KR101618654B1 - Fire Prevention Net coated Fire-Retardant Material of Environment Friendly and None Toxic Intumescent - Google Patents

Abstract

The present invention relates to a flame retardant net coated with an environmentally friendly and non-toxic foam flame retardant agent, and more particularly, to a flame retardant network coated with a foamable flame retardant agent using a glass fiber net as a binder, When the fire is generated while being easily discharged to the outside, the foam flame retardant which is a coating layer is foamed by the high temperature to prevent the external flame from being transferred to the inner body by blocking the ventilation hole of the screen, so that the foam flame retardant Which is related to the flame retardant network.

Description

{Fire Prevention Net coated Fire-Retardant Material of Environment Friendly and Non Toxic Intumescent}

The present invention relates to a flame retardant net coated with an environmentally friendly and non-toxic foam flame retardant agent, and more particularly, to a flame retardant network coated with a foamable flame retardant agent using a glass fiber net as a binder, When the fire is generated while being easily discharged to the outside, the foam flame retardant which is a coating layer is foamed by the high temperature to prevent the external flame from being transferred to the inner body by blocking the ventilation hole of the screen, so that the foam flame retardant Which is related to the flame retardant network.

Flame retarding is to prevent fire from burning in the event of a fire, which prevents or delays burning during the initial fire.

In recent years, limited flame retardance has been restricted to public facilities. However, as the awareness of flame resistance has been strengthened and related laws have been strengthened, it has been gradually being applied to a wide range of fields. Especially, In addition, flame retardant technology has been applied throughout the industry.

A general flame retarding technique of a coated object is performed by coating the outer surface of the coated object with a coating material containing a flame retardant to form a coating layer or wrapping a flame retardant sheet having a flame retardant coating layer formed thereon. Particularly, in the coating method using the coating layer, the foaming material is mixed with the foaming material in the coating composition to foam the foaming material to form the foaming layer, thereby preventing external heat or flame from being transmitted to the inside, thereby delaying the burning and breakage of the object .

As the foamable material contained in the coating composition, graphite-processed expanded graphite is mainly used. The foamed graphite is prepared by injecting sulfuric acid, nitric acid, or acetic acid into common graphite between layers of hexagonal crystals of graphite. When such expanded graphite is heat-treated, the injected sulfuric acid, nitric acid, and acetic acid are gasified, and volume expansion and ejection are performed, thereby maximizing the expansion force of the foamed graphite. In particular, expanded charcoal (Char) has the function of reflecting heat and flames, so expanded graphite is used for the purpose of flame retarding the fire.

The product to which the expanded graphite having such an advantage is applied is limited in the graphite foaming power, and since the form of the product containing the foamed graphite is in the form of a sheet or a paint, there is a limit to the fire protection of the object having a heat generating structure. For example, a substrate having a heating structure is a power cable or a communication cable, an automobile engine, a boiler of a power plant, or a blast furnace of a steel mill.

In addition, since the carbonized layer formed by the foaming of the foamed graphite has a continuous connection structure, it can block the flame and heat for a limited time. Therefore, a flame retardant of the form capable of forming a shielding film that releases internal heat and blocks the inside and the outside at the time of fire It is necessary.

Korean Patent No. 10-0873655 discloses a structure in which a flameproof sheet is made of artificial leather. However, since the flameproof sheet has a layer structure without a ventilation structure, There is a problem that a larger fire can be caused.

Korean Patent No. 10-1265500 (method for producing a flameproof laminated sheet and apparatus for producing the flameproof laminated sheet) is a method for producing a flameproof laminated sheet by combining a flame-retardant coating agent composed of multiple layers with a sheet made of PET resin, Structure, and when applied to a substrate having a heat generating structure, there is a problem that the PET component melts at a temperature higher than a certain temperature, so that it can not act as a flame retardant.

Korean Patent No. 10-0528317 (method of producing a flame retardant sheet using natural pulp) is a method of producing a flame retardant sheet by dipping a raw material of natural pulp in a flame retardant solution to prepare a flame retardant sheet. However, It has a drawback that it can not perform a flame-proofing function by a natural pump.

The flame retardant net coated with the flame retardant of the present invention,

Normally, ventilation is made inside and outside through through holes. In case of fire, it suppresses the combustion of foam flame retardant which forms a coating layer, minimizes the generation of toxic gases, and provides a flame resistance function against flame and heat to a temperature range of 200 to 1200 ° C The object of the present invention is to provide a flame retardant screen which can delay the change of the structure by combustion or heat by blocking the transfer of flame or heat to the surface of the article and can be easily installed in a circular structure with flexibility.

