JPH10202058A - Adsorptive and decomposing light reflection sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a replacable adsorptive and decomposing light reflection sheet having stain-proofing, deodorizing and anti-bacterial action by providing a white adsorptive and decomposing layer containing titanium oxide and an inorganic adsorbent on a non-air permeable flexible supporting body and a strippable adhesive layer on the opposite side of the supporting body. SOLUTION: In this replacable adsorptive and decomposing light reflection sheet to be used by being stuck to a reflecting plate of an illuminating equipment, and having stain-proofing and deodorizing effect, the white adsorptive and decomposing layer containing titanium oxide and the inorganic adsorbent is provided on the non-air permeable flexible supporting body and the strippable adhesive layer is provided on the opposit surface of the supporting body. Or a barrier layer and the white adsorptive and decomposing layer containing titanium oxide and the inorganic adsorbent are successively provided on the non-air permeable flexible supporting body and the strippable adhesive layer is provided on the opposite surface of the supporting body. As the titanium oxide, hydrate titanium oxide, metatitanic acid or the like is used, and as the inorganic adsorbent, activated clay, sepiolite and the like are exemplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorbable and decomposable light-reflecting sheet having a replaceable antifouling and deodorizing effect which can be used by attaching it to a reflection plate or the like provided in a lighting device such as a fluorescent lamp, and the use thereof. Lighting equipment and blinds.

[0002]

2. Description of the Related Art Recently, with an increasing interest in the harmful effects of tobacco in the living environment, demands such as anti-smoke, removal of tobacco odor, and pollution control have been increasing in daily life.
Smoking cessation areas in public facilities have been secured, and smoking cessation areas are increasing in private restaurants, airplanes, trains and taxis. The removal of tobacco odor has also been promoted in the living environment through the development of deodorizing fibers and the development of adsorption and decomposition air purifiers using composite inorganic adsorbents such as activated carbon, silica, alumina and metal oxides. Is moving in a direction to remove its effects from

[0003] However, the direct contamination of the living environment by cigarettes, that is, the dirt in which tar-like substances such as cigarette sticks adhere to walls, floors, ceilings, furniture, lighting equipment, etc., is solved. There was no means to do it. Above all, with regard to lighting equipment, once the reflector is dirty with dirt, it is very difficult to remove it.As a result, the light reflection efficiency is reduced, not only the effective light amount is reduced, but also the energy loss is large. there were.

[0004] The reason why it is difficult to remove the cigarette tar attached to the reflector is that the reflector is used very close to the light source, and the light and heat from the light source oxidize or crosslink the attached tar. It is conceivable that the stain is chemically deteriorated due to the progress of the swelling, and it becomes difficult to swell and dissolve in water or detergent. As a means for preventing the reflection plate from being stained, a method in which a transparent plastic sheet is adhered to the reflection plate as a protection sheet and the sheet is replaced if the sheet becomes dirty can be considered. Is frequently replaced, which is not preferable in terms of resource saving.

As a method for removing contaminants, a method for removing contaminants using a photocatalyst is known. For example, Cun
dall et al. Oil. Chem. Assoc. 1
978, 61, and 351 report that when ultraviolet light is irradiated on titanium oxide, alcohol is decomposed in a mixed system of water and alcohol. Further, JP-A-61-1
No. 35669 reports that when a photocatalyst such as zinc oxide is irradiated with ultraviolet light, a sulfur compound as a malodorous substance is decomposed. In these photocatalytic decomposition reactions, the photocatalyst is not consumed as the reaction proceeds, and its decomposition ability is semi-permanent as long as light is exposed. The photocatalytic reaction is an interfacial reaction, and the more frequently the photocatalyst contacts the decomposition target, the more efficiently the photocatalytic reaction proceeds.
Therefore, the shape of the photocatalyst is preferably a powder capable of obtaining a large specific surface area, but it is difficult to use the photocatalyst as a powder, and some measures are required for handling.

[0006] As a method for fixing the photocatalyst powder, JP-A-6
In Japanese Patent Application Laid-Open No. 3-127760, a method of directly baking to an electric lamp has been devised, and in Japanese Patent Application Laid-Open No. 3-233100, an adhesive is applied to the outer peripheral wall surface of a glass tube, and titanium oxide pulverized to the order of submicrons thereon, A facility has been devised for removing harmful gases from a motorway tunnel, which is formed by applying a mixture of activated carbon and ferric oxide powder in a dust-like manner. However, such a method for fixing the photocatalyst has a problem that the exposed surface of the photocatalyst is reduced, contact with the decomposition object is hindered, and sufficient characteristics cannot be exhibited. In addition, in the case of a support such as glass, there is also a problem that the weight of the support itself is heavy and is difficult to handle, and it is easily broken and dangerous.
In terms of handling and safety, there was a problem in using it as a reflector.

If there is an effective fixing method that does not hinder the function of the photocatalyst, it is conceivable to fix the photocatalyst directly to the reflector. However, when considering the antifouling of a reflecting plate such as a fluorescent lamp, the function as the reflecting plate is first, and antifouling, that is, being hardly stained, is merely an incidental condition. If the resolution is reduced and the antifouling effect is reduced due to the accumulation of decomposed oxidized products (nitric acid, sulfuric acid, etc.), it is too uneconomical to replace the reflectors that have not reached the end of their product life. It is.

The inventors of the present invention have proposed a light-reflective sheet that can be reattached in order to solve such a problem.
No. 8981, a replaceable mold having a white coating layer containing at least titanium oxide on a non-permeable flexible support, and having a pressure-sensitive adhesive layer capable of being peelably adhered to the opposite surface of the support. A light reflection sheet is proposed. The light-reflecting sheet is formed by the excellent photocatalytic ability of titanium oxide.
It has not only an antifouling effect but also a deodorizing and antibacterial effect, but its antifouling, deodorizing and antibacterial effect is brought about by a photocatalytic reaction, such as when a light source such as a fluorescent lamp is turned off, in a dark place, at night, etc. Under the situation where the amount of ultraviolet rays is insufficient, there is a problem to be solved that the characteristics cannot be sufficiently exhibited.

[0009]

An object of the present invention is to provide an effective antifouling, deodorizing and antibacterial action which overcomes the above-mentioned drawbacks,
Another object of the present invention is to provide an adsorbable and decomposable light-reflective sheet that can be replaced and an illumination device and a blind using the same.

[0010]

Means for Solving the Problems The present inventors have studied to solve the above problems, and as a result, have reached the following invention.

A white adsorption / decomposition layer containing titanium oxide and an inorganic adsorbent is provided on a flexible support having no air permeability;
A replaceable adsorptive decomposable light reflecting sheet having an antifouling and deodorizing effect, characterized in that an adhesive layer capable of being peelably adhered is provided on the opposite surface of the support.

