JP2002255615A - Building material provided with moisture conditioning property and production process of the same building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight building material having moisture conditioning properties which is excellent in moisture absorption/release property, fire- proof property, fire resistance, machinability, dimensional stability and property with respect to nailing. SOLUTION: This building material consists of 5-30 wt.% diatomaceous earth having 2-100 μm grain size and the remainder of an inorganic material and organic reinforcing fiber and/or inorganic fiber and is produced by a papermaking method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-controllable building material having a moisture absorbing / releasing performance, which can be used as a building material such as a ceiling material, an interior / exterior material, and a floor material, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, in the construction of houses and the like, an architectural style in which an earth wall structure and wood or a wood-based building material obtained by processing the same are applied has been adopted for a long time. A house having such a structure has an excellent function of preventing the occurrence of dew condensation and extreme drying in a living space due to the excellent moisture absorbing and releasing ability of the earth wall and the woody material.

However, in recent years, it has become difficult to obtain good-quality wood-based resources due to a decrease in wood-based resources, and prices have continued to rise. On the other hand, wood-based building materials are inflammable materials and have the drawback that they are easily attacked by vermin such as termites, and are liable to cause corrosion.

[0004] On the other hand, the earth wall structure has hardly been adopted due to the fact that the number of skilled and highly skilled workers has become extremely small and labor costs have risen.

[0005]

In recent years, houses and the like have been pursued with a structure that is highly airtight and highly heat-insulating.
Moisture generated indoors cannot diffuse to the outside and dew condensation occurs throughout the room, causing wetting and stains, and causing problems such as mites and molds. In order to solve such a problem, it is strongly desired to provide a building material such as a board having excellent moisture absorption / release properties.

[0006] The present invention provides moisture absorption / desorption properties, fire resistance, fire resistance,
It is an object of the present invention to provide a lightweight, moisture-controllable building material having excellent machinability, dimensional stability, and nailing characteristics.

[0007]

According to the first aspect of the present invention, there is provided an image forming apparatus having a particle size of 2 μm to 100 μm.
Diatomaceous earth in the range of: comprising 5% to 30% by weight,
The balance is a humidity-controllable building material made of an inorganic material, one or both of an organic reinforcing fiber and an inorganic fiber, and obtained by a papermaking method.

The invention according to claim 2 is characterized in that, by weight, gypsum dihydrate: 2% to 30%, hydraulic substance: 15% to 60%, diatomaceous earth having a particle size in the range of 2 μm to 100 μm: 5% by weight
-30% by weight, perlite: 5% to 15%, organic reinforcing fiber: 3% to 5%, and inorganic fiber: 1% to 8%, or both, and is a humidity control building material obtained by a papermaking method. .

According to a third aspect of the present invention, there is provided, by weight, a cement: 30% to 50%, a pearlite: 5% to 20%, an inorganic mixed material: 10% to 30%, and a particle size of 2 μm to 100 μm.
Diatomaceous earth within the range of m: 5% to 30% by weight, organic reinforcing fiber: 3% to 13%, and inorganic fiber: 4% to 8%
%, And is a humidity control building material obtained by a papermaking method.

The invention according to claim 4 is that, by weight, gypsum dihydrate: 20% to 50%, slag: 20% to 50%, inorganic admixture: 5% to 15%, inorganic fiber: 4% to 8% %, Diatomaceous earth having a particle size in the range of 2 μm to 100 μm: 5% by weight
~ 30% by weight, organic reinforcing fiber: 3% ~ 5%,
It is a humidity control building material obtained by the papermaking method.

[0011] According to a fifth aspect of the present invention, there is provided an asbestos by weight:
10% to 30%, cement: 30% to 70%, inorganic admixture: 8% to 12%, diatomaceous earth having a particle size in the range of 2 μm to 100 μm: 5% to 30% by weight, organic reinforcing fiber: 3% It is a moisture-controllable building material consisting of up to 5% and obtained by a papermaking method.

