JP2008138167A - Coating agent, humidity-controllable building material, wallpaper, and adhesive agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating agent that can form a continuous porous film having excellent humidity control, gas adsorption, and antifouling property. <P>SOLUTION: The coating agent is for forming a continuous porous film having humidity-controlling property and gas adsorption property, and comprises at least 15 to 65 mass% of inorganic porous material, a resin emulsion in an amount of 30 to 70 mass% in the coating agent, and a moisture-permeability imparting agent in an amount of 5 to 40 mass% to the solid part in the coating agent. The inorganic porous material has pores of an average pore diameter of 2 to 6 nm, the maximum coefficient of moisture adsorption more than 10%, a specific surface of more than 80 m<SP>2</SP>/g, and an average particle size of less than 50 μm, and the glass transition point of the resin constituting the emulsion is -50 to 30°C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a coating agent for forming a porous continuous film excellent in humidity control / gas adsorption property and antifouling property, a humidity control building material and wallpaper obtained by applying the coating agent, and an adhesive.

  In recent years, high airtightness of buildings such as houses has become a problem because it causes condensation on walls, windows or storage, and this condensation becomes a source of allergens such as molds and mites that cause allergic diseases. . Further, the high airtightness of buildings causes volatile organic compounds generated from chemical substances used in interior materials or furniture to stay in the room, and thus contributes to so-called chemical sensitivity.

  As these countermeasures, there is a method of blending an inorganic porous material having humidity conditioning and gas adsorbing properties with a coating agent for forming a finish layer of an interior material. For example, Patent Document 1 includes 5 to 95% by mass of an inorganic humidity conditioning material, 1 to 25% by mass of a resin binder with a solid content, and 0.1 to 15% by mass of a moisture permeability imparting agent with a solid content. Coating agents containing are proposed. However, since the amount of the resin blended is small, the coating agent can only be used as a coating wall, and the formed coating film (film) surface is rough and has no antifouling property.

JP 2006-2407 A

  On the other hand, as a method for improving the antifouling property, a method of increasing the amount of resin contained in the coating agent to form a continuous resin film is conceivable. In this case, the pores of the inorganic porous material to be blended are considered. The film is clogged, and the film has a problem that moisture conditioning and gas adsorbability are insufficient. Furthermore, in order to improve this problem, the humidity control and gas adsorption properties of the inorganic porous material can be further improved by reducing the average particle size of the inorganic porous material blended in the coating agent and increasing the specific surface area. A method to raise it is also conceivable. However, even in this case, there is no change in the pores of the inorganic porous material being blocked by the resin to be compounded, and the high hygroscopic property of the inorganic porous material has an effect, and the formed film is cracked. As a result, a continuous film cannot be formed.

  By the way, if the finishing layer of the interior material has not only the humidity control / gas adsorption performance described above but also moisture permeability (breathability), the base material constituting the interior material has humidity control / gas adsorption performance. By using the material, it can be expected to produce an interior material with higher humidity control and gas adsorption.

  Accordingly, an object of the present invention is to provide a coating agent capable of forming a porous continuous film having excellent humidity control / gas adsorption property and antifouling property. Moreover, the objective of this invention is providing the humidity control building material which has the outstanding humidity control, gas adsorption property, and antifouling property. Another object of the present invention is to provide a wallpaper having excellent humidity control / gas adsorption, moisture permeability and antifouling properties. Furthermore, the objective of this invention is providing the adhesive agent which can form the contact bonding layer which has humidity control, gas adsorption property, and moisture permeability.

In order to solve the above problems, the present inventors have intensively studied, and as a result, have found that the above-described problems can be solved by the following present invention. That is, the present invention is a coating agent for forming a porous continuous film having humidity control and gas adsorption properties, comprising at least 15 to 65% by mass of an inorganic porous material and the amount of resin in the coating agent Is formed by mixing a resin emulsion in an amount of 30 to 70% by mass and a moisture permeability imparting agent in an amount of 5 to 40% by mass in a coating agent, and the inorganic porous material is porous. Glass transition of a resin having an average pore radius of 2 to 6 nm, a maximum moisture absorption rate of 10% or more, a specific surface area of 80 m ² / g or more and an average particle diameter of 50 μm or less, and constituting the resin emulsion. The coating agent is characterized in that the temperature is in the range of −50 to 30 ° C. In the coating agent of the present invention, the elongation of the resin constituting the resin emulsion is preferably in the range of 100 to 2500%, and the average particle size of the resin particles in the resin emulsion is 0.00. It is preferable that it is the range of 05-2.0 micrometers.

In the coating agent of the present invention, the moisture permeability imparting agent is preferably at least one selected from the group consisting of water glass, a water-soluble resin, and a water-soluble paste, and constitutes the resin emulsion. The resin is preferably at least one selected from the group consisting of acrylic resins such as vinyl acetate resins, ethylene-vinyl acetate resins, protective colloid acrylic resins, urethane resins, and acrylic silicone resins. The coating agent of the present invention can further contain a microencapsulated foaming agent. In the coating agent of the present invention, the inorganic porous material is preferably at least one selected from the group consisting of siliceous shale, allophane, Otani stone, sepiolite, silica gel and activated clay. The moisture permeability of the quality continuous film is preferably 500 g / m ² · 24 hr or more.

  The present invention also relates to a humidity control building material in which a porous continuous film is formed by applying a coating agent on the surface of a substrate having humidity control, and the coating agent is the coating agent of the present invention. This is a humidity control building material. Further, the humidity control building material of the present invention may be formed by further laminating a resin layer having antifouling property on the porous continuous film, and the resin layer is porous. Formed of a film-forming composition, and the porous film-forming composition is composed mainly of a film-forming aqueous emulsion composed of synthetic resin particles having a particle size of 0.03 to 10 μm and water and colloidal silica, and The film-forming aqueous emulsion is an emulsion obtained by emulsion polymerization of an α, β-ethylenically unsaturated monomer and acrylic silane or vinyl silane, and the colloidal silica has a particle size of 1/3 or less of the synthetic resin particles. Furthermore, it is preferable that the amount of the colloidal silica is 0.5 to 30 times the mass that completely covers the synthetic resin particles.

