KR20170127125A - The manufacturing method of eco-friendly nonflammable lightweight heat insulating materials used ceramic-fiber and water-glass for fire prevention, and therefor eco-friendly nonflammable lightweight heat insulating materials - Google Patents

Abstract

An environmentally friendly lightweight fire retardant insulation material using a ceramic fiber and water glass, according to the present invention, is an insulation material, which is obtained by the following steps: mixing 80 to 120 vol% of water glass with 100 vol% of the ceramic fiber to be deposited; drying the deposited mixture at the temperature of 70-80C for 48-72 hours; and foaming the mixture at the temperature of 200 to 250C for 3 to 5 minutes by irradiating the dried mixture with microwave. Accordingly, the present invention provides the fire retardant insulation material which has improved heat insulation performance for fire prevention and fire retardant performance compared to conventional insulation materials, and which is environmentally friendly, lightweight, and economically-improved extraordinarily.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eco-friendly lightweight fireproof insulation material for fire protection using a ceramic fiber and water glass, and an eco-friendly lightweight fire- NONFLAMMABLE LIGHTWEIGHT HEAT INSULATING MATERIALS}

More particularly, the present invention relates to a method for manufacturing an environmentally friendly lightweight porous fireproof insulation material for fire protection using ceramic fiber and water glass, and an eco-friendly lightweight porous fireproof insulation material for fire protection.

Fire doors used in various buildings and apartments are made up of fireproof structure and core materials, and standardized and legislated with high grade fireproof doors and double fire doors. The existing certification standard is standardized by the center of the thickness of the steel plate applied to the fire door, and the safety performance standard of the insulation which is the core which enters the inside of the fire door has not been stipulated strictly.

Due to the inadequacy of safety standards for such fireproof doors, it has become a reality that fire hatches, which are made of paper honeycomb, glass fiber and foamed polyurethane composite material, and even styrofoam core materials, have been produced and supplied in the market. The fireproof door core materials are vulnerable to fire, poisonous gas is generated, and the fireproof door product, whose heat shield performance is not satisfactory, has been installed and it has become a social issue. However, since the core material is embedded in the fire door, it is difficult to detect and confirm with the naked eye when the construction is completed, and a serious problem occurs when a fire occurs.

On the other hand, when insulating materials using inorganic materials are used as core materials for fire doors, they are strong against fire, but they are very expensive and heavy, and they have not been widely spread and avoided in the industry. An example of a method for manufacturing a heat insulating material using such a ceramic-based inorganic material is described in Patent Document 1 below. Insulation materials using conventional inorganic materials usually produce insulation materials (melting, foaming, and firing) at a high temperature of 1100 to 1300 ° C, and it is practically difficult to reduce the temperature to as low as 750 ° C or less even if the temperature is as low as possible. Therefore, the existing inorganic material heat insulation material is excellent in the performance of the fire-retardant insulation material, but has a problem that it is used only for the high-grade insulation material product because the cost of normal energy input is large.

 In order to solve all of the above problems, a method of directly employing a ceramic fiber such as a glass fiber or a mineral fiber, which is relatively inexpensive for a fireproof door core, has been introduced. However, since such a ceramic fiber usually looks like a cotton pad and breaks when it is pressed, the needle-like sharp powder is blown off in the air. Therefore, not only is the working efficiency of the manufacturing and installation work of the fireproof door very low, Which seriously threatened the health of the workers, and also caused environmental problems when they were dismantled. Therefore, a method of directly employing the ceramic fiber as a core for fireproofing is still in the industry.

In the meantime, as the government's safety standard for fire doors has been strengthened and implemented in July 2015, it is expected that: 1) it will be safe for fire (to enhance fire-fighting and thermal insulation performance), 2) And 4) the necessity to develop and supply environmentally friendly lightweight fire retardant insulation materials (such as fireproof doors or sandwich panels), which are both cheaper and cheaper, as well as economic efficiency, have been urgently needed in the industry.

To this end, the development of inorganic material insulation materials which are 1) strong against fire (heat resistance), 2) excellent in heat insulation, 3) lightweight, 4) excellent in environmental friendliness, and 5) However, it is difficult to commercialize a heat insulating material satisfying the above-mentioned conditions at the same time with a known method of manufacturing an inorganic insulating material.

KR 101328187 B1

It is an object of the present invention to solve all of the problems described above. It is an object of the present invention to provide a ceramic fiber and a water glass which are excellent in heat resistance and heat insulation, and are lightweight , 3) environmentally friendly, and 4) a method for manufacturing an eco-friendly lightweight heat-insulated material for fire protection, wherein the cost of energy input is much lower than that of conventional methods and the manufacturing process is simplified, thereby remarkably improving the economical efficiency.

