened surface of the inner frame to seal the inner frame.

Alternatively, the coated expanded vermiculite prepared as described above is manufactured in a plate shape by compressing and drying it with a roller or press while moving using a conveyor belt, and automatically cutting it into a board (panel) of a desired size. After fabrication, one or more boards (panels) manufactured as described above may be inserted into the inner frame in which the condensation preventing insulation layer is formed (see FIG. 2).

On the other hand, the above-described fire door may be composed of a door and a door frame positioned on both sides of the door to support the door. Among them, the door frame has the same shape as the fire door, and includes an inner frame; A condensation-preventing insulation layer formed on the inner side of the inner frame; A coated expanded vermiculite layer formed on the condensation preventing insulation layer; And a cover that seals the opened inner frame. In particular, in the case of the door frame, it may be provided on both sides of the door and serve to support the door when the door is opened or closed, and specifically, the door may be inserted into the end of the door frame provided on both sides of the door. Can (see Fig. 1). On the other hand, between the door and the door frame, there may be microscopically or partially spaced spaces for opening and closing or for air circulation.In case of fire, the door frame has a condensation-preventing insulation layer formed on the outer surface so as to fill the gap. (Seal mounting groove) may be further provided. The groove portion may be configured in a form in which a part of the inner frame is curved, and the above-described condensation preventing insulation layer may be additionally filled and provided in a desired amount in the groove portion (see FIG. 1). In addition, at least one selected from the door leaf and the door frame may further include an insulation sheet 40 at a portion where the inner frame and the cover contact, and the insulation sheet 40 lowers the heat conduction transmitted to the iron plate (the inner frame and the cover). It may be provided for the purpose of insulation (see Fig. 3). Insulation sheet 40 is selected from vermiculite, pearlite, ceramics, glass-wool, aerogel, cerakwool, diatomaceous earth or clay It may include any one or more.

The fire door according to the present invention manufactured by the above-described method includes a coated expanded vermiculite layer filled inside the fire door so that the fire door has sufficient heat insulation and sound insulation properties, but the coated expanded vermiculite layer is caused by condensation on the surface. It is possible to prevent structural collapse or performance degradation due to moisture. In particular, the coated expanded vermiculite formed inside the fire door according to the present invention can maintain sufficient heat insulation and sound insulation properties inherent to the expanded vermiculite by effectively preventing moisture penetration from the outside due to the coating, so that the durability of the expanded vermiculite is maintained for a long time, It has 3 to 7 times higher strength than general expanded vermiculite, so structural deformation is less. Furthermore, the fire door according to the present invention includes a condensation-preventing insulation layer formed on the inner frame, so that when the fire door is used as a front door, the surface condensation phenomenon according to the temperature difference between indoors and outdoors and the moisture generated accordingly penetrates the inside of the coated expanded vermiculite layer. Since it is possible to block things in advance, the heat insulation and sound insulation properties and durability of the fire door can be maintained for a long time.

10: inner frame, cover 11: door inner frame
20: condensation prevention insulation layer
30: coated expanded vermiculite layer 31: coated expanded vermiculite layer in the form of a board (panel)
40: insulation sheet

Claims (9)

An inner frame with an open one side;
A condensation-preventing heat insulating material layer formed on the inner surface of the inner frame;
A coated expanded vermiculite layer formed on the condensation preventing insulation layer; And
Includes; a cover for sealing the opened inner frame,
The condensation-preventing insulation layer may include a filler comprising at least one selected from the group consisting of perlite and expanded vermiculite;
Organic and inorganic binders in which the weight ratio of the organic binder to the inorganic binder ranges from 5.5:4.5 to 6:4;
Lubricants containing polyhydric fatty acid salts; And
Fire door comprising at least one foam control agent selected from the group consisting of an animal foaming agent containing amino acids and a vegetable foaming agent containing alkylbenzene sulfonate, sodium lauryl sulfate and esters thereof.
delete The method of claim 1,
The anti-condensation insulation layer is a fire door containing 50 to 60% by weight of a filler, 30 to 50% by weight of organic and inorganic binders, 1 to 5% by weight of a lubricant, and 0.5 to 1% by weight of a foam control agent.
The method of claim 3,
The organic binder is selected from the group consisting of butyl acrylate and methyl acrylate, and the inorganic binder is a binder containing silica.
The method of claim 1,
The coated expanded vermiculite layer is a fire door comprising a coated expanded vermiculite and an inorganic binder obtained through a rapid cooling process to room temperature.
The method of claim 5,
The coated expanded vermiculite, based on 100 parts by weight of expanded vermiculite, consisting of 30 to 80 parts by weight of sodium silicate, 80 to 150 parts by weight of water, 1 to 10 parts by weight of glycerin, 1 to 10 parts by weight of starch, and 1 to 10 parts by weight of disaccharides Fire door that coating liquid is coated on expanded vermiculite.
The method of claim 5,
The inorganic binder is a silicate; Casein sodium, polyvinylpyrrolidone, acid clay, zeolite, potassium hydroxide, barium hydroxide, magnesium hydroxide, kaolin clay, calcium sulfate, polyvinyl alcohol, aluminum oxide, and one or more additives selected from the group consisting of water glass; including Fire door to do.
The method of claim 1,
The fire door includes a door leaf and a pair of door frames provided to support the door leaf on both sides of the door leaf and spaced apart from the door leaf,
The door frame is a fire door further comprising a groove portion formed with a condensation preventing insulation layer on the outer surface.
The method of claim 1,
The fire door includes a door leaf and a pair of door frames provided to support the door leaf on both sides of the door leaf and spaced apart from the door leaf,
The door is a fire door further provided with an insulating sheet in a portion in contact with the inner frame and the cover constituting the same.

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