[0012] The invention according to claim 6 is a method for producing asbestos by weight:
2% to 6%, slag: 20% to 40%, gypsum: 20% to
60%, diatomaceous earth having a particle size in the range of 2 μm to 100 μm: 5% to 30%, organic reinforcing fiber: 3% to 5%, and inorganic fiber: 1% to 3%, or both, and a papermaking method It is a humidity control building material obtained by:

The invention according to claim 7 is characterized in that, by weight, lime:
15% to 50%, silica: 15% to 50%, particle size 2 μm
Diatomaceous earth within the range of １００100 μm: 5% to 30% by weight, organic reinforcing fiber: 3% to 5%, and inorganic fiber:
It is a moisture-controllable building material made of any one or both of 1% to 8% and obtained by a papermaking method.

The invention according to claim 8 has a particle size of 2 μm or less.
Diatomaceous earth within the range of 100 μm: 5 to 30% by weight, the remainder being made of a mixed slurry of water and a raw material composed of an inorganic material and one or both of an organic reinforcing fiber and an inorganic fiber and water. A method for producing a humidity-controllable building material, characterized in that the material is cured and dried after being made thick.

[0015]

Since the present invention has the above-described structure, it is possible to provide a light-weight moisture-controllable building material having excellent moisture absorption / desorption characteristics and also excellent fire resistance, fire resistance and nailing characteristics. In addition, since the humidity-controlling building material of the present invention is manufactured by a papermaking method, it is possible to manufacture a building material (board or the like) having a uniform specific gravity without unevenness in specific gravity, and bleeding of a powder slurry (sedimentation of solid components, Separation, separation of mixed water) does not occur.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on preferred embodiments.

The humidity control building material of the present invention has a particle size of 2 μm to 1 μm.
Diatomaceous earth in the range of 00 μm: 5% to 30% by weight
In addition, one or both of organic reinforcing fibers and inorganic fibers are used as essential components. This essential component is combined with a cement as a mineral substance, a hydraulic substance such as cement, slag, etc., as well as a pearlite as a lightweight aggregate, mixed with water to form a slurry, which is then sheeted to obtain a plate-like material, which is then steam-cured. The process of drying into a product gives the moisture-controllable building material of the present invention.

[0018]

[Embodiment 1] This embodiment is a humidity control building material having the component system according to claim 2. Hereinafter, the component system of the humidity control building material of this embodiment will be described.

Gypsum has fire-resistance and fire-resistance, has a small amount of expansion and contraction caused by a temperature change, and has the advantages of being easily hardened and molded. Gypsum has long been used as a fire-resistant material and a fire-resistant material. However, gypsum alone has drawbacks of low bending strength and weak screw-nail holding power, even if it has primary physical properties. In the present invention, this disadvantage is complemented by the addition of a hydraulic substance. Gypsum is added by weight (hereinafter the same) 2% to 30%. Gypsum also has the effect of accelerating the hydration of hydraulic materials such as slag and cement. With less than 2% added,
It is difficult to exhibit the effect of addition. On the other hand, if it is added in excess of 30%, the strength imparting ability of a hydraulic substance such as slag and cement and the properties such as waterproofness, curability and moldability are reduced. In addition, the primary physical properties decrease bending strength and screw nail holding power.

Hydraulic substances such as slag and cement are:
By blending this, the matrix is firmly adhered to increase the strength of the humidity control building material, and properties such as curing and molding can be imparted easily and inexpensively, thereby facilitating the production of the humidity control building material (board base material). Also, the hydraulic substance is
Fireproof, fireproof and waterproof. In this embodiment, it is added in the range of 15% to 60%. 1
If the addition amount is less than 5%, it is difficult to exhibit strength imparting ability, waterproofness, curability, and moldability. On the other hand, if more than 60% is added,
It causes cracks due to weight increase, drying and shrinkage of the humidity control building material.

Diatomaceous earth is added in order to impart moisture absorbing / releasing ability to the humidity control building material. In this embodiment, 5% to 30
%. If the amount is less than 5%, the desired moisture absorbing and releasing ability cannot be imparted to the humidity control building material. On the other hand, 30
%, The hardness and flexural strength of primary components of the humidity control building material are reduced.

In the present invention, the particle size of the diatomaceous earth is 2 mμ.
It is limited to the range of １００100 μm. If the particle size is less than 2 μm, the ability to absorb and release moisture cannot be exhibited. On the other hand, when the particle size exceeds 100 μm, when the slurry is taken up by a paper machine, diatomaceous earth particles cannot be separated to form a uniform mat, but also the design is impaired. Usually, the particle size is ≦ 70 μm. The particle size range of the diatomaceous earth is preferably 10 μm to 50 μm.
m.

