JP4583488B2 - Printing medium having air purification function and construction method thereof - Google Patents

Description

  The present invention relates to a printing medium having an air purification function that utilizes at least one side surface of an outdoor structure, and a construction method thereof. More specifically, the exterior surface of outdoor structures is used to improve and improve advertisements, announcements, aesthetics, landscapes, etc., and reduce the pollution of outside air by organic substances harmful to animals and plants such as exhaust gas and dust. The present invention relates to an effective print medium.

Printing media have long been widely used as a means for transmitting information through characters and patterns applied to various supporting media. In recent years, information transmission using this printing medium has been diversified, for example, electronic media has been widely used as information media. However, print media using the interior and exterior surfaces of indoor and outdoor structures are still widely used as media for advertising, announcements, landscape improvement, and beauty creation, from small to large.
Such print media, especially when installed outdoors and exposed to the outside air, is damaged by organic pollutants in the atmosphere caused by combustion exhaust gas of fossil fuels such as automobiles and trucks, etc. It will be shorter.
In addition, not only as a problem of the printing medium itself, air pollution has a serious adverse effect on the normal life and development of animals and plants on the ground, preventing air pollution and purifying contaminated air. Various measures are being studied and implemented.

For example, environments such as highways and roads dedicated to automobiles are polluted by exhaust gases from automobiles, and many attempts have been made to prevent this air pollution as much as possible. As a measure for preventing the road accessory from being discolored by air pollutants and losing its aesthetics, a road auxiliary equipment component having a photocatalyst layer supported on a substrate through an adhesive layer has been proposed (patent) Reference 1).
As seen in this proposal, titanium oxide (titania) with photocatalytic activity is used as a material for decomposing and removing malodorous and harmful substances scattered in the air, or as an environmental purification material for performing wastewater treatment, water purification, etc. ) Has been developed.
However, a print medium that has an effect as an advertising medium and also has an effect of removing air pollution has not been proposed yet.

JP 2000-27124 A

  An object of the present invention is to use atmospheric structures such as civil engineering / building, containers, fences, panels, etc. to decompose and remove pollutants in the atmosphere to prevent air pollution and to provide advertisement / notification media. Moreover, it is providing the printing medium which has the effect of a landscape maintenance, and has the air purification function, and its construction method.

The inventors of the present invention have intensively studied to solve the above-mentioned problems, and have completed the present invention.
That is, the present invention
1. A printed layer printed on the surface of the printing medium is laminated via an adhesive layer directly on at least one side surface of the outdoor structure or on a substrate placed on the side surface, and the transparent layer covering the printed layer is covered. A printing medium having an air purification function comprising a multilayer structure comprising a protective layer in which films or sheets are laminated, and a photocatalyst layer laminated by applying a coating liquid containing photocatalyst particles on the protective surface;
2. The printing layer performs desired printing on the material layer surface of the printing medium prepared by laminating the peeling sheet, the adhesive layer, and the printing material layer, and peels off the peeling sheet of the printing medium on which the printing has been performed. 2. A printing medium having an air purification function according to claim 1, which is a bonded and laminated layer;
3. 2. A printing medium having an air purification function according to claim 1, wherein the protective layer is a film or sheet in which a transparent coating liquid containing a silica-based resin is applied or sprayed on the surface of the printing layer to form a film. ,
4). A printing medium prepared by laminating a release sheet, an adhesive layer and a printing material layer directly on at least one side surface of the outdoor structure or on a substrate installed on the side surface is subjected to desired printing, and the coating is performed. The release sheet of the printing medium is peeled off and adhered, and then a protective layer is formed on the surface of the printing medium by covering with a permeable film or sheet to form a protective layer. Further, a photocatalyst is formed on the surface of the protective layer. A method for applying a printing medium having an air purification function, characterized in that a photocatalyst layer is formed by applying or spraying a coating liquid containing,
It is.

