KR20200107415A - Heat Insulating board for fire door with improved heat insulation property and heat block property and manufacturing method thereof and fire door using thereof - Google Patents

Abstract

The present invention relates to an insulation material for a fire door with excellent heat insulation and heat shielding properties, a manufacturing method thereof, and a fire door using the same. The present invention includes, between lower and upper covers woven of glass fibers, a core material in which fumed silica powder, expanded perlite powder, an opacifying agent, and inorganic fibers are mixed. According to the present invention, four corners where the lower and upper covers meet are sewn.

Description

[Heat Insulating board for fire door with improved heat insulation property and heat block property and manufacturing method thereof and fire door using thereof]

The present invention relates to a fire door insulation material and a method of manufacturing the same, and a fire door using the same, and more particularly, as an insulation material comprising fumed silica powder and expanded perlite powder, wherein the outer shell is sewn and quilted, and a method of manufacturing the same And it relates to a fire door using the same.

The main insulating material used in conventional fire doors is mineral wool. KS F 2268-1 (ISO 3008) is applied as a fireproof test method for fire doors. In this case, the heat shielding property is judged by the rising temperature on the back side based on the heating time, and the heating time standards are 30 minutes, 1 hour, 2 hours, 3 It's time. In the case of testing using mineral wool as an insulating material used for fire doors, there is a problem that it is difficult to satisfy the 30 minutes criteria for determining heat shielding properties.

Therefore, in order to satisfy the heat shielding criterion of 30 minutes or more, a technique of applying a high-density heat shielding board, for example, gypsum board, to the flame side is used, but this results in a reduction in the thickness of the insulation material applied to the fire door. Therefore, another problem arises in that the insulation property (increased heat transmission rate), which is the main role of the fire door, decreases.

Most of the inorganic materials used as heat insulators exhibit excellent heat insulation by giving a large specific surface area to the inside. In order to have a large specific surface area inside, it is preferable not to use a binder or to use a very small amount. This is because the particles having many pores inside have a large absorption of the binder, resulting in a small internal specific surface area. In addition, in the case of using a binder, since the thermal insulation performance is degraded due to heat transfer due to conduction of a contact point by the binder, it is more preferable not to use a binder to exhibit excellent thermal insulation properties.

From Korean Patent Application Publication No. 10-2010-0083543 "Method of manufacturing a highly flexible insulation material reinforced with non-woven fiber in silica aerogel, and an insulation material manufactured by the method", non-woven fabric with chemical fiber, carbon fiber, glass fiber, etc. A method of manufacturing a film in a state of being prepared, applying an organic adhesive to a nonwoven fabric film, adsorbing silica airgel thereon, laminating the thus prepared insulating material, and sewing it using a needle having a W shape is proposed. However, since a non-formulated organic adhesive is used, absorption of the organic adhesive into the silica aerogel is partially prevented, but the process is complicated, the manufacturing cost is high, and the bonding strength with the organic adhesive after manufacture is weak, resulting in a problem of dust generation.

The present invention has been conceived to solve the above problems, and provides an insulating material for fire doors capable of simultaneously exhibiting better thermal insulation and heat shielding properties than mineral wool. In particular, since no binder is used, the reduction of the internal specific surface area of the porous material is prevented. It is a problem to provide a fire door insulation material, a method of manufacturing the same, and a fire door using the same, which is capable of and has excellent formability and can reduce material cost and process cost by continuously performing the manufacturing process.

As a means for solving the aforementioned problems,

The insulating material for fire doors having excellent heat insulation and heat shielding properties of the present invention includes a core material in which fumed silica powder, expanded perlite powder, opacifying agent and inorganic fibers are mixed between the lower and upper shells woven of glass fibers, and the lower shell It is characterized in that the four corners where the and upper shell meet are sewn or overlocked.

In addition, the core material is characterized in that it contains 54 to 93% by weight of fumed silica powder and 0.5 to 37.4% by weight of expanded perlite powder, 1 to 5% by weight of opacifying agent, and 1 to 10% by weight of inorganic fibers based on the total weight of the core material.

In addition, the particle size of the expanded perlite powder is characterized in that 1 to 300㎛.

In addition, the thickness of the upper and lower shells is characterized in that 0.1 to 3 mm.

