JP4827031B2 - Photocatalyst processing sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processed sheet having a high function by supplying a sheet with an additional function, and new technology of dyeing. <P>SOLUTION: For a photocatalyst to exert sufficient performance, the photocatalyst-processed sheet has a laminate of a binder layer containing a binder and then a photocatalyst layer containing photocatalyst particles overlying a sheet in this order. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  The present invention aims to produce an advanced product by adding an additional function to a sheet-like material, and further provides a new dyeing technique.

  A photocatalyst has the property of being excited by light and generating holes with oxidizing power. This oxidizing power is used for sterilization. Moreover, since the particles have a porous structure, they are applied to adsorbents. As a method of supporting such a photocatalyst having a photocatalytic action, for example, a coating agent containing titanium oxide is coated and dried by applying a treatment agent in which titanium oxide particles and a thermoplastic resin are dispersed in an organic solvent. There is a method of forming (for example, Patent Document 1).

In addition, in a photocatalyst product in which a photocatalyst is fixed on a base material by a binder resin, the photocatalyst is coated on the base material by spreading the photocatalyst powder on the resin while applying the binder resin and the applied resin is sticky. There is a method of fixing on top (for example, Patent Document 2).

Furthermore, when trying to add a deodorizing effect and a bactericidal effect for clothing, there are a method of kneading titanium oxide fine particles into a fiber material, or a method of dying a fiber or product in a photocatalyst-containing solution. (For example, patent document 3).

  However, these are applied to single color and plain dyeing, and have a problem of poor dyeability and design.

  Here, in the dip dyeing method and the kneading method, an adhesive (binder) such as an acrylic resin is used to support the particles. However, when the binder includes a part or the whole of the photocatalyst particles to produce a product, the photocatalyst particles cannot be brought into contact with the external environment, resulting in the inhibition of the photocatalytic activity of the photocatalyst.

When dyeing cloths and sheets using a print screen, it is necessary to increase the dyeing fastness in order to express various types of colors vividly from the viewpoint of design. For this reason, it is necessary to increase the concentration of the binder, and as a result, the photocatalytic activity tends to be further inhibited.

In addition, there are other fabrics that have been deodorized by applying a deodorant, but when the adsorption reaches a saturated state, the adsorbent itself has no regenerative ability, and thus has a problem of poor sustainability.

International Publication No. 01/048109 JP 2001-162172 A JP 2001-192927 A

  In order to overcome the problems of the photocatalyst processing, the present inventors have conducted extensive research and, as a result, ensured design, sustained deodorization and antibacterial effects, which are unprecedented photoactive processing sheets. The present invention has been conceived with the aim of providing the above. Furthermore, the present invention provides a photocatalyst processed sheet that responds to visible light that can exhibit photocatalytic activity even in an environment where only fluorescent lamps are used at night.

As an embodiment of the photocatalyst processed cloth according to the present invention, a photocatalyst processed cloth in which a binder layer containing a binder resin and a photocatalyst layer containing photocatalyst particles are laminated in this order on a cloth body,
The binder layer is formed by drying a raw material composition (I) containing a binder resin , a resin crosslinking agent, an emulsifier, a pigment, and water.
The photocatalyst layer is a photocatalyst processed cloth having washing resistance, wherein a raw material composition (II) containing photocatalyst particles, a dispersant, an antifoaming agent, a crosslinking agent for resin, an emulsifier, and water is dried .

  Here, the raw material composition (II) may contain photocatalytic particles selected from the group consisting of titanium oxide, zinc oxide, tungsten dioxide, niobium dioxide, and silicon oxide.

Moreover, raw material composition (II) may contain 3 to 30 weight% of titanium oxide particles.

Furthermore, the raw material composition (I) is a binder resin : 10 wt% to 30 wt%,
Crosslinker for resin: 0.5 wt% to 2.0 wt%,
Emulsifier: 2.0% to 3.0% by weight,
Pigment: 0.1% to 3.0% by weight,
Surfactant: 0.2% by weight to 1.0% by weight
Can be included.

