JP5286603B2 - Surface finish building materials - Google Patents

Description

The present invention relates to a table instrumentation finishing construction materials, details are directed to configured mounting finishing building materials with the upper mounted finish sheet being construction etc. interior finish surface of a building.

As an interior finishing technique on the indoor wall surface of a building, a finishing sheet such as PVC cloth or wallpaper is pasted on the surface of an interior base material made of gypsum board or the like.
Techniques have been proposed in which a coating material containing a material having excellent humidity control properties such as siliceous shale is applied as a cover finish sheet, or a humidity control material is added to the sheet material itself. In this way, the surface finish sheet with a humidity control function absorbs excess moisture in the construction space and holds it, or releases the retained moisture to the construction space that has been dried too much. Performs humidity control function to maintain constant. If a material having a deodorizing property or a gas adsorbing property is used as the humidity control material, it is possible to remove the odor of the construction space or to perform the VOC removal function.

For example, in Patent Document 1, the humidity control function and the deodorizing function of natural diatomaceous earth are improved by forming a mixture layer of EVA resin, natural diatomaceous earth, thermal expansion foaming agent, etc. on the surface of wallpaper base paper. Techniques that can be demonstrated have been proposed.
In Patent Document 2, as a wall covering material excellent in deodorizing properties, a hydrous magnesium silicate clay mineral is blended, and a vent hole that connects the clay mineral and the atmosphere is provided, so that the clay mineral has an excellent deodorizing property. Technologies that demonstrate their functions have been proposed.
JP 2001-336094 A JP-A-6-166705

In the conventional technology for a surface finishing sheet provided with a humidity control function and a deodorizing function, there is a problem that the surface of the surface finishing sheet is easily soiled or difficult to wipe off in a construction state.
A humidity control material or adsorbing material having a fine porous structure is exposed on the surface of the cover finish sheet. The porous material can exhibit humidity control and deodorizing properties by having fine pores and irregularities on the surface. If dirt enters these fine pores and irregularities, the dirt cannot be wiped off even if the surface is wiped. For example, drinks such as coffee and liquid seasonings such as sauce are rapidly absorbed into the porous material having high water absorption. Since the porous material is a material that has excellent liquid absorbency and high adsorbability of various substances, the liquid and the solid component contained in the liquid are easily absorbed and adsorbed and retained. Moreover, since it is excellent in moisture absorption / release properties, only the water contained in the liquid evaporates, and the remaining coloring components and the like are easily trapped inside the pores of the porous material. Therefore, once attached or absorbed dirt is very difficult to remove.

A cover sheet with a porous material exposed on the surface also has a problem that it is easily damaged when it is rubbed or bumped. There are many brittle materials in the porous material, and the fine powder of the porous material blended in powder form is likely to be scraped off.
For this reason, the cover finish sheet provided with a humidity control function may be difficult to withstand long-term use after construction, or may need to be replaced or reattached at relatively short intervals.
The object of the present invention is to provide a surface finishing sheet having a humidity control function as described above, without greatly impairing the humidity control function, etc. It is possible to maintain a good appearance throughout.

The exterior finishing building material according to the present invention comprises a humidity conditioning building material board having a humidity control function, and a surface finishing sheet adhered to the surface of the humidity conditioning building material board,
The surface finishing sheet is a surface finishing sheet constituting the surface of a building, and is disposed on the surface of the base sheet and the base sheet, diatomaceous mudstone, diatom shale, allophane, silica gel, imogolite, sepiolite, from at least one inorganic porous particulate material and a synthetic resin and colloidal silica having a particle size 0.001~1.0μm and / or Aruminazo coating of an aqueous coating material comprising an Le selected from the group consisting of zeolites and Oya A surface finish layer having moisture conditioning properties and a moisture permeable and waterproof surface, and the base sheet is made of a material having moisture permeability.
[Building surface]
The front surface is a finished surface exposed on the surface of a building structure such as an indoor wall surface, a partition surface, a ceiling surface, a floor surface, or a column surface in various buildings such as ordinary houses. Usually, it is an interior finish surface inside a building, but it may be applied to an exterior finish surface.
A base material is often applied to such a finished surface.

