JP2005180176A - Ceiling panel and ceiling structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling panel which is light and has high strength with excellent moisture absorbing and releasing characteristics so as to obtain a sufficient humidity conditioning performance only through a ceiling area of a room, as well as a ceiling structure and a ceiling using it. <P>SOLUTION: The ceiling panel is composed of an inorganic cured body, and its interior side in the room is composed of the inorganic cured body (preferably containing a porous material in which the inorganic material composed of wallastonite is cured by carbonizing and which has 50 to 180 m<SP>2</SP>/g of BET specified surface area and 0.1 to 100nm of mean cell diameter while preferably the porous material is an attapulgite) having the absolute value 250 to 1000g/m<SP>2</SP>in a difference under the condition at 25°C between the moisture-absorbing quantity when absorbing moisture for 24 hours at 50 % of relative humidity and the moisture absorbing quantity when absorbing humidity for 24 hours as 90 % of relative humidity. In the ceiling structure, the ceiling panel is attached to a surface of a ceiling base material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a ceiling panel, a ceiling structure, and a ceiling using the ceiling panel, and more particularly to a ceiling panel and a ceiling structure that are suitably used for buildings and structures.

  In recent years, in order to adjust indoor humidity and prevent high humidity in summer and overdrying in winter, for example, Patent Document 1 uses allophane or imogolite which is a porous material such as volcanic pumice, Humidity control building materials made by mixing, molding, and condensing with setting curing agents have been proposed.

  In general, some humidity conditioning materials include gypsum board containing diatomaceous earth, but the moisture absorption / release performance is not always sufficient. It was necessary to increase the plate pressure or to contain a large amount of diatomaceous earth.

  Further, when the gypsum board is used in place of the ceiling base material, it is necessary to affix a cloth material on the surface thereof, which causes a problem that the moisture absorption / release performance is extremely lowered.

  If the plate pressure is increased in order to compensate for the above-described deterioration in performance, not only does the weight increase and a heavy burden is imposed on the ceiling frame, but there is also a problem that the number of installation steps increases due to an increase in the number of attachment members.

  Further, if the content of porous material such as diatomaceous earth is increased too much, there are problems such as a decrease in strength and a dimensional change due to water absorption.

  In recent years, ceramic tiles containing porous materials other than diatomaceous earth have been marketed, but considering the viewpoint of reducing dew condensation in the room, the humidity control effect is not always sufficient. There were problems in terms of construction costs because installation was required on many aspects of the construction.

  Usually, the main use of humidity control building materials is to replace gypsum board on the inner wall of the room or to apply it on the surface of gypsum board. If it can be exhibited, it is suitable not only because the construction is simple, but also because there is no need to limit the sticking surface by furniture unique to the wall surface and the burden of furniture movement during construction.

Therefore, when trying to install a humidity control building material of ceramic tile on the ceiling, the material is very hard, so nails, screws, drilling tapping screws, staples etc. that are usually used for ceiling material installation cannot be used, and the base material or tile This is a method of applying a large amount of adhesive to the back surface of the substrate and then sticking it to the surface of the base material. However, high adhesive strength is required for sticking to the ceiling, so the adhesive is not only expensive, but also requires a temporary presser until the adhesive hardens, as ceiling work such as jointing tiles and adjusting tension Was extremely difficult.
JP-A-8-144387

  An object of the present invention is to provide a ceiling panel and a ceiling structure having excellent moisture absorption and desorption properties that are lightweight and high-strength and have sufficient moisture conditioning performance only with the indoor ceiling area, in view of the problems of the conventional humidity conditioning building materials. It is to provide.

The ceiling panel according to claim 1 is a ceiling panel made of an inorganic hardened body, and its surface corresponding to the indoor side absorbs moisture for 24 hours at a relative humidity of 50% under a temperature condition of 25 ° C. It is characterized by comprising an inorganic cured body whose absolute value of the difference between the amount and the amount of moisture absorbed when absorbed for 24 hours at 90% relative humidity is 250 to 1000 g / m ² .

  The ceiling panel according to claim 2 is the ceiling panel according to claim 1, wherein the inorganic hardened body is hardened by carbonation.

  The ceiling panel according to claim 3 is the ceiling panel according to claim 1, wherein the inorganic hardened body is obtained by hardening an inorganic material made of wollastonite by carbonation.

