KR20040110453A - Composition for fireproof material, manufacturing method thereof and its usage - Google Patents

Abstract

PURPOSE: A composition of a fireproof material is provided to improve water resistance, heat insulation and fire proofing property, and to lighten the weight, thereby being suitably used as an interior material for a fireproof door. CONSTITUTION: The composition of a fireproof material comprises 40-95wt% of light inorganic fine particles; 2.5-50wt% of an inorganic binder in liquid phase; and 5-50wt% of alumina cement, wherein the light fine particles is selected from at least one of pearlite, vermiculite, diatomaceous earth and activated carbon, which have a particle size of 0.1-10mm. The composition of a fireproof material is produced by mixing the above-mentioned components with above-mentioned ratio, and carrying out compress molding the mixture with 0.1-1kgf/cm2 of pressure at 200-250deg.C.

Description

Composition for fireproof material, manufacturing method approximately and its usage}

The present invention relates to a composition for a fire protection material, a method for manufacturing the same, and a use thereof. More particularly, the use of alumina cement, an ultra-high temperature fireproof material, as a binder improves the adaptability to a disaster prevention environment, and is particularly preferable as a fire protection material embedded in a fire door. It is about composition.

Fire doors are built in the fire doors. Glass fire doors and paper honeycombs are mainly used as fire doors for fire doors.

However, when the glass surface is used as the fire protection material, the work process of the fire door is very complicated and the working environment of the workers also had a very poor problem. In addition, since the glass surface is dissolved at a low temperature of 700 to 800 ° C, a disaster prevention effect is weakened at a high temperature of 1,000 ° C or more, and there is a problem that disposal is difficult even during disposal.

When using a paper honeycomb as a fireproof material for a fire door, the price of the material itself or ease of work on the fire door is excellent, but since the material is paper, there was a very serious problem in the fire effect itself.

On the other hand, fire retardant materials were manufactured by using light inorganic fine particles such as pearlite, vermiculite, diatomaceous earth and activated carbon as the main raw materials, and sodium silicate (water glass) as a binder, which is excellent in fire resistance but poor in water resistance, especially in high humidity. There was a problem in that the fire prevention material built in the fire door gradually collapsed, and in particular, it could not endure the strong water pressure released in the disaster prevention work in the event of a fire, and thus did not exhibit the fire performance.

Therefore, the inventors of the present invention was trying to develop a fireproof material that can exhibit long-term fire resistance when applied to a fireproof material such as a fire door, having ultra high temperature heat resistance and fire protection performance of 1,000 ° C. or higher, and lightweight inorganic fine particles. As a result of the application of alumina cement in addition to sodium silicate as a binder, it was found that the water resistance is improved while having excellent heat insulation and fire resistance at ultrahigh temperatures of 1,000 ° C. or higher, thereby completing the present invention.

Accordingly, it is an object of the present invention to provide a composition for a fire protection material which is light in weight and has excellent heat insulating ability and fire resistance, and in particular, can improve water resistance.

It is also an object of the present invention to provide a method for producing a fire protection material from such a composition.

Another object of the present invention is to provide a fire door in which a fire protection material obtained from such a composition is incorporated.

The composition for the fire protection material of the present invention for achieving the above object is characterized in that it comprises 40 to 95% by weight of lightweight inorganic fine particles, 2.5 to 50% by weight of a liquid inorganic binder and 5 to 50% by weight of alumina cement. .

1 is a graph measuring the thermal insulation performance of the fire door structure filled with the fire protection material obtained according to Examples 1 to 3,

Figure 2 is a graph measuring the thermal insulation performance of the fire door structure filled with the fire protection material obtained according to Examples 4 to 5 and Comparative Example 1.

The present invention will be described in more detail as follows.

Examples of the lightweight inorganic fine particles used in the composition for fire protection materials of the present invention include pearlite, vermiculite, diatomaceous earth, activated carbon, and the like, and the particle size thereof is preferably 0.1 to 10 mm.

Since such lightweight inorganic fine particles have a pore structure, they can also exhibit heat insulation performance, fire protection performance or sound insulation performance.

It is preferable that the content of the lightweight inorganic fine particles in the composition for the whole fire protection material is 40 to 95% by weight. If the content is less than 40% by weight, the density of the fire protection material is rapidly increased and it cannot be applied as a fire door for fire doors. If the content exceeds 95% by weight, the addition amount of the inorganic binder and the alumina cement in the liquid phase may be too small, causing difficulty in molding and a sharp drop in strength.