Another object of the present invention to solve all of the above problems is to provide an eco-friendly lightweight heat-insulating material for fire prevention manufactured by the above-described manufacturing method.

In order to achieve the above object, the present invention provides a method of manufacturing an eco-friendly lightweight heat-insulating material for fire protection according to the present invention, which comprises the steps of mixing 80 vol% of water glass with 100 vol% of ceramic fiber, deposition; A second step of drying the immersed mixture at 70 to 80 DEG C for 48 to 72 hours; And a third step of irradiating the dried mixture with microwaves and foaming at 200 to 250 ° C for 3 to 5 minutes to produce a heat insulating material.

According to another aspect of the present invention, there is provided an eco-friendly lightweight heat-insulating material for fire protection according to the present invention, which comprises the steps of: mixing 80 vol% of water glass with 100 vol% of ceramic fiber, Drying the immersed mixture at 70 to 80 ° C for 48 to 72 hours, irradiating microwave to the dried mixture, and foaming at 200 to 250 ° C for 3 to 5 minutes.

It is preferable that the heat insulating material is further cut into a predetermined size of a heat insulating material so as to be made of a core material for a fire door or a sandwich panel.

The term " ceramic fiber " in the present invention is defined as ceramic fibers including ordinary glass fibers, glass wool, mineral wool, and ceramics.

The heat-resistant insulation material according to the present invention is capable of foaming the insulation material at a relatively low temperature of 200 to 250 ° C in comparison with the conventional method of manufacturing the inorganic material insulation material through the melting or sintering foaming process at a high temperature of 1100 to 1300 ° C, Significantly lowering the cost of energy input on the process, and simplifying the process, thus significantly reducing the manufacturing cost.

Further, the heat-insulating material according to the present invention is light and environmentally friendly (no toxic gas or scattering powder is generated at all) and is easy to post-process with a plate material (improvement in handling and handling), and is widely used as a core material for various heat insulating partitions, sandwich panels, Provides useful features.

Furthermore, since the heat-insulating material according to the present invention has a plurality of nano-sized pores formed uniformly in the heat insulating material (plate material), the heat resistance and the heat insulating property of the heat-insulating material are improved compared with the conventional ones.

Accordingly, the present invention provides an eco-friendly lightweight heat-insulated material for fire protection which simultaneously achieves performance improvement, environment friendliness, and economy as compared with the prior art.

FIG. 1 is a photograph of a ceramic fiber cut into a suitable size according to a preferred embodiment of the present invention,
FIG. 2 is a photograph of a state in which ceramic fibers cut in FIG. 1 are placed in a predetermined container and water glass is poured (mixed) in accordance with a preferred embodiment of the present invention,
FIG. 3 is a photograph of a state in which the mixture deposited in FIG. 2 is put in a predetermined dryer and dried in accordance with a preferred embodiment of the present invention,
FIG. 4 is a photograph of a prototype of an eco-friendly porous lightweight fire retardant insulation material for fireproofed by microwave irradiation in a predetermined microwave oven in FIG. 3 according to a preferred embodiment of the present invention,
5 is a photograph of a plate-shaped prototype of an eco-friendly porous lightweight incombustible monolithic insulation material for fire prevention, which is obtained by cutting the eco-friendly porous light-weighted fire retardant insulation material for fireproofing according to a preferred embodiment of the present invention .

Hereinafter, a method for manufacturing an environmentally friendly lightweight fireproof insulation material according to a preferred embodiment of the present invention and an environmentally friendly lightweight fireproof insulation material manufactured thereby will be described in detail with reference to the accompanying drawings.

A method of manufacturing an environmentally friendly lightweight fireproof thermal insulation material according to a preferred embodiment of the present invention is characterized in that a ceramic fiber, which is a heat insulating material sold at a relatively low price in the market, In one embodiment, as shown in FIG. 1, the substrate is cut into a size of 300 mm x 300 mm long and then placed in a container made of an appropriate material such as acrylic. Then, as shown in Fig. 2, 80 to 120 vol% is poured into the ceramic fiber to deposit water glass.

When the water glass capacity is deposited at a volume ratio of less than 80 vol% of the glass fiber relative to 100 vol% of the ceramic fiber, a part of the fibrous form of the ceramic fiber itself remains in the fireproof thermal insulation material to be produced.

On the other hand, when the water glass capacity is deposited at a volume ratio exceeding 120 vol% of the glass fiber with respect to 100 vol% of the ceramic fiber, as a result of the experiment, it has been found that the heat insulation plate having the weak strength, Is generated.

In the second step, the ceramic fiber in which the water glass is evenly deposited in the first step is placed in a drier together with the container and dried for at least 48 hours to a maximum of 72 hours, and the drying temperature is preferably maintained at 70 to 80 ° C . A photograph of the resultant dried according to the second step is shown in FIG.

