KR20190096111A - Pulp board having flame retardancy - Google Patents

Abstract

The present invention relates to a pulp board having flame retardancy. An objective of the present invention is to provide a pulp board having flame retardancy which comprises a flame retardant composition, inorganic powder, and pulp.

Description

Flame Retardant Pulp Board {PULP BOARD HAVING FLAME RETARDANCY}

The present invention relates to a flame retardant pulp board comprising a flame retardant composition, inorganic powder and pulp.

Various boards manufactured by mixing organic and inorganic materials are used, mainly gypsum boards used as building interior materials. Boards using such artificial materials are harmful to health and cause pollution by radiation release, fine dust release, and VOCs (Volatile Organic Compounds) release by adhesives due to the nature of the raw materials themselves.

In addition, various special functions such as durability, sound insulation, sound absorption, heat resistance, and the like for building materials are required. Therefore, the problem of harmfulness and pollution caused by the addition of functional ingredients is more serious. Recently, as the number of cases of damage or disease caused by harmful substances emitted from new building materials such as sick house syndrome increases, the law regulating the release of harmful substances to building materials is being strengthened.

In the case of the flame retardant board, it is installed inside the building and is located closest to the living space, so that it is possible to suppress the emission of harmful substances, and it is more important to be made of environmentally friendly materials. Conventional flame retardant boards are manufactured by putting organic components such as flame retardants in the packed layer of the board, but because it is impossible to dispose of volatile substances harmful to the human body, or easily disposed, there is a problem that is discarded as construction waste.

In order to solve this problem, building boards using eco-friendly materials such as ocher, chaff, or hemp powder have been proposed, and flame retardant boards using pulp or fiber have been proposed to include various inorganic components and secure lightweight.

However, as the flame retardant board utilizes eco-friendly materials, the flame retardant board constructs the inner wall of the building vertically on the floor of the building, and there is a problem in that the board is deformed due to temperature change or humidity change in the room. There was a problem that the adhesiveness with the wallpaper is installed on the outer surface of the bar to solve this problem to solve the problem that the harmful material is released to the wallpaper by using the organic adhesive component on the board surface to solve the problem.

Therefore, in the flame-retardant board that is constructed as an inner wall of the building, it is urgent to develop a technology for the flame-retardant board having improved flame resistance and long lifespan due to excellent flame retardancy by using environmentally friendly materials.

The present invention aims to solve the problems of the prior art and the technical problems that have been requested from the past. It is an object of the present invention to provide a flame retardant pulp board that does not emit formaldehyde, toluene, radon and the like harmful to a human body. .

In addition, an object of the present invention is to provide a flame-retardant pulp board that does not swell or dismantle the board according to changes in temperature and humidity in the room, and does not denature, and that the color of the wallpaper is changed as the binder elutes.

It is an object of the present invention to provide a flame retardant pulp board that is excellent in dimensional stability, easy to construct, is maintained without deformation even in long-term use of buildings, and has excellent durability and water resistance.

In addition, an object of the present invention is to provide a flame retardant pulp board that is excellent in flame retardancy, can prevent property and life damage in case of fire as much as possible, and does not discharge toxic gas even if fired.

In addition, an object of the present invention is to provide a flame-retardant pulp board that is excellent in adhesion and easy to construct even when wallpaper is wallpapered on the outer surface of the board.

Therefore, the flame retardant pulp board according to the present invention for achieving the above object includes a flame retardant composition, inorganic powder, and pulp.

The pulpboard according to the invention is characterized in that the flame retardant composition comprises water, ammonium sulfate, erythritol, phosphorus flame retardant and butylmethoxydibenzoylmethane.

On the other hand, the inorganic powder may be at least one selected from the group consisting of aluminum hydroxide, antimony oxide, magnesium hydroxide, vermiculite powder, loess powder, silica, dolomite powder and zirconium.

The flame retardant composition may include 100 parts by weight of water and 10 to 50 parts by weight of ammonium sulfate, 1 to 10 parts by weight of erythritol, 10 to 60 parts by weight of phosphorus-based flame retardant and 1 to 10 parts by weight of butylmethoxydibenzoylmethane.