In addition, the raw material composition (II) is at least titanium oxide particles: 3 wt% to 30 wt%,
Dispersant: 0.5% to 2.0% by weight,
Crosslinking agent for resin : 0.2% by weight to 1.0% by weight,
Antifoaming agent: 0.1% to 0.5% by weight,
Emulsifier: 2.0% to 3.0% by weight Surfactant: 0.2% to 1.0% by weight
May be included.

  The raw material composition (II) may further contain a foaming agent.

The method for producing a photocatalyst-processed cloth having wash resistance according to the present invention comprises preparing a raw material composition (I) containing at least a binder resin , a crosslinking agent for resin , an emulsifier, a pigment, and water;
Preparing a raw material composition (II) containing at least photocatalyst particles, a dispersant, an antifoaming agent, a crosslinking agent for resin, an emulsifier, and water;
Applying a raw material composition (I) containing a binder resin on the fabric;
Applying a raw material composition (II) containing photocatalytic particles;
Including a drying step and / or a heating step, and a binder layer containing a binder resin on the cloth body;
Photocatalyst layers containing photocatalyst particles can be laminated in this order.

The present invention is a photocatalyst processed sheet in which a binder layer containing a binder resin and a photocatalyst layer containing photocatalyst particles can be laminated in this order on the sheet, and by taking this configuration, the photocatalytic function of the photocatalyst particles has Deodorizing, sterilizing, antiviral, antifouling and other effects. In the present invention, various effects of such a photocatalyst can be supported on a sheet, the effects can be sufficiently exerted, and can be sustained over time. In particular, when titanium oxide is used as a photocatalyst, the above functions can be remarkably exhibited.

  The present invention provides a new dyeing technique for the purpose of adding a photocatalytic function to a sheet.

  The present invention is characterized by a paint used when a dye or a pigment is disposed on various sheet-like materials. The photocatalyst-processed sheet of the present invention forms a surface having a photocatalytic action with various kinds of sheet-like materials containing a dye or a pigment, and carries functions such as antibacterial and ultraviolet protection effects.

The photocatalyst processed sheet of the present invention has a three-layer structure of a sheet, a binder layer, and a photocatalyst layer. By using a three-layer structure, the photocatalytic action can be used effectively.

Hereinafter, the photocatalyst sheet of the present invention will be described together with the production method.

  In the present invention, the sheet used for the photocatalyst processed sheet is not particularly limited, and a cloth body made of natural fibers and / or artificial fibers, or a film or sheet made of a polymer material can be appropriately selected and used.

  Examples of natural fibers include cotton, hemp, silk, wool, and cashmere hair.

  Furthermore, examples of the artificial fibers include regenerated fibers such as rayon and acetate, and synthetic fibers such as polyester and nylon. It may be a fabric such as a human silk thread, sufu, viscose, or Bemberg, a fabric such as a knitted fabric or a non-woven fabric, or a natural or artificial polymer resin sheet or paper.

  Films or sheets made of polymer materials include polyurethane, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyamide, polyester, polyacetal, polysulfone, polyphenylene oxide, polybutadiene, polypropylene, cellophane, polychloroprene, polyamino acid, Examples thereof include a film or sheet formed of at least one polymer material selected from nitrile rubber, butyl rubber, and silicone rubber.

  The binder layer can be formed using the raw material composition (I) containing a binder resin. Moreover, a photocatalyst layer can be formed using raw material composition (II) containing a photocatalyst particle.