The present invention also provides a wallpaper having a moisture absorption performance of 20 g / m ² or more, in which a porous continuous film having a thickness of 200 to 1500 μm is formed on a paper substrate, A wallpaper characterized in that a quality continuous film is formed by the coating agent of the present invention. In the wallpaper of the present invention, the paper base material has an average particle diameter of 50 μm or less, with an average pore radius of 2 to 6 nm, a maximum moisture absorption of 10% or more, a specific surface area of 80 m ² / g or more. It is preferable that an inorganic porous material is blended and exhibits a hygroscopic performance of 30 g / m ² or more, and the inorganic porous material is preferably siliceous shale. The wallpaper of the present invention preferably has a moisture permeability of 500 g / m ² · 24 hr or more.

The present invention also relates to an adhesive for forming a porous continuous film having humidity control and gas adsorption properties, comprising at least 15 to 65% by mass of an inorganic porous material and the amount of resin in the adhesive The resin emulsion in an amount of 30 to 70% by mass and the moisture permeability imparting agent in an amount of 5 to 40% by mass in the adhesive are blended, and the inorganic porous material is porous. Glass transition of a resin having an average pore radius of 2 to 6 nm, a maximum moisture absorption rate of 10% or more, a specific surface area of 80 m ² / g or more and an average particle diameter of 50 μm or less, and constituting the resin emulsion. The adhesive is characterized in that the temperature is in the range of −50 to 30 ° C. The adhesive of the present invention can further contain a hygroscopic resin in a proportion of 5 to 30% by mass in the adhesive.

  ADVANTAGE OF THE INVENTION According to this invention, the coating agent which can form the porous continuous film which has the outstanding humidity control, gas adsorption property, and antifouling property can be provided. Moreover, according to this invention, the humidity control building material which has the outstanding humidity control, gas adsorption property, and antifouling property can be provided. Further, according to the present invention, it is possible to provide a wallpaper having excellent humidity control / gas adsorption properties, moisture permeability and antifouling properties. Furthermore, according to this invention, the adhesive agent which can form the contact bonding layer which has humidity control, gas adsorption property, and moisture permeability can be provided.

<Coating agent>
Hereinafter, the present invention will be described in detail with reference to preferred embodiments for carrying out the present invention.
The coating agent of the present invention has at least 15 to 65% by mass of an inorganic porous material, a resin emulsion having an amount of resin in the coating agent of 30 to 70% by mass, and a solid content in the coating agent of 5 to 5%. The inorganic porous material has an average pore radius of 2 to 6 nm, a maximum moisture absorption rate of 10% or more, and a specific surface area of 80 m ² / m. The glass transition temperature of the resin constituting the resin emulsion is in the range of -50 ° C to 30 ° C. Hereinafter, each component will be described.

The inorganic porous material constituting the coating agent of the present invention has an average particle diameter of 50 μm or less, with an average pore radius of 2 to 6 nm, a maximum moisture absorption of 10% or more, a specific surface area of 80 m ² / g or more. Therefore, it has very good humidity conditioning and gas adsorption. For this reason, the film formed by the coating agent of the present invention containing the porous material can have excellent humidity control and gas adsorption properties. Further, since the particle size of the porous material is very small, the film formed by the coating agent is less likely to become soiled with the surface roughness suppressed. Further, according to the study of the present inventor, the inorganic porous material having the above characteristics generates condensed water in the voids of the porous material in an environment having a humidity of 60% or more, and then the humidity is less than 60%. In this environment, the condensed water is released into the atmosphere in a large amount as nano-water vapor. For this reason, since the film | membrane formed with the coating agent of this invention is effective also in health, the coating agent of this invention is useful as a material especially used in a living environment.

  In the present invention, the porous material preferably has a maximum moisture absorption of 15% or more, more preferably 20% or more for the purpose of generating more nano-water vapor. It is particularly preferred to use The "maximum moisture absorption rate" in the claims and specification of the present invention is the mass of the object to be measured after being placed in a constant temperature and humidity chamber at 100 ° C and 0% relative humidity for 24 hours, Then, the mass increase rate with the mass of the target object measured again after putting it in a constant temperature and humidity chamber of 25 ° C. and a relative humidity of 95% for 48 hours is shown. The “specific surface area” in the claims and specification of the present invention indicates a value measured by a BET method in which nitrogen is adsorbed at a liquid nitrogen temperature.

  Moreover, in this invention, content of the said porous material needs to exist in the range of 15-65 mass% in a coating agent. When the content is less than 15% by mass, the film formed by the coating agent has insufficient humidity control and gas adsorption properties. On the other hand, when the content exceeds 65% by mass, the film is cracked. Is likely to occur.

  Examples of the inorganic porous material that can take the above-described structure include siliceous shale, allophane, imogolite, sepiolite, activated clay, Oya stone, silica gel, and the like, and these can be used alone or in combination. be able to. Silica gel or activated clay that can be produced as an industrial product with little variation in quality is preferable. Furthermore, using silica gel with particularly excellent humidity control and activated clay with excellent gas adsorption has no variation in quality and has both excellent humidity adjustment and excellent gas adsorption. preferable. These inorganic porous materials described above can be used properly depending on the required color. For example, when white is required, silica gel or activated clay can be used, and when brown is required, siliceous shale, allophane, or the like can be used.

  In the present invention, among the above-mentioned inorganic porous materials, use of siliceous shale is one of particularly preferred embodiments. The siliceous shale is a porous metamorphic rock formed by altering general diatomaceous earth (diatomaceous mudstone), a fossil of phytoplankton, by the continuation of the earth. This siliceous shale has excellent humidity control, and a wide range of acid gases such as nitrogen oxide (NOx) and sulfur oxide (SOx), basic gases such as ammonia, and volatile organic compounds such as formalin. It has the property of adsorbing various types of gases. Siliceous shale is also known to generate a large amount of the above-mentioned nano-water vapor. Because of this characteristic, according to the study of the present inventor, the coating agent of the present invention uses a siliceous shale as an inorganic porous material, which can not be achieved with conventional materials. It is possible to produce interior materials that can exhibit various health promotion effects, such as a function of suppressing acidification in the body, a function of suppressing allergic diseases, a function of suppressing chemical sensitivity, and a function of suppressing the generation of static electricity. Also, since siliceous shale is generally ochery, a light-colored film is formed by preparing a coating agent in combination with a white inorganic porous material such as silica gel or activated clay. You can also. Also, it is possible to produce a coating agent corresponding to a wide range of humidity by using a siliceous shale having excellent humidity control in a high humidity region and silica gel having excellent hygroscopicity in a low humidity region.

