JP2001011250A - Interior decorative material having moisture absorbing and releasing property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a decorative material having excellent staining resistance too by using a moisture absorbing and releasing resin layer made from a resin composition prepared by adding an inorganic porous substance and a water- repellent additive to a resin being an acrylic resin, a polyolefin resin, or a mixture thereof. SOLUTION: The moisture absorbing and releasing resin layer containing the inorganic porous substance can allow the decorative material to exhibit excellent moisture absorbing and releasing properties, while the added water- repellent material can allow the surface of the moisture absorbing and releasing layer to exhibit the ability to repel liquid water without detriment to the permeability of gaseous water, namely, moisture absorbing and releasing properties. Even if the decorative material is stained, its water repellency prevents the contaminants from penetrating into the resin layer and can facilitate the removal of them. The inorganic porous substance is desirably one having a mean particle diameter of about 0.1-100 μm and a mean pore diameter of 10-60 Å and is desirably activated clay. The water-repellent additive is exemplified by a silicone-type or fluororesin-type one.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior decorative material having moisture-absorbing / desorbing performance and contamination resistance used as an interior decorative material for buildings such as houses.

[0002]

2. Description of the Related Art Conventionally, as a decorative material for interior decoration of buildings such as wallpaper, a material obtained by forming a polyvinyl chloride resin layer on a base material such as paper has been used. However, since the cosmetic material of this configuration has poor moisture absorption and desorption properties, dew condensation occurs on the surface of the cosmetic material,
Molds, mites and the like are liable to occur, and fluctuations in humidity in the house may adversely affect human health. Furthermore, since this cosmetic material uses a polyvinyl chloride resin, chlorine-based gas is generated at the time of disposal and incineration, and there is also an environmental problem.

[0003] In order to solve this problem, an absorbent made of a non-vinyl chloride resin composition such as an acrylic resin or an ethylene-vinyl acetate copolymer containing a moisture absorbing / releasing material such as activated clay on a base material. A decorative material having a moisture-releasing resin layer formed thereon has been experimentally produced (see Japanese Patent Application Laid-Open Nos. 54-144421 and 11-5862).

[0004] This decorative material has excellent moisture absorption and desorption properties and is less likely to cause environmental pollution using a non-vinyl chloride resin. However, in the case of the decorative material having such a configuration, since the formed moisture-absorbing / desorbing resin layer has high moisture permeability, there is a problem that the dirt easily penetrates into the interior of the decorative material and the dirt is difficult to wipe off.

[0005]

Therefore, in order to improve the stain resistance, there has been developed a decorative material having a moisture-absorbing and desorbing resin layer provided with a stain-resistant surface protective layer made of a two-component curable urethane resin on the surface thereof. it was thought. However, although this has excellent contamination resistance performance, since a coating film is formed on a resin layer having moisture absorption / release performance, water vapor to the moisture absorption / release material present in the moisture absorption / release resin layer is present. , And sufficient moisture absorption / release performance could not be obtained.

The present invention has been made in view of such circumstances, and has as its object to provide a moisture-absorbing and releasing interior decorative material provided with excellent contamination resistance without lowering the moisture-absorbing and releasing performance. I do.

[0007]

In order to solve the above-mentioned problems, the present invention provides an inorganic porous material and a water-repellent additive in one or a mixture of two or more of an acrylic resin and a polyolefin resin. The present invention provides a moisture absorbing / releasing interior decorative material having a moisture absorbing / releasing resin layer made of a resin composition containing an agent.

In the moisture absorbing and releasing interior decorative material of the present invention, the moisture absorbing and releasing resin layer is preferably laminated on a base material layer.

The moisture absorbing and releasing interior decorative material of the present invention is characterized in that an inorganic porous substance and a water-repellent additive are added to the moisture absorbing and releasing resin layer. That is, by adding an inorganic porous substance to the moisture absorbing / releasing resin layer, the interior decorative material is imparted with excellent moisture absorbing / releasing performance, and by further adding a water repellent additive, the absorption of the interior decorative material is improved. Water (vapor) in a gaseous state can impart water repellency to water in a liquid state without impairing permeability, that is, moisture absorption / desorption performance, on the surface of the moisture-releasing resin layer.

[0010] In the interior decorative material of the present invention, water repellency is imparted to the moisture absorbing / releasing resin layer, so that even if dirt adheres to the surface of the interior decorative material (surface of the moisture absorbing / releasing resin layer), contaminants are removed. Penetration into the moisture-absorbing / desorbing resin layer is suppressed, and removal of attached dirt is easy. Therefore, the interior decorative material of the present invention has excellent moisture absorption / release performance and stain resistance.

