KR20190119477A - A fire door comprising a coated and expanded vermiculite and an anti-condensation heat insulating layer - Google Patents

Abstract

The present invention relates to a fire door which comprises: an inner frame of which one side is opened; an anti-condensation heat insulating layer formed on the inner surface of the inner frame; a coated and expanded vermiculite layer formed on the anti-condensation heat insulating layer; and a cover sealing the opened inner frame.

Description

A fire door containing a layer of coated expanded vermiculite and an 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 an anti-condensation insulation layer.

In general, apartments, offices, and multi-family buildings use metal fire doors as front doors in order to reduce fire transmission and penetration damage caused by fires in case of fires. On the other hand, as the fire door is used as the front door, the role of the front door such as preventing unnecessary noise inflow and condensation, or preventing indoor and outdoor heat leakage and movement, as well as its inherent role such as flame penetration and blocking in case of fire. There is also a need to perform.

Vermiculite, on the other hand, is also called vermiculite because of its property of expansion in the form of a leech when heated with minerals belonging to a monoclinic system having a crystal structure such as mica. Structurally, three-layer structured mica-like minerals containing two different types of absorbed water, interlaminar water, and crystalline water, each containing 8 to 16% by weight, and having a distance of 14.4Å between the vermiculite crystals. It is a mineral having a water layer and a small amount of exchangeable cations. In addition, it is easily decomposed into acids, has a large cation exchange capacity, and has good absorption ability, making it suitable for use as heat-resistant materials and soundproofing materials. When the vermiculite is heated at 800 to 1,100 ° C, the water present between the layers is changed to water vapor, and when pressure is applied, it expands 6 to 30 times and expands to become expanded vermiculite, which is a porous crystal, and has a low specific gravity of about 0.12 to 0.2. Good heat resistance, excellent thermal insulation and sound insulation. Therefore, research is being conducted to obtain not only flame penetration and transmission, but also insulation and sound insulation effects by filling such vermiculite inside a fire door which is widely used as a front door.

However, the porosity of expanded vermiculite has a problem that light weight, tensile strength, and thermal insulation can be significantly lowered due to the capillary phenomenon, and in buildings, the temperature of the atmosphere, including moisture, is lowered below the dew point. Surface condensation, which is a kind of water condensation on the surface of an object, occurs frequently. Such surface dew condensation is easily generated by high humidity or a large temperature difference between indoors and outdoors, and forms stains on the floor and wall surfaces of buildings, causing decay and mold, especially in the case of fire doors used as front doors today. As the boundary separating the outside, the temperature inside and outside the space is often different from the boundary, so there is a high possibility of surface condensation inside. On the other hand, when vermiculite is applied to obtain insulation and sound insulation inside the fire door, the tensile condensation of vermiculite is lowered due to such surface condensation, and thus there is a problem that the insulation effect and the sound insulation effect may be significantly reduced.

The present invention is provided with a coating expanded vermiculite layer filled inside the fire door such that the fire door used as the front door has sufficient insulation and soundproofing properties, and the coated expanded vermiculite layer is structurally collapsed due to moisture caused by surface condensation or the like. It is to provide a fire door provided with a condensation prevention insulating material layer formed in the inner frame so as not to show a deterioration in performance.

In the present specification, the inner frame has one surface opened; An anti-condensation insulation layer formed on the inner surface of the inner frame; A coated expanded vermiculite layer formed on the anti-condensation insulation layer; And a cover for sealing the opened inner frame.

In the fire door according to an embodiment of the present invention, the anti-condensation insulation layer is filled with at least one selected from the group consisting of perlite and expanded vermiculite; Organic and inorganic binders having a weight ratio of organic binder to inorganic binder in the range of 5.5: 4.5 to 6: 4; Lubricant comprising a polyacid salt (Fatty Acid Salt); and animal foaming agent comprising an amino acid system and vegetable foam control agent comprising an alkylbenzene sulfonate system, sodium lauryl sulfate system and esters thereof It may be one containing the above bubble control agent.