  Next, the resin emulsion constituting the coating agent of the present invention will be described. The glass transition temperature of the resin in the resin emulsion used in the present invention needs to be in the range of −50 to 30 ° C. When the glass transition temperature of this resin is lower than −50 ° C., the surface tack of the film formed by the coating agent becomes too strong, which may cause a problem in antifouling properties. On the other hand, when it exceeds 30 ° C., it is difficult to prevent cracks generated in the film. Furthermore, the glass transition temperature of the resin is more preferably in the range of −40 to 10 ° C. By limiting the glass transition temperature of the resin within this range, the film to be formed has a smooth surface with more appropriate flexibility. In other words, even when the coating agent contains a large amount of particles of the inorganic porous material having a very high water absorption amount as described above, the formed film has a more suppressed occurrence of cracks. In addition, the antifouling property is further improved. It is also a preferred form to limit the glass transition temperature of the resin within the range of −15 to 10 ° C. Furthermore, it is most preferable to limit the glass transition temperature range of the resin to 0 ° C. or lower. That is, the coating agent of the present invention contains a large amount of water because it contains the inorganic porous material. For this reason, at the time of film formation, internal strain such as shrinkage strain becomes large, deformation followability is insufficient, and cracks are likely to occur. However, by limiting the glass transition temperature of the resin to 0 ° C. or lower, the occurrence of cracks can be more reliably prevented over a long period of time.

  Content of the said resin emulsion needs to exist in the range from which the amount of resin in a coating agent will be 30-70 mass%. When the amount of the resin is less than 30% by mass, the film formed by the coating agent is liable to crack and has poor antifouling properties. On the other hand, when it exceeds 70 mass%, the humidity control and gas adsorption performance of the film becomes insufficient. In the claims and specification of the present invention, the term “resin” simply indicates a resin contained in a resin emulsion. In addition, in the coating agent of the present invention, when simply referred to as “resin amount”, it indicates the amount of resin constituting the resin emulsion in the coating agent, and includes the amounts of “water-soluble resin” and “hygroscopic resin” described later. I can't.

  Further, the resin constituting the resin emulsion preferably has an elongation rate in the range of 100 to 2500%. Furthermore, it is particularly preferable that the elongation ratio is in the range of 500 to 1800%. By limiting the elongation ratio of the resin to this particularly preferable range, the crack resistance and antifouling property of the film formed by the coating agent become more excellent. The most preferable range of the stretching ratio is in the range of 600 to 1700%. The “extension ratio” in the claims and the specification of the present invention is a numerical value obtained by a measuring method based on JISK-6251.

  The average particle size of the resin particles in the resin emulsion is preferably in the range of 0.05 to 2.0 μm. By limiting the average particle diameter of the resin particles within this range, the coating agent of the present invention has an appropriate viscosity and is excellent in coating suitability. Moreover, since the adhesiveness between the resin particles is also improved, it is possible to more effectively prevent cracks from being formed in the formed film. The most preferable average particle diameter of the resin particles is in the range of 0.25 to 1.8 μm.

  There is no restriction | limiting in particular as a kind of said resin, For example, acrylic resins, such as vinyl acetate resin, ethylene-vinyl acetate resin (EVA resin), protective colloid acrylic resin, urethane resin, or acrylic silicone resin And at least one selected from these groups can be used.

  Next, the moisture permeability imparting agent constituting the coating agent of the present invention will be described. The moisture permeability imparting agent is for imparting moisture permeability (breathability) to the continuous film formed by the coating agent. Specifically, the film is made porous, and moisture permeability ( It is a material that imparts air permeability. That is, the coating agent of the present invention contains the moisture permeability imparting agent described above, whereby the formed film can be made into a porous continuous film. For this reason, even when a resin component is contained in a large amount in the coating agent, the pores of the inorganic porous material are suppressed from being blocked by the resin. That is, the coating effectively exhibits the humidity adjustment / gas adsorption effect of the porous material. In the case of a preferred embodiment of the present invention in which the base material to which the coating agent is applied has humidity control properties, the humidity control effect of the base material can be exhibited without deteriorating.

  The content of the moisture permeability imparting agent needs to be in the range of 5 to 40% by mass (solid content). When the said content is less than 5 mass%, the film | membrane formed with a coating agent becomes easy to produce a crack, and moisture permeability becomes inadequate. On the other hand, when the said content exceeds 40 mass%, the said membrane | film | coat becomes inadequate tolerance required as a finishing layer of interior material.

  Examples of the moisture permeability imparting agent include water glass mainly composed of alkali metal silicate such as lithium silicate, sodium silicate, potassium silicate or cesium silicate, water-soluble resin such as polyvinyl alcohol and polyvinylamine, starch paste and milk. Examples thereof include water-soluble pastes such as casein, silicone emulsions, calcium stearate or aluminum stearate. These can be used alone or in combination, and the type can be appropriately selected according to the use of the coating agent and the required properties. Preferably, water glass can be mentioned. Furthermore, water glass mainly composed of lithium silicate, which has good water resistance of the film formed by the coating agent, is particularly preferable. These moisture permeability imparting agents can be used in the form of solid, aqueous solution or water dispersion.

  In the coating agent of the present invention having such a structure, the mass ratio of the inorganic porous material in the coating agent, the resin amount of the resin emulsion, and the moisture permeability imparting agent (solid content) is particularly 1: 0. It is preferable to be within the range of 8 to 1.8: 0.25 to 0.75. By making these mass ratios within the above range, a more balanced film is formed that exhibits extremely excellent effects in all items such as humidity control, gas adsorption, antifouling properties, and crack resistance. It becomes possible. Moreover, the coating agent of this invention may mix | blend various additives in the range which does not impair the effect of this invention according to a required characteristic. For example, a viscosity modifier, a coloring agent, an antibacterial agent, etc. can be mix | blended. Moreover, fillers, such as aluminum hydroxide or calcium carbonate, can also be mix | blended. Furthermore, a white inorganic pigment such as titanium oxide may be blended in order to improve the concealability of the formed film. Moreover, you may mix | blend cut fiber with the coating agent of this invention within the range which does not impair the summary of this invention. Thereby, the film to be formed can have a followability to deformation, and the generation of cracks can be more effectively prevented. Examples of the cut fiber material used include resin fibers such as pulp fibers and vinylon fibers. The type and blending amount of the cut fiber can be appropriately selected according to the use or purpose.