In addition, the opacifying agent is characterized in that silicon carbide, graphite, zirconia, zircon, alumina or titanium oxide.

In addition, the inorganic fiber is characterized in that it is glass fiber, basalt fiber, mineral wool, zirconium or ceramic fiber.

In addition, it is characterized in that quilting the upper and lower surfaces of the insulating material.

The method of manufacturing a fire door insulation material having excellent thermal insulation and heat shielding properties of the present invention includes: (1) forming a core material by mixing fumed silica powder, expanded perlite powder, opacifying agent, and inorganic fibers; (2) continuously supplying the lower shell; (3) continuously supplying the core material on the lower shell; (4) continuously supplying an upper shell on the core material; (5) stitching three sides of the lower and upper shells so that the lower and upper shells surround the core material; (6) continuously compressing and molding the core material; It characterized in that it comprises a.

In addition, the core material is characterized in that it contains 54 to 93% by weight of fumed silica powder and 0.5 to 37.4% by weight of expanded perlite powder, 1 to 5% by weight of opacifying agent, and 1 to 10% by weight of inorganic fibers based on the total weight of the core material.

In addition, the particle size of the expanded perlite powder is characterized in that 1 to 300㎛.

In addition, the thickness of the upper and lower shells is characterized in that 0.1 to 3mm.

In addition, the opacifying agent is characterized in that silicon carbide, graphite, zirconia, zircon, alumina or titanium oxide.

In addition, the inorganic fiber is characterized in that it is glass fiber, basalt fiber, mineral wool, zirconium or ceramic fiber.

In addition, after the step (6), quilting the upper and lower surfaces of the insulating material; characterized in that it further comprises.

The fire door of the present invention is characterized in that it comprises the heat insulating material.

The fire door of the present invention is characterized in that it comprises a heat insulating material according to the manufacturing method.

The heat insulating material for fire doors of the present invention is applied to fire doors and has an effect of satisfying the rising temperature range on the rear surface of the standard even with a heating time of 1 hour or more when performing a heat shielding test based on KS F 2268-1 (ISO 3008). At the same time, it is possible to secure higher insulation and heat shielding properties than fire doors using mineral wool or the like as a conventional heat insulating material.

The heat insulating material for fire doors of the present invention can impart a large specific surface area to the interior by not using a binder, and can secure excellent heat insulation and heat shielding properties.

In addition, the use of a continuous manufacturing method simplifies the process, reduces dust generation, and reduces manufacturing cost.

1 is a schematic diagram showing a positional relationship between a shell and a core material constituting the heat insulating material of the present invention.
Figure 2 is a schematic diagram showing that the lower and upper shells of the insulation of the present invention are sewn.
3 is a schematic diagram showing that the heat insulating material of the present invention is quilted.
Figure 4 is a schematic diagram showing a continuous method of manufacturing the heat insulating material of the present invention.

Hereinafter, the heat insulating material for fire doors having excellent heat insulation and heat shielding properties of the present invention and a method of manufacturing the same will be described in more detail.

The present invention includes a core material 20 in which fumed silica powder, expanded perlite powder, opacifying agent and inorganic fibers are mixed between the lower shell 10 and the upper shell 30 woven of glass fibers, and the lower shell and the upper shell It relates to an insulation material for fire doors having excellent thermal insulation and heat shielding properties, characterized in that four corners where the outer shell meets are sewn.

The present invention comprises the steps of (1) forming a core material by mixing fumed silica powder, expanded perlite powder, opacifying agent, and inorganic fibers;

(2) continuously supplying the lower shell;

(3) continuously supplying the core material on the lower shell;

(4) continuously supplying an upper shell on the core material;

(5) stitching the lower and upper shells so that the lower and upper shells surround the core material;

(6) continuously compressing and molding the result of step (5);

It relates to a method of manufacturing an insulating material for fire doors having excellent heat insulation and heat shielding properties, comprising a.

Referring to FIG. 1, the heat insulating material 100 for a fire door of the present invention includes a lower shell 10, a core material 20, and an upper shell 30. The core material 20 is included between the lower shell 10 and the upper shell 30.

In the method of manufacturing the heat insulating material for fire doors of the present invention, a core material is formed by mixing fumed silica powder, expanded perlite powder, opacifying agent, and inorganic fibers in step (1).