As a binder which binds such lightweight inorganic fine particles, in the present invention, a liquid inorganic binder and alumina cement are used in combination.

Examples of the liquid inorganic binder include sodium silicate (water glass), silica sol, alumina sol and the like. Such a liquid inorganic binder exhibits a very stable bonding force at a temperature of 600 ° C or lower.

The content of the inorganic binder in the liquid is preferably 2.5 to 50% by weight of the total fireproof material composition. If the content is less than 2.5% by weight, the binding strength of the alumina cement is weakened. There may be a problem with weight reduction.

However, such a liquid inorganic binder has a property of breaking when it comes in contact with moisture, and thus when using only this as a binder to bind lightweight inorganic fine particles, there is a problem that the water resistance is poor. In the application of fire protection materials to fire doors, the water resistance of fire protection materials is a very important requirement, considering the fact that strong water pressure is directly injected into the fire doors in case of fire.

Therefore, in the present invention, alumina cement is used as a binder, but the content of alumina cement is preferably 2.5 to 50% by weight in the total fire prevention material composition.

When alumina cement is used as a binder, a liquid inorganic binder at a temperature of 600 ° C. or lower and alumina cement at a high temperature of 600 ° C. or higher exhibit a very stable bonding force, thereby exhibiting a stable fire protection effect and a bonding force even at an extremely high temperature of 1,000 ° C. or higher. .

In addition, since the alumina cement supports poor water resistance of the liquid inorganic binder, it is possible to prevent the deterioration of the fire prevention performance due to moisture.

If the content of the alumina cement that plays such a role is less than 2.5% by weight of the total fireproof material composition, there is a problem in the water resistance of the fireproof material, if more than 50% by weight may be a problem in weight reduction due to the increase in the density of the fireproof material.

The fire protection material of the present invention, which is composed of ultra-light inorganic fine particles, has very excellent characteristics in terms of fire performance, insulation, sound insulation, and light weight.

The method for producing a fireproof material with the above composition comprises uniform mixing of lightweight inorganic fine particles, liquid inorganic binder, and powdery alumina cement using a ball mill or the like, and then 0.1 to 1 kgf / cm 2 at 200 to 250 ° C. Molding under pressure gives a completely dried fireproof material.

The fire prevention material thus obtained can freely adjust the density from 0.1 to 0.5 g / cm 3 according to the size of the light inorganic fine particles to be mixed, and in addition to the interior material of the fire door, building materials for various purposes, that is, non-combustible interlayer sound absorbing material, building sandwich ( Sandwich) can be used as a substitute for styrofoam in panels.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited by the Examples.

Example 1

80 g of pearlite fine particles with an average particle size of 3 to 4 mm (produced by Gungon Geotech Co., Ltd.), 60 g of liquid sodium silicate (3 types of silicic acid, Sinheung silicic acid Co., Ltd.) and 20 g of alumina cement in powder form (UAC50, Union) The mixture was uniformly mixed through a 1 hour ball mill. The homogeneously mixed mixture was placed in a mold of a uniform shape and maintained for 10 minutes in a high temperature high pressure molding machine at 250 ° C. pressurized to a pressure of 0.3 kgf / cm 2 to prepare a completely dried fireproof material.

Example 2

Fireproof material was prepared in the same manner as in Example 1 except that vermiculite was used as lightweight inorganic fine particles instead of pearlite fine particles.

Example 3

A fire protection material was prepared in the same manner as in Example 1, except that diatomaceous earth was used as lightweight inorganic fine particles instead of pearlite fine particles.

Example 4

A fire protection material was prepared in the same manner as in Example 1 except that activated carbon was used as lightweight inorganic fine particles instead of pearlite fine particles.

Example 5

A fire protection material was prepared in the same manner as in Example 1, except that 40 g of pearlite fine particles and 40 g of vermiculite were used together.

Comparative Example 1

Fireproof material was prepared in the same manner as in Example 1, except that alumina cement was not added.

Experimental Example

(1) Measurement of apparent density

The apparent density of the fire protection materials obtained according to Examples 1 to 5 and Comparative Example 1 was measured, and the results are shown in Table 1 below.

In the measurement of the apparent density, the fire material was cut at a constant size of 4.0 cm × 5.0 cm × 10 cm, and the apparent density was calculated by measuring the apparent volume and weight.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Apparent density (g / cm3) 0.29 0.30 0.31 0.29 0.30 0.28

From the results in Table 1, it can be seen that the apparent density of the obtained fire protection materials represents about 0.3 g / cm 3. This shows that the fire protection material is ultra light.