[Base material]
It becomes the groundwork for constructing the cover finish sheet. It may be a structural member itself such as a building frame, a pillar, or a beam, or may be a panel-like base plate that covers the surface of the structural member.
As the material of the base material, the same material as a structural member or base material in a normal building can be used. Specific examples include concrete, steel, cement board, gypsum board, fiber accumulation board, particle board, and plywood.
As the base material, a material having air permeability and moisture absorption / release properties can also be used. Combining with a cover finish sheet can provide air permeability to the interior space of the building structure such as the inside of the wall surface, and allow moisture to enter and exit. For example, humidity control gypsum board etc. are mentioned. By using the humidity control base material, the humidity control function of the surface finish layer and the humidity control function of the humidity control base material are synergistically exhibited. A surface-finished sheet having a very high humidity control function, in particular, a moisture absorption / release amount and a moisture absorption / release rate can be formed.

[Base material sheet]
This is the basic structure of the finishing sheet.
The same material and structure as a normal cover finish sheet can be applied.
As a material for the base sheet, it is only necessary that the surface finish layer can be formed and supported. Specifically, paper, non-woven fabric, knitted fabric, synthetic resin sheet and the like can be used. A laminated sheet in which a plurality of material layers are laminated can also be used.
More specifically, examples of the paper include high-quality paper, glassine paper, tracing paper, Japanese paper, cast paper, coated paper, natural pulp paper, impregnated paper, laminated paper, and the like. Synthetic resin sheets such as polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polymethyl methacrylate, polycarbonate, polyolefins (ethylene vinyl acetate copolymer, ethylene-acrylic acid copolymer, olefin thermoplastic elastomer, etc.), modified polystyrene , Impact-resistant polystyrene, ABS resin and the like.

  If the base sheet is a material having air permeability or moisture permeability, air permeability or moisture permeability can be imparted between the front and back of the cover finish sheet. It enables ventilation and exchange of moisture between the interior of the wall surface where the cover finish sheet is constructed and the interior space. Moisture in the indoor space can be released into the wall space. Functions such as humidity control or deodorization with respect to the air passing through the cover finishing sheet can be enhanced. On the contrary, if the base sheet is a non-breathable or non-breathable material, it is possible to block moisture from entering the interior of the wall surface. In order to impart breathability or moisture permeability to the base material sheet, it is possible to use gaps between fibers such as nonwoven fabrics and knitted fabrics and spaces between fabrics, or resin sheets and porous sheets having open cells.

Although the thickness of a base material sheet changes with materials and required performance, it can usually be set to 0.2-2.0 mm.
If an adhesive layer or a pressure-sensitive adhesive layer is provided on the back surface of the base sheet, the construction of the cover finish sheet is facilitated. For the adhesive layer and the pressure-sensitive adhesive layer, the same material and structure as those of a normal cover finish sheet can be applied. A rewetting adhesive or a hot melt adhesive can also be used.
[Surface finish layer]
It is arrange | positioned on the surface of the said base material sheet, and while the surface is moisture-permeable and waterproof, it has humidity control. That is, moisture easily passes from the surface of the surface finish layer to the inside, but the surface is waterproof and does not swell or lose strength due to water absorption. Liquids such as water and fine granular solids cannot easily penetrate from the surface to the inside. And the moisture control function by the moisture absorption-and-release function which absorbs and holds the moisture which permeate | transmitted inside, or discharge | releases the absorbed and held moisture to the exterior is achieved.

The surface finishing layer can be composed of a single layer having a moisture permeable and waterproof surface as a whole, and a humidity control layer that is disposed on the side close to the base sheet and performs a humidity control function. And a multilayer structure with a moisture-permeable and waterproof transparent coating layer disposed on the surface of the humidity control layer.
[Humidity control layer]
It arrange | positions on the surface of a base material sheet, and an inorganic porous granular material is mix | blended. Basically, the technology of ordinary humidity control walls and humidity control building materials can be applied.
<Inorganic porous powder>
It is a material that performs the humidity control function in the surface finishing layer.

A normal humidity-controlling inorganic porous material used in the construction field or the like can be used. Specific examples include diatomaceous mudstone, diatom shale, allophane, silica gel, imogolite, sepiolite, zeolite, and Otani stone. A plurality of materials can be combined. An inorganic porous material having an average pore diameter of 20 to 200 mm and a specific surface area of 20 to ²⁰⁰ m ² / g is preferable because it has a high humidity control capability and can also exhibit a deodorizing function, a VOC removing function, and the like.
The inorganic porous material may be produced as a natural mineral or may be fired. By firing, characteristics such as color can be stabilized. A modified one can also be used.