In order to accomplish the above object, the present invention provides a flame retardant net coated with a flame retardant agent,

A glass fiber net in which a glass fiber yarn is woven in the form of a net so as to form a plurality of through holes in a flame retardant net coated with a flame retardant; And a foamed flame retardant coating layer coated on the outer surface of the glass fiber yarn.

The glass fiber net is formed to have a thickness of 3 to 32 meshes (0.5 to 7.09 mm intervals), and the foam protection coating layer coated on the glass fiber net is coated to have a thickness of 0.2 to 2 mm, .

The foaming flame retardant agent for forming the foam flame retardant coating layer may be a foamed material obtained by mixing alone or in plurality from the group consisting of expansive graphite, vermiculite or perlite; (Ethylene vinyl acetate) or PVA (polyvinyl acetate), and the binder is composed of 15 to 100 parts by weight of a binder mixed with 100 parts by weight of the foamed product.

Further, as the auxiliary flame retardant, natural resin or synthetic rubber is mixed in an amount of 15 to 50 parts by weight based on 100 parts by weight of the foamed material; A flame retardant phosphorus or melamine-based flame retardant may be mixed in an amount of 15 to 50 parts by weight based on 100 parts by weight of the foamed product.

Further, in the above flame retardant, 5 to 15 parts by weight of silicon carbide may be further mixed with 100 parts by weight of the foamed material; Ammonium polyphosphate, monoammonium phosphate, diammonium phosphate, phosphoric acid, and the like, in an amount of 7 to 25 parts by weight based on 100 parts by weight of the foamed material.

The flame retardant net coated with the flame retardant of the present invention by the above-

The fiberglass mesh is used as the basic framework, and the glass fiber yarn that forms the fiberglass mesh is coated with the flame retardant agent to form the coating layer of the flame retardant network, so that a large number of through holes are formed on the surface of the flame retardant net, The structure can be easily installed.

Also, by using a basic skeleton as a glass fiber material to prevent combustion even at a high temperature, a frame shape is maintained, so that the coated layer maintains its shape so that the foam layer can be uniformly formed during foaming, .

In addition, since the flame retardant net is formed in a net shape, a large number of through holes are formed to maintain ventilation to the inside and outside of the room to ventilate the inside heat. Thus, the present invention is also advantageous in providing a flame retarding and ventilating effect .

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flame retardant net coated with a foam flame retardant according to the present invention.
FIGS. 2A and 2B are enlarged cross-sectional views of a flame retardant net according to the present invention before and after foaming; FIG.
FIGS. 3A to 3C are schematic views showing various installation examples of a flame retardant net according to the present invention; FIGS.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

FIG. 1 is a view showing a flame retardant net coated with a flame retardant according to the present invention, and FIGS. 2 (a) and 2 (b) are enlarged cross-sectional views of a flame retardant net according to the present invention after foaming.

As described above, the flame retardant net coated with the environmentally friendly and non-toxic foam flame retardant according to the present invention comprises a fiberglass net formed by weaving a glass fiber yarn in a net shape so as to form a plurality of through holes, Lt; / RTI >

The glass fiber net is in the form of a mesh in which a glass fiber yarn is woven in the form of a net. Such a glass fiber is excellent in heat resistance, absorptivity, and low hygroscopicity. Also, it has good durability and does not corrode, and has a strong tensile strength.

It is preferable that the glass fiber net is formed of 3 to 32 mesh (0.5 to 7.09 mm) so that a plurality of through holes are formed in the net even if the glass fiber net is coated in the process described later. In the case of forming a glass fiber net below the 32 mesh (0.5 mm), since the size of the through holes formed in the glass fiber net is small in the coating of the flame retardant, the air permeability is lowered or the through holes are filled by the coating of the flame retardant, It is preferable to form a glass fiber net beyond the mesh. In addition, when the glass fiber net is formed with a thickness of 3 mesh (7.09 mm) or more, the thickness of the foam protective coating layer must be thick. However, in order to increase the foaming flame retardant coating layer, it is necessary to increase the amount of the binder to increase the binding force. When the amount of the binder is increased, the amount of the foaming material is decreased in the whole material and the expansion rate by foaming is lowered. Thereby causing a problem that the binder is burned. Therefore, it is desirable to set the mesh to 3 mesh or less to prevent the thickness of the coating layer of the foam flame retardant from being excessively increased.

The foaming flame retardant which is coated on the outer surface of the fiberglass net to form a coating layer of the foam flame retardant may be a mixture of foamed materials singly or plurally mixed from the group consisting of expansive graphite, vermiculite or perlite; (Ethylene vinyl acetate) or PVA (polyvinyl acetate). The binder may be a mixture of a binder and a binder.