In the fire door according to an embodiment of the present invention, the anti-condensation insulation layer comprises 50 to 60% by weight of the filler, 30 to 50% by weight of the organic and inorganic binder, 1 to 5% by weight of the lubricant and 0.5 to 1% by weight of the bubble control agent It may 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, 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 is based on 100 parts by weight of expanded vermiculite, sodium silicate 30 to 80 parts by weight, water 80 to 150 parts by weight, glycerin 1 to 10 parts by weight, starch 1 ~ The coating liquid consisting of 10 parts by weight and disaccharides 1 to 10 parts by weight may be coated on expanded vermiculite.

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

The fire door according to an embodiment of the present invention supports the door on both sides of the door and the door, and includes a pair of door frames provided to be spaced apart from the door, the door frame is a groove formed with a condensation preventing insulation layer on the outer surface It may be further provided.

The fire door according to an embodiment of the present invention supports the door and the door on both sides of the door, and comprises a pair of door frames provided to be spaced apart from the door, one or more selected from the door and the door frame is configured to A heat insulation sheet may be further provided in the part which an inner frame and a cover contact.

The fire door according to the present invention has a coating expanded vermiculite layer filled inside the fire door to have sufficient insulation and sound insulation properties, but the coated expanded vermiculite layer exhibits structural collapse or degradation due to moisture caused by surface condensation. You can do that.

In particular, the coated expanded vermiculite filled inside the fire door according to the present invention, due to the coating effectively prevents moisture ingress from the outside, thereby maintaining sufficient thermal insulation and sound insulation properties inherent to the expanded vermiculite, the durability of the expanded vermiculite is maintained for a long time In addition, it has 3 to 7 times better strength than ordinary expanded vermiculite, resulting in less structural deformation.

Furthermore, the fire door according to the present invention is provided with a layer of anti-condensation insulating material in the inner frame, the surface condensation phenomenon according to the indoor and outdoor temperature difference when the fire door is used as the front door and the moisture generated according to the preliminary penetration into the coating expanded vermiculite layer in advance Since it can be blocked, the 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.
Figure 2 schematically shows that the expanded expanded vermiculite layer prepared in the form of a board (panel) in the fire door door according to an embodiment of the present invention is inserted in accordance with the inner frame.
3 is a view showing that the insulating sheet is formed on the fire door according to an embodiment of the present invention.

As the invention allows for various changes and numerous modifications, particular embodiments will be illustrated and described in detail below. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, 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 detail. On the other hand, the term "fire door" used throughout this specification and claims should be understood as a concept that encompasses the door and the door frame.

As described above, according to an embodiment of the present invention, an inner frame of which one surface is opened; An anti-condensation insulation layer formed on the inner surface of the inner frame; A coated expanded vermiculite layer formed on the anti-condensation insulation layer; And a cover for sealing the opened inner frame. A fire door may be provided.

The present inventors have a coated expanded vermiculite layer filled inside the fire door to provide sufficient thermal insulation and sound insulation properties to the fire door, which is widely used as a front door today, and is caused by a temperature difference between the inside and outside of the door. In order to prevent the coating expanded vermiculite layer from collapse or consequently deteriorate due to moisture, when the anti-condensation insulation layer formed on the inner frame is provided together, due to surface condensation caused by a large temperature difference between the inside and the outside, Experiments confirmed that it is possible to effectively prevent the structural collapse of the coated expanded vermiculite layer formed inside the fire door, thereby providing a fire door having a characteristic of effectively maintaining the thermal insulation and sound insulation properties of the coated expanded vermiculite layer. The present invention was completed.

