JP2000094560A - Ammonia-catching wall paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide ammonia-catching wall paper which has a catching function of unpleasant ammonia and is troubleless even when incineration disposal is performed. SOLUTION: A foamed plastic layer 3, a pattern printing layer 4 and a surface protective layer 5 are successively provided on the surface on one side of backing paper 2. The foamed plastic layer 3 is obtained by applying aqueous emulsion coating containing an unfoamed microcapsule type foaming agent and thereafter heating and foaming the same. Also, in a laminate in which the surface protective layer 5 is formed of an aqueous emulsion, an ammonia- catching agent is added to at least one of the foaming plastic layer 3 and the surface protective layer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wallpaper used for walls of houses, hotels, public facilities and the like.

[0002]

2. Description of the Related Art Conventionally, as a wallpaper, a structure in which a vinyl chloride foamed resin layer, a pattern printing layer, and a transparent protective layer are sequentially provided on a backing paper is often used, and the wallpaper is bonded to a surface of a base material of a wall surface. Has been used. As the base material constituting the base material of these wall surfaces, wood base materials such as wood plywood, wood fiber board and particle board, gypsum board such as gypsum board and gypsum slag board, pulp cement board and asbestos are generally used. Slate board, asbestos cement board, fiber cement board such as wood chip cement board, GRC, concrete and the like are often used. Among the above-mentioned base materials, for example, the wood base material is bonded by an adhesive, As the adhesive, urea-based, melamine-based or phenol-based resin adhesives are often used from the viewpoint of adhesive performance and cost, and ammonium chloride is used as a curing agent and a catalyst for the adhesive. Ammonium chloride used as a curing agent and catalyst remains in the wood-based base material, and becomes ammonia gas due to the moisture in the air and the water-soluble adhesive used when attaching wallpaper to the air. It is a problem because it is released and impairs the sanitary environment such as indoors. Furthermore, an alkaline gas represented by ammonia may be released into the air from a gypsum-based substrate, a fiber cement board, GRC, concrete, or the like, due to a curing accelerator added during cement production.

[0003] In addition, a decorative sheet is adhered to an interior of a building via an adhesive to a base material made of a wooden base material such as an interior material such as a ceiling material and a floor material, a door and a construction material such as a sliding door. There is also a problem that ammonia is released into the air from these interior materials and construction materials, which impairs the sanitary environment of a room or the like.

[0004] Furthermore, it contains ammonia and trimethylamine contained in the odor of tobacco widely present in living space recently, alkaline odor such as trimethylamine, and ammonia such as sweat and urine excreted from pet animals such as the human body, dogs and cats. There has also been a problem of giving an unpleasant sensation due to bad smell (hereinafter referred to as life smell).

Further, in the case of wallpaper having a structure in which a foam layer using vinyl chloride resin is formed on the backing paper, hydrogen chloride gas is generated when incinerated as waste due to the use of vinyl chloride resin. There was also the problem of doing.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to have a function of trapping unpleasant ammonia, and to be used even when incinerated. It is to provide a problem-free ammonia capture wallpaper.

[0007]

Means for Solving the Problems To achieve the above object, a solution of the present invention is to provide a foamed resin layer, a picture printing layer, and, if necessary, a surface protection formed on one surface of a backing paper by an aqueous emulsion. Layers are sequentially provided, and after the foamed resin layer is coated with an aqueous emulsion paint containing an unfoamed microcapsule-type foaming agent, and then heated and foamed, the foamed resin layer and at least the surface protective layer are obtained. On the other hand, an ammonia-capturing wallpaper is characterized in that an ammonia-capturing agent is added. With such a configuration, since both the foamed resin layer and the surface protective layer are made of an aqueous emulsion resin, it is easy to add and mix an ammonia scavenger, and since it is made of an aqueous solution, there is no evaporation of an organic solvent and fire prevention. In addition, it is preferable from the viewpoint of the working environment, and can retain the function of capturing and adsorbing ammonia. As a result, it is generated from an adhesive used for bonding a base material such as a base material used for a building interior such as a ceiling material or a floor material, or for attaching a decorative sheet or wallpaper to the base material. , Ammonia odor present in the indoor air, and life odor,
Since it is trapped and adsorbed by the ammonia trapping agent contained in at least one of the foamed resin layer and the surface protective layer of the laminate, the irritating odor due to ammonia is extremely reduced. Further, there is no problem in the waste disposal by combustion.