  In addition, the coating agent of the present invention can contain a microencapsulated foaming agent in order to further improve the design of the formed film. The microencapsulated foaming agent can prevent the foaming gas from escaping out of the film even when the formed film is porous and air permeable, like the coating agent of the present invention. So it is effective. Any known foaming agent can be used, for example, a polymer such as vinylidene chloride, acrylic acid ester, methacrylic acid ester, acrylonitrile and / or methacrylonitrile, and microcapsules at the shell wall (shell). An average particle size of 5 to 50 μm can be used. In particular, the foaming agent preferably has an average particle diameter of 5 to 20 μm. In this case, the film formed by the coating agent has smooth irregularities and is more excellent in appearance. . The blending amount of the foaming agent is not particularly limited, but is preferably in the range of 1 to 30% by mass with respect to the solid content in the coating agent. More preferably, it is the range of 2-15 mass%. By making the said compounding quantity into the range of 2-15 mass%, the film | membrane which has the outstanding external appearance can be formed, maintaining resistance, such as abrasion resistance.

  The coating agent of the present invention having the above-described configuration can be used as a material for forming a film having the above-described characteristics by being applied on the surface of a substrate such as paper, particle board, gypsum board or calcium silicate board. . The method for applying the coating agent is not particularly limited, and for example, a method such as spray coating, roll coating or bar coating such as a high-pressure airless method can be used.

  There is no restriction | limiting in particular in the application quantity of the coating agent of this invention, It can apply | coat to a wide film thickness from a thin film to a thick film. Although the optimum coating amount varies depending on the use and purpose of using the coating agent of the present invention, for example, the thickness of the film formed by the coating agent is preferably about 100 to 1500 μm.

The coating agent of the present invention preferably has a maximum moisture absorption rate of 5% or more. In this case, the thickness of the film necessary to ensure a moisture absorption performance of 20 g / m ² or more can be suppressed to about 1000 μm. Further, the maximum moisture absorption is particularly preferably 10% or more. In this case, the thickness of the film necessary to ensure the moisture absorption performance of 20 g / m ² or more can be suppressed to about 300 μm, and even when forming a thin film for wallpaper use, etc. Can demonstrate.

The coating agent of the present invention is preferably designed so that the moisture permeability of the formed film is 500 g / m ² · 24 hr or more. When the moisture permeability is within the above range, not only the humidity control / gas adsorption performance of the film itself but also the humidity control / gas adsorption performance of the base material can be more effectively exhibited. In addition, the value of “moisture permeability” in the claims and the specification of the present invention is obtained by a measuring method based on the cup method of JIS A1324.

<Humidity control building materials>
Next, the humidity control building material of the present invention will be described. The humidity control building material of the present invention is a humidity control building material formed by applying a coating agent to a substrate surface having humidity control properties to form a porous continuous film. It is characterized by being a coating agent. For this reason, the humidity control building material of the present invention, as described above, is excellent because it uses the coating agent of the present invention that forms a porous continuous film having excellent humidity control and gas adsorption properties. It has humidity conditioning, gas adsorption and antifouling properties. Moreover, the coating amount and coating method of the coating agent in the humidity control building material of the present invention are the same as described above.

  The humidity control substrate is not particularly limited as long as it is a substrate having humidity control properties. For example, a gypsum board mixed with an inorganic porous material, an inorganic board such as a calcium silicate board, a particle board, an insulation board, etc. Wood board or paper.

  Moreover, it is preferable that the humidity control building material is formed by further laminating a resin layer having antifouling property on the porous continuous film. The resin composition for forming the resin layer may be any resin composition that can form a porous continuous film. For example, a resin composition obtained by removing the porous material from the coating agent or the porous material in the coating agent. What reduced the compounding quantity etc. can be used. Further, as this resin composition, a film-forming aqueous emulsion composed of synthetic resin particles having a particle size of 0.03 to 10 μm and water and colloidal silica disclosed in JP-A-3-106948 are mainly composed. A porous film-forming composition, wherein the film-forming aqueous emulsion is an emulsion obtained by emulsion polymerization of an α, β-ethylenically unsaturated monomer and acrylic silane or vinyl silane, and the colloidal silica is synthesized as described above. A porous film-forming composition having a particle size of 1/3 or less of the resin particles, and further having a composition in which the blending amount of the colloidal silica is 0.5 to 30 times the mass that completely covers the synthetic resin particles Things can also be used. In particular, when the humidity control building material of the present invention forms a resin layer having antifouling properties using this porous film-forming composition, it is extremely excellent in water resistance while maintaining the humidity control and gas adsorbability described above. Property, surface tack-free property and antifouling property can be obtained.

<Wallpaper>
Next, the case where the humidity control building material of the present invention described above is wallpaper will be described in detail below. The wallpaper of the present invention is obtained by forming a film with the coating agent of the present invention on the surface of a paper substrate. In particular, the wallpaper of the present invention has a moisture absorption performance of 20 g / m ² or more, in which a porous continuous film having a film thickness of 200 to 1500 μm is formed on a paper substrate by the coating agent of the present invention. It is preferable to show this. By setting it as such a structure, the wallpaper of this invention becomes a thing with more excellent humidity control and gas adsorption property, moisture permeability, and antifouling property. The values of “Hygroscopicity” and “Hygroscopic performance” in the claims and specification of the present invention are measured after the object is placed in a constant temperature and humidity chamber at 25 ° C. and 50% relative humidity and held for 48 hours. It is the value (moisture absorption amount) calculated | required by the mass difference with the mass of the target object measured after putting in the thermostat and humidity chamber of 25 degreeC and 90% of relative humidity, and hold | maintaining it for 24 hours after that. In addition, the value of “moisture release” in the claims and the specification of the present invention is determined after the measurement of hygroscopicity, and after being placed in a constant temperature and humidity chamber at 25 ° C. and 50% relative humidity for 24 hours. It is a value (moisture release amount) obtained by measuring the mass of the measured object and calculating the mass difference between this mass and the end of hygroscopic measurement.

Examples of the paper base material used for the wallpaper of the present invention include synthetic paper, Japanese paper, emulsion paper, incombustible paper, flame retardant paper, biodegradable paper, or composite paper composed of a plurality of types selected from these. Can be used. Also, the basis weight of the paper substrate is not particularly limited, it is preferably in the range of 50 to 300 g / m ^2. By setting the basis weight of the paper substrate within the above range, the obtained wallpaper has both necessary and sufficient physical properties and excellent moisture permeability. In addition, instead of such a paper substrate, wallpaper is made using a resin substrate made of acrylic resin, polypropylene resin, polyethylene resin, polystyrene resin, polyurethane resin, silicone resin, polyester resin, polytetrafluoroethylene (PTFE), or the like. Can also be produced. However, although the wallpaper obtained in this case has good humidity control and gas adsorption properties, the moisture permeability is significantly lower than that of a paper base material.