A barrier layer, a white adsorbing and decomposing layer containing titanium oxide and an inorganic adsorbent are sequentially provided on a non-permeable flexible support, and a pressure-sensitive adhesive layer which can be peelably adhered to the opposite surface of the support. A repositionable adsorptive / decomposable light reflecting sheet having an antifouling and deodorizing effect, characterized by comprising:

A protective layer containing an ultraviolet absorber and a white adsorption-decomposition layer containing titanium oxide and an inorganic adsorbent are sequentially provided on a non-permeable flexible support, and can be peeled off on the opposite surface of the support. A releasable adsorptive decomposable light reflecting sheet having an antifouling and deodorizing effect, wherein a pressure-sensitive adhesive layer capable of adhering to the sheet is provided.

A white adsorbing and decomposing layer containing at least titanium oxide and an inorganic adsorbent is provided on a non-permeable flexible support, and a pressure-sensitive adhesive layer which can be peelably adhered to the opposite surface of the support is provided. A releasable adsorptive / decomposable light reflecting sheet having an antifouling / deodorizing effect, characterized in that a breathable top coat layer is provided on the white adsorbing / decomposing layer.

A white adsorbing and decomposing layer containing at least titanium oxide and an inorganic adsorbent is provided on a non-permeable flexible support, and a pressure-sensitive adhesive layer which can be peelably adhered to the opposite surface of the support is provided. A replaceable adsorptive / decomposable light reflecting sheet having an antifouling / deodorizing effect, wherein the adhesive sheet has a reflectance of 50 or more.

[0016] A white adsorbing and decomposing layer containing at least titanium oxide and an inorganic adsorbent is provided on a non-permeable, flexible support, and a pressure-sensitive adhesive layer which can be peelably adhered to the opposite surface of the support is provided. A lighting device equipped with a removable adsorption-decomposable light reflecting sheet having an antifouling and deodorizing effect around a light source.

[0017] A white adsorbing and decomposing layer containing at least titanium oxide and an inorganic adsorbent is provided on a non-permeable flexible support, and a pressure-sensitive adhesive layer which can be peelably adhered to the opposite surface of the support is provided. Blinds equipped with a sticking-type adsorption-decomposable light-reflective sheet that has an antifouling and deodorizing effect.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The components relating to the adsorptive / decomposable light reflecting sheet of the present invention will be described in detail below. The adsorptive / decomposable light reflecting sheet according to the first aspect of the present invention comprises a white adsorptive / decomposable layer containing at least titanium oxide and an inorganic adsorbent, a flexible support having no air permeability, and a pressure-sensitive adhesive layer capable of being peelably bonded. Consists of

First, the white adsorption / decomposition layer will be specifically described below. The white adsorbing / decomposing layer of the present invention is a white adsorbing / decomposing layer containing at least titanium oxide and an inorganic adsorbent and capable of adsorbing, decomposing and removing harmful substances such as pollutants, odors and bacteria. The white adsorption / decomposition layer will be described through specific description of titanium oxide and the inorganic adsorbent which are essential components of the white adsorption / decomposition layer.

Examples of the titanium oxide according to the present invention include conventional titanium oxide, titanium oxide hydrated, hydrated titanium oxide, metatitanic acid, orthotitanic acid, and titanium oxide or hydroxide called titanium hydroxide. All things. As a method for producing titanium oxide, a method of hydrolyzing titanyl sulfate, titanium chloride, an organic titanium compound or the like in the presence of seeds for nucleation as necessary (hydrolysis method), A method in which an alkaline agent is added to neutralize titanyl sulfate, titanium chloride, an organic titanium compound, etc. while coexisting (neutralization method), and a method in which titanium chloride, an organic titanium compound, etc. are vapor-phase oxidized (gas-phase oxidation method) And a method of firing the titanium oxide obtained by the hydrolysis and neutralization method (sintering method). Although titanium oxide obtained by any of the production methods can be used, it is preferable that the titanium oxide according to the present invention has many hydroxyl groups on its surface.

The titanium oxide according to the present invention generates free radicals on its surface when irradiated with light. When light is irradiated when contaminants such as cigarette tar are adsorbed on the surface of titanium oxide, the generated free radicals attack the contaminants and generally undergo oxidative decomposition. In this process, as described in "Titanium Oxide" (by Manabu Kiyono, published by Gihodo), surface hydroxyl groups of titanium oxide are the generation points of free radicals. For this reason, the performance required for titanium oxide is not only light absorption and charge separation, but also various performances such as generation and regeneration of free radicals of surface hydroxyl groups. In order to sufficiently exert these processes, it is effective to increase the specific surface area of titanium oxide and increase the number of surface hydroxyl groups that are free radical generation points.
In addition, when the specific surface area of the titanium oxide is increased, the contact area with the contaminant increases, which is preferable in that the efficiency of decomposing and removing the contaminant is improved. The specific surface area of the titanium oxide used for the adsorptive / decomposable light reflecting sheet of the present invention is 50 m
² / g or more, more preferably 10
0 m ² / g or more. The particle size of titanium oxide having such a specific surface area is preferably 30 nm or less, and more preferably 10 nm or less. The state of the particles may be the state of primary particles, or the state of agglomerated particles does not affect the performance of removing contaminants.

As a semiconductor having a photocatalytic action such as titanium oxide, metal oxides such as zinc oxide, tungsten trioxide and cerium oxide can be cited. Titanium oxide is the most suitable for use in the present invention because of its photocatalytic ability and safety in handling.

Next, the inorganic adsorbent will be specifically described below.

The inorganic adsorbent according to the present invention includes activated clay, natural and synthetic zeolites, sepiolite, zinc oxide, magnesium oxide, aluminum oxide, silica,
Examples include a silica-zinc oxide composite, a silica-alumina-zinc oxide composite, and a composite phyllosilicate. These may be used alone or in combination depending on the purpose. When used as a light reflecting sheet, the reflectance is an important factor, and therefore, a white inorganic adsorbent is preferable.However, as long as the factor is not impaired, a color pigment such as activated carbon may be mixed. You can use it without any problem. The shape of these inorganic adsorbents is not particularly limited, but in consideration of mixing with titanium oxide, particles are preferable, and the specific surface area is 50 to 200.
A material of 0 m ² / g can be appropriately selected and used.