The inorganic porous material is used in the form of powder. What is powder from the time of production can be used as it is, and it can be used after being crushed if it is a rock mass. The particle size of the inorganic porous powder can usually be set to 2 mm or less.
<Material composition of humidity control layer>
In order to give a sufficient humidity control function to the humidity control layer, it is desirable to blend the inorganic porous powder in the range of 5 to 80% by weight with respect to the entire humidity control layer.
Various materials mixed in a normal humidity control layer can be combined except that the inorganic porous granular material is essential. In order to enhance the humidity control function, it is preferable to blend 20% by weight or more. In order to improve stain resistance, 60% by weight or less is preferable.

<Humidity-control coating material>
The humidity control layer is formed by coating the surface of the base sheet and drying and curing.
Basically, materials and blends that are common to normal architectural humidity control coating materials can be used.
As a blending of the humidity control coating material, 5 to 80% by weight of the inorganic porous granular material and 5 to 70% by weight of the organic binder can be included.
The organic binder achieves coating properties and coating performance. As the organic binder, a synthetic resin material for a porous resin coating layer described later can be used. An inorganic binder blended in a humidity control coating material for ordinary wall coating is not preferable because it impairs the flexibility of the finishing sheet for covering.

By blending a fiber material composed of natural fiber, synthetic fiber or inorganic fiber, the strength and durability of the coating film can be improved, or the surface texture can be changed.
In addition, the colorant, preservative, antifungal agent, antifoaming agent, dispersant, thickener, antproofing agent, etc. should be used in combination as appropriate for the ingredients of the humidity control coating material. Can do. By adding a trace amount of radiation mineral, it is possible to improve the humidity control function and the negative ion release function.
The humidity control coating material is applied to the base sheet in the form of a kneaded product or a liquid.
<Function of humidity control layer>
Humidity control, which is a function of the humidity control layer, can be evaluated by moisture absorption ability and moisture release ability. Specifically, it is desirable that the moisture absorption / release amount evaluated by the smaller value of the moisture absorption amount and the moisture release amount is 50 g / m ² · 24 h or more.

The moisture absorption / release amount of the humidity control layer also varies depending on the thickness of the humidity control layer. The film thickness after drying can be set in the range of 100 to 2000 μm. It is desirable that the moisture absorption / release amount can be achieved within this thickness range.
The thickness of the humidity control layer is also changed by the presence of the base sheet. When the base sheet has humidity control, the humidity control capability of the humidity control layer may be relatively small.
The humidity control layer can be provided with various functions for improving the air environment such as deodorization and VOC removal function in addition to humidity control.
(Transparent coating layer)
It is arranged on the surface of the humidity control layer and has moisture permeability and waterproofness.

Moisture permeability is also a property of allowing water vapor, that is, vapor, to pass through, which can be said to be water vapor permeable. Waterproofing is a property that allows water to pass through even if it touches the surface, maintaining the properties such as the original strength and durability without melting, altering, or swelling the material of the humidity control layer. . It is desirable that the liquid water is impermeable so that it does not easily pass through to the extent that the various functions of the humidity control layer are not impaired. It is a transparent layer with such characteristics.
The thickness of the transparent coating layer varies depending on the material used and required performance, but can usually be set to 5 to 100 μm. It is better to make it relatively thick in order to increase the protective function and waterproofness of the humidity control layer, and it is better to make it relatively thin in order to improve moisture permeability. If it is too thin, the surface of the humidity control layer having porous irregularities cannot be sufficiently covered, and functions such as contamination prevention are deteriorated. If it is too thick, the air permeability is hindered, so that the humidity control effect of the humidity control layer is impaired, and there is a drawback that cracks are likely to occur in the coating film.

The water vapor permeability for evaluating the moisture permeability of the transparent coating layer is preferably 400 g / m ² · 24 h or more. More preferably, the water vapor permeability is 1000 g / m ² · 24 h or more. Those having a surface hardness of 3B to 3H are less likely to be scratched or worn on the surface of the surface finishing layer.
As the transparent coating layer, a porous resin coating can be used.
<Porous resin coating>
The porous resin film uses synthetic resin as a basic film-forming material, but is not a dense film like a normal synthetic resin film, and has a porous structure with innumerable fine pores.
With such a porous structure, the water vapor permeability is excellent, and at the same time, the water resistance is excellent, and the water-impermeable property can be exhibited. The properties of the porous resin coating vary depending on the pore size and distribution of the porous structure, the pore shape, and the like.

