JP2002114563A - Method for manufacturing moisture conditioned tile and moisture conditioned tile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a moisture conditioned tile having excellent quality performance with good productivity by making an extrusion molding method applicable. SOLUTION: This method for manufacturing the moisture conditioned tile 10 by firing molded goods of a molding material containing an inorganic moisture conditioning material includes a process step (a) of obtaining extrusion molded goods by extrusion molding the molding material which consists essentially of the inorganic moisture conditioning material, contains 5 to 50 wt.% clay component and has a moisture content of 25 to 40% and a process step (b) of firing the extrusion molded goods at <=1,000 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method of manufacturing a humidity control tile capable of exerting a humidity control function in a construction environment such as a house, and a humidity control tile obtained by such a manufacturing method. It is targeted.

[0002]

2. Description of the Related Art Humidity-controlling tiles are made by mixing a material having excellent moisture-absorbing and desorbing properties, such as diatomaceous earth, that is, a humidity-controlling material, into the raw material to absorb moisture from the surface or to absorb the absorbed moisture in the construction state. It can exhibit a so-called humidity control function of keeping it inside or releasing absorbed moisture to the outside as needed. A conventional general method of manufacturing a humidity control tile is to mold a molding material obtained by mixing a binder material such as clay with a humidity control material into a predetermined shape using a molding die, and then obtain the obtained molded product. Has been fired.

[0003]

However, the above-mentioned manufacturing method has a problem that the molding step requires a great deal of labor and time, and the manufacturing cost of the humidity control tile is high. In order to improve the efficiency of the molding process, it has been considered to apply an extrusion molding method known in the production of synthetic resin products and the like. If the extrusion molding method is adopted, there is a possibility that productivity can be remarkably improved as compared with the molding method. However, if a molding material used in a molding method using a conventional molding die is directly used for extrusion molding, there is a problem that stable molding cannot be performed.

[0004] In the extrusion molding, conventional molding materials can be smoothly extruded from a molding die in a fluidized state, and the extruded molded product has sufficient shape maintaining properties. Properties and properties different from the molding material used in the molding method are required. An object of the present invention is to solve the problems of the conventional method for producing a humidity-conditioning tile by a molding method, and to provide a method capable of producing a humidity-conditioning tile having excellent productivity and excellent quality performance. is there.

[0005]

SUMMARY OF THE INVENTION A method of manufacturing a humidity-control tile according to the present invention is a method of manufacturing a humidity-control tile by firing a molded article of a molding material containing an inorganic humidity control material. (A) extruding a molding material containing a wet component as a main component, containing 5 to 50% by weight of a clay component, and having a water content of 25 to 40% to obtain an extruded product;
B. [Inorganic humidity control material] As the inorganic humidity control material, various types of inorganic humidity control materials used in the production of ordinary building materials can be used.

Specifically, porous minerals such as zeolite and sepiolite, clay minerals such as atavulgite, montmorillonite, zonotolite, and activated clay, diatomaceous earth,
Silica gel, allophane, imogolite, charcoal and the like can be used. The performance of the porous material, such as humidity control, is enhanced by its physical structure. As a porous material, the average pore radius is 20 to 100 ° and the specific surface area is 20 to ²⁰⁰ m ² / g.
, Preferably 20 to 60 ° and a specific surface area of 20 to 2
Those having a size of 00 m ² / g are preferred. Siliceous shale, which is a kind of diatomaceous earth, is excellent in heat resistance, humidity control function and the like. As the inorganic humidity conditioner, only one type may be used alone, or a plurality of types may be used in combination.

A material containing a clay component can be used as the inorganic humidity conditioner. Some inorganic humidity control materials obtained from natural minerals and the like originally contain a clay component.
An example is clayey siliceous shale. As the shape of the inorganic humidity control material, if it can be extruded by being blended with a molding material, a powder or agglomerate having a spherical shape, a rod shape, an irregular shape or the like is used. The inorganic humidity conditioner can be pulverized or granulated and added to the molding material. As the particle size of the inorganic humidity control material, one having an outer diameter in the range of 5 to 75 μm can be used at the stage of being mixed with the molding material. By supporting titanium oxide on the inorganic humidity conditioner,
The manufactured humidity-controlling tile can have a photocatalytic function of titanium oxide. The photocatalytic function of titanium oxide decomposes organic matter of dirt adhering to the surface of the humidity control tile and can prevent the growth of mold and various bacteria on the surface.
In addition, it also has a function of decomposing a gas or the like adsorbed by the inorganic humidity control material. If titanium oxide is present in the fine voids that have the function of adsorbing the inorganic humidity control material, the adsorbed gas and titanium oxide can be in sufficient contact, and the decomposition effect of titanium oxide can be efficiently exhibited. Is done. As a result, the surface of the humidity control tile can be kept clean for a long period of time, and the function of the inorganic humidity control material can be maintained.