  In the wallpaper of the present invention, the thickness of the paper substrate is not particularly limited, but is preferably in the range of 5 to 1000 μm. By setting the thickness of the paper substrate within the above range, the obtained wallpaper has good handleability at the time of production or processing, and has excellent characteristics as wallpaper. Furthermore, it is preferable that the thickness of the paper substrate is within the above range from the viewpoint of moisture permeability of the wallpaper.

Although there is no restriction | limiting in particular in the manufacturing method of such a paper base material, For example, it can produce by methods, such as a papermaking method. Moreover, in the wallpaper of this invention, when manufacturing a paper base material, it is preferable to mix | blend the said inorganic porous material in a paper base material, for example in the step of making paper. Further, the wallpaper of the present invention is made of an inorganic porous material having an average particle diameter of 50 μm or less, having an average pore radius of 2 to 6 nm, a maximum moisture absorption of 10% or more, a specific surface area of 80 m ² / g or more. It is preferable to mix | blend in a base material, Furthermore, it is preferable that the moisture absorption performance of 30 g / m < ² > or more is shown. In this case, since the humidity control and gas adsorption properties of the paper base material itself are also improved, it is possible to obtain a wallpaper that is further excellent in humidity control and gas adsorption properties. The amount of the inorganic porous material to be blended in the paper substrate is not particularly limited, but is preferably in the range of 5 to 30% by mass with respect to the total mass of the paper substrate.

  As the inorganic porous material to be blended in the paper substrate, the same inorganic porous material contained in the coating agent can be used. Preferably, it is a siliceous shale, and in this case, it is possible to effectively obtain the effects of the siliceous shale as described above. In other words, since the wallpaper is used in a place close to human beings and in a large area, the siliceous shale possesses by using the siliceous shale in the surface film of the wallpaper or in the paper substrate. The above-described effects can be obtained efficiently.

  First, the wallpaper of this invention can be produced by forming the coating layer by the coating agent of this invention mentioned above on one side of such a paper base material. There is no restriction | limiting in particular as a formation method of this coating layer, A conventionally well-known method can be used. For example, various methods such as a coating method using a knife coater, a pipe coater, a comma coater or a gravure coater, spraying using a spray or the like, or an extrusion method using a T die or the like can be used. The drying method after applying the coating agent is not particularly limited, and examples thereof include a method using a heat source such as hot air or an infrared heater.

  Moreover, in the wallpaper of this invention, it is preferable that the thickness of the coating layer to form is in the range of 200-1500 micrometers. When it is less than 200 μm, the effect of humidity adjustment and gas adsorption on the wallpaper is limited. On the other hand, if the thickness exceeds 1500 μm, the resulting wallpaper will be hard, so the handleability may deteriorate when winding and storing the wallpaper or during construction. When this occurs, cracks may occur in the coating layer.

  As the wallpaper of the present invention, among the coating agents of the present invention to be used, those containing a microencapsulated foaming agent are preferably used. Thereby, the wallpaper of this invention has the outstanding design property. For example, the foaming agent is applied to a paper substrate and dried, and then heated and foamed using a foaming heating furnace or the like. Furthermore, the wallpaper which has a three-dimensional design property can be obtained using a cooling embossing roll. Moreover, you may give a three-dimensional uneven | corrugated feeling using a chemical embossing method.

Moreover, the wallpaper of this invention can also provide the design property by a pattern by providing a pattern printing layer in the surface of a paper base material or a coating layer in the range which does not impair the objective of this invention. As a printing method of the pattern printing layer, for example, a gravure printing method, a rotary screen printing method, a flexographic printing method, an ink jet printing method, or a transfer printing method can be used. The wallpaper of the present invention having such a structure preferably has a moisture permeability of 500 g / m ² · 24 hr or more. By setting the moisture permeability of the wallpaper to 500 g / m ² · 24 hr or more, it becomes possible to more effectively exhibit effects such as humidity control of the base material to which the wallpaper is attached.

<Adhesive>
The adhesive of the present invention is an adhesive for forming a porous continuous film having humidity conditioning and gas adsorption properties, and includes at least 15 to 65% by mass of an inorganic porous material and a resin in the adhesive A resin emulsion whose amount is 30 to 70% by mass and a moisture permeability imparting agent whose solid content in the adhesive is 5 to 40% by mass are blended, and the inorganic porous material has porous average pores. It has an average particle diameter of 50 μm or less, a radius of 2 to 6 nm, a maximum moisture absorption of 10% or more, a specific surface area of 80 m ² / g or more, and the glass transition temperature of the resin constituting the resin emulsion is − It is the range of 50 to 30 degreeC. For this reason, the adhesive layer formed by the adhesive of the present invention has not only humidity adjustment and gas adsorption properties but also excellent moisture permeability (breathability).

  As the inorganic porous material, the resin emulsion, and the moisture permeability imparting agent constituting the adhesive of the present invention, the same materials as those constituting the coating agent of the present invention described above can be used. Moreover, the adhesive agent of this invention can also mix | blend another additive as needed. In the adhesive of the present invention, the “resin amount” indicates the amount of the resin constituting the resin emulsion in the adhesive, and does not include the amount of “water-soluble resin” or “hygroscopic resin” described later. .

  The method for applying the adhesive is not particularly limited, and any conventionally known method can be used. Moreover, the application amount of the adhesive is not particularly limited, but can be appropriately selected depending on the intended use. For example, the formed film thickness can be within a range of 20 to 2000 μm. Moreover, when using the adhesive agent of this invention as an adhesive agent for lamination used for the lamination of wallpaper, it is preferable to make it a thin film with a film thickness of 20-200 micrometers. However, in this case, it is preferable to use silica gel having high hygroscopicity as the inorganic porous material because the humidity adjustment / gas adsorption property of the adhesive layer itself may be lowered due to the thin film thickness. In addition to the inorganic porous material, a hygroscopic resin such as a nonionic polyalkylene oxide resin having a high hygroscopic property can also be used. The content of the hygroscopic resin is preferably blended in the adhesive within a range of 5 to 30% by mass. The particle size of the hygroscopic resin is preferably 100 μm or less, and more preferably 50 μm or less in order to reduce the appearance of irregularities due to the hygroscopic resin on the surface of the wallpaper to be laminated. Moreover, when using the adhesive agent of this invention as an adhesive agent for tiles used for adhesion | attachment of a tile or a humidity control tile, it is preferable to make it a film thickness of 500-2000 micrometers. In this case, it is preferable to use water glass or starch paste as the moisture permeability imparting agent because it is necessary to reduce the amount of moisture stored in the adhesive layer.

