KR20220064680A - Heat Insulation Structure for Fire Door and the Fire Door Equipped with the Same - Google Patents

Abstract

The present invention relates to a heat insulation structure (100) for a fire door comprising: a plate-shaped insulation (10) provided as at least two sheets stacked; an aluminum thin film sheet (20) coated with a fire-resistant coating composition stacked one by one between the plate-shaped insulation (10); and a reinforcing structure (30) for combining and reinforcing the plate-shaped insulation (10). The aluminum thin film sheet (20) is coated with a fire-resistant coating composition on one side or both sides thereof for non-combustibility and heat shielding performance. The fire-resistant coating composition is a composition containing 20-50 parts by weight of a silane compound, 20-100 parts by weight of expanded graphite, and 80-200 parts by weight of sugar, per 100 parts by weight of a binder resin aqueous solution. The reinforcing structure (30) is used for the purpose of imparting strength to the heat insulation structure (100) in order to prevent twisting or bending of a fire door. The reinforcing structure (30) includes two to five vertical supports (31), two to five horizontal supports (32), and z-axis supports (that is, height supports) (33) vertically fixed to the vertical supports (31) at intervals of 15 to 30 cm, and each of supports (31, 32, 33) is fixed to each other by welding. Therefore, the present invention has effects of providing a new insulation structure for a fire door to manufacture a fire door having excellent heat and insulation performance and not causing twisting or bending.

Description

Heat Insulation Structure for Fire Door and the Fire Door Equipped with the Same}

The present invention relates to a fire door. More specifically, the present invention relates to a heat insulating material structure built into the fire door and a fire door having the heat insulating material structure built therein.

The inside of the fire door is essentially a built-in insulation structure. A fire door is a door installed to block flame and heat in the event of a fire, and an insulating material structure having heat shielding and heat insulating functions is installed and assembled inside the door.

A fire door refers to a door that has secured the performance stipulated in Article 26 of the “Rules for Standards for Evacuation and Fire Protection Structures of Buildings, etc.” and this standard. Fire doors must have fire resistance test performance in accordance with KS F 2268-1 (fire resistance test method for fire doors). Fire doors must also ensure torsional strength, vertical load strength, opening/closing force, opening/closing repeatability and impact resistance according to KS F 3109 (door set).

A fire door usually has a size of 1,000 x 2,100 mm in width x 2,100 mm and a thickness of about 40 to 120 mm. Fire doors are installed in various buildings such as houses, apartments, office buildings, and shopping malls to prepare for fire. For fire doors, a steel door frame is fixed to the wall, and the fire door is installed using a hinge on the door frame. A fire door consists of a main body by combining an inner plate and an outer plate made of steel, and the inside is usually filled with an insulating material to block heat in case of fire.

The insulating material filled inside the fire door blocks heat in normal times to prevent dew condensation that appears on the fire door on the indoor side. Condensation occurs seriously in winter when the temperature difference between indoors and outdoors is large, and also occurs frequently in the spring and autumn seasons. In case of fire, the insulating material filled inside the fire door serves to block the flame and heat that can enter the room.

The fire door consists of an inner plate and an outer plate, and the inner and outer plates are bent at both ends, so that the bent part of the outer plate enters the bent part of the inner plate and is joined by a plurality of rivets. In the space between the inner plate and the outer plate, an insulating material structure is installed and assembled. Insulation materials used include synthetic resin foams such as glass fiber or urethane foam, which are non-combustible materials.

In Patent Publication No. 2018-0016282, a first plate-shaped member, a second plate-shaped member disposed at a position overlapping with respect to the first plate-shaped member in the plate thickness direction, and disposed between the first plate-shaped member and the second plate-shaped member an intermediate member, a first heat insulating material disposed between the first plate-like member and the intermediate member, a second heat insulating material disposed between the second plate-like member and the intermediate member, and disposed so as to penetrate the first heat insulating material, the first plate-like member and the intermediate member Disclosed is a fire door comprising a first connecting member connecting the , and a second connecting member disposed to pass through the second heat insulating material and connecting the second plate-shaped member and the intermediate member.