Further, a foamed resin layer, a pattern printing layer, and a surface protective layer formed of an aqueous emulsion, if necessary, are sequentially provided on one side of the backing paper. A base coat layer coated with an aqueous emulsion paint containing an agent and a surface coat layer coated with an aqueous emulsion paint containing no pyrolytic foaming agent.
In a laminate obtained by sequentially coating the layers and then performing heating and foaming, an ammonia scavenger is added to at least one of the surface coat layer and the surface protective layer of the foamed resin layer. By doing this,
The same effect as above is obtained, and, furthermore, since a surface coat layer made of an aqueous emulsion paint containing no thermal decomposition type foaming agent is provided on the upper surface of the base coat layer made of an aqueous emulsion paint containing the thermal decomposition type foaming agent, The release of the decomposition gas generated by the thermal decomposition of the thermal decomposition type foaming agent is suppressed, the base coat layer becomes a foamed resin layer having a high expansion ratio, and the upper surface of the surface coat layer is smooth, so that the printability is improved and the design property is improved. It will be excellent.

Furthermore, an ammonia trapping layer may be provided on the surface of the surface protective layer of the laminate. By doing so, it is generated from the adhesive used for bonding the wooden base material used for the ceiling material, floor material, etc., or attaching the decorative sheet to the base material, etc. Efficiently captures existing ammonia odor and life odor,
It can be adsorbed and can always keep the room in a good sanitary environment.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 are cross-sectional views showing a laminated structure of an embodiment of the wallpaper of the present invention.
20 and 30 are ammonia capturing wallpapers, 2 is backing paper, 3,
3 'denotes a foamed resin layer, 4 denotes a picture printing layer, 4a denotes a solid ink layer, 4b denotes a picture ink layer, 5 denotes a surface protective layer, and 6 denotes an ammonia trapping layer.

As shown in FIG. 1, the laminated structure of the ammonia-capturing wallpaper 10 of the first embodiment of the wallpaper of the present invention comprises a foamed resin layer 3 made of a microcapsule type foaming agent and a solid ink layer 4a on the upper surface of the backing paper 2. In the configuration in which the pattern printing layer 4 composed of the pattern ink layer 4b and the surface protection layer 5 are laminated,
An ammonia scavenger is added to at least one of the foamed resin layer 3 and the surface protection layer 5, so that the ability to capture and adsorb ammonia can be sufficiently exhibited.

The backing paper 2 used in the present invention is mainly composed of cellulose fibers, and optionally contains synthetic fibers, inorganic fibers, synthetic pulp, etc., as necessary, and contains a self-extinguishing filler, other fillers,
Dry paper strength agent, wet paper strength agent, colorant, sizing agent,
It is obtained by appropriately adding a fixing agent and the like to make paper.
Thickness 0.10 to 0.1 with a weighing of 0 to 140 g / m ² .
A flame-retardant paper for 12 mm wallpaper is preferably used.

Examples of the aqueous emulsion used for the foamed resin layer 3 of the present embodiment include, for example, aqueous emulsions such as vinyl acetate, ethylene-vinyl acetate copolymer, acrylic, polyolefin, SBR, silicone, polyurethane, and polybutene. A resin mixture of at least one kind or two or more kinds of emulsions can be used, and a foamed resin layer 3 is formed by adding a microcapsule type foaming agent and an ammonia scavenger to the aqueous emulsion to form a paint. You.