  Hereinafter, although it demonstrates more concretely using an Example and a comparative example, this invention is not limited by the following Example, unless the summary is exceeded.

<Coating agent>
[Preparation of coating agent]
(Example 1)
A 50% by mass (solid content) of an EVA resin emulsion having a glass transition temperature of 0 ° C. is mixed with 15% by mass (solid content) of water glass composed of lithium silicate, 5% by mass of activated clay, and 30% by mass of silica gel, and stirred. By doing this, the coating agent which is Example 1 of this invention was produced. The activated clay used at this time has a porous average pore radius of 3.2 nm, a maximum moisture absorption rate of 25%, a specific surface area of 290 m ² / g, and an average particle size of 15 μm. Has an average pore radius of 3 nm, a maximum moisture absorption rate of 72%, a specific surface area of 450 m ² / g, and an average particle size of 20 μm. The elongation percentage of the EVA resin was 800%, and the average particle size was 0.9 μm.

(Example 2)
A coating agent of Example 2 was produced in exactly the same manner as in Example 1 except that the activated clay and silica gel in Example 1 were changed to siliceous shale (35% by mass). The siliceous shale used at this time has a porous average pore radius of 3.8 nm, a maximum moisture absorption rate of 22%, a specific surface area of 121 m ² / g, and an average particle size of 10 μm.

(Example 3)
A coating agent of Example 3 was produced in the same manner as in Example 1 except that the water glass in Example 1 was changed to polyvinyl alcohol.

Example 4
The coating agent of Example 4 was produced in exactly the same manner as in Example 1 except that the water glass in Example 1 was changed to starch paste.

[Evaluation]
(Preparation of test specimen)
Each of the obtained coating agents of Examples 1 to 4 was applied on a glass plate and dried to form a 200 mm square and 1 mm thick film, thereby preparing test specimens of Examples 1 to 4. .

(Test method)
The test body was evaluated by the following test method. In the evaluation criteria, “◎” indicates “excellent”, “○” indicates “good”, “△” indicates “possible”, “×” indicates “impossible”, “◎”, “○”, and “△”. Is a practical level.

-Crack resistance test: The film formed on the test specimen was visually checked for cracks. The evaluation criteria are as follows.
○: No cracks are observed in the film.
Δ: Microcracks are generated in the film.
X: Mud crack occurred in the film.

Moisture absorption rate test: The mass of the test specimen measured after being placed in a constant temperature and humidity chamber at 25 ° C. and a relative humidity of 50% for 48 hours, and then the constant temperature and humidity chamber at 25 ° C. and a relative humidity of 90% The mass increase rate (moisture absorption rate) was calculated based on the mass of the test specimen measured after being put in the sample and held for 24 hours. The evaluation criteria are as follows.
(Double-circle): The mass increase rate of a test body is 4.00% or more.
○: Mass increase rate of the specimen is 3.00% or more and less than 4.00%.
(Triangle | delta): The mass increase rate of a test body is 2.00% or more and less than 3.00%.
X: The mass increase rate of a test body is less than 2.00%.

-Hygroscopicity test: The mass increase amount (hygroscopic amount) was calculated from the mass of the specimen measured in the moisture absorption rate test.

Maximum moisture absorption rate test: The specimen is put in a constant temperature and humidity chamber of 100 ° C. and 0% relative humidity and kept for 24 hours, and then measured, and then the constant temperature and constant temperature of 25 ° C. and relative humidity of 95%. The mass increase rate (maximum moisture absorption rate) was calculated from the mass of the test specimen measured after being placed in a wet tank and held for 48 hours. The evaluation criteria are as follows.
A: Mass increase rate of the specimen is 7.00% or more.
○: Mass increase rate of the specimen is 5.00% or more and less than 7.00%.
(Triangle | delta): The mass increase rate of a test body is 3.00% or more and less than 5.00%.
X: The mass increase rate of a test body is less than 3.00%.

Moisture release rate test: after the specimen was cured for 48 hours in a constant temperature and humidity chamber at 25 ° C. and 50% relative humidity and then held in a constant temperature and humidity tank at 25 ° C. and 90% relative humidity for 24 hours. The mass was measured, and then placed in a constant temperature and humidity chamber at 25 ° C. and 50% relative humidity and held for 24 hours, and then the mass of the test specimen was measured again. The mass reduction rate (moisture release rate) of the test specimen was calculated. The evaluation criteria are as follows.
A: Mass reduction rate of the specimen is 4.00% or more.
○: The mass reduction rate of the specimen is 3.00% or more and less than 4.00%.
(Triangle | delta): The mass decreasing rate of a test body is 2.00% or more and less than 3.00%.
X: The mass decreasing rate of a test body is less than 2.00%.

Gas adsorption test: The specimen was placed in a desiccator (volume: 12.3 L) in which the concentration of formaldehyde was adjusted to 80 ppm, and the concentration of formaldehyde in the desiccator after 24 hours was measured. The evaluation criteria are as follows.
○: The concentration of formaldehyde in the desiccator is less than 5 ppm.
(Triangle | delta): The density | concentration of formaldehyde in a desiccator is 5 ppm or more and less than 10 ppm.
X: The concentration of formaldehyde in the desiccator is 10 ppm or more.

-Antifouling test: Dirt was adhered to the test specimen with an aqueous magic (black), and a wiping test was conducted with water after 24 hours. The evaluation criteria are as follows.
◯: Almost no dirt remains after wiping.
Δ: Slight dirt remains after wiping.
X: Much of the dirt remains even after wiping.

  From the above evaluation results, it was confirmed that the coating agents of Examples 1 to 4 were excellent in gas adsorption and antifouling properties and could form a continuous film without cracks. Moreover, since these coating agents were excellent in the maximum moisture absorption rate test and the moisture absorption rate test, it was confirmed that a film having good moisture absorption performance can be formed. Furthermore, it was confirmed that these coating agents have excellent moisture conditioning performance because they have good moisture-releasing properties in addition to moisture absorption performance.