Fire door according to an embodiment of the present invention is the inner frame of one side is opened; An anti-condensation insulation layer formed on the inner bottom of the inner frame; A coated expanded vermiculite layer formed on the anti-condensation 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, should be able to perform a flame penetration and flame blocking role in the fire of the fire door, it may be composed of a non-combustible material. Specifically, since the inner frame is nonflammable and should not be easily bent or broken at the same time, the inner frame may be made of a steel panel having a strong strength, etc. For example, the inner frame may be formed of an iron panel, etc., but may have a rectangular box shape. It may be, or may have a sufficient space to have a coating expansion vermiculite layer therein (see Figure 1). On the other hand, the inner frame may be to form the outer shape of the door, it 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, it may be provided for the purpose of preventing the penetration of moisture in the coating expansion vermiculite layer to be described later. Specifically, fire doors are used today as front doors, so they are used at interior and exterior boundary points with temperature differences. In particular, in summer, air conditioners are operated indoors differently from hot outdoor temperatures, and thus, indoor and outdoor temperature differences become severe, resulting in surface condensation inside the fire door. The moisture thus formed is likely to penetrate the coated expanded vermiculite layer, which will be described later, so that it is provided to block it in advance. In addition, the anti-condensation insulation layer is provided with a coating vermiculite expansion layer to be described later in the form of one or more boards (panel), filling the gap between the board and the board, may serve to bond the board, heat insulation and The expansion effect can also play a role in reinforcing the fire door's inherent function.

On the other hand, the anti-condensation insulation layer according to an embodiment of the present invention can be formed by applying and coating the anti-condensation insulation composition on all the inner surface of the inner frame (see Fig. 1).

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

On the other hand, according to another embodiment of the present invention, the anti-condensation insulation layer is the above-mentioned components, specifically, 50 to 60% by weight of the filler, 30 to 50% by weight of the organic and inorganic binder, 1 to 5% by weight of the lubricant And 0.5 to 1% by weight of the bubble control agent may be included.

First, perlite is an artificial soil made by heating and expanding volcanic pearl pearls at 850 to 1200 ° C. When pearl pearls are heated at high temperatures, moisture (about 2 to 6%) inside them expands and expands. Produced using the phenomenon.

Pearlite according to an embodiment of the present invention may be a closed cell expanded pearl cancer hollow particles and open pores (open cell) expanded pearl cancer hollow particles may be included in a weight ratio of 5: 5 to 6: 4. When the closed pore expanded pearl and the open pore expanded pearl in the pearlite is included in the weight ratio of the above range, it is possible to effectively block the heat transfer to ensure a sufficient thermal insulation effect, as well as quick drying effect. On the other hand, the average particle diameter of the closed pore expanded pearlstone hollow particles used may be, for example, 200 to 800㎛.

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

The expanded vermiculite used in accordance with one embodiment of the present invention has a particle diameter of 0.2 to 20 mm, specific gravity of 0.15 or less may be used. The expanded vermiculite having the particle diameter and specific gravity has an effect of imparting sufficient thermal insulation to the condensation preventing insulation layer of the present invention.

On the other hand, the organic binder contained in the anti-condensation insulating material layer may include one or more 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 crack prevention, 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 50,000 to 70,000.

When butyl acrylate and methyl acrylate are used in the organic binder 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 cracks and improving water resistance.

On the other hand, the inorganic binder contained in the anti-condensation insulating material layer may be a binder containing silica. The silica-containing binder further improves the adhesive performance by performing a crosslinking role between the organic binder compound and the organic binder compound, and combines with the bulking binder to suppress the coating film formation, thereby shortening the drying time and securing fine pores. Thereby, there is an effect of suppressing thermal conduction, and the effect can be optimized when the weight ratio of the organic binder to the inorganic binder to be used is in 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 is swollen, and the separation with the inorganic filler is suppressed, allowing homogeneous blending to be stabilized.

On the other hand, the lubricant contained in the anti-condensation insulation layer to reduce the friction between the expanded pearl rock particles to prevent adhesion with the plastering knife during construction work, it is possible to uniform construction. Lubricants used according to an embodiment of the present invention may include a fatty acid salt (Fatty Acid Salt), for example, in the group consisting of oleate, palmitate, stearin, palm fatty acid salt, glycerin salt It may be one or more selected.

On the other hand, the bubble control agent contained in the anti-condensation insulation layer serves to improve the uniformity and storage stability of the composition by suppressing the bubbles of large particles generated by the mechanical force in the process of stirring, and the like. Foam control agent used in accordance with one embodiment of the present invention is one or more bubbles selected from the group consisting of animal foaming agents including amino acid-based and vegetable foaming agents including alkylbenzene sulfonate-based, sodium lauryl sulfate-based and esters thereof. May be a regulator.