Further, in the interior decorative material of the present invention, paper,
When a water-permeable sheet-like base material such as a nonwoven fabric is used in the form of a wallpaper, in order to actually apply the interior decoration material, water is applied to the back surface (the base material layer side) of the interior decoration material. Is applied as a diluting solvent or a dispersion medium (forming an adhesive layer), cured for a certain period of time, and then adhered to the adherend surface.
In this case, in the interior decorative material of the present invention, since the moisture-absorbing / releasing resin layer is provided with water repellency, the movement of water as a liquid from the adhesive layer side to the moisture-absorbing / releasing resin layer side is suppressed. Therefore, a sufficient time (open time) for curing the applied adhesive can be secured, and the work efficiency of the interior decorative material can be improved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the interior decorative material of the present invention will be described in detail. The interior decorative material (1A) of the present invention basically comprises, as shown in FIG. 1 (a), an inorganic porous substance 1a as a moisture absorbing and releasing material and a water repellent additive 1b in a resin 1c.
Moisture absorbing / releasing resin layer 1 formed from a resin composition containing
Consists of

The inorganic porous material 1a to be added to the moisture-absorbing and desorbing resin layer 1 can be used without any particular limitation as long as it is an inorganic porous material having a moisture-absorbing and desorbing property. As such an inorganic porous material, for example,
Activated clay (montmorillonite), acid clay, sepiolite, diatomaceous earth, tobermorite, zeolite, silicate minerals such as silica gel, or scallop shell particles (powder).

The inorganic porous material 1a is preferably used because it has a reproducibility of a cycle of moisture absorption and desorption, no swelling due to moisture absorption, and an antifungal property. Among them, activated clay which is excellent in moisture absorption / desorption performance and dispersibility in a resin, and has good film forming and coating suitability of a resin composition added to the resin is more preferable.

Activated clay is clay that has been acid-treated to enhance its activity. Normally, natural acid clay or clay similar thereto is dried at room temperature to form a powder, which is heated at a temperature of 90 ° C. or more under normal pressure or pressure with an appropriate amount of an acid such as sulfuric acid. After that, what was separated by filtration, washed and dried at 120 to 200 ° C. is used. Activated clay has high moisture absorption / desorption performance due to its strong adsorption characteristics and the distribution of porous pore sizes.

Activated clay is a powerful moisture absorbing and releasing agent, does not dissolve in water or swells with water, and does not deteriorate or mold when exposed to air for a long time. And moisture can be repeated.

It is preferable that the inorganic porous material 1a is used in the form of fine particles in a state of being uniformly dispersed without causing separation and sedimentation in the resin. By containing the particles in the form of fine particles, as described later, a part of the fine particles is extruded from the inside of the resin layer to the resin surface when the film is formed, and the surface density of the particles exposed on the resin surface increases. In addition, due to the shear stress between the particles and the surrounding resin, the moisture-absorbing / releasing resin layer is made porous, and the particles inside the moisture-absorbing / releasing resin layer also circulate with the outside air. Will be used.

The average particle diameter of the particulate inorganic porous material 1a is preferably about 0.1 to 100 μm. The average pore size is 10 to 6 in the sense that the humidity is kept at 40 to 60%.
0 °, preferably about 20 to 30 °, is good in terms of the moisture absorption / release effect.

The amount of the inorganic porous material 1a added to the resin 1c is preferably about 50 to 150 parts by weight based on 100 parts by weight of the resin (binder). When the amount is less than 50 parts by weight, the moisture absorption / release performance is not sufficiently exhibited. On the other hand, 15
When added in an amount of 0 parts by weight or more, the composition becomes thicker when coating and forming a film by adding a moisture-absorbing / desorbing material to the aqueous dispersion emulsion, and the coating aptitude decreases. Further, the strength of the moisture-absorbing / releasing resin layer obtained as a coating film is reduced and the resin layer becomes brittle.

From the results of the light resistance test and the heat resistance test (a test for accelerating the influence of sunlight entering through a window), when an acidic inorganic porous material such as activated clay is dispersed in a resin,
It is known that the dispersed resin causes yellowing and the like. Therefore, in the present invention, in order to avoid such a problem, by adjusting the pH by blending an alkaline additive together with an acidic inorganic porous substance in the resin, the occurrence of the yellowing or the like is suppressed. Is preferred.

Examples of such alkaline additives include ammonia (aqueous ammonia), hydroxides such as sodium hydroxide and potassium hydroxide, carbonates such as sodium carbonate and potassium carbonate, and hydrogen carbonate such as sodium hydrogen carbonate and potassium hydrogen carbonate. Salts and the like can be mentioned. The amount of the alkaline additive to be added is, for example, about 10% by weight or more, preferably about 20% by weight of activated clay in the case of aqueous ammonia (28% by weight).

In addition, as the moisture absorbing / releasing resin layer 1 of the interior decorative material of the present invention, an organic moisture absorbing / releasing material such as a saponified product of a graft copolymer of starch and acrylonitrile or a crosslinked polyvinyl alcohol is used. It can also be added.

As the water-repellent additive 1b added to the moisture-absorbing and releasing resin layer 1 of the interior decorative material of the present invention, a silicone-based or fluororesin-based water-repellent additive can be used.

As the silicone-based water repellent additive, for example, a siloxane chain [—Si
(R ¹ , R ² ) -O-Si (R ¹ , R ² ) -O- (wherein R ¹ and R ² each independently represent a hydrogen atom or an alkyl group)], or Silane chain [-Si
(R ³ , R ⁴ ) —Si (R ³ , R ⁴ ) — (where R ³ ,
R ⁴ each independently represents a hydrogen atom or an alkyl group. )], A silicone resin, or the like. When the moisture absorbing / releasing resin layer is formed from a resin emulsion, it is preferable to use a silicone resin emulsion.

As the fluorine resin-based water repellent additive, for example, there is an organic resin containing a fluorine atom in a raw material monomer. For example, fluorine resins such as polytetrafluoroethylene, tetrafluoride-perfluoroalkoxyethylene copolymer (PFA resin), poly (ethylene trifluoride), polyvinylidene fluoride, polyvinyl fluoride, and fluororubber; Surfactants can be used. Among these, it is preferable to use a fluororesin-based additive from the viewpoint of water repellency.

The mixing amount of the water repellent additive 1b in the resin is as follows:
When printing on the surface of the moisture-absorbing / releasing resin layer 1, it is preferable to add it to such an extent that printability is not reduced. The amount of the water-repellent additive 1b generally depends on the resin content (binder).
It is about 0.1 to 10 parts by weight based on 100 parts by weight.

In the interior decorative material of the present invention, the resin 1c constituting the moisture-absorbing and releasing resin layer 1 is a resin capable of holding the inorganic porous substance 1a and the water-repellent additive 1b and capable of forming a layer. If there is no limitation, in particular, in terms of ease of compatibility with these additives, moldability, workability, etc.,
It is preferable to use an acrylic resin or a polyolefin resin which is a non-vinyl chloride resin.

As the polyolefin resin, for example,
Ethylene-based unsaturated monomers such as ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-vinyl alcohol copolymer and other polymerizable monomers And terpolymers such as polyethylene, polypropylene, polybutene, and homopolymers consisting solely of ethylenically unsaturated monomers such as polymethylpentene, for example, ethylene-propylene copolymers and ethylene- Copolymers of ethylenically unsaturated monomers such as propylene-butene copolymer can be exemplified.

The acrylic resin is mainly obtained by polymerizing acrylic acid (including methacrylic acid) and its derivatives, acrylamide and acrylonitrile, and other monomers such as other acrylates, ethylene and styrene. And a copolymer resin.

Examples of the acrylic resin include poly (meth) acrylate, poly (ethyl) acrylate, poly (butyl) acrylate, and methyl (meth) acrylate-butyl (meth) acrylate. Coalescing,
Methyl (meth) acrylate-2-hydroxyethyl (meth) acrylate copolymer, methyl (meth) acrylate-
(Meth) such as butyl (meth) acrylate-2-hydroxyethyl (meth) acrylate-styrene copolymer, ethylene-methyl (meth) acrylate copolymer, and styrene-methyl (meth) acrylate copolymer Those composed of a homo- or copolymer containing an acrylate ester may be mentioned.
Here, (meth) acrylic acid is used in the meaning of acrylic acid and methacrylic acid. Among them, those having a glass transition temperature of 15 to 60 ° C are preferable.

Of these resins, the resin itself has a certain degree of moisture absorption / release properties, is well compatible with moisture absorption / release materials, and has good dispersibility of the inorganic porous substance and the water repellent additive. It is particularly preferable to use an ethylene-vinyl acetate copolymer or a saponified product thereof for the reason that the amount of these additives can be increased.

In the present invention, as the resin 1c, one of these acrylic resin and polyolefin resin is used.
Mixed resin composed of two or more kinds, for example, ethylene-
A mixed resin of a vinyl acetate copolymer and an acrylic resin can also be used.

The resin 1c contains an inorganic porous material 1
a, a water-repellent additive 1b and, if desired, an alkaline additive. If necessary, a flame retardant such as magnesium hydroxide or aluminum hydroxide, 10, 10'-
Antifungal agents such as oxybisphenoxyarsine, antibacterial agents such as zeolite carrying silver ions, formaldehyde scavengers such as organic amino compounds, calcium carbonate, calcium silicate,
Extender such as barium sulfate, bis- (2,2,6,6-
Light stabilizers such as hindered amine radical scavengers such as tetramethyl-4-piperidinyl) sebacate, radical scavengers such as piperidine radical scavengers, antioxidants such as alkylphenols, amines and quinones, benzophenones and salicylates System, benzotriazole system,
Various ultraviolet absorbers such as acrylonitrile-based, dispersants such as silicon-based or non-silicon-based defoamers and polycarboxylic acids, coloring pigments such as titanium white, carbon black, and phthalocyanine blue, heat stabilizers, and plasticizers, as described below. A blowing agent can be added.

When a foaming agent is added, a resin having a large number of cavities in the moisture-absorbing / desorbing resin layer is obtained, and the air permeability is good, and thus the moisture absorbing / desorbing property is also good. For example, FIG.
As shown in (b), the hygroscopic resin layer 1 can be formed on the substrate 2 with the cellular foam 1d having many bubbles inside.

As the foaming agent, for example, those listed in the following (1) to (3) can be used.

(1) polyvinyl chloride resin, polyvinylidene chloride resin, acrylonitrile-vinyl chloride copolymer,
A microcapsule-type foaming agent containing a volatile, heat-expandable substance such as butane, hexane, and pentane in a hollow body of a resin such as a vinylidene chloride-acrylonitrile copolymer,
(2) azodicarbonamide, azobisisobutyronitrile, 4,4′-oxybisbenzenesulfonylhydrazide, N, N-dinitrosopentamethylenetetramine,
Pyrolytic foaming agents such as sodium bicarbonate, ammonium carbonate, sodium borohydride, and, if necessary, metal soaps such as lead, zinc, calcium, and tin, dibasic lead sulfate, tribasic (3) A mixture of (1) and (2) above, to which a foaming accelerator such as lead or zinc white is added.

The amount of the foaming agent to be added is usually preferably about 1 to 10 parts by weight based on 100 parts by weight of the resin. If the addition is less than 1 part by weight, the effect of adding a foaming agent is poor.
If the amount exceeds 10 parts by weight, the voids in the resin layer become too large, and the resulting moisture-absorbing and releasing resin layer 1 has a reduced strength and is brittle.

Further, the interior decorative material (1B) of the present invention has a moisture absorbing / releasing resin layer 1 laminated on a base material layer 2 as shown in FIGS. 1 (b) and 1 (c). preferable.

The base material 2 serves as a support when the interior decorative material is manufactured. The shape of the substrate 2 may be a sheet shape or a plate shape. Cedar, cypress, zelkova, oak,
Wood veneer, wood plywood, particle board, medium density fiberboard (M
DF) and other wood fiber boards, such as wood fiber boards, iron, iron alloys, copper, copper alloys, metals such as aluminum, acrylic resin, polycarbonate, ethylene-vinyl acetate copolymer, ethylene vinyl acetate, polyester resin, polystyrene, and polyolefin Non-cement ceramics such as resin, ABS resin, phenolic resin, polyvinyl chloride, cellulose resin, rubber and other resins, various glasses, ceramics such as ceramics, cement such as ALC (foamed lightweight concrete), calcium silicate, gypsum Materials include papers such as materials, high-quality paper, Japanese paper, and base paper for wallpaper, and nonwoven fabrics and woven fabrics made of fibers such as carbon, asbestos, potassium titanate, glass, and synthetic resins. Further, the base material may be made of these laminates, and may be colored with a coloring agent.

When the interior decorative material is used as a sheet (decorative sheet) for wallpaper or the like, as the base material 2, high-quality paper having a basis weight of about ²⁰ to 120 g / m ² , thin paper, backing paper for wallpaper, Japanese paper It is preferable to use a woven or nonwoven fabric made of paper such as glass fiber, asbestos, polyester fiber, and vinylon fiber. In the case of paper, a flame retardant such as aluminum hydroxide powder may be added.

When a material having a moisture absorbing / releasing property or a water permeable property such as paper, woven fabric, nonwoven fabric, wood, etc. is used as the substrate 2, the moisture adsorbed on the moisture absorbing / releasing resin layer 1 is used as the substrate 2 And may penetrate into the back side (for example, inside the wall).

Therefore, in order to prevent this phenomenon, for example, as shown in FIG. 2D, the back surface of the base material 2 or the surface of the base material 2 (on the moisture absorbing / desorbing resin layer 1 side) or both the front and back surfaces is applied. It is also preferable to form a moisture-proof / water-proof layer 3 of polyethylene, polyvinylidene chloride, silica-deposited polyethylene terephthalate, or the like.

