Odor sealants for walls and wall materials

Abstract

To provide an odor sealing material for a wall and a wall material which can suppress attachment of odor to wallpaper and a building without lowering designability of the wallpaper.SOLUTION: A wall material 200 includes: an odor sealing material 100 for a wall arranged on a rear face of wallpaper; and a surface base material 210 laminated on a surface opposite to the wallpaper of the odor sealing material 100 for the wall. The odor sealing material 100 for the wall includes: a paper base material layer 11 which is arranged so as to face the rear face of the wallpaper and is formed of a paper material; an anchor coat layer 12 which is laminated on the paper base material layer 11 and contains polyolefin; a protective layer 15 which is laminated on the anchor coat layer 12 and contains a polyvinyl alcohol-based resin; and a vapor-deposited layer 13 which is laminated on the protective layer 15 and is formed by vapor-depositing a metal or an inorganic compound. Therein, the polyolefin contained in the anchor coat layer 12 has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic acid anhydride group and a carboxylic acid ester.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wall odor sealant for use in wallpaper used in the interior decoration of buildings, for example, and to a wall material provided with the wall odor sealant. [Background technology]

[0002] Due to the deterioration of buildings and the living conditions of residents, strong odors and unpleasant smells can occur indoors, reducing the livability and comfort of homes. Strong odors and unpleasant smells can be caused by, for example, various chemicals contained in building materials used inside the floors and walls of buildings, or by indoor odors that have permeated the building materials and spread throughout the room. To prevent odors from permeating wallpaper, for example, there is a film disclosed in Patent Document 1. The film disclosed in Patent Document 1 is a film to be attached to wallpaper, and is formed by laminating a layer containing a particulate adsorbent that supports a compound having an amino group and a layer containing a particulate adsorbent that does not support a compound having an amino group. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-210718 Summary of the Invention [Problem to be solved by the invention]

[0004] When the film disclosed in Patent Document 1 is applied to the surface of a wall material to remove odors that have adhered to ordinary wallpaper or the wall surface of a building that serves as the wallpaper base, there is a problem in that the texture and design of the wallpaper is reduced. In view of the above-mentioned problems, the present invention aims to provide an odor-sealing material for walls and a wall material that can suppress the adhesion of odors to wallpaper and buildings without reducing the design quality of the wallpaper. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, one aspect of the present invention is a wall odor sealant to be placed on the back surface of wallpaper, comprising a paper substrate layer, an anchor coat layer, a protective layer, and a vapor deposition layer. The paper substrate layer is placed opposite the back surface of the wallpaper and is formed using a paper material. The anchor coat layer is laminated on the surface of the paper substrate layer opposite the surface facing the wallpaper and contains a polyolefin. The protective layer is laminated on the surface of the anchor coat layer opposite the surface facing the paper substrate layer and contains a polyvinyl alcohol-based resin. The vapor deposition layer is laminated on the surface of the protective layer opposite the surface facing the anchor coat layer and is formed by vapor deposition of a metal or inorganic compound. The polyolefin contained in the anchor coat layer has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic acid ester.

[0006] In order to solve the above-mentioned problems, one aspect of the present invention is a wall odor sealant to be placed on the back surface of wallpaper, comprising a base paper layer, an anchor coat layer, a protective layer, and a vapor deposition layer. The base paper layer is placed opposite the back surface of the wallpaper and comprises a paper material. The anchor coat layer is laminated on the surface of the base paper layer opposite the surface facing the wallpaper and comprises a polyolefin. The protective layer is laminated on the surface of the anchor coat layer opposite the surface facing the base paper layer and comprises a polyvinyl alcohol-based resin. The vapor deposition layer is laminated on the surface of the protective layer opposite the surface facing the anchor coat layer and is formed by vapor deposition of a metal or inorganic compound. The base paper layer comprises a paper substrate and at least one of a first laminated resin layer laminated on the surface of the paper substrate facing the anchor coat layer and a second laminated resin layer laminated on the surface of the paper substrate opposite the surface facing the anchor coat layer. Furthermore, the polyolefin contained in the anchor coat layer has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic acid ester.

[0007] In order to solve the above-mentioned problems, one aspect of the present invention is a wall material comprising a wall odor sealant and a surface substrate laminated on the surface of the wall odor sealant facing the wallpaper. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to provide an odor-sealing material for walls and a wall material that can suppress the adhesion of odors to wallpaper and buildings without reducing the design quality of the wallpaper. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing an example of the configuration of an odor sealant for walls and a wall material according to a first embodiment of the present invention. [Figure 2] FIG. 4 is a cross-sectional view showing an example of the configuration of an odor sealant for walls and a wall material according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present technology will be described with reference to the drawings. In the drawings, identical or similar parts are designated by identical or similar reference numerals, and redundant description will be omitted. Each drawing is a schematic diagram and may differ from the actual product. The embodiments described below exemplify devices and methods for embodying the technical idea of ​​the present technology, and the technical idea of ​​the present technology is not limited to the devices and methods exemplified in the following embodiments. The technical idea of ​​the present technology can be modified in various ways within the technical scope described in the claims. Furthermore, the directions of "left and right" and "up and down" in the following description are merely defined for the convenience of explanation and do not limit the technical idea of ​​the present invention. Therefore, for example, if the page is rotated 90 degrees, "left and right" and "up and down" are read interchangeably, and of course, if the page is rotated 180 degrees, "left" becomes "right" and "right" becomes "left."

[0011] (First embodiment) The configuration of the wall material 200 will be described below with reference to FIG. As shown in FIG. 1, the wall material 200 includes the wall odor sealant 100 and a surface substrate 210 .

[0012] (Composition of wall odor sealant) The wall odor sealant 100 is placed, for example, on the backside of wallpaper that is attached to the wall surface of a building. The wall odor sealant 100 also includes a barrier layer 10 , a primer layer 20 , and an adhesive layer 30 .

[0013] <Barrier layer> The barrier layer 10 is a layer that has the function of preventing indoor odors and odor-causing liquids from penetrating into the concrete or boards (hereinafter sometimes referred to as the "base") that form the walls of the building, and preventing various chemical substances from diffusing from the base into the room. The barrier layer 10 also includes a paper substrate layer 11, an anchor coat layer 12, a protective layer 15, a vapor deposition layer 13, and an overcoat layer 14.