Here, as the microcapsule type foaming agent contained in the aqueous emulsion, organic foaming agents such as polyacrylonitrile, phenol resin, epoxy resin, urea resin and pitch are useful. In particular, a polyacrylonitrile-based expanded microcapsule containing a low-boiling hydrocarbon is effective.

The foamed resin layer 3 has flame retardancy, coloring,
An inorganic filler may be added for the purpose of cost reduction. In general, an inorganic filler such as aluminum hydroxide and magnesium hydroxide can be used, but aluminum hydroxide having self-extinguishing properties is preferable. The inorganic filler to be used preferably has an average particle size of 5 to 20 μm. If the particle size exceeds 20 μm, the surface of the foamed resin layer 3 becomes rough, and printability deteriorates. If the particle size is less than 5 μm, the cost is disadvantageous. Also, coloring agents such as titanium oxide, carbon black, cyanine blue and the like, calcium carbonate,
A filler such as clay can be appropriately blended.

The pattern printing layer 4 applied to the foamed resin layer 3 is
A solid ink layer 4a for solid printing on the entire surface and a pattern ink layer 4b for expressing, for example, a wood pattern, a stone pattern, a surface pattern of natural leather, a cloth pattern, an abstract pattern, and the like are applied, and known ink vehicles can be used. For example, an acrylic type, a nitrocellulose type, a nitrocellulose-alkyd type, if necessary for a simple substance or a mixture of a plurality of resin types such as a urethane type, a pigment, a coloring agent such as a dye, an extender pigment, a solvent, , An ammonia scavenger or the like can be appropriately mixed.

On the pattern printing layer 4, that is, on the outermost surface of the wallpaper, a surface protective layer 5 made of a transparent resin is formed for the purpose of imparting physical properties such as abrasion, abrasion and contamination to the wallpaper. The surface protective layer 5 made of the transparent resin is preferably a resin having a higher softening point than the resin constituting the foamed resin layer 3. As the resin used for the surface protective layer 5, for example, an acrylic resin, Polyolefin, vinyl acetate, ethylene-vinyl acetate copolymer, silicone,
A coating layer of at least one or a mixture of two or more of synthetic resin aqueous emulsions such as polyurethane and polybutene is preferred.

The foamed resin layer 3 or the surface protection layer 5
Examples of the ammonia scavenger added to one aqueous emulsion include zirconium oxides such as zirconium oxide, zirconium phosphate, titanium phosphate, cerium phosphate, layered phosphates such as aluminum trihydrogen diphosphate, chromium (Cr ), Manganese (Mn), cobalt (C
o), oxides such as nickel (Ni), copper (Cu), and vanadium (V), titanium (Ti) aluminum (A
l) binding of L-ascorbic acid to oxide agglomerated particles, iron sulfide, iron oxide or iron sulfide mainly containing zinc (Zn) and at least one selected from magnesium (Mg) and silicon (Si); Material, magnesium silicate, metal ion (C
r, Mn, Co, Ni, Cu, V, etc.) and a chelate compound composed of a polymer, zeolite, activated carbon, or an acid, a metal ion (Cr, Mn, Co, Ni, Cu, V, etc.), or a halide. And at least one of impregnated carbon and sulfonated carbon.

FIG. 2 shows a laminated structure of an ammonia-capturing wallpaper 20 according to a second embodiment of the wallpaper of the present invention. Hereinafter, the same reference numerals as those of the already described components are used, and duplicate description will be omitted. As shown in FIG. 2, the ammonia-capturing wallpaper 20 includes a foamed resin layer 3 ′ composed of a base coat layer 3 a and a surface coat layer 3 b on the upper surface of the backing paper 2, and a pattern print layer 4 composed of a solid ink layer 4 a and a pattern ink layer 4 b. And a surface protective layer 5 laminated thereon. The upper surface of the base coat layer 3a made of an aqueous emulsion resin containing a pyrolytic foaming agent is covered with a surface coat layer 3b made of an aqueous emulsion resin containing no pyrolytic foaming agent. This suppresses escape of gas generated by the thermal decomposition of the pyrolytic foaming agent, thereby forming a foamed resin layer 3 ′ having a high expansion ratio. At least one of the surface coat layer 3 b and the surface protective layer 5 has ammonia. A capturing agent is added, captures ammonia without forming an ammonia capturing layer,
This makes it easy to fully demonstrate the performance of adsorption.