In the present invention, in addition to diatomaceous earth, silica gel, zeolite, or the like having a limited particle size range can be used as a substance for imparting moisture absorbing / releasing ability to the humidity control building material.

Perlite is added to increase the fire resistance and to reduce the weight of the humidity control building material as a lightweight aggregate. In this embodiment, it is added within the range of 5% to 15%. 5
If the addition amount is less than 10%, the contribution to the improvement of the fire resistance and the weight reduction of the humidity control building material is small.
Impairs the balance of moisture absorption and release properties of moisture-regulating building materials and primary physical properties.

For example, pulp is added as an organic reinforcing fiber for improving the strength of the humidity control building material. In this embodiment, it is added within a range of 3% to 5%. If the amount is less than 3%, the effect of improving the strength and workability of the humidity control building material cannot be exhibited. On the other hand, if the amount exceeds 5%, the pulp loses its properties as a non-combustible material from the place where the pulp is an organic material. As the organic reinforcing fiber, vinylon or the like can be used in addition to pulp.

As with the organic reinforcing fibers, inorganic fibers such as glass fibers and rock wool are added to improve the strength of the humidity control building material and the processability. In this embodiment, it is added in the range of 1% to 8%. If the addition amount is less than 1%, the effect of improving the strength is small. If the addition amount exceeds 8%, the kneading work of the raw material and water is hindered. Impairs the uniformity of the material. In this embodiment, one or both of organic reinforcing fibers and inorganic fibers are added.

In the present invention, calcium carbonate, mica, and slaked lime are each used as an extender in addition to 0% to 15%.
%, 1% to 8%, and 1% to 1.5%.

[0028]

[Embodiment 2] This embodiment is a humidity control building material having the component system according to claim 3. In this embodiment,
30% to 50% cement by weight as hydraulic material
Has been blended. The hydraulic substance is blended to increase the strength of the humidity control building material. From this viewpoint, at least 30% is blended. On the other hand, if it is added in excess of 50%, the moisture-controllable building material will increase in weight and crack due to drying and shrinkage.

In this embodiment, 4 to 8% of inorganic fiber is contained by weight. Glass fibers, rock wool, asbestos, and the like can be used as the inorganic fibers. If the amount is less than 4%, the reinforcing effect cannot be exhibited.
On the other hand, if added in excess of 8%, it hinders the kneading operation of the raw material and water, and further, fiber aggregates called lumps coexist and impair the uniformity of the material of the humidity control building material.

Perlite is added to increase the fire resistance and to reduce the weight of the humidity control building material as a lightweight aggregate. In this embodiment, it is added within the range of 10% to 20%.
If the amount added is less than 10%, the contribution to the improvement of the fire resistance and the weight reduction of the humidity control building material is small. On the other hand, if it exceeds 20%, the balance between the moisture absorption / release properties and the primary physical properties of the humidity control building material is impaired.

The inorganic mixed material is added in an amount of 10% to 30%. As the inorganic mixed material, slag powder, fly ash, serpentine, quartzite powder and the like can be used. In order to keep the CaO / SiO ₂ ratio in an appropriate range, the amount of the inorganic mixed material is set to 1 in relation to the amount of cement.
The range is 0% to 30%. Outside of this range, the bending strength of the humidity control building material is reduced.

In this embodiment, the organic reinforcing fiber is added in the range of 3 to 13% for the purpose of increasing the strength of the humidity control building material and improving the papermaking property of the slurry comprising the raw material and water. Pulp, vinylon fiber and the like can be used as the organic fiber. If the addition amount is less than 3%, the effect of addition cannot be exhibited. If the addition amount exceeds 13%, the property of the humidity control building material as a non-combustible material is lost. In this embodiment, one or both of the inorganic fiber and the organic reinforcing fiber are added.

[0033]

[Embodiment 3] This embodiment is a humidity control building material having the component system according to claim 4. In this embodiment,
In addition to the essential components, the following components, that is, 20% to 50% by weight of gypsum dihydrate are blended. Gypsum is added in order to provide fireproof and fire resistance to the humidity control building material. Gypsum can provide properties such as hardening and molding simply and at low cost.
Add at least 20% for this purpose. However, an addition amount exceeding 50% lowers the hardness and bending strength of the primary physical properties of the humidity control building material.