[0014] (Paper base layer) The paper substrate layer 11 is disposed opposite the rear surface of the wallpaper and is a layer formed using a paper material. The configuration of the paper substrate layer 11 is not particularly limited, and can be selected appropriately depending on the application of the wallpaper to which the wall odor sealant 100 is applied. The material of the paper base layer 11 may be any paper whose main component is plant-derived pulp, and examples thereof include fine paper, special fine paper, coated paper, art paper, cast-coated paper, construction paper, kraft paper, and glassine paper.

[0015] The mass of the paper material of the paper base layer 11 is set to 50% by mass or more and 95% by mass or less based on the mass of the barrier layer 10. The reason for setting the mass of the paper material of the paper base layer 11 to 50% by mass or more based on the mass of the barrier layer 10 includes the fact that if the mass of the paper material of the paper base layer 11 is 50% by mass or more based on the mass of the barrier layer 10, it is possible to sufficiently reduce the amount of plastic material used. In addition, the large portion of the barrier layer 10 is made of paper, which is excellent in recyclability. In the first embodiment, as an example, a case will be described in which the mass of the paper that is the material of the paper base layer 11 is set to 80 mass % or more and 95 mass % or less based on the mass of the barrier layer 10. Note that the mass of the paper that is the material of the paper base layer 11 may also be set to 70 mass % or more and 95 mass % or less based on the mass of the barrier layer 10.

[0016] The thickness of the paper substrate layer 11 is set, for example, to 30 μm or more and 100 μm or less. The reason for setting the thickness of the paper substrate layer 11 to 30 μm or more and 100 μm or less is that if the thickness of the paper substrate layer 11 is 30 μm or more, the gas barrier property can be further improved compared to when the thickness of the paper substrate layer 11 is less than 30 μm. In addition, if the thickness of the paper substrate layer 11 is 100 μm or less, the diffusion of odors can be more stably suppressed compared to when the thickness of the paper substrate layer 11 is more than 100 μm.

[0017] In the first embodiment, as an example, a case where the thickness of the paper base layer 11 is set to 30 μm or more and 70 μm or less will be described. Furthermore, the thickness of the paper base layer 11 is not particularly limited, but is set to, for example, 70% or more of the thickness of the barrier layer 10. The reason for setting the thickness of the paper base layer 11 to 70% or more of the thickness of the barrier layer 10 includes the reason that if the thickness of the paper base layer 11 is 70% or more of the thickness of the barrier layer 10, it is possible to improve environmental suitability compared to when the thickness of the paper base layer 11 is less than 70% of the thickness of the barrier layer 10.

[0018] On the surface of the paper base layer 11 facing the anchor coat layer 12, a coat layer (not shown) is provided. By providing a coating layer on the paper base layer 11, it is possible to prevent the anchor coat layer 12 from penetrating into the paper that is the material of the paper base layer 11. In addition, it is possible to fulfill the role of a sealant that fills in irregularities formed on the paper that is the material of the paper base layer 11, making it possible to form the anchor coat layer 12 uniformly without defects. The coating layer uses binder resins such as styrene-butadiene, styrene-acrylic, and ethylene-vinyl acetate copolymers, polyvinyl alcohol resins, cellulose resins, paraffin (wax), etc. In addition, fillers such as clay, kaolin, calcium carbonate, talc, and mica are used.

[0019] The thickness of the coating layer is not particularly limited, but is set to, for example, 1 μm or more and 10 μm or less. The reason for setting the thickness of the coating layer to 1 μm or more and 10 μm or less is that if the thickness of the coating layer is 1 μm or more, the anchor coating layer 12 can be formed more uniformly. In addition, if the thickness of the coating layer is 10 μm or less, costs can be reduced and the multiple layers included in the barrier layer 10 can be formed uniformly. In the first embodiment, as an example, a case where the thickness of the coating layer is set to 3 μm or more and 8 μm or less will be described.

[0020] (Anchor coat layer) The anchor coat layer 12 is laminated on the surface of the paper base layer 11 opposite to the surface facing the wallpaper, and is a layer containing polyolefin. The polyolefin contained in the anchor coat layer 12 has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic acid ester. The anchor coat layer 12 may contain other components in addition to polyolefin, such as silane coupling agents, organic titanates, polyacrylics, polyesters, polyurethanes, polycarbonates, polyureas, polyamides, polyolefin emulsions, polyimides, melamine, and phenols.

[0021] The polyolefin content in the anchor coat layer 12 is set to, for example, 50% by mass or more. The reason for setting the polyolefin content in the anchor coat layer 12 to 50% by mass or more includes the reason that if the polyolefin content in the anchor coat layer 12 is 50% by mass or more, it is possible to improve the gas barrier properties and suppress the diffusion of odors. In the first embodiment, as an example, a case will be described in which the content of polyolefin in the anchor coat layer 12 is set to 70 mass % or more.

[0022] The thickness of the anchor coat layer 12 is set, for example, to 2 μm or more and 10 μm or less. The reason for setting the thickness of the anchor coat layer 12 to 2 μm or more and 10 μm or less is that if the thickness of the anchor coat layer 12 is 2 μm or more, it can fully fulfill its role as a heat seal layer. In addition, if the thickness of the anchor coat layer 12 is 10 μm or less, it can fully fulfill its role as a heat seal layer while keeping costs down. In the first embodiment, as an example, a case will be described in which the thickness of the anchor coat layer 12 is set to 3 μm or more and 8 μm or less.

[0023] The anchor coat layer 12 can be formed, for example, by applying a coating liquid containing a polyolefin and a solvent to the paper substrate layer 11 and drying it. Examples of solvents that can be used in the coating liquid include water, methyl alcohol, ethyl alcohol, isopropyl alcohol, n-propyl alcohol, n-butyl alcohol, n-pentyl alcohol, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, toluene, hexane, heptane, cyclohexane, acetone, methyl ethyl ketone, diethyl ether, dioxane, tetrahydrofuran, ethyl acetate, and butyl acetate. The solvents contained in the coating liquid can be used alone or in combination. In addition, from the viewpoint of properties, it is preferable to use methyl alcohol, ethyl alcohol, isopropyl alcohol, toluene, ethyl acetate, methyl ethyl ketone, or water as the solvent contained in the coating liquid, and more preferably to use methyl alcohol, ethyl alcohol, isopropyl alcohol, or water as the solvent contained in the coating liquid from the viewpoint of environmental impact.