Expanding the foam at a high temperature to form a foam layer.

Representative such expandable graphite is a graphite interlayer material (GIC), which is produced by injecting sulfuric acid, nitric acid, or acetic acid into the interstices of graphite, and has a size of 50 to 100 mu m. Sulfuric acid, nitric acid, or acetic acid, which is trapped between the layers of graphite, expands at 150 ° C. to 300 ° C., and graphite expands to form a foam layer.

The vermiculite is a flaked mineral having a similar appearance to mica in its natural state, and is expanded 8 to 30 times when heated at 100 to 1200 ° C. Its density is 0.07 ~ 0.30g / ㎤, it is lightweight with porous structure due to innumerable pores. It has thermal conductivity of 0.06㎉ / mh ℃ or less, fire resistance of 1,400 ℃ ± 50 ℃, and insulation. The vermiculite has optimal insulating properties, good absorption and ion exchange ability, is chemically non-toxic and stable.

In addition, perlite is a perlite, which is a perlite, which is a glassy rock formed by rapid cooling of lava generated by volcanic activity. It contains 2.5% of crystallized water. When heated rapidly at a temperature of 871 ° C or higher, It becomes an expanded expanded perlite, and usually the perlite leads to an expanded perlite. In the perlite, numerous pores are formed in the perlite particles as the crystallization water is vaporized, and the perlite is expanded to about 10 to 20 times the original volume, resulting in a very light and unique physical property. Particularly, light weight (unit volume weight: 0.03 (0.25g / L), non-toxic (pH: 6.5 ~ 7.5), thermal insulation (thermal conductivity: 0.03 ~ 0.05 kcal / mh ℃) I have.

Next, the binder is mixed to give a bonding force between the foamed material to be mixed and the glass fiber net.

EVA (Ethylene Vinyl Acetate), a typical example of a binder, is a material made by copolymerizing ethylene and vinyl acetate, and has excellent elongation, tensile strength, heat insulation and flexibility, and is a harmless material that is harmless to the human body.

The EVA has a protective film formed to a temperature of 70 ° C to 150 ° C by the heat insulating property to prevent the gas generated in the foamed material from being discharged to the outside to improve the expandability of the foamed material and to adhere the foamed material to the glass fiber net.

The other binder, PVA (polyvinyl acetate), may be used alone or in combination with a latex or synthetic rubber resin which is a natural rubber resin. The PVA provides an effect of improving the expandability of the foamed product by forming a film.

Such a binder is mixed in an amount of 15 to 100 parts by weight based on 100 parts by weight of the foamed material. When the amount of the binder is less than 15 parts by weight, it is difficult to adhere the foamed material to the fiberglass net. When 100 parts by weight or more of the foamed material is mixed, The foaming power is lowered. Therefore, it is preferable that mixing is carried out within the above range.

Next, a natural resin or a synthetic rubber may be further mixed with the fire retardant agent as an auxiliary binder. The natural resin may be a natural latex or the like, and a flexible film may be formed to prevent the foam layer from being separated while forming more foam layers. When natural latex is used as the auxiliary binder, it is solidified with diluted acid, and subjected to washing, dehydration, drying, and disinfection to prepare a solid rubber. When synthetic rubber is used as an auxiliary binder, a binder such as toluene is used to produce a binder do. At this time, the toluene is volatilized in the drying process after the preparation of the auxiliary binder and does not greatly affect the weight. However, it is more preferable to use the natural latex rather than the synthetic rubber because about 2 to 3% by weight of the toluene is expected to remain.

The auxiliary binder is mixed in an amount of 15 to 50 parts by weight with respect to 100 parts by weight of the foamed material. When the amount of the auxiliary binder is less than 15 parts by weight, the film forming rate is low and the effect of promoting foaming is low. Is lowered, the foaming power is lowered. Therefore, it is preferable to mix within the above range.

Further, the amount of the foaming material can be further increased to improve the foaming power, but the foaming protective coating material layer can be peeled or peeled off from the glass fiber net due to deterioration of the adhesion as described above. Therefore, by forming the flexible film by mixing the auxiliary binder, the expandability (foamability) of the foamed product can be improved without peeling or peeling off the foamed flame retardant coating layer.

Further, the flame retardant may be further mixed with the flame retardant to improve the flame retardancy of the binder. As the flame retardant, phosphorus or melamine series may be mixed, and they may be mixed in an amount of 10 to 50 parts by weight based on 100 parts by weight of the foamed product. When the blending amount is less than 10 parts by weight, the flame retardancy is insufficient. When the blending amount is more than 50 parts by weight, the degree of improvement of flame retardancy is insufficient.