As the binder resin contained in the raw material composition (I) for forming the binder layer, known resins are used. For example, natural glue or natural resin such as gelatin, gum arabic, shellac, dammar, elemi, sandalac, etc. Kind;
Semi-synthetic pastes or semi-synthetic resins such as methyl cellulose, ethyl cellulose, nitrocellulose, carboxymethyl cellulose, acetate;
Isophthalic acid-based, terephthalic acid-based, bisphenol-based, vinyl ester-based polyester resin; acrylic copolymer resins such as ethylene-acrylic acid, ethylene-acrylic acid ester, acrylic ester-vinyl, and methacrylic acid ester-vinyl; Various isocyanate derivatives such as isocyanocyanate, 4,4′-diphenylmethane diisocyanate, lysine ester triisocyanate, various isocyanate derivatives and isocyanurate derivatives such as tolylene diisocyanate, polyester polyol, polyether polyol, Urethane resin consisting of reaction of various polyols such as acrylic loylol and phenolic polyol; halogenated polymers such as polyvinyl chloride and polyvinylidene chloride -Acetal resin such as polyvinyl acetate, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, polyacryl ester, polystyrene, polyvinyl acetal; polycarbonate resin; cellulose resin such as cellulose acetate; polyolefin resin Synthetic glues or synthetic resins such as amino resins such as urea resins, melamine resins and benzoguanamine resins;
Polysilicone resins such as polyalkylsiloxane, polyalkylhydrogensiloxane, polyalkylalkenylsiloxane, polyalkylsiliconate, polyalkalialkylsiliconate, polyalkylphenylsiloxane, epoxy modification, amino modification, urethane modification, alkyd modification, acrylic modification Silicone resins containing various modified products or copolymers such as
Or various fluororesins etc., such as polymers, such as tetrafluoroethylene or vinylidene fluoride, or a copolymer of these monomers and another kind monomer, are mentioned. In addition, you may use only these 1 type or may combine 2 or more types.

  Among these, a polyester resin, an acrylic resin, or a urethane resin is preferable because of good dye dyeing properties. From the viewpoint of heat resistance, adhesiveness, etc., it is preferable to use at least one selected from silicone resins or fluororesins.

In addition to the binder resin , various additives can be added to the raw material composition (I). For example, crosslinkers for resins, emulsifiers, thickeners, pigments or dyes, and other additives such as antioxidants, light stabilizers, antifoaming agents, flame retardants, flame retardants, water repellents, surfactants , Wetting agent, plasticizer, viscosity adjusting agent, drying adjusting agent, pH adjusting agent, dispersion stabilizer, insect repellent, fragrance, general dye pigment, fluorescent dye pigment, phosphorescent pigment, pearl pigment, thermochromic agent, photochromic agent, electro A chromic agent, liquid crystal, ultraviolet light emitting dye, metal powder such as gold powder, glass powder, or the like may be added. Zeolite may also be included. Zeolites can add an adsorption capacity function to the sheet of the present invention.

Among these, as a preferable blending ratio, binder resin : 10% by weight to 30% by weight, crosslinker for resin: 0.5% by weight to 2.0% by weight, emulsifier: 2.0% by weight to 3.0% by weight , Surfactant: It is preferable to contain 0.2% by weight to 1.0% by weight. The combination of these blend ratios can adjust the viscosity and viscosity of the binder layer.

  Along with the binder component, the above-mentioned various additives are selected, and an aqueous medium (water or a mixed solvent of water and an alcohol such as methanol or isopropanol or a ketone solvent such as acetone or water) or water is necessary. For example, a polymerization initiator or the like is mixed in a reaction vessel to prepare a raw material composition (I) for forming a binder layer.

  This raw material composition (I) is applied onto a sheet. As a coating method, various commonly used methods can be applied and are not particularly limited, and include a printing method and a transfer method. For the printing method, after preparing the above raw material composition (I), an aqueous or oily printing paste, a known printing method such as screen printing or rotary printing, or a known coating method such as knife coating method, screen coating method, rotary coating method, etc. With the coating method, the raw material composition (I) is applied to various fiber products during coating.

  In each of the above methods, the binder layer can be supported on the entire surface, a large area portion, or a partial or design pattern on the sheet. For printing, a photographic mold having a desired design may be used.

  The binder layer serves to fix the photocatalyst particles contained in the photocatalyst layer to be laminated next in a sheet form. The effect of fixing the photocatalyst particles allows the photocatalyst processed sheet of the present invention, which is a product, to continuously maintain the photocatalytic effect thereafter. The binder layer can carry a dye or a pigment, and gives a decorative effect by giving a color and a pattern to a sheet capable of carrying the binder layer and the photocatalyst layer.

  A photocatalyst layer containing photocatalyst particles is formed on the surface of the binder layer. This layer may be patterned using a photographic mold with the same design as the binder layer.

A photocatalyst layer is formed by apply | coating raw material composition (II). The raw material composition (II) containing photocatalyst particles basically contains a photocatalyst and does not contain a binder resin .