The slag has at least two hydraulic components.
0% is added. However, if added over 50%,
It causes cracks due to weight increase, drying and shrinkage of the humidity control building material.

The inorganic admixture is added as an additive for improving drainage within a range of 5% to 15%. As the inorganic admixture, silica, calcium carbonate, and the like can be used. If the addition amount is less than 5%, the effect of improving the papermaking moldability cannot be exhibited, and if the addition amount exceeds 15%,
The water absorption of the humidity control building material becomes excessive, resulting in a decrease in performance.

Inorganic fibers such as glass fibers and rock wool are added together with organic reinforcing fibers such as pulp and vinylon fibers to improve the strength of the humidity control building material, and are added in an amount of 4% to 8% in order to improve workability. You. If the addition amount is less than 4%, the addition effect will not be exhibited, and if added more than 8%, it will hinder the kneading operation of the raw material and water. Impair uniformity.

The organic reinforcing fiber is added in an amount of 3% to 5% in order to improve the strength of the humidity control building material. If it is less than 3%, the effect of improving the strength cannot be exhibited, and if it exceeds 5%, the properties of the humidity control building material as a non-combustible material are impaired. In this embodiment, organic reinforcing fiber: 3% to 5% and inorganic fiber: 4
% To 8%, or both.

[0038]

[Embodiment 4] This embodiment is a humidity control building material having the component system according to claim 5. In this embodiment,
In addition to the essential components, asbestos as an inorganic fiber material: 10% to 30%, and cement: 30% to 70% by weight. Asbestos improves the strength of the humidity control building material and improves the papermaking property in the manufacturing process. That is, in addition to having excellent properties as a reinforcing fiber of an inorganic matrix, in papermaking molding, it exerts a large hardening to capture solid components in a raw material slurry. From this viewpoint, at least 10% is added. However, if it exceeds 30%, on the contrary, the papermaking operation becomes difficult.

Cement is used as a hydraulic substance in an amount of 30% to
70% is blended. The cement has at least 30% as a matrix-forming component. But 70%
If the amount exceeds the above range, the weight of the humidity control building material may increase, and cracking due to drying and shrinkage may occur.

The organic reinforcing fiber is added in an amount of 3% to 5% to improve the strength of the humidity control building material. If it is less than 3%, the effect of improving the strength cannot be exhibited, and if it exceeds 5%, the properties of the humidity control building material as a non-combustible material are impaired.

In this embodiment, an inorganic admixture such as silica or calcium carbonate is added in an amount of 8% to 12% as an additive for improving drainage in the papermaking process.
If the amount is less than 8%, the effect of improving the papermaking moldability is not exhibited. However, if it is added in excess of 12%, the moisture-absorbing building material will have an excessively high water absorption, leading to a reduction in product performance.

[0042]

[Embodiment 5] This embodiment is a humidity control building material having the component system according to claim 6. In this embodiment,
In addition to the essential ingredients, asbestos: 2-6%, slag: 2
0% to 40%, gypsum: 20% to 60%. If the addition amount of the slag as a hydraulic substance is less than 20%, the strength-imparting ability is insufficient, and it is difficult to exhibit waterproofness, curing properties, and molding properties. On the other hand, if it exceeds 40%, cracking due to drying and shrinkage is caused.

Gypsum is blended with slag for the purpose of imparting fire resistance and fire resistance to a humidity control building material. In this embodiment, at least 20% is blended in order to effectively exhibit fire resistance and fire resistance. However, if it is added in excess of 60%, the bending strength is remarkably reduced even if the primary physical properties are divided, and the screw nail holding force is also reduced.

Asbestos is added together with inorganic fibers such as glass fiber and rock wool as an inorganic fiber material to make the flexural strength of a humidity control building material, and added at least 2% as an inorganic material capturing element such as gypsum and cement in a papermaking process. However, in this embodiment, the effect saturates at 6%.