By using an inorganic adsorbent, even when the light source such as a fluorescent lamp is turned off, in a dark place, at night, or the like, even when the amount of ultraviolet light is small, pollutants, odors and harmful substances such as bacteria by the adsorbent can be eliminated. Not only can it be adsorbed and removed, but also the photodecomposition reaction by titanium oxide when the light source is turned on can be made efficient. This is probably because the harmful substances adsorbed on the inorganic adsorbent are gradually decomposed by the titanium oxide.

The content of titanium oxide and the inorganic adsorbent in the adsorptive / decomposable light reflecting sheet of the present invention is preferably 0.5 to 80% by weight, more preferably 2 to 70% by weight of the total weight of the white adsorptive / decomposable layer. % Titanium oxide /
The weight ratio of the inorganic adsorbent is suitably about 1:10 to 10: 1. If the amount is less than 0.5% by weight, the effect of adsorbing and decomposing harmful substances cannot be substantially expected. If the amount exceeds 80% by weight, the titanium oxide and the inorganic adsorbent may be firmly held in the white adsorption and decomposition layer. No longer possible, causing powder drop. In the white adsorbing and decomposing layer, when the concentration of the titanium oxide and the inorganic adsorbent is given a gradient in the thickness direction, for example, when the white adsorbing and decomposing layer is produced so that the concentration of the titanium oxide and the inorganic adsorbing agent on the surface is increased. Even if the absolute amounts of the titanium oxide and the inorganic adsorbent contained in the white adsorption / decomposition layer are small, a corresponding effect can be expected.

In providing the white adsorption-decomposition layer containing the titanium oxide and the inorganic adsorbent according to the present invention on a support, an inorganic binder is used as a binder. Specific examples of the inorganic binder include saponite, hectorite, smectite group such as montmorillonite, vermiculite group, kaolinite, kaolinite-serpentine group such as halloysite, natural clay minerals such as sepiolite, colloidal silica, colloidal aluminum and These modified products and synthetic inorganic high molecular compounds are exemplified.

The modification in the above-mentioned modified product in the present invention refers to the removal of impurities or specific atomic groups from natural minerals, the treatment of specific elements in natural mineral constituent elements by an appropriate method, and the like. By exchanging with other elements, or by chemical treatment with another compound (especially an organic compound) to modify the physical properties of the mineral surface, in particular, to extend the properties inherent in the original natural mineral or to add new properties As specific examples of the modified product of the present invention, Na-montmorillonite obtained by treating Ca-montmorillonite with sodium carbonate or the like in the presence of water and performing ion exchange, a cationic surfactant and / or Those treated with a nonionic surfactant are exemplified.

The synthetic inorganic high molecular compound referred to in the present invention is a compound obtained by substituting a specific element having the same composition with another element in order to obtain a composition equivalent to a natural mineral or to impart new properties. And a compound obtained by reacting two or more kinds of compounds, and examples thereof include a fluoromica in which a hydroxyl group in a structure of a natural mica family is substituted with fluorine, and a synthetic smectite. Representative examples of fluorine mica include fluorophlogopite [KMg ₃ (AlSi ₃ O ₁₀ ) F ₂ ], tetrasilicon mica [KMg _2.5 (Si ₄ O ₁₀ ) F ₂ ], teniolite [KM
g ₂ Li (Si ₄ O ₁₀ ) F ₂ ].

It is preferable that the inorganic substance according to the present invention exhibits a colloid at least in a coating solution. Therefore, when these are used, particularly, a natural mineral is pulverized into fine particles, and a non-colloidal component is previously appropriately treated. It must be removed by a method. Examples of the inorganic binder preferably used in the present invention include synthetic inorganic polymer compounds such as colloidal alumina, fluoromica, and synthetic smectite which are excellent in mechanical strength and weather resistance of the film.

In coating the white adsorptive / decomposable layer containing the titanium oxide and the inorganic adsorbent according to the present invention, if the surface of the support is inferior in water wettability, the white adsorbent / decomposable layer may be coated at the time of preparing the coating liquid. Before using a suitable surfactant or organic solvent, or applying a white adsorbing / decomposing layer, the surface of the support is treated with corona, glow discharge, flame, plasma, electron beam, and far ultraviolet. , Ozone treatment,
It is preferable to perform a physical and chemical treatment with a surfactant or the like to improve the water wettability of the support surface.

The adsorptive / decomposable light-reflecting sheet of the present invention comprises titanium oxide and an inorganic adsorbent provided on a flexible support using an inorganic binder. Polyolefin resin such as polypropylene and TPX, polyester resin, polyamide resin, polyvinyl acetate, styrene-vinyl acetate copolymer resin, acrylic resin, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl ether, polyvinyl ketone, polyether, polyvinyl Synthetic resin materials such as alcohol-based resins, diene-based resins, and polyurethane-based resins can be used. These synthetic resin materials may be used as they are, or may be used as a blend. Alternatively, a pigment may be kneaded and used, for example, as a white plastic sheet.

However, it should be particularly noted in the present invention that the adsorptive / decomposable light-reflective sheet of the present invention is provided with a pressure-sensitive adhesive layer which can be peelably adhered to the back surface, so that the photoreaction on the white adsorbable / decomposable layer side This means that the product (reactive species) must not migrate to the backside. Naturally, the flexible support made of the above synthetic resin is a polymer material having an amorphous region more or less, and since the active species is often in a shape close to a gas, it is dissolved in the polymer. Can spread / move,
After a very long time (for example, 10 years), the pressure-sensitive adhesive layer may be affected by the active species, but at least the shape of the substance serving as the support of the adsorptive / decomposable light reflecting sheet of the present invention is Actively breathable shapes, ie recycled and semi-synthetic fibers such as synthetic resin fibers, natural fibers, rayon fibers and acetate fibers, activated carbon fibers, inorganic fibers such as glass fibers and alumina fibers, metal fibers such as stainless steel fibers, etc. It should not be a nonwoven fabric made of, or a material that has been subjected to a treatment such as porosity.

The thickness of the white adsorbing / decomposing layer containing titanium oxide and the inorganic adsorbent depends on the light efficiency, whiteness, coating strength, flexibility, particle size of titanium oxide, the inorganic adsorbent and other contained particles. Although it is determined and there is no particular limitation, it is preferably in the range of 1 to 100 μm under the condition that a sufficient amount of titanium oxide and an inorganic adsorbent is contained and that there is no economic disadvantage. If the thickness of the white adsorption decomposition layer is smaller than this range, the content of titanium oxide and the inorganic adsorbent becomes insufficient, and the adsorption resolution of harmful substances becomes poor, or the coating strength is small, It may not be practical. On the other hand, if the thickness is larger than this range, the light may not reach the lower part of the layer and may be wasted, or the flexibility required for the adsorptive / decomposable light reflecting sheet may be lost and the sheet may be difficult to handle.