The thickness of the moisture / waterproof layer 3 is usually 30 to 10
A thickness of about 0 μm is sufficient, and the substrate 2 is bonded to the front, back, front and back surfaces with an adhesive such as a two-component curable urethane resin, or is applied by a melt extrusion method (extrusion coating method) or the like. Can be formed by

In the interior decorative material of the present invention, for example, as shown in FIG. 2 (e), the surface of the moisture-absorbing / desorbing resin layer 1 (if the moisture-absorbing / desorbing resin layer is not hindered). The decorative layer 4 can also be formed on the back surface if 1 is transparent. The decorative layer 4 is provided to improve the decorativeness of the interior decorative material.

As a method of forming the decorative layer 4, for example, the moisture absorbing / releasing resin layer 1 itself is colored by adding a pigment,
One method such as a method of providing a picture on the base material 2 or the moisture absorbing / desorbing resin layer 1 by printing or the like, or a combination of two or more thereof can be used. When the decorative layer 4 does not have moisture permeability, it is necessary to form the decorative layer 4 partially, not on the entire surface of the moisture-absorbing and releasing resin layer 1.

As the pattern printing, a pattern can be formed with ink (or paint) by using a known printing method such as gravure printing, offset printing, silk screen printing, and transfer printing from a transfer sheet.

The patterns include a wood grain pattern, a stone grain pattern, a cloth grain pattern, a leather pattern, a geometric pattern, a character symbol, and a solid pattern on the entire surface.

As the ink or paint, a binder,
Colorants such as pigments and dyes, and, if necessary, those obtained by appropriately mixing an extender, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent, and the like can be used. As a binder,
For example, a vinyl chloride-vinyl acetate copolymer, an acrylic resin, a urethane resin, a chlorinated polyolefin, or a mixture thereof can be used. When mixing both acrylic resin and vinyl chloride-vinyl acetate copolymer,
Acrylic resin / vinyl chloride-vinyl acetate copolymer = 1 /
A range from 9 to 9/1 is preferred.

Examples of the coloring agent include inorganic pigments such as titanium white, carbon black, nickel titanium yellow, red iron oxide, ultramarine, quinacridone red, isoindolinone, and the like.
Organic pigments such as phthalocyanine blue, and pearl pigments composed of titanium dioxide-coated mica foil powder.

In addition, embossing of an uneven pattern on the surface,
Further, the embossed concave portions may be filled with a coloring ink by a wiping method and colored.

The interior decorative material of the present invention comprises an inorganic porous material 1a and a water-repellent additive 1b, and optionally other additives such as an alkaline additive and a dispersant, in a resin 1c made of an acrylic resin and / or a polyolefin resin. A resin composition is prepared by blending the additives in a predetermined ratio, and then the resin composition is coated on a substrate 2 and dried and heated to form a moisture-absorbing and releasing resin layer 1. can do.

In order to laminate the moisture absorbing / releasing resin layer 1 on the substrate 2, more specifically, using a coating machine such as a roll coater, a comma coater or a curtain floater, the resin composition (organic solvent solution, The melt is used in the form of a heated melt or an aqueous dispersion emulsion).
m at a thickness of 120 to 200 ° C.
It is solidified by heating and drying for 2 to 1 hour,
By forming the moisture absorbing / releasing resin layer 1.

When a foaming agent is added to the resin composition, the resin composition is coated on the base material 2 and solidified by heating and drying, followed by heating and foaming. Thus, the moisture absorbing / releasing resin layer 1 made of a foam can be obtained.

When the interior decorative material of the present invention is manufactured as the moisture-absorbing and releasing resin sheet 1A comprising only the moisture-absorbing and releasing resin layer 1, the support sheet 5 is used. That is, as shown in FIG. 3A, the hygroscopic resin layer 1 is formed on the support sheet 5 in the same manner as when the hygroscopic resin layer 1 is laminated on the base material 2. Thereafter, as shown in FIG. 3B, the support sheet 5 is peeled off from the moisture-absorbing and releasing resin layer 1 to obtain a moisture-absorbing and releasing resin sheet (1A) composed of only the moisture-absorbing and releasing resin layer 1. Can be.

The support sheet 5 is not particularly limited as long as it has releasability from the moisture-absorbing and releasing resin sheet (1A). For example, among the substrates listed above, a substrate having releasability can be used.

