KR20210108648A - Manufacturing Method of Interior Board - Google Patents

Abstract

Disclosed is a method of manufacturing a nonflammable interior panel using sawdust and wood chips, wherein a nonflammable interior panel uses a wood material as a main material while having high strength, and excellent warmth-keeping, insulation and noise absorption, and has a function as a fire-retardant construction material by inducing the mineralization and flame-resistance of a wood component due to a chemical reaction between the wood material, cement and additives, and then, a coating material such as an existing crystal sealer is applied to the surface of the material to form the surface like lithia (lithium-aluminum minerals) glass such that a film which does not cause decomposition or dissolution even at a maximum temperature of 1,300℃ can be formed, and, as a result, the fire-retardant material combined with wood and cement causes a material property change to a nonflammable material to have excellent heat resistance without producing toxic gas in case of a fire. According to the present invention, the method comprises the following steps of: preparing an additive by diluting an aluminum sulfate solution in water; preparing a wood material by mixing sawdust with wood chips; putting the wood material into the additive and settling the same for 10 minutes at a temperature of 65-80℃; and mixing cement through a stirrer in a state, in which the moisture content of the wood material is 75-80%, to form a panel through a vibration and compression technique.

Description

Manufacturing method of non-combustible interior panel using sawdust and wood chips {Manufacturing Method of Interior Board}

The present invention relates to a method for manufacturing a non-combustible interior panel using sawdust and wood chips as the main raw materials, while having high strength, excellent thermal insulation, thermal insulation and noise absorption, and excellent incombustibility and heat resistance, using sawdust and wood chips.

A generally known method of manufacturing an interior panel is, for example, a fire resistant structure in which 15T fire-resistant gypsum board and 9T fiber-reinforced cement board (Vista Board) are constructed on both sides of a C-STUD by compression molding method, Although there is a method of integrally molding with lightweight aerated concrete using finely pulverized silica (Sio2) as a raw material, the panel manufactured by this method has good physical properties such as strength and fire resistance, but is weak against moisture and has excellent sound insulation and There is a disadvantage that the thickness of the product must be relatively thick in order to maintain the noise absorption power, and it is mainly used as a partition or interior panel of a building.

Moreover, in the case of the conventional interior panel for interior materials manufactured by the above method, the material is limited, so not only does the aesthetic sense fall, but in particular, it is insufficient to solve noise pollution and fire in underground multi-use businesses or complex residential types. It can only be used in a limited way, and it is true that it has led to valuable human casualties, especially in the event of a fire.

The present invention is to solve the problems of the conventional interior panel for interior materials, the purpose of which is to use wood material as the main raw material, while having high strength, excellent thermal insulation, heat insulation, and noise absorption, and the wood material, cement and additives are chemically After reacting and inducing mineralization and flame resistance of wood components to have a function as a flame-retardant building material, existing coating materials, for example, Japanese Patent No. 1991554 (Title of the invention: modifier of porous material, modification method) and modified material) of CRYSTAL SEALER (manufacturer: Nikko Co., Ltd.) is applied to the surface of the material so that the surface is composed like Lithia (lithium aluminum mineral) glass, even at a maximum temperature of 1,300°C. By forming a film that does not cause decomposition or dissolution, the flame-retardant material combined with wood and cement is transformed into a non-combustible material, so it does not emit toxic gas in case of fire and is a non-combustible interior panel using sawdust and wood chips with excellent heat resistance. To provide a manufacturing method.

In order to achieve the above object, the present invention comprises the steps of preparing an additive obtained by diluting an aqueous aluminum sulfate solution in water; Preparing a wood material composed of a mixture of sawdust and wood chips; Putting the wood material into an additive and immersing it for 10 minutes at a temperature of 65°C to 80°C; And the method of manufacturing a non-combustible interior panel using sawdust and wood chips comprising the steps of mixing cement with a stirrer and forming a panel by vibration and compression in a state where the moisture content of the wood material is 75 to 80%. have.