  The ceiling panel according to claim 4 is the ceiling panel according to any one of claims 1 to 3, wherein the BET specific surface area of the inorganic cured body is 50 to 180 m 2 / g.

  The ceiling panel according to claim 5 is the ceiling panel according to any one of claims 1 to 4, wherein a porous material having an average pore diameter of 0.1 to 100 nm is included in the inorganic cured body. It is characterized by that.

  A ceiling panel according to claim 6 is the ceiling panel according to claim 5, wherein the porous material is attapulgite.

  A ceiling panel according to a seventh aspect is the ceiling panel according to any one of the first to sixth aspects, wherein at least one pair of parallel sides is an actual shape or an open shape.

  The ceiling structure according to claim 8 is a ceiling structure in which the ceiling panel according to any one of claims 1 to 7 is used, wherein the ceiling panel is attached to a surface of a ceiling base material. And

  The ceiling structure according to claim 9 is a ceiling structure in which the ceiling panel according to any one of claims 1 to 6 is used, and a plate-like body having an area larger than that of the ceiling panel is the ceiling panel. The ceiling panel composite board which sticks out and is shifted | deviated outside from at least 1 side among these 4 sides is attached so that the said ceiling panel may become a room interior side on the surface of a ceiling base material.

  The ceiling structure according to claim 10 is the ceiling structure according to claim 9, characterized in that at least one pair of parallel sides of the plate-like body has an abrupt shape.

  The ceiling structure according to claim 11 is a ceiling structure using a ceiling panel in which at least one pair of parallel sides has an open shape, and the plate-like body having an area larger than that of the ceiling panel is the ceiling structure. A ceiling panel composite board that protrudes outward from the convex side of the gap between the ceiling panels and sticks to the actual shape is mounted on the surface of the ceiling base material so that the ceiling panel is on the indoor side. It is characterized by being.

  A ceiling structure according to a twelfth aspect is the ceiling structure according to any one of the ninth to eleventh aspects, wherein a through-hole is provided in a projecting surface of the plate-like body from the ceiling panel, and is passed through the through-hole. The ceiling panel composite board is attached to the surface of the ceiling base material by a metal fitting so that the ceiling panel is on the indoor side.

  Hereinafter, the present invention will be described in detail.

The ceiling panel according to the present invention absorbed moisture at a relative humidity of 50% for 24 hours under a temperature condition of 25 ° C. on the surface corresponding to the indoor side, and at a relative humidity of 90% for 24 hours. The absolute value of the difference from the amount of moisture absorbed at the time is 250 to 1000 g / m ² .

  The test method for determining the difference in moisture absorption is, for example, as follows. That is, under the condition adjusted to 25 ° C., the other surface is masked so that only one surface corresponding to the indoor side of the ceiling panel test piece made of the inorganic cured body is exposed, and the constant condition of 25 ° C. The test piece was held for 24 hours in an atmosphere having a relative humidity of 50% and then held for 24 hours in an atmosphere having a relative humidity of 90%. The test piece was repeated every 24 hours for a total of 48 hours as one cycle. The absolute value of the difference between the weight of the test piece after being held for 24 hours in an atmosphere with a relative humidity of 50% and the weight of the test piece after being held for 24 hours in an atmosphere with a relative humidity of 90% ( In the case of repeating a plurality of cycles, the average value) is obtained, and the difference in moisture absorption per unit area with respect to the exposed surface area (hereinafter also referred to as “panel surface moisture absorption”) is obtained.

  If the panel surface moisture absorption amount is too small, the humidity control function may be insufficient. If the panel surface moisture absorption amount is too large, the inorganic cured body becomes so-called porous (porous) and it is difficult to obtain sufficient strength. There is.

  The inorganic cured body in the present invention is not particularly limited, such as its raw materials, other blended materials, and a molding method for shaping into a predetermined shape. For example, an inorganic material containing calcium silicate, gypsum, dihydrate gypsum, or the like is extruded. It can be obtained by shaping by curing or the like and curing.

  In the present invention, the method for obtaining the inorganic cured body having the panel surface moisture absorption amount is not particularly limited. For example, an inorganic material mainly composed of calcium silicate contains a porous material having fine pores, It can be obtained by curing.

  In the above, it is preferable that the inorganic cured body is cured by carbonation in terms of the balance between moisture absorption / release properties and strength.

  In the above, hardening by carbonation means that an inorganic material containing calcium silicate is mixed with water and brought into contact with carbon dioxide, and the inorganic material component such as calcium silicate is cured by reacting with carbon dioxide.