Further, when expandable graphite is used as a foamed material, an oxidizing agent is used in the process of producing expandable graphite, so that the foaming reaction time can be reduced by further mixing an acid catalyst. The acid catalyst can be used alone or in combination of two or more members selected from the group consisting of ammonium polyphosphate, monoammonium phosphate, diammonium phosphate and phosphoric acid. The acid catalyst is mixed in an amount of 7 to 25 parts by weight based on 100 parts by weight of the foamed material. If the amount of the acid catalyst is less than 7 parts by weight, shortening of the foaming reaction time is insufficient. If the amount of the acid catalyst is more than 25 parts by weight, It is preferable to mix them within the above range.

The foam flame retardant forming the coating layer of the foam flame retardant may further include silicon carbide. Since the silicon carbide has excellent thermal conductivity, it can transmit heat to the surrounding foams in the event of a fire, thereby rapidly increasing the temperature of the foaming material, so that rapid foaming can be achieved. Such a silicon carbide is used in an amount of 5 to 15 parts by weight based on 100 parts by weight of the foamed material. When the amount of the silicon carbide is less than 5 parts by weight, improvement in foamability is insufficient. When the amount of the silicon carbide is more than 15 parts by weight, Mixing is preferred.

The thus-prepared foam flame retardant is coated on a glass fiber net of 3 to 32 mesh (0.5 to 7.09 mm) to have a thickness of 0.2 to 2 mm to form a coating flame retardant coating layer.

That is, the anti-flame retardant coating layer is applied so as to surround the glass fiber yarn of the glass fiber net, as shown in FIG. 2A, so that a coating flame retardant coating layer is formed for each glass fiber yarn. In the glass fiber net having the anti- A large number of communicating through holes are formed to allow the air to flow inside and outside. It is preferable that the coating layer of the foam flame retardant coating layer is formed so as not to cover the through hole of the glass fiber net in the normal state and to form the coating layer of the flame retardant coating with the flame and heat in the fire to fill the through hole of the glass fiber net. When the thickness of the coating layer of the foam protective coating to be coated on the glass fiber thread constituting the glass fiber net formed from the 3 to 32 mesh (0.5 to 7.09 mm) is 0.2 mm or less, the glass fiber net is not filled with the through- If the thickness of the coating layer of the flame-retardant coating is more than 2 mm, it is not possible to form a through-hole in the flame retardant net even during normal operation due to the formation of an excessive coating layer, They may be peeled off or peeled off during the formation process, and thus it is preferable to form them in the above range.

For example, when the gap of the glass fiber net is 6 mm, the coating layer of the foam protection flame-retardant of the glass fiber yarn is formed to be 3 mm or less so that a through hole is formed between the glass fiber yarn chambers formed with the flame retardant coating layer. A thickness of 1.5 mm is formed so that a through hole having a diameter of 3 mm or a length of one side is formed. That is, it is preferable that the coating thickness of the foam flame retardant coating layer is 0.1 to 0.3 times as long as the glass fiber interval length of the glass fiber net so that the inside / outside air flow of the flame retardant net is smoothly performed, .

As shown in FIG. 2B, the flame retardant net in which the coating layer of the foamed flame retardant is formed on the glass fiber net is flame-retarded by firing the flame retardant coating layer by the flame and heat during the fire to fill the through holes.

It was found through experiments that the flame retardant net has flame retardant function even when flame and heat are applied up to 1200 ° C. As a result of analyzing the gas generated when the flame is combusted at a temperature of 1200 ° C. or more, it is known that the content of harmful components is extremely low there was.

Since the flame retardant coating layer of the present invention has flexibility, it is possible to cover the upper portion of the electric power cable installed at the floor as shown in FIG. 3A and to provide the internal and external flowability at normal times, In case of fire, it blocks internal and external parts by foaming to prevent the external heat from being transmitted to the electric power cable, thereby delaying the loss of the electric power cable. It is possible to increase the power supply time so as to minimize the damage caused by the fire.

As shown in FIG. 3B, the flame-proofing net of the present invention may be installed to enclose a cable tray on which various cables are laid, so as to block the external heat. As shown in FIG. 3C, Heat can be blocked.

Example 1

- Fiberglass mesh used is 5 mesh (5 * 5mm).

-Furnitive flame retardant is a mixture of 100 parts by weight of expanded graphite, 60 parts by weight of EVA as a binder, 30 parts by weight of a natural resin (latex) as an auxiliary binder, 30 parts by weight of a flame retardant, 10 parts by weight of silicon carbide, and 15 parts by weight of monoammonium phosphate .