In addition, the present invention is characterized in a method for manufacturing a non-combustible interior panel using sawdust and wood chips in which the additive is diluted in 98% by weight of an aqueous solution of aluminum sulfate 8% by weight.

In addition, the present invention is characterized in a method for manufacturing a non-combustible interior panel using sawdust and wood chips in which the mixing ratio of the wood material and cement is 72 to 78 wt% of the wood material and 22 to 28 wt% of the cement.

In addition, the present invention is characterized in a method for manufacturing a non-combustible interior panel using sawdust and wood chips further comprising the step of applying a non-combustible coating material to the surface of the molded panel in the step of forming the panel.

In addition, the present invention is characterized by a method for manufacturing a non-combustible interior panel using sawdust and wood chips, in which the non-combustible coating material is a crystal sealer.

The non-combustible interior panel manufactured by the method of the present invention is a material combined with sawdust, wood chips, and cement, and has excellent thermal insulation and sound absorption properties unique to wood components, and is easy to cut or face as wood processing tools such as saws and planers. . In addition, when bonding the non-combustible interior panel of the present invention to the inner wall formed of existing bricks and blocks of a building, it is easy to attach only by applying mortar to the inner wall adhesive surface. It has the effect of creating an indoor atmosphere.

In addition, the present invention prepares a panel having flame resistance and flame retardancy by immersing a wood material in an aqueous aluminum sulfate solution, and then applies a non-combustible coating material such as a crystal sealer to the surface of the panel. , It forms a film on the surface and maintains its appearance with self-hardening properties that harden with drying by combining the original porous wood material and cement. Due to its non-dissolution property, it can be manufactured as non-combustible interior and exterior materials and partitions, and has the effect of improving product value according to surface treatment techniques.

In addition, the crystal sealer applied as a coating material in the present invention is a glass component containing SiO2 as a main component, obtained by pulverizing quartz of natural stone into particles of 5-7㎛ using nano and biotechnology, and then applying appropriate temperature and pressure to liquefy it. As an inorganic material that forms a glass film at room temperature, the properties of glass are utilized as a coating material. Therefore, the main raw material is quartz, and as an inorganic eco-friendly paint containing alcohol and 30 kinds of enzymes, the photocatalytic effect of the sun is recognized and it has a pollution-resistance function. It is excellent in that it blocks the initial explosion phenomenon in case of fire only by applying the surface, and it is characterized by excellent fire-fighting and non-combustible effect.

In particular, wood material itself has a large specific heat, low thermal conductivity, and no clear melting point. On the other hand, when a fire is ignited, a carbonized layer is formed immediately to slow the flammable combustion and suppress heat transfer to the inside of the material. is the material Therefore, if you use properties such as blocking the supply of heat or oxygen by compounding or coating with various incombustible materials such as cement and crystal sealer, and causing chemical reactions with drugs such as phosphorus, fluorine, boron, and alkali metals. The fire protection performance is further improved.

The non-combustible interior panel pursued by the present invention has a lower heat transfer rate than any other building materials including concrete and is a material with a large volumetric specific heat. It is the best building material for It is composed of cellulose and hemicellulose, which occupy more than 70% of the wood cell wall, in which water molecules can move in and out at any time. This is because when wet, it absorbs water molecules up to 30% of the weight of the wood and lowers the relative humidity.

1 is a block diagram showing a manufacturing process of a non-combustible interior panel using sawdust and wood chips according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings. 1 is a block diagram showing a method for manufacturing a non-combustible interior panel using sawdust and wood chips according to the present invention. It consists of a step of preparing a wood material (S2), a step of immersing the wood material in an additive (S3), and a step of forming a panel by mixing the wood material immersed in the additive with cement (S4).

First, the step (S1) of preparing the additive is made by mixing and diluting 8% by weight of an aluminum sulfate aqueous solution and 98% by weight of water, and the aluminum sulfate is a material used as a foam extinguishing agent, It is used to induce flame resistance during manufacturing.

Next, the step of preparing the wood material (S2) is made by crushing sawdust and wood chips to a size of 5 to 25 mm and mixing sawdust and wood chips in a ratio of 2:8.