  The photocatalyst exhibits effects such as deodorization, sterilization, antiviral, antifouling and the like due to its photocatalytic function. The present invention provides a photocatalyst-processed sheet having a structure in which various effects of such a photocatalyst are supported on the sheet, the effects can be sufficiently exhibited, and can be sustained over time.

  Here, the “photocatalytic action” in the present invention refers to decomposition of harmful substances such as ammonia and aldehydes, antibacterial odor of tobacco, pet odor, antibacterial action against Staphylococcus aureus, Escherichia coli, etc. This refers to the antifouling action that is less likely to adhere to dirt and dirt.

  As the photocatalyst particles, a metal compound made of titanium oxide, zinc oxide, tungsten dioxide, niobium dioxide, silicon oxide, or the like is used. These compounds may be used in the form of supporting other organic compounds, metal compounds, metals and the like. Of these, when titanium oxide is used, the effects of deodorization, sterilization, antiviral and antifouling are remarkable.

In the present invention, “titanium oxide” refers to a material that includes titanium oxide as a compound and that supports various forms and other compounds in order to enhance the photocatalytic function to respond to light of a wide wavelength. , For example, titanium oxide powder, sol, slurry, coating agent, granulated product, supported product, and composite titanium oxide. The titanium oxide used in the present invention is preferably a visible light responsive type. Visible light-responsive titanium oxide can exhibit its performance even in an environment of only a fluorescent lamp at night with almost no ultraviolet rays.

  In the case of mixing titanium oxide particles, the particle size is preferably 1.0 μm to 20 μm from the viewpoint of workability when applied to a sheet as an ink and from the viewpoint of exerting a photocatalytic function.

  The raw material composition (II) capable of forming the photocatalyst layer may further contain chitosan and further a foaming agent.

  When the photocatalyst exerts a photocatalytic effect by light irradiation, chitosan exhibits these effects even in the dark, and thus can assist the function of the photocatalyst.

  The photocatalyst layer may further contain a foaming agent. The foaming agent is foamed by passing through a heating step after the photocatalyst layer is fixed to the sheet. The foaming agent generates bubbles when it is dried at a low temperature, and destroys the generated bubbles when it is dried at a high temperature. This phenomenon is important for causing the photocatalytic activity of the photocatalyst to appear. By concentrating the particles contained in the photocatalyst, and also the photocatalyst layer such as chitosan on the surface layer, and partially destroying the resin layer containing these particle surfaces, the particles are exposed to the outside atmosphere, Play a role that can function effectively. For this reason, when using a foaming agent, compared with the case where it does not use, it is possible to reduce the compounding ratio of the said highly functional photocatalyst particle and the other particle | grains which can be further added. Examples of the foaming agent include thermally expandable microcapsules.

  In the raw material composition (II), a dispersant is blended in order to prevent aggregation of the photocatalyst particles. Examples of the dispersant include calcium carbonate, calcium hydroxide, calcium phosphate, sodium hexametaphosphate, hydroxyapatite, and silica powder.

  The raw material composition (II) capable of forming the photocatalytic layer of the present invention may further contain various additives. For example, crosslinkers for resins, emulsifiers, thickeners, other additives such as antioxidants, light stabilizers, antifoaming agents, flame retardants, flame retardants, water repellents, surfactants, wetting agents, Examples thereof include a plasticizer, a viscosity adjuster, a drying adjuster, a pH adjuster, and a dispersion stabilizer.

As a blending ratio of preferable components of the raw material composition (II) capable of forming the photocatalyst layer, titanium oxide particles: 3% by weight to 30% by weight, dispersant: 0.5% by weight to 2.0% by weight, for resin Cross-linking agent: 0.2 wt% to 1.0 wt%, antifoaming agent: 0.1 wt% to 0.5 wt%, emulsifier: 2.0 wt% to 3.0 wt%, surfactant: 0 .2% to 1.0% by weight. By combining these blending ratios, the photocatalyst particles can be sufficiently dispersed, the compatibility of the photocatalyst layer and the binder layer can be improved, and the viscosity and viscosity can be adjusted.

  In addition to the above photocatalyst particles, various additives are further selected, and an aqueous medium (a mixed solvent of water or an alcohol such as methanol or isopropanol, or a water-miscible solvent of a ketone solvent such as acetone and water), or water is reacted. A raw material composition (II) containing photocatalyst particles is prepared by mixing in a container and adjusting the viscosity.