  The printing medium having an air purification function of the present invention is a printing layer obtained by printing on a printing material directly on at least one side of an outdoor structure or on a substrate installed on the side through an adhesive or a pressure-sensitive adhesive layer. A multilayer structure in which a transparent film or sheet covering the printed layer is laminated to form a protective layer, and a photocatalyst layer containing photocatalyst particles is further applied to the surface of the protective layer. is there. This print medium is a print layer in which a desired character or design is printed on a print medium prepared in advance, on a substrate installed on the side surface of the outdoor structure directly or on a side surface of the outdoor structure. A protective layer made of a permeable film or sheet covering the surface, and a photocatalyst layer containing a photocatalyst on the surface of the protective layer can be sequentially laminated. This construction may be a method of sequentially laminating each layer at the installation site of the print medium, or a print medium prepared by laminating necessary layers in advance can be installed on the side of the outdoor structure. Therefore, according to the size of the print medium, a construction method suitable for the construction cost can be selected and implemented.

According to the present invention, the attachment of the print medium to the outdoor structure can be performed in a simple process, the desired advertisement or notification information is informed, and the aesthetics of the construction area of the city or the building is maintained, Or the aesthetics of the container placed in an urban area or a harbor can be improved. In addition, the structure of the print medium allows the characters or patterns on the print medium to be clearly seen, and the influence of the photocatalyst of paints and pigments used for printing can be prevented.
Furthermore, the photocatalyst particles applied to the photocatalyst layer are decomposed and deodorized in the atmosphere, such as aldehydes, mercaptans, ammonia, various amines, and other odorous substances and harmful substances, as well as NOx, SOx, PCB, dioxin, organic Since the effects of decomposition and removal of harmful substances such as halogen compounds and organophosphorus compounds, and sterilization and algae treatment of various fungi and algae are also recognized, environmental protection of the space around the outdoor structure where the printing medium of the present invention is installed And can contribute to environmental purification. The NOx gas decomposition effect of the photocatalyst is remarkably superior to the mitigating effect of trees, so it is extremely effective in reducing harmful substances in the atmosphere due to exhaust gases from urban areas and harbor areas where there are few trees. The useful period of the installed print medium can be maintained for a long time.

Hereinafter, the present invention will be described in detail.
In the present invention, an outdoor structure is an outdoor building, construction, civil engineering to be built, an object built for the purpose of a building, a vehicle that operates on land or sea, or a structure that transports or stores articles. Etc., for example, buildings, exterior structures created around buildings (eg fences, fences, panels, etc.), containers (transport boxes used for transporting cargo, use as simple warehouses, etc.), vehicles The print medium of the present invention includes the above-described vehicle body and the like, and exhibits the effects of the present invention when applied to these aspects.
Further, in the present invention, the printing medium refers to a material that can be printed such as paper, synthetic paper, nonwoven fabric, resin sheet or film, or an adhesive or pressure-sensitive adhesive layer, a release agent, a release sheet, etc. Refers to a printable medium prepared by laminating layers. The print medium is a medium printed on the above-mentioned print medium, and the two are distinguished.

The print medium having an air purification function of the present invention has a multilayer structure in which at least the following layers are laminated.
That is, attached directly to at least one side of the outdoor structure or to a substrate installed on the side, at least,
(1) A printing layer that is printed on the surface of a printing medium that is bonded via an adhesive layer;
(2) a protective layer in which a transparent film or sheet covering the printed layer is laminated,
(3) Furthermore, a photocatalyst layer obtained by laminating a coating liquid containing photocatalyst particles on the surface of the protective layer,
Is a print medium having a multi-layer structure in which are sequentially stacked.
These layers (1) to (3) can be used as essential layers, and other layers can be included as long as they do not impair the effects of the present invention.