In coating the white adsorption-decomposition layer containing titanium oxide and an inorganic adsorbent on the flexible support of the present invention, various blade coaters, roll coaters, air knife coaters, bar coaters, rod blade coaters are used. , Short dwell coater, comma coater,
Various coating devices such as a die coater, a reverse roll coater, a kiss coater, a dip coater, a curtain coater, an extrusion coater, a glare coater, a microgravure coater, and a size press can be used. After coating, machine calendar,
Flattening and polishing may be performed using a calendar such as a TG calendar, a super calendar, or a soft calendar, or molding may be performed using an embossing device.

In the present invention, the flexible support can be peelably adhered (removable) to the surface opposite to the coated surface of the white adsorption / decomposition layer containing titanium oxide and the inorganic adsorbent. It is characterized by providing an adhesive layer. In order to function effectively as a removable adhesive, the adhesive (anchoring property) between the support and the adhesive is strong, while the cohesive force of the adhesive is strong and the adhesive between the adherend and the adhesive The property that adhesiveness is weak is required. Among these required properties, a dilemma is that the molecular weight of the pressure-sensitive adhesive polymer is preferably low in order to improve the anchoring property, and conversely, the molecular weight of the pressure-sensitive adhesive polymer is preferably high in order to satisfy the other two. There is, for example, a two-component re-peelable pressure-sensitive adhesive as a means for clearing this. This is to adjust the adhesive force between the pressure-sensitive adhesive and the adherend by securing the anchoring property to the support with a low-molecular-weight pressure-sensitive adhesive polymer as the main agent, and then crosslinking the polymer with a suitable cross-linking agent to increase the molecular weight. Generally, an acrylic copolymer resin or the like is used as a main agent, and an epoxy resin or the like is used as a cross-linking agent. Alternatively, a functional group that adjusts the adhesive force with the adherend by the physical socket effect of the microsphere adhesive or relaxes the electric coupling between the adherend and the adhesive caused by the surface polarity of the adhesive is used. There is also a method of adjusting the adhesive force by copolymerizing with an adhesive.

The adsorptive / decomposable light reflecting sheet according to the second aspect of the present invention comprises a white adsorptive / decomposable layer containing at least titanium oxide and an inorganic adsorbent, a non-permeable flexible support, a barrier layer, and a peelable layer. It is composed of an adhesive layer that can be bonded. In the present invention, the photoreaction product (reactive species) on the white adsorptive / decomposition layer side reaches the support and causes deterioration of the pressure-sensitive adhesive layer provided on the support surface opposite to the white adsorptive / decomposable layer side. For the purpose of preventing, the use of an air-impermeable support as described above is characterized by the provision of a barrier layer containing no titanium oxide between the support and the white adsorptive decomposition layer, thereby providing an adhesive layer. Not only can the deterioration of the support be further suppressed, but also the deterioration of the support itself can be suppressed. The component constituting the barrier layer contains the above-mentioned inorganic binder as a main component, and may contain an inorganic adsorbent or an inorganic pigment. The thickness of the barrier layer is not particularly limited, but is preferably in the range of 1 to 100 μm and used within a range that does not impair the flexibility of the support.

The adsorptive / decomposable light reflecting sheet according to the third invention contains a white adsorptive / decomposable layer containing at least titanium oxide and an inorganic adsorbent, a flexible support having no air permeability, and an ultraviolet absorber. It is composed of a protective layer and a pressure-sensitive adhesive layer that can be peelably bonded. In the present invention, not only the degradation of the support due to dissolution / diffusion / migration of the photoreaction product (reactive species) into the support is prevented, but also an ultraviolet absorber is provided between the support and the white adsorptive decomposition layer. By providing the protective layer, the deterioration of the support due to ultraviolet rays generated from a light source such as a fluorescent lamp and a chemical reaction caused by the ultraviolet rays is prevented. As the component constituting the protective layer, the aforementioned inorganic binder is used as a main component, and the following substances can be mixed and used at an appropriate concentration as an ultraviolet absorber.

The ultraviolet absorber used in the present invention is 300
A material that absorbs ultraviolet light of about 400 μm and re-radiates the absorbed energy as heat energy, and may be any material that is generally used as an ultraviolet absorbent, and specific examples include the following. ,
It is not limited to these.

Examples of the salicylic acid-based ultraviolet absorber include phenyl salicylate, p-tert-butylphenyl salicylate, p-octylphenyl salicylate and the like.

As a benzophenone ultraviolet absorber,
2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-
Octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2'-dihydroxy-
4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone, bis (2-methoxy-4-hydroxy-5-benzoylphenyl) methane and the like .

As a benzotriazole type ultraviolet absorber, 2- (2'-hydroxy-5'-methylphenyl)
Benzotriazole, 2- (2'-hydroxy-5'-
tert-butylphenyl) benzotriazole, 2-
(2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) benzotriazole, 2- (2′-hydroxy-3′-tert-butyl-5′-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3', 5'-di-tert-amylphenyl) benzo Triazole, 2- (2'-hydroxy-
4'-octoxyphenyl) benzotriazole, 2-
[2'-hydroxy-3 '-(3 ", 4", 5 ", 6"
-Tetrahydrophthalimidomethyl) -5'-methylphenyl] benzotriazole, 2,2'-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6
-(2H-benzotriazol-2-yl) phenol] and the like.

As cyanoacrylate-based ultraviolet absorbers, 2-ethylhexyl-2-cyano-3,3'-diphenylacrylate, ethyl-2-cyano-3,3'-
Diphenyl acrylate and the like.

These can be used alone,
Two or more kinds can be used in combination.

The protective layer containing the ultraviolet absorbent may be applied to the support before applying the white adsorption / decomposition layer containing titanium oxide and the inorganic adsorbent, or may be applied using a multilayer coating coater. It may be coated on the support at the same time as the white adsorption decomposition layer.

As described above, in the present invention, in order to prevent the deterioration of the support and the pressure-sensitive adhesive layer due to the movement of the photoreaction product (reactive species) on the white adsorption / decomposition layer side to the support, A barrier layer or a protective layer can be provided between the body and the white adsorption / decomposition layer. However, a single metal (aluminum, silver, etc.) can be provided by vapor deposition or ion plating, or a metal foil can be placed on the white adsorption / decomposition layer. Is effective in preventing the deterioration of the support and the peelable pressure-sensitive adhesive layer, but the adhesion with the white adsorption decomposition layer composed of titanium oxide, an inorganic adsorbent and an inorganic binder. In some cases, the metal layer is not provided because the white adsorbed and decomposed layer may peel off or fall off due to long-term exposure to light.

