JPH09132474A - Board capable of absorbing sound and conditioning humidity and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board capable of absorbing sound and conditioning humidity, which absorbs and desorbs moisture almost in an equivalent amt., with the attenuation minimized, capable of everlastingly repeating absorption and desorption of moisture, capable of stably conditioning humidity with high efficiency and also excellent in sound absorptivity. SOLUTION: This inorg. board consists of, by weight, 10-30% crushed diatomaceous earth, 5-15% metal powder, 25-65% water glass, 10-30% silicon and 2-8% cement and has a large number of open cells formed by foaming. In this case, the crushed diatomaceous earth is the one exhibiting the maximum pore capacity at 20-100Å pore diameters. Further, an inorg. composite board is formed by joining the inorg. board and a foamed aluminum sheet together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material having a sound absorbing ability and a humidity controlling ability, which is used as a wall material in various buildings and exerts an excellent function of maintaining quietness and comfort of an indoor environment. It also relates to a method for manufacturing this plate material.

[0002]

2. Description of the Related Art Fireproof properties, heat insulating properties and humidity controllability are required for interior materials of buildings, and in order to meet these requirements, inorganic porous materials such as foamed cement boards and humidity control boards have been conventionally used. Material is used. Typical prior arts relating to this type of porous plate material are disclosed, for example, in Japanese Patent Application Laid-Open No. 1-230456 (conventional example 1) and Japanese Patent Publication No. 6-49131 (conventional example 2).

In the conventional example 1, the main body is a gypsum board,
At least one of an inorganic moisture absorbing / releasing additive and an organic moisture absorbing / releasing additive is blended as a blending component in the board, and the board surface absorbs and absorbs in addition to this blending. The present invention relates to a moisture absorptive and desorptive gypsum board coated with a wet coating film or wallpaper, and Conventional Example 2 is an inorganic solidified body obtained by binding and solidifying an inorganic foam with an inorganic binder mainly composed of alkali metal silicate, The present invention relates to an inorganic humidity conditioner in which sodium glycolate having water absorption inside is generated.

[0004]

In the case of the moisture absorptive and desorptive gypsum board of Conventional Example 1, when it is used as an indoor wall material, it is possible to adjust the indoor humidity to some extent by the moisture absorptive and desorptive performance of the gypsum board. However, there is a problem that the moisture absorption / desorption amount is generally small and the moisture absorption / desorption rate is slow, and as a result, the humidity control performance is low. Regarding this point, as shown by the experimental results in JP-A-1-230456, the moisture absorption (g / m ² )
Is 139 to 399 and the amount of moisture released (g / m ² ) is 114 to 344, which has been confirmed by a follow-up experiment conducted by the applicant, but the amount of released moisture is particularly lower than the amount of absorbed moisture. , To maintain a constant humidity in the room, another humidity control device must be used together. Further, this moisture absorptive and desorptive gypsum board has a problem that the sound absorbing performance is also low.

On the other hand, as described in Japanese Patent Publication No. 6-49131, the inorganic humidity conditioner of Conventional Example 2 has, for example, a moisture absorption amount (g / m ² ) of 280 and a moisture release amount (g / m ² ). Since m ² ) is 190 and the moisture absorption / release performance is almost the same as that of Conventional Example 1, both the humidity control ability and the sound absorbing ability have the same problems as in Conventional Example 1.

The present invention has been made in order to solve the above problems, and an object of the present invention is to absorb moisture and to release moisture in substantially equal amounts, with extremely small attenuation and constant capability. Provide a sound absorbing / humidifying plate and a manufacturing method thereof that can repeat moisture absorption / desorption permanently, exhibit high efficiency and stable humidity adjusting performance, and also have excellent sound absorbing performance To do.