  This raw material composition (II) is apply | coated on the binder layer formed on the sheet | seat. The coating method may be the same as the method for forming the binder layer.

  The obtained raw material composition (II) may be printed together with the pattern of the binder layer.

  Thereafter, a drying process is performed to fix the printed ink. The drying temperature is 100 to 130 ° C.

  The range for printing the binder layer and photocatalyst layer may be the entire surface of the sheet, but it is printed with a design in which the part where the binder layer and photocatalyst layer are applied and the part where it is not applied are dispersed throughout the sheet. May be. In this case, even if the total area of the applied part is about 20 to 40% of the entire sheet area, the functionally processed sheet of the present invention can sufficiently exhibit antibacterial and deodorizing effects. A plurality of pigments and dyes can be combined to produce multicolor printing. The dispersed design may be a desired design as long as the design spreads over the entire sheet, and is not limited to, for example, stripes or dots.

As described above, a processed sheet having the desired photocatalytic activity can be obtained.
By the heat treatment in the drying process, the solvent of the raw material composition evaporates on the sheet, mainly the binder and the photocatalyst particles remain, and the binder captures the photocatalyst particles. Conventionally, since a paste containing a photocatalyst was directly printed on an adhesive, the photocatalyst was coated on the adhesive, resulting in hindering the photocatalytic activity. By doing so, the photocatalyst applied to the processed sheet can be exposed to the uppermost surface of the photocatalyst processed sheet of the present invention without being covered with an adhesive, and exhibits sufficient photocatalytic activity. It becomes possible.

Hereinafter, in the Example, the manufacture example of the photocatalyst processing sheet | seat of this invention is demonstrated. The present invention is not limited to these.
Various measurements were performed as follows.

(Gas decomposition experiment) Ammonia and acetaldehyde were used as detection gases, and the photocatalyst processed sheet 10 cm × 10 cm of the present invention was installed in a gas detection tube (Tedlar Back 31 manufactured by Kennis Co., Ltd.), with a gas concentration of 80 to 100 ppm. The accompanying gas concentration was measured. The measurement conditions were a room temperature of 20 ° C. and a humidity of 65%.

The photocatalyst performance evaluation test method determined by the Photocatalyst Product Technology Council was performed in accordance with the Gas Bag B method.
Sample: was prepared four cloth 100 mm × 100 m m subjected to photocatalytic process produced in Example.
As a pre-treatment, a test sample was prepared by performing ultraviolet irradiation (1.0 mW / cm ² ) for 3 hours or more using an ultraviolet irradiation device. The ultraviolet irradiation distance to the upper surface of the test piece was about 25 cm.
(Used equipment)
(1) Test gas preparation tedlar bag (material PVF, capacity 5L, with 1 minicock)
(2) Tedlar bag for evaluation (material PVF, capacity 5L, with 1 minicock)
(3) Light-shielding box (4) Ultraviolet irradiation device (black light fluorescent lamp (20 watt type FL20S / BLB manufactured by Toshiba Corporation)) were attached in parallel.
(5) Ultraviolet intensity meter (Topcon UVR-2, UD-36) Measurement wavelength range 310 to 400 nm Oblique incident light characteristics 30 °: within ± 3%, 60 °: within ± 10%, temperature characteristics within ± 3% (−10 ° C. to 40 ° C., 23 ° C. standard), humidity characteristics within ± 3% (6) Acetaldehyde gas detector tube (92M manufactured by GASTEC (detection range 2.5 to 100 ppm))
(7) Gas collector (similar to detector tube)

(Test method)
Test gas Acetaldehyde was prepared in advance to a gas concentration of 100 ppm, and a total of 4 Tedlar bags (2 for dark conditions and 2 for light conditions) were prepared.
A cut was made on one side of the Tedlar bag, a test sample was put in from there, and then the air in the bag was discharged and heat sealed.
While irradiating ultraviolet light (1 mV / cm ² ) for bright conditions, the gas concentration over time was detected by a detector without irradiation for dark conditions.
The removal rate was determined by the following formula.
(Initial density-measured value)-(Initial density-measured value) under dark conditions
Initial density-dark condition (initial density-measured value)

(Escherichia coli activity test) A sample of 50 mm x 50 mm was immersed in 10 ml (1 x 10 ⁵ / ml) of a bacterial solution and irradiated with light (and light-shielded) for 24 hours.