The core material 20 of the present invention may be made of an inorganic material having heat insulating properties, but is not limited thereto, but it is preferable to include fumed silica powder and expanded perlite powder, an opacifying agent, and inorganic fibers. The fumed silica powder and the expanded perlite powder are mixed, and the fumed silica powder and the expanded perlite powder are not simply combined with each other, but are mixed without agglomeration and layer separation. Expanded perlite has large particles, and fumed silica has small particles, and there is a difference in density of each other, so when simple mixing, aggregation or delamination occurs due to particle size and density rather than uniform distribution. However, in order to mix without agglomeration and layer separation as in the present invention, it is preferable to fragment the fumed silica powder and expanded perlite powder on a high-speed mixer, and to mix them on a high-speed mixer.

The opacifying agent is dispersed between the fumed silica powder and the expanded perlite powder, and serves to block radiant heat due to a high-temperature flame, that is, a flame generated during a heat shielding test.

Although not intended to be limited thereto as the opacifying agent, for example, silicon carbide, graphite, zirconia, zircon, alumina or titanium oxide may be used.

Inorganic fibers form a matrix structure between particles in the process of uniformly dispersing fumed silica and expanded perlite powder to improve thermal insulation performance.

The inorganic fibers are not limited thereto, but inorganic fibers such as glass fibers, basalt fibers, mineral wool, zirconium or ceramic fibers may be used.

In the present invention, since the expanded perlite is crushed to an appropriate size on a high-speed mixer and dispersed between the fumed silica, the expanded perlite powder has a structure that serves as a structural frame between the fumed silica powder. In more detail, the fumed silica has high moisture absorption in the atmosphere or is in the form of agglomerated form of tens of microns due to electrostatic attraction between particles, but the particles can be separated instantly by strong external force or pressure. By separating and dispersing the fumed silica into its original size instantly by the high rpm and power of the high-speed mixer, coating the expanded perlite particles so that fine particles of fumed silica adhere to the surface of the expanded perlite particles to eliminate the phase separation between the synthetic silica and the perlite particles. A structure in which fumed silica and expanded perlite are mixed can be formed.

At this time, the speed of the high-speed mixer is 1000 rpm or more, particularly preferably 2000 rpm or more. When the speed of the mixer is less than 1000 rpm, the fumed silica powder and the expanded perlite powder are not uniformly mixed, only simple dispersion occurs, agglomeration or layer separation occurs, the expanded perlite powder particles are not fragmented, and the expanded perlite powder has a large particle size. There is a problem in that the heat insulating property is deteriorated due to the presence of powder.

The mixer is not limited in its type, shape, or structure, but when mixing, spherical and polycircular (porous) perlites are pulverized to form fragmented particles, and the fine particles of fumed silica separated between particles are expanded into fragments. It is preferable to use a mixer having a high rpm and a force so as to be coated on the surface of the perlite particles or dispersed and mixed.

For more efficient and effective mixing, the blade blade can be installed in the mixer, or the blade blade can be mounted on the upper, lower, left, right axis, and the blade blade and container are designed to rotate against gravity. You can also use it. Blade blades can be straight or cross-shaped, and round and multi-mounted blades can be used.

The fumed silica powder separated through a high-speed mixer has a particle size of several nanometers to tens of micrometers.

The fumed silica may be prepared by an appropriate method among methods known in the art, for example, by reacting silicon tetrachloride, oxygen, and hydrogen at a temperature close to 1000° C., high-purity fumed silica may be prepared with hydrogen chloride.

The fumed silica powder has properties that can impart hydrophilicity and hydrophobicity depending on the treatment method in the process. Since the thermal conductivity of water is high, approximately 0.6W/mK, the thermal conductivity of the thermal insulation material increases rapidly due to an increase in convection, etc. when moisture absorption or moisture absorption occurs, and the thermal insulation performance decreases. Therefore, the heat insulating material is required to have hydrophobicity, and it is possible to use a method of hydrophobic treatment by performing a hydrophobic treatment on the fumed silica particles to form a molded body, or by molding a mixture of fumed silica particles and a hydrophobic treatment agent to form a molded body. In addition, it is possible to secure hydrophobicity by mixing fumed silica and hydrophilic fumed silica and compressing the hydrophobic fumed silica to protect the hydrophilic fumed silica. In the present invention, in order to prevent the reduction of the specific surface area of the fumed silica, it is preferable to use a simple mixture of hydrophobic-treated fumed silica and general fumed silica. This is because the use of a hydrophobic treatment agent results in a reduction in specific surface area similar to using a binder.