  Examples of the method of curing by carbonation (hereinafter also referred to as “carbonation treatment”) include a method of contacting carbon dioxide in a gas state or a supercritical state. In this case, an arbitrary concentration may be used as the carbon dioxide gas concentration, but treatment at a concentration close to 100% is preferable in terms of carbonation efficiency.

  Although it does not specifically limit as temperature of a carbonation process, From the viewpoint of reaction amount and industrial productivity, the range of room temperature-200 degreeC is preferable, and 40 degreeC-120 degreeC is more preferable. If the treatment temperature is too low, the amount of carbonation reaction will decrease and the strength of the cured product will tend to decrease.If the treatment temperature is too high, the carbonation reaction amount will increase, but the density of the cured product will increase. This tends to decrease and requires a large amount of energy, which is not preferable from the viewpoint of industrial productivity.

  Although it does not specifically limit as a pressure of carbonation treatment, From a viewpoint of reaction amount and industrial productivity, it is preferable to exist in the range of 0.2-20 MPa, More preferably, it is 0.5-1 MPa. That is, when it is lower than 0.2 MPa, the carbonation reaction amount tends to decrease and the strength tends to decrease, and when it is higher than 20 MPa, the carbonation reaction amount hardly changes and industrial energy is required because large energy is required. From the viewpoint of

  The carbonation time is not particularly limited, but is preferably within the range of 5 to 120 minutes from the viewpoint of the reaction amount and industrial productivity. That is, when it is shorter than 5 minutes, the carbonation reaction amount tends to decrease and the strength tends to decrease. When it is longer than 120 minutes, the carbonation reaction amount hardly changes, but it is not efficient from the viewpoint of productivity.

Examples of the calcium silicate include calcium silicate hydrates such as cement hydrate and tobermorite, and calcium silicate anhydrates such as cement and wollastonite. Especially, it is preferable to use a calcium silicate anhydrate from the point of strength development of a hardening body. When calcium silicate is brought into contact with carbon dioxide in the presence of water, calcium carbonate and amorphous silica are formed, and a cured body with excellent strength can be obtained, and calcium carbonate and amorphous silica are formed. Within the reaction condition range, the porosity can be maintained without reducing the pore structure during molding.

  If the calcium silicate is a cement that generates calcium hydroxide in association with a hydration reaction, the inorganic material is more preferable in that it easily causes a carbonation reaction. Examples of these cements include ordinary Portland cement, special Portland cement, alumina cement, or the like can be used.

  Moreover, if the said calcium silicate is a wollastonite, when hardening by carbonation, it is more preferable at the point which the chemical stability of reaction rate and hardened | cured material physical property improves.

The wollastonite is a silicate mineral consisting of calcium silicate represented by CaSi0 _3, it is naturally occurring as a white fibrous or lumps. In general, the fibrous shape is used as a reinforcing member for asbestos substitution.

  The wollastonite is preferably wollastonite that has been pulverized to increase the specific surface area, and the particle size is preferably 10 μm or less in terms of average particle size. When the average particle size is larger than 10 μm, the carbonation reaction may not easily proceed to the inside of the particles.

  The aspect ratio of the wollastonite is preferably 10 to 25, and more preferably 15 to 23.

  When the aspect ratio is less than 10, the wollastonite orientation is not efficiently performed in the shaping step before the carbonation treatment, and the densification of the shaped body is insufficient, and the reaction rate by the carbonation treatment tends to be slow. When the aspect ratio exceeds 25, the entanglement between wollastonite fibers is large, the bulk density tends to be high, and high-pressure and long-time press molding tends to be required for shaping.

  As a compounding ratio of the wollastonite in the inorganic material, for example, in the case of an inorganic material using gypsum and wollastonite, 20 to 230 parts by weight is preferable with respect to 100 parts by weight of gypsum, and more preferably 30 to 100 parts by weight. Parts by weight.

It is preferable that the BET specific surface area of the inorganic cured body in the present invention is 50 to 180 m ² / g in that the moisture absorption / release property is further improved. That is, in order to exhibit moisture absorption and desorption properties as a building material, there are very fine pores inside the material, and it is necessary for water vapor to enter the pores and be adsorbed and desorbed by capillary condensation. Since the specific surface area is large, the material has a large number of pores and has excellent moisture absorption / release performance.