Subsequently, the step (S3) of immersing the wood material in the additive is made by putting the wood material in the additive and immersing it, and it is preferable to immerse the wood material in the additive for 10 minutes at 65-80° C., which has a relatively high penetration of the additive.

Next, in the step (S4) of mixing the wood material with cement to form the panel, the cement and the stirrer are mixed with the wood material immersed in the additive in a state where the moisture content of the wood material is 75 to 80%, and then formed by vibration and compression method. At this time, it is preferable to mix in a ratio of 72 to 78% by weight of wood material and 22 to 28% by weight of cement. , Conversely, when a lot of cement is mixed, the strength is improved, but the sound absorption is lowered.

In addition, the present invention further comprises the step of applying a non-combustible coating material to the surface of the panel manufactured as described above.

The coating material is, for example, an inorganic crystal sealer (CRYSTAL SEALER) (manufacturer: Nikko Japan Patent No. 1991554) is preferable. By applying and impregnating the non-combustible coating material on the surface, it is possible to form a film that does not cause decomposition or dissolution even at a maximum of 1,300 ° C. In case of fire, it does not emit toxic gas and can manufacture non-combustible interior panels with excellent heat resistance.

<Example 1>

Prepare the additive by diluting 8% by weight of aluminum sulfate aqueous solution in 98% by weight of water, crushing sawdust and wood chips to a size of 15 mm each, mixing a wood material in a ratio of 2:8 into the additive, and adding it to the additive at 65~80℃ After being immersed for 10 minutes in the A panel was manufactured by applying a crystal sealer, which is a non-combustible coating material.

<Example 2>

In Example 1, only the mixing ratio of the wood material and cement was changed to 72 wt% of the wood material and 28 wt% of the cement, and the rest was the same to prepare a panel having a thickness of 3.5 cm.

<Example 3>

In Example 1, only the mixing ratio of the wood material and the cement was changed to 78 wt% of the wood material and 22 wt% of the cement, and the rest was the same to prepare a panel having a thickness of 3.5 cm.

<Comparative Example 1>

In Example 1, only the mixing ratio of the wood material and the cement was changed to 70 wt% of the wood material and 30 wt% of the cement, and the rest was the same to prepare a panel having a thickness of 3.5 cm.

<Comparative Example 2>

In Example 1, only the mixing ratio of the wood material and cement was changed to 80% by weight of the wood material and 20% by weight of the cement, and the rest was the same to prepare a panel having a thickness of 3.5cm.

item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Conventional example 1 Conventional example 2 importance
kg/m3 522 548 483 561 470 610 500 heat conduction resistance
㎡ K/W 2.14 2.08 2.20 1.87 2.46 0.069 0.33 thermal conductivity coefficient
W/(㎡/K) 0.467 0.486 0.449 0.492 0.426 - - thermal conductivity
W/(MK) 0.144 0.148 0.138 0.152 0.121 0.25 0.15 compressive strength
KN/㎡ 90 92 82 62 93 59 91 tensile strength
KN/㎡ 90 93 85 63 95 61 92 breaking strength
KN/M 700 720 560 750 500 650 600 sound absorption
(center frequency
1000Hz) 55 dB
(Nighttime
40 dB) 60dB
(Nighttime
45 dB) 53 dB
(Nighttime
42 dB) 63 dB
(Nighttime
47 dB) 48 dB
(Nighttime
35 dB) 58 dB
(Nighttime
43 dB) 65 dB
(Nighttime
56 dB)

<Based on panel thickness 3.5cm>

The above table shows the characteristics of the panels prepared according to Examples 1, 2, 3 and Comparative Examples 1 and 2 of the present invention, and the panels prepared according to Conventional Examples 1 and 2, respectively, and Conventional Example 1 is a seed-shaped stud. (C-STUD) is a panel manufactured by compression molding of a fire resistant structure with 15T fire-resistant gypsum board and 9T fiber-reinforced cement board (Vista Board) installed on both sides of (C-STUD). It is a panel manufactured by integral molding with lightweight foamed concrete using raw material.