[0007]

The present invention has the following configuration to achieve the above object. That is, the present invention is, by weight%, diatomaceous earth pulverized product: 10 to 30,
Metal powder: 5-15, water glass: 25-65, silicon:
10 to 30 and cement: 2 to 8, which is an inorganic plate body having a large number of continuous ventilation holes formed by a foam molding means, wherein the diatomaceous earth pulverized product has a powder pore radius of 20. It is a plate material having a sound absorbing ability and a humidity controlling ability, which is characterized by being a diatomaceous earth having a characteristic of exhibiting a maximum pore volume in the range of up to 100Å.

The present invention also provides, in weight percent, diatomaceous earth grinds:
10-30, metal powder: 5-15, water glass: 25-6
5, an inorganic plate body containing five components of silicon: 10 to 30 and cement: 2 to 8 and having a large number of continuous air holes formed by a foam molding means, and a plate body made of foamed aluminum are bonded together. In the formed inorganic composite plate, the diatomaceous earth pulverized product has a powder pore radius of 20 to 10
It is a plate material having a sound absorbing ability and a humidity controlling ability, which is characterized by being a diatomaceous earth having a characteristic of exhibiting the maximum pore volume at 0Å.

The present invention is also a method for producing a plate material having a sound absorbing ability and a humidity adjusting ability, wherein the pore radius of the powder is 20% by weight.
10 to 30 of diatomaceous earth pulverized product having characteristics of maximum pore volume at -100 Å, metal powder of 5 to 15 and water glass of 25
To 65, silicon 10 to 30, and cement 2 to 8 are uniformly stirred, and molded and cured while foaming in a mold having a predetermined shape to form an inorganic material having a large number of continuous ventilation holes. Is manufactured.

The present invention is also a method of manufacturing a plate material having a sound absorbing ability and a humidity controlling ability, in which a plate body made of foamed aluminum is preliminarily placed on the inner bottom of a mold having a predetermined shape, and a fine powder of powder is used in weight%. 10 to 30 diatomaceous earth crushed product having characteristics showing maximum pore volume when pore radius is 20 to 100 Å, metal powder 5 to 15, water glass 25 to 65, silicon 10 to 30, cement 2 to 8 By uniformly agitating the compounded mixture prepared in step 1, and molding and curing while foaming in the mold, an inorganic plate having a large number of continuous ventilation holes is formed by adhering to the plate made of foamed aluminum. The method is characterized by producing an inorganic composite plate body.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. A plate material (hereinafter, referred to as a sound absorbing / humidifying plate material) 1A having sound absorbing ability / humidity adjusting ability according to claim 1 of the present invention.
Is a diatomaceous earth pulverized product, metal powder, water glass, silicon and cement, and is formed into an inorganic plate body 2 having a large number of communicating holes by a foam molding means which is carried out in a foaming mold of a predetermined shape. (See FIG. 1A).

In the sound absorbing / humidifying plate 1B according to claim 2 of the present invention, the aluminum foam plate 3 is previously placed on the inner bottom of a foaming mold having a predetermined shape, and the same as described in the preceding paragraph. By means of, diatomaceous earth crushed product, metal powder, water glass,
When a mixture containing five components of silicon and cement is foam-molded in this foaming mold, the inorganic plate body 2 is integrally attached in a state of biting into the uneven portion of the foamed aluminum plate body 3 to form an inorganic composite. A sound absorbing / humidifying plate 1B made of a plate is formed (see FIG. 1B).