The flame retardant pulp board may include a flame retardant composition, inorganic powder and pulp in a weight ratio of 100: 10 to 60:50 to 70.

The present invention does not emit harmful organic substances, etc. to the human body has an effect of being environmentally friendly and excellent flame retardancy.

In addition, the present invention has the effect that the board does not swell or disassemble according to the change in temperature and humidity of the room, does not denature, and the color of the wallpaper does not deteriorate with the elution of the binder.

The present invention is excellent in dimensional stability, easy to construct, is maintained without deformation even in the long-term use of the building, has an excellent durability and water resistance.

In addition, the present invention is excellent in flame retardancy, it is possible to prevent the damage to property and life as much as possible in the case of fire, and has the effect of emitting no toxic gas even if fired.

In addition, the present invention maintains excellent adhesion even when the wallpaper on the outer surface of the board is economical in terms of time and cost of the internal construction process of the building.

The present invention relates to a flame retardant pulp board, and to a functional board having flame retardancy and light weight.

In consideration of the light weight of the building board and the environmental friendliness of the material, a pulp material is used, but the pulp material is generally manufactured by drying wood, including cellulose, and has a large flammability. However, when using a mixture of flame retardants together, it is possible to manufacture a building board having both flame retardancy and light weight.

Specifically, the flame retardant pulp board according to the present invention includes a flame retardant composition, inorganic powder, and pulp, and has excellent flame retardancy and light weight.

On the other hand, since the flame retardant included in the ordinary flame retardant board or coated on the surface uses an organic material, and the binder component used together with the flame retardant also emits harmful substances, there is a problem that is particularly harmful to the human body. On the other hand, the flame retardant pulp board according to the present invention uses a flame retardant composition with less harmful substances, contains a small amount of flame retardant components, and has an effect of improving flame retardancy including inorganic powder.

Many environmentally friendly flame retardant boards in the related art have been proposed by including an inorganic component, an eco-friendly flame retardant board having improved flame retardancy, but the quality of the board itself has been a problem as the content of the inorganic component increases. As the inorganic component increases, there is a problem of increasing the content of the binder, there is a problem in that the manufacturing cost is excessive, or there is a problem in that harmful substances are released from the binder, rather the problem that the environmental friendliness is impaired. In addition, the components constituting the board did not maintain excellent adhesion, there was a problem that the board is broken or the layer is separated after construction.

However, the flame retardant pulp board according to the present invention includes a flame retardant composition comprising water, ammonium sulfate, erythritol, phosphorus flame retardant and butylmethoxydibenzoylmethane, so that the board does not bend or break even under temperature and humidity changes, and the shape is not deformed. There is no effect of excellent dimensional stability. In particular, this problem has the advantage of preventing additional damage due to the collapse of the inner wall in the event of a fire.

The flame retardant pulp board may include a flame retardant composition, inorganic powder and pulp in a weight ratio of 100: 10 to 60:50 to 70, preferably 100: 25 to 40:55 to 60.

In the case where the inorganic powder constituting the flame retardant pulp board is added in excess of the above ratio, there is a problem that the inorganic components are not sufficiently bonded and the board layer is crushed or broken. When added in a smaller amount than the ratio, since the durability of the board itself is lowered, there is a problem that the board is bent or broken by external pressure or impact, and there is a problem of insufficient rigidity as a building material.

If the pulp is added in excess of the ratio, there is a problem in that the strength of the board is lowered by absorbing external moisture, and in the long run may cause a problem in the direction of the thickness of the board. If it is added in a smaller amount than the above ratio, the inorganic powder and pulp constituting the board is not easily and tightly broken, there is a problem that the inorganic powder, pulp and flame retardant composition is not mixed, the inorganic powder is eluted. .

The inorganic powder constituting the flame retardant pulp board of the present invention is not particularly limited as long as it is an inorganic material and has excellent flame retardancy. Preferably, aluminum hydroxide, antimony oxide, magnesium hydroxide, vermiculite powder, ocher powder, silica, dolomite powder, and zirconium are used. It may be one or more selected from the group consisting of. More preferably, it may be aluminum hydroxide or antimony oxide.