As shown in the table, the wood material is immersed in an additive diluted with 98% by weight of an aqueous aluminum sulfate solution of 8% by weight in 98% by weight of water. Examples 1 to 3 of the invention, the compressive strength, tensile strength and breaking strength were superior to that of Conventional Example 1 and equivalent to Conventional Example 2, and in sound absorption, it was superior to Conventional Example 2 and equivalent to Conventional Example 1. Overall, both strength and sound absorption were found to have good properties, and among Examples 1 to 3, the properties of Example 1, which were set to 75% by weight of wood material and 25% by weight of cement, were generally the best.

On the other hand, the panel manufactured by the manufacturing method of Comparative Example 1, which was set to 70% by weight of wood material and 30% by weight of cement, had good strength as the mixing amount of cement increased compared to Examples 1 to 3, but the sound absorption was lowered. In the case of Comparative Example 2, which was set to 80% by weight of the wood material and 20% by weight of the cement, as the mixing amount of the wood material increased than in Examples 1 to 3, the sound absorption property was good, but the strength was weak.

In addition, the panels manufactured by the manufacturing methods of Examples 1 to 3 of the present invention are coated with a non-combustible coating material, crystal sealer, on the surface, and an additive containing an aqueous aluminum sulfate solution is added when mixing the wood material and cement. By applying a crystal sealer on the surface of the panel to which flame resistance is added to induce flame resistance, the flame-retardant material is changed to a non-combustible material, and the interior panel with built-in wood cement can be used as a non-combustible material.

item crystal sealer hyper coat Exterior transparent transparent gloss Mohs hardness 5.2 - flash point No flammability flammable substances toxicity None, no skin damage - immersion figure 0.93 x 10-9 cm/sec 4.96 x 10-9 cm/sec heat resistant temperature 1000~1300℃ 300~700℃ when applied
material preheat not needed 40~60℃ Hardening room temperature natural curing heat hardening
(150℃-30min, 250℃-15min)

In other words, as in the above characteristic comparison table, in the comparison of the crystal sealer and the heat-resistant ceramic nano-coating material, Hypercoat, the crystal sealer is more than twice as high at the heat-resistant temperature, so flame resistance is added in case of fire, so the effect of changing the panel from flame-retardant material to non-combustible material In the case of crystal sealer, material preheating is not required when applying, and compared to natural curing at room temperature, hypercoat requires material preheating at 40-60°C when applied, and heated at 150°C-30 minutes and 250°C-15 minutes after application Since it has to go through a hardening process, there is a disadvantage in that the construction cost is high and economical efficiency is lowered.

The embodiments described so far have merely described preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and those skilled in the art within the spirit and claims of the present invention It should be understood that various changes, modifications or substitutions will be possible, and such embodiments fall within the scope of the present invention.

Claims (5)

preparing an additive obtained by diluting an aqueous aluminum sulfate solution in water;
Preparing a wood material composed of a mixture of sawdust and wood chips;
Putting the wood material into an additive and immersing it for 10 minutes at a temperature of 65°C to 80°C; and
Method for manufacturing a non-combustible interior panel using sawdust and wood chips, characterized in that it comprises the step of mixing cement with a stirrer in a state where the moisture content of the wood material is 75-80% and forming the panel by vibration and compression method .
According to claim 1, wherein the additive,
A method for manufacturing a non-combustible interior panel using sawdust and wood chips, characterized in that it is made by diluting 8% by weight of aluminum sulfate aqueous solution in 98% by weight of water.
The method of claim 2, wherein the mixing ratio of the wood material and cement is 72 to 78 wt% of the wood material and 22 to 28 wt% of the cement.
[4] The non-combustible interior using sawdust and wood chips according to any one of claims 1 to 3, further comprising the step of applying a non-combustible coating material to the surface of the molded panel in the step of forming the panel. A method for manufacturing a panel.
[Claim 5] The method of claim 4, wherein the non-combustible coating material is a crystal sealer.

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