The sound absorbing / humidifying plate materials 1A and 1B thus obtained are inorganic, lightweight and have mechanical strength as a wall material and excellent moisture absorbing / releasing performance and sound absorbing performance. These characteristics are exhibited as expected by dispersing the diatomaceous earth pulverized product as a filler in the continuous porous foamed inorganic plate body 2. By using a composite plate body together with the aluminum plate body 3, it is possible to further enhance the performance. As the diatomaceous earth pulverized product used in this case, as a result of various studies and experiments conducted by the present inventors, a Wakkanai layer siliceous shale having the following characteristics is preferable. The specific surface area is 110 m ² / g or more, which is 3 to 4 times that of general diatomaceous earth.
It is twice as large. The distribution of pores is shown in FIG. 2, and pores having a radius of 20 to 100Å, which are considered to contribute to the humidity control function, account for 70% or more of the whole. The size of the specific surface area indicates the number of minute voids. From the above, the Wakkanai layer siliceous shale is extremely porous and exhibits a unique pore distribution. FIG.
Shows the water vapor adsorption isotherm of this powder at 20 ° C. and also shows the diatomaceous mudstone of the voice layer as a comparative material. The Wakkanai layer siliceous shale shows a large equilibrium adsorption amount at a vapor pressure of 0.5 to 1 as compared with the comparative material, indicating that it is suitable as a humidity control material. Considering the workability, it is desirable to grind the Wakkanai layer siliceous shale having such characteristics and use it as a powder of 1 mm or less. In addition, 600 to 1 of this powder
By heat-treating at 000 ° C. for about 1 hour, the coloring in the product becomes easy and the mechanical strength is further increased.

By the way, when foaming the inorganic plate 2, the diatomaceous earth pulverized product is 10 to 30, the metal powder is 5 to 15, the water glass is 25 to 65, and the silicon is 10 by weight.
By using a mixture containing -30 and cement in a ratio of 2-8 as the foaming raw material, a sound absorbing / humidifying plate material having excellent mechanical strength, moisture absorbing / releasing performance, and sound absorbing performance can be obtained. Here, the reason for limiting the mixed components will be described below. Diatomaceous earth pulverized product: The diatomaceous earth pulverized product has an effect on the moisture absorption / release function and is an effective component for enhancing the humidity control ability. However, in this case, if it is less than 10% (weight%, the same as below), the humidity control property becomes poor, and if it exceeds 30%, the foaming property becomes poor and the mechanical strength becomes low. The physical quantity is in the range of 10% to 30%.

Metal powder: Metal powder is a component effective in improving foamability and mechanical strength, and aluminum powder is particularly preferable. However, in this case, if it is less than 5%, the strength is inferior, and if it exceeds 15%, the humidity control property is inferior. For the above reasons, the amount of the metal powder is in the range of 5% to 15%. Water glass: Water glass is a component required for producing a foam, and JIS-2 is preferable. But in this case,
If it is less than 25%, its effect is small and foaming is reduced, and if it exceeds 65%, the mechanical strength is lowered. For the above reasons, the amount of water glass is in the range of 25% to 65%.

Silicon: Silicon is a component required for forming a foam, like water glass, and finely powdered metallic silicon is preferred. However, in this case, if it is less than 10%, the effect is small and foaming is reduced, and if it exceeds 30%, the mechanical strength is lowered. For the above reasons, the amount of silicon is set in the range of 10% to 30%. Cement: Cement is a component effective in improving the mechanical strength of the foam, and early-strength Portland cement is preferable. However, in this case, if it is less than 2%, its effect is small and the strength is low, and if it exceeds 8%, foaming is less, and for the above reason, the cement content is set in the range of 2% to 8%.

Next, the manufacturing process according to the present invention will be described. It is well known that by blending water glass and metallic silicon or its alloy at an appropriate ratio and adding an appropriate amount of cement, curing starts while generating hydrogen gas, and a foamed cured product is obtained. Further, diatomaceous earth pulverized product (wakkanai layer siliceous shale pulverized product) and aluminum powder are added to the diatomaceous earth pulverized product in an appropriate ratio, for example, wt%: 20,
By mixing aluminum powder: 10, water glass: 45, metallic silicon: 20, cement: 5,
A foamed cured product having excellent mechanical strength, humidity control performance and sound absorption performance can be obtained.