The expanded perlite powder fragmented through a high-speed mixer has a particle size of 1 to 300 µm, and preferably 1 to 100 µm. If it is less than 1㎛, the thermal conductivity increases as the fragmented fine powder becomes excessive, and if it exceeds 300㎛, the structural strength of the fragmented expanded perlite is low, reducing the compressive strength of the heat insulating material.

The expanded perlite refers to a material manufactured by drying and then expanding the perlite ore, and the perlite ore is at least one selected from perlite, obsidian, pineal, and pumice. The shape of the expanded perlite particles is characterized by the size and distribution of the particles before expansion and the amount of crystallized water according to drying, and the expanded perlite has a large specific surface area because it is composed of countless cells inside the particles. Due to its low specific gravity, it has suitable conditions as an insulating material.

The core material 20 of the present invention is characterized in that no binder is used. In the conventional heat insulating material using synthetic silica, etc., a binder is used or reinforcing fibers are used in excess to secure formability. Alternatively, both are used to determine the appropriate amount. However, when a binder is used, the specific surface area formed inside the insulation material decreases, resulting in a decrease in thermal insulation performance.If the amount of reinforcing fiber is increased to reduce the amount of binder used, fiber agglomeration, dispersibility decrease, and resilience after molding are also increased. This deterioration occurs. In the present invention, by not using a binder, it is possible to prevent a problem of a decrease in thermal insulation performance due to heat transfer due to contact conduction by a binder, and a reduction in the internal specific surface area of the core material. In the present invention, even if a binder is not used, since the expanded perlite forms a structural frame by mixing the fumed silica powder and the expanded perlite powder through a high-speed mixer, the molding strength is superior to that of a molded body composed of only fumed silica powder particles having fluidity.

It is preferable that the fumed silica powder of the present invention contains 54 to 93% by weight based on the total weight of the core material. If it is less than 54% by weight, a problem occurs in that the thermal conductivity increases, and if it is more than 93% by weight, the strength of the product decreases, and the time required for compression molding increases.

It is preferable that the expanded perlite powder of the present invention contains 0.5 to 37.4% by weight, based on the total weight of the core material. When the content is less than 0.5% by weight, the material cost of the core material increases and the strength of the product decreases. When the content is more than 37.4% by weight, the thermal conductivity increases.

In the method of manufacturing the insulation for fire doors of the present invention, the lower shell 10 is continuously supplied in step (2). In step (3), the core material 20 is continuously supplied over the lower shell 10, and in step (4), the upper shell 30 is continuously supplied over the core material 20.

It is preferable that the lower shell 10 and the upper shell 30 of the present invention are inorganic fibers. As the inorganic fiber, glass fiber, zirconium, basalt, ceramic fiber, and the like may be used, and preferably glass fiber may be used. However, in the present invention, when using organic fibers, it is preferable not to use organic fibers because there is a risk of flames being generated due to organic fibers, which are combustible materials, during heat shielding tests and fire resistance tests.

It is preferable to use the lower shell 10 or the upper shell 30 of the present invention with a thickness of about 0.1mm to 3mm, and if it is thinner than 0.1mm, it is difficult to act as a shell, and if it exceeds 3mm, thermal efficiency due to the shell Since this deterioration problem occurs, it is preferable to apply it in the above range.

In the method of manufacturing the insulation for fire doors of the present invention, in step (5), three sides of the lower shell and the upper shell are sewn so that the lower shell 10 and the upper shell 30 surround the core material 20.

The lower shell 10 and the upper shell 20 of the present invention have four corners that meet while surrounding the core material, and at this time, the four corners are sewn or overlocked in the form of sewing through a sewing machine, etc. to make the insulation 100 To manufacture.

In the method of manufacturing the insulation for fire doors of the present invention, in step (6), the core material inside the insulation material having a lockstitch or overlocked outer shell is continuously compressed and molded to manufacture a heat insulation material. The compression molding machine can be selectively used among belt presses, roll presses, and plate presses, but is not limited thereto. The core material is prevented from leaking or loss due to the sealing of the outer shell, and compression is easy because the internal gas escapes through the outer shell.