As a material for forming the porous resin film, fine inorganic particles having a particle diameter of 0.001 to 1.0 μm are 10 to 200% by weight of the solid content of the aqueous emulsion in an aqueous emulsion containing 30 to 60% by weight of a synthetic resin. A water-based transparent coating material blended in proportions can be used. The presence of fine inorganic particles causes the shrinkage and hardening of the resin film partially isolated at the location of the fine inorganic particles during film formation, and a porous structure is formed without forming a uniform resin film. Will be.
The synthetic resin is at least one synthetic resin selected from the group consisting of acrylic resins, silane-based acrylic resins, acrylic-styrene resins, and silane-based acrylic-styrene resins, and has a glass transition point Tg of 10 ° C. or lower. Material can be used. Since the glass transition point is low, the film formability during coating becomes good. A transparent coating material containing fine inorganic particles having no ability to form a coating film has a function of forming a film with a synthetic resin. When the glass transition point is too high, the film forming property of the transparent coating material is deteriorated. A transparent coating material that is coated and cured at room temperature must be able to exhibit sufficient film forming properties at about room temperature. In the case where the transparent coating material is cured by heating, it is sufficient that sufficient film forming properties can be exhibited at the heating temperature at that time.

The form of the synthetic resin is not particularly limited. For example, it can be supplied in the form of independent synthetic resin particles, but is usually produced in the form of an aqueous emulsion in which synthetic resin particles are dispersed in an aqueous medium at the time of production of the synthetic resin. In form, it can be supplied to the production of transparent coating materials.
Examples of the fine inorganic particles include colloidal silica, titanium oxide sol, alumina sol, and iron oxide sol. Although depending on the particle size, a material having as high a transparency as possible can enhance the transparency of the transparent coating layer. A material excellent in dispersibility in a transparent coating material and adhesion to a synthetic resin is preferable. Among the materials, colloidal silica is easy to handle and has excellent performance.

When the particle diameter of the fine inorganic particles is too large, it is difficult to adsorb on the surface of the resin particles during film formation, and it is difficult to form pores with a desired size and amount in the resin film. When the particle size is too small, it is difficult to produce and it is difficult to uniformly disperse it in the transparent coating material. In the said particle size range, 0.002-0.1 micrometer is further preferable.
If the blending amount of the fine inorganic particles in the transparent coating material is too small, it is difficult to form the target porous structure, and the water vapor permeability of the transparent coating layer is deteriorated. When there are too many fine inorganic particles, the film-forming property of a transparent coating material will fall, and the waterproofness of a transparent coating layer will worsen. It is more preferable that the fine inorganic particles are 15 to 160% by weight of the aqueous emulsion solid content in the blending ratio range.

In addition to the above materials, the transparent coating material is blended with various additive materials blended into a normal coating material. Specifically, a thickener, an emulsifier, an antifoamer, etc. are mentioned.
As a technique for producing a transparent coating material for forming a porous resin film, the technique disclosed in Japanese Patent Publication No. 7-110906 can be used. The trade name “Movinyl 8000 series” available from Clariant Polymer Co., Ltd. can be used.
[Built-in waterproof and moisture conditioning layer]
The surface is a single layer that is moisture permeable and waterproof, and that is entirely moisture conditioned.
It can be configured by combining the material of the humidity control layer and the material of the transparent coating layer.

Specifically, the coating film formed by applying an aqueous coating material containing an inorganic porous granular material, a synthetic resin, and fine inorganic particles having a particle diameter of 0.001 to 1.0 μm is prepared as a whole. While having a moisture function, the surface can be moisture permeable and waterproof. As a matter of course, the moisture permeable waterproof / humidity adjusting layer is not transparent.
The materials and blends used are the same as those for the humidity control layer and the transparent coating layer. It is sufficient to mix the material of the humidity control layer and the material of the transparent coating layer. In accordance with the intended function, a case where each is formed as a separate layer and a part of the composition can be changed.
For example, by making the surface waterproof and moisture permeable sufficiently, even if the humidity control property is slightly lowered, it can be supplemented by another means. Specifically, if a base material sheet having a humidity control function is disposed on the back surface of a surface finishing layer composed of a moisture permeable / waterproof / humidity control layer, humidity control can be improved. In order to improve the stain resistance, the blending amount of the inorganic porous granular material in the moisture permeable waterproof / humidity controlling layer is set to 60% by weight or less in the blending amount range in the humidity controlling layer described above. It is preferable.