In the case of the sound absorbing / humidifying plate 1A of the present invention, the sound absorbing / humidifying plate of the present invention contains 5 components of diatomaceous earth pulverized product, aluminum powder, water glass, metallic silicon and cement in a predetermined ratio. It is obtained by uniformly agitating the composition, and by molding and curing while foaming. When these five components are stirred, foaming occurs within a few minutes, and hydrogen gas is generated while generating heat. Therefore, if it is poured into a mold of a predetermined shape while it has fluidity before gas generation, foaming proceeds and becomes bulky, moisture evaporates and loses viscosity, and as a result, the composition rapidly cures. It becomes the inorganic plate 2. In particular, after pouring into a mold having a predetermined shape while there is fluidity before gas generation,
By warm-curing the entire mold at a temperature of 90 ° C., an exothermic reaction is promoted, and it is easy to obtain a superior foam-cured product having a large number of continuous air holes and being uniformly distributed in a short time.

On the other hand, a sound absorbing / humidifying plate 1 which is a composite plate
In the case of B, the foamed aluminum plate 3 is merely placed on the inner bottom portion of the mold having a predetermined shape into which the above-mentioned five-component mixture is poured, and otherwise the foam molding is performed by the same method as described above. As a result, the inorganic plate body 2 composed of five components and the foamed aluminum plate body 3 are strongly adhered to each other, and a proper adhesive strength as a composite material is obtained, which is a sound-absorbing composite molding.
A humidity control plate 1B is obtained.

[0020]

Embodiments of the present invention will be described below. (1) Example 1 (Sound absorption / humidity control plate 1A): Based on the composition of Table 1 below, metallic silicon (abbreviated as silicon in the table), aluminum powder (the same aluminum powder), and Wakkanai layer siliceous material The shale crushed product (diatomaceous earth, the same) and cement are thoroughly stirred in a container, and then a predetermined amount of water glass is poured into this compounding material and kneaded. The mixture is poured into a premade mold. After pouring, the mold is warmed to 80 ° C. with warm water or the like. About 10 minutes after the temperature rises, the reaction is accelerated at once and hydrogen gas and water vapor are ejected to start curing, and after a few minutes, a foam molded plate having a thickness of 10 mm is completed. In addition, Comparative Examples a and b were foam-molded in the same process as Examples A, B and C of the present invention.

[0021]

[Table 1] Note: Numbers are blending ratios expressed in wt%, numbers in parentheses are blending ratios to Example A,

(2) Example 2 (sound absorbing / humidifying plate 1B):
The foam molded plate having a thickness of 10 mm in Example 1 is foamed, molded and cured in the same manner as above on a foam aluminum plate having the same thickness to bond with the foam aluminum plate and have an adhesive strength as a composite material. A large sound absorbing / humidifying plate 1B is completed.

Each of the above Examples and Comparative Examples was used as a wall material in a laboratory, and the moisture absorption (g / m ² ) in each Example is represented by how it changes with relative humidity. As a result of investigating the time-dependent change of the moisture release amount, as shown in FIG. 4, the Wakkanai layer siliceous shale is largely responsible for the moisture absorption and release performance. Same 90
It can be seen that the moisture absorption amount and moisture release amount (%) are as high as 800 g / m ² and are stable over a long period of time.

As to the sound absorbing performance, as shown in FIG. 5, the sound absorbing / humidifying plate 1A alone shows a sufficient value, but in particular, it is a combination of the foam molded plate and the foam aluminum plate. The composite material of the sound absorbing / humidifying plate 1B has a high sound absorbing coefficient over the entire range of low frequency, medium frequency, and high frequency, which proves that it is excellent as a sound absorbing material.

[0025]

According to the present invention having the above-described structure and functioning, it is possible to provide a plate material having a humidity control function of absorbing and releasing moisture according to a change in humidity. Moreover, since there is no difference between the amount of absorbed moisture and the amount of released moisture, and since the rate of moisture absorption and release is fast, there is an excellent effect that the humidity control performance is high for a long period of time and can be stably exhibited. Furthermore, the plate material according to the present invention has sound absorbing performance, fireproofing performance, and heat insulating performance in combination, and therefore is effective when used as a wall material for living rooms where it is desired to create a comfortable environment.

[Brief description of the drawings]

FIG. 1 is a partial sectional view schematically showing a sound absorbing / humidifying plate according to the present invention.