[0024] (protective layer) The protective layer 15 is a layer containing a polyvinyl alcohol resin and is laminated on the surface of the anchor coat layer 12 opposite to the surface facing the paper base layer 11. The protective layer 15 is provided to improve the adhesion between the anchor coat layer 12 and the vapor deposition layer 13 and to improve the gas barrier properties (particularly the oxygen barrier properties) of the barrier layer 10. The polyvinyl alcohol resin includes, for example, a completely saponified polyvinyl alcohol resin, a partially saponified polyvinyl alcohol resin, a modified polyvinyl alcohol resin, an ethylene vinyl alcohol copolymer resin, and the like.

[0025] The degree of polymerization of the polyvinyl alcohol-based resin is set to be 300 or more and 1500 or less. The reason for setting the degree of polymerization of the polyvinyl alcohol-based resin to be 300 or more and 1500 or less includes the reason that if the degree of polymerization of the polyvinyl alcohol-based resin is 300 or more, the barrier property and flex resistance of the barrier layer 10 are improved. In addition, if the degree of polymerization of the polyvinyl alcohol-based resin is 1500 or less, the viscosity of the coating liquid of the polyvinyl alcohol-based resin is reduced, thereby improving the coatability.

[0026] The content of the polyvinyl alcohol resin in the protective layer 15 is set to, for example, 1% by mass or more and 100% by mass or less. In the first embodiment, as an example, a case will be described in which the content of the polyvinyl alcohol-based resin in the protective layer 15 is set to 30% by mass or more and 50% by mass or more. The reason for setting the content of the polyvinyl alcohol-based resin in the protective layer 15 to 30% by mass or more and 50% by mass or more includes the reason that if the content of the polyvinyl alcohol-based resin in the protective layer 15 is 50% by mass or more, it is possible to improve the gas barrier property and suppress the diffusion of odors. Note that the content of the polyvinyl alcohol-based resin in the protective layer 15 may be set to 20% by mass or more and 70% by mass or less.

[0027] The thickness of the protective layer 15 is set to, for example, 1 μm or more and 5 μm or less. The reason for setting the thickness of the protective layer 15 to 1 μm or more and 5 μm or less is that if the thickness of the protective layer 15 is 1 μm or more, it is possible to efficiently fill in the irregularities of the paper base layer 11, and it is possible to uniformly laminate the vapor-deposited layer 13. In addition, if the thickness of the protective layer 15 is 5 μm or less, it is possible to uniformly laminate the vapor-deposited layer 13 while suppressing costs. In the first embodiment, as an example, a case where the thickness of the protective layer 15 is set to 2 μm or more and 5 μm or less will be described.

[0028] The protective layer 15 is formed by applying a coating liquid containing a polyvinyl alcohol resin and a solvent to the anchor coat layer 12 and then drying the coating liquid. Examples of the solvent that can be used in the coating liquid include water, methyl alcohol, ethyl alcohol, isopropyl alcohol, n-propyl alcohol, n-butyl alcohol, n-pentyl alcohol, dimethyl sulfoxide, dimethylformamide, and dimethylacetamide. As the solvent contained in the coating liquid, it is particularly preferable to use a mixed solvent of water and an alcohol such as methyl alcohol, ethyl alcohol, isopropyl alcohol, etc. Furthermore, the coating liquid containing the solvent may contain additives such as a surfactant, a preservative, a storage stabilizer, a silane coupling agent, and an organic titanate.

[0029] The protective layer 15 having the above-described configuration has excellent flexibility, and can suppress cracking of the vapor deposition layer 13 after bending (folding), thereby suppressing deterioration of the gas barrier properties, and can also improve adhesion between the vapor deposition layer 13 and the anchor coat layer 12.

[0030] (vapor deposited layer) The vapor-deposited layer 13 is laminated on the surface of the protective layer 15 opposite to the surface facing the anchor coat layer 12, and is a layer formed by vapor-depositing a metal or an inorganic compound. The vapor-deposited layer 13 is a thin film layer containing at least one of aluminum oxide, silicon oxide, and magnesium oxide. The vapor-deposited layer 13 may contain trace amounts of impurities in addition to the inorganic oxide.

[0031] The thickness of the vapor-deposited layer 13 may be set appropriately depending on the intended use, but is set, for example, to 30 nm or more and 100 nm or less. The reason for setting the thickness of the vapor-deposited layer 13 to 30 nm or more and 100 nm or less is that setting the thickness of the vapor-deposited layer 13 to 30 nm or more makes it easier to ensure sufficient continuity of the vapor-deposited layer 13. In addition, setting the thickness of the vapor-deposited layer 13 to 100 nm or less makes it possible to sufficiently suppress the occurrence of curling and cracking, and makes it easier to achieve sufficient gas barrier performance and flexibility. In the first embodiment, as an example, a case where the thickness of the vapor deposition layer 13 is set to 50 nm or more and 80 nm or less will be described.

[0032] The deposition layer 13 is preferably formed by a vacuum deposition method from the viewpoint of oxygen gas barrier performance and film uniformity. While known deposition methods include vacuum deposition, sputtering, and chemical vapor deposition (CVD), vacuum deposition is preferred due to its high deposition rate and high productivity. As a heating method for vacuum deposition, it is preferred to use any of electron beam heating, resistance heating, and induction heating. Considering that the deposition rate can be easily controlled by the irradiation area and electron beam current, and that the temperature of the deposition material can be increased and decreased in a short time, electron beam heating is more preferred. Furthermore, deposition can be performed using a plasma-assisted method or an ion-beam-assisted method in order to improve the adhesion between the deposition layer 13 and the protective layer 15 and the density of the deposition layer 13. Furthermore, in order to improve the transparency of the deposition film that constitutes the deposition layer 13, reactive deposition can be used in which various gases such as oxygen are blown in during deposition.

[0033] (Overcoat layer) The overcoat layer 14 is laminated on the surface of the vapor deposition layer 13 opposite to the surface facing the protective layer 15, and is a layer containing polyolefin. The polyolefin contained in the overcoat layer 14 has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic acid ester. The overcoat layer 14 may contain other components in addition to polyolefin, such as a silane coupling agent, organic titanate, polyacrylic, polyester, polyurethane, polycarbonate, polyurea, polyamide, polyolefin emulsion, polyimide, melamine, or phenol.