[Surface finish sheet]
Except for having the above-described surface finishing layer, the same structure, shape, and manufacturing method as those of a normal surface finishing sheet can be applied.
What is necessary is just to apply a normal coating technique to the surface of the base material sheet manufactured or prepared previously, and to form a surface finishing layer. When the surface finish layer has a humidity control layer and a transparent coating layer, each layer may be formed sequentially.
Specifically, the following steps can be combined.
The process (a) of forming the humidity control layer in which the inorganic porous granular material is blended on the surface of the base sheet.

A step (b) of applying a transparent coating material, which becomes a transparent coating layer having moisture permeability and waterproofness, to the surface of the humidity control layer having a moisture content of 20% or less and drying and curing it;
In step (b), it is important to set the moisture content of the humidity control layer to 20% or less.
If the moisture content of the humidity control layer is too high, the moisture contained in the humidity control layer tends to cause a problem that the coating film of the transparent coating material coated thereon is devitrified. The water vapor permeability of the formed transparent coating layer is also lowered. If the moisture content is in a sufficiently low and dry state, the transparent coating material can be applied satisfactorily, and the performance of the formed transparent coating layer can be exhibited well.
As a means for forming a transparent coating layer by applying a transparent coating material on the surface of the humidity control layer, a normal coating technique can be applied. For example, a coating (a knife coater, a gravure coater, a screen coater, a roll coater, a flexo coater, etc.) can be employed. Blade coaters, bar coaters and curtain coaters can also be used. Application (using rollers, sprays, brushes, mops, sponges, waste cloths, etc.), dipping, etc. can also be employed. With these methods, a transparent coating layer can be formed by applying a transparent coating material and drying it. If necessary, it can be embossed. Foaming or pattern printing can be performed before embossing.

The exterior finish building material according to the present invention has a moisture permeable and waterproof surface and is provided with an exterior finish layer having humidity control properties, so that when applied to interior finishing of an indoor wall of a house, the construction environment It is possible to adjust the humidity appropriately so that the humidity does not become excessively high or dry, and it is difficult for the surface to get dirty, and it is possible to easily remove such dirt by wiping it off.
As a result, excellent appearance and surface properties can be maintained well over a long period of time. It is possible to greatly extend the period for reattaching the cover finishing sheet and reduce the cost required for building maintenance.

  Moreover, since a surface finishing sheet | seat has air permeability, it is excellent also in the sound absorption characteristic.

1, 2, the interior finish of the indoor wall surface of residential, showing a state in which construction the table instrumentation finished sheet S. FIG. 1 shows a reference example of the present invention, and FIG. 2 shows an embodiment of the present invention. The left side of the figure is the interior space, and the right side is the internal structure of the wall.
[Surface finishing sheet S]
As the base sheet 10, a sheet material having air permeability such as paper or nonwoven fabric is used.
A surface finishing layer 20 is formed on the surface of the base sheet 10. The surface finish layer 20 includes a humidity control layer 24 adjacent to the base sheet 10 and a transparent coating layer 22 disposed on the surface of the humidity control layer 24.
The humidity control layer 24 is formed by applying a coating wall material containing an inorganic porous granular material such as siliceous shale to the base sheet 10 and drying and curing it. The surface of the formed humidity control layer 24 expresses natural texture and color peculiar to the blended shale.

The transparent coating layer 22 is formed of a fine inorganic material in an aqueous emulsion containing a synthetic resin when the moisture content of the humidity control layer 24 is sufficiently released after the humidity control layer 24 is applied and formed and the water content becomes 20% or less. It is formed by painting and drying and curing a transparent coating material containing particles. Since the transparent coating layer 22 is transparent, the surface appearance of the surface finishing layer 20, that is, the surface finishing sheet S is a state in which the texture and color of the humidity control layer 24 are expressed as they are.
[Interior finishing construction]
In FIG. 1, the cover finishing sheet S is applied to the interior surface of a wall frame, a column, a frame member, etc., not shown. It is affixed to the surface of a gypsum board, a fiber board, etc. constructed as the interior base material 40 with an adhesive.