The present inventor developed a fire door characterized in that an expanded graphite layer is formed between the inner surface of the outer plate and the insulating material and between the inner surface and the insulating material of the inner plate and was patented as Patent No. 2083790 (filed on May 18, 2018). The fire door of the above patent exhibits excellent thermal insulation and heat shielding effects by expanding the expanded graphite during a fire to form an air layer inside the fire door. However, if the fire continues and the temperature rises, and if the temperature is continuously maintained at 900°C or higher, the inner or outer plate of the heated fire door swells due to the expanded graphite layer, thus causing the fire door to be warped and deformed. became

The present inventors laminated a plurality of heat insulating sheets between the inner and outer plates to compensate for the drawbacks of the fire door of the above patent, and each of the heat insulating sheets is formed with a thin insulating film on both surfaces of the heat insulating material layer so that convection occurs within each sheet. Attached, and the plurality of laminated insulating sheets were developed as a fire door with a built-in heat insulating material combined with 4 to 12 spacing members and applied for Patent Application No. 2018-81591 (applied on July 13, 2018). However, the above patent application also did not completely solve the problem that the insulation structure is easily distorted, and as a result, the fire door is also easily deformed.

The present inventor has developed a new insulation structure for a fire door that is easy to manufacture and handle while satisfying the heat shielding performance, which is the essential function of a fire door, and applied for patent application No. 2019-152949 (filed on November 26, 2019). In this patent application, a plurality of skeletal supports are installed to form a lattice structure, and screws are fixed at the intersections of the skeletal supports to prevent twisting or bending of the fire door. The insulation structure of this patent application is a structure having sufficient strength so that there is no twisting or bending of the fire door, but due to the complicated structure, the problem of low productivity and an increase in manufacturing cost was derived.

As described above, the most important function of the fire door is the insulation and heat shielding function, and the next important function is that it must have sufficient strength so that there is no torsion or warpage.

The present inventors have come to develop an insulating structure for a fire door of the present invention using a fire resistant paint composition having excellent thermal insulation and heat shielding functions, and having sufficient strength so that there is no torsion or warpage.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a new insulation structure for a fire door for manufacturing a fire door that meets legal requirements as well as excellent heat and heat insulation performance and does not cause torsion or warpage.

Another object of the present invention is to provide an insulating structure for a fire door that is easy to manufacture and handle, and has excellent productivity and low manufacturing cost.

Another object of the present invention is to provide a fire door in which the heat insulating material structure built into the fire door can be stably fixed without being deflected downward by a load.

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

The insulation structure 100 for a fire door according to the present invention includes at least two laminated plate-shaped insulating materials 10 and a fire-resistant paint composition laminated one by one between the plate-shaped insulating materials 10 coated aluminum thin-film sheets 20 It is characterized in that it comprises a reinforcing structure 30 for reinforcing by combining the plate-shaped insulating material (10).

The plate-shaped insulating material 10 is in the form of a plate-shaped sheet having a thickness of 10 to 40 mm, glass fiber, mineral wool, ceramic wool, or a PET (polyester) non-woven sheet or PE (polyethylene) foam (form) This can be preferably used.

The aluminum thin film sheet 20 is coated with a fire resistant paint composition on one or both surfaces for non-combustible and heat-shielding performance. Preferably, the coating composition is applied to both surfaces of the aluminum thin sheet 20.

The fire resistant paint composition is a composition comprising 20 to 50 parts by weight of a silane compound, 20 to 100 parts by weight of expanded graphite, and 80 to 200 parts by weight of sugar, per 100 parts by weight of the aqueous binder resin solution. The binder resin aqueous solution is an aqueous solution in which a water-soluble resin is dissolved in water, and as the water-soluble resin, an acrylic resin, a vinyl acetate resin, a urethane resin, an epoxy resin, or the like may be preferably used. The silane composition is a composition in which 100 parts by weight of a silane compound is mixed with 0.1 to 2.0 parts by weight of acetic acid, hydrochloric acid or sulfuric acid. Expanded graphite expands 100 to 300 times when heated to 150° C. or higher and has a particle size of 60 to 300 mesh, and a carbon component of 95 wt % or more is preferably used. This fire resistant paint composition was developed by the present inventor and applied for a patent as Patent Application No. 2020-1339947 (filed on October 27, 2020).

The fire resistant paint composition may be applied to the surface of the plate-shaped insulating material 10 instead of being applied to the aluminum thin film sheet 20 .

In order to prevent twisting or bending of the fire door, the reinforcing structure 30 is used for the purpose of imparting strength to the insulating material structure 100 . The reinforcing structure 30 is a structure for reinforcing by bonding the plate-shaped insulating materials 10 stacked to each other.

The reinforcing structure 30 includes 2 to 5 vertical supports 31, 2 to 5 horizontal supports 32, and a z-axis support (height support) fixed vertically to the vertical support 31 at intervals of 15 to 30 cm. (33), and each support (31, 32, 33) is fixed to each other by welding.