[0034] The polyolefin content in the overcoat layer 14 is set to, for example, 50% by mass or more. The reason for setting the polyolefin content in the overcoat layer 14 to 50% by mass or more is that if the polyolefin content in the overcoat layer 14 is 50% by mass or more, it is possible to improve the gas barrier properties and suppress the diffusion of odors. In the first embodiment, as an example, a case will be described in which the content of polyolefin in the overcoat layer 14 is set to 70 mass % or more.

[0035] The thickness of the overcoat layer 14 is set to, for example, 2 μm or more and 10 μm or less. The reason for setting the thickness of the overcoat layer 14 to 2 μm or more and 10 μm or less is that if the thickness of the overcoat layer 14 is 2 μm or more, it can fully function as a heat seal layer. In addition, if the thickness of the overcoat layer 14 is 10 μm or less, it can fully exhibit adhesion and barrier properties to the vapor deposition layer while suppressing costs. In the first embodiment, as an example, a case where the thickness of the overcoat layer 14 is set to 3 μm or more and 8 μm or less will be described.

[0036] The overcoat layer 14 may be formed, for example, by applying a coating liquid containing a polyolefin and a solvent to the paper substrate layer 11 and drying the coating liquid. Examples of solvents that can be used in the coating liquid include water, methyl alcohol, ethyl alcohol, isopropyl alcohol, n-propyl alcohol, n-butyl alcohol, n-pentyl alcohol, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, toluene, hexane, heptane, cyclohexane, acetone, methyl ethyl ketone, diethyl ether, dioxane, tetrahydrofuran, ethyl acetate, and butyl acetate. The solvents contained in the coating liquid may be used alone or in combination.

[0037] In addition, from the viewpoint of properties, it is preferable to use methyl alcohol, ethyl alcohol, isopropyl alcohol, toluene, ethyl acetate, methyl ethyl ketone, or water as the solvent contained in the coating liquid, and more preferably to use methyl alcohol, ethyl alcohol, isopropyl alcohol, or water as the solvent contained in the coating liquid from the viewpoint of environmental impact.

[0038] <Primer layer> The primer layer 20 is a layer laminated on the overcoat layer 14 and is provided to improve the adhesion between the barrier layer 10 and the adhesive layer 30 . It is preferable to use a polybutylene carbonate resin as the primer constituting the primer layer 20. In addition to polybutylene carbonate resin, other resin materials such as ester-based resins, urethane-based resins, acrylic-based resins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral-based resins, and nitrocellulose-based resins can be used alone or in combination as the primer constituting the primer layer 20. The primer layer 20 is formed by applying the resin material to the barrier layer 10 using an appropriate application method such as roll coating or gravure printing.

[0039] The primer constituting the primer layer 20 can be formed from a resin containing a copolymer of an acrylic resin and a urethane resin and an isocyanate. The copolymer of an acrylic resin and a urethane resin can be obtained by blending and reacting an acrylic polymer component (component A) having hydroxyl groups at its terminals, a polyester polyol component (component B) having hydroxyl groups at both terminals, and a diisocyanate component (component C) to form a prepolymer, and then adding a chain extender (component D) such as diamine to the prepolymer to extend the chain.

[0040] By blending and reacting Components A, B, and C, polyester urethane is formed, and an acrylic polymer component is introduced into the molecule to form an acrylic-polyester urethane copolymer having hydroxyl groups at its terminals. The primer that constitutes the primer layer 20 is formed by reacting the hydroxyl groups at the terminals of the acrylic-polyester urethane copolymer with isocyanate to harden it.

[0041] A linear acrylic ester polymer having terminal hydroxyl groups is used as component A. In particular, linear polymethyl methacrylate (PMMA) having terminal hydroxyl groups is preferably used as component A because it has excellent weather resistance (particularly resistance to light degradation) and is easily copolymerized with urethane to achieve compatibility. Component A is an acrylic resin component in the copolymer, and from the viewpoint of weather resistance and adhesiveness, it is more preferable that the molecular weight (weight average molecular weight) is 5000 to 7000. Furthermore, Component A may be a polymer having hydroxyl groups at both ends alone, or a mixture of a polymer having a conjugated double bond remaining at only one end and a polymer having hydroxyl groups at both ends may be used.

[0042] Component B is a material that reacts with component C (diisocyanate component) to form a polyester urethane, forming a urethane resin component in the copolymer. Component B is a polyester diol having hydroxyl groups at both ends. Examples of polyester diols that can be used include: an addition reaction product of a diol compound having an aromatic or spiro ring skeleton with a lactone compound or its derivative, or an epoxy compound; a condensation product of a dibasic acid with a diol; and polyester compounds derived from a cyclic ester compound. Examples of diols that can be used include short-chain diols such as ethylene glycol, propylene glycol, diethylene glycol, butanediol, hexanediol, and methylpentenediol; and alicyclic short-chain diols such as 1,4-cyclohexanedimethanol.

[0043] The basic acid may be adipic acid, phthalic acid, isophthalic acid, terephthalic acid, etc. A preferred polyester polyol is an adipate polyester that uses adipic acid or a mixture of adipic acid and terephthalic acid as the acid component and 3-methylpentenediol and 1,4-cyclohexanedimethanol as the diol component.

[0044] The urethane resin component formed by the reaction of component B and component C imparts flexibility to the primer layer 20 and contributes to improving adhesion. In addition, the acrylic resin component containing an acrylic polymer contributes to the weather resistance and blocking resistance of the primer layer 20. The molecular weight of component B in the urethane resin may be within a range that allows a urethane resin to be obtained that can sufficiently exhibit flexibility in the primer layer 20. For example, when component B is a polyester diol containing adipic acid or a mixture of adipic acid and terephthalic acid, 3-methylpentenediol, and 1,4-cyclohexanedimethanol, it is preferable that the molecular weight of component B is 500 or more and 5,000 or less (weight average molecular weight).

[0045] An aliphatic or alicyclic diisocyanate compound having two isocyanate groups per molecule is used as component C. Examples of diisocyanate compounds that can be used include tetramethylene diisocyanate, 2,2,4(2,4,4)-1,6-hexamethylene diisocyanate, isophorone diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, and 1,4'-cyclohexyl diisocyanate. Isophorone diisocyanate is preferred as the diisocyanate component because of its excellent physical properties and cost. When components A to C are reacted, the equivalent ratio of the total hydroxyl groups (or amino groups) and isocyanate groups of the acrylic polymer, polyester polyol, and chain extender described below is adjusted so that the isocyanate groups are in excess.

[0046] When the three components A, B, and C are reacted in an environment of 60°C to 120°C for approximately 2 to 10 hours, the isocyanate group of the diisocyanate reacts with the hydroxyl group at the end of the polyester polyol to form a polyester urethane resin component, and a compound in which the diisocyanate is added to the hydroxyl group at the end of the acrylic polymer is also present.

[0047] This results in the formation of a prepolymer with excess isocyanate and hydroxyl groups remaining. A chain extender, such as a diamine (e.g., isophoronediamine or hexamethylenediamine), is added to the prepolymer to react the isocyanate groups with the chain extender, thereby extending the chain. This introduces the acrylic polymer component into the polyester urethane molecule, making it possible to obtain an acrylic-polyester urethane copolymer with terminal hydroxyl groups.

[0048] The coating solution is prepared by adding isocyanate to the acrylic-polyester urethane copolymer and adjusting the viscosity to the required level, taking into consideration the coating method and the amount of coating to be applied after drying. The prepared coating solution is applied to the barrier layer 10 by a well-known coating method such as gravure coating or roll coating, thereby forming the primer layer 20. The isocyanate may be any isocyanate capable of reacting with the hydroxyl groups of the acrylic-polyester urethane copolymer to crosslink and harden it, and for example, a divalent or higher aliphatic or aromatic isocyanate may be used. In particular, from the viewpoints of preventing thermal discoloration and weather resistance, it is desirable to use an aliphatic isocyanate. Specific examples of the aliphatic isocyanate include monomers of tolylene diisocyanate, xylylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, and lysine diisocyanate, as well as multimers such as dimers and trimers thereof, and polyisocyanates such as derivatives (adducts) of these isocyanates added to polyols.

[0049] The amount of the primer layer 20 applied after drying was 1 [g / m 2 ] or more than 20[g / m 2 ] or less, and 1 [g / m 2 ] or more than 5[g / m 2 ] or less is more preferable. Furthermore, the primer layer 20 may contain additives such as a filler such as silica powder, a light stabilizer, and a colorant, as needed.

[0050] <Adhesive layer> The adhesive layer 30 is a layer laminated on the primer layer 20 . The adhesive layer 30 includes, for example, an adhesive base material 31 and a pressure-sensitive adhesive layer 32 provided on the adhesive base material 31, and is formed in the shape of, for example, a sheet. The adhesive substrate 31 is a support formed using a mesh sheet material. Examples of the support include nonwoven fabric and woven fabric. The adhesive substrate 31 may also be a laminated cloth in which the support is bonded with a resin film, or a coated cloth in which the surface of the support is covered with a resin material.

[0051] The adhesive layer 32 is a layer containing an acrylic resin impregnated into a mesh sheet material and can be formed from a known resin material. Examples of resin materials that can be used for the adhesive layer 32 include styrene resins such as polystyrene and poly-α-methylstyrene, acrylic resins such as polymethyl methacrylate and polyethyl acrylate, vinyl resins such as polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, and polyvinyl acetal, polyester resins, polyamide resins, epoxy resins, polyurethane resins, petroleum resins, ionomers, synthetic resins such as ethylene-acrylic acid copolymers and ethylene-acrylic acid ester copolymers, cellulose derivatives such as nitrocellulose, ethyl cellulose, cellulose acetate propionate, and cellulose acetate butyrate, and natural and synthetic resins such as rosin, rosin-modified maleic acid resin, ester gum, polyisobutylene rubber, butyl rubber, styrene-butadiene rubber, butadiene-acrylonitrile rubber, and polychlorinated olefins. These resins can be used alone or in combination.

[0052] The amount of adhesive layer 32 formed (the amount of solid content remaining after applying and drying the coating liquid) was 0.1 [g / m 2 ] or more than 2.0[g / m 2 ] or less. In addition, known additives other than resins can be used in the adhesive layer 32 within the range that does not impair the above-mentioned performance. Examples of additives that can be used include inorganic pigment fine particles, isocyanate compounds, silane coupling agents, dispersants, viscosity modifiers, release agents, slip agents such as wax-resin fillers, ultraviolet absorbers, light stabilizers, antioxidants, fluorescent brighteners, and antistatic agents.

[0053] By providing the adhesive layer 30, the wall odor sealant 100 becomes a so-called tucked odor-proof sheet for building materials. Therefore, when applying the wall odor sealant 100, it can be easily attached to the substrate, improving the workability of the wall odor sealant 100. That is, the wall odor sealant 100 is tack-processed.

[0054] The above-described first embodiment is one example of the present invention, and the present invention is not limited to the above-described first embodiment. Various modifications can be made to forms other than this embodiment depending on the design, etc., as long as they do not deviate from the technical concept of the present invention.

[0055] (Effects of the first embodiment) The odor sealant for walls 100 of the first embodiment can achieve the following effects. (1) The sheet comprises an anchor coat layer 12 laminated on a paper base layer 11 and containing a polyolefin, a protective layer 15 laminated on the anchor coat layer 12 and containing a polyvinyl alcohol-based resin, and a vapor-deposited layer 13 laminated on the protective layer 15 and formed by vapor-depositing a metal or inorganic compound. In addition, the polyolefin contained in the anchor coat layer 12 has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic acid ester. Therefore, the vapor deposition layer 13 allows odors to pass through and prevents the odors from diffusing into the room, thereby providing a high deodorizing function.

[0056] As a result, it is possible to provide an odor sealant 100 for walls that can suppress adhesion of odors to wallpaper and buildings without reducing the design quality of the wallpaper. Furthermore, it is possible to improve the flexibility of the anchor coat layer 12, which makes it possible to suppress cracking of the vapor deposition layer 13 after bending (folding), and to improve the adhesion between the anchor coat layer 12 and the protective layer 15. In addition, it is possible to form a dense film using carboxyl groups or the like, making it possible to form a barrier layer 10 with excellent water vapor barrier properties.

[0057] (2) The thickness of the protective layer 15 is 1 μm or more and 5 μm or less. As a result, it becomes possible to efficiently fill in the irregularities in the paper base layer 11, and it becomes possible to laminate the vapor-deposited layer 13 uniformly.

[0058] (3) The thickness of the deposition layer 13 is 30 nm or more and 100 nm or less. As a result, it is possible to ensure sufficient gas barrier performance while suppressing the occurrence of curling and cracking, and it is also possible to improve flexibility.

[0059] (4) The thickness of the anchor coat layer 12 is 2 μm or more and 10 μm or less. As a result, it is possible to reduce the cost required for production and improve the adhesion to the paper base layer 11. In addition, it is possible to improve the barrier properties.

[0060] (5) The film further includes an overcoat layer 14 laminated on the vapor-deposited layer 13 and containing a polyolefin, and the polyolefin contained in the overcoat layer 14 has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic acid ester. As a result, it is possible to improve the flexibility of the overcoat layer 14, suppress cracking of the vapor deposition layer 13 after bending (folding), and improve adhesion between the overcoat layer 14 and the vapor deposition layer 13. In addition, it is possible to form a dense film using carboxyl groups, etc., and form a barrier layer 10 with excellent water vapor barrier properties.

[0061] (6) The thickness of the overcoat layer 14 is 2 μm or more and 10 μm or less. As a result, it is possible to reduce the manufacturing cost and improve the adhesion to the vapor deposition layer 13. In addition, it is possible to improve the barrier properties.

[0062] (7) Tuck processing has been applied. As a result, the construction can be easily carried out and high workability can be achieved.

[0063] Furthermore, the wall material 200 of the first embodiment can achieve the effects described below. (8) The wall odor sealant 100 and the surface substrate 210 laminated on the surface of the wall odor sealant 100 facing the wallpaper are provided. As a result, it is possible to provide a wall material 200 that can suppress the adhesion of odors to wallpaper and buildings without reducing the design quality of the wallpaper.

[0064] (Second embodiment) The configuration of the wall material 200 will be described below with reference to FIG. 2, the wall material 200 includes the wall odor sealant 100 and a surface substrate 210. The configuration of the surface substrate 210 is the same as that of the first embodiment described above, and therefore a description thereof will be omitted.

[0065] (Composition of wall odor sealant) The wall odor sealant 100 comprises a barrier layer 10 , a primer layer 20 , and an adhesive layer 30 . The configuration of the second embodiment is the same as that of the first embodiment described above, except for the configuration of the barrier layer 10, and therefore, a description of the primer layer 20 and the adhesive layer 30 will be omitted.

[0066] <Barrier layer> The barrier layer 10 includes a base paper layer 60, an anchor coat layer 12, a protective layer 15, a vapor deposition layer 13, and an overcoat layer 14. The configurations of the anchor coat layer 12, the protective layer 15, the vapor deposition layer 13, and the overcoat layer 14 are the same as those in the first embodiment described above, and therefore will not be described again.

[0067] (base paper layer) The base paper layer 60 is disposed opposite the back surface of the wallpaper and is a layer containing a paper material. The base paper layer 60 includes a paper substrate 61 , a first laminated resin layer 62 , and a second laminated resin layer 63 . The thickness of the base paper layer 60 is set to, for example, 15 μm or more and 150 μm or less. The reason for setting the thickness of the base paper layer 60 to 15 μm or more and 150 μm or less is that when the thickness of the base paper layer 60 is 15 μm or more, it is easy to peel off the surface substrate such as wallpaper or decorative material. In addition, when the thickness of the base paper layer 60 is 150 μm or less, it is possible to reduce manufacturing costs.

[0068] (Paper base material) The paper substrate 61 is made of a paper material. The configuration of the paper substrate 61 is not particularly limited, and can be selected appropriately depending on the application of the wallpaper to which the wall odor sealant 100 is applied. The material of the paper base material 61 may be any paper whose main component is plant-derived pulp, and examples thereof include fine paper, special fine paper, coated paper, art paper, cast-coated paper, construction paper, kraft paper, and glassine paper.

[0069] The mass of the paper that is the material of the paper base material 61 is set to 50% by mass or more and 95% by mass or less based on the mass of the barrier layer 10. The reason for setting the mass of the paper that is the material of the paper base material 61 to 50% by mass or more based on the mass of the barrier layer 10 is that if the mass of the paper that is the material of the paper base material 61 is 50% by mass or more based on the mass of the barrier layer 10, it is possible to sufficiently reduce the amount of plastic material used. In addition, since a large portion of the barrier layer 10 is made of paper based on the entire barrier layer 10, it is highly recyclable. In the second embodiment, as an example, a case will be described in which the mass of the paper that is the material of the paper base material 61 is set to 80 mass % or more and 95 mass % or less based on the mass of the barrier layer 10. Note that the mass of the paper that is the material of the paper base material 61 may also be set to 70 mass % or more and 95 mass % or less based on the mass of the barrier layer 10.

[0070] The thickness of the paper substrate 61 is set to, for example, 30 μm or more and 100 μm or less. The reason for setting the thickness of the paper substrate 61 to 30 μm or more and 100 μm or less is that if the thickness of the paper substrate 61 is 30 μm or more, the gas barrier properties can be further improved compared to when the thickness of the paper substrate 61 is less than 30 μm. In addition, if the thickness of the paper substrate 61 is 100 μm or less, the diffusion of odors can be more stably suppressed compared to when the thickness of the paper substrate 61 is more than 100 μm. In the second embodiment, as an example, a case where the thickness of the paper base material 61 is set to 30 μm or more and 70 μm or less will be described.

[0071] Furthermore, the thickness of the paper substrate 61 is not particularly limited, but is set to, for example, 70% or more of the thickness of the barrier layer 10. The reason for setting the thickness of the paper substrate 61 to 70% or more of the thickness of the barrier layer 10 includes the reason that if the thickness of the paper substrate 61 is 70% or more of the thickness of the barrier layer 10, it is possible to improve environmental suitability compared to when the thickness of the paper substrate 61 is less than 70% of the thickness of the barrier layer 10.

[0072] (First laminated resin layer) The first laminated resin layer 62 is laminated on the surface of the paper substrate 61 facing the anchor coat layer 12 . As the material for the first laminated resin layer 62, it is preferable to use a resin material such as a polyolefin resin. Examples of polyolefin resins that can be used include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), etc. In particular, polyethylene (PE) is preferably used as the polyolefin resin because it is inexpensive and has excellent processability.

[0073] (Second laminated resin layer) The second laminated resin layer 63 is laminated on the surface of the paper substrate 61 opposite to the surface facing the anchor coat layer 12 . As with the first laminated resin layer 62, the second laminated resin layer 63 is preferably made of a resin material such as a polyolefin resin.

[0074] (Formation of base paper layer) The base paper layer 60 is formed, for example, by extrusion laminating a resin material, which is the material for the first laminated resin layer 62 and the second laminated resin layer 63, onto a paper substrate 61.

[0075] The above-described second embodiment is one example of the present invention, and the present invention is not limited to the above-described second embodiment. Various modifications can be made to forms other than this embodiment depending on the design, etc., as long as they do not deviate from the technical concept of the present invention.

[0076] (Effects of the second embodiment) The odor sealant for walls 100 of the second embodiment can achieve the following effects. (1) The wallpaper is arranged opposite the back surface of the wallpaper and includes a base paper layer 60 containing a paper material, an anchor coat layer 12, a protective layer 15, and a vapor deposition layer 13. The base paper layer 60 includes a paper substrate 61 formed using a paper material, and at least one of a first laminated resin layer 62 and a second laminated resin layer 63. In addition, the polyolefin contained in the anchor coat layer 12 has at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic acid ester.

[0077] This makes it possible to apply the surface substrate 210 from the upper surface of the barrier layer 10 (the upper surface of the base paper layer 60). In addition, it is possible to improve water wetting resistance, and even if a large amount of water seeps in from the wall surface, it is possible to prevent damage to the barrier layer 10. As a result, it is possible to provide an odor sealant 100 for walls that can suppress adhesion of odors to wallpaper and buildings without reducing the design quality of the wallpaper.

[0078] The wall material 200 of the second embodiment can achieve the following effects. (2) The wall odor sealant 100 and the surface substrate 210 laminated on the surface of the wall odor sealant 100 facing the wallpaper are provided. As a result, it is possible to provide a wall material 200 that can suppress the adhesion of odors to wallpaper and buildings without reducing the design quality of the wallpaper. [Example]

[0079] With reference to the first embodiment, the odor sealant for walls of Example 1 and the odor sealants for walls of Comparative Examples 1 to 4 will be described below.

[0080] Example 1 The paper substrate layer was formed using clay-coated paper with a paper thickness of 28 μm and a clay-coated layer thickness of 5 μm. The anchor coat layer was formed by applying a coating solution containing a carboxyl salt (Chemipearl S500, manufactured by Mitsui Chemicals, Inc.) to the paper substrate layer using a bar coater and then drying in an oven. The thickness of the anchor coat layer was 3 μm.

[0081] The protective layer was prepared by first dissolving polyvinyl alcohol resin with a degree of saponification of 98% and a degree of polymerization of 500 in a solution of water:IPA mixed at a ratio of 8:2 to a solid content concentration of 10% by mass to prepare a coating solution. The coating solution was then applied to the anchor coat layer with a bar coater and then dried in an oven to form a protective layer with a thickness of 1 μm. The deposition layer was formed by vacuum deposition of aluminum onto the protective layer, with a thickness of 50 nm.

[0082] The overcoat layer was formed by applying a coating solution containing a carboxyl salt (Chemipearl S500, manufactured by Mitsui Chemicals, Inc.) to the vapor-deposited layer using a bar coater and then drying in an oven. The thickness of the overcoat layer was 3 μm. The barrier layer was formed by the above method.

[0083] After the barrier layer was formed, polybutylene carbonate resin was applied to the overcoat layer by gravure printing at a coating amount of 1 g / m2 as a solid content. 2 ] was applied. Next, an adhesive layer was formed by attaching an adhesive sheet (#703N, manufactured by Ebisu Kasei Co., Ltd.) to the surface of the polybutylene carbonate resin. The adhesive sheet was made by applying acrylic resin to the surface of laminate cloth, which is the adhesive substrate, and then drying it to form a pressure-sensitive adhesive layer. Furthermore, the polybutylene carbonate resin was dried to form a primer layer between the barrier layer and the adhesive layer. In this way, an odor sealant for walls of Example 1 was formed.

[0084] (Comparative Example 1) An odor sealant for walls of Comparative Example 1 was formed in the same manner as in Example 1, except that the barrier layer had the following configuration. Base paper made by Tenma Specialty Paper ("TNK28", basis weight: 28 [g / m 2 ]) was laminated with a polyethylene film having a thickness of 22 μm, which was made by sandwiching coated paper between the two. Furthermore, a polyethylene film having a thickness of 12 μm, which was laminated with "GL film" manufactured by Toppan Printing Co., Ltd., was laminated, and then an anchor layer formed using, for example, a urethane anchor agent with an acrylic resin as the main chain, was further laminated. Next, a "GL film" manufactured by Toppan Printing Co., Ltd. having a thickness of 12 μm was laminated to form a barrier layer. As the urethane anchor agent having an acrylic resin as the main chain that forms the anchor layer, for example, a two-component curing urethane resin formed using acrylic polyol and hexamethylene diisocyanate can be used.

[0085] (Comparative Example 2) An odor sealant for walls of Comparative Example 2 was formed in the same manner as in Example 1, except that the barrier layer had the following configuration. Base paper made by Tenma Specialty Paper ("TNK28", basis weight: 28 [g / m 2 ]) was laminated with a 12 μm thick “GL film” manufactured by Toppan Printing Co., Ltd. to form a barrier layer.

[0086] (Comparative Example 3) An odor sealant for walls of Comparative Example 3 was formed in the same manner as in Example 1, except that the barrier layer had the following configuration. Base paper made by Tenma Specialty Paper ("TNK28", basis weight: 28 [g / m 2 ]) was laminated with a 22 μm thick polyethylene film sandwiched between coated paper. A 12 μm thick polyethylene film laminated with Toppan Printing's "GL Film" was then laminated, followed by an anchor layer formed using, for example, a urethane anchor agent with an acrylic resin main chain. Next, a biaxially oriented ethylene-vinyl alcohol copolymer (EVOH) film was laminated to form a barrier layer.

[0087] Comparative Example 4 An odor sealant for walls of Comparative Example 4 was formed in the same manner as in Example 1, except that the barrier layer had the following configuration. Base paper made by Tenma Specialty Paper ("TNK28", basis weight: 28 [g / m 2 ]) was laminated with a biaxially oriented ethylene-vinyl alcohol copolymer (EVOH) film to form a barrier layer.