Here, when drying at a high temperature exceeding 80 캜 at the time of drying, a phenomenon that water glass deposited on the ceramic fiber boils up occurs, so that the size and distribution of bubbles formed at the time of foaming are not maintained uniformly, The results of the experiment were revealed. In addition, when dried at a low temperature of less than 70 ° C during drying, the drying time is required for a long time, resulting in lowering process efficiency and increasing the total energy input cost.

Here, the specifications of the dryer used in the second embodiment of the present invention are the dimensions of 2,100 mm (H) X 800 mm (W) X 750 mm (D) And the rated output is 2 kW (two 1 kW X ceramic heaters). However, the present invention is not limited to this, It will be understood by those skilled in the art that the dryer can be employed if the dryer is a dryer capable of drying for 48 to 72 hours at the drying temperature of 70 to 80 ° C.

In the third step, the ceramic fiber in which the water glass is immersed and dried in the first and second steps is taken out of the vessel and placed in a microwave oven. When the microwave is irradiated, the ceramic fiber is gradually heated to start foaming, When the volume of the initial ceramic fiber used in the first step is about 3 to 4 times larger than the volume of the initial ceramic fiber, the foaming is completed, so that the environmentally friendly porous lightweight fire resistant insulation material for fire protection according to the present invention is produced as shown in FIG.

Here, the foaming conditions using the microwave are preferably performed at a temperature of 200 to 250 ° C. for 3 to 5 minutes, and it has been found from experiments of various conditions. At this time, if the heating is continued, the foaming may be further advanced in a part of the material. However, care must be taken as the heating temperature rapidly increases, and a part of the material deteriorates and the material melts.

Meanwhile, the microwave oven used in the third step has an outer shape of 1,600 mm (H) x 1,400 mm (W) x 1,400 mm (D) and its inner shape is 1,200 mm (H) (Microwave oven) having a size of X 600 mm (D) and a rated output of 6 kW (five 1.2 kW X magnetrons) and capable of controlling the operation time, the present invention is not limited thereto, It will be appreciated by those skilled in the art that a microwave oven can be employed that is capable of foaming at < RTI ID = 0.0 > 250 C < / RTI > for 3 to 5 minutes.

In the fourth step, a plate material normalization process for further cutting the fire-extinguishing material of the present invention completed in the third step with a plate material of a predetermined size may be required, and the prototype of the cut- . This is a post-treatment process performed because the shape of the fire-proof thermal insulation material that has been foamed in the third step is not uniform. In particular, in the case where the first to third process conditions are satisfied, the flame-retardant thermal insulation material of the present invention, which has been foamed in the third step, has no fibrous structure, so that the flour is not scattered into the air, Or for sandwich panels), it is very eco-friendly compared to conventional ones, and its operation convenience has been greatly improved.

In particular, in the first step, mineral wool having a thickness of 12.5 mm was used as an initial ceramic fiber, and 107 vol% of water glass was immersed therein, In the second step, it was dried in the dryer for 72 hours, and in the third step, the microwave was irradiated for 5 minutes in the microwave open to foam. As a result, the fire-proofed insulation material of the present invention, which has been foamed, is made of a porous heat insulating material whose volume is about 3.5 times larger than that of the initial ceramic fiber. In the fourth step, it is cut into a plate material of 30 mm in thickness and 300 mm in size and 300 mm in size, Thereby producing a prototype of an environmentally friendly lightweight porous incombustible thermal insulation material for fire protection according to the invention.

The method for manufacturing an eco-friendly lightweight heat-insulating material for fire protection according to the present invention and the heat-insulating material according to the present invention appear to be a simple process in which water glass is adequately immersed in a ceramic fiber, followed by drying and then foaming by irradiating microwaves. However, The optimum composition and ratio of the composition and the ratio of the composition that achieved both excellent heat resistance performance / insulation performance / environment friendliness / ease of handling / simple process / economical efficiency compared with the conventional one after the control repeated test according to each condition It is obvious to those skilled in the art that the conditions are found.

A comparison table of the main features of the present invention and the existing control group is as follows.

First, the results of comparing the features of the present invention with those of the conventional inorganic material insulating material are shown in Table 1 below.

Compare Existing insulator Invention of the present invention Manufacturing method After molding, it is melted or fired at a temperature of about 1000 ° C or so,
(Large equipment for melting / firing is required) After water glass is immersed in the ceramic fiber, the microwave is irradiated after drying, and the heated foaming
(Small facility / simple process) (improvement) Manufacturing process temperature 750 ~ 1300 ℃ 250 ℃ or less (improved) Presence or absence of carbon dioxide In the manufacturing process,
Mass production None at all (improvement) Insulation properties (W / m.k) (thermal conductivity) 0.03 to 0.1 0.027 ~ 0.035 (improvement) Product mass Depending on the kind of inorganic material composition and its manufacturing method - About 120% of Styrofoam
- Compared to conventional insulator
About 1/2 ~ 1/10 weight (improved)

As can be seen from Table 1, the present invention provides a method for manufacturing an inorganic material insulator, which is simple in manufacturing method and manufacturing facility, has a remarkably low manufacturing process temperature, does not generate carbon dioxide at all, And the mass of the product was greatly reduced.