Before performing this, a planarization process may be additionally performed so that the height is uniform. The reason for flattening is to prevent the phenomenon of being pulled to one side during compression molding.

Insulation materials with a sewn or overlocked outer skin may be quilted to penetrate the top and bottom surfaces. When quilting is performed, the effect of preventing the damage of the insulation material, damage caused by external shock, and vibration during installation while the insulation material is vertically installed inside the fire door is prevented. The interval between stitching of quilting is appropriate in the range of 1 inch to 4 inches, and if it is less than 1 inch, there is a risk that the insulation performance is reduced due to the density of the grid structure, and if it is more than 4 inches, it is difficult to exhibit the effect of preventing external impact.

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The present invention relates to a fire door comprising the insulating material 100 or the insulating material according to the manufacturing method.

The fire door of the present invention includes an upper iron plate, a lower iron plate, and an insulating material of the present invention. An inner frame for preventing bending is installed on the lower iron plate, and a spacer is attached. The spacer is for preventing thermal bridges when assembling the upper and lower steel plates. After the adhesive is applied to the lower steel plate, the insulation material 100 of the present invention is attached to the lower steel plate. After applying the adhesive to the upper portion of the insulating material 100, the upper iron plate is covered and assembled with the lower iron plate. The fire door is manufactured by putting this into a heating press and fixing the adhesive through thermoforming. The fire door is completed by installing a hinge, a fire pin and a door handle on the fire door. Furthermore, the fire door should eventually be combined with the door frame, and when it is combined with the door frame, there should be no gaps between the fire door and the door frame, so an airtight packing is installed on the door frame, and the final fire door and door frame set are combined with the fire door and the door frame. You can also complete it. The fire door of the present invention has very excellent heat insulation and heat shielding properties.

Hereinafter, the present invention will be described in detail through specific examples and comparative examples, and these examples are for illustrative purposes only and should not be construed as limiting the scope of the present invention.

In the following examples, the method of manufacturing the heat insulating material was the same, and the composition of the material and the thickness of the shell material were changed. The manufacturing method was prepared by mixing fumed silica powder, expanded perlite powder, opacifying agent, and inorganic fibers, laminating the lower shell, the insulating core material, and the upper shell and finishing the exterior, and quilting the upper and lower surfaces in a grid shape. In this case, the total thickness is 15mm, and the corresponding insulation is fixed inside the lower steel plate of the fire door with a total thickness of 50mm, and 35mm mineral wool insulation is fixed on the upper part, and the upper steel plate is assembled and manufactured. It was prepared by fixing.

The following examples and comparative examples are described.

Example One

By mixing 93% by weight of fumed silica powder, 0.5% by weight of expanded perlite powder, 1.5% by weight of opacifying agent powder, and 5% by weight of inorganic fibers, the upper and lower skins were finished using an outer skin material having a thickness of 0.1 mm, respectively. A grid quilted insulation was manufactured and applied to the fire door.

Example 2

56.1% by weight of fumed silica powder, 37.4% by weight of expanded perlite powder, 1.5% by weight of opacifying agent powder, and 5% by weight of inorganic fibers were mixed to finish using an outer shell material having an upper and lower shell thickness of 0.1 mm, respectively, and the upper and lower surfaces A grid quilted insulation was manufactured and applied to the fire door.

Example 3

81% by weight of fumed silica powder, 9% by weight of expanded perlite powder, 5% by weight of opacifying agent powder, and 5% by weight of inorganic fibers were mixed to finish using an outer shell material having an upper and lower shell thickness of 0.1 mm, respectively, and the upper and lower surfaces A grid quilted insulation was manufactured and applied to the fire door.

Example 4

63% by weight of fumed silica powder, 27% by weight of expanded perlite powder, 5% by weight of opacifying agent powder, and 5% by weight of inorganic fiber were mixed to finish using an outer shell material having an upper and lower shell thickness of 0.1 mm, respectively, and the upper and lower surfaces A grid quilted insulation was manufactured and applied to the fire door.

Example 5

54% by weight of fumed silica powder, 36% by weight of expanded perlite powder, 5% by weight of opacifying agent powder, and 5% by weight of inorganic fibers are mixed to finish using an outer shell material having an upper and lower shell thickness of 0.1 mm, respectively, and the upper and lower surfaces A grid quilted insulation was manufactured and applied to the fire door.