  In order to provide such fine pores, it is preferable that a porous material having an average pore diameter of 0.1 to 100 nm is contained in the inorganic cured body.

  In the above, if the specific surface area is too small, the condensation adsorption of water vapor may be insufficient and the humidity adjustment effect may be insufficient, and if it is too large, desorption after adsorption of water vapor will be difficult and the humidity adjustment effect will be insufficient. It may be insufficient. The same tendency is shown also about the average pore diameter in the said porous material.

  The porous material is not particularly limited, and examples thereof include diatomaceous earth, zeolite, perlite, allophane, sepiolite, silica gel, attapulgite, and clay mineral. Among them, it is preferable that the porous material is attapulgite from the viewpoints of moisture absorption / release performance and moldability when combined with a carbonized tissue.

The attapulgite is a hydrous magnesium silicate mineral generally represented by the chemical formula of Si ₈ O ₂ OMg ₅ (OH) ₂ (OH ₂ ) ₄ .H ₂ O. The crystal structure of attapulgite is usually in the form of needles and fibers of about 1 μm and consists of fine pores.

  The presence of attapulgite in the inorganic cured body can be confirmed, for example, by X-ray diffraction measurement. When attapulgite is included in the cured body, it can be confirmed from the fact that diffraction peaks exist at 2θ = 8.4 to 8.6 and 19.8 to 19.95 ° in the measurement using copper as a tube. Further, in addition to the above, it can also be confirmed from the presence of a broad peak comprising a plurality of peaks in the vicinity of 27 to 28 °.

  In addition to the above-described inorganic cured body in the present invention, if necessary, for example, inorganic fillers such as cement, silica sand, coal ash, gypsum, natural fibers such as wood chips, pulp, vinylon, polyester, nylon, etc. The synthetic resin fiber may be included.

  The ceiling panel of the present invention has a moisture absorption amount when absorbed at a relative humidity of 50% for 24 hours under a temperature condition of 25 ° C. on a surface corresponding to the indoor side, and when absorbed at a relative humidity of 90% for 24 hours. Since the absolute value of the difference from the moisture absorption amount is in a specific range, it is possible to provide a ceiling panel having excellent moisture absorption / release properties that can provide sufficient humidity control performance only with the indoor ceiling area.

  If the inorganic cured body is cured by carbonation, a lightweight and high-strength inorganic cured body can be obtained, so that the weight can be reduced while having sufficient strength as a ceiling panel, and the above effect is more certain. It will be a thing.

  If the inorganic hardened body is an inorganic material made of wollastonite that has been hardened by carbonation, the reaction speed and chemical stability of the hardened body properties will improve when hardened by carbonation. It will be more certain.

Further, when the BET specific surface area of the inorganic cured body is 50 to 180 m ² / g, or a porous material having an average pore diameter of 0.1 to 100 nm is contained in the inorganic cured body, Since the moisture absorption and desorption properties are further improved by the fine pores, the above effect is further ensured.

  When the porous material is attapulgite, the above effect is further ensured because the hygroscopic performance and moldability are improved when combined with a carbonized tissue.

  The ceiling structure of the present invention is a ceiling structure in which the ceiling panel is used, and is characterized in that the ceiling panel is attached to the surface of a ceiling base material. It is possible to obtain a light and high-strength ceiling structure having excellent moisture absorption and desorption properties that can provide sufficient humidity control performance.

  When at least one pair of parallel sides of the ceiling panel has an actual shape or an open shape, a ceiling structure with good workability can be obtained in addition to the above effects.

  A ceiling panel composite plate in which a plate-like body having an area smaller than that of the ceiling panel is offset and projected outward from at least one of the four sides of the ceiling panel is attached to the surface of the ceiling base material. When mounted so as to be on the indoor side, and further when at least one pair of parallel sides of the plate-like body has an open shape, there is no need to post-process the end of the ceiling panel itself, In addition to the above effects, a ceiling structure with good productivity can be obtained.

  A plate-like body having at least one pair of sides parallel to each other and having an area that is not larger than the ceiling panel is projected out of the ceiling-shaped convex side of the ceiling panel and protrudes outward. When the ceiling panel composite board pasted so that it is attached to the surface of the ceiling base material so that the ceiling panel is on the indoor side, unevenness between the ceiling panels is less likely to occur when constructed. By reducing the thickness of the ceiling panel, the weight can be reduced and a ceiling structure with good workability can be obtained.