Moreover, the construction method of this invention will not be specifically limited if it is a method which can construct said printing medium, Preferably, the following method is mentioned.
That is, on at least one side of the outdoor structure, directly or on a substrate installed on the side,
(1) (a) A desired printing is performed on a material layer surface of a printing medium prepared by laminating a peeling sheet, an adhesive layer, and a printing material layer, and the peeling sheet of the printing medium subjected to the printing is peeled off. Or (b) after printing on the material to be printed, the print medium is adhered to the side or substrate of the outdoor structure with an adhesive to form a printed layer,
( 2 ) (c) A protective layer is laminated on the surface of the print medium by covering and adhering a film or sheet, or (d) a resin having film-forming ability is displayed on the surface of the print medium. Form a protective layer in the form of a film,
( 3 ) A method for applying a printing medium having an air purification function, wherein a photocatalyst layer is formed by applying or spraying a coating liquid containing a photocatalyst to the surface of the protective layer,
It is.

The location of the outdoor structure where the print medium having the air purification function of the present invention is installed is at least one external side surface, so-called wall surface, in which the print medium of the present invention effectively exerts the effect of the present invention, and the side surface subjected to light irradiation. preferable. The side surface may be a flat surface or a gently curved surface. Moreover, as long as it is a surface which can adhere | attach a to-be-printed medium or a printing medium firmly, some rough surfaces may be sufficient. When the wall surface is rough, a buffer / filler may be applied in advance within a range that does not reduce the adhesive strength of the adhesive in order to obtain a smooth flat surface.
Alternatively, a flat substrate may be firmly attached to a side surface of the outdoor structure with a fastener such as a screw, or a printing medium or a printing medium related to the present application may be provided and attached. .
In addition, since the print medium of the present invention has an air purification function particularly at a position where sunlight can reach, it can be applied as needed not only on the side but also on the ceiling and floor. If the photocatalyst is a visible light responsive type, the applicable range is not limited to the above range, and it can be applied under a wide range of light irradiation where ultraviolet rays are weaker.

When the substrate is used, the material of the substrate can be selected from wood, wood board, wood fiber board such as plywood, inorganic base material, or organic polymer.
Examples of the inorganic base material include Si compounds, Al compounds, various ceramics and metals. Specific examples include silica, alumina, mullite, spinel, zirconia, titania, graphite, carbon nanotube, diamond, iron, stainless steel, titanium, zircon and the like.

  Examples of organic polymers include polyethylene, polypropylene, polystyrene, nylon 6, nylon 66, aramid, polyethylene terephthalate, unsaturated polyester, polyvinylidene chloride, polyethylene oxide, silicon resin, vinyl acetal resin, polyacetate, ABS resin, epoxy resin, Examples thereof include vinyl acetate resin, urethane resin, urea resin, fluorine resin, polyvinylidene fluoride, phenol resin, acrylic resin, melamine resin, and alkyd resin.

  Moreover, when installing the frame which attaches a printing medium in order to fix a board | substrate to an outdoor structure, the shape and material are not specifically limited. It can be appropriately selected in consideration of strength, durability, weather resistance and the like. In particular, the aluminum plate is preferable because it is lightweight and easy to install and has a strength to hold a flat surface without being bent. In order to install the substrate on the frame, any fixing method such as an adhesive or a screw may be used.

Each layer of the print medium having the air purification function of the present invention will be described.
The printing layer is configured using a material that can directly draw or print a character or a pattern with a paint such as a dye or a pigment. The material to be printed is not particularly limited, and plastic films and sheets such as paper, synthetic paper, cloth, nonwoven fabric, polyolefin, polyester, and polystyrene are used.
The print medium of the present invention is
(1) These printed materials are adhered to the desired side of the outdoor structure at the construction site or to a substrate installed on the side by an adhesive, and a printed layer (characters and pictures are drawn on the material) Hand-drawn forms are also called printed layers),
(2) Moreover, the printing layer which stuck the printing medium previously printed on the to-be-printed material with the adhesive agent,
(3) More preferably, it is prepared by laminating a release sheet, an adhesive layer, and a printing material layer. For example, an adhesive is applied to one surface of the printing material layer to provide an adhesive layer, A print layer in which a release sheet is attached on a layer, and the print medium printed on the surface of the printing material is peeled off and adhered to the print medium.
Can be given.