[Other Examples and Comparative Examples]
As shown in Table 2, the coating agents of Examples and Comparative Examples were prepared in the same manner as in Example 1 except that the amount of the resin emulsion, water glass, activated clay and / or silica gel in Example 1 was changed. Then, a crack resistance test, a moisture absorption rate test, and a maximum moisture absorption rate test were performed by the same test method as described above. However, when the evaluation of the crack resistance test was “x”, other tests were not performed. In addition, the above test was comprehensively evaluated according to the following evaluation criteria. The obtained evaluation results are shown in Table 2. In addition, the compounding quantity of the activated clay and silica gel in the Example and comparative example which are shown in Table 2 is shown in Table 3, respectively.
○: The evaluation results of the crack resistance test, the moisture absorption rate test, and the maximum moisture absorption rate test were all “」 ”or“ ○ ”.
Δ: Any of the evaluation results of the crack resistance test, the moisture absorption rate test, or the maximum moisture absorption rate test was “Δ”.
X: Any of the evaluation results of the crack resistance test, the moisture absorption rate test, or the maximum moisture absorption rate test was “x”.
Moreover, when the antifouling property test was done by the method similar to the above about the coating agent of the Example shown in Table 2, all the test bodies were the states in which the dirt after wiping off remained.

  The EVA resin emulsion in Example 1 was changed to an acrylic resin emulsion having a glass transition temperature of −50 ° C., −40 ° C., −30 ° C., −15 ° C., −10 ° C., −5 ° C., or 10 ° C., respectively. Furthermore, the coating agent of an Example and a comparative example was produced by the compounding quantity of the resin emulsion shown in Tables 4-10, water glass, activated clay, and a silica gel. Further, the obtained coating agent was subjected to a crack resistance test, a moisture absorption rate test, and a maximum moisture absorption rate test in the same manner as described above, and comprehensive evaluation was performed in the same manner as described above. The evaluation results are shown in Tables 4-10. In addition, the compounding quantity of the activated clay and the silica gel in the Examples and Comparative Examples in Tables 4 to 10 is as shown in Table 3. Moreover, about the coating agent of the Example shown to Tables 4-10, when the antifouling property test was done by the method similar to the above, it is a part about the test body produced with the coating agent of the Example shown in Table 4. In the test specimens prepared with the coating agents of Examples shown in Tables 5 to 10, all of the specimens after wiping were in a state in which little dirt remained.

[Example 5]
The coating agent of Example 5 was produced in exactly the same manner as in Example 1 except that the EVA resin emulsion in Example 1 was changed to an EVA resin emulsion having a glass transition temperature of 30 ° C. The coating agent of Example 5 obtained was subjected to crack resistance test, moisture absorption rate test, moisture absorption rate test, gas adsorption test and antifouling property test in the same manner as in Example 1. In the property test, microcracks occurred, but all the results were at a level of no practical problem.

<Production of humidity control building materials>
The side and back of a 200 mm square humidity control gypsum board (trade name: Sawayaka gypsum board, manufactured by Chiyodaute Co., Ltd.) were sealed with aluminum foil. Next, on the surface of the gypsum board, the coating agent of Example 1 is applied and dried so that the average film thickness of the dried film becomes 1 mm, and a humidity-control building material according to an example of the present invention is produced. did. When the obtained moisture control building material was subjected to a hygroscopicity test in the same manner as described above, the moisture absorption amount was 250 g / m ² , and it was confirmed that the humidity control building material had excellent moisture absorption performance. Further, moisture absorption of the humidity building material (250g / m ^2), as compared to moisture absorption of forming film of coating agent of Example ^{1 (36.9g / m 2),} 213.1g / m 2 increased Therefore, this value is considered to be the amount of moisture absorbed by the gypsum board through the film. Therefore, it was confirmed that the film has excellent moisture permeability.

<Production of wallpaper>
[Adjustment of coating agent for wallpaper]
Each of the coating agents of Examples 1 to 3 is blended with 5% by mass of a microencapsulated foaming agent (trade name: Microsphere 85SD, manufactured by Matsumoto Yushi Co., Ltd.) based on the solid content in the coating agent. Thus, coating agents with foaming agents of Examples 6 to 8 were produced.

[Create wallpaper]
Next, 20% by mass of siliceous shale having an average pore radius of 3.8 nm, a maximum moisture absorption rate of 22%, a specific surface area of 121 m ² / g, and an average particle size of 10 μm is blended as a paper substrate. A pulp paper having a basis weight of 200 g / m ² was prepared. On the surface of this paper substrate, the coating agent of Example 6 was applied by a comma coating method and dried at about 90 ° C. to form a coating layer having an average film thickness of 1000 μm after drying. Next, the coating layer was foamed in a foaming heating furnace having an in-furnace temperature of about 150 ° C., and then an embossed pattern was formed on the surface of the foamed coating layer using a cooling embossing roll to produce the wallpaper of Example 9. did. As for the coating agents with foaming agents of Examples 7 and 8, wallpaper was prepared in the same manner as when the wallpaper was prepared using the coating agent of Example 6, and the wallpapers were made as Examples 10 and 11, respectively.

[Wallpaper evaluation]
Example 9
When the wallpaper of Example 9 was subjected to a hygroscopicity test in the same manner as described above, the moisture absorption amount was 61.9 g / m ² , and it was confirmed that the wallpaper had excellent moisture absorption performance. Moreover, when the wallpaper of Example 9 was subjected to a crack resistance test, a gas adsorption test and an antifouling test in the same manner as described above, an evaluation result that could be used practically was obtained. Furthermore, when the wallpaper of Example 9 was subjected to a moisture permeability test by a method based on the cup method of JIS A1324, a result of 750 g / m ² · 24 hr was obtained. Thereby, it was confirmed that the wallpaper of Example 9 has excellent moisture permeability.

(Examples 10 and 11)
About the wallpaper of Examples 10 and 11, when the hygroscopicity test and the moisture permeability test were performed in the same manner as described above, the evaluation results shown in Table 11 were obtained, and both had excellent moisture absorption and moisture permeability. Was confirmed.

<Preparation of adhesive>
By adjusting the viscosity and the like of the coating agent of Example 1, an adhesive which is Example 12 of the present invention was produced. After the side and back surfaces of a gypsum board having a moisture control property (trade name: Sawayaka gypsum board, manufactured by Chiyodaute Co., Ltd.) are sealed with aluminum foil, the average film thickness of the adhesive obtained on the surface of the gypsum board is 1000 μm. Then, a moisture-conditioning tile (Eco Carat, manufactured by INAX Co., Ltd.) having a hygroscopic property of 160 g / m ² was adhered thereon to produce a decorative board. When the obtained decorative board was subjected to a hygroscopicity test in the same manner as described above, the moisture absorption amount was 410 g / m ² . In addition to the moisture absorption amount of the moisture control tile and the moisture absorption amount of the decorative board, the moisture absorption amount of the film formed by the coating agent having the same composition as the adhesive agent is 36.9 g / m ^2. It was confirmed that the adhesive layer formed by the above has excellent hygroscopicity and moisture permeability.