  Furthermore, a through-hole is provided on the surface of the plate-like body that protrudes from the ceiling panel, and the ceiling panel composite plate is placed on the surface of the ceiling base material and the ceiling panel is on the indoor side by the metal fittings passed through the through-hole. If installed, a ceiling structure with good workability can be obtained.

  From the above, in the ceiling panel affixing work, the need to use an expensive adhesive having high adhesive strength is reduced, temporary holding until the adhesive is cured is unnecessary or reduced, and between ceiling panels Work such as joint alignment and tension adjustment can be facilitated.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the ceiling structure of the present invention, the ceiling panel is attached to the surface of the ceiling base material, and, as illustrated in FIG. , 4... And the field edges 5, 5..., The ceiling panels 1, 2.

  According to the above ceiling structure, since the ceiling panels 1, 1... Have high moisture absorption / release performance, the humidity of the room can be adjusted within a comfortable range of 40 to 70% as an indoor environment. .

  As the ceiling base material 2, 2,..., A plaster board is usually preferably used.

  Although it does not specifically limit as thickness of the said ceiling panel 1,1, ..., In order to ensure high moisture absorption / release performance, it is preferable that it is 3 mm or more. Although it does not specifically limit as a magnitude | size of the ceiling panels 1,1, ..., In order to make it difficult to take out ceiling workability or an end material, it is preferable that it is 300 mm square or more.

  The method of attachment to the ceiling base material 2, 2,... Is not particularly limited, but if it is attached only with an adhesive, the adhesive strength may be insufficient, so it may be attached with nails, screws, screws, tuckers, etc. Or in combination with an adhesive.

  In the ceiling structure, as illustrated in FIGS. 2 and 3, actual shapes 11 and 12 in which at least one pair of sides of two sets of parallel sides of the ceiling panels 1,. It is preferable that the ceiling panels 1, 1... Adjacent to each other can be engaged with each other.

  In the above ceiling structure, as illustrated in FIGS. 4 and 5, at least one set of two parallel sides of the ceiling panels 1, 1... Can be fitted with an adjacent panel 13. , 14 is preferable in that the adjacent ceiling panels 1, 1... Can be engaged with each other. Moreover, since the thickness of a ceiling panel can be made thin from a viewpoint of intensity | strength compared with a real shape, it can reduce in weight.

The manufacturing method of the actual shapes 11 and 12 and the gap shape 13 and 14 is not particularly limited. For example, a method of post-processing using a cutting tool after manufacturing a ceiling panel made of a rectangular inorganic cured body, Or it can produce by the method etc. which expand | deploy and press-mold an inorganic material raw material in the division | segmentation mold which has a desired real shape or an abrupt shape, and harden | cure after shaping.

  When the ceiling panels 1, 1... Are made of an inorganic cured body cured by carbonation, light weight and high strength are obtained together with excellent moisture absorption and desorption, so that the actual shape 11, 12 or the open shape 13, This is preferable in that a ceiling structure in which the portion 14 is not easily cracked or chipped by engagement can be obtained.

  As shown in FIGS. 6 and 7, the ceiling structure has plate-like bodies 6, 6... That are not larger in area than the ceiling panels 1, 1. The ceiling panel composite plates 7, 7... That stick out and are shifted outward from at least one side of the inside are placed on the surface of the ceiling base material 2, 2. It may be attached to. In this case, the ceiling panels 1, 1,... Themselves do not require any post-processing and can be engaged only by attaching the plate-like bodies 6, 6,.

  The plate-like materials 6, 6,... Are not particularly limited, but are preferably made of materials and thicknesses that can be directly nailed with nails, screws, drilling tapping screws, etc., for example, plywood, gypsum board, etc. due to moisture Examples include those that do not change quality and aluminum plates that have low moisture permeability.

  The method for attaching the plate-like materials 6, 6 .. and the ceiling panels 1, 1... Is not particularly limited. For example, the plate-like materials 6,. In doing so, an insert molding method may be used in which the plate-like materials 6, 6,.

  The above-mentioned ceiling panel composite plates 7, 7,... Are, for example, as shown in FIG. Hereinafter, it is constructed by fitting so as to overlap each other.