The above resin composition can be applied on the substrate 2 or the support sheet 5 in the form of an organic solvent solution, a heated melt, or the like. It is preferably used in the form of a dispersed emulsion. For example,
In an aqueous dispersion emulsion of a mixed resin comprising one or more of a polyolefin resin and an acrylic resin, an inorganic porous material, a water-repellent additive and, if desired, an alkaline additive are blended in a predetermined ratio. It is preferable to adjust the pH of the obtained resin emulsion, and thereafter apply it to the base material 2 or the support sheet 5.

It is preferable that the pH of the resin emulsion is in an apparently alkaline range. This is because an acidic inorganic porous substance such as activated clay is uniformly dispersed without dissolving in the resin emulsion, and thus it is difficult to completely neutralize the inside of the emulsion system. Further, it is more preferable to set the pH value to about 8 to 11 in consideration of worker's safety.

The interior decorative material of the present invention obtained as described above can be used by attaching it to another adherend surface. For example, as shown in FIG. 4, a suitable adhesive is applied to the back surface (substrate 2 side) of the interior decorative material (1B) of the present invention to form an adhesive layer 6, and the adhesive layer 6 can be adhered to the adherend 7 surface.

Examples of the adhesive that can be used include urea-based, melamine-based, resorcinol-based, phenol-based adhesives.
Adhesives composed of thermosetting resins such as epoxy and polyester adhesives, adhesives composed of thermoplastic resins such as vinyl acetate, polyvinyl alcohol, acrylic and polyethylene adhesives, and natural adhesives such as starch And the like. As the adhesive, any of a water-dispersed emulsion type and a solvent type can be used, but the use of a non-formaldehyde type is preferable in terms of environmental health.

The interior cosmetic composition of the present invention may be used in a case where the adherend is a final product and is sometimes laminated for surface makeup.
If necessary, an adherend may be laminated on the back surface of the decorative material to reinforce the mechanical strength of the interior decorative material or to impart concealment.

There are various materials as such adherends. Examples of the shape include a plate material such as a flat plate and a curved plate, a three-dimensional article, a sheet (or film), and the like. Materials used for any of these shapes include cedar, oak, lauan,
Wood material such as wood veneer, wood plywood, particle board, medium density fiberboard (MDF) consisting of various tree species such as teak,
Iron, metals such as aluminum, acrylic resin, polycarbonate, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, polyester, polystyrene, olefin resin, ABS resin, phenol resin,
Resins such as polyvinyl chloride, cellulosic resin, rubber, etc., materials exclusively used as plate materials or three-dimensional articles include glass, ceramics such as ceramics, cement such as ALC (foamed lightweight concrete), calcium silicate, gypsum, etc. Non-cement ceramic materials, materials used exclusively as sheets (or films) include high-quality paper, paper such as Japanese paper, or carbon, asbestos, potassium titanate, glass,
There is a nonwoven fabric or a woven fabric made of a fiber such as a synthetic resin.

The decorative material of the present invention includes, for example, building interiors such as walls, floors and ceilings, buildings such as doors, handrails, door frames and window frames, furniture such as chests of drawers, vehicle interiors such as automobiles and trains, It can be suitably used as an interior decorative material for a surface of an aircraft or a ship, which is required to have a moisture absorbing / releasing function and a stain resistance, such as an interior, a partition, and a container.

[0063]

The present invention will be described in more detail with reference to the following examples. The following examples are merely examples of the embodiments of the present invention, and without departing from the spirit of the present invention, the types of the moisture-absorbing and desorbing materials, the types of the resin of the moisture-absorbing and desorbing resin layer, the types of the base material, The design of the layer configuration, the thickness of each layer, the presence or absence of a picture layer, and the like can be appropriately changed.

Example 1 Activated clay (average particle size: 20 μm, average pore size: 25 °) (manufactured by Mizusawa Chemical Co., Ltd., trade name: Galeon Earth V2R) 11a
28 parts by weight of a fluororesin-based water-repellent additive (manufactured by Dainippon Ink and Chemicals, Inc., trade name: Dickguard F-9)
0N) 11b was dispersed in 47.5 parts by weight of an aqueous emulsion (11c) having the following composition [A].
Substrate 30 g / m ² of the backing sheet (Tokushuseishi Co.) 1
2 was coated at a thickness of 170 μm, and heated at 120 ° C. for 1 minute to solidify the aqueous resin emulsion layer (coated layer) to form a moisture-absorbing and releasing resin layer 11. Thereafter, the moisture absorbing / releasing resin layer 11 is heated at 170 ° C. for about 1 minute to complete the foaming of the aqueous resin emulsion layer, and the interior decorative material (wall material) of Example 1 as shown in FIG. Sheet) 11A was obtained.