  Moreover, the adhesive agent for wallpaper which can be used for adhesion | attachment of a wallpaper and a gypsum board was produced by adjusting the viscosity etc. of the coating agent of Examples 1-4. The obtained adhesive for wallpaper was made into Examples 13-16, respectively. Next, when the commercially available gypsum board and the wallpaper were bonded using the adhesives of Examples 13 to 16, the adhesive strength was confirmed to have a practically no problem level. Next, test bodies were prepared from the adhesives of Examples 13 to 16 in exactly the same manner as the coating agents of Examples 1 to 4, and a moisture absorption rate test, a moisture absorption test, a moisture release rate test, and a gas adsorption property were obtained. When the test was conducted, almost the same evaluation results as those of the coating agents of Examples 1 to 4 were obtained. The evaluation results are shown in Table 12. Furthermore, about the film | membrane formed with the adhesive agent of Examples 13-16, the moisture permeability test was done by the method based on the cup method of JISA1324, respectively. The evaluation results are shown in Table 12.

  From the above evaluation results, it was confirmed that the adhesive of the present invention can also be used as an adhesive for wallpaper and has excellent humidity conditioning / gas adsorption properties and moisture permeability.

  ADVANTAGE OF THE INVENTION According to this invention, the coating agent which can form the porous continuous film which has the outstanding humidity control, gas adsorption property, and antifouling property can be provided. Moreover, according to this invention, the humidity control building material which has the outstanding humidity control, gas adsorption property, and antifouling property can be provided. Further, according to the present invention, it is possible to provide a wallpaper having excellent humidity control / gas adsorption property, antifouling property and moisture permeability. Therefore, the coating agent of the present invention can be suitably used as a material for forming a finishing layer of any kind of interior material, and the humidity control building material and wallpaper formed by applying the coating agent can be suitably used as an interior material. Furthermore, according to this invention, the adhesive agent which can form the contact bonding layer which has humidity control, gas adsorption property, and moisture permeability can be provided.

Claims (17)

A coating agent for forming a porous continuous film having humidity conditioning and gas adsorbing properties, comprising at least 15 to 65% by mass of an inorganic porous material and a resin amount in the coating agent of 30 to 70% by mass And the moisture permeability imparting agent in such an amount that the solid content in the coating agent is 5 to 40% by mass, and the inorganic porous material has a porous average pore radius of 2 ˜6 nm, the maximum moisture absorption is 10% or more, the specific surface area is 80 m ² / g or more, the average particle diameter is 50 μm or less, and the glass transition temperature of the resin constituting the resin emulsion is −50 to 30 A coating agent characterized by being in the range of ° C.   The coating agent according to claim 1, wherein an elongation percentage of the resin constituting the resin emulsion is in a range of 100 to 2500%.   The coating agent according to claim 1 or 2, wherein an average particle diameter of the resin particles in the resin emulsion is in a range of 0.05 to 2.0 µm.   The coating agent according to any one of claims 1 to 3, wherein the moisture permeability imparting agent is at least one selected from the group consisting of water glass, a water-soluble resin, and a water-soluble paste.   The resin constituting the resin emulsion is at least one selected from the group consisting of vinyl acetate resins, ethylene-vinyl acetate resins, acrylic resins such as protective colloid acrylic resins, urethane resins, and acrylic silicone resins. The coating agent according to any one of claims 1 to 4.   Furthermore, the coating agent of any one of Claims 1-5 formed by mix | blending the microencapsulated foaming agent.   The coating agent according to any one of claims 1 to 6, wherein the inorganic porous material is at least one selected from the group consisting of siliceous shale, allophane, Otani stone, sepiolite, silica gel, and activated clay. The coating agent according to any one of claims 1 to 7, wherein the porous continuous film has a moisture permeability of 500 g / m ² · 24 hr or more.   A humidity control building material formed by applying a coating agent to a surface of a substrate having humidity control to form a porous continuous film, wherein the coating agent is the coating according to any one of claims 1 to 8. A humidity control building material characterized by being an agent.   The humidity control building material according to claim 9, wherein a resin layer having antifouling properties is further laminated on the porous continuous film.   The resin layer is formed of a porous film-forming composition, and the porous film-forming composition comprises a film-forming aqueous emulsion composed of synthetic resin particles having a particle size of 0.03 to 10 μm and water, and colloidal silica. And the film-forming aqueous emulsion is an emulsion obtained by emulsion polymerization of an α, β-ethylenically unsaturated monomer and acrylsilane or vinylsilane, and the colloidal silica is one of the synthetic resin particles. The humidity control building material according to claim 10, further comprising: a particle size of / 3 or less, and further comprising a colloidal silica blending amount of 0.5 to 30 times the mass completely covering the synthetic resin particles. . A wallpaper having a moisture absorption performance of 20 g / m ² or more formed by forming a porous continuous film having a film thickness of 200 to 1500 μm on a paper substrate, wherein the porous continuous film is claimed. Item 11. A wallpaper formed by the coating agent according to any one of items 1 to 8. The paper base material contains an inorganic porous material having an average particle diameter of 50 μm or less, having an average pore radius of 2 to 6 nm, a maximum moisture absorption of 10% or more, and a specific surface area of 80 m ² / g or more. The wallpaper according to claim 12, wherein the wallpaper has a moisture absorption performance of 30 g / m ² or more.   The wallpaper according to claim 13, wherein the inorganic porous material is siliceous shale. The wallpaper according to any one of claims 12 to 14, which has a moisture permeability of 500 g / m ² · 24 hr or more. An adhesive for forming a porous continuous film having humidity conditioning and gas adsorption properties, at least 15 to 65% by mass of an inorganic porous material, and a resin amount in the adhesive of 30 to 70% by mass The above-mentioned inorganic porous material has a porous average pore radius of 2 and a moisture permeability imparting agent in an amount such that the solid content in the adhesive is 5 to 40% by mass. ˜6 nm, the maximum moisture absorption is 10% or more, the specific surface area is 80 m ² / g or more, the average particle diameter is 50 μm or less, and the glass transition temperature of the resin constituting the resin emulsion is −50 to 30 An adhesive having a temperature range of ° C.   Furthermore, the adhesive agent of Claim 16 which contains a hygroscopic resin in the ratio of 5-30 mass% in an adhesive agent.