The fourth aspect of the present invention provides a light-adsorbing / decomposing light-reflective sheet comprising a white adsorbing / decomposing layer containing at least titanium oxide and an inorganic adsorbent, a gas-permeable top coat layer, and a non-air-permeable flexible support. And a pressure-sensitive adhesive layer that can be peelably bonded. The air-permeable top coat layer present on the surface of the adsorptive / decomposable light-reflective sheet of the present invention substantially eliminates the antifouling and deodorizing effect of the adsorptive / decomposable light-reflective sheet of the present invention, and the abrasion resistance of the white adsorptive / decomposable layer is reduced. In addition to improving the performance, the utility as a light reflecting sheet is improved, and the life as a light reflecting sheet is also improved. As a material for forming the air-permeable top coat layer, colloidal silica, colloidal alumina and the like are preferable, and the above-mentioned inorganic binder can be mixed and used as necessary. If the thickness of the top coat layer is unnecessarily large, the antifouling and deodorizing effect of the white adsorbing and decomposing layer is impaired. Therefore, it is desirable that the thickness be as thin as possible within a range where the abrasion resistance can be satisfied, and preferably 5 μm or less.

When a lighting device or a blind equipped with the adsorptive / decomposable light reflecting sheet of the present invention is used, the lighting device or the blind itself is less likely to be contaminated with contaminants or the like due to the excellent photocatalytic ability of titanium oxide in the white adsorptive / decomposable layer. Not only that, the odors and bacteria around the lighting device and the blinds were decomposed, and it was revealed that they had excellent deodorizing and antibacterial properties.

Furthermore, due to the excellent adsorption ability of the inorganic adsorbent in the white adsorption / decomposition layer, contamination by the adsorbent can be achieved even when the light source such as a fluorescent lamp is turned off, even in a dark place, or at night, even when the amount of ultraviolet light is small. It has been found that not only can harmful substances such as substances, bad smells, and bacteria be adsorbed and removed, but also the photodecomposition reaction by titanium oxide when the light source is turned on can be made more efficient.

The illumination light source used in the illumination device using the adsorptive / decomposable light reflecting sheet of the present invention includes a fluorescent lamp, a halogen bulb, HID, TLT, a mercury lamp, a black light,
All light sources used for general lighting devices such as insect traps, color fluorescent lamps, incandescent lamps, and germicidal lamps can be used. Naturally, in the lighting device using the adsorptive / decomposable light reflecting sheet having the antifouling / deodorizing effect of the present invention, since the antifouling / deodorizing performance is exhibited by light, the adsorptive / decomposable light is exhibited even when the light source is turned off. Under the condition that the lighting device using the reflection sheet is exposed to sunlight or light from another lighting device or the like, it is possible to carry out light-proof soiling and deodorization.

As a method of positively using sunlight, there is a method of using the adsorptive / decomposable light reflecting sheet of the present invention for a blind mounted on a window. By using the adsorptive and decomposable light reflecting sheet of the present invention for a blind, not only can sunlight be used for antifouling and deodorization, but it is also possible to control the penetration of sunlight into a room if necessary. It is possible. As the type of blind, any type such as a vertical blind, a horizontal blind, and a roll-shaped blind can be used, and the material of the blind as the object to be bonded may be any material such as a synthetic resin plate or a painted metal plate.

The adsorptive / decomposable light-reflective sheet carrying the titanium oxide and the inorganic adsorbent of the present invention can be used by attaching it to an ordinary reflector or a blind, or a processing form used for an ordinary reflector or a blind. Can all be used. That is, any processing method such as a method in which the adsorptive / decomposable light reflecting sheet is directly adhered to a reflecting plate or a blind, a method in which the sheet is folded and folded, or a method in which the sheet is embossed may be used. In addition, it may be used by penetrating through the adsorptive / decomposable light reflection sheet.

The adsorptive / decomposable light reflecting sheet of the present invention has a white adsorptive / decomposable layer containing at least titanium oxide and an inorganic adsorbent on a non-permeable flexible support, and the opposite surface of the support. It is an adsorption-decomposable light reflection sheet provided with a pressure-sensitive adhesive layer that can be peelably adhered to a light source, and can be used by being attached to a reflection plate or a blind of an existing lighting fixture. In particular, in a lighting device using the adsorptive / decomposable light reflecting sheet, not only does the excellent antifouling effect maintain the light reflection efficiency for a long period of time, but also, while being used as a lighting device, odorous substances such as tobacco and bacteria. Harmful substances can be decomposed, and the surrounding environment can be maintained well.

The reflectance of the adsorptive / decomposable light reflecting sheet used in the present invention is preferably 50 or more, particularly when used as a reflector of a lighting device. The reflectance referred to here is a diffuse reflectance, which is JIS Z87.
It is a value of diffuse reflectance (%) measured according to No. 22. If the reflectivity is less than 50, the reflectivity of light from the light source is reduced, and not only the function as a reflector is reduced, but also the reflection of light is reduced, so that efficient photocatalyst antifouling cannot be performed.

[0055]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto unless it exceeds the gist of the present invention.

Preliminary operation 1 As a flexible support having no air permeability, a support prepared by processing a peelable acrylic adhesive on a soft transparent glossy PVC film (80 μm) (manufactured by Dainippon Ink and Chemicals, Inc.) Softafac Soft Transparent 80 AER) was used. In order to provide a white adsorption / decomposition layer on the surface of the support, a corona treatment was performed in advance, and when the white adsorption / decomposition layer was applied, a release paper was adhered to the back surface and used. This support was designated as support 1.

Preliminary Operation 2 As a flexible support having no air permeability used in the examples, a support prepared by processing a peelable acrylic adhesive on a soft white PVC film (80 μm) (manufactured by Dainippon Ink and Chemicals, Inc.) Softak soft white erase 80 AER) was used. In order to provide a white adsorption / decomposition layer on the surface of the support, a corona treatment was performed in advance, and when the white adsorption / decomposition layer was applied, a release paper was adhered to the back surface and used. This support was designated as support 2.

Example 1 As a photocatalyst, titanium oxide (P25, manufactured by Nippon Aerosil Co., Ltd.)
30% by weight of S6), 30% by weight of a composite phyllosilicate (Mizukanite AP, manufactured by Mizusawa Chemical Industries) as an inorganic adsorbent, and 40% by weight of synthetic smectite (Smecton SA, manufactured by Kunimine Industries) as an inorganic binder. The resulting white adsorptive / decomposable layer was applied to the support 1 so as to have a thickness of 10 μm, dried, and then subjected to a calendering treatment to obtain a removable adsorptive / decomposable light reflecting sheet of Example 1.