Inorganic fibers other than asbestos, such as glass fibers and rock wool, are added together with asbestos in the range of 1% to 3% in order to improve the bending strength of the humidity control building material. If the addition amount is less than 1%, the addition effect cannot be exhibited and 3%
If the amount exceeds the addition amount, the kneading operation of the raw material and the water is hindered due to the addition amount of the asbestos, and further, fiber aggregates called lumps are mixed to impair the uniformity of the material of the humidity control building material.

The organic reinforcing fiber is added in an amount of 3% to 5% to improve the strength of the humidity control building material. If it is less than 3%, the effect of improving the strength cannot be exhibited, and if it exceeds 5%, the properties of the humidity control building material as a non-combustible material are impaired. In this embodiment, organic reinforcing fibers: 3% to 5% and inorganic fibers: 1
% To 3% or both are added.

[0047]

[Embodiment 6] This embodiment is a humidity control building material having the component system according to claim 7. In this embodiment,
In addition to the essential components, lime: 15% to 50%, silica: 1
One or both of 5% to 50%, organic reinforcing fiber: 3% to 5%, and inorganic fiber: 1% to 3% are added.

Lime functions as a CaO component, and diatomite and diatomaceous earth function as a SiO ₂ component. From the viewpoint of forming a gelled composition, a silicate excess or CaO / SiO _{2 in} which CaO / SiO ₂ is less than 0.2 is obtained. In order to prevent a lime excess state in which SiO ₂ exceeds 3.0,
Lime: 15% to 50%, silica stone: 15% to 50%, diatomaceous earth: 5% to 30%.

Next, a method for producing the humidity control building material of the present invention will be described. In the present invention, a humidity-controllable building material is manufactured by a papermaking method using a round-mesh papermaking machine. FIG. 1 shows a round-mesh paper machine known per se.

As shown in FIG. 1, the round mesh type paper making machine 1 includes a making roll 11, a bottom roll 12, a first tension roll 13, a worm roll 14, and a swing roll 1.
5, stretch roll 16, second tension roll 1
7, the first wire cylinder 18, the second wire cylinder 1
9, the third wire cylinder 20, the return roll 21, the first felt roll 22, the second felt roll 23, the third
An endless felt belt 27 is wound around a felt roll 24, a fourth felt roll 25, and a guide roll 26 so as to be able to run.

A suction box 28 is arranged near the guide roll 26 and functions to suck the raw material laminate on the endless felt belt 27.

The lower portions of the first to third wire cylinders 18 to 20 are disposed in the first to third bats 29 to 31, respectively. A plurality of agitators 32 are provided in each of the first bat 29 to the third bat 31.

The endless felt belt 27 is in contact with upper portions of the first to third wire cylinders 18 to 20, and is sandwiched between the first to third coach rolls 33 to 35, respectively. In addition, on the upper surface of the endless felt belt 27 above the first bat 29 to the third bat 31,
Suction box 36 to third suction box 38
Are arranged. These suction boxes 36, 3
7 and 38, the raw material mixture adhered to the first to third wire cylinders 18 to 20 is used for the endless felt belt 2.
7, so that the raw material mixture is always sucked so as to be easily adsorbed and transferred.

In the round netting machine 1, the raw material mixture is
The raw material mixture (slurry) is supplied to the first vat 29 to the third vat 31 so as to always have a constant height, and the lower part of each of the first to third wire cylinders 18 to 20 is provided.
Soak in In this state, run the endless felt belt 27,
Perform papermaking.

As the endless felt belt 27 comes into contact with the first wire cylinder 18, the second wire cylinder 19, and the third wire cylinder 20 in order, the raw material mixture is laminated. In this embodiment, the papermaking speed: 20 m /
Min-60m / min, pressure of making roll: 1kgf /
It is performed under the condition of cm ^{2 to 5} kgf / cm ² .

The raw material mixture laminated on the endless felt belt 27 includes a making roll 11 and a bottom roll 12.
And is discharged in a plate shape from the space between them and conveyed by a conveyor (not shown).

After the paper conveyed by the conveyor is kept at room temperature for 6 hours to 10 hours, it is steam-cured by a steam curing device in a temperature range of 60 ° C. to 80 ° C. for 12 hours to 24 hours. Next, it is left at room temperature for 100 hours and is provided for natural curing. Then, in the dryer, 140
Drying is performed for 5 minutes to 15 minutes in a temperature range of from 200C to 200C. After drying, it is cut to the specified size, thickness: 4
It is a moisture-controllable building material (board) of mm to 20 mm.