Examples of the pyrolytic foaming agent added to the base coat layer 3a include azo compounds such as azodicarbonamide, azobisisobutylnitrile, and diazobenzene.
Nitroso compounds such as dinitrosopentamethylenetetramine, N, N-dimethyl-N, N-dinitrosoterephthalamide, paratoluenesulfonylhydrazide, 4,4-
Organic blowing agents such as sulfonyl hydrazide compounds such as oxybisbenzenesulfonyl hydrazide, and inorganic blowing agents such as sodium bicarbonate, ammonium carbonate, sodium boron hydride, and silicon oxyhydride.In addition, oxalic acid, citric acid It is desirable to adjust the decomposition temperature by using a decomposition aid such as tartaric acid, urea, a zinc compound, a copper compound and the like so as to decompose below the processing temperature of the base coat layer 3a to generate gas. Here, similarly to the first embodiment, the base coat layer 3a may of course contain an ammonia scavenger.

FIG. 3 shows a laminated structure of an ammonia-capturing wallpaper 30 according to a third embodiment of the wallpaper of the present invention. The ammonia capturing wallpaper 30 of the present embodiment has a configuration in which the ammonia capturing layer 6 is further laminated on the upper surface of the surface protective layer 5 located on the outermost surface in the configuration of the wallpapers 10 and 20 of the first and second embodiments. Efficiently removes ammonia odors and living odors generated from adhesives used for bonding wood base materials used for ceiling materials, floor materials, etc., or attaching decorative sheets to the base materials. Since the indoor environment is constantly captured and adsorbed, the indoor environment can always be in a good sanitary environment.

The formation of the ammonia trapping layer 6 can be easily formed by a well-known roll coating method, sponge roll coating method, knife coating method, or the like, using a coating solution obtained by kneading the ammonia trapping agent. Formaldehyde trapping layer 6
Is a solvent-type or aqueous-emulsion-type vehicle such as nitrified cotton / alkyd type, cellulose type, acrylic type, acrylic polyol type, ester type, etc., which is optionally mixed with the above-mentioned substance having an ammonia-scavenging action and additives. It can be formed by applying the applied coating liquid. When the coating liquid for forming the ammonia trapping layer 6 is a synthetic resin-based aqueous emulsion paint, an ammonia trapping agent can be easily added, and the ammonia trapping performance can be further improved. .

Here, although not particularly shown, FIGS.
Backing paper 2 of ammonia-capturing wallpaper 10, 20, 30 shown in Fig.
A layer having a longer open time (time from application of an adhesive to the backing paper to application) can be further coated with the same aqueous emulsion resin used to form the surface coat layer 3b on the lower surface of the substrate. Alternatively, an ammonia scavenger may be added to the layer to form a coating.

[0024]

[Blending of aqueous foam emulsion paint (unit: parts by weight)]

 Ethylene-vinyl acetate emulsion (solid content) 100 Aluminum hydroxide 120 Titanium oxide 10 Dispersant 1 Foaming agent Microcapsule 10 Ammonia scavenger 9 Water 100