- Glass fiber yarn of glass fiber net was coated to have a thickness of 1 mm to form a coating layer of a flame retardant.

- The size of the through hole was 3 * 3mm.

- 300 * 300 mm flat plate flameproof

Example 2

- Fiberglass mesh used is 5 mesh (5 * 5mm).

-Furnitive flame retardant is a mixture of 100 parts by weight of expanded graphite, 60 parts by weight of EVA as a binder, 30 parts by weight of a natural resin (latex) as an auxiliary binder, 30 parts by weight of a flame retardant, 10 parts by weight of silicon carbide, and 15 parts by weight of monoammonium phosphate .

- Glass fiber yarn of glass fiber net was coated to have a thickness of 1 mm to form a coating layer of a flame retardant.

- The size of the through hole was 3 * 3mm.

- Cylindrical flameproof mesh with a diameter of 100 mm and a height of 300 mm

Example 3

- Fiberglass mesh used is 5 mesh (5 * 5mm).

-Furniture flame retardant was prepared by mixing 100 parts by weight of expanded graphite, 60 parts by weight of EVA as a binder, 30 parts by weight of a flame retardant, 10 parts by weight of silicon carbide and 15 parts by weight of monoammonium phosphate as an acid catalyst.

- Glass fiber yarn of glass fiber net was coated to have a thickness of 1 mm to form a coating layer of a flame retardant.

- The size of the through hole was 3 * 3mm.

- 300 * 300 mm flat plate flameproof

Example 4

- Fiberglass mesh used is 5 mesh (5 * 5mm).

-Furniture flame retardant was prepared by mixing 100 parts by weight of expanded graphite, 60 parts by weight of EVA as a binder, 30 parts by weight of a flame retardant, 10 parts by weight of silicon carbide and 15 parts by weight of monoammonium phosphate as an acid catalyst.

- Glass fiber yarn of glass fiber net was coated to have a thickness of 1 mm to form a coating layer of a flame retardant.

- The size of the through hole was 3 * 3mm.

- Cylindrical flameproof mesh with a diameter of 100 mm and a height of 300 mm

Experimental Example 1 (Measurement of Flame Retardation Time)

Heating was carried out according to the heating temperature curve of -KS F 2257-1.

In Examples 1 and 2, the flame retardant coating layer was foamed at 160 ° C., and flame resistance was provided up to 1100 ° C.

In Examples 3 and 4, the foaming agent for the flame retardant coating layer was foamed at 170 ° C, and flame resistance was provided up to 1000 ° C.

In all of Examples 1 to 4, complete foaming was performed at 250 to 300 ° C to form a foam layer to block all through holes.

It was confirmed that there was no difference in flame retardancy even when the flame retardant net of the flat plate (Examples 1 and 3) was circular (Example 2 and Example 4).

As described above, the flame retardant net of the present invention has a flexible flame retardant coating layer formed on a glass fiber net that can maintain its shape even at a high temperature, and it is installed on various types of substrate to protect the flame from the flame. In addition, since a large number of through holes are formed in the flame retardant net to have a ventilation property, it is installed in a substrate having a heat generating structure to provide air permeability in a normal state, and in case of a fire,

10: Flame Retardant Network
20: Fiberglass mesh
21: glass fiber thread 22: through hole
30: foaming flame retardant coating layer
31: foam layer
40: Power cable
50: Cable tray

Claims (7)

In a flame retardant net coated with a flame retardant,
A fiberglass net fabricated in the form of a net of 3 to 32 mesh (0.5 to 7.09 mm) intervals so as to form a plurality of through holes; And a foamed flame retardant coating layer coated on the outer surface of the glass fiber yarn with a thickness of 0.2 to 2 mm to block the through holes formed in the flameproof mesh upon foaming;
The foam flame retardant for forming the above-
100 parts by weight of a foamed product alone or in a plurality of mixtures from the group consisting of expandable graphite, vermiculite or perlite;
15 to 100 parts by weight of a binder alone or in combination from the group consisting of EVA (Ethylene Vinyl Acetate) or PVA (Polyvinyl acetate);
15 to 50 parts by weight of an auxiliary binder which is a natural latex;
15 to 50 parts by weight of a phosphorus or melamine-based flame retardant;
5 to 15 parts by weight of silicon carbide; And
And 7 to 25 parts by weight of an acid catalyst mixed with one or more members selected from the group consisting of ammonium polyphosphate, monoammonium phosphate, diammonium phosphate and phosphoric acid.
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