[Clay component] It becomes a binder component of a molding material. Various clay materials used in the manufacture of ordinary humidity control tiles can be used. Clay from sedimentary rocks can be used. The clay component can be used in the form of a powder or granule, a slurry, or a dry mass. As the clay component, a material prepared separately from the inorganic humidity conditioner can be mixed into the molding material, or the clay component originally contained in the inorganic humidity conditioner can be used.

[Molding material] Basically, it is formed by combining materials similar to those of a normal humidity control tile. Inorganic humidity conditioners and clay components are essential materials. Specifically, a clay component serving as a binder component, a binder component other than the clay component, a coloring material, and other additional materials are blended with an inorganic humidity control material that gives a humidity control function to the humidity control tile as a main component. When 0 to 15% by weight of glass powder is added to the molding material, the surface hardness of the humidity control tile is improved and the surface is hardly damaged.
If the amount of the glass powder is appropriate, the humidity control function is hardly adversely affected. If a coloring material such as a pigment is blended, a colored humidity control tile can be obtained.

As a molding material, a material containing an inorganic humidity control material as a main component and a clay component of 5 to 50% by weight is used. It preferably contains 10 to 25% by weight of a clay component. If the amount of the clay component is too small, stable extrusion cannot be performed. If the clay component is too large, the humidity control performance will be poor. As a molding material, the main component is an inorganic humidifier made of siliceous shale containing 5 to 20% by weight of a clay component, and a clay component of 0 to 35% by weight is added separately from the clay component contained in the inorganic humidifier. Can be used. Clay siliceous shale containing a relatively large amount of a clay component can be extruded even if the amount of the clay component added to the molding material is reduced, and the quality of the molded product is good. In particular, even if the total amount of the clay component in the molding material is the same, the more the clay component contained in the inorganic moisture conditioner, the better the moldability of the extrusion molding. Also as a humidity control tile, the amount of the inorganic humidity control material exhibiting the humidity control function is increased, so that the humidity control performance is also excellent.

In the case of using an inorganic humidity control material containing little or no clay component, it is preferable to add a sufficient amount of the clay component to the molding material. By adding the clay component, it becomes possible to favorably use even an inorganic humidity conditioner having a small content of the clay component. [Manufacture of molding material] Molding material, if the raw material containing the inorganic moisture conditioner and clay component can be extruded,
Basically, it can be manufactured through the same manufacturing process as a molding material in a conventional molding method.

Normally, all the materials constituting the molding material may be pulverized, mixed or dissolved to obtain a molding material having a fluidity capable of being extruded. The water content of the molding material used for extrusion molding is adjusted to 25 to 40% by weight. Preferably, moisture 3
Adjust to 0-38% by weight. If the water content is too low, extrusion molding is difficult, and the mechanical strength of the molded product is reduced, or insufficient strength is obtained after firing. If the water content is too high, extrusion molding becomes difficult, drying distortion occurs, and the yield of molded products deteriorates.

[Wet milling / spray granulation] A raw material containing an inorganic humectant and a clay component is wet-milled and then spray-granulated to obtain a molding material. Usable granulation techniques can be applied to wet granulation and spray granulation using equipment and processing conditions. Specifically, the raw material in a slurry state is wet-pulverized, and then heated and dried by a burner while spraying the slurry to obtain a granular granule of about 0.5 mm or less. By appropriately setting the drying conditions for the spray granulation, the water content of the granulated raw material can be adjusted to a desired range. After the spray granulation, a drying step or a moisture adjusting step may be separately performed.

[Extrusion molding] Basically, an ordinary extrusion molding technique using a synthetic resin or an inorganic material is applied. Conventionally,
Extrusion molding apparatuses and extrusion molding methods used in the production of various building materials can be employed. In the extrusion molding, a molding material is extruded in a cross-sectional shape corresponding to a cross-sectional shape of a die, and the extruded molding material is cut into predetermined dimensions to obtain individual extruded products. The extruded molded product can be subjected to a baking process immediately, before the baking process, a drying process and a curing process for adjusting the moisture content of the extruded product, and cutting and drilling of the extruded product. And the like, or a step of combining and extruding another member with the extruded product to integrate them.

For example, after drying an extruded product, if a glaze layer having moisture permeability is applied to the surface, a surface layer made of glaze excellent in aesthetic appearance can be formed on the surface of the fired moisture-control tile. Can be. If a material capable of forming a moisture-permeable surface layer is used as the material of the glaze layer, the humidity control property of the humidity control tile is not impaired. If the glaze layer material is mixed with an inorganic humidity control material, the surface layer of the humidity control tile can also have a humidity control function. Furthermore, the above-mentioned titanium oxide or the like having photocatalytic properties can be supported on the material of the glaze layer together with the inorganic humidity conditioner. If inorganic glaze and titanium oxide are present in the glaze layer present on the surface layer of the humidity control tile, the inorganic moisturizer absorbs moisture and simultaneously forms hydrophilic groups such as ammonia and formalin. The adsorbed gas is efficiently adsorbed, and the adsorbed gas can be efficiently decomposed by the photocatalytic action of titanium oxide. Compared with the case where titanium oxide is applied to the surface of the fired humidity control tile and dried or baked, the number of steps is reduced, and the synergistic action with the inorganic humidity control material can be exhibited effectively.