[0058]

EXAMPLES Example 1 By weight, gypsum dihydrate: 18%, blast furnace slag: 40%, cement: 5%, diatomaceous earth: 20% (particle size: 30 μm), pulp: 5%, rock wool: 3%, perlite (Lightweight aggregate): To a raw material mixture having a composition of 12%, water of 75% of the raw material mixture was added and kneaded, and the obtained slurry was formed using the above-mentioned round mesh type paper making machine at a paper making speed of 40 m. Per minute, pressure of a making roll: 4 kgf / cm ² , and then the temperature is increased stepwise to around 70 ° C.
It was steam cured for 8 hours. Thereafter, natural curing was performed for 100 hours. Then, in a dryer, 180 ° C sw10
After drying for 5 minutes, cut and perform thickness: 6m
m, a width: 910 mm, and a length: 1820 mm were obtained.

Table 1 shows the primary physical properties of this product humidity-control building material (board).

[Table 1] As is clear from Table 1, the humidity control building material according to the present invention is:
Compared with those of commercial products (gypsum-slag-cement-based humidity control building material), it has bending strength and the like which are not inferior.

Next, a humidity control building material (board) according to the present invention.
Is shown in Table 2.

[Table 2] 25 ° C x 65% RH, 168 hrs → 50% R
H, 112hrs → 25 ° C × 90% RH, 24hrs⇔
25 ° C. × 50% RH, 24 hrs, 4 cycles As is clear from Table 2, the moisture control building material of the present invention has a moisture absorption and desorption amount five times that of a gypsum board and twice that of a cedar lumber product, and is excellent in moisture absorption and desorption characteristics.

Table 3 shows the dimensional change in moisture absorption of the moisture-controllable building material (board) according to the present invention.

[Table 3] As is evident from Table 3, the dimensional stability of the moisture-controllable building material (board) of the present invention with respect to moisture absorption and the like is partially the same as that of commercial products A.
Although it is inferior to (gypsum-slag-cement-based humidity control building material), it has dimensional stability comparable to slag gypsum board and some commercial products B (gypsum-slag-cement-based humidity control material). are doing.

Next, Table 4 shows the wood screw holding power of the humidity control building material (board) of the present invention.

[Table 4] As is clear from Table 4, although the wood screw holding power of the humidity-controlling building material (board) of the present invention is inferior to that of the slag gypsum board, it can be applied to the gypsum board and the commercial product A (gypsum-slag-cement-based humidity-controlling building material). Has excellent wood screw holding force characteristics.

Example 2 By weight, cement: 40%, rock wool: 6%, perlite: 12%, fly ash (inorganic mixed material):
18%, diatomaceous earth having a particle size of 30 μm: 20%, pulp: 4
% Of the raw material composition, and kneaded by adding 75% of the water to the raw material, and the resulting slurry is paper-formed at a paper-forming speed of 40 m / min using a round mesh paper-making machine, and then to around 70 ° C. The temperature was increased stepwise, and steam (90% R
H) Cured. Thereafter, natural curing was performed for 100 hours. Thereafter, in a dryer, drying was performed at 180 ° C. for 10 minutes, and then cutting was performed to obtain a thickness: 6 mm and a width: 9
10mm, length: 1820mm humidity control building material (board)
I got It was a moisture-controllable building material having a bending strength in the length direction of 8 N / mm ² and having a moisture absorption / release capacity nearly twice that of a cedar lumber product.

Example 3 Gypsum: 30%, slag: 30%, silica (inorganic admixture): 8%, glass fiber: 6%, particle size: 2
To a raw material composition consisting of 0 μm diatomaceous earth: 22% and pulp: 4%, water of 75% of the raw material is added and kneaded, and the resulting slurry is formed using a round mesh type paper making machine at a paper making speed of 40 m / min. , And then the temperature is increased stepwise to around 70 ° C.
Steam curing (90% RH) at a temperature of 0 ° C. for 20 hours. Thereafter, natural curing was performed for 100 hours. Then, after drying in a dryer at 180 ° C. for 10 minutes, cutting is performed to obtain a thickness: 6 mm, a width: 910 mm, and a length: 1
An 820 mm humidity control building material (board) was obtained. ² of cedar lumber products with a bending strength in the length direction of 8 N / mm ² level
It was a moisture-regulating building material with nearly twice the capacity to absorb and release moisture.