  When the humidity is excessively high in the interior space where the surface finishing work is performed, the moisture is a transparent coating layer 22 having a high water vapor permeability in the surface finishing layer 20 disposed on the surface of the surface finishing sheet S. , Enters the humidity control layer 24 and is absorbed and held by the inorganic porous granular material of the humidity control layer 24. The humidity of the indoor space is lowered, and the humidity becomes comfortable for residents. Thereafter, when the indoor space is too dry, the moisture absorbed and held in the humidity control layer 24 passes through the transparent coating layer 22 and is released into the indoor space. The indoor space returns to a state containing moderate moisture, and a comfortable environment for the occupants is obtained. Further, the humidity control layer 24 containing siliceous shale has a function of adsorbing and removing odors and VOCs in the indoor space, a negative ion release function, and the like, and can effectively improve the environment of the indoor space.

When water is used in the indoor space or when cooking or eating or drinking is performed, water, seasonings, fruit juice, or the like may adhere to the surface of the cover finishing sheet S. A liquid such as water adhering to the surface of the transparent coating layer 22 cannot pass through the non-water-permeable transparent coating layer 22 and enter the humidity control layer 24. If the liquid is wiped off from the surface of the transparent coating layer 22, the surface of the cover finish sheet S returns to its original clean state. Fine solids such as dust cannot pass through the transparent coating layer 22 and remain on the surface, so that they can be easily wiped off.
In addition, if the humidity control layer 24 composed of siliceous shale is exposed on the surface of the surface finishing sheet S, it is easy to be scratched or chipped when it hits or scratches, but it has a transparent coating. As long as it is covered with the layer 22, it is not easily damaged by a slight external force or friction.

As a result, the facing sheet S can maintain a good humidity control function and excellent appearance over a long period of time.
Further, the cover finish sheet S is air permeable because both the transparent coating layer 22 and the humidity control layer 24 have fine holes. For this reason, the sound absorption characteristics for absorbing the sound generated in the indoor space are also excellent.
[Built-in waterproof and moisture conditioning layer]
The embodiment shown in FIG. 2 is a cover finishing sheet S having a transparent coating / humidity control layer.
On the surface of the same base sheet 10 as in the above-described embodiment, a moisture permeable waterproof / humidity adjusting layer 26 is formed as a surface finishing layer 20.

It is formed by applying a coating material to be the moisture permeable waterproof / humidity adjusting layer 26 on the surface of the base sheet 10 and drying and curing it. The coating material is a mixture of the material of the transparent coating material and the material of the humidity control layer in the embodiment.
The moisture permeable waterproof / humidity controlling layer 26 is blended with an opaque inorganic porous granular material, and therefore is not transparent but opaque as a whole. However, the synthetic resin and fine inorganic particles which are the materials of the transparent coating material are substantially transparent. As a result, the moisture-permeable waterproof / humidity controlling layer 26 in the formed state expresses the color and texture of the siliceous shale used for the inorganic porous granular material.
Also in this embodiment, excessive moisture in the indoor space is absorbed and retained by the moisture permeable waterproof / humidity controlling layer 26, or moisture is released from the moisture permeable waterproof / humidity controlling layer 26 to the indoor space. The humidity environment can be adjusted to a certain range suitable for living.

In addition, since the surface of the inorganic porous granular material is covered with a transparent film formed of synthetic resin and fine inorganic particles, water attached to the surface of the moisture permeable waterproof / humidity controlling layer 26, etc. The liquid does not penetrate into the moisture permeable waterproof / humidity controlling layer 26. By simply wiping off the surface of the moisture permeable waterproof / humidity controlling layer 26, the surface of the cover finishing sheet S can be maintained in a beautiful state indefinitely.
Also in this embodiment, the moisture permeable waterproof / humidity adjusting layer 26 has fine holes and thus has air permeability and excellent sound absorption characteristics.
[Surface finishing building materials]
The embodiment shown in FIG. 3 shows a board-like surface finishing construction material constructed using the surface finishing sheet S.