Next, the results of comparing the characteristics of the present invention with the case of using the existing ceramic fiber directly as a heat insulating material are shown in Table 2 below.

Compare Direct use of existing ceramic fiber Invention of the present invention shape Similar to cotton Sheet type (improvement) Insulation properties (W / m.k) (thermal conductivity) 0.035-0.045 0.027 ~ 0.035 (improvement) Problems on site handling Induced respiratory diseases and skin itching caused by scattering of fine powder in the air No problem (improvement) How to Apply Fireproof Door Core Material Used in combination with foamed urethane Direct use (improvement) Non-combustible characteristic Flammability exists,
Toxic gas generation possibility
(When mixed with foamed urethane) 100% nonflammable, (improved)
No toxic gas at all (improvement)

As shown in Table 2, the present invention improves the heat insulation characteristics, simplifies handling in the field, completely realizes the environment friendliness, and achieves 100% nonflammability as compared with the case where the ceramic fiber is used as a direct thermal insulator .

Meanwhile, in the present invention, the properties of the heat insulating material according to the change of the mixing volume ratio (vol%) of the glass fiber to the ceramic fiber were compared and the results are shown in Table 3 below.

Compared to ceramic fiber (100%)
Volume ratio of water glass (vol%) 50% 70% 80% 100% 120% 130% 150% Degree of foaming (%)
(Relative to ceramic fiber thickness) 120 200 250 300 400 500 550 Pore size (탆) 0.1> 0.1> 0.1> 0.1> 0.1> 0.1> 0.1 < Insulation properties (W / mk)
(Thermal conductivity) 0.05 0.04
~
0.05 0.03
~
0.035 0.03
~
0.032 0.028
~
0.031 Local difference is severe Local difference is severe shape Cotton form
Remaining Cotton form
Some remaining Plate type
(Porous) Plate type
(Porous) Plate type
(Porous) Plate type
(firing
Heterogeneity) Plate type
(firing
Heterogeneity) burglar Commercialization possibility NO NO YES YES YES NO NO

(Drying conditions are from 70 to 80 ° C for 48 to 72 hours) (Foaming conditions using microwaves at 200 to 250 ° C for 3 to 5 minutes)

As shown in Table 3, when the product characteristics according to the change of the mixing ratio are examined, it can be seen that the mixing volume ratio (vol%) of the glass fiber to the ceramic fiber is 80% to 120% have.

In addition, in the present invention, water glass was immersed in a ceramic fiber and dried, and then microwave oven was used to irradiate microwave, and the characteristics of the heating fiber according to the heating time were compared and the results are shown in Table 4 below.

Heating time 3 minutes 5 minutes More than 5 minutes Foaming state Insufficient foaming,
On a dried surface Vitreous  Remaining Sufficient foaming,
Firing to surface Excessive foaming temperature sudden rise,
Partially melted burglar The medium lowness Adiabatic characteristic lowness good Heterogeneity

(Drying condition is drying at 70 ~ 80 ℃ for 48 ~ 72 hours) (Foaming condition using microwave is foaming at 200 ~ 250 ℃)

As shown in Table 4, the characteristics of the product according to the change of heating time by irradiation of microwave are as follows. It is known that the interval condition of the heating foaming time using microwave is suitable for 3 to 5 minutes for product commercialization have.

Claims (3)

A method of manufacturing an insulating material for fire protection,
A first step of mixing 80 vol% of water glass with 100 vol% of ceramic fiber and depositing the mixture;
A second step of drying the immersed mixture at 70 to 80 DEG C for 48 to 72 hours; And
And a third step of irradiating the dried mixture with microwaves and foaming at 200 to 250 ° C for 3 to 5 minutes to produce a heat insulating material. Method of manufacturing fireproof insulation. In an insulation for fire protection,
The mixture is dried by heating at 70 to 80 ° C. for 48 to 72 hours, and the dried mixture is irradiated with microwaves (for example, irradiation, and then foaming at 200 to 250 ° C for 3 to 5 minutes. This is an eco-friendly lightweight fire retardant material for fire prevention using ceramic fiber and water glass. The eco-friendly lightweight fire retardant insulation material for fire protection according to claim 2, wherein the heat insulating material is further cut into a plate of a predetermined size.

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