  Further, as illustrated in FIGS. 8 and 9, the ceiling structure is not larger in area than the ceiling panels 1, 1... When the ceiling panels 1, 1. The plate-like bodies 6, 6,... Project from the convex side 131 of the ceiling panel 1, 1,..., And the end of the ceiling panel composite has an actual shape as a whole. In this way, the bonded ceiling panel composite plates 7, 7,... Are attached to the surfaces of the ceiling base materials 2, 2,. There may be. In this case, it is possible to achieve the actual shape as a whole while making the ceiling panels 1, 1,. Further, the unevenness of the mating portion is reduced as compared with the ceiling structure of FIG. 7, and a ceiling structure with a favorable ceiling surface can be realized.

  Further, as illustrated in FIG. 10, the plate-like bodies 6, 6... May not be a single sheet but may be a plurality of strips.

  The above-mentioned ceiling panel composite plates 7, 7,... Are formed on the ceiling side of the ceiling panel 1, 1,. It is constructed by fitting so that the surface (hereinafter also referred to as “back surface”) overlaps.

  In the above-mentioned ceiling panel composite plate, as shown in FIGS. 11 and 12, at least one pair of parallel sides of the plate-like bodies 6, 6. If it has, it is suitable at the point which can mutually engage the ceiling panel composite board 7,7 ... which adjoins mutually.

  In the above-mentioned ceiling panel composite plates 7, 7,..., Through holes 8, 8,... Are formed on the projecting surfaces of the plate-like bodies 6, 6,. The ceiling panel composite plates 7, 7,... Are attached to the surface of the ceiling base material 2, 2,... By metal fittings 9, 9,. It is further preferable that the ceiling panel composite plates 7, 7,... Can be more firmly attached to the ceiling base materials 2, 2,. As the metal fittings 9, 9,..., For example, nails, screws, drilling tapping screws and the like are preferably used.

  The ceiling of the present invention has the above ceiling structure. According to the ceiling of the present invention, since the ceiling panel used in the ceiling structure has excellent moisture absorption / release performance as described above, the humidity in the room can be adjusted to a comfortable state.

  The present invention will be specifically described below by showing examples and comparative examples.

In addition, this invention is not limited only to the following Example.
(Example 1)
Dihydrate gypsum (average particle size 12.5 μm) 1000 g (100 parts by weight), wollastonite mineral pulverized product (specific surface area 4.9 m ² / g, average particle size 2.6 μm) 300 g (30 parts by weight), attapulgite ( Showa Chemical Co., Ltd., product number # 2) 600 g (60 parts by weight) and water 180 g (18 parts by weight) were weighed, and these were measured with a Henschel mixer (“FM20-CI type” manufactured by Mitsui Mining Co., Ltd., capacity 20 L). The inorganic material was adjusted by mixing for 30 seconds at a linear velocity of 10 m / s. After 1125 g of this mixture was uniformly spread in a 300 mm × 300 mm flat plate forming aluminum mold and fitted with a core, press molding (surface pressure 41 Mpa, pressurization time 2 minutes) was performed to produce a shaped body. The obtained shaped body was subjected to carbonic acid curing treatment at a pressure of 1 MPa and a treatment temperature of 90 ° C. for 30 minutes to obtain a ceiling panel.

(Example 2)
Example 1 except that wollastonite was 55 parts by weight, attapulgite was 37 parts by weight, water was 20 parts by weight, and the carbonation conditions were pressure 0.9 MPa, treatment temperature 110 ° C., treatment time 20 minutes. And got a ceiling panel.

(Example 3)
A ceiling panel was obtained in the same manner as in Example 1 except that attapulgite was 70 parts by weight.

Example 4
A ceiling panel was obtained in the same manner as in Example 1 except that 43 parts by weight of wollastonite, 49 parts by weight of attapulgite and 8.5 parts by weight of water were used, and the treatment temperature was 60 ° C.

(Example 5)
A ceiling panel was obtained in the same manner as in Example 1 except that 12 parts by weight of wollastonite, 80 parts by weight of attapulgite, and 18 parts by weight of water were used. The cured product was slightly insufficiently cured.

(Example 6)
A ceiling panel was obtained in the same manner as in Example 1 except that the treatment temperature was 20 ° C. as the carbonation treatment conditions. The cured product was slightly insufficiently cured.

(Comparative Example 1)
A ceiling panel was obtained in the same manner as in Example 1 except that 50 parts by weight of wollastonite and 7 parts by weight of water were used without using attapulgite.

  About the said Example and comparative example, the density of the shaped body, the external appearance, the specific surface area of the hardening body, hygroscopicity, and bending strength were evaluated. The evaluation results are shown in Table 1.