A surface finish sheet S is affixed to the surface of a rectangular plate-shaped humidity-conditioning building material board 50 made of gypsum board mixed with an inorganic humidity-controlling material such as siliceous shale. The structure of the cover finishing sheet S has the structure shown in FIG. 1 or FIG. The base sheet 10 of the cover finishing sheet S is attached to the humidity control building material board 50 with an adhesive or the like, and the transparent covering layer 22 of the cover finish layer 20 or the moisture permeable waterproof / humidity controlling layer 26 is the surface of the cover finish finishing building material. Exposed to.
A surface-finished building material having such a structure is used for interior finishing construction of an indoor wall surface of a building. After finishing the interior base material, the exterior finish building material may be attached, or the exterior finish building material can be used both as the exterior finish and the interior foundation.

In the construction state, the entire surface of the humidity control building material board 50 constructed on the indoor wall surface is covered with the cover finishing sheet S.
On the indoor wall surface, the humidity control layer 24 or the moisture permeable waterproof / humidity control layer 26 of the cover finish sheet S performs a humidity control function, and the humidity control building material board 50 on the back of the cover finish sheet S also absorbs and holds moisture. The humidity control ability is further improved. In particular, the humidity control characteristics of the exterior finishing sheet S that is exposed to the indoor space and allows moisture to quickly enter and exit are combined with the humidity control characteristics of the humidity control building material board 50 that is relatively thick and has a large moisture retention capacity. This makes it possible to exhibit a synergistic or complementary and good humidity control function that cannot be performed alone.

  Of course, since the transparent coating layer 22 exists on the surface facing the indoor space, the liquid adhering to the surface can be prevented from entering the inside of the humidity control building material board 50. Simply wiping off the liquid on the surface can restore the original beauty. The sound absorption characteristics of the humidity control building material board 50 are also improved.

The result of having manufactured a surface finishing sheet specifically and evaluating the performance is shown.
[Materials used]
<Base material sheet>
A non-woven sheet having air permeability was used.
<Humidity-control coating material>
Formulation: siliceous shale (average pore size 20 to 200 mm, specific surface area 20 to ²⁰⁰ m ² / g, average particle size 30 μm) 40% by weight, silica gel 10% by weight, calcium carbonate 30% by weight, vinylon fiber 4.5% by weight, 15% acrylic resin, 0.5% thickener, 50% water.

The above materials were mixed thoroughly by a conventional method to obtain a humidity control coating material.
<Transparent coating material>
Resin emulsion: A general-purpose resin emulsion product (resin Tg = 5 ° C.) composed of an aqueous emulsion in which acrylic resin particles are dispersed in water was used.
Fine inorganic particles: General-purpose colloidal silica (particle diameter 0.05 μm) product was used.
Mixing 69% by weight of resin emulsion, 30% by weight of fine inorganic particles, and 1% by weight of acrylic thickener, and adding water to a solid content concentration of 205 Prepared.

<Built-in waterproof and moisture-control coating material>
Siliceous shale (average pore diameter 20-200Å, specific surface area 20-200 m ² / g, average particle size 30 μm) 30% by weight, silica gel 10% by weight, calcium carbonate 20% by weight, vinylon fiber 4.5% by weight, The prepared transparent coating material was blended at a ratio of 35% by weight in terms of solid content concentration and 0.5% by weight of the thickener and sufficiently stirred and mixed to prepare a moisture-permeable waterproof / humidity-control coating material.
[Manufacture of cover finishing sheets]
Reference example 1:
A humidity control coating material was applied to the base sheet with a roll coater, and a humidity control layer was formed by performing a drying treatment at 60 ° C. for 30 minutes in a hot air drying path. A transparent coating material was spray-coated on the humidity control layer, followed by drying at 80 ° C. for 10 minutes in a hot air drying path to form a transparent coating layer.

Example 1 :
A moisture permeable waterproof / humidity control coating material was applied to the base sheet with a roll coater, and a drying treatment was performed at 60 ° C. for 30 minutes in a hot air drying path to form a moisture permeable waterproof / humidity control layer.
[Manufacture of exterior finishing building materials]
Reference Example 2, Example 2 :
On the surface of the universal Humidity gypsum board, a transparent coating material is applied with a brush, allowed to stand for 1 min at room temperature, at a stage where the coating surface expressed adhesiveness, Reference Example 1, the upper mounted finish sheet of Example 1, respectively Pressing and pressure bonding to obtain a surface finish building material in which the humidity control gypsum board and the surface finish sheet were integrated.