FIG. 2 is a bar graph diagram showing pore distributions of a Wakkanai layer siliceous shale, which is a raw material of a diatomaceous earth pulverized product according to the present invention, without firing and after firing at 800 ° C.

[Fig. 3] 20 ° C of the Wakkanai siliceous shale and the voiced diatomaceous mudstone
Is the water vapor adsorption isotherm in FIG.

FIG. 4 is a diagram showing a time-dependent change in moisture absorption / desorption amount in the sound absorbing / humidifying plate material according to the present invention.

FIG. 5 is a diagram showing a relationship of frequency and sound absorption coefficient in the sound absorbing / humidifying plate material according to the present invention.

[Explanation of symbols]

 1A ... Sound absorbing / humidifying plate 1B ... Sound absorbing / humidifying plate 2 ... Inorganic plate 3 ... Foamed aluminum plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location E04B 1/86 E04B 1/86 C (71) Applicant 595155912 ▲ Kichi Yoshida Atsubetsu-ku, Sapporo, Hokkaido Atsubetsu Higashi 4-7-18-11 (72) Inventor Fusushi Nakamoto 10-10 Nakahama-cho, Amagasaki-shi 1 Shinko Steel Wire Industrial Co., Ltd. (72) Inventor Tadahiko Takada 21-63, Nopporo Yoyogi-cho, Ebetsu-shi, Hokkaido ( 72) Inventor Takafumi Nomura 1 of 2 Suehiro-cho, Nopporo, Ebetsu-shi, Hokkaido (72) Inventor ▲ Kenji Yoshita Atsobe-ku, Sapporo, Hokkaido

Claims (4)

[Claims] 1. A diatomaceous earth pulverized product in an amount of 10% by weight: 10 to 30,
Metal powder: 5-15, water glass: 25-65, silicon:
10 to 30 and cement: 2 to 8, which is an inorganic plate body having a large number of continuous ventilation holes formed by a foam molding means, wherein the diatomaceous earth pulverized product has a powder pore radius of 20. A plate material having a sound absorbing ability and a humidity controlling ability, which is diatomaceous earth having a characteristic of exhibiting a maximum pore volume in the range of up to 100Å. 2. A diatomaceous earth pulverized product in an amount of 10 to 30% by weight,
Metal powder: 5-15, water glass: 25-65, silicon:
10 to 30 and cement: 2 to 8 including 5 components, an inorganic plate body having a large number of continuous ventilation holes formed by foam molding means, and an inorganic plate body formed by adhering a plate body made of foamed aluminum The plate material having sound absorption and humidity control characteristics, wherein the diatomaceous earth pulverized product is a diatomaceous earth having a characteristic that it exhibits a maximum pore volume when the pore radius of the powder is 20 to 100 liters. . 3. The powder has a pore radius of 20 to 10 by weight.
10 to 30 diatomaceous earth pulverized products having characteristics of showing the maximum pore volume at 0Å, metal powder 5 to 15 and water glass 25 to 6
5, a mixture of 10 to 30 of silicon and 2 to 8 of cement is uniformly stirred and molded and cured while foaming in a mold of a predetermined shape to form an inorganic material having a large number of continuous air holes. A method of manufacturing a plate material having a sound absorbing ability and a humidity controlling ability, which comprises manufacturing a plate body. 4. A diatomaceous earth pulverized product having a characteristic that a plate body made of foamed aluminum is previously set on the inner bottom of a mold of a predetermined shape, and exhibits a maximum pore volume in weight% when the pore radius of the powder is 20 to 100Å. 10 to 30, metal powder 5 to 15, water glass 25 to 65, silicon 10 to 30, cement 2 to
The mixture prepared in a ratio of 8 is uniformly stirred, and is molded and cured while being foamed in the mold to bond an inorganic plate body having a large number of continuous ventilation holes to the plate body made of foamed aluminum. A method for producing a plate material having a sound-absorbing ability and a humidity-controlling ability, the method comprising the steps of: