JP2016190904A - Adhesive sheet for wall surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive sheet for a wall surface having immediate effectivity showing high microorganism antiproliferative activity at the execution time of pasting onto the wall surface.SOLUTION: In an adhesive sheet 1 for a wall surface which has on a substrate 11, a microcapsule including layer 12 including a microencapsulated microorganism antiproliferative agent (microcapsule) 121, and which is to be pasted onto the wall surface with the microcapsule including layer 12 faced toward the wall surface side, the microcapsule 121 is broken by force applied to the microcapsule including layer 12 upon pasting of the adhesive sheet 1 for the wall surface onto the wall surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wall surface adhesive sheet having an immediate effect of suppressing microbial growth at a construction site during construction.

For exterior walls of buildings, interior walls and ceilings of bathrooms (hereinafter sometimes abbreviated as “wall surfaces”), for the purpose of enhancing the design and protecting these parts, An adhesive sheet for wall surfaces such as wallpaper may be attached.
When affixing such a wall surface adhesive sheet to a wall surface, the wall surface of the relevant part before application may be treated with a microbial growth inhibitor. This is because after the application of the adhesive sheet for a wall surface, the application surface of the sheet on the wall surface is likely to be in a condition suitable for the growth of microorganisms, such as poor air permeability and difficulty in removing moisture. When microorganisms grow on the affixing surface, the adhesive sheet for the wall surface is discolored and the appearance is deteriorated. In addition, microorganisms may be released into the affixing space of the sheet. End up. Therefore, such an adverse effect may be suppressed by treating the affixed portion of the wall surface with a microbial growth inhibitor.

  Such treatment is usually performed by using a surface treatment agent containing a bactericide or the like as the wall surface treatment agent and treating the intended wall surface with this surface treatment agent. By performing such treatment, in addition to the ground treatment for reducing the unevenness of the wall surface, a treatment for killing microorganisms on the wall surface is also performed. However, in this process, there is a possibility that the worker may directly touch the bactericide during the operation, and thus there is a problem on the safety of the worker such that skin irritation and other symptoms are likely to occur.

  On the other hand, as a technique that can solve such safety problems, a technique of using a microbicide in a microcapsule has been disclosed (see Patent Documents 1 and 2). If such microencapsulated disinfectant or the like is used, there is no possibility that an operator directly touches the disinfectant or the like during work. And on the wall surface which processed, the disinfectant etc. which were discharge | released from the microcapsule express microbial growth inhibitory effect.

Japanese Patent No. 4121380 JP 2002-114947 A

  However, in the microcapsulated bactericides and the like disclosed in Patent Documents 1 and 2, the bactericides and the like are gradually released from the microcapsules. Therefore, the microbial growth inhibitory action is gradually developed, and there is a problem that the immediate effect showing a high microbial growth inhibitory action immediately after construction is low.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the adhesive sheet for wall surfaces which has the immediate effect which shows a high microorganisms growth inhibitory effect immediately at the time of construction stuck on a wall surface.

In order to solve the above problems, the present invention is provided with a microcapsule-containing layer containing a microencapsulated microorganism growth inhibitor on a substrate, and the microcapsule-containing layer is attached to a wall surface facing the wall surface side. The wall surface adhesive sheet, wherein the microcapsule is disintegrated by a force applied to the microcapsule-containing layer when the wall surface adhesive sheet is attached to the wall surface. Provide a sheet.
In the adhesive sheet for wall surface of the present invention, it is preferable that the microcapsule-containing layer further contains a water-soluble polymer.
In the adhesive sheet for wall surfaces of this invention, it is preferable that the said microcapsule content layer contains an adhesive base material further.

  ADVANTAGE OF THE INVENTION According to this invention, the adhesive sheet for wall surfaces which has the immediate effect which shows a high microorganisms growth inhibitory effect immediately at the time of construction stuck on a wall surface is provided.

It is sectional drawing which illustrates typically one Embodiment of the adhesive sheet for wall surfaces which concerns on this invention. It is sectional drawing which illustrates typically other embodiment of the adhesive sheet for wall surfaces which concerns on this invention. It is sectional drawing which illustrates typically other embodiment of the adhesive sheet for wall surfaces which concerns on this invention. It is sectional drawing which illustrates typically other embodiment of the adhesive sheet for wall surfaces which concerns on this invention.

<< Wall Adhesive Sheet >>
A wall surface adhesive sheet according to the present invention comprises a microcapsule-containing layer containing a microencapsulated microorganism growth inhibitor on a substrate, and the microcapsule-containing layer is attached to a wall surface facing the wall surface side. A wall surface adhesive sheet, wherein the microcapsule is disintegrated by a force applied to the microcapsule-containing layer when the wall surface adhesive sheet is attached to the wall surface.
In the adhesive sheet for wall surface according to the present invention, the microcapsule is pressure-sensitive so that it collapses due to the force applied to the microcapsule-containing layer. By being added, the microcapsule is disintegrated, and the contained microbial growth inhibitor is released from the microcapsule in a short time, and immediately exhibits a high microbial growth inhibitory action.
In the present specification, unless otherwise specified, the description of “the sheet” means “an adhesive sheet for a wall surface”. Unless otherwise specified, the description of “microcapsule” means a microcapsule exhibiting the above-described immediate effect.

  The wall surface adhesive sheet is not particularly limited as long as it has the above-described configuration, and preferably has an improved design on the outer wall of a building, the inner wall and ceiling of a room (including the inside of a bathroom), and the like. Or what is used for the purpose of protecting these places can be illustrated, but it is not limited to these.

  The wall surface adhesive sheet is formed, for example, by forming an adhesive layer on the surface of the microcapsule-containing layer, and bonding the wall to the wall surface via the adhesive layer, or further bonding the microcapsule-containing layer to the adhesive base material. As an adhesive layer containing, the microcapsule-containing layer (adhesive layer) itself can be fixed to the wall surface by bonding to the wall surface.

<Base material sheet>
The material of the base sheet is not particularly limited and can be arbitrarily selected according to the purpose.
The material of the base sheet may be only one type, or two or more types, and in the case of two or more types, the combination and ratio can be arbitrarily selected according to the purpose.

  Preferred examples of the base sheet include those containing cellulose and those containing synthetic resin.

  Examples of the substrate sheet containing cellulose include those made of cellulose and those containing cellulose as a main component, and are particularly suitable when the wall surface adhesive sheet is used as wallpaper used indoors. Here, “having cellulose as a main component” means containing cellulose to such an extent that the characteristics of cellulose are clearly seen.

  More specifically, as a base sheet made of cellulose or a base sheet mainly composed of cellulose, ordinary pulp paper; a pulp-based flame retardant impregnated with a water-soluble flame retardant such as guanazine sulfanilate or guanazine phosphate Paper: Inorganic paper mixed with inorganic agent such as calcium carbonate, aluminum hydroxide, magnesium hydroxide; paper mixed with acrylic fiber or polyester fiber, etc. can be exemplified.

  The cellulose content of the substrate sheet containing cellulose is preferably 80% by mass or more, more preferably 85% by mass or more, further preferably 90% by mass or more, and 100% by mass. May be.

  The base sheet containing cellulose is fibrous as a whole, or the ratio of the fibrous portion is high, and the air permeability is good. Therefore, when the microcapsule-containing layer contains a microbial growth inhibitor after the wall surface adhesive sheet is attached to the wall surface, the microbial growth inhibitor is likely to diffuse into the base sheet, The sheet has a microbial growth inhibitory effect not only on the wall surface side but also in the base material sheet, and has a high microbial growth inhibitory effect as the entire wall surface adhesive sheet.

  The substrate sheet containing cellulose preferably has an air permeability (JIS P 8117) of 1 to 100 seconds, and more preferably 1 to 50 seconds. The lower the air permeability of the substrate sheet containing cellulose, the higher the microbial growth inhibitory effect of the entire wall surface adhesive sheet.

  Examples of the base sheet containing a synthetic resin include those made of a synthetic resin and those containing a synthetic resin as a main component, and in particular, to enhance the design of the wall surface regardless of the construction (attachment) location. This is suitable for use as a decorative sheet. Here, “having a synthetic resin as a main component” means that the synthetic resin is contained to such an extent that the characteristics of the synthetic resin can be clearly seen.

  The synthetic resin in the base sheet is not particularly limited and can be arbitrarily selected according to the purpose. Polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyvinylidene chloride (PVDC), polymethyl Acrylic resins such as pentene (PMP), polycycloolefin, polystyrene (PS), polyvinyl acetate (PVAc), polymethyl methacrylate (PMMA), AS resin, ABS resin, polyamide (PA), polyimide, polyamideimide (PAI) ), Polyacetal, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), polyphenylene sulfide (PPS), Resulfone (PSF), polyethersulfone (PES), polyetherketone (PEK), polyetheretherketone (PEEK), polycarbonate (PC), polyurethane, polyphenylene ether (PPE), modified polyphenylene ether (m-PPE), poly Examples include arylate, epoxy resin, melamine resin, phenol resin, urea resin, and the like.

In the base material sheet containing cellulose or synthetic resin as a main component, the types of components other than the main component are not particularly limited, and can be arbitrarily selected according to the purpose.
Only one type of component other than the main component in the base sheet may be used, or two or more types may be used, and when there are two or more types, the combination and ratio can be arbitrarily selected according to the purpose.

Substrate sheet is intended basis weight of ^20g / ^{m 2 ~200g} / m 2 is generally, from the viewpoint of manufacturing cost and mechanical strength, a basis weight of at ^70g / ^{m 2 ~100g} / m 2 Some are preferred.

  Although the thickness of a base material sheet is not specifically limited, It is preferable that it is 40-200 micrometers.

The substrate sheet may be composed of a single layer or may be composed of two or more layers. When the base sheet is composed of a plurality of layers, the plurality of layers may be the same as or different from each other. That is, all the layers may be the same, all the layers may be different, or only some of the layers may be different. And when several layers differ from each other, the combination of these several layers is not specifically limited. Here, the plurality of layers being different from each other means that at least one of the material and the thickness of each layer is different from each other.
When the base sheet is composed of a plurality of layers, the total thickness of each layer may be set to the thickness of the preferable base sheet.

<Microcapsule-containing layer>
The microcapsule-containing layer is provided on the base sheet, and is usually provided on one main surface of the base sheet.
Further, the microcapsule-containing layer contains a microbial growth inhibitor (hereinafter, sometimes simply referred to as “microcapsule”) microencapsulated with a film-forming component. That is, the microcapsule-containing layer contains a microbial growth inhibitor and a film-forming component that contains (encloses) the inside and forms a capsule film.
The microcapsule-containing layer has a composition containing components necessary for its formation, such as the microbial growth inhibitor and a film-forming component, attached on a base material, and, if necessary, other treatments such as drying treatment and heat treatment. It can be formed by processing. The heat treatment may also serve as a drying treatment.

  More specifically, the microcapsule-containing layer may be abbreviated as a layer containing a water-soluble polymer in addition to the microencapsulated microorganism growth inhibitor (hereinafter referred to as “water-soluble polymer-containing layer”). In addition to the microencapsulated microorganism growth inhibitor, a layer containing an adhesive base material (hereinafter sometimes abbreviated as “adhesive layer”) and the like can be exemplified.

When the microcapsule-containing layer is the water-soluble polymer-containing layer, the microcapsules are held on the substrate by the water-soluble polymer. That is, the water-soluble polymer is a component that fixes the microcapsules on the substrate.
The wall surface adhesive sheet in which the microcapsule-containing layer is the water-soluble polymer-containing layer is formed by separately forming an adhesive layer on the surface of the microcapsule-containing layer and pasting the adhesive layer on the wall surface through the adhesive layer. Fix to the wall. The adhesive layer separately formed in this case is hereinafter referred to as an “additional adhesive layer” in order to distinguish the microcapsule-containing layer itself from the adhesive layer, and unless otherwise specified, a simple “adhesive layer”. The description "" means that the microcapsule-containing layer itself is an adhesive layer.

When the microcapsule-containing layer is the adhesive layer, the microcapsules are held on the base material by the adhesive base material. That is, the adhesive layer fixes the microcapsule on the base material, and fixes the wall surface adhesive sheet to the wall surface.
Hereinafter, the case where the microcapsule-containing layer is the adhesive layer and the case where the microcapsule-containing layer is the water-soluble polymer-containing layer will be described in more detail.

[Adhesive layer]
(Adhesive base material)
The adhesive base material may be a known one and is not particularly limited, but is used as an aqueous emulsion dispersed in an aqueous medium from the viewpoint of further improving dispersibility in the adhesive layer of microcapsules described later. Is preferred. Here, the “aqueous medium” means a liquid medium that can be uniformly mixed with water.

  As for the adhesive base material which the said adhesive bond layer contains, only 1 type may be sufficient and 2 or more types may be sufficient, and when it is 2 or more types, the combination and ratio can be arbitrarily set according to the objective.

The content of the adhesive base material of the adhesive layer is not particularly limited as long as the adhesive layer has appropriate adhesiveness, but is preferably 70% by mass or more (relative to the total amount of the adhesive layer). 80% by mass or more is more preferable. The adhesive force of an adhesive bond layer improves more because the said content of an adhesive base material is more than the said lower limit.
The upper limit of the content of the adhesive base material of the adhesive layer is not particularly limited, but is preferably 90% by mass, and by being in such a range, characteristics other than the adhesive strength of the adhesive layer are more. improves.

(Microbial growth inhibitor)
The microbial growth inhibitor may be a known one, and is not particularly limited, and may be either an organic compound or an inorganic compound having a microbial growth inhibitory action.
Specific examples of the microbial growth inhibitor include compounds having antibacterial, antifungal or antialgal properties, and examples thereof include bactericides, antibacterial agents, fungicides, antiseptics, and algaecides.

As the microbial growth inhibitor, more specifically, thiophene compounds such as 3,3,4,4-tetrachlorotetrahydrothiophene-1,1-dioxide (one or more hydrogen atoms of thiophene or tetrahydrothiophene are hydrogen Compounds substituted with groups other than atoms, or compounds in which one or more groups are further introduced into thiophene or tetrahydrothiophene);
2-n-octyl-4-isothiazolin-3-one, 2-ethyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, 5-chloro-2-t-octyl-4- Isothiazolin-3-one, 5-chloro-2-ethyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, 4,5-dichloro-2-n-octyl- 4-isothiazolin-3-one, 4,5-dichloro-2-cyclohexyl-4-isothiazolin-3-one, 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, 1,2-benzisothiazoline Isothiazoline-based compounds such as -3-one and n-butyl-benzoisothiazolin-3-one (one or more hydrogen atoms of isothiazoline are substituted with groups other than hydrogen atoms) Which compounds);
Organic iodine compounds (organic compounds having an iodine atom) such as 3-iodo-2-propynylbutyl carbamate, diiodomethyl-p-toluylsulfone, p-chlorophenyl-3-iodopropargyl formal;
Dithiol compounds (compounds having two sulfur atoms) such as 4,5-dichloro-1,2-dithiol-3-one;
Thiocarbamate compounds such as tetramethylthiuram disulfide (compounds having a bond represented by the formula “N—C (═S) —S”);
Nitrile compounds (compounds having a cyano group) such as 2,4,5,6-tetrachloroisophthalonitrile;
Haloalkylthio compounds (having a haloalkylthio group) such as N- (fluorodichloromethylthio) -phthalimide, N- (fluorodichloromethylthio) -N, N′-dimethyl-N-phenyl-sulfamide, N- (trichloromethylthio) phthalimide Compound);
Pidirine compounds such as 2,3,5,6-tetrachloro-4- (methylsulfonyl) pyridine (compounds in which one or more hydrogen atoms of pyridine are substituted with groups other than hydrogen atoms);
Pyrithione compounds such as zinc pyrithione and sodium pyrithione (compounds in which one or more hydrogen atoms of pyrithione are substituted with groups other than hydrogen atoms);
Benzothiazole compounds such as 2- (4-thiocyanomethylthio) benzothiazole (compounds in which one or more hydrogen atoms of benzothiazole are substituted with groups other than hydrogen atoms);
Triazine compounds such as 2-methylthio-4-t-butylamino-6-cyclopropylamino-s-triazine (compounds in which one or more hydrogen atoms of triazine are substituted with groups other than hydrogen atoms);
Methyl-2-benzimidazole carbamate, 2- (4-thiazolyl) -benzimidazole, methyl-N- (1H-benzimidazol-2-yl) carbamate, 2- (1,3-thiazol-4-yl) -1H -Imidazole compounds such as benzimidazole and imazalyl (compounds in which one or more hydrogen atoms of imidazole are substituted with groups other than hydrogen atoms);
1-[[2- (2,4-Dichlorophenyl) -1,3-dioxan-2-yl] methyl] -1H-1,2,4-triazole, (±) -α [2- (4-chlorophenyl) ethyl ] -Α- (1,1-dimethylethyl) -1H-1,2,4-triazole- (1) -ethanol (tepconazole), (±) -1- [2- (2,4-dichlorophenyl)- Triazole compounds such as 4-propyl-1,3-dioxane-2-ylmethyl] -1H-1,2,4-triazole (compounds in which one or more hydrogen atoms of triazole are substituted with groups other than hydrogen atoms);
Oxathiazine compounds such as 3-benzo [b] thien-2-yl-5,6-dihydro-1,4,2-oxathiazine-4-oxide (one or more hydrogen atoms of oxathiazine are groups other than hydrogen atoms) Substituted compounds);
Alcohol compounds (compounds having a hydroxyl group) such as 2,2-dibromo-2-nitroethanol and 2-bromo-2-nitropropane-1,3-diol;
Urea compounds such as 3- (3,4-dichlorophenyl) -1,1-dimethylurea (compounds in which one or more hydrogen atoms of urea are substituted with groups other than hydrogen atoms);
Amide-based compounds (compounds having an amide bond) such as 2,2-dibromo-3-nitrilopropanamide;
Chlorites such as sodium chlorite;
Hypochlorites such as calcium hypochlorite and sodium hypochlorite;
Isothiazoline compounds such as isothiazolinone, methylisothiazolinone, chloromethylisothiazolinone, octylisothiazolinone, dichlorooctylisothiazolinone, benzisothiazolinone (one or more hydrogen atoms are substituted by groups other than hydrogen atoms) Optionally isothiazolinone);
Chlorothalonil;
Examples thereof include 1- (diiodomethylsulfonyl) -4-methylbenzene.

  The microbial growth inhibitor contained in the adhesive layer may be only one type, or two or more types, and in the case of two or more types, the combination and ratio can be arbitrarily set according to the purpose.

The said microbial growth inhibitor may use together the thing with a strong microbial growth inhibitory effect, and a medium or less thing. In this case, those having a strong microbial growth-inhibiting action are more useful for the expression of immediate effect at the time of construction than the sustainability that the effect lasts for a long time after construction (hereinafter abbreviated as “proactive agent”). And those having a moderate microbial growth inhibitory effect are more useful than the immediate effect due to the development of the sustainability (hereinafter sometimes abbreviated as “pro-sustainable agent”). And by using these microbial growth inhibitor together, sufficient microbial growth inhibitory effect can be maintained over the long period after construction from the time of construction.
Among the microbial growth inhibitors, examples of the immediate action agent include a bactericidal agent, and examples of the prolongation agent include microbial growth inhibitors other than the bactericidal agent.

  When the immediate-acting agent and the pro-longing agent are used in combination as the microbial growth inhibitor, their use ratio ([pro-active agent]: [pro-longing agent], mass ratio) is 10:90. Is preferably 90:10, more preferably 25:75 to 75:25, and particularly preferably 40:60 to 60:40. By setting it as such a range, the immediate effect and sustainability of a microbial growth inhibitor express well.

  The content of the microbial growth inhibitor in the adhesive layer is not particularly limited as long as the wall surface adhesive sheet has the desired microbial growth inhibitory effect, but 0.05 to 10 (relative to the total amount of the adhesive layer). It is preferably 0.0% by mass, more preferably 0.1 to 8.0% by mass. When the content of the microbial growth inhibitor is equal to or more than the lower limit value, the microbial growth inhibitory effect of the wall surface adhesive sheet is further improved. Moreover, characteristics other than the microbial growth inhibitory property of an adhesive bond layer improve more because the said content of a microbial growth inhibitor is below the said upper limit.

(Film forming component)
The film forming component may be a known component and is not particularly limited.
Specific examples of the film forming component include components that form a film when microencapsulated by a chemical method, a physicochemical method, or a physical and mechanical method.

  Examples of the chemical method among the microencapsulation methods include an interfacial polymerization method, an in situ polymerization method, a liquid-cured coating method, and the like.

  Examples of the interfacial polymerization include a method of interfacially polymerizing a polybasic acid halide and a polyol to form a film made of polyester, a method of interfacially polymerizing a polybasic acid halide and a polyamine to form a film made of polyamide, Examples thereof include a method of interfacially polymerizing isocyanate and polyol to form a film made of polyurethane, and a method of interfacially polymerizing polyisocyanate and polyamine to form a film made of polyurea.

  As the in situ polymerization method, a film composed of a copolymer of one kind selected from melamine and urea and formalin or an initial polycondensate thereof and a partial hydrolyzate of a styrene maleic anhydride copolymer is formed. Method, a method of forming a film made of polystyrene copolymer by copolymerizing styrene and divinylbenzene, a method of forming a film made of polymethacrylate copolymer by copolymerizing methyl methacrylate and n-butyl methacrylate, etc. Can be illustrated.

  Examples of the submerged cured coating method include a method of curing gelatin, polyvinyl alcohol, epoxy resin, sodium alginate or the like in the liquid.

Among the microencapsulation methods, physicochemical methods include simple coacervation method; complex coacervation method; pH control method; phase separation method from aqueous solution such as non-solvent addition method and phase separation from organic solvent Examples thereof include coacervation methods. Examples of the film forming component used in these physicochemical methods include gelatin, cellulose, gelatin-gum arabic and the like.
Examples of the physicochemical method include an interfacial sedimentation method using polystyrene or the like.

  Among the microencapsulation methods, physical and mechanical methods include spray drying, air suspension coating, vacuum deposition coating, electrostatic coalescence, melt dispersion cooling, inorganic wall encapsulation, etc. It can be illustrated. Examples of the film forming component used in these physical and mechanical methods include gelatin, gum arabic, polyvinylpyrrolidone, carboxymethylcellulose, methylcellulose, sodium alginate and the like.

  The microencapsulation method may be appropriately selected in consideration of the type of microbial growth inhibitor and the like. For example, the interfacial polymerization method is a preferable method in terms of a wide range of application.

  The film forming component contained in the adhesive layer may be only one type, or two or more types, and in the case of two or more types, the combination and ratio can be arbitrarily set depending on the purpose.

  The content of the film-forming component of the adhesive layer is not particularly limited as long as the microorganism growth inhibitor can be microencapsulated, but is 2.0 to 30.0% by mass (relative to the total amount of the adhesive layer). It is preferable and it is more preferable that it is 5.0-20.0 mass%. When the content of the film-forming component is not less than the lower limit value, the microbial growth inhibitor can be more stably microencapsulated, and the pressure sensitivity of the microcapsule can be further improved (when force is applied). Microcapsules are more likely to disintegrate). Moreover, the excessive use of a film formation component is suppressed because the said content of a film formation component is below the said upper limit.

The film constituting the microcapsule may be composed of a single layer or may be composed of two or more layers, and can be configured according to the kind of the film forming component.
The thickness of the film constituting the microcapsule is not particularly limited and can be adjusted according to the molecular size of the film-forming component, but is preferably 0.01 to 1.0 μm.

  The characteristics of the microcapsule can be adjusted according to the type of the film forming component constituting the microcapsule. For example, a microcapsule using a thermoplastic resin as the film forming component has a lower strength than a microcapsule using a thermosetting resin, and is pressure sensitive (easiness of disintegration when force is applied). Becomes higher.

  The microcapsule has a pressure sensitivity in which a force is applied, that is, when a force is applied to the adhesive layer, the film structure constituting the microcapsule is broken and easily collapses. In this way, the microcapsule suppresses exposure to the wall surface of the microbial growth inhibitor encapsulated before its collapse, so that it does not exhibit a microbial growth inhibitory effect, while on the other hand, after the collapse, the microcapsule suppresses microbial growth. By releasing the agent and exposing it to the wall surface, it exerts a microbial growth inhibitory action. And, since the microbial growth inhibitor is released to the outside in a short time in the whole amount or most of the amount due to the disintegration of the microcapsules, the above-mentioned adhesive sheet for wall surface has a sufficient amount of microbial growth when being applied to the wall surface. The inhibitor can be exposed on the wall surface in a short time, and has an immediate effect of immediately exhibiting a high microbial growth inhibitory action.

  In the present invention, the microcapsule has pressure sensitivity (is easily disintegrated when a force is applied), as described above, when the adhesive layer is adhered to the wall surface, the adhesive layer It means that the microcapsule is collapsed by applying a force associated with sticking to. The fact that the microcapsule has such pressure sensitivity means that the force (load) applied to the microcapsule necessary to disintegrate the microcapsule is 50 MPa or less. In the present invention, This force (load) is preferably 10 MPa or less from the viewpoint that the microcapsules are more easily disintegrated. Further, the force (load) applied to the microcapsule necessary for collapsing the microcapsule is preferably 0.5 MPa or more, and more preferably 0.6 MPa or more. When this force (load) is equal to or greater than the lower limit, the microcapsule has an appropriate strength and can be highly suppressed from collapsing by an operation other than sticking to the wall surface. In the present invention, “the microcapsule collapses” means that the membrane structure constituting the microcapsule is destroyed to the extent that the inclusion can be released to the outside.

The particle size of the microcapsule adjusts, for example, the degree of intense movement of the film-forming component and the raw material component constituting the film-forming component in the step of forming the microcapsule in the above-described microencapsulation method. It can be adjusted. For example, when forming a microcapsule using the reaction liquid containing the film forming component or the raw material component, the particle size of the microcapsule can be adjusted by adjusting the degree of stirring of the reaction liquid. Usually, the more the movement of the film-forming component or raw material component, the smaller the particle size of the microcapsules. And the smaller the particle size of the microcapsule, the more difficult it is to collapse.
Therefore, a microcapsule with high pressure sensitivity can be easily formed by adjusting the conditions so that the movement of the film forming component or the raw material component becomes intense at the stage of forming the microcapsule.

The average particle size of the microcapsules in the present invention is preferably 3 to 20 μm. The microcapsule has a more suitable degree of disintegration within the range having pressure sensitivity because the average particle size is not less than the lower limit, and the average particle size is not more than the upper limit. In the range having pressure sensitivity, it has a more suitable ease of disintegration.
In the present invention, “average particle diameter” means the value of the particle diameter (D ₅₀ ) at an integrated value of 50% in the particle size distribution curve obtained by the laser diffraction scattering method, unless otherwise specified. .

The said adhesive layer may contain the other component which does not correspond to these other than the said adhesive base material, microbial growth inhibitor, and a film formation component.
The other components are not particularly limited and may be appropriately selected depending on the purpose.
For example, the adhesive layer contains, as the other component, a microencapsulated microbial growth inhibitor having a sustained release property that gradually releases the microbial growth inhibitor to the outside of the microcapsule over time, In addition to exhibiting the above-mentioned immediate effect, the microorganism growth inhibitory action can be maintained for a long period of time. When using an adhesive sheet for a wall surface provided with such an adhesive layer, in the adhesive layer between the base sheet and the wall surface after being attached to the wall surface, from the above microcapsules having sustained release properties The concentration of the microbial growth inhibitor released to the outside is maintained for a long period of time enough to maintain the microbial growth inhibitory action in the adhesive sheet for wall surfaces.

As the microcapsules having sustained release that enclose the microbial growth inhibitor, for example, the same microcapsules having the immediate effect described above can be used except that the average particle size is further smaller. That is, the average particle size of the microcapsules having sustained release properties is preferably less than 3 μm.
What is necessary is just to select suitably the microorganism growth inhibitor included in the microcapsule which has sustained release from what was illustrated previously as the microorganism growth inhibitor included in the microcapsule which shows an immediate effect.

  Further, for example, the other component may be a water-soluble polymer used in a water-soluble polymer-containing layer to be described later. By using the water-soluble polymer, the microcapsule is more stable on the base sheet. Held.

  The content of the other component in the adhesive layer may be appropriately adjusted according to the type of the other component, and is not particularly limited. However, the total content of the adhesive base material, the microbial growth inhibitor and the film-forming component (hereinafter sometimes abbreviated as “essential components”) of the adhesive layer is (the total amount of the adhesive layer) 80% by mass or more, more preferably 90% by mass or more, and may be 100% by mass. When the content of the essential component is equal to or more than the lower limit value, the microbial growth inhibitory action of the wall surface adhesive sheet and the adhesive force of the adhesive layer are improved together.

The adhesive layer is made by adhering a composition for an adhesive layer containing components necessary for its formation, such as the adhesive base material, a microorganism growth inhibitor, and a film-forming component, on a base material sheet, and if necessary It can be formed by performing other treatments such as drying treatment and heat treatment. The heat treatment may also serve as a drying treatment. In the adhesive layer composition, the microorganism growth inhibitor and the film-forming component are usually present as microencapsulated microorganism growth inhibitors.
The ratio of the content of components that do not vaporize at room temperature in the composition for an adhesive layer is usually the same as the ratio of the content of the components of the adhesive layer. Here, “normal temperature” means a temperature that is not cooled or heated, that is, a normal temperature, for example, a temperature of 15 to 25 ° C. is suitable.

  The composition for an adhesive layer preferably contains a solvent in addition to the adhesive base material, the microorganism growth inhibitor, and the film-forming component from the viewpoint that the handleability is improved. When the adhesive base material is used as a liquid material such as an aqueous emulsion, or when a microbial growth inhibitor and a film-forming component (microencapsulated microbial growth inhibitor) are used as a liquid material such as an emulsion. The liquid medium used for the preparation of these liquids is also included in the “solvent” here.

The solvent is not particularly limited, but a solvent that can dissolve at least a part of the components other than the solvent and can be removed by drying is preferable.
The content of the solvent in the composition for the adhesive layer may be adjusted as appropriate so that the handleability of the composition is improved, and is not particularly limited.

The composition for an adhesive layer may contain, in addition to the adhesive base material, the microorganism growth inhibitor, the film forming component and the solvent, other components not corresponding to these.
The other components are the same as those described in the adhesive layer.
The content of the other components in the adhesive layer composition may be appropriately adjusted according to the type of the other components, and is not particularly limited.

  The contents of the adhesive base material, the microbial growth inhibitor and the film-forming component of the adhesive layer composition may be appropriately adjusted according to the content of these components in the adhesive layer. The ratio of the composition for the adhesive layer to the total content of components other than the solvent may be the same as the preferable content in the adhesive layer. For example, the ratio of the content of the adhesive base material to the total content of components other than the solvent of the composition for the adhesive layer is preferably 70% by mass or more, and more preferably 80% by mass or more. . And the ratio of the total content of the said adhesive base material, microbial growth inhibitor, and a film formation component (essential component) with respect to the total content of components other than the solvent of the composition for adhesive layers is 80 mass% or more. Preferably, it is 90% by mass or more, and may be 100% by mass.

The composition for an adhesive layer is obtained by blending the adhesive base material, the microorganism growth inhibitor and the film-forming component, and other components (the solvent and other components) as necessary.
At the time of blending each component, all the components may be added and then mixed, or some components may be mixed while being added sequentially, or all components may be mixed while being added sequentially. Good.
The mixing method is not particularly limited, a method of mixing by rotating a stirrer or a stirring blade; a method of mixing using a mixer, a three-roller, a kneader, a bead mill or the like; a method of mixing by adding ultrasonic waves, etc. What is necessary is just to select suitably from a well-known method.

When the composition for an adhesive layer is in a state where a part of the compounding components is dispersed without being dissolved, it is preferable that the components not dissolved are uniformly dispersed.
For example, when a composition for an adhesive layer in which a microencapsulated microbial growth inhibitor is dispersed with high uniformity is used, the microencapsulated microbial growth inhibitor is high even in the adhesive layer. In addition, the adhesive layer is uniformly dispersed, and such an adhesive layer is easy to form. This is because the microencapsulated microbial growth inhibitor can be easily dispersed in the adhesive layer composition. On the other hand, when a microbial growth inhibitor that is not microencapsulated is used as it is, it is usually difficult to disperse the microbial growth inhibitor in the adhesive layer composition. The higher the dispersibility of the microbial growth inhibitor in the adhesive layer, the smaller the variation in the microbial growth inhibitory effect of the wall surface adhesive sheet.

  In the composition for an adhesive layer, in order to disperse undissolved components with high uniformity, among the above-described mixing methods, for example, a method of dispersing using the above-described three rolls, kneader, bead mill or the like. It is preferable to apply.

The temperature at the time of blending is not particularly limited as long as each blending component does not deteriorate, but it is preferably 15 to 60 ° C.
Further, the blending time is not particularly limited as long as each blending component does not deteriorate, but it is preferably 5 minutes to 12 hours, and more preferably 10 minutes to 6 hours.

The composition for an adhesive layer can be attached onto the base sheet by a known method such as a printing method, a coating method, or a dipping method.
Examples of the printing method include screen printing method, flexographic printing method, offset printing method, dip printing method, ink jet printing method, dispenser printing method, jet dispenser printing method, gravure printing method, gravure offset printing method, pad printing. The law etc. can be illustrated.
Examples of the coating method include spin coaters, air knife coaters, curtain coaters, die coaters, blade coaters, roll coaters, gate roll coaters, bar coaters, rod coaters, gravure coaters, and other methods such as wire bars. It can be illustrated.

  The drying treatment and the heat treatment of the adhesive layer composition may be performed by any known method, for example, under normal pressure, reduced pressure, or blowing conditions, and may be performed in the atmosphere and in an inert gas atmosphere. You can do either of the following. The treatment temperature is not particularly limited, and may be set as appropriate according to the purpose.

The thickness of the adhesive layer usually needs to be larger than the particle size of the microcapsules. This is because when the microcapsules are exposed from the surface of the adhesive layer, the microcapsules are easily subjected to force from the contact object before the adhesive sheet for wall surface is attached to the wall surface, so that they easily collapse. It is because it ends up.
In order to easily avoid such collapse of the microcapsules, the thickness of the adhesive layer is usually preferably 4 to 100 μm, and more preferably 5 to 50 μm.
The thickness of the adhesive layer can be adjusted by adjusting the amount of the adhesive layer composition to be deposited on the base sheet or the blending amount of the non-volatile component in the adhesive layer composition.

  In the adhesive layer, the ratio of the average particle size of the microcapsules to the thickness of the adhesive layer ([average particle size of microcapsules (μm)] / [thickness of adhesive layer (μm)]) is usually large. Thus, the pressure sensitivity of the microcapsule is improved (the microcapsule is more easily disintegrated when a force is applied). From such a viewpoint, the ratio of the average particle diameter of the microcapsules to the thickness of the adhesive layer is preferably 0.1 or more, and more preferably 0.3 or more.

Further, in the adhesive layer, the higher the concentration of the microcapsules on the side opposite to the side in contact with the base sheet, that is, the side to be applied to the wall surface, the more when the adhesive sheet for wall surface is applied to the wall surface, The exposure amount of the microbial growth inhibitor on the wall increases. Therefore, an adhesive layer in which the distribution of the microcapsules is not uniform may be preferable.
As such a preferable adhesive layer, in the thickness direction of the adhesive layer, the region of 50% on the side of the application surface to the wall surface is more than the region of 50% on the side of the contact surface with the base sheet. One having a high concentration of microcapsules; one having a region where the concentration of microcapsules increases from the contact surface side to the wall surface with the base sheet (for example, in the thickness direction of the adhesive layer, Examples are those in which the concentration of the microcapsules increases as the surface approaches the affixing surface to the wall surface.

Such an adhesive layer with a non-uniform distribution of microcapsules is formed, for example, by forming one adhesive layer with the composition for an adhesive layer, and then the content of microcapsules (microbe growth inhibitor and film-forming component) In this case, a new adhesive layer is formed on the previously formed adhesive layer, and if necessary, on the adhesive layer as described above. It can be formed by repeating the process of forming a new adhesive layer one or more times. The step of forming a new adhesive layer on the adhesive layer may be performed in a state where the base adhesive layer is not completely dried.
In addition, such an adhesive layer in which the distribution of the microcapsules is not uniform is a laminated sheet having an adhesive layer on the release-treated surface of the release sheet, and two adhesive layers having different microcapsule contents are used. Prepare two or more seeds, and bond the adhesive layers of the two types of laminated sheets together. If necessary, peel off at least one of the release sheets, and adhere another laminated sheet to the exposed adhesive layer. It can also be formed by repeating the step of laminating the agent layer one or more times.

[Water-soluble polymer-containing layer]
The amount of the water-soluble polymer-containing layer laminated on the substrate varies depending on the amount of the microencapsulated microorganism growth inhibitor, but is preferably 1 to 100 g / m ² · dry, More preferably, it is 30 g / m ² · dry. When the amount of the water-soluble polymer-containing layer is greater than or equal to the lower limit value, the retention of the microbial growth inhibitor is further increased. Moreover, the excessive use of water-soluble polymer can be suppressed because the said lamination amount of a water-soluble polymer content layer is below the said upper limit.

(Water-soluble polymer)
The water-soluble polymer in the water-soluble polymer-containing layer is not particularly limited as long as the microcapsules can be held on the base material. Preferred examples include acrylic resin, polyvinyl alcohol (PVA), polyvinyl pyrrolidone ( PVP), ethylene-vinyl acetate copolymer resin (EVA resin), polyurethane, polyester, polyether, melamine resin, epoxy resin, phenol resin and the like can be exemplified, and acrylic resin and polyvinyl alcohol are more preferable.

  The water-soluble polymer contained in the water-soluble polymer-containing layer may be only one type, or two or more types, and in the case of two or more types, the combination and ratio can be arbitrarily set according to the purpose. .

The content of the water-soluble polymer in the water-soluble polymer-containing layer is not particularly limited as long as the microcapsules can be held on the base sheet, but (based on the total amount of the water-soluble polymer-containing layer). It is preferable that it is 70 mass% or more, and it is more preferable that it is 80 mass% or more. When the content of the water-soluble polymer is equal to or more than the lower limit value, the microcapsules are more stably held on the base sheet.
The upper limit of the content of the water-soluble polymer is not particularly limited, but is preferably 90% by mass, and by being in such a range, other than the holding power of the microcapsules of the water-soluble polymer-containing layer The characteristics are further improved.

(Microbial growth inhibitor, film-forming component)
The microbial growth inhibitor and the film-forming component in the water-soluble polymer-containing layer are the same as the microbial growth inhibitor and the film-forming component in the adhesive layer, and these components are both in the case of the adhesive layer. Similarly, it can be contained in the water-soluble polymer-containing layer. For example, the contents of the microbial growth inhibitor and the film-forming component in the water-soluble polymer-containing layer can both be the same as the contents of the microbial growth inhibitor and the film-forming component in the adhesive layer.

Moreover, the said water-soluble polymer content layer may contain the other component which does not correspond to these besides the said water-soluble polymer, microbial growth inhibitor, and a film formation component.
The other components are the same as the other components in the adhesive layer.
The content of the other component in the water-soluble polymer-containing layer may be appropriately adjusted according to the type of the other component, and is not particularly limited. However, the total content of the water-soluble polymer, the microorganism growth inhibitor and the film-forming component (essential component) in the water-soluble polymer-containing layer is 80% by mass or more (relative to the total amount of the water-soluble polymer-containing layer). It is preferable that it is 90 mass% or more, and 100 mass% may be sufficient. When the content of the essential component is equal to or more than the lower limit, the microbial growth inhibitory effect of the wall surface adhesive sheet and the retention of the water-soluble polymer are both improved.

The water-soluble polymer-containing layer adheres a composition for a water-soluble polymer-containing layer containing components necessary for its formation, such as the water-soluble polymer, a microbial growth inhibitor and a film-forming component, onto a substrate. And can be formed by performing other treatments such as a drying treatment and a heat treatment as necessary. The heat treatment may also serve as a drying treatment.
The ratio of the content of components that do not vaporize at room temperature in the composition for a water-soluble polymer-containing layer is usually the same as the ratio of the content of the components of the water-soluble polymer-containing layer.

  The composition for a water-soluble polymer-containing layer can be prepared by the same method as the above-described composition for an adhesive layer except that the water-soluble polymer is used instead of the adhesive base material. The water-soluble polymer-containing layer can be formed by the same method as that for the adhesive layer except that the water-soluble polymer-containing layer composition is used instead of the adhesive layer composition.

  The water-soluble polymer-containing layer can have the same configuration as the adhesive layer except for the difference from the adhesive layer described above.

When the microcapsule-containing layer is the adhesive layer, the wall-side adhesive sheet according to the present invention has the surface opposite to the side in contact with the base sheet of the microcapsule-containing layer facing the wall surface side. The microcapsule-containing layer is brought into contact with a predetermined portion of the wall surface. On the other hand, when the microcapsule-containing layer is the water-soluble polymer-containing layer, the additional adhesive layer is formed on the microcapsule-containing layer, and the additional adhesive layer is brought into contact with a predetermined portion of the wall surface. . Then, by applying force from the base sheet side, the wall surface adhesive sheet is attached to the wall surface via the microcapsule-containing layer.
The wall surface adhesive sheet can be attached to the wall surface by a known method such as a method using a roller.
The force applied to the adhesive sheet for wall surface at the time of sticking to the wall surface should just be a magnitude | size required for the said microcapsule to collapse.

FIG. 1 is a cross-sectional view schematically illustrating one embodiment of a wall surface adhesive sheet according to the present invention.
In the wall surface adhesive sheet 1 shown here, one main surface (surface) 11a of the base sheet 11 is a surface opposite to the surface to be adhered to the wall surface of the wall surface adhesive sheet 1. The wall surface adhesive sheet 1 includes a microcapsule-containing layer 12 on the other main surface (back surface) 11 b of the base material sheet 11. The microcapsule-containing layer 12 contains the microencapsulated microorganism growth inhibitor (microcapsule containing the microorganism growth inhibitor inside) 121 described above.

  In addition, the adhesive sheet 1 for wall surfaces shown here is on the other main surface (back surface) 12b on the opposite side to the one main surface (front surface) 12a with which the base material sheet 11 of the microcapsule containing layer 12 is in contact. A release sheet 19 is provided, which is a normal form before use of the wall surface adhesive sheet according to the present invention. When using the wall surface adhesive sheet 1, the release sheet 19 may be peeled off.

  The release sheet 19 may be a known one as long as the surface on the adhesive layer side of the paper or resin base material is subjected to a release treatment. The same applies to the release sheet used to form the microcapsule-containing layer in which the distribution of microcapsules is not uniform.

  When the microcapsule-containing layer 12 is an adhesive layer, the wall-surface adhesive sheet 1 peels the release sheet 19 and exposes the other main surface (back surface) 12b of the exposed adhesive layer (microcapsule-containing layer) 12. It is affixed to a wall surface via the adhesive bond layer 12 by making it contact the predetermined location of a wall surface and applying force from the base material sheet 11 side. And by applying force to the adhesive sheet 1 for wall surface from the base material sheet 11 side, force is applied to the adhesive layer 12 in the direction connecting the front surface 12a and the back surface 12b, so that the microcapsule 121 having pressure sensitivity. At the same time, the microbial growth inhibitor encapsulated is released. Then, after the released microbial growth inhibitor migrates inside the adhesive layer 12, it further migrates from the back surface 12b, which is the application surface to the wall surface of the adhesive layer 12, to the wall surface, and has a microbial growth inhibitory action. To express. Since all or most of the microcapsules 121 are collapsed when the wall surface adhesive sheet 1 is applied, the wall surface adhesive sheet 1 has an immediate effect on the microbial growth inhibitory action.

  On the other hand, when the microcapsule-containing layer 12 is a water-soluble polymer-containing layer, the adhesive sheet for wall surface 1 peels the release sheet 19 and exposes the other of the exposed water-soluble polymer-containing layer (microcapsule-containing layer) 12. The additional adhesive layer (not shown) is formed on the main surface (rear surface) 12b, the additional adhesive layer is brought into contact with a predetermined portion of the wall surface, and a force is applied from the base sheet 11 side to It sticks to a wall surface through the conductive polymer containing layer 12 and the additional adhesive layer. And by applying force to the adhesive sheet 1 for wall surface from the base material sheet 11 side, force is applied to the water-soluble polymer-containing layer 12 in the direction connecting the front surface 12a and the back surface 12b, so that it has pressure sensitivity. The microcapsule 121 collapses at the same time, and the microbial growth inhibitor contained therein is released. Then, the released microbial growth inhibitor moves inside the water-soluble polymer-containing layer 12 and the additional adhesive layer, and further moves to the wall surface, thereby exhibiting a microbial growth inhibitory action. Since all or most of the microcapsules 121 are collapsed when the wall surface adhesive sheet 1 is applied, the wall surface adhesive sheet 1 has an immediate effect on the microbial growth inhibitory action.

The additional adhesive layer is not particularly limited, and may be known in the field of adhesive sheets for wall surfaces such as wallpaper, and may be formed using a commonly used adhesive (composition for additional adhesive layer). The additional adhesive layer may be the same as the adhesive layer, for example, or the same as the adhesive layer except that it does not contain a microencapsulated microorganism growth inhibitor. It may be.
The thickness of the additional adhesive layer is not particularly limited, and may be appropriately selected in consideration of the material.

  So far, as the wall surface adhesive sheet according to the present invention, on the base material sheet, what is provided with only the microcapsule-containing layer in addition to the release sheet, the wall surface adhesive sheet according to the present invention, Furthermore, other layers may be provided.

  The other layer may be composed of a single layer or may be composed of two or more layers. When the other layer includes a plurality of layers, the plurality of layers may be the same as or different from each other. That is, all the layers may be the same, all the layers may be different, or only some of the layers may be different. And when several layers differ from each other, the combination of these several layers is not specifically limited. Here, the phrase “a plurality of layers are different from each other” means that one or more materials, thicknesses, and shapes of each layer are different from each other.

  The other layers are not particularly limited, but preferred examples include a resin layer and a printed layer.

  Examples of the resin layer include those provided on the surface of the base sheet opposite to the side provided with the microcapsule-containing layer. By providing such a resin layer, for example, when a microbial growth inhibitor is present in the microcapsule-containing layer of the adhesive sheet for a wall surface after being attached to a wall surface, the microbial growth inhibitor has permeated the base sheet. Then, it can suppress spreading | diffusion from the surface of a base material sheet to the exterior (construction space, for example, indoor space) of the adhesive sheet for wall surfaces. In this way, by suppressing the diffusion of the microbial growth inhibitor, the microbial growth inhibitory action is maintained for a long period of time at the location where the base sheet, the microcapsule-containing layer, and the wall surface adhesive sheet are attached.

Resin which comprises the said resin layer is not specifically limited, A well-known thing can be selected suitably.
Specific examples of the resin include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethylpentene (PMP), polycycloolefin, polystyrene (PS), poly Acrylic resins such as vinyl acetate (PVAc) and polymethyl methacrylate (PMMA), AS resin, ABS resin, polyamide (PA), polyimide, polyamideimide (PAI), polyacetal, polyethylene terephthalate (PET), polybutylene terephthalate (PBT) ), Polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), polyphenylene sulfide (PPS), polysulfone (PSF), polyethersulfone (PES) Polyetherketone (PEK), Polyetheretherketone (PEEK), Polycarbonate (PC), Polyurethane, Polyphenylene ether (PPE), Modified polyphenylene ether (m-PPE), Polyarylate, Epoxy resin, Melamine resin, Phenol resin, Urea Examples thereof include synthetic resins such as resins.

  The color of the resin layer is not particularly limited, and may be colorless or transparent, for example. The resin layer may contain an inorganic filler such as titanium oxide or calcium carbonate so as to have a concealing effect that hides the defects on the wall surface side.

  The thickness of the resin layer is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 10 to 1000 μm, and more preferably 50 to 600 μm.

The resin layer may be a foam obtained using a foaming agent in order to reduce the amount of resin used.
Moreover, the said resin layer may be a thing provided with the relief-like pattern by embossing by making it into a foam.

  When the resin layer is composed of a plurality of layers, it is preferable that the total thickness of each layer is the above-described preferable thickness of the resin layer.

  For example, the resin layer may be provided by being fused to the base sheet by heating, or may be provided on the base sheet using an adhesive. In the case where the adhesive is used, in this specification, in order to distinguish the layer composed of the adhesive from the above-described adhesive layer used for sticking to the wall surface of the adhesive sheet for wall surface, the second adhesive layer And the above-described adhesive layer used for fixing the wall surface adhesive sheet to the wall surface is referred to as a first adhesive layer.

The material of the second adhesive layer is not particularly limited and can be appropriately selected from known ones. For example, it is the same as the first adhesive layer except that it does not contain a microencapsulated microorganism growth inhibitor. It may be a thing.
The thickness of the second adhesive layer is not particularly limited, and may be appropriately selected in consideration of the material.

FIG. 2 is a cross-sectional view schematically illustrating an embodiment of the adhesive sheet for wall surface according to the present invention, which includes such a resin layer.
2 that are the same as those shown in FIG. 1 are assigned the same reference numerals as in FIG. 1, and detailed descriptions thereof are omitted. The same applies to the drawings after FIG.

  The wall surface adhesive sheet 2 shown here includes a resin layer 13 on one main surface (surface) 11a of the base sheet 11, and the other points are the same as those of the wall surface adhesive sheet 1 shown in FIG. Is. The wall surface adhesive sheet 2 further includes a resin layer 13 on the surface 11 a of the base sheet 11 of the wall surface adhesive sheet 1.

  Moreover, as described above, the wall surface adhesive sheet according to the present invention includes a printed layer on the surface opposite to the side having the microcapsule-containing layer of the base material sheet, and thus has excellent design properties. Become.

The thickness and pattern of the printing layer are not particularly limited and can be arbitrarily selected according to the purpose.
In addition, the print layer may have regions with different colors in one layer.

  The printed layer can be formed, for example, by attaching an ink composition containing components for constituting the printed layer onto the base sheet, and performing other treatments such as a drying treatment and a heat treatment as necessary. The heat treatment may also serve as a drying treatment. The said ink composition can be made to adhere on a base material sheet by the same method as the case of the above-mentioned composition for adhesive bond layers.

The adhesive sheet for wall surface according to the present invention is excellent in design by providing both the printed layer and the resin layer on the surface opposite to the side provided with the microcapsule-containing layer of the base material sheet, and further the resin. The effect of having the layer can also be expressed.
The resin layer in this case is a resin layer (for example, the resin shown in FIG. 2) in the above-described adhesive sheet for wall surfaces, which is provided with only the resin layer on the surface opposite to the side provided with the microcapsule-containing layer of the base sheet. Although the same thing as layer 13) may be sufficient, what is transparent is preferable so that a printed layer can be checked from the resin layer side.

FIG. 3 is a cross-sectional view schematically illustrating an embodiment of the adhesive sheet for wall surface according to the present invention, which includes such a print layer and a resin layer.
The wall surface adhesive sheet 3 shown here includes a printed layer 14 and a resin layer 13 in this order on one main surface (surface) 11a of the base sheet 11, and the wall surface shown in FIG. It is the same as the adhesive sheet 1 for use. The wall surface adhesive sheet 3 includes a printed layer 14 and a resin layer 13 on the surface 11 a of the base sheet 11 of the wall surface adhesive sheet 1.
In the wall surface adhesive sheet 3, the resin layer 13 is directly provided on the surface 11 a in an area where the printed layer 14 is not provided on the surface 11 a of the base sheet 11.

  In addition, in FIG. 3, although it has shown about what has the area | region where the printing layer 14 is not provided on the said surface 11a of the base material sheet 11 as the adhesive sheet 3 for wall surfaces, A printing layer 14 may be provided on the entire surface 11 a of the sheet 11.

  Further, in FIG. 3, the wall surface adhesive sheet 3 is shown as having the printed layer 14 and the resin layer 13 in this order on the base material sheet 11. The resin layer 13 and the printing layer 14 may be provided in this order. Unlike the case where the printed layer 14 and the resin layer 13 are provided on the base sheet 11 in this order, the resin layer in this case is preferably not transparent.

  The wall surface adhesive sheet 3 can be produced by forming the printing layer 14 and the resin layer 13 in this order on the base material sheet 11 of the wall surface adhesive sheet 1 by the above-described method.

So far, as the adhesive sheet for wall surface according to the present invention, the base sheet is mainly described as being composed of a single layer, but the adhesive sheet for wall surface according to the present invention is composed of a plurality of layers of the base sheet. Thus, a new function can be added.
As described above, the adhesive sheet for wall surface according to the present invention has an immediate effect that immediately exhibits a high microbial growth inhibitory action when applied to a wall surface, but has a particularly strong bactericidal property as a microbial growth inhibitor. This immediate effect can be further improved. However, some of these microbial growth inhibitors have an oxidizing (bleaching) action. In that case, when a material other than white is used as the base sheet, it may be decolored. Depending on the case, the base sheet may be deteriorated.
Therefore, the base sheet is composed of a plurality of layers, and a layer made of a material having oxidation resistance (not easily oxidized) is disposed on the microcapsule-containing layer side, so that at least the microcapsule-containing layer of the base sheet is used. In the outermost surface layer farthest away, the above-described alteration due to the action of the microbial growth inhibitor is suppressed.

FIG. 4 is a cross-sectional view schematically illustrating an embodiment of the adhesive sheet for wall surface according to the present invention, in which the base sheet is thus composed of a plurality of layers.
In the adhesive sheet 4 for wall surface shown here, as the base sheet 41, the first layer 411 and the second layer 412 are arranged in this order from the side opposite to the microcapsule containing layer 12 side (from the microcapsule containing layer 12 side to the second layer). 412 and the 1st layer 411 are laminated | stacked in this order), and except this point, it is the same as the adhesive sheet 1 for wall surfaces shown in FIG.
One main surface (front surface) 41 a of the base sheet 41 corresponds to the surface of the first layer 411, and the other main surface (back surface) 41 b of the base sheet 41 corresponds to the back surface of the second layer 412.

  The material of the 1st layer 411 among the base material sheets 41 can be arbitrarily selected from what was demonstrated previously as a material of a base material sheet. The material of the second layer 412 can be arbitrarily selected from those whose deterioration is suppressed (has oxidation resistance) according to the type of the microbial growth inhibitor.

  The wall surface adhesive sheet 4 can be manufactured by the same method as that for the wall surface adhesive sheet 1 except that the base sheet 41 is used instead of the base sheet 11. As the base material sheet 41, a commercial item may be used and what was manufactured by the well-known method may be used.

  In FIG. 4, although it has shown about what consists of two layers as a base material sheet, a base material sheet may consist of three or more layers. In that case, each layer of the base sheet consisting of n layers (n is an integer of 3 or more), the first layer, the second layer,... In order from the outermost layer side farthest from the microcapsule-containing layer 12. In the case of the n-th layer, one or more layers other than the first layer may be suppressed in deterioration (having oxidation resistance).

  The adhesive sheet for wall surface according to the present invention is not limited to those described so far, and within the range not impairing the effects of the present invention, a part of the configuration described so far has been changed or deleted. Further, another configuration may be added to what has been described so far. For example, even if it is the adhesive sheet for wall surfaces which has the structure provided with all the printing layers 14 and the resin layer 13 in the adhesive sheet 3 for wall surfaces shown in FIG. 3, and the base material sheet 41 in the adhesive sheet 4 for wall surfaces shown in FIG. Good.

  The present invention can be used as an adhesive sheet that enhances or protects the design of the wall surface of a building.

  1, 2, 3, 4 ... Adhesive sheet for wall surface, 11, 41 ... Base sheet, 411 ... First layer of base sheet, 412 ... Second layer of base sheet, 11a , 41a: one main surface (front surface) of the base sheet, 11b, 41b ... the other main surface (back surface) of the base sheet, 12 ... microcapsule-containing layer (adhesive layer, first Adhesive layer, water-soluble polymer-containing layer), 12a... One main surface (front surface) of the microcapsule-containing layer, 12b... The other main surface (back surface) of the microcapsule-containing layer, 121. Microencapsulated microorganism growth inhibitor (microcapsule), 13 ... resin layer, 14 ... printing layer, 19 ... release sheet

Claims (3)

A microcapsule-containing layer containing a microencapsulated microorganism growth inhibitor is provided on a substrate, and is a wall surface adhesive sheet for attaching the microcapsule-containing layer to a wall surface toward the wall surface side,
The adhesive sheet for wall surface, wherein the microcapsule is disintegrated by a force applied to the microcapsule-containing layer when the adhesive sheet for wall surface is attached to the wall surface.   2. The adhesive sheet for wall surface according to claim 1, wherein the microcapsule-containing layer further contains a water-soluble polymer.   The adhesive sheet for wall surfaces according to claim 1, wherein the microcapsule-containing layer further contains an adhesive base material.

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