Example 2 Flame-retardant backing paper weighing 70 g / m ² (manufactured by Tokushu Paper Co., Ltd.)
TT-70), using a comma coater, an aqueous emulsion paint containing the following pyrolytic foaming agent as a base coat layer, 100 g / m ² , and an aqueous emulsion containing no pyrolytic foaming agent, shown below, as a surface coat layer. The paint is applied to a film thickness of 30 μm, dried at 120 ° C. for 60 seconds, and a gravure printing of a colored solid ink layer and a pattern ink layer is performed thereon using an acrylic ink. It was applied with a gravure coater to 8 g / m ² (at the time of drying), heated at 200 ° C. for 40 seconds and foamed to prepare an ammonia-capturing wallpaper of the present invention. [Blending of base coat layer paint (unit: parts by weight)] Aqueous emulsion paint containing pyrolytic foaming agent Ethylene-vinyl acetate emulsion (solid content) 100 Aluminum hydroxide 120 Titanium oxide 10 Dispersant 1 Foaming agent Azodicarbon Acid amide 3 water 100 [Blending of paint for surface coat layer (unit: parts by weight)] Aqueous emulsion paint containing no pyrolytic foaming agent Ethylene-vinyl acetate emulsion (solid content) 100 Aluminum hydroxide 100 Titanium oxide 15 Dispersion Agent 1 ammonia scavenger 9 water 100

Example 3 Flame-retardant backing paper weighing 70 g / m ² (manufactured by Tokushu Paper Co., Ltd.
TT-70) with a comma coater to apply 130 g / m ² (at the time of drying) of a foamed aqueous emulsion paint,
After drying for 60 seconds, gravure printing of a colored solid ink layer and a picture pattern ink layer using an acrylic ink is performed thereon, and a gravure printing is performed so that the acrylic transparent paint becomes 1.8 g / m ² (when dried). Apply with a coater, 170 ℃
And foamed for 40 seconds to produce an ammonia-capturing wallpaper of the present invention. The composition of the foamed aqueous emulsion paint and the acrylic transparent paint is shown below. [Blending of aqueous foam emulsion paint (unit: parts by weight)] Ethylene-vinyl acetate emulsion (solid content) 100 Aluminum hydroxide 120 Titanium oxide 10 Dispersant 1 Foaming agent Microcapsule 10 Ammonia scavenger 9 Water 100 [Acrylic transparent Composition of paint (unit is parts by weight)] Acrylic emulsion (solid content) 100 Ammonia scavenger 9 Dispersant 1 Water 100

Example 4 Flame-retardant backing paper weighing 70 g / m ² (manufactured by Tokushu Paper Co., Ltd.)
TT-70), using a comma coater, an aqueous emulsion paint containing the following pyrolytic foaming agent as a base coat layer, 100 g / m ² , and an aqueous emulsion containing no pyrolytic foaming agent, shown below, as a surface coat layer. The paint is applied to a film thickness of 30 μm, dried at 120 ° C. for 60 seconds, and a solid ink layer and a pattern ink layer are gravure-printed thereon using an acrylic ink. It was applied with a gravure coater so as to have a concentration of 0.5 g / m ² (when dry), heated at 200 ° C. for 40 seconds to cause foaming, and further, the following ammonia trapping layer coating material was 2.0 g / m ² (when dry). Was applied with a gravure coater and dried at 150 ° C. for 20 seconds to prepare an ammonia-capturing wallpaper of the present invention. [Blending of base coat layer paint (unit: parts by weight)] Aqueous emulsion paint containing pyrolytic foaming agent Ethylene-vinyl acetate emulsion (solid content) 100 Aluminum hydroxide 120 Titanium oxide 10 Dispersant 1 Foaming agent Azodicarbon Acid amide 3 water 100 [Blending of paint for surface coat layer (unit: parts by weight)] Aqueous emulsion paint containing no pyrolytic foaming agent Ethylene-vinyl acetate emulsion (solid content) 100 Aluminum hydroxide 100 Titanium oxide 15 Dispersion Agent 1 Ammonia Scavenger 9 Water 100 [Blending of Ammonia Scrapping Layer Paint (Unit is Part by Weight)] Acrylic Emulsion (Solid Content) 100 Ammonia Scavenger 9 Dispersant 1 Water 100

Comparative Example 1 A foamed wallpaper having the same structure as in Example 1 except that the ammonia scavenger was removed from the foamed aqueous emulsion paint of Example 1 was used as Comparative Example 1.