Comparative example One

54% by weight of fumed silica powder, 36% by weight of expanded perlite powder, 5% by weight of opacifying agent powder, and 5% by weight of inorganic fibers were mixed to finish using an outer shell material having an upper and lower outer skin thickness of 3 mm, respectively, and the upper and lower surfaces were A grid quilted insulation was manufactured and applied to the fire door.

Comparative example 2

50% by weight of fumed silica powder, 40% by weight of expanded perlite powder, 5% by weight of opacifying agent powder, and 5% by weight of inorganic fibers are mixed to finish using an outer shell material having an upper and lower shell thickness of 0.1 mm, respectively. A grid quilted insulation was manufactured and applied to the fire door.

Comparative example 3

Mixing 93.5% by weight of fumed silica powder, 1.5% by weight of opacifying agent powder, and 5% by weight of inorganic fibers, finishing with a cover material having an upper and lower skin thickness of 0.1mm each, and preparing an insulating material with lattice quilted upper and lower surfaces And applied it to the fire door.

Comparative example 4

Mixing 86% by weight of fumed silica powder, 9% by weight of expanded perlite powder, and 5% by weight of inorganic fibers, finishing with a cover material having an upper and lower skin thickness of 0.1 mm, respectively, and preparing an insulating material with lattice quilted upper and lower surfaces And applied it to the fire door.

Comparative example 5

89.5% by weight of fumed silica powder, 9% by weight of expanded perlite powder, and 1.5% by weight of opacifying agent powder were mixed, and the upper and lower outer skins were each 0.1mm thick to finish using an insulator, and the upper and lower surfaces were lattice-quilted. It was manufactured and applied to the fire door.

The method of measuring the compressive strength, thermal conductivity, heat shielding property, and heat penetration rate for the fire door insulation material of the present invention is as follows.

1) upper and lower Sheath material When 10% of the insulation material is deformed, the compressive strength ( kPa )

The applicable standard is ASTM C 165, and the compressive strength at the time of deformation by 10% of the thickness compared to the initial thickness was measured.

2) upper and lower Sheath material Intrinsic thermal conductivity of the insulating material (W/ mK )

The applicable standard is ISO 8301, and after inserting the test body between the heating plate and the cooling plate, the thermal conductivity of the test body was measured using the temperature difference between the heating plate and the cooling plate.

3) Inquiries applied with the corresponding insulation Heat shielding (minute)

The applicable standard is ISO 3008, and each set of doors is pushed and pulled to expose different sides to the heating furnace, and measured based on the maximum temperature of five thermocouples in the center under the temperature rise conditions specified in the standard.

4) Inquiry to which the corresponding insulation is applied Heat transmission rate (W/ ㎡K )

The heat transmittance rate test standard was measured by the method of KS F 2278.

The physical properties of the insulating material for fire doors prepared according to the Examples and Comparative Examples are shown in Table 1 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Fumed silica
(weight%) 93 56.1 81 63 54 54 50 93.5 86 89.5 Expander light
(weight%) 0.5 37.4 9 27 36 36 40 0 9 9 Opacifying agent
(weight%) 1.5 1.5 5 5 5 5 5 1.5 0 1.5 Inorganic fiber
(weight%) 5 5 5 5 5 5 5 5 5 0 Skin thickness
(mm) 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 Compressive strength
(kPa) 58 62 97 71 56 55 44 48 48 35 Thermal conductivity
(W/mK) 0.021 0.023 0.021 0.022 0.023 0.027 0.025 0.022 0.028 0.024 Heat shielding
(minute) 68 64 72 67 68 49 52 62 53 64 Heat transmission rate
(Wm ² /K) 1.22 1.31 1.19 1.29 1.26 1.44 1.42 1.34 1.41 1.31

In the results of Examples 1 to 5, 0.5 to 36% by weight of expanded perlite powder and 1.5 to 5% by weight of opacifying agent powder and 5% by weight of glass fiber were mixed in the range of 93 to 54% by weight of fumed silica powder. The result was a strength of 50 kPa or more, which is an easy compressive strength, and a low thermal conductivity in the range of 0.021 to 0.023 W/mK, and a heat shielding performance of more than 60 minutes, and a thermal insulation performance of less than 1.4 W/m 2 K, based on the heat transmission rate, was obtained.