In addition, the flame retardant composition may include 100 parts by weight of water and 10 to 50 parts by weight of ammonium sulfate, 1 to 10 parts by weight of erythritol, 10 to 60 parts by weight of phosphorus-based flame retardant and 1 to 10 parts by weight of butylmethoxydibenzoylmethane. Preferably, it may include 20 to 40 parts by weight of ammonium sulfate, and more preferably 30 to 40 parts by weight, based on 100 parts by weight of water.

In addition, in the flame retardant composition, erythritol may be preferably contained in an amount of 2 to 7 parts by weight, more preferably 3 to 5 parts by weight. When the content of erythritol is added less than the content range, the inorganic powder and the solid components such as pulp may not be adhered well, and thus the board itself may be inferior in durability. There is a problem that excessive time for mixing with the ingredients is consumed.

The phosphorus flame retardant may preferably be included in 20 to 55 parts by weight, more preferably 30 to 50 parts by weight. When added within the content range it is possible to ensure the desired flame retardancy, but when added in excess of the flame retardant outside the content range there is almost no difference in flame retardancy it is useless to add additional.

The phosphorus flame retardant is not particularly limited as a phosphorus compound, but phosphate esters such as red phosphorus, triphenyl phosphate, and tricresyl phosphate, metal phosphate salts such as sodium phosphate and magnesium phosphate, salts with organic bases such as ammonium phosphate and melamine phosphate, or It may be at least one selected from the group consisting of salts with an organic base such as amide, ammonium polyphosphate, melamine of polyphosphoric acid or amide.

The butylmethoxydibenzoylmethane may be included preferably 1.5 to 5 parts by weight, more preferably 2 to 4 parts by weight. When added in a smaller amount than this, there is a problem in that the solid components such as inorganic powder and pulp are not combined and loosened, there is a problem in that the board is swollen or disassembled by absorbing moisture, and when the amount is added in excess, the viscosity of the flame retardant composition There is a problem that it is difficult or impossible to mix the inorganic powder and the pulp into the flame retardant composition because of the high, the board production itself is difficult.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited thereto.

<Production example>

Boards were prepared according to Table 1 below.

In Comparative Example 4, the solid component and the flame retardant composition were not mixed, only the pulp was mixed with the flame retardant composition, and the antimony oxide powder was present in an agglomerated powder state, and thus it was impossible to form a pulp board.

In Comparative Example 2, the viscosity of the flame retardant composition was so large that mixing with the pulp and antimony oxide powder was impossible.

(Unit: parts by weight) Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Antimony oxide 53 53 53 35 12 0 154 pulp 101 101 101 119 142 154 0 water 100 100 100 100 100 100 100 Ammonium Sulfate 35 35 30 35 35 35 35 Pentaerythritol 4 4 3 4 4 4 4 Triethylphosphate 36 39 30 36 36 36 36 Butylmethoxydibenzoylmethane 3 - 15 3 3 3 3

Experimental Example

The test was carried out as follows for the prepared pulp board and the results are shown.

-Denaturation test

The pulp board is molded into 50 * 50 cm ² , coated on the surface of the board and attached with white wallpaper, and the pulp board is placed in a chamber where the humidity and temperature are maintained for about a month, and then the pulp after one month. The color of the board was checked for color change.

Install the pedestal at both ends so that one side of the pulp board placed in the chamber for one month and 5 cm away from the corresponding side of the pulp board is installed. It was.

Example Comparative Example 1 Comparative Example 3 Comparative Example 5 Comparative Example 6 shape
transform
Untreated No change No change No change No change No change After 5 seconds impregnation in water Almost no warpage Uneven thickness deformation, large bending and cracking Thickened, largely curved but not broken Thicker, rougher board surface Board surface is broken 50 ℃, humidity 70 ~ 80% No change Board layer gap, warpage 1.1 times more thick 1.3 times thicker thickness and warpage Many large cracks on board surface Color transformation Untreated No change Slightly yellowed No change Slightly yellowed No change After 5 seconds impregnation in water No change Discoloration to yellow Ivory Degeneration Observe yellow stains on the board surface Bleached 50 ℃, humidity 70 ~ 80% No change Ivory Degeneration No change Slightly yellowed Bleached

-Flame retardancy test

The heating test in accordance with the Korean Industrial Standard KS F ISO 5660-1 was carried out, and the results are as follows.