Each of the wallpapers of Examples 1 to 4 and Comparative Example 1 was 12.5 mm thick × 900 mm wide × 1800 m long.
m was applied to a base material made of gypsum board with a non-formalin-based adhesive to prepare a wall material. Then, 1.97m x 1.97m x adjusted to an ammonia concentration of 2ppm
Wall material 6 prepared above in a 2.7 m high chamber
The sheets were applied to three wall surfaces, and after 24 hours, the ammonia concentration was measured.
5 ppm, 0.5 ppm in Example 2, and 0.3 ppm in Example 3.
ppm, 0.3 ppm in Example 4, and 1.8 p in Comparative Example 1.
pm.

[0030]

As described above, the ammonia-capturing wallpaper of the present invention can be easily mixed with the ammonia-capturing agent by forming the foamed resin layer with the aqueous emulsion solution, and the ammonia-capturing agent can adhere to the wallpaper in a large amount. Becomes
Its trapping performance is enhanced, and there is no evaporation of organic solvent during production, and it is preferable from the viewpoint of fire prevention and working environment,
Further, since the formation of the foamed resin layer and the formation of the ammonia trapping layer are performed simultaneously, a wallpaper having excellent ammonia trapping properties can be easily obtained without increasing the number of steps.

In the ammonia-capturing wallpaper of the present invention, the surface protective layer provided on the upper surface of the foamed resin layer may be used as an ammonia-capturing layer, or the ammonia-capturing layer may be provided on the surface of the surface protective layer. By attaching to the indoor wall of a building, etc., ceiling material,
Wallpapers with excellent ammonia-capturing properties that can effectively capture ammonia gas generated from interior materials such as wall materials and flooring materials, construction materials, and living odors existing in living spaces can be obtained.

Further, since no soft polyvinyl chloride is used, there is no need to worry about environmental problems such as the generation of toxic gas during combustion, and there is no need to worry about contamination due to bleeding of the plasticizer.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a laminated configuration of a first embodiment of a wallpaper of the present invention.

FIG. 2 is a cross-sectional view illustrating a laminated configuration of a second embodiment of the wallpaper of the present invention.

FIG. 3 is a cross-sectional view illustrating a laminated configuration of a third embodiment of the wallpaper of the present invention.

[Explanation of symbols]

 10, 20, 30 Ammonia-trapping wallpaper 2 Backing paper 3, 3 'foam resin layer 3a Base coat layer 3b Surface coat layer 4 Picture print layer 4a Solid ink layer 4b Picture ink layer 5 Surface protective layer 6 Ammonia capture layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ichiro Kawabata 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. 4F100 AA19B AA21B AK01B AK25C AK25D AK68B BA04 BA07 BA10A BA10D CA01B CA30B CA30D CC00B CC00C CC00D DE04B DG10A DJ01B DJ01E GB08 HB31C JC00 JD14B JD14D JJ07A JL06 JM01D JN01D

Claims (3)

[Claims] 1. A foamed resin layer, a picture printing layer, and a surface protective layer formed of an aqueous emulsion, if necessary, are sequentially provided on one side of a backing paper, and the foamed resin layer is formed of an unfoamed microcapsule type foam. An ammonia-capturing wallpaper characterized in that an ammonia-capturing agent is added to at least one of the foamed resin layer and the surface protective layer in a laminate obtained by coating with an aqueous emulsion paint containing an agent and then heating and foaming. . 2. A foamed resin layer, a picture printing layer, and a surface protective layer formed of an aqueous emulsion, if necessary, are sequentially provided on one side of the backing paper. A base coat layer coated with an aqueous emulsion paint containing an agent, and a surface coat layer coated with an aqueous emulsion paint not containing a pyrolytic foaming agent. An ammonia-capturing wallpaper, wherein an ammonia-capturing agent is added to at least one of the surface coat layer and the surface protective layer of the foamed resin layer. 3. The ammonia-capturing wallpaper according to claim 1, wherein an ammonia-trapping layer is provided on the surface of the surface protective layer of the laminate.