On the other hand, in Comparative Example 2 in which the fumed silica powder is less than 50% by weight and the expanded perlite powder is 40% by weight or more, it can be seen that the inherent thermal conductivity, heat shielding property, and heat transmission rate did not secure performance above the standard value. In Comparative Example 3 in which was not mixed, the thermal insulation performance was good, but it was confirmed that the compressive strength was below the standard value.

In addition, through Comparative Example 1 using a thickness of 3 mm or more as the shell material, as the shell material occupies a large portion of the total heat insulating material thickness, it can be seen that the insulation performance and heat shielding property are reduced, and the opacifying agent powder is less than 1.5% by weight. It can be seen from Comparative Example 4 that the thermal insulation performance and heat shielding property are rapidly reduced, and in Comparative Example 5 where the glass fiber is not included, the compressive strength is less than the standard value because structural reinforcement by the glass fiber, which is a reinforcing fiber, is not performed after compression molding It can be seen that it appears at the level of.

10: lower shell
20: heartwood
30: upper sheath
100: insulation

Claims (18)

Including a core material mixed with fumed silica powder, expanded perlite powder, opacifier and inorganic fibers between the lower and upper shells woven of glass fibers, and sewing or overlocking four corners where the lower and upper shells meet. Insulation for fire doors excellent in heat insulation and heat shield, characterized in that. The method of claim 1, wherein the core material comprises 54 to 93% by weight of fumed silica powder and 0.5 to 37.4% by weight of expanded perlite powder, 1 to 5% by weight of opacifying agent, and 1 to 10% by weight of inorganic fibers based on the total weight of the core material. Insulation for fire doors with excellent thermal insulation and heat shielding properties. The insulating material for fire doors according to claim 1, wherein the expanded perlite powder has a particle size of 1 to 300 μm. The insulating material for fire doors according to claim 1, wherein the upper and lower shells have a thickness of 0.1 to 3 mm. The insulating material for fire doors according to claim 1, wherein the opacifying agent is silicon carbide, graphite, zirconia, zircon, alumina, or titanium oxide. The insulating material for fire doors according to claim 1, wherein the inorganic fiber is glass fiber, basalt fiber, mineral wool, zirconium, or ceramic fiber. The heat insulating material for fire doors according to any one of claims 1 to 6, wherein the upper and lower surfaces of the insulating material are quilted. (1) forming a core material by mixing fumed silica powder, expanded perlite powder, opacifying agent, and inorganic fibers;
(2) continuously supplying the lower shell;
(3) continuously supplying the core material on the lower shell;
(4) continuously supplying an upper shell on the core material;
(5) stitching three sides of the lower and upper shells so that the lower and upper shells surround the core material;
(6) continuously compressing and molding the core material;
A method of manufacturing a fire door insulating material having excellent heat insulation and heat shielding properties, comprising a. The method of claim 8, wherein the core material comprises 54 to 93% by weight of fumed silica powder and 0.5 to 37.4% by weight of expanded perlite powder, 1 to 5% by weight of opacifying agent, and 1 to 10% by weight of inorganic fibers based on the total weight of the core material. A method of manufacturing a fire door insulation material having excellent thermal insulation and heat shielding properties. The method of claim 8, wherein the expanded perlite powder has a particle size of 1 to 300 μm. 9. The method of claim 8, wherein the thickness of the upper and lower shells is 0.1 to 3mm. The method of claim 8, wherein the opacifying agent is silicon carbide, graphite, zirconia, zircon, alumina, or titanium oxide. The method of claim 8, wherein the inorganic fiber is glass fiber, basalt fiber, mineral wool, zirconium or ceramic fiber. According to any one of claims 8 to 13, After the step (6), quilting the upper and lower surfaces of the insulating material; of the fire door insulating material having excellent heat insulation and heat shielding properties, characterized in that it further comprises Manufacturing method. A fire door comprising the heat insulating material according to any one of claims 1 to 6. A fire door comprising the heat insulating material according to claim 7. A fire door comprising a heat insulating material manufactured by the manufacturing method according to any one of claims 8 to 13. A fire door comprising an insulating material manufactured by the manufacturing method according to claim 14.

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