Example Comparative Example 1 Comparative Example 3 Comparative Example 5 Comparative Example 6 heating
exam

Total heat release 7 MJ / m ² 7 MJ / m ² 30 MJ / m ² 40 MJ / m ² 10 MJ / m ² Heat release rate 180 kW / m ² 195 kW / m ² 400 kW / m ² 560 kW / m ² 190 kW / m ² Appearance change The surface is blackened Cracking A little bit The surface is blackened and largely dug Cracks on the surface and some peel off

According to the test results, in the case of a flame-retardant pulp board containing a flame-retardant composition as in the embodiment, it can be confirmed that the strength as a pulp board, does not deform and deform under moisture and temperature changes, and also excellent physical properties as a flame retardant material. .

In particular, the pulp board is used as the interior wall material of the pulp board is finished with wallpaper on the surface, so that there should be no appearance or color change in the living space, the pulp board of the embodiment is the wallpaper, the adhesive strength is deteriorated while using environmentally friendly materials, It has the advantage of not being denatured.

Comparative Example 1, compared with the Example, after the impregnation in water or after being left for a long time in a high humidity and high temperature conditions, the color change of the board itself occurs, the problem that the thickness of the board is modified occurs, Comparative Example 3 and Comparative Example 5, there is a problem in that the pulp board is produced, including the excess pulp, water-vulnerable characteristics and some color change. In addition, in the case of Comparative Examples 3 and 5, the flame retardant property was significantly decreased in the heating test, and the total amount of heat emitted and the maximum amount of heat emitted were observed to be about 2 times higher than in the Examples, and the appearance changes such as pies on the surface of the board were also observed. .

Comparative Example 6 is a board consisting of only antimony oxide, and does not include pulp, there is a problem in that the binding force between antimony oxide falls. In particular, the durability is remarkably inferior, not only susceptible to heating or moisture, but further cracking is observed after drying, making it unsuitable for use as a building material.

On the other hand, according to the standard on the interior finishing materials of the building (Ministry of Land, Transport and Maritime Affairs notice 2012-624), "The total amount of emitted heat less than 8MJ / ㎡ for 5 minutes after the start of the heating test according to the Korean Industrial Standard KS F ISO 5660-1, 5 minutes maximum heat release rate does not exceed 200kW / ㎡ continuously for 10 seconds or more, and harmful cracks, holes, and melting on fire prevention through the test body after heating for 5 minutes (in the case of a composite material, the core material is all melted and extinguished) It is confirmed that the flame retardant pulp board according to the embodiment is most suitable for use as a flame retardant material among the interior finishing materials of buildings.

Claims (5)

A flame retardant pulp board comprising a flame retardant composition, inorganic powder and pulp. The method of claim 1,
The flame retardant composition is a flame retardant pulp board comprising water, ammonium sulfate, erythritol, phosphorus flame retardant and butyl methoxydibenzoyl methane. The method of claim 1,
The inorganic powder is flame retardant pulp board, characterized in that at least one selected from the group consisting of aluminum hydroxide, antimony oxide, magnesium hydroxide, vermiculite powder, ocher powder, silica, dolomite powder and zirconium. The method of claim 2,
The flame retardant composition is 100 parts by weight of water and 10 to 50 parts by weight of ammonium sulfate, 1 to 10 parts by weight of erythritol, 10 to 60 parts by weight of a phosphorus flame retardant and 1 to 10 parts by weight of butylmethoxydibenzoylmethane. board. The method of claim 1,
The flame retardant pulp board is a flame retardant pulp board, characterized in that it comprises a flame retardant composition, inorganic powder and pulp in a weight ratio of 100: 10 ~ 60: 50 ~ 70.