On the other hand, the anti-condensation insulation layer is as described above, the anti-condensation insulation composition to the inner surface of the inner frame (referred to as 'inside surface' in the present specification and claims), in detail, all the inner surface of the coating and coating It may be formed by, specifically, the anti-condensation insulation composition and the anti-condensation insulation layer is 50 to 60% by weight of the filler described above, 30 to 50% by weight of organic and inorganic binder, 1 to 5% by weight of lubricant and 0.5 to 0.5 bubble control agent It may be to include 1% by weight.

The composition may be prepared by mixing the above-described components simultaneously or sequentially and then stirring, when the filler is included in 50 to 60% by weight based on the total weight of the composition, to maintain the adhesion strength and to meet the thermal conductivity There is an effect. On the other hand, when the organic and inorganic binder is contained in 30 to 50% by weight based on the total weight of the composition, there is an effect to maintain the pores and to meet the adhesion strength. On the other hand, when the lubricant is included in 1 to 5% by weight based on the total weight of the composition, it enables a uniform construction without affecting the thermal conductivity and adhesion strength performance. On the other hand, when the bubble control agent is included in 0.5 to 1% by weight based on the total weight of the composition, the uniformity and storage stability of the composition is sufficiently improved without affecting the thermal conductivity and adhesion strength performance.

Next, the coating expansion vermiculite layer 30 according to an embodiment of the present invention formed on the anti-condensation insulating material layer is provided to give sufficient thermal insulation and sound insulation properties to the fire door, specifically, rapid cooling to room temperature It may be to include a coating expanded vermiculite and an inorganic binder obtained through the process. Specifically, the coated expanded vermiculite layer may be prepared by mixing the coated expanded vermiculite and an inorganic binder, inserting and compressing the above-mentioned anti-condensation insulating material layer, and then drying by using a thermal medium or a high frequency, or coating that is stirred outside. The expanded vermiculite is moved in the form of a plate by moving with a conveyor belt, compressed and dried by a roller or a press, and automatically cut (cutting) into a board (panel) of a desired size. The board (panel) may be formed in a form that is inserted into the inner frame formed with the anti-condensation insulating material layer (see Fig. 2).

For example, the coated expanded vermiculite is pre-heated to swell the expanded vermiculite by injecting it into a known firing facility in the state of crushing the raw vermiculite to be suitable for the purpose by classifying by appropriate particle size and applying heat of 800 to 1,100 ° C. It may be one. Thereafter, the preheating step is continued to maintain the expanded vermiculite having a temperature of 100 ~ 150 ℃. In this case, the preheating means that the calcined expanded vermiculite is continuously maintained at a temperature of 100 to 150 ° C. as it does not undergo a cooling or drying process for the expanded vermiculite calcined through the preheating step. When calcined expanded vermiculite is cooled below a temperature of 100 to 150 ° C, it is defined to include a temperature of 100 to 150 ° C through separate heating. In addition, when the temperature of the expanded vermiculite is less than 100 ° C., non-uniform coating occurs. On the other hand, when the temperature exceeds 150 ° C, the expanded expanded vermiculite expands by 4 to 10 times as the firing step proceeds, so that the hardness becomes weak due to the expanded pores and thinned surfaces, and thus easily breaks during molding and pressing processes. There is a problem. In the preheating step, the expanded vermiculite in the preheated state is provided with a plurality of coating liquid injection devices thereon, and the coating step is performed as the paddle method is stirred and transferred while passing through the vermiculite coating machine equipped with a separate coating liquid storage tank. In the coating step, the coating liquid is sprayed on the foamed vermiculite preheated to 100 ~ 150 ℃ in a condition that hot air of 200 ℃ or more is introduced into the coating machine, and is gradually stirred by a paddle method, the coating liquid injection with a pressure device The coating liquid is provided by the device three to five times. In this case, in order to prevent the expanded vermiculite introduced in the coating step from dropping to 60 to 80 ° C. with steam generation, the temperature of the expanded vermiculite may be maintained at 100 to 150 ° C. by providing hot air of 200 ° C. or more into the coating machine. .

Coating expanded vermiculite according to an embodiment of the present invention is a coating liquid is coated on the expanded vermiculite, the coating liquid used in the above is 30 to 80 parts by weight of sodium silicate, 80 to 150 parts by weight of water, glycerin 1 ~ 10 parts by weight, starch may include 1 to 10 parts by weight, disaccharide 1 to 10 parts by weight. The disaccharide may be sucrose. Upon completion of the coating step, the coated expanded vermiculite is cooled to room temperature by rapid cooling with a cooling device, such as a rapid cooling cooler, associated with a refrigerant supply. At this time, by rapidly cooling the expanded vermiculite of 100 ° C or more of the coating completed using a rapid cooling cooler at room temperature, the coating liquid does not dry to the surface of the expanded vermiculite and is dried and fixed to have viscosity, thereby improving the strength of the expanded vermiculite. Therefore, the coating expanded vermiculite also maintains its shape without being easily broken by the viscosity of the coating liquid in various molding processes such as panel manufacturing, thereby improving durability and strength of the product. This is because, in case of expanded vermiculite to which a coating liquid containing sodium silicate is applied, the coating liquid may be melted again when heated and dried, or the moisture of the expanded vermiculite may be excessively removed, thereby increasing the possibility of damaging the intrinsic properties of the expanded vermiculite. To solve. After the cooling step, the coated expanded vermiculite may be manufactured by passing the coated expanded vermiculite of the present invention through a bucket conveyor, and then wrapping and wrapping the coated expanded vermiculite of the present invention. On the other hand, in the present specification, the room temperature should be understood to refer to a temperature range of 20 to 30 ℃, more specifically 25 ℃.

On the other hand, in order to form the coating expanded vermiculite layer and the inorganic coating is stirred with a coating expanded vermiculite layer is a material that is configured to be cured in a short time by mixing in the coated vermiculite, in detail hardening the coated expanded vermiculite at room temperature It is a substance formulated to be. Specifically, it is a material configured to give a firm adhesion by reacting with glycerin, starch, sugar (disaccharide), 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, acidic clay, zeolite, potassium hydroxide, barium hydroxide, magnesium hydroxide, kaolin clay, calcium sulfate, polyvinyl alcohol, aluminum oxide and water glass; It may be to include.

On the other hand, when forming the coated expanded vermiculite layer, after stirring the coated expanded vermiculite and the inorganic binder, and filling it on the anti-condensation insulating material layer, after pressing and planarizing, by using a room temperature drying or a thermal medium and high frequency The drying process may be performed.

For example, when utilizing a heat medium, it is possible to proceed by selecting a hot press method, and according to the hot press method, the filled and expanded coated vermiculite prepared and stirred in accordance with the previously prepared inner condensation preventing insulation layer is filled. After pressing, the coating may be manufactured by drying the expanded expanded vermiculite layer by applying heat of 120 to 150 ° C. in a thermal medium boiler method. Alternatively, high-frequency microwaves can be used, and the coated expanded vermiculite is compressed with a primary cooling press, and then the coated expanded vermiculite layer is dried by applying microwaves (magnetron irradiation) of high-frequency microwave (magnetron irradiation) to heat at 200 to 250 ° C. can do. Thereafter, through the inner frame finishing step by placing the cover 10 of the same material as the inner frame on the open one surface of the inner frame to seal the inner frame to finish.

Alternatively, the coated expanded vermiculite, prepared as described above, is compressed into a roller or press while moving using a conveyor belt, and dried in a plate shape, and automatically cut to form 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 frame and the door frame to support the door positioned on both sides of the door, of which, as in the case of the door frame, the same form as the fire door, the inner frame; An anti-condensation insulation layer formed on the inner surface of the inner frame; A coated expanded vermiculite layer formed on the anti-condensation insulation layer; And a cover for sealing the opened inner frame. In particular, the case of the door frame may be provided on both sides of the door to support the door when opening and closing the door, specifically, to be used in the form that the door is inserted into the end of the door frame provided on both sides of the door (See FIG. 1). On the other hand, between the door and the door frame there may be a fine or partially spaced space for opening and closing or air circulation, the door frame is a groove portion formed with an anti-condensation insulation layer on the outer surface so as to fill the space so separated in the event of a fire (Sealing groove part) can be further provided. The groove portion may be configured in a form of a portion of the inner frame, the groove portion can be additionally filled and provided with the desired amount of the anti-condensation insulation layer described above (see Fig. 1). In addition, at least one selected from the door and the door frame may further include a heat insulation sheet 40 at a portion where the inner frame and the cover are in contact with each other, and the heat insulation sheet 40 lowers the heat conductivity transferred to the iron plate (inner frame and cover). It may be provided for the purpose of thermal insulation (see Figure 3). The insulating sheet 40 is selected from vermiculite, pearlite, ceramics, glass-wool, aerogel, cerakool, 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 is provided with a coating expanded vermiculite layer filled inside the fire door so that the fire door has sufficient thermal insulation and sound insulation properties, the coating expanded vermiculite layer is caused by surface condensation, etc. Moisture can be prevented from collapsing structures or degrading performance. In particular, the coated expanded vermiculite formed inside the fire door according to the present invention, due to the coating, by effectively preventing the ingress of moisture from the outside, it is possible to maintain sufficient thermal insulation and sound insulation properties inherent to the expanded vermiculite, the durability of the expanded vermiculite is maintained for a long time, It has 3 ~ 7 times better strength than general expanded vermiculite, resulting in less structural deformation. Furthermore, the fire door according to the present invention is provided with an anti-condensation insulation layer formed on the inner frame, so that when the fire door is used as the front door, the surface condensation phenomenon according to the indoor and outdoor temperature difference, and the moisture generated thereby penetrates into the coating expanded vermiculite layer. Since it is possible to block in advance, the insulation and sound insulation properties and durability of the fire door can be maintained for a long time.

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

Claims (9)

An inner frame of which one side is opened;
An anti-condensation insulation layer formed on the inner surface of the inner frame;
A coated expanded vermiculite layer formed on the anti-condensation insulation layer; And
And a lid sealing the opened inner frame.
The method of claim 1,
The anti-condensation insulation layer is filled with at least one selected from the group consisting of perlite (Perlite) and expanded vermiculite (Expanded Vermiculite);
Organic and inorganic binders having a weight ratio of organic binder to inorganic binder in the range of 5.5: 4.5 to 6: 4;
Lubricants including Fatty Acid Salt; And
A fire door comprising at least one foam control agent selected from the group consisting of an animal foaming agent comprising an amino acid system and a vegetable foam control agent comprising an alkylbenzene sulfonate system, sodium lauryl sulfate system and esters thereof.
The method of claim 2,
The anti-condensation insulation layer is 50 to 60% by weight of the filler, 30 to 50% by weight of the organic and inorganic binder, 1 to 5% by weight of the lubricant and 0.5 to 1% by weight of the bubble control agent.
The method of claim 3, wherein
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 is composed 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 disaccharide based on 100 parts by weight of expanded vermiculite. A fire door in which the coating liquid is coated on expanded vermiculite.
The method of claim 5,
The inorganic binder is silicate; At least one additive selected from the group consisting of sodium casein, polyvinylpyrrolidone, acidic clay, zeolite, potassium hydroxide, barium hydroxide, magnesium hydroxide, kaolin clay, calcium sulfate, polyvinyl alcohol, aluminum oxide and water glass; Fire door to be.
The method of claim 1,
The fire door supports the door on both sides of the door and the door, and includes a pair of door frames provided to be spaced apart from the door,
The door frame is a fire door further comprises a groove formed with a layer of anti-condensation insulation on the outer surface.
The method of claim 1,
The fire door supports the door on both sides of the door and the door, and includes a pair of door frames provided to be spaced apart from the door,
At least one selected from the door and the door frame is further provided with a thermal insulation sheet in the contact portion of the inner frame and the cover constituting the fire door.

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