Light source: fluorescent lamp (18 W × 2, illuminance 3900 lux, ultraviolet intensity 8 μW / cm ² )
Temperature: 28 ° C
After the completion, the serially diluted bacterial solution was inoculated into a compact dry “Nissui CF” (for E. coli number measurement), and the number of bacteria was measured after incubation at 37 ° C. for 24 hours.

Example 1
(Adjustment of photocatalyst layer paste)
Titanium oxide (Ecodevice Co., Ltd., titanium oxide content 95.1% by weight), dispersant (inorganic) sodium hexametaphosphate (Ohira Chemical Industry Co., Ltd. ), polyisocyanate (Murakami Chemical Laboratory Co., Ltd.), antifoaming agent (Murakami Chemical Research Co., Ltd. Nonionic Surfactant-Mineral Oil), Emulsifier (Murakami Chemical Laboratory Co., Ltd. Polymer Synthetic Resin), Surfactant (Murakami Chemical Laboratory Co., Ltd. Nonionic Surfactant), and water Is adjusted with the following composition.
Titanium oxide 10.0
Dispersant 0.5
Polyisocyanate 0.2
Antifoam 0.1
Emulsifier 2.5
Surfactant 0.2
Water 86.5

The adjustment method is as follows. Fill a 500 ml glass container with water. Into this, a dispersant, a polyisocyanate as a crosslinking agent for resin , and an antifoaming agent were sequentially added, and stirred for 5 minutes with a homomixer. Further, the surfactant and titanium oxide were sequentially added while stirring. Subsequently, a predetermined amount of the emulsifier was added in this order while stirring for 5 minutes.
Finally, an emulsifier was mixed to adjust the viscosity of the paste to 8000 to 15000 cps to obtain 200 g of an emulsion paste for the photocatalyst layer.

(Adjustment of binder layer paste)
Acrylic resin (acrylic ester copolymer emulsion manufactured by Murakami Chemical Laboratory Co., Ltd.) , polyisocyanate (produced by Murakami Chemical Laboratory Co., Ltd.), emulsifier (polymer synthetic resin manufactured by Murakami Chemical Laboratory Co., Ltd.), and water Adjust with.

Acrylic resin 30.0
Polyisocyanate 0.5
Emulsifier 1.5
Water 68.0

The adjustment method is as follows. Fill a 500 ml glass container with water. Next, the acrylic resin is charged and stirred for 10 minutes with a hand mixer.
Further , the polyisocyanate and the emulsifier A, which are resin crosslinking agents , were sequentially added while stirring.
Thereafter, a pigment prepared in an arbitrary color was added and stirred.
Finally, the viscosity of the paste was adjusted to 6,000 to 10,000 cps with emulsifier A to obtain 200 g of an emulsion paste used for the binder layer.

(Printing method)
Two screens having an arbitrary design (coating area ratio 30%) were prepared.
One sheet was for the photocatalyst layer, and a screen type having a mesh of about 360 to 600, and the other was for the binder layer and a screen type having a mesh number of 800 to 1200 was used.
In addition, both used what gave the completely same pattern.

A screen mold for the binder layer was set in the unit in front of the autoscreen printing machine, and a screen mold for the photocatalyst was set in the next unit.
Next, a dough of any material is fed, and the binder layer paste is printed first. The coating amount was about 30 to 50 g / m ² (adjusted appropriately depending on the material of the fabric).
Furthermore, before the binder layer paste is dried, the photocatalyst layer paste is printed. The coating amount was about 25 to 40 g / m ² (adjusted appropriately depending on the material of the cloth), and about 1.2 to 2.0 g / m ^{2 in} terms of titanium oxide.

  Then, the drying process was performed by hot air drying. The drying temperature was 100 to 130 ° C. and the drying time was 2 to 4 minutes. The obtained photocatalyst processed sheet was subjected to a gas decomposition test. The results are shown in Table 1.