Example 4 By weight, a raw material composition consisting of 15% asbestos, 51% cement, 10% calcium carbonate, 20% diatomaceous earth with a particle size of 27 μm, and 4% pulp was mixed with 75% of the raw material. Water was added and kneaded, and the resulting slurry was paper-milled at a paper-milling speed of 40 m / min using a round-mesh paper mill, and then the temperature was increased stepwise to around 70 ° C. Time steam (90% RH) curing. Thereafter, natural curing was performed for 100 hours. After that, in a dryer at 180 ° C. for 1 hour.
After performing drying for 0 minutes, cutting is performed, and the thickness is 6 m.
m, a width: 910 mm, and a length: 1820 mm were obtained. Flexural strength in the length direction is 8N /
of mm ² level, it was with humidity conditioning building materials nearly twice absorbing and retaining ability of cedar lumber.

Example 5 Asbestos: 4%, rock wool: 2%, slag: 3 by weight
0%, diatomaceous earth having a particle size of 18 μm: 28%, gypsum: 32
%, Pulp: 75% of raw material in raw material composition consisting of 4%
Of water and kneaded, and the resulting slurry is subjected to papermaking at a papermaking speed of 40 m / min using a round mesh papermaking machine.
The temperature was raised stepwise to around 0 ° C., and steam (90% RH) curing was performed at a temperature of 70 ° C. for 20 hours. Thereafter, natural curing was performed for 100 hours. Then, in the dryer, 180
After drying at 10 ° C for 10 minutes, cutting is performed to obtain a thickness:
A humidity control building material (board) having a size of 6 mm, a width of 910 mm, and a length of 1820 mm was obtained. Flexural strength in the length direction of 8
Of N / mm ² level, it was having Humidity building material nearly twice absorbing retaining ability cedar lumber.

Example 6 Lime: 40% by weight, silica: 30% by weight, particle size 35 μm
Diatomaceous earth: 20%, pulp: 4%, rock wool: 6%
75% of the raw material water is added to the raw material composition, and the resulting slurry is kneaded, and the obtained slurry is paper-formed at a paper-forming speed of 40 m / min using a round-mesh paper-making machine, and then the temperature is reduced to around 70 ° C. The temperature was raised to 70 ° C for 20 hours with steam (90% R
H) Cured. Thereafter, natural curing was performed for 100 hours. Thereafter, in a dryer, drying was performed at 180 ° C. for 10 minutes, followed by cutting to obtain a thickness: 6 mm and a width:
A humidity-controlling building material (board) having a length of 910 mm and a length of 1820 mm was obtained. Flexural strength in the length direction of 8 N / mm ²
It was a moisture-regulating building material with a moisture absorption and desorption capacity almost twice that of cedar lumber products.

[0068]

According to the present invention, moisture absorption / desorption characteristics, nonflammability,
It is possible to provide a lightweight, moisture-controllable building material that is excellent in machinability, dimensional stability, and nail / wood screw holding power at low cost.

According to the second aspect of the present invention, it is possible to provide a light-weight humidity-controllable building material having excellent moisture absorption / release properties and also excellent fire resistance, fire resistance and nailing properties.
Further, since the humidity control building material of the present invention is manufactured by a papermaking method, it is possible to provide a building material (board) having a uniform material without unevenness in specific gravity.

According to the third aspect of the present invention, it is possible to provide a pulp cement board-based building material excellent in humidity control.

According to the fourth aspect of the present invention, it is possible to provide a slag gypsum board-based building material excellent in humidity control.

According to the fifth aspect of the present invention, it is possible to provide a slate plate-based building material excellent in humidity control.

According to the invention of claim 6, a fiber gypsum board-based building material excellent in humidity control can be provided.

According to the seventh aspect of the present invention, there can be provided a calcium silicate plate-based building material excellent in humidity control.

According to the eighth aspect of the present invention, since it is manufactured by a papermaking method, it is possible to provide a building material (board) having a uniform material without unevenness in specific gravity.