[Sintering] Basically, the same sintering technique as that used in ordinary production of a humidity-controlled tile is applied. Preferable conditions may be set in a general firing apparatus and firing method. The firing temperature is set at 1000 ° C. or lower. Preferably 80
Set to 0-950 ° C. If the firing temperature is too high, the humidity control function inherent to the inorganic humidity control material cannot be sufficiently exhibited. If the firing temperature is too low, the mechanical properties and the like of the humidity control tile deteriorate. When a material having relatively low heat resistance such as allophane is used as the inorganic humidity conditioner, the firing temperature is set to 800 to 87.
It is preferable to set the temperature to 0 ° C.

The firing time can be set in the range of 1 to 5 hours. [Humidity control tile] The humidity control tile obtained by firing can be used as it is as a building material. The fired humidity control tile may be used after further machining, coating the surface, or bonding another member to the humidity control tile. For example, if the surface of the humidity control tile is coated with an amine-based formalin catcher agent, formalin adsorption can be improved.

The surface of the humidity control tile may be coated with titanium oxide. A glaze layer may be applied to the surface and then fired again to obtain a humidity control tile having a glaze surface layer.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 shows a schematic structure of a humidity control tile. The humidity control tile 10 includes a main body 12 having a substantially rectangular plate shape, and a surface layer 14 covering the upper surface and side surfaces of the main body 12. The main body 12 contains an inorganic humidity control material and a clay component, is fired after extrusion molding, and has a humidity control function of the inorganic humidity control material. The surface layer 14 is formed by forming a glaze layer containing an inorganic humidity control material and titanium oxide on the surface of the extruded product of the main body 12,
It is integrated with the main body 12 by firing, and in addition to the beautiful surface texture by the glaze, the function of humidity control or gas adsorption by inorganic humidity control material and the function of decomposition of dirt and gas by titanium oxide. Have.

The humidity control tile 10 having such a structure can be used for interior finishing of a building. In the space where the humidity control tile 10 is constructed, the humidity environment can be favorably adjusted and maintained within a certain range suitable for living. In a place such as a bathroom where a high humidity environment is likely to occur, the humidity can be adjusted favorably. Titanium oxide contained in the surface layer 12 quickly decomposes dirt attached to the surface of the construction surface, and prevents the generation and propagation of mold and various bacteria on the surface.

[0021]

According to the method for producing a moisture-conditioned tile according to the present invention, an extruded product having good quality performance can be obtained by extruding from a molding material in which the amount of clay component and moisture are specified. Is obtained. By baking such an extruded product to produce a humidity control tile, a humidity control tile excellent in quality performance can be obtained. As a result, it is possible to employ extrusion molding with excellent productivity in the production of humidity control tiles, and it is possible to efficiently manufacture humidity control tiles suitable for interior finishing of various buildings, etc. It can contribute to the expansion of demand and applications of wet tiles.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a humidity control tile representing an embodiment of the present invention.

[Explanation of symbols]

 10 Humidity control tile 12 Body layer 14 Surface layer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kimiaki Saita 2231-2, Dachi-cho, Toki-shi, Gifu Prefecture Inside (72) Inventor Taiji Yamauchi 2231-2, 2-21, Dachi-cho, Toki-shi, Gifu Prefecture Takasago Industry F term (reference) 4G054 AA06 AC11 DA01

Claims (7)

[Claims] 1. A method for producing a humidity control tile by firing a molded article of a molding material containing an inorganic humidity control material, comprising a clay component containing 5 to 50% by weight of an inorganic humidity control material as a main component. A process for extruding a molding material having a water content of 25 to 40% to obtain an extruded product; and a step (b) of firing the extruded product at 1000 ° C. or lower (b). Method. 2. The method according to claim 1, wherein said step (a) uses siliceous shale as an inorganic humidity control material. 3. The method according to claim 1, wherein said step (a) comprises, as a main component, an inorganic moisture conditioning material comprising siliceous shale containing 5 to 20% by weight of a clay component;
0 to 35% by weight separately from the clay component contained in the inorganic moisture conditioner
The method for producing a humidity-conditioning tile according to claim 1 or 2, wherein the molding material containing the clay component is extruded. 4. In the step (a), a tile raw material containing an inorganic humidity conditioner and a clay component is wet-pulverized, then spray-granulated, and the obtained molding material is adjusted to a water content of 25 to 40% and extruded. The method for producing a humidity control tile according to claim 1, wherein the tile is formed. 5. The method according to claim 1, further comprising a step (-b) of forming a moisture-permeable glaze layer on the surface of the extruded product before the step (b). Manufacturing method of wet tile. 6. The humidity control tile according to claim 1, further comprising a step (c) of coating the surface of the humidity control tile with an amine-based formalin catcher agent after the step (b). Production method. 7. A humidity control tile obtained by the method according to claim 1.