A fire door is usually 1,000x2,100 mm in width and length, and since the insulation structure 100 is built inside the fire door, the horizontal support 32 has a length slightly smaller than 1,000 mm, and the vertical support 31 has a length It should be slightly smaller than 2,100mm. The z-axis support (height support) 33 should be equal to the inner width (thickness) of the fire door.

The z-axis support 33 makes both ends 34 stiff so that the portion in contact with the inner or outer plate of the fire door makes point contact, not surface contact. This is to minimize heat transfer in case of fire.

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

The present invention is to manufacture a fire door that meets legal requirements as well as excellent heat and heat insulation performance and does not cause torsion or warpage. It has the effect of the present invention to provide a fire door insulating material structure that can be stably fixed without deflecting the structure downward by a load, and a fire door manufactured using the same.

1 is a schematic perspective view showing a specific example of the insulation structure 100 for a fire door according to the present invention.
FIG. 2 is a schematic exploded perspective view of the insulation structure 100 of FIG. 1 .
3 is a schematic perspective view of a reinforcing structure 30 of the present invention.
4 is a schematic perspective view showing the end 34 of the z-axis support 33 .
5 is a schematic perspective view of the insulating material structure 100 of another embodiment composed of three sheet-shaped insulating materials (10a, 10b, 10c).
6 is a schematic perspective view of an insulating material structure 100 of another embodiment, which is composed of four plate-shaped insulating materials 10a, 10b, 10c, and 10d.

The present invention relates to a heat insulating material structure built in the inside of a fire door and a fire door having the heat insulating material structure built therein.

The insulation structure 100 for a fire door according to the present invention includes at least two laminated plate-shaped insulating materials 10 and a fire-resistant paint composition laminated one by one between the plate-shaped insulating materials 10 coated aluminum thin-film sheets 20 , and a reinforcing structure 30 for reinforcing by combining the plate-shaped insulating material 10 .

FIG. 1 shows one specific example of the insulation structure 100 for a fire door according to the present invention, and FIG. 2 is a schematic exploded perspective view of the insulation structure 100 of FIG. 1 .

1 shows an insulating material structure 100, two plate-shaped insulating materials 10a and 10b stacked up and down, an aluminum thin film sheet 20 inserted and stacked between the plate-shaped insulating materials 10a, 10b, and the plate-shaped insulating material 10a , 10b) consists of a reinforcing structure 30 for reinforcing by combining. A fire resistant paint composition is applied to one or both surfaces of the aluminum thin film sheet 20 .

The plate-shaped insulating material 10 is in the form of a plate-shaped sheet having a thickness of 10 to 40 mm, glass fiber, mineral wool, ceramic wool, or a PET (polyester) non-woven sheet or PE (polyethylene) foam (form) This can be preferably used. The plate-shaped insulating material 10 may be laminated with 2 to 10 sheets, but preferably 2 to 5 sheets. Since the thickness of the fire door is about 40 to 120 mm, considering the thickness of the plate-shaped insulating material 10, the number of laminated plate-shaped insulating materials 10 can be easily combined.

The aluminum thin film sheet 20 is coated with a fire resistant paint composition on one or both surfaces for non-combustible and heat-shielding performance. Preferably, the coating composition is applied to both surfaces of the aluminum thin sheet 20. The aluminum thin film sheet 20 is an aluminum foil having a thickness of 5 to 100 μm which is generally used.

The fire resistant paint composition is a composition comprising 20 to 50 parts by weight of a silane compound, 20 to 100 parts by weight of expanded graphite, and 80 to 200 parts by weight of sugar, per 100 parts by weight of the aqueous binder resin solution. The binder resin aqueous solution is an aqueous solution in which a water-soluble resin is dissolved in water, and as the water-soluble resin, an acrylic resin, a vinyl acetate resin, a urethane resin, an epoxy resin, or the like may be preferably used. In the aqueous binder resin solution, the resin component of the solid content is 20 to 50% by weight, and the remainder is the water component. The silane composition is a composition in which 100 parts by weight of a silane compound is mixed with 0.1 to 2.0 parts by weight of acetic acid, hydrochloric acid or sulfuric acid.

The silane compound acts as a gelling agent and an adhesive in the applied non-combustible coating film, and forms a graphite layer adhered to the substrate without scattering the expanded graphite by combining with the expanded graphite at a high temperature of 900° C. or higher.

Silane compounds include methyltrimethoxysilane (CH ₃ -Si-(OCH ₃ ) ₃ ), tetraethoxysilane (Si-(OC ₂ H ₅ ) ₄ ), glycidoxypropyltrimethoxysilane (CH ₂ (O) )CHCH ₂ OC ₃ H ₆ -Si-(OCH ₃ ) ₃ ), methacryloxypropyltrimethoxysilane (H ₂ C=CH(CH ₃ )C(O)OC ₃ H ₆ -Si-(OCH ₃ ) ₃ ), and vinyltrimethoxysilane (H ₂ C=CH-Si-(OCH ₃ ) ₃ ). Methyltrimethoxysilane (MTMS) can be preferably used. MTMS is commercially available as XIAMETER(R) OFS-6070 Silane from Dow Corning.

Expanded graphite expands 100 to 300 times when heated to 150° C. or higher and has a particle size of 60 to 300 mesh, and a carbon component of 95 wt % or more is preferably used. This fire resistant paint composition was developed by the present inventor and applied for a patent as Patent Application No. 2020-1339947 (filed on October 27, 2020).

Sugar firmly bonds the expanded graphite together with the silane compound to form a graphite layer that is adhered to the substrate without scattering, even in a fire of 900°C or higher. Because expanded graphite does not burn even at a temperature of 2,000℃ or higher, it has excellent insulation and heat dissipation effects.

The coating composition may be applied in a paste state using a brush or a roller. Water may be further added to the coating composition to adjust the viscosity, and the amount of added water is preferably 5 to 40 parts by weight per 100 parts by weight of the binder resin aqueous solution.

The fire resistant paint composition may be applied to the surface of the plate-shaped insulating material 10 instead of being applied to the aluminum thin film sheet 20 .

The fire resistant paint composition is applied 1 to 3 times on the surface of the aluminum thin film sheet 20 to form a 0.1 to 2.0 mm thick coating film. The expanded graphite contained in the coating film forms a graphite layer that is adhered to the substrate without scattering during or after combustion by chemical bonding with the binder resin, the silane compound, and sugar, thereby maximizing flame retardancy, heat shielding, and heat insulation effects.

In order to prevent twisting or bending of the fire door, the reinforcing structure 30 is used for the purpose of imparting strength to the insulating material structure 100 . The reinforcing structure 30 is a structure for reinforcing by bonding the plate-shaped insulating materials 10 stacked to each other.

3 is a schematic perspective view of a reinforcing structure 30 of the present invention. In the reinforcing structure 30 of FIG. 3, three vertical supports 31 and three horizontal supports 32 are fixed in a grid, and a z-axis support fixed vertically to the vertical support 31 at intervals of 15 to 30 cm ( height support) (33). The reinforcing structure 30 includes 2 to 5 vertical supports 31, 2 to 5 horizontal supports 32, and a z-axis support (height support) fixed vertically to the vertical support 31 at intervals of 15 to 30 cm. (33), and each support (31, 32, 33) is fixed to each other by welding. Each support 31 , 32 , 33 is a wire having a diameter of 2 to 4 mm. The z-axis support 33 is easily inserted into the plate-shaped insulating material 10 made of a non-woven fabric.

A fire door is usually 1,000x2,100 mm in width and length, and since the insulation structure 100 is built inside the fire door, the horizontal support 32 has a length slightly smaller than 1,000 mm, and the vertical support 31 has a length It should be slightly smaller than 2,100mm. The length (height) (h) of the z-axis support (height support) 33 must be equal to the inner width (thickness) of the fire door. Since the thickness of the fire door is about 40 to 120 mm, it should be equal to the inner width (thickness) in this range.

The vertical support 31 and the horizontal support 32 of the reinforcing structure 30 serve to prevent the insulation structure 100 from being bent or twisted, and a plurality of z-axis supports (height supports) 33 are the inner plates of the fire door. (not shown) and the outer plate (not shown) serve to prevent the fire door from being bent or twisted.

The z-axis support 33 makes both ends 34 stiff so that the portion in contact with the inner or outer plate of the fire door makes point contact, not surface contact. This is to minimize heat transfer in case of fire. 4 shows the end 34 of the z-axis support 33 .

5 is a schematic perspective view of the insulating material structure 100 of another embodiment composed of three plate-shaped insulating materials 10a, 10b, and 10c. In this embodiment, the reinforcing structure 30 is positioned between the plate-like insulation 10a, 10b. Of course, the reinforcing structure 30 may be located between the plate-shaped insulators 10b and 10c. In this case, the welding position of the z-axis support 33 of the reinforcing structure 30 must be changed, which can be easily performed by a person skilled in the art to which the present invention pertains.

6 is a schematic perspective view of the insulating material structure 100 of another embodiment, which is composed of four plate-shaped insulating materials 10a, 10b, 10c, and 10d. In this embodiment, the reinforcing structure 30 is positioned between the plate-shaped insulating materials 10b and 10c.

In the present invention, a commercially available plate-shaped insulating material can be purchased and used, and the aluminum thin film sheet 20 and the reinforcing structure 30 coated with the fire-resistance paint composition are fabricated, respectively, and then laminated and assembled. Therefore, the insulation structure of the present invention can be manufactured with excellent productivity and low manufacturing cost because it is easy to manufacture and handle. In addition, since the insulating material structure of the present invention is laminated by inserting the aluminum thin film sheet 20 coated with the fire resistant paint composition between the plate-shaped insulating materials 10, it satisfies excellent heat and heat insulation performance, and is laminated as a reinforcing structure 30 Since the plate-shaped insulator 10 and the inner and outer plates of the fire door are fixedly supported, a fire door that does not twist or bend can be manufactured.

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

100: insulation structure, 10: plate-shaped insulation, 20: aluminum thin sheet,
30: reinforcement structure, 33: z-axis support, 34: end (contact)

Claims (11)

At least two sheets of laminated plate-like (板狀) insulation (10);
an aluminum thin film sheet 20 coated with a fire resistant paint composition laminated one by one between the plate-shaped insulating materials 10; and
a reinforcing structure 30 assembled between the plate-shaped insulating material 10 and the aluminum thin film sheet 20 in order to reinforce the plate-shaped insulating material 10 by bonding;
Insulation structure 100 for a fire door, characterized in that it comprises a.
According to claim 1, wherein the plate-shaped insulating material (10) is in the form of a plate-shaped sheet having a thickness of 10 to 40 mm, glass fiber, mineral wool, ceramic wool, or PET (polyester) non-woven sheet, or PE ( Polyethylene) insulation structure 100 for a fire door, characterized in that the foam (form).
According to claim 1, wherein 2 to 10 sheets of the plate-shaped insulating material 10 are laminated, and between adjacent plate-shaped insulating materials, an aluminum thin film sheet 20 coated with a fire resistant paint composition is inserted and laminated, respectively. Insulation structure 100 for a fire door.
[4] The insulation structure (100) for a fire door according to claim 3, wherein the aluminum thin film sheet (20) is coated with a fire resistant paint composition on one or both surfaces for non-combustible and heat insulating performance.
5. The method of claim 4, wherein the fire resistant paint composition is a composition comprising 20 to 50 parts by weight of a silane compound, 20 to 100 parts by weight of expanded graphite, and 80 to 200 parts by weight of sugar per 100 parts by weight of the aqueous binder resin solution. Insulation structure 100 for a fire door.
According to claim 5, wherein the expanded graphite expands 100 to 300 times when heated to 150 ° C. or higher, and has a particle size of 60 to 300 mesh.
According to claim 4, wherein the reinforcing structure (30) is 2 to 5 vertical supports (31), 2 to 5 horizontal supports (32), and vertically fixed to the vertical supports (31) at intervals of 15 to 30 cm. It consists of a z-axis support (height support) (33), each support (31, 32, 33) is a fire door insulation structure (100), characterized in that fixed to each other by welding.

The fire door according to claim 7, wherein the z-axis support (height support) 33 is equal to the inner width (thickness) of the fire door, and both ends 34 of the z-axis support 33 form an inclined cross section. Insulation structure 100 for a fire door, characterized in that the portion in contact with the inner or outer plate is in point contact rather than surface contact.
According to claim 1, wherein the plate-shaped insulating material (10) is composed of three plate-shaped insulating material (10a, 10b, 10c), the reinforcing structure 30 is located between the plate-shaped insulating material (10a, 10b) Insulation structure (100) for a fire door, characterized in that.
According to claim 1, wherein the plate-shaped insulating material (10) is composed of four plate-shaped insulating material (10a, 10b, 10c, 10d), the reinforcing structure 30 is between the plate-shaped insulating material (10b, 10c) Insulation structure 100 for a fire door, characterized in that it is located.
A fire door characterized in that the insulation structure 100 according to any one of claims 1 to 10 is embedded therein.

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