[Brief description of the drawings]

FIG. 1 is a front view showing an outline of a round-mesh papermaking machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Round-mesh machine 11 Making roll 12 Bottom roll 13 First tension roll 14 Warm roll 15 Swing roll 16 Stretch roll 17 Second tension roll 18 First wire cylinder 19 Second wire cylinder 20 Third wire cylinder 21 Return roll 22 First felt roll 23 Second felt roll 24 Third felt roll 25 Fourth felt roll 26 Guide roll 27 Endless felt roll 28 Suction box 29 First butt 30 Second butt 31 Third butt 32 Agitator 33 First coach roll 34 First 2 coach roll 35 3rd coach roll 36 1st suction box 37 2nd suction box 38 3rd suction box

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) C04B 16:06 C04B 16:06 Z 22:14 22:14 B 14:18 14:18 14:40 14: 40 14:06) 14:06) Z 111: 28 111: 28 111: 30 111: 30 111: 40 111: 40 F term (reference) 2E001 DB02 DB03 DB04 DB05 DE01 DH12 DH13 DH25 DH39 FA09 FA10 FA11 FA14 GA12 JA01 JA02 JA06 JA12 JA21 JA24 JC08 4G012 MB23 PA04 PA05 PA07 PA15 PA16 PA17 PA18 PA24 PA29 PC11 PE04 4G052 EA02 EA03 EA07 EA09 EB02

Claims (8)

[Claims] 1. A papermaking method comprising: diatomaceous earth having a particle size in a range of 2 μm to 100 μm: 5% to 30% by weight, the balance being made of an inorganic material and / or one of an organic reinforcing fiber and an inorganic fiber. Building materials obtained by 2. By weight, gypsum dihydrate: 2% to 30%, hydraulic substance: 15% to 60%, diatomaceous earth having a particle size in the range of 2 μm to 100 μm: 5% to 30% by weight, perlite: 5% to 15%, organic reinforcing fiber: 3% to 5%, and inorganic fiber: 1% to 8%, or both, and a humidity control building material obtained by a papermaking method. 3. By weight, cement: 30% to 50%, pearlite: 5% to 20%, inorganic mixed material: 10% to 3%
0%, diatomaceous earth having a particle size in the range of 2 μm to 100 μm: 5% to 30% by weight, organic reinforcing fiber: 3% to 1%
3% and inorganic fiber: 4% to 8%, or both, and a humidity control building material obtained by a papermaking method. 4. By weight, gypsum dihydrate: 20% to 50%, slag: 20% to 50%, mineral admixture: 5% to 15%,
A moisture-controllable building material obtained by a papermaking method, comprising diatomaceous earth having a particle size in a range of 2 μm to 100 μm: 5% to 30% by weight, organic reinforcing fiber: 3% to 5%, and inorganic fiber: 4% to 8%. 5. As weight, asbestos: 10% to 30%, cement: 30% to 70%, mineral admixture: 8% to 12%, diatomaceous earth having a particle size in the range of 2 μm to 100 μm: 5% by weight or more. 30% by weight, organic reinforcing fiber: 3% to 5%, a humidity control building material obtained by a papermaking method. 6. Asbestos: 2% to 6% by weight, slag: 2 by weight
0% to 40%, gypsum: 20% to 60%, particle size 2 μm
Diatomaceous earth in the range of 100 μm: 5% to 30%, organic reinforcing fiber: 3% to 5%, and inorganic fiber: 1% to 3%
And a moisture-controllable building material obtained by a papermaking method. 7. Lime: 15% to 50% by weight, silica:
Diatomaceous earth having a particle size in the range of 15% to 50% and a particle size of 2 μm to 100 μm: 5% to 30% by weight, organic reinforcing fiber:
A moisture-controllable building material comprising one or both of 3% to 5% and inorganic fiber: 1% to 8% and obtained by a papermaking method. 8. A raw material comprising diatomaceous earth having a particle size in a range of 2 μm to 100 μm: 5% to 30% by weight, and the balance comprising an inorganic material and one or both of an organic reinforcing fiber and an inorganic fiber; A method for producing a moisture-controllable building material, which comprises forming a mixed slurry of water to a predetermined thickness, curing, and drying.