[A] Resin binder: ethylene-vinyl acetate copolymer: 42 parts by weight (manufactured by Chuo Rikagaku Kogyo KK, product number: BE-920) Blowing agent: microcapsule type blowing agent: 3.5 parts by weight (Matsumoto Yushi Co., Ltd., product number: F-85) Dispersant: 1 part by weight of polycarboxylic acid Defoaming agent: 1 part by weight of non-silicon-based defoaming agent 47.5 parts by weight in total

Comparative Example 1 28 of activated clay (Galeon Earth V2R, manufactured by Mizusawa Chemical Co., Ltd.) having an average particle diameter of 20 μm and an average pore diameter of 25 °
Parts by weight were dispersed in 47.5 parts by weight of an aqueous emulsion of the above-mentioned composition [A] (however, no water-repellent additive was added), and this was dispersed in a backing paper having a basis weight of 130 g / m ² (special paper making )) Was coated with a thickness of 170 μm. Then, the aqueous resin emulsion layer (coated layer) was solidified by heating at 120 ° C. for 1 minute. afterwards,
By heating at 170 ° C. for about 2 minutes, foaming of the aqueous resin emulsion layer is completed to form a moisture absorbing / releasing resin layer, and the same layer structure as shown in FIG. (No agent added) to obtain an interior decorative material (wall material sheet) 11B of Comparative Example 1.

Comparative Example 2 Activated clay (Galleon Earth V2R, manufactured by Mizusawa Chemical Co., Ltd.) 11a having an average particle diameter of 20 μm and an average pore diameter of 25 ° C.
Of an aqueous emulsion (1) of the above composition [A]
1c) Dispersed in 47.5 parts by weight (however, no water repellent additive was added), and this was dispersed on a substrate 12 of a backing paper (manufactured by Tokushu Paper Co., Ltd.) having a basis weight of 130 g / m ^2. , 170 μm thick. Then, the aqueous resin emulsion layer (coated layer) was solidified by heating at 120 ° C. for 1 minute. Thereafter, a surface protective layer of a transparent acrylic resin is applied to the surface of the solidified aqueous resin emulsion layer at a thickness of 3 μm (when dried), and then heated at 170 ° C. for about 1 minute to complete foaming of the aqueous resin emulsion layer. Let me
The moisture absorbing / releasing resin layer 11 was formed to obtain an interior decorative sheet (wall material sheet) 11C of Comparative Example 2 as shown in FIG. 5B.

Humidity control effect test Wallpaper sheet 1 produced in Example 1 and Comparative Examples 1 and 2
Using 1A, 11B and 11C, a humidity control effect test was performed by the following method.

That is, the inner dimensions 25 cm × 25 cm × 25 cm
Each of the wallpaper sheets of Examples and Comparative Examples 1 and 2 was cut into a size of 25 cm × 25 cm on the inner wall surface of the aluminum case, and each sheet was stuck to the inner wall surface of the aluminum case, and the initial set temperature was 20 ° C. and 50% After constant weight to RH, the aluminum case is closed and the outside air temperature is 20 ° C.
For 0.5 hour, 30 ° C. for 2 hours, 20 ° C. for 2 hours, and 10 ° C. for 2 hours, and the humidity change in the aluminum case was measured. FIG. 6 shows the results. In the figure, the horizontal axis represents elapsed time (min), and the vertical axis represents humidity (% RH).
, And the results of the cosmetic material of Example 1, the cosmetic material of Comparative Example 1, and the cosmetic material of Comparative Example 2 are shown.

From the measurement results, the wallpaper sheet of Example 1 was
The moisture absorption / release performance was equivalent to that of the decorative sheet of Comparative Example 1 without the surface protective layer. That is, in the decorative sheets of Example 1 and Comparative Example 1, the fluctuation range of the humidity is converged as compared with the decorative sheet of Comparative Example 2 having the surface protective layer 13, and these wallpaper sheets (1A, 1B) It was found to have excellent moisture absorption / desorption performance.

Soil resistance evaluation test Wallpaper sheets 1A produced in Example 1 and Comparative Examples 1 and 2,
The contaminants shown in Table 1 below were dropped on the surfaces of 1B and 1C (the surface opposite to the substrate), and after 24 hours, JK
Wiper (Crecia Co., Ltd., product number: 150-S)
A wiping test was performed. The results are shown in Table 1 below.
In Table 1, when no trace of dirt is found by wiping with water, ○, dirt is not removed by wiping with water, but after gently wiping with a synthetic detergent stock solution, wiping with water and then wiping with dry cloth When the mark disappeared, the evaluation result was indicated by Δ, and when the trace of the dirt still remained, the evaluation result was indicated by X.

[0072]

[Table 1]

As a result, it was found that the wallpaper sheet of Example 1 had better antifouling performance than the wallpaper sheets of Comparative Examples 1 and 2.