In the printing medium prepared in advance, the release sheet is not particularly limited. However, a sheet made of paper coated with silicon on the surface or a synthetic resin sheet such as polyethylene terephthalate having a smooth surface can be used. Moreover, as an adhesive used for the adhesive layer between the printing material and the release sheet, an acrylic adhesive, a urethane adhesive, an emulsion adhesive, or the like is appropriately used depending on the combination of the printing material and the release sheet. It can be selected and used. In addition to the adhesive, a pressure-sensitive adhesive may be appropriately used depending on the purpose.
Moreover, the adhesive agent which adhere | attaches a printing raw material or a printing medium to a side surface or a board | substrate is not specifically limited, Considering the magnitude | size and weight of a printing medium, it can select and use an appropriate thing from various adhesive agents. Examples thereof include acrylate adhesives, urea melamine adhesives, phenol adhesives, urethane adhesives, epoxy adhesives, silicon adhesives, and the like.

There are no particular limitations on the method of creating characters, patterns, and the like displayed on the surface of the material layer of the printing medium as long as the desired characters and patterns can be drawn. Of course, printing methods such as letterpress printing, offset printing, flat plate printing, gravure printing, screen printing, ink jet printing or electrostatic printing are applied.
The dye or pigment of the ink paint used in these printings is not particularly limited, but one having excellent weather resistance is selected and used.

The protective layer is a film or sheet layer that covers the surface of the printing medium on which the character or the pattern is printed on the material surface of the printing medium.
The material of the film or sheet is polyethylene, polypropylene, polystyrene, nylon 6, nylon 66, aramid, polyethylene terephthalate, unsaturated polyester, polyvinylidene chloride, polyethylene oxide, silicon resin, vinyl acetal resin, polyacetate, ABS resin, epoxy resin A film or sheet of resin selected from vinyl acetate resin, urethane resin, urea resin, fluorine resin, polyvinylidene fluoride, phenol resin, acrylic resin, melamine resin, alkyd resin, etc. Use a material with good permeability.
In particular, a resin having excellent compatibility with the photocatalyst particles, for example, an organic solvent solution of a silica-based resin (a ketone resin containing a silica compound) is applied or sprayed on the surface of the printing layer to a predetermined thickness to form a thin film. The formed film is preferable as a film or sheet that effectively exhibits workability, uniform distribution of titanium oxide particles, and catalytic effect.
Usually, the thickness of a protective layer should just be 0.1-0.5 micrometer normally.

In addition, in order to adhere these films or sheets to the surface of the printing medium layer (referring to the printed surface), an adhesive layer is previously applied to one surface of the film or sheet, and a release sheet is further adhered to the layer. It is also possible to use a surface protective film or sheet prepared in (1). In the case of a film or sheet having a release sheet, the release sheet is attached to the surface of the print medium while being released.
Alternatively, an adhesive may be applied to the surface of the print medium, and then a film or a sheet may be attached.
It does not specifically limit as an adhesive agent, Usually, what uses a film or a sheet | seat for adhesion | attachment is used. For example, acrylic resin, styrene butadiene copolymer, natural rubber, phenol resin, and what is called a heat-sensitive adhesive to which adhesiveness is imparted by heating, for example, polyethylene, polyvinyl acetate, or a copolymer thereof Further, thermoplastic resins such as acrylic resins or ethylene-acrylic acid copolymers, and uncured thermosetting resins such as epoxy resins and phenol resins can also be used.

The photocatalyst layer is a layer formed by applying or spraying a coating agent containing photocatalyst particles in a binder to the surface of the protective layer.
Examples of the photocatalyst particles include zinc oxide, titanium oxide, zirconium oxide, cadmium sulfide, potassium tantalate, potassium titanate, strontium titanate, cadmium selenide, niobium oxide, iron oxide, tungsten oxide, and tin oxide. The titanium oxide is preferably a rutile type, anatase type or a brookite type titanium oxide due to the difference in crystal structure, but is preferably a rutile type or anatase type titanium oxide. More preferably, anatase-type titanium oxide having high catalytic ability and high transparency, and a highly efficient titanium oxide photocatalyst exhibiting a photocatalytic effect not only under ultraviolet rays but also under visible light, depending on the installation environment of the printing medium. May be preferably used selectively.