(2) measurement of compressive strength

The compressive strengths of the fire protection materials obtained according to Examples 1 to 5 and Comparative Example 1 were measured, and the results are shown in Table 2 below.

In order to measure the compressive strength, the size of the fire protection material was cut at a constant size of 3.5cm × 4.0cm × 10cm and compressed at a speed of 5.00mm / min to measure the compressive strength.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Compressive strength (kgf) 24 22 23 19 21 18 Modulus (kgf / mm2) 0.34 0.27 0.33 0.29 0.30 0.31

From the results of Table 2, the maximum compressive strength to break occurs in both the example and the comparative example was excellent in about 20kgf, it can be seen that the modulus also shows an excellent value of about 0.30kgf / mm2.

(3) water resistance test

After performing the water resistance test of the fire protection material obtained according to Examples 1 to 5 and Comparative Example 1, the results are shown in Table 3 below.

Water resistance test is to measure the compressive strength by impregnating the fire-resistant material cut into 3.5cm × 4.0cm × 10cm in water for 1 hour, then dried in an oven at 100 ℃ for 1 hour and compressed at a rate of 5.00mm / min It was carried out in a way.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Compressive strength (kgf) 23 20 22 18 18 0 Modulus (kgf / mm2) 0.33 0.27 0.31 0.29 0.28 0

The fire prevention material of Comparative Example 1, in which alumina cement was not added as a binder, immediately disappeared as soon as it was impregnated in water, and the panel itself disappeared due to the dissociation of sodium silicate, making it impossible to measure both the compressive strength and the water resistance modulus. However, in the case of the fire protection material according to the present invention, it can be seen that the water-resistant compressive strength and the water resistance modulus value measured after drying show similar results as before the water resistance test by maintaining the bonding strength of the inorganic binder in water.

These results indicate that the fire resistant material added with alumina cement as a binder has excellent water resistance, and the bonding strength of the inorganic binder is not weakened even in the strong humidity fired water sprayed during the weather and fire in summer when the humidity is very high. It can be said that it is a fire prevention material.

(4) Insulation measurement

The thermal insulation properties of the fire protection materials obtained in Examples 1 to 5 and Comparative Example 1 were measured, and the results are shown in FIGS. 1 and 2.

In order to measure the thermal insulation, a furnace adjusted to rise for 1 hour from room temperature to 1,000 ° C was used. After the inlet of the furnace was sealed with a fire door-type steel structure filled with fire protection materials obtained according to Examples 1 to 5 and Comparative Example 1, the temperature change of the center of the outer surface of the steel structure fire door was measured as the temperature of the furnace increased.

1 and 2, it can be seen that the surface temperature of the fire door structure (without fire protection material) which is not filled with the fire protection material increases rapidly with the increase of the temperature of the furnace, and shows the ultra high temperature of 600 ° C. or higher at 1000 ° C. in the furnace. Can be. On the other hand, in the case of the fire door structure filled with the fire protection material according to the Examples and Comparative Examples, even the temperature inside the furnace of 1,000 ℃ shows a low temperature of about 200 ℃. As a result, it can be seen that the fire protection material according to the present invention has a similar heat insulating effect as compared with the fire protection material using only sodium silicate as a binder.

As described in detail above, in the case of manufacturing a fireproof material by using alumina cement together with a liquid inorganic binder such as sodium silicate as a binder of the lightweight inorganic fine particles according to the present invention, the water resistance is improved and the binding strength of the binder is increased even when exposed to moisture. As it is not broken, it can continue its role as a fire protection material, and it is useful as an interior material for fire doors because it has excellent heat insulation performance, fire protection performance and light weight.

Claims (5)

A composition for fire protection materials comprising 40 to 95% by weight of lightweight inorganic fine particles, 2.5 to 50% by weight of liquid inorganic binder, and 5 to 50% by weight of alumina cement. The composition for fire prevention materials according to claim 1, wherein the lightweight inorganic fine particles are at least one selected from pearlite, vermiculite, diatomaceous earth and activated carbon having a particle size of 0.1 to 10 mm. The composition for fire protection materials according to claim 1, wherein the liquid inorganic binder is at least one selected from sodium silicate, silica sol and alumina sol. Uniformly mixing 40 to 95% by weight of the lightweight inorganic fine particles, 2.5 to 50% by weight of the liquid inorganic binder and 5 to 50% by weight of the alumina cement; And Method for producing a fire-retardant material comprising the step of pressing the mixture at a pressure of 0.1 ~ 1 kgf / ㎠ at 200 ~ 250 ℃. Fireproof door containing the fire prevention material of claim 1.