In the E. coli activity test, the initial bacterial concentration was 1 × 10 ⁵ / ml, 24 hours later, the number of bacteria irradiated with a fluorescent lamp was 0, and the number of bacteria when shielded from light was 6 × 10 ⁸ / ml. Antibacterial effect by fluorescent lamp irradiation was recognized.

(Comparative Example 1)
A binder resin and titanium oxide were mixed in the same paste to form a titanium oxide layer. The formulation is as follows.
Titanium oxide 5.0
Dispersant 0.25
Polyisocyanate 0.2
Antifoam 0.1
Emulsifier 2.5
Surfactant 0.2
Acrylic resin 20.0
Pigment Yellow 0.3
Pigment red 0.1
Pigment Blue 0.05
Water 71.3

  The above materials were mixed to prepare a raw material composition, and printed on a sheet in the same manner as in Example 1. A photocatalyst performance evaluation test was conducted. The results are shown in Table 1.

As is clear from the results of the above examples, the photocatalyst-processed sheet of the present invention can exhibit very remarkable photocatalytic performance as compared with the conventional method. In the photocatalyst performance evaluation test used in this example, the photocatalyst performance can be recognized if 70% is removed. According to the present invention, almost 100% can be removed, and the result is very high performance. It proves that.

  As described above, the photocatalyst-processed sheet of the present invention can fully exhibit its performance by supporting the photocatalyst on the sheet. Examples of the final product using the photocatalyst processed sheet of the present invention include socks, underwear, upper garments, nightclothes, trousers, skirts, gloves, hats, handkerchiefs, towels, curtains, sheets, futons, carpets, table cloths, etc. Or a sheet using a laminated material of natural fiber, synthetic fiber, synthetic resin, or a combination of these, but is preferably used.

Claims (7)

On the fabric body, a binder layer containing a binder resin ,
A photocatalyst layer containing photocatalyst particles is laminated in this order,
The binder layer is formed by drying a raw material composition (I) containing a binder resin , a resin crosslinking agent, an emulsifier, a pigment, and water.
A photocatalyst processed cloth having wash resistance, wherein the photocatalyst layer is dried from a raw material composition (II) containing photocatalyst particles, a dispersant, an antifoaming agent, a resin crosslinking agent, an emulsifier, and water. The photocatalyst processed cloth according to claim 1, wherein the raw material composition (II) includes photocatalyst particles selected from the group consisting of titanium oxide, zinc oxide, tungsten dioxide, niobium dioxide, and silicon oxide. The photocatalyst processed cloth according to claim 1 or 2, wherein the raw material composition (II) contains 3 to 30 wt% of titanium oxide particles. The raw material composition (I) is a binder resin : 10 wt% to 30 wt%,
Crosslinker for resin: 0.5 wt% to 2.0 wt%,
Emulsifier: 2.0% to 3.0% by weight,
Pigment: 0.1% to 3.0% by weight,
Surfactant: 0.2% by weight to 1.0% by weight
The photocatalyst processing cloth in any one of Claims 1 thru | or 3 containing these. The raw material composition (II) is at least titanium oxide particles: 3 to 30% by weight,
Dispersant: 0.5% to 2.0% by weight,
Crosslinking agent for resin: 0.2% by weight to 1.0% by weight,
Antifoaming agent: 0.1% to 0.5% by weight,
Emulsifier: 2.0% to 3.0% by weight
Surfactant: 0.2% by weight to 1.0% by weight
The photocatalyst processed cloth according to any one of claims 1 to 4, comprising a raw material composition. The photocatalyst processed cloth according to any one of claims 1 to 5, wherein the raw material composition (II) further contains a foaming agent. Preparing a raw material composition (I) containing at least a binder resin , a resin crosslinking agent, an emulsifier, a pigment, and water;
Preparing a raw material composition (II) containing at least photocatalyst particles, a dispersant, an antifoaming agent, a crosslinking agent for resin, an emulsifier, and water;
Applying a raw material composition (I) containing the binder resin on a fabric;
Applying a raw material composition (II) containing the photocatalytic particles;
Including a drying step and / or a heating step, and a binder layer containing a binder resin on the cloth body;
A method for producing a photocatalyst-processed cloth having wash resistance, in which photocatalyst layers containing photocatalyst particles are laminated in this order.