Deodorant cloth

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a deodorizing cloth using a cloth such as a woven fabric, a knitted fabric, or a non-woven fabric as a carrier of a photocatalyst for deodorizing zinc oxide or the like, and receives the light of the sun or a fluorescent lamp to release oxygen in the surrounding air. It is activated and used to eliminate indoor odors and clean the environment with this active oxygen.

【0002】

[Conventional technology]

A woven fabric made of nylon fiber or polyester fiber as a deodorant cloth that can activate the oxygen in the surrounding air by receiving the light of the sun or fluorescent lamp, eliminate the odor in the room with this active oxygen, and purify the environment. A corrosion-resistant film having an amorphous structure made of a corrosion-resistant metal such as titanium or silver alloy is formed on a fiber cloth such as a knitted fabric or a non-woven fabric by sputtering, and an amorphous structure made of a metal oxide such as titanium oxide or zinc oxide is formed on the corrosion-resistant film. It is known that the photocatalyst coating film of No. 8 is formed by sputtering (see JP-A-8-215295).

【0003】

When the deodorant fabric receives light in the air, a part of the light is reflected from the surface of the photocatalyst film or the surface of the corrosion-resistant film, and at that time, oxygen in the air is activated. That is, since light passes through the photocatalyst film twice, oxygen in the air is efficiently activated, and this active oxygen decomposes various germs in the air, removes bad odors and dirt, and purifies the environment. The corrosion-resistant coating protects the carrier fabric from the active oxygen without being attacked by the active oxygen itself, so that the carrier fabric does not become embrittled.

【0004】

[Problems to be Solved by the Invention]

However, in the above-mentioned deodorant cloth, both the corrosion-resistant film and the photocatalyst film provided on the surface of the carrier cloth are formed by sputtering, so that the productivity is low, the production cost is high, and the appearance is worm-colored. There is a problem that the color and pattern of the carrier cloth do not appear on the surface.

【0005】

In the present invention, in a fabric using a flexible fiber cloth as a carrier of a photocatalyst, by forming a corrosion-resistant film with a corrosion-resistant transparent resin, a sputtering process is not required to form the corrosion-resistant film, and the production cost is reduced. , The color and pattern of the carrier cloth can be seen from the photocatalyst film, and the function of the photocatalyst can efficiently purify the air, and the carrier cloth is not attacked by the active oxygen at the time of generation. , A deodorant fabric that can be processed into bedding and other interiors.

【0006】

[Means for solving problems]

In the deodorant cloth according to the present invention, a transparent corrosion-resistant film made of fluororesin is formed on the surface of the cloth made of synthetic fibers, and a transparent photocatalyst film made of a metal oxide is formed on the corrosion-resistant film. It is characterized by that.

【0007】

The above-mentioned fabric is a flexible fiber fabric such as a woven fabric made of synthetic fibers such as nylon fiber, polyester fiber, polyacrylonitrile fiber, and aramid fiber, knitted fabric, and non-woven fabric. The above synthetic fibers are particularly preferably filaments and are used in the form of monofilament yarns or multifilament yarns in woven and knitted fabrics. In the present invention, these fiber fabrics are used as carriers for photocatalysts, but it is preferable to apply appropriate dyeing or printing to the above-mentioned fabrics in advance according to the application after forming the photocatalyst film.

【0008】

The corrosion-resistant film on the surface of the fabric is formed of a transparent fluororesin having excellent corrosion resistance to active oxygen and light reflectivity. This fluororesin is a homopolymer or copolymer of ethylene monofluoride, ethylene difluoride, ethylene trifluoride or ethylene tetrafluoride, and is a polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer. , Tetrafluoroethylene / perfluoroalkoxyvinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene / perfluoroalkoxyvinyl ether copolymer, ethylene / tetrafluoroethylene copolymer, polychlorotrifluoroethylene, ethylene / chlorotrifluoroethylene Examples thereof include copolymers, polyvinylidene fluoride, polyvinyl fluoride and the like.

【0009】

The above-mentioned fluororesin is impregnated or applied to the above-mentioned carrier cloth in the form of an emulsified emulsion, and then dried and heat-treated, or a film made of the above-mentioned fluororesin is adhered to the above-mentioned carrier cloth with an adhesive to have corrosion resistance. Although it is formed on a film, when used in the form of an emulsified emulsion, a tetrafluoroethylene resin is used in particular, and an initial condensate of a thermosetting resin, especially a melamine resin, is added to improve the adhesiveness with the carrier fabric. On the other hand, when the film is molded and adhered, it is preferable to use an ethylene monofluoride, an ethylene difluoride or an ethylene trifluoride fluororesin. When a film is used, it can be adhered to the fabric after forming a photocatalyst film on the film.

【0010】

The preferable thickness of the corrosion-resistant film is 1 to 300 μm, and if this thickness is less than 1 μm, the protective function of the carrier cloth becomes insufficient, and the carrier cloth is easily attacked by active oxygen, and conversely, the thickness is the same. If it exceeds 300 μm, the transparency disappears and the processing cost rises, which is uneconomical.

【0011】

The photocatalytic coating on the corrosion-resistant coating has an excellent photocatalytic function and is formed of a metal oxide that efficiently activates oxygen in the air by receiving the light of the sun or an illumination lamp. The metal oxide is titanium oxide. Oxides of transition metals such as (titanium dioxide), zinc oxide, and copper oxide are exemplified. In particular, titanium oxide and zinc oxide are preferable because they are excellent in the above-mentioned photocatalytic function. The thickness of this photocatalyst coating is preferably 20 to 2000 Å, and if this thickness is less than 20 Å, the desired photocatalytic function becomes insufficient, and conversely, if it exceeds 2000 Å, only the cost increases without improving the oxygen activation function. Only, it is not economical.

【0012】

The above photocatalyst film can be formed by physical vapor deposition such as vacuum vapor deposition, sputtering, arc discharge, and ion beam method. Sputtering is particularly preferable because the obtained film has high strength and does not easily peel off. On the other hand, when a photocatalyst film is formed by applying an adhesive or resin containing a metal oxide powder, the above adhesive or resin is decomposed by the above active oxygen and the durability is lowered, which is not preferable. ..

【0013】

The above sputtering can be performed in an inert gas atmosphere such as argon by using a metal oxide as a target, but a simple substance metal such as titanium or zinc is used as a target and the sputtering chamber is mixed with argon and oxygen. It may be kept in a gas atmosphere and oxidized when a simple substance of metal is scattered from the target. In this case, DC sputtering becomes possible. Further, when zinc oxide-based ceramics are used as the target, DC sputtering can be performed in an argon gas atmosphere.

【0014】

The fabric having the corrosion resistant coating is spread in a closed chamber during sputtering. At that time, it is preferable to cool the fabric from the back surface with a water-cooled cylinder or the like to maintain the temperature of the fabric at 1/2 or less, particularly 1/3 or less of the melting point (absolute temperature) of the target metal, whereby the amorphous structure is formed. A photocatalytic film is formed and the photocatalytic function is increased.

【0015】

When the light of the sun or a fluorescent lamp enters the photocatalyst film of the obtained deodorant cloth, this light is reflected from the surface of the photocatalyst film and the surface of the corrosion-resistant film, and at that time, oxygen in the air is activated and air is activated. Eliminate the odor inside and clean the environment. Since the corrosion-resistant coating is a fluororesin, the corrosion-resistant coating itself is not attacked by active oxygen, and the carrier fabric is protected from active oxygen. Moreover, since the photocatalyst film and the corrosion-resistant film are transparent, when the carrier fabric has a color or pattern, the color or pattern can be seen from the photocatalyst film side, and a beautiful appearance is exhibited.

【0016】

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 A woven fabric made of polyester multifilament yarn is used as the carrier fabric of the photocatalyst, and the woven fabric is refined and set, then dyed with a disperse dye, dried and heat-set, and then the tetrafluoroethylene resin powder and the melamine resin are used. Immerse in an emulsified emulsion containing the initial condensate. In FIG. 1, reference numeral 10 denotes a dipping tank filled with the emulsified emulsion W. The dipping tank 10 is provided with a guide roller 11 on the inlet side, a dipping roller 12 on the inside, and a mangle 13 on the outlet side. The above woven fabric (carrier cloth) F is immersed in the emulsified emulsion W of the immersion tank 10 via the guide roller 11 and the immersion roller 12, squeezed by the mangle 13, dried and heat-set, and has a thickness of 1 on both the front and back surfaces. A corrosion resistant film of ~ 20 μm is formed.

【0017】

A photocatalyst film is formed on the corrosion-resistant film by sputtering. FIG. 2 is a vertical cross-sectional view showing an example of a sputtering apparatus, in which a flat plate-shaped target 21 is fixed on a hollow target source 22 with the surface facing up at the bottom of a sealable chamber 20, and the target source 22 is fixed. The cold water passed through cools the target 21 from the bottom surface. Anodes 23 are horizontally installed above and to the left and right of the target 21, and a DC voltage of 500 to 1000 V is applied between the anode 23 and the target 21 by the DC power supply E.

【0018】

A water-cooled cylinder 24 is installed horizontally and rotatably above the anode 23, and the delivery shaft 25 of the woven fabric F before processing is installed on the upper right side of the water-cooled cylinder 24, and the take-up shaft 26 of the woven fabric F after processing is located on the upper left side. Each of them is installed horizontally and rotatably, and the unprocessed woven fabric F wound around the delivery shaft 25 is pulled out, wound around the water-cooled cylinder 24 via the guide roller 27 in the upper right portion, and wound around the water-cooled cylinder 24 in the upper left portion, and the guide roller 28 in the upper left portion. It is wound on the winding shaft 26 through. Further, a vacuum pump 29, a gas cylinder 30 for supplying argon gas, and an oxygen cylinder 31 for supplying oxygen are connected to the chamber 20, respectively.

【0019】

In the above device, the delivery shaft 25, the take-up shaft 26, and the water-cooled cylinder 24 are rotated, and the fabric F is cooled by the water-cooled cylinder 24 while being fed at a predetermined speed in the clockwise direction, and the surface temperature of the fabric F is targeted as the target metal titanium. Maintain at about 1/7 to 1/6 of the melting point (absolute temperature) of. On the other hand, the vacuum pump 29 is driven to reduce the pressure inside the chamber 20 by 1 × 10.^-5The pressure is reduced to about Torr, and then argon gas is introduced from the gas cylinder 30 to reduce the pressure inside the chamber 20 to 5 × 10.^-4Adjust to about Torr, and then introduce oxygen from the oxygen cylinder 31 to increase the pressure inside the chamber 20 by 9 × 10.^-4Adjust to about Torr, and then apply a DC voltage between the anode 23 and the target 21 to make titanium pop out from the target 21 and react this titanium with oxygen in the chamber 20 to make titanium oxide, and this titanium oxide Is adhered onto the corrosion-resistant film of the above-mentioned woven fabric F to form a photocatalyst film having an amorphous structure. At this time, the feed rate of the woven fabric F is adjusted to form the thickness of the photocatalyst coating at 20 to 2000 Å.

【0020】

Embodiment 2 A transparent film having a thickness of 20 to 300 μm made of ethylene monofluoride, ethylene difluoride, or an ethylene trifluoride-based fluororesin is subjected to the same sputtering process as in the first embodiment, and the film is made of titanium oxide. A photocatalyst film of 20 to 2000 Å is formed, and then this film is adhered to the dyed woven fabric (polyester tuffata) F of Embodiment 1 with an adhesive to form the above film as a corrosion resistant film, and a photocatalyst of titanium oxide is formed on the film. A deodorant fabric having a film is obtained.

【0021】

Embodiment 3 In the first embodiment, the woven fabric is the same as the first embodiment except that zinc oxide-based ceramics are used as the target metal during sputtering, the introduction of oxygen gas into the chamber is omitted, and the sputtering is performed in an argon gas atmosphere. A deodorant cloth is obtained by laminating a corrosion-resistant film having a thickness of 1 to 20 μm made of ethylene tetrafluoride resin and a transparent photocatalyst film having a thickness of 20 to 300 μm made of zinc oxide on F (polyester tufter).

【0022】

[Example]

Example 1 A deodorant fabric was produced by the method of the first embodiment. Polyester taffeta is used as the carrier fabric F, and after refining and setting, a bath is used using a liquid flow dyeing machine (Circular dyeing machine RZ type manufactured by Nisaka Seisakusho) and a mixed dye of the following formulation (weight% of the weight of the fabric). It was dyed brown at a ratio of 1:20. That is, the temperature is raised from room temperature to 130 ° C, maintained at this temperature for 30 minutes, then lowered to 80 ° C to discharge the dyeing solution, soaped and washed with hot water, and then dried at 130 ° C for 2 minutes. , Heat set treatment was performed at 180 ° C for 1 minute. Disperse dye (Sumitomo Chemical Co., Ltd., "Sumikaron Yellow") 0.67% Disperse dye (Sumitomo Chemical Co., Ltd., "Sumikaron Red") 0.72% Disperse dye (Sumitomo Chemical Co., Ltd., "Sumikaron Blue") 0.25% PH adjuster (manufactured by NICCA CHEMICAL CO., LTD., "Benelap HE") 0.50% Acetic acid 0.50% [0023]

The brown-dyed woven fabric F was impregnated with an emulsified emulsion of tetrafluoroethylene resin by dipping. That is, 120 parts of an aqueous suspension of ethylene tetrafluoride resin (solid content 60% by weight, "Asahi Guard" manufactured by Asahi Glass Co., Ltd.), an initial condensate of melamine resin ("Liken Resin MA-100" manufactured by Miki Riken Kogyo Co., Ltd.) 12 parts and 1.2 parts of an amine-based catalyst (Riken Fixer RC manufactured by Miki Riken Kogyo Co., Ltd.) were mixed and diluted with water to make a total of 1000 parts. Immerse the dyed fabric F in the emulsion W, squeeze it with a mangle 13 (squeeze ratio 60%), dry it at 130 ° C for 2 minutes, and heat set it at 180 ° C for 1 minute. A corrosion-resistant film having a thickness of 3 μm made of tetrafluoroethylene resin was formed.

【0024】

Subsequently, the above-mentioned woven fabric F was sputtered by the apparatus shown in FIG. That is, the titanium target 21 is attached to the target source 22 in the chamber 20, and the pressure inside the chamber 20 is 1 × 10.^-5Depressurize the Torr and then introduce argon gas to increase the pressure to 5x10^-4Adjust to Torr and introduce oxygen to increase the pressure to 9 × 10.^-4Adjusted to Torr, and then while running the above woven fabric F at a speed of 0.1 m / min, a DC current of 500 V × 100 A was passed between the above anode 23 and the target 21 to make the thickness on the corrosion resistant coating of the woven fabric F. A 200 Å photocatalytic coating was formed. Cold water was flowed through the target source 22 and the water-cooled cylinder 24 to maintain the temperature of the target 21 at 10 ° C and the temperature of the woven fabric F on the water-cooled cylinder 24 at 40 ° C.

【0025】

The obtained deodorant fabric had a beautiful brown appearance and was suitable for curtains and bedding. Further, when a commercially available packaging gum tape was attached on the photocatalyst coating and a peeling test was performed, no peeling was observed in either the photocatalyst coating or the corrosion-resistant coating. Next, the above-mentioned deodorant cloth is cut into a predetermined size to prepare a sample, the above-mentioned sample Fa is hung in the test chamber 35 shown in FIG. 3, and this sample Fa is hung by the black light 36 in the chamber 35. While irradiating, a predetermined amount of acetaldehyde sealed in the chamber 35 was circulated by the pump 37 and the circulation pipe 38, and the change in the acetaldehyde concentration was measured by the gas concentration meter 39, and the graph of FIG. 4 was obtained. As is clear from this graph, the deodorant fabric of the example activated the oxygen in the chamber 35 by irradiation with black light, and the active oxygen rapidly decomposed and deodorized acetaldehyde. When taffeta having only a corrosion-resistant film and taffeta having no film were used as samples, no decrease in gas concentration was observed.

【0026】

Example 2 In the sputtering process of Example 1, a film having a thickness of 50 μm, a width of 100 cm, and a length of 100 m (Pictrico manufactured by Asahi Glass Co., Ltd.) made of ethylene monofluoride resin (Tedlar manufactured by Du Pont) instead of the woven fabric F. A photocatalyst film having a thickness of 200 Å made of titanium oxide was formed on the film in the same manner as in Example 1 except that the above film was used. On the other hand, a urethane adhesive (a 20% diluted solution of urethane resin methyl ethyl ketone with 2 parts of isocyanate added per 100 parts of urethane resin) was applied to the surface of the dyed woven fabric (polyester tuffata) F of Example 1. The above-mentioned fluororesin film was laminated on this coated surface so that the photocatalyst film was on top, and dried at 120 ° C. for 5 minutes to produce the deodorant fabric of Example 2. The obtained deodorant fabric of Example 2 had a beautiful brown appearance, peel resistance and photocatalytic function as in Example 1, and was suitable for curtains and bedding.

【0027】

[Effect of the invention]

In the inventions according to claims 1 to 4, since a corrosion-resistant film made of a fluororesin is interposed between the fabric and the photocatalyst film, sputtering processing is not required to form the corrosion-resistant film, and the production cost is reduced. Since the color and pattern of the fabric are reduced and the color and pattern of the fabric can be seen from the photocatalyst film, various appearances can be obtained by changing the above color and pattern, and the function of the photocatalyst is provided to efficiently purify the air. It is excellent as a deodorant fabric because it can be produced, the fabric is not attacked by the active oxygen at the time of generation, it is highly durable, and it can be processed for curtains, bedding and other interior fabrics.

【0028】

In particular, according to the invention of claim 2, various fluororesins can be used to reduce the thickness of the corrosion-resistant coating. Further, according to the invention of claim 3, a commercially available film can be used, and the film can be adhered to the fabric after the photocatalyst film is vapor-deposited on the film. Further, according to the invention of claim 4, the peeling resistance of the photocatalyst coating is improved.

[Simple explanation of drawings]

[Figure 1]

It is sectional drawing of the immersion tank.

[Figure 2]

It is sectional drawing which shows an example of a sputtering apparatus.

[Fig. 3]

It is sectional drawing of the test apparatus of a photocatalyst function.

[Fig. 4]

It is a graph which shows the result of the test by the apparatus of FIG.

[Explanation of symbols]

F: Cloth (woven fabric) Fa: Sample W: Fluororesin emulsified emulsion 10: Immersion tank 12: Immersion roller 13: Mangle 20: Sputtering chamber 21: Target 22: Target Source 23: Anode 24: Water-cooled cylinder 25: Send-out shaft 26: Take-up shaft 29: Vacuum pump 30: Gas cylinder 31: Oxygen cylinder 35: Test chamber 36: Black light 37: Pump 38: Circulation pipe 39: Gas concentration meter