[0088] (Performance evaluation, evaluation results) The wall odor sealant of Example 1 and the wall odor sealants of Comparative Examples 1 to 4 were applied to the underlayer of wallpaper in different rooms, and the odor suppression function, workability (machinability), cost (manufacturing cost), and environmental impact were evaluated for each room. The evaluation methods used were as follows.

[0089] <Odor suppression function> Indoor air quality was measured in each room on multiple measurement days to confirm the odor suppression effect. To evaluate the odor suppression function, seven evaluators smelled the odor in each room where odor was observed before the wall odor sealant and wall material were installed, and after a specified period of time had passed since the wall odor sealant and wall material were installed. If all seven observers were able to confirm odor suppression before and after application of the wall odor sealant, they rated the case as "○", and if all seven observers were unable to confirm odor suppression before and after application of the wall odor sealant, they rated the case as "×".

[0090] <Workability> The wall odor sealant was cut with scissors or a cutter, and if it was possible to easily cut the wall odor sealant, it was rated as "○", and if it was possible to cut the wall odor sealant but with difficulty, it was rated as "×".

[0091] <Cost> The manufacturing cost of the wall odor sealant was evaluated as "○" if the manufacturing cost of the wall odor sealant was low, and as "△" if the manufacturing cost of the wall odor sealant was more expensive than the evaluation "○".

[0092] <Environmental suitability> A relative comparison of the resin usage rate throughout the entire wall odor sealant was made, and cases where the resin usage rate throughout the entire wall odor sealant was low were evaluated as ``○'', and cases where the resin usage rate throughout the entire wall odor sealant was high compared to the evaluation ``○'' were evaluated as ``△''.

[0093] (Evaluation results) The evaluation results for odor suppression function, workability, cost, and environmental compatibility are shown below.

[0094] [Table 1]

[0095] As a result of evaluating various performances using the above-mentioned methods, the odor sealant for walls of Example 1 showed excellent performance in all evaluation tests, while the odor sealants for walls of Comparative Examples 1 to 4 were unable to show excellent performance in all evaluation tests. From the above evaluation results, it was confirmed that the odor suppression effect was higher in rooms where the wall odor sealant of Example 1 was used than in rooms where the wall odor sealants of Comparative Examples 3 and 4 were used.

[0096] Furthermore, it was confirmed that the odor sealant for walls of Example 1 had higher workability than the odor sealant for walls of Comparative Example 2. Furthermore, it was confirmed that the wall odor sealant of Example 1 had lower production costs than the wall odor sealants of Comparative Examples 1 and 2.

[0097] Furthermore, it was confirmed that the odor sealant for walls of Example 1 was more environmentally friendly than the odor sealants for walls of Comparative Examples 1-4. Therefore, it has become clear that by placing the wall odor sealant of the present invention on the backside of wallpaper, it is possible to obtain odor suppression effects as well as high environmental compatibility without compromising ease of application. [Explanation of symbols]

[0098] 10...barrier layer, 11...paper substrate layer, 12...anchor coat layer, 13...vapor deposition layer, 14...overcoat layer, 15...protective layer, 20...primer layer, 30...adhesive layer, 31...adhesive substrate, 32...adhesive layer, 60...base paper layer, 61...paper substrate, 62...first laminated resin layer, 63...second laminated resin layer, 100...wall odor sealant, 200...wall material, 210...surface substrate

Claims

1. A wall odor sealant to be placed on the backside of wallpaper, A paper base layer disposed opposite the back surface of the wallpaper and formed using a paper material; an anchor coat layer laminated on the surface of the paper base layer opposite to the surface facing the wallpaper and containing polyolefin; a protective layer laminated on the surface of the anchor coat layer opposite to the surface facing the paper base layer, the protective layer containing a polyvinyl alcohol-based resin; a vapor-deposited layer formed by vapor-depositing a metal or an inorganic compound, the vapor-deposited layer being laminated on a surface of the protective layer opposite to the surface facing the anchor coat layer, The polyolefin contained in the anchor coat layer has at least one of a carboxyl group, a polyolefin having a monomer unit having a salt of a carboxyl group, and a carboxylic anhydride group.

2. A wall odor sealant to be placed on the backside of wallpaper, a base paper layer disposed opposite the back surface of the wallpaper and including a paper material; an anchor coat layer containing polyolefin, the anchor coat layer being laminated on the surface of the base paper layer opposite to the surface facing the wallpaper; a protective layer laminated on the surface of the anchor coat layer opposite to the surface facing the base paper layer, the protective layer containing a polyvinyl alcohol-based resin; a vapor-deposited layer formed by vapor-depositing a metal or an inorganic compound, the vapor-deposited layer being laminated on a surface of the protective layer opposite to the surface facing the anchor coat layer, The base paper layer includes a paper base material formed using a paper material, and at least one of a first laminated resin layer laminated on a surface of the paper base material facing the anchor coat layer and a second laminated resin layer laminated on a surface of the paper base material opposite to the surface facing the anchor coat layer, The polyolefin contained in the anchor coat layer has at least one of a carboxyl group, a polyolefin having a monomer unit having a salt of a carboxyl group, and a carboxylic anhydride group.

3. 3. The odor sealant for walls according to claim 1, wherein the thickness of the protective layer is 1 μm or more and 5 μm or less.

4. 4. The odor sealant for walls according to claim 1, wherein the thickness of the vapor-deposited layer is 30 nm or more and 100 nm or less.

5. 5. The odor sealant for walls according to claim 1, wherein the thickness of the anchor coat layer is 2 μm or more and 10 μm or less.

6. 6. The odor sealant for walls according to claim 1, wherein the degree of polymerization of the polyvinyl alcohol-based resin is in the range of 300 to 1500.

7. an overcoat layer containing polyolefin laminated on a surface of the vapor deposition layer opposite to the surface facing the protective layer; 7. The odor sealant for walls according to claim 1, wherein the polyolefin contained in the overcoat layer has at least one of a carboxyl group, a polyolefin having a monomer unit having a salt of a carboxyl group, and a carboxylic anhydride group.

8. 8. The odor sealant for walls according to claim 7, wherein the thickness of the overcoat layer is 2 [mu]m or more and 10 [mu]m or less.

9. A wall odor sealant according to any one of claims 1 to 8; A wall material comprising: a surface substrate laminated on the surface of the wall odor sealant facing the wallpaper.

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