The photocatalyst particles are dispersed in a solvent to form a slurry, and a binder is added thereto to form a coating agent on the surface of the protective layer. The method of coating may be applied by using an application tool such as a wrinkle, wrinkle or roller, or may be sprayed by using a spray application tool. The method of spray coating is not particularly limited, and a coating film can be formed by coating using a spray gun suitable for each method such as an air atomization method, an airless method, and an air atomization low pressure method. Application by spraying is preferable from the viewpoint of work efficiency.
Although there is no restriction | limiting in particular in the solvent of a photocatalyst particle, Usually, since the surface of a photocatalyst particle is hydrophilic, a hydrophilic solvent is used preferably. An aqueous solvent such as water or a mixed solvent of water and a hydrophilic organic solvent is recommended.

There is no restriction | limiting in particular about the content rate of the photocatalyst particle | grains in a slurry, For example, the range of 0.01 mass%-50 mass%, Furthermore, 1 mass%-40 mass% is desirable. When the content of the photocatalyst particles is less than 0.01% by mass, a sufficient photocatalytic effect cannot be obtained after coating.
If it exceeds 50% by mass, coating will be poor due to thickening and the like, and it will be economically disadvantageous. When a solvent containing water is used, the pH of the slurry is preferably 5-9. More preferably, the pH is 6-8. If the pH is less than 5 or greater than 9, it is not preferable because it adversely affects the living body and the environment, and the corrosive action on metals cannot be ignored. Various metal oxides can be added to the slurry in order to improve the photocatalytic ability and adhesion during molding such as coating. The metal element is preferably a transition metal element, alkaline earth metal, alkali metal, Zr, Si, Sn, or Ti selected from IIIb group or IV group. Of these, Zr and Si are preferable.
Although there is no restriction | limiting in particular in the addition method of the said metal oxide, For example, the method of adding the sol synthesized by the liquid phase method using the metal alkoxide as a raw material is mentioned.

  A sheet having photocatalytic activity can be produced by arbitrarily adding a binder to the slurry (dispersion) to form a coating agent and applying this to the surface of the sheet. The coating agent can be used in the form of a paint or a coating composition. The binder material added here is not particularly limited, and may be an organic binder or an inorganic binder. Examples of the organic binder include water-soluble binders, and specific examples include polyvinyl alcohol, melamine resin, urethane resin, celluloid, chitin, starch sheet, and polyacrylamide. Examples of inorganic binders include Zr compounds, Si compounds, Ti compounds, and Al compounds. Specific examples include zirconium compounds such as zirconium oxychloride, hydroxyzirconium chloride, zirconium nitrate, zirconium sulfate and zirconium acetate, and silicon compounds such as alkoxysilane and silicate.

The addition amount of the binder in the coating agent is, for example, 0.01% by mass to 20% by mass, preferably 1% by mass to 10% by mass.
The pH of the coating agent after mixing with the binder is 5 to 9, preferably 6 to 8.
Since the slurry exemplified above has high light transmittance, a film obtained therefrom has high transparency. As photocatalyst particles that give a highly transparent film, it is recommended to use titanium dioxide synthesized by a liquid phase method as a raw material.
Specifically, particles obtained by surface-treating particles obtained by thermal hydrolysis or neutralization hydrolysis using a TiCl ₄ aqueous solution or a titanyl sulfate aqueous solution with a polybasic acid salt are exemplified. Usually, the thickness of the film | membrane in which the formed film | membrane shows photocatalytic activity effectively is 0.01-100 micrometers. Moreover, in order to suppress interference fringes effectively, the thickness of the film is preferably 0.01 to 0.1 μm, or 1 μm or more.
Hereinafter, specific embodiments of the present invention will be given as examples. However, the present invention is not limited to this embodiment.

Applicable release sheet for ink jet printing, the print medium consisting of the adhesive layer and the printing substrate layer (polyolefin soft type) (nip Corporation Ltd.: N S G1200GMRT) used, with an outdoor weather resistant organic solvent-based ink Then, an advertisement designed to have a desired character and design was printed by an ink jet printing apparatus to prepare a printed print medium.
This print medium was directly attached to the side surface of the container by peeling the release sheet.
On the surface of the printing medium layer, a coating solution (Ishihara Sangyo Co., Ltd., brand names: Hydrotect ST-K152a and Hydrotect ST-K152b) whose viscosity is adjusted with alcohol / water in a solution in which a silica resin is dissolved in a ketone solvent is prepared. Then, this coating solution was sprayed with an air spray gun so that the thickness of the coating film was 0.2 to 0.3 μm to form a protective film layer.
Next, a titanium oxide-containing coating solution (Ishihara Sangyo Co., Ltd., brand name: Hydrotect ST-K252) in which anatase-type titanium oxide fine particles having a particle size of 0.5 to 1 nm are dissolved in alcohol / water is air-treated. The photocatalyst layer was formed by spraying on the surface of the protective layer with a spray gun so that the thickness of the coating film was 0.1 to 0.2 μm.
The photocatalyst layer was a coating film with good permeability, and printed characters and pictures could be sufficiently visually confirmed.
The air purification function is excellent as shown in the following reference example .

Reference Example A sample on which a photocatalyst layer was formed was prepared according to Example 1, and the decomposition rate of NOx was measured using this sample.
After irradiating ultraviolet rays from the front of the sample (50 mm x 100 mm) for 5 hours, in a container in which gas flows, a mixed gas set with a NOx concentration of 1 ppm is supplied at 3 liters per minute for 5 hours to reduce the decomposition rate. It was measured.
As a result, the NOx removal rate of the sample was 27.6% per supplied NO amount, and the removal amount per 1000 m ^{2 of} the sample was calculated to be 75 g.
If the amount of NOx reduced by poplar per day is 0.57 g / 1 (the Environmental Regeneration and Conservation Organization “Air Purification Planting Manual”), the amount of NOx removed per 1000 m ² of the printing medium of the present invention is 1 day. Since irradiation for 8 hours is 75 g × 8 (irradiation time per day) / 5 (test time) = 120 g, this removal amount corresponds to poplar 120 / 0.57 = 210.5. It can be seen that the effect is great.

The printing medium having the air purification function of the present invention is an outdoor structure, for example, as a medium for displaying advertisement, notification information on the side of a fence, a fence, a panel, a container, etc. and decomposition deodorizing and harmful substances, since it is also observed the effect of decomposing and removing such harmful substances of the NO _X and sO _X, advertising aspects of outdoor structures and can be effectively used to improve and improve landscape aesthetics together environment It can also contribute to purification.

Claims (3)

Directly on at least one side of the outdoor structure or on a substrate installed on the side,
Applying an adhesive on one surface of the printing material layer, providing an adhesive layer, and applying a desired printing to the printing material layer of the printing medium having a release sheet on the layer, and setting the printing medium At the site, the release sheet of the printing medium is peeled off, and an adhesive layer is bonded to the substrate to form a printing layer.
Next, at the installation site, a coating liquid containing a silicone resin is sprayed on the surface of the printed layer using a spray gun to form a protective layer,
Further, the air purification is characterized in that a photocatalyst layer is formed by spraying a coating liquid containing anatase-type titanium oxide particles, which are photocatalyst particles, on the surface of the protective layer using an air atomization low-pressure spray gun. A method for constructing a print medium having a function.   The method for constructing a print medium having an air purification function according to claim 1, wherein the outdoor structure is a building, an external structure made around the building, a container, or a vehicle body of a vehicle. The method for applying a print medium having an air purification function according to claim 1 or 2, wherein the printing applied to the material layer to be printed is any one of screen printing and ink jet printing on a resin sheet or film.