[Performance evaluation test]
<Water vapor transmission rate>
According to JIS-K7129, the amount of water vapor permeation in the transparent coating layer alone was measured.
<Hygroscopicity>
The back and side surfaces of each test specimen were sealed with aluminum foil. After holding for 48 hours in an environment of 25 ° C. and 50% RH, the amount of increase in weight when holding at 25 ° C. and 90% RH for 24 hours was measured to calculate the amount of moisture absorption (g / m ² · 24 h).
<Contamination resistance>
On the surface of each specimen, 1 cc of a dirty liquid containing a substance that may adhere to the indoor wall surface in the life such as coffee, Japanese tea, soy sauce, sauce, etc. was dropped with a dropper. After 1 minute, it was washed with water, and the removal state of the dirty liquid was visually observed. The evaluation criteria are as follows.

○: Completely removed.
(Triangle | delta): Although it removed considerably, the adhesion trace is recognized clearly.
X: It could not be removed at all.
<Surface hardness>
The pencil hardness was measured according to a conventional method. HB is harder than B.
The results of each test described above are shown in the following table. In the table, the water vapor transmission rate “>> 1000” means that it greatly exceeds 1000 g / m ² · 24 h.

〔評価〕
(1) 実施例１の表装仕上げシートは、良好な吸湿性を有すると同時に、耐汚染性に優れていることが裏付けられた。
これに対し、比較例１の表装仕上げシートは、透明被覆層を有しないため、耐汚染性が劣るものとなった。
(2) 実施例２の表装仕上げ建材は何れも、調湿性石膏ボードの吸湿性と表装仕上げシートの吸湿性とが相乗的に発揮され、非常に優れた吸湿性を発揮できる。勿論、表面の耐汚染性も良好である。

[Evaluation]
(1) It was proved that the surface-finished sheet of Example 1 had good hygroscopicity and at the same time excellent stain resistance.
On the other hand, since the surface finish sheet of Comparative Example 1 did not have a transparent coating layer, the stain resistance was inferior.
(2) In any case, the exterior finish building material of Example 2 synergistically exhibits the hygroscopicity of the moisture-adjusting gypsum board and the hygroscopicity of the exterior finish sheet, and can exhibit very excellent hygroscopicity. Of course, the contamination resistance of the surface is also good.

On the other hand, the surface-finished building material of Comparative Example 2 was inferior in hygroscopicity compared to Example 2 because a normal synthetic resin sheet having no moisture permeability was used as the base material sheet. In Comparative Example 2, it can be seen that substantially only the moisture-permeable waterproof / humidity control layer performs the moisture absorption function, and the humidity control function of the humidity control gypsum board does not work at all.

The exterior finish building material of the present invention can be applied to, for example, interior finishing construction of indoor walls of ordinary houses, and in addition to being able to exhibit a function of adjusting humidity to a comfortable humidity range for living in an indoor space, the surface is difficult to get dirty. The attached dirt is easy to remove, and good appearance quality can be maintained over a long period of time. In addition, the sound absorption characteristics of the interior finish can be improved.

Sectional drawing of the construction state of the cover finishing sheet showing embodiment used as the reference example of this invention Sectional drawing of the construction state of the cover finishing sheet showing embodiment which becomes an Example of this invention Cross-sectional view of the exterior finish building material using the exterior finish sheet

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Substrate sheet 20 Surface finish layer 22 Transparent coating layer 24 Humidity control layer 26 Moisture permeable waterproof / humidity control layer 40 Base material 50 Humidity control building material board S Surface finish sheet

Claims (1)

A humidity control building material board having a humidity control function, and a surface finish sheet affixed to the surface of the humidity control building material board,
The surface finishing sheet is a surface finishing sheet constituting the surface of the building,
A base sheet;
Arranged on the surface of the base sheet, at least one inorganic porous granular material selected from the group consisting of diatomaceous mudstone, diatom shale, allophane, silica gel, imogolite, sepiolite, zeolite and Oyaishi, synthetic resin, and particle size 0 and mounting the finishing layer made from the coating film of the aqueous coating material, a surface which has a humidity conditioning is breathable waterproof comprising a colloidal silica and / or Aruminazo Le of .001～1.0Myuemu,
The base sheet is made of a material having moisture permeability,
Surface-finished building material characterized by that.

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