Example 2 As a photocatalyst, titanium oxide (manufactured by Nippon Aerosil, P25
S6) of 30% by weight, as an inorganic adsorbent, 30% by weight of a synthetic adsorbent (Kyowa Chemical Co., Ltd., Kyoward 600), and as an inorganic binder, 40% by weight of synthetic smectite (Smecton SA, manufactured by Kunimine Industries). The resulting white adsorptive / decomposable layer was applied on the support 2 so as to have a thickness of 10 μm, dried, and then calendered to obtain a replaceable adsorptive / decomposable light reflecting sheet of Example 2.

Example 3 As a photocatalyst, titanium oxide (manufactured by Nippon Aerosil, P25
30% by weight of S6), 30% by weight of synthetic zeolite (Zeoram F-9, manufactured by Tosoh Corporation) as an inorganic adsorbent, and synthetic smectite (manufactured by Kunimine Industries, Ltd.) as an inorganic binder.
A white adsorption / decomposition layer containing 40% by weight of Smecton SA) is coated on the support 2 so as to have a thickness of 10 μm;
After drying, the sheet was subjected to a calendering treatment to obtain a removable adsorption-decomposable light reflecting sheet of Example 3.

Example 4 A coating layer of synthetic smectite (Smecton SA, manufactured by Kunimine Industries) was formed as a barrier layer on the surface of the support 1 by 5 μm.
30% by weight of titanium oxide (P25S6, manufactured by Nippon Aerosil) as a photocatalyst, 30% by weight of a composite phyllosilicate (Mizukanite AP, manufactured by Mizusawa Chemical Industries) as an inorganic adsorbent, and an inorganic binder As
Synthetic smectite (manufactured by Kunimine Industries, Smecton SA)
Was applied to a thickness of 5 μm and dried, and then calendered to obtain a replaceable adsorptive / decomposable light reflecting sheet of Example 4.

Example 5 As a protective layer on the surface of the support 2, 2-hydroxy-4-
A coating layer of synthetic smectite (Smecton SA, manufactured by Kunimine Industries) containing 5% by weight of octoxybenzophenone was provided with a thickness of 5 μm, and 30% by weight of titanium oxide (P25S6, manufactured by Nippon Aerosil) as a photocatalyst,
A white adsorption decomposition layer containing 30% by weight of a composite phyllosilicate (Mizukanite AP, manufactured by Mizusawa Chemical Industries) as an inorganic adsorbent and 40% by weight of synthetic smectite (Smecton SA, manufactured by Kunimine Industries) as an inorganic binder. 5
After coating and drying so as to have a thickness of μm, a calendering treatment was carried out to obtain a removable adsorption-decomposable light reflecting sheet of Example 5.

Example 6 70% by weight of colloidal silica (manufactured by Nissan Chemical Industries, Snowtex-AK) and synthetic smectite (manufactured by Kunimine Industries, Smecton) were placed on the surface of the releasable adsorptive / decomposable light reflecting sheet described in Example 1. An air-permeable top coat layer containing 30% by weight of SA) was provided in a thickness of 2 μm to obtain a removable adsorption-decomposable light reflecting sheet of Example 6.

Example 7 70% by weight of colloidal alumina (catalyst AS-2, manufactured by Kasei Kagaku Kogyo Co., Ltd.) and synthetic smectite (Smecton, manufactured by Kunimine Kogyo Co., Ltd.) An air-permeable top coat layer containing 30% by weight of SA) was provided with a thickness of 2 μm to obtain a replaceable adsorptive decomposable light reflecting sheet of Example 7.

Each of the releasable adsorptive and decomposable light reflecting sheets obtained in the above examples has a reflectance of 50% or more, and can exhibit adhesiveness by removing the release paper. It was possible to adhere to reflective plates, blinds, etc. Further, if necessary, the repositionable adsorptive / decomposable light reflecting sheet could be removed again, and at that time, the adhesive did not remain on the reflecting plate.

Comparative Example 1 A replaceable light reflecting sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that the composite phyllosilicate as an inorganic adsorbent was not contained.

Comparative Example 2 A replaceable light reflecting sheet of Comparative Example 2 was obtained in the same manner as in Example 2 except that the synthetic adsorbent which was an inorganic adsorbent was not contained.

Comparative Example 3 A replaceable light reflecting sheet of Comparative Example 3 was obtained in the same manner as in Example 3 except that synthetic zeolite as an inorganic adsorbent was not contained.

Comparative Example 4 A replaceable light reflecting sheet of Comparative Example 4 was obtained in the same manner as in Example 4, except that the composite phyllosilicate as an inorganic adsorbent was not contained.

Comparative Example 5 A replaceable light reflecting sheet of Comparative Example 5 was obtained in the same manner as in Example 5, except that the composite phyllosilicate as an inorganic adsorbent was not contained.

Comparative Example 6 A replaceable light reflecting sheet of Comparative Example 6 was obtained in the same manner as in Example 6, except that the composite phyllosilicate as an inorganic adsorbent was not contained.

Comparative Example 7 A replaceable light reflecting sheet of Comparative Example 7 was obtained in the same manner as in Example 7, except that the composite phyllosilicate as an inorganic adsorbent was not contained.

Comparative Example 8 A polyester film (manufactured by Teijin, thickness: 50 μm) was used as a flexible support having no air permeability, and an acrylic pressure-sensitive adhesive (AE230, manufactured by Nippon Synthetic Rubber) was used on the support.
Was provided in a thickness of 10 μm, and a release paper was adhered to protect the pressure-sensitive adhesive layer. After subjecting the surface opposite to the adhesive layer to corona treatment, 30% by weight of titanium oxide (manufactured by Nippon Aerosil, P25S6) as a photocatalyst, and a composite phyllosilicate (manufactured by Mizusawa Chemical Industries, Ltd.) as an inorganic adsorbent , Mizucanite AP), and a white adsorptive / decomposable layer containing 40% by weight of synthetic smectite (Smecton SA, manufactured by Kunimine Industries) as an inorganic binder, applied to a thickness of 10 μm, dried, and then calendered. Was performed to obtain a light reflecting sheet of Comparative Example 8.

COMPARATIVE EXAMPLE 9 A soft transparent glossy PVC film (80 μm) coated with a peelable acrylic pressure-sensitive adhesive was used alone as a support (manufactured by Dainippon Ink and Chemicals, Softak Soft Transparent 80AER). It was made to be a replaceable light reflection sheet.

Comparative Example 10 A support prepared by processing a peelable acrylic adhesive on a soft white PVC film (80 μm) (manufactured by Dainippon Ink and Chemicals, Inc.)
The soft-reflective light-reflective sheet of Comparative Example 10 was obtained by using Softac Soft White Eraser 80AER alone.

The light reflecting sheet obtained in each of the examples and the comparative examples was attached to a reflecting plate of a commercially available 20 W fluorescent lamp to obtain a lighting device for testing.

The light reflecting sheets obtained in Examples and Comparative Examples were attached to commercially available horizontal blinds to make blinds for testing.

The lighting devices and blinds obtained in Examples and Comparative Examples were tested by the following methods.
The results are shown in Table 1.

[Anti-fouling property 1] The test of the anti-fouling property 1 was performed as follows. First, prior to the test of antifouling property 1, the color difference of the light reflection sheet was measured by a color difference meter (Lab type, manufactured by Minolta). Next, in a closed container of 0.1 m ³ , one illuminating device equipped with the light reflecting sheet of each of Examples and Comparative Examples was installed, and smoke for 10 cigarettes (mild seven) was pumped using a pump. Introduced within. Take out the lighting device, measure the color difference of the light reflection sheet immediately after the introduction of tobacco smoke with a color difference meter, return the lighting device in the container and turn on the fluorescent lamp for 50 hours,
The color difference of the light reflecting sheet after lighting was measured with a color difference meter. Among the measured values of the color difference meter of each light reflection sheet, the antifouling property was determined based on a change in the b value indicating yellowishness. That is, the b value of the light reflection sheet before the test of the antifouling property 1 is b0, the b value of the light reflection sheet immediately after the introduction of cigarette smoke is b1, the b value of the light reflection sheet after lighting the fluorescent lamp for 50 hours is b2, When the contamination load from b0 to b1 was given, the extent to which the contamination load was removed at the time of b2 was displayed in percentage. When the value is 0%, the contamination load is not reduced at all, and when the value is 100%, the contamination load is completely removed. However, when the value exceeds 100% or becomes smaller than 0%, they are indicated as 100% and 0%, respectively, for convenience.

[Stain resistance 2] The stain resistance test 2 was performed as follows. One lighting device equipped with the light reflecting sheet of each of Examples and Comparative Examples was installed in a 0.1 m ³ closed container, and smoke for 10 cigarettes (mild seven) was introduced into the container using a pump. . After taking out the lighting device and measuring the color difference of the light reflecting sheet immediately after introducing the cigarette smoke with a color difference meter, returning the lighting device into the container and turning on the fluorescent lamp without turning on the fluorescent lamp.
After leaving for 0 hour, the color difference of the light reflection sheet was measured again by a color difference meter. The stain resistance was determined by the variation rate of the b-value of the color difference meter in each light reflection sheet as in the determination of stain resistance 1.

[Fouling resistance 3] After the test for [fouling resistance 2], the fluorescent lamp was turned on for 50 hours, and the color difference of the light reflecting sheet was measured again. The stain resistance was determined by the variation rate of the b-value of the color difference meter in each light reflection sheet as in the determination of stain resistance 1.

[Anti-fouling property 4] An anti-fouling property 4 test was conducted as follows. One blind each equipped with the light reflection sheet of the example and the comparative example was installed in a 0.1 m ³ closed container, and smoke for 10 cigarettes (mild seven) was introduced using a pump. After taking out the blinds and measuring the color difference of the light reflection sheet immediately after introducing the cigarette smoke with a color difference meter, return the blinds into the container and turn on the fluorescent lamps used for antifouling properties 1 to 3 for 50 hours, and light reflection after lighting. The color difference of the sheet was measured with a color difference meter. The stain resistance was determined by the variation rate of the b-value of the color difference meter in each light reflection sheet as in the determination of stain resistance 1.

[Deodorizing property 1] The test of deodorizing property 1 was performed as follows. Each of the lighting devices equipped with the light reflecting sheets of the examples and the comparative examples was installed in a closed container of 0.1 m ³ , and acetaldehyde, one of the main components of the tobacco odor, was sealed at an initial concentration of 10 ppm. Thereafter, the fluorescent lamp was turned on.
The acetaldehyde concentration (C20) in the container 20 minutes after the start of the test was measured by gas chromatography, and the C2 concentration was measured.
Excellent deodorization when 0 <2 ppm, 2 ppm ≦ C20 ≦
Good deodorization when 5 ppm, 5 ppm <C20 ≦ 7p
In the case of pm, the deodorizing properties were average, and in the case of C20> 7 ppm, the deodorizing properties were inferior.

[Deodorizing property 2] The test for deodorizing property 2 was performed as follows. Each of the lighting devices equipped with the light reflecting sheets of the examples and the comparative examples was installed in a closed container of 0.1 m ³ , and acetaldehyde, one of the main components of the tobacco odor, was sealed at an initial concentration of 10 ppm. Then, after leaving it for 20 minutes without turning on a fluorescent lamp, the acetaldehyde concentration (C20) in the container was measured by gas chromatography. The deodorizing property was determined based on the value of C20 as in the case of the deodorizing property 1.

[Deodorizing property 3] After the test of [Deodorizing property 2], the fluorescent lamp was turned on for 20 minutes, and the acetaldehyde concentration (C20) in the container was measured. The deodorizing property was determined based on the value of C20 as in the case of the deodorizing property 1.

[Illumination] The illumination devices equipped with the light reflecting sheets of the examples and comparative examples were turned on, and the illumination effect was visually determined. When the book was sufficiently bright enough to be read at a distance of 50 cm from the light source, the illuminance was excellent. When the book was slightly dark, the illuminance was comparable. When the book was hard to read, the illuminability was poor.

[Removability] The light reflecting sheet was peeled off from the lighting device used in [Stain resistance 3]. The light-reflective sheet can be peeled off without resistance and the adhesive is excellent when the adhesive does not remain on the base material.The peelability is the same when the adhesive has peeling resistance but no adhesive remains. When the adhesive remained and soiled the substrate after the test, the removability was evaluated as poor. When the light reflection sheet is used with the replacement in mind, the replacement is possible if the removability is excellent or normal, but if the light reflection sheet is inferior, the light reflection sheet cannot be replaced when the light reflection sheet is damaged.

[Scratch Resistance] The surfaces of the light reflecting sheets obtained in Examples and Comparative Examples were rubbed with a cotton swab to observe the abrasion resistance.
When the surface is scratched by rubbing less than 50 reciprocations, the abrasion resistance is poor. When the surface is scratched by 50 to 199 reciprocating rubs, the abrasion resistance is average. When the surface was scratched, the abrasion resistance was determined to be good, and when the surface was scratched or no scratch was generated more times, the abrasion resistance was determined to be excellent.

[Durability] The light-reflecting sheets obtained in the examples and comparative examples were cut into 2 cm square pieces to form one piece, and 100 pieces were stuck on a reflector plate of a commercially available 20 W fluorescent lamp and used for a durability test. A one-year exposure test was performed while replacing the fluorescent lamp every month with an illumination device. Compare the light reflection sheet before and after exposure, the adhesion between the reflection plate and the light reflection sheet,
The state of the coating layer on the light reflection sheet surface (white adsorption decomposition layer and the like) was observed. The durability was determined by the sum of the number of pieces where the light reflecting sheet was peeled off from the reflecting plate and the number of pieces where the coating layer on the light reflecting sheet surface was peeled off. When the sum is 0, the durability is excellent, and when the sum is 1 to 2, the durability is good.
５5 were judged as having poor durability, 6 to 10 were judged as having poor durability, and 11 or more were judged as having poor durability.

[Antibacterial property] The lighting apparatus equipped with the light reflecting sheet obtained in each of the examples and comparative examples was heated at a temperature of 36 ° C and a humidity of 8
0% environment, Pseudomonas aeruginosa (10
(A level of 100,000 cells). Cover the agar medium with a quartz glass Petri dish so that it does not dry,
Five hours after turning on the fluorescent lamp, the propagation state of Pseudomonas aeruginosa on the agar medium was observed. When the number of surviving bacteria is 10 or less (observation lower limit), the antibacterial property is excellent. When the number of surviving bacteria is more than 10 and up to 100, the antibacterial property is good.
Good antibacterial properties up to 1 and more than 1000 viable bacteria 1
The antibacterial properties were determined to be inferior to up to 10,000 cells, and the antibacterial properties were poor when the number of surviving bacteria was 10,000 or more.

Tables 1 and 2 show the results of the above test items.

[0092]

[Table 1]

[0093]

[Table 2]

The light-reflecting sheets of Examples 1 to 7 exhibited good results for all evaluation items, and not only satisfied the various characteristics required for the replaceable light-reflecting sheet, but also exhibited excellent antifouling properties. -It also has deodorizing and antibacterial properties. In particular, regarding the deodorizing performance, when compared with the light reflecting sheets of Comparative Examples 1 to 7 which do not contain the inorganic adsorbent, not only when the fluorescent lamp is turned off, but also when the fluorescent lamp is turned on, more excellent characteristics are obtained. Had.

Further, the light reflecting sheets of Comparative Examples 9 and 10 which were not provided with the white adsorbing / decomposing layer containing titanium oxide and the inorganic adsorbent had no antifouling / deodorizing / antibacterial effects, and had removability and good removability. There was no particular effect on durability. This result suggests that the presence of the white adsorbed and decomposed layer is involved in the development of antifouling, deodorizing, and antibacterial effects, and in the reduction of removability and durability. Therefore, in the light reflecting sheet of the embodiment, while effectively utilizing the antifouling, deodorizing, and antibacterial effects of the white adsorbing and decomposing layer, the adhesion of the photoreaction product (reactive species) in the white adsorbing and decomposing layer to the support body It can be seen that the deterioration of removability and durability due to dissolution / diffusion / migration in the agent layer is successfully suppressed. In addition, the light reflection sheet of Comparative Example 8 had a strong adhesive force of the pressure-sensitive adhesive layer, and was inferior in removability.

[0096]

As described above, the adsorptive / decomposable light reflecting sheet of the present invention has a white adsorptive / decomposable layer containing at least titanium oxide and an inorganic adsorbent on a non-permeable flexible support. An adsorption-decomposable light-reflective sheet provided with an adhesive layer that can be peelably adhered to the opposite surface of the support, and can be used by being attached to a reflector or a blind of an existing lighting device. In particular, the lighting device using the adsorptive / decomposable light reflecting sheet has not only an excellent antifouling and deodorizing effect due to the double effect of the photocatalytic ability of titanium oxide and the adsorbing ability of the inorganic adsorbent, but also as long as light is irradiated Because the antifouling and deodorizing action lasts for a long time, it is preferably used for reflectors such as fluorescent lamps that often have a chance of sticking tobacco tar and cooking oil, etc. It is also possible to keep. Furthermore, the adsorptive / decomposable light reflecting sheet of the present invention can be structurally replaced, and an adherend such as a reflection plate is not stained with an adhesive, or is not peeled off from the adherend. It is easy to handle because it is not necessary to forcibly wipe off dirt attached like a reflection plate. In addition, since the adsorptive and decomposable light reflection sheet is used above the light source, convection due to the heat generated by the light source enables efficient light pollution, deodorization and antibacterial of the surrounding environment, and its industrial value is extremely high. It is.

Claims (7)

[Claims] 1. A white adsorption / decomposition layer containing titanium oxide and an inorganic adsorbent is provided on a flexible support having no air permeability, and a pressure-sensitive adhesive layer capable of being peelably adhered is provided on the opposite surface of the support. A repositionable adsorptive and decomposable light reflecting sheet having an antifouling and deodorizing effect. 2. A pressure-sensitive adhesive which is provided with a barrier layer, a white adsorbing / decomposing layer containing titanium oxide and an inorganic adsorbent in order on a non-permeable flexible support, and which can be peelably adhered to the opposite surface of the support. 1. A replaceable adsorptive and decomposable light reflecting sheet having an antifouling and deodorizing effect, characterized by comprising an agent layer. 3. A protective layer containing an ultraviolet absorber and a white adsorption-decomposition layer containing titanium oxide and an inorganic adsorbent are sequentially provided on a non-permeable flexible support, and on the opposite surface of the support, A replaceable adsorptive and decomposable light reflecting sheet having an antifouling and deodorizing effect, comprising a peelable adhesive layer. 4. A pressure-sensitive adhesive layer having a white adsorption-decomposition layer containing at least titanium oxide and an inorganic adsorbent on a non-permeable air-permeable flexible support, and capable of being peelably bonded to the opposite surface of the support. A removable adsorbent-decomposable light-reflective sheet having an antifouling and deodorizing effect, wherein a removable top-coat layer is provided on the white adsorbent-decomposable layer. . 5. A pressure-sensitive adhesive layer having a white adsorption-decomposition layer containing at least titanium oxide and an inorganic adsorbent on a non-permeable flexible support, and capable of being peelably adhered to the opposite surface of the support. A replaceable adsorptive / decomposable light reflecting sheet having an antifouling / deodorizing effect, wherein the adhesive sheet has a reflectance of 50 or more. 6. An illuminating device provided with a releasable adsorption-decomposable light reflecting sheet having an antifouling and deodorizing effect according to claim 1 around a light source. 7. A blind equipped with a releasable adsorptive and decomposable light reflecting sheet having an antifouling and deodorizing effect according to claim 1.