Open time test during construction curing Wallpaper sheet 1 prepared in Example 1 and Comparative Examples 1 and 2
Using 1A, 11B and 11C, an adhesive 14 composed of an aqueous dispersion of vinyl acetate was applied at a rate of 120 g / m ² to the base material surface of these wallpaper sheets (FIG. 7).
(A)) The bonding surfaces were brought into close contact with each other as shown in FIG. Thereafter, the adhesive surface was peeled off (FIG. 7).
(C)) The presence or absence of delamination between the base material 12 and the hygroscopic resin layer 11 and between the paper sheets as the base material was visually checked. The results are shown in Table 2 below.

[0075]

[Table 2]

Although no peeling occurred in the wallpaper sheet 11A of Example 1, the wallpaper sheets 11B, 1B of Comparative Examples 1 and 2 did not peel.
At 1C, peeling occurred. Therefore, in the wallpaper sheet 1A of Example 1, it was found that a sufficient time (open time) for curing the adhesive 14 could be secured.

[0077]

As described above, the interior decorative material of the present invention is an interior decorative material having excellent contamination resistance in addition to excellent moisture absorption / release performance. That is, by adding an inorganic porous substance and a water-repellent additive to the moisture-absorbing and releasing resin layer, food and drink such as coffee and soy sauce, aqueous ink, crayon, etc., while maintaining excellent moisture absorbing and releasing performance. Resistant to dirt by
In addition, these stains can be easily removed.

Further, in the interior decorative material of the present invention, since the water-repellent additive is added to the moisture-absorbing / desorbing resin layer, the transfer of moisture in a liquid state from the adhesive layer side to the moisture-absorbing / desorbing resin layer side is prevented. Is suppressed. Therefore, when applying an adhesive as a diluting solvent or a dispersion medium to water on the back side (base layer side) of the interior decorative material of the present invention and applying it to an adherend, it is necessary to cure the adhesive. Since the time (open time) can be sufficiently secured, the work efficiency of the interior decorative material can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a structural sectional view of an interior decorative material of the present invention.

FIG. 2 is a structural sectional view of the interior decorative material of the present invention.

FIG. 3 is a cross-sectional view of main manufacturing steps when the interior decorative material of the present invention is manufactured using a support sheet.

FIG. 4 is a structural sectional view in which the interior decorative material of the present invention is adhered to an adherend surface via an adhesive layer.

FIG. 5 is a structural sectional view of a wallpaper sheet obtained in Example 1 and Comparative Example 2.

FIG. 6 is a diagram showing the results of a stain resistance evaluation test.

FIG. 7 is a diagram illustrating a procedure of an open time test during construction curing.

[Explanation of symbols]

 1, 11: moisture absorbing / releasing resin layer 1a, 11a: inorganic porous substance 1b, 11b: water repellent additive 1c, 11c: resin 1d: cellular foam 1A, 1B: interior decorative material of the present invention 11A: implemented Wallpaper sheet of Example 1 11C Wallpaper sheet of comparative example 2, 12 Base material (layer) 3 Moisture-permeable / waterproof layer 4 Decorative layer 5 Support sheet 6, 14 Adhesive layer 7 Adherend 13: Surface protective layer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08L 33/00 C08L 33/00 E04F 13/00 E04F 13/00 B // (C08L 23/00 83:04) (C08L 23/00 27:18) (C08L 33/00 83:04) (C08L 33/00 27:18) F term (reference) 4F100 AA01A AC03 AK03A AK17 AK24 AK25A AK68 AL05A AT00B BA02 CA01 CA18 CA23 CA23A CA23H DE01 DG10B DJ01A DJ01H GB08 JB06A JB06H JD14A JD16 JD16A 4J002 AC113 BB031 BB061 BB081 BB101 BB121 BB151 BC071 BD123 BD133 BD143 BD153 BE022 BE031 BF031 BG011 BG041 BG051 BG061 BG071 BG101 FD01 DG031 016

Claims (2)

[Claims] 1. A moisture-absorbing and desorbing resin layer comprising a resin composition containing an inorganic porous material and a water-repellent additive in one or a mixture of two or more of an acrylic resin and a polyolefin resin. Moisture absorbing and releasing interior decorative material. 2. A moisture absorbing / releasing interior decorative material having a base material layer and a moisture absorbing / releasing resin layer formed on the base material layer, wherein the moisture absorbing / releasing resin layer is made of an acrylic resin or a polyolefin resin. A moisture-absorbing and releasing interior decorative material comprising a resin composition containing an inorganic porous substance and a water-repellent additive in a resin comprising any one or a mixture of two or more thereof.