  Moreover, as a result of producing the ceiling which has the ceiling structure shown in FIG. 1 using the ceiling panel of Example 2, and evaluating the indoor humidity control condition, it confirmed that relative humidity was adjusted to 40 to 70%.

  As shown in Table 1, in the embodiments of the present invention, a ceiling panel having a sufficient panel surface moisture absorption amount and sufficient strength can be obtained, and high humidity control performance can be exhibited simply by installing it on the ceiling surface of the room. It has been found.

It is a model perspective view which shows an example of the ceiling structure of this invention. It is a schematic diagram which shows an example of the ceiling panel (actual shape) which concerns on this invention. It is a schematic cross section which shows an example of the ceiling structure using the ceiling panel shown in FIG. It is a schematic diagram which shows an example of the ceiling panel (aijakuri) which concerns on this invention. It is a schematic cross section which shows another example of the ceiling structure using the ceiling panel shown in FIG. It is a schematic diagram which shows an example of the ceiling panel composite board using the ceiling panel of this invention. It is a schematic cross section which shows an example of the ceiling structure using the ceiling panel composite board shown in FIG. It is a schematic diagram which shows another example of the ceiling panel composite board using the ceiling panel (aijakuri) of this invention. It is a schematic cross section which shows an example of the ceiling structure using the ceiling panel composite board shown in FIG. It is a schematic diagram which shows another example of the ceiling panel composite board (strip shape) using the ceiling panel of this invention. It is a schematic diagram which shows another example of the ceiling panel composite board (a board is open) using the ceiling panel of this invention. It is a schematic cross section which shows an example of the ceiling structure using the ceiling panel composite board shown in FIG. It is a schematic diagram which shows another example of the ceiling panel composite board (through-hole) using the ceiling panel of this invention. It is a schematic cross section which shows an example of the ceiling structure using the ceiling panel composite board shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceiling panel 2 Ceiling base material 3 Suspended tree 4 Field edge receiving 5 Field edge 6 Plate body 7 Ceiling panel composite board 8 Through-hole 9 Metal

Claims (12)

It is a ceiling panel made of an inorganic hardened body, and the surface corresponding to the indoor side of the ceiling panel absorbs moisture when absorbed at a relative humidity of 50% for 24 hours under a temperature condition of 25 ° C. and 24 at a relative humidity of 90%. ceiling panels absolute value of the difference between the moisture absorption when is time moisture is characterized by comprising the inorganic cured body is 250~1000g / m ^2.   The ceiling panel according to claim 1, wherein the inorganic cured body is cured by carbonation.   The ceiling panel according to claim 1, wherein the inorganic cured body is obtained by curing an inorganic material made of wollastonite by carbonation. The ceiling panel according to claim 1, wherein the inorganic cured body has a BET specific surface area of 50 to 180 m ² / g.   The ceiling panel according to any one of claims 1 to 4, wherein the inorganic cured body contains a porous material having an average pore diameter of 0.1 to 100 nm.   6. The ceiling panel according to claim 5, wherein the porous material is attapulgite.   The ceiling panel according to any one of claims 1 to 6, wherein at least one pair of parallel sides is an actual shape or an abrupt shape.   A ceiling structure using the ceiling panel according to claim 1, wherein the ceiling panel is attached to a surface of a ceiling base material.   The ceiling structure using the ceiling panel according to any one of claims 1 to 6, wherein a plate-like body having an area larger than that of the ceiling panel is from at least one of the four sides of the ceiling panel. A ceiling structure characterized in that a ceiling panel composite plate bonded so as to protrude outwardly is attached to a surface of a ceiling base material so that the ceiling panel is on the indoor side.   The ceiling structure according to claim 9, wherein at least one pair of parallel sides of the plate-like body has an open shape.   A ceiling structure using a ceiling panel in which at least one pair of parallel sides has an abrupt shape is used, and a plate-like body having an area larger than that of the ceiling panel is a convex shape convex side of the ceiling panel A ceiling panel composite board that protrudes outward from the side and is pasted so as to have a real shape is attached to the surface of the ceiling base material so that the ceiling panel is on the indoor side. Construction. A through-hole is provided in the surface of the plate-like body protruding from the ceiling panel, and the ceiling panel composite plate is attached to the surface of the ceiling base material by the metal fitting passed through the through-hole so that the ceiling panel is on the indoor side. The ceiling structure according to any one of claims 9 to 11, wherein the ceiling structure is provided.

Images