JPH09296364A - Agent for antibacterial deodorizing treatment of textile fabric and antibacterial deodorizing treatment of textile fabric using the agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for the antibacterial deodorizing treatment of a textile fabric, enabling easy treatment of the fabric at a low cost without exerting adverse influence on the product, giving a treated product having excellent safety and heat-resistance and effective also for the elimination of ill odor of non-bacterial origin. SOLUTION: A slurry is prepared by dispersing a photocatalyst or a noble metal-supporting photocatalyst in water or an organic solvent. The photocatalyst is e.g. titanium dioxide and the noble metal is e.g. platinum. The concentration of the photocatalyst, etc., in the slurry is 0.0005-5wt.%. The slurry is brought into contact with a textile fabric to cause the deposition of the photocatalyst, etc., on the fiber surface. The contact is carried out by immersing the fabric in the slurry, coating the fabric with the slurry or compounding the photocatalyst, etc., together with a detergent to water or an organic solvent in the washing or rinsing of the fabric. The textile fabric is imparted with antibacterial property and deodorizing property by the action of the photocatalyst, etc., attached to the fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial and deodorant treatment agent for fiber cloth which can easily impart antibacterial and deodorant properties to the fiber cloth and a method for antibacterial and deodorant treatment of the fiber cloth using the same.

[0002]

2. Description of the Related Art In recent years, awareness of health and hygiene has increased along with the improvement of people's living standards, and in each field of clothing, food and living, antibacterial (including antifungal, the same applies below) and deodorant processed products and technologies. Have been put to practical use (for example, JP-A-6-205977 and JP-A-63-63).
465, JP-A-1-119394). In particular, in the field of clothing, various antibacterial and deodorant processing techniques have been developed because they come into direct contact with the body.

For example, in the case of subjecting fibers to antibacterial and deodorant processing, spinning stock solution, during oiling during spinning,
Antibacterial and deodorant processing is performed in each process such as gluing, finishing and dyeing. However, this method requires a large-scale device and a high degree of skill in order to perform antibacterial and deodorant processing on the entire fiber, which lacks in simplicity and limits the design and processing of the final product. There's a problem.

In order to solve this problem, a treatment method using a slurry in which an antibacterial deodorant is dispersed has been proposed.
According to this treatment method, in addition to being easily treated, it is also possible to treat a product (fiber cloth) obtained by processing a fiber,
Does not cause problems such as design restrictions.

As a treatment technique using the above-mentioned antibacterial / deodorant-dispersed slurry, for example, JP-A-60-90564 discloses treatment with an aqueous solution (slurry) in which a specific bactericide is dispersed with a specific surfactant. The method is described.
As the antibacterial agent for fibers, organic antibacterial agents such as amino acid glycosides (JP-A-3-130470) and organosilicon quaternary ammonium salts (JP-A-3-69670), metal ion-containing antibacterial agents (JP-A-6-212
No. 56) has been proposed.

[0006]

However, the conventional antibacterial agent and the antibacterial treatment method using the same have the following problems. First, the organic antibacterial agent has toxicity and skin irritation and thus has a problem in safety. In addition, the organic antibacterial agent has a problem in that various kinds of resin processing are required to adhere to the fiber material, the antibacterial treatment is complicated, and the texture of the fiber material is changed by the resin processing. Further, the organic antibacterial agent and the resin for this adhesion are weak to heat, and are heated by, for example, an iron (maximum temperature of about 20
There is a problem that it decomposes at 0 ° C. and the antibacterial property disappears. The organic antibacterial agent is expensive and has a problem in that the usable range is limited. On the other hand, the conventional inorganic antibacterial agents do not have sufficient antibacterial properties, and the coloring of the fiber cloth by ions also poses a problem.

Further, there is a problem that these conventional antibacterial agents have only antibacterial action. Therefore, although it has an odor-preventing and deodorizing effect against a bad odor derived from bacteria, it does not have an odor-preventing and deodorizing effect against daily odors such as tobacco odor and roasted meat odor.

The present invention has been made in view of the above circumstances, and is excellent in safety and heat resistance, can be easily processed at low cost without affecting the product, and is free from malodor derived from non-bacteria. It is an object of the present invention to provide an antibacterial and deodorant agent for fiber cloth which is effective and an antibacterial and deodorant treatment method for fiber cloth using the same.

[0009]

In order to achieve the above object, the antibacterial and deodorant treatment agent for fiber cloth of the present invention is configured to contain at least one of a photocatalyst and a photocatalyst carrying a noble metal.

The present inventors have conducted a series of studies in order to solve the above problems. In the process, I got the idea of applying a photocatalyst such as titanium dioxide to the antibacterial and deodorant treatment of fiber cloth. Based on this idea, research was continued to develop a technique for applying a photocatalyst to a fiber cloth, and the photocatalyst and a photocatalyst carrying a noble metal were attached to the fiber cloth by contacting them with a method such as dipping in a slurry state. It has been found that when this is done, an excellent antibacterial and deodorant effect is exhibited. It was also found that photocatalysts and the like have no toxicity and skin irritation and are highly safe, have high heat resistance, and do not lose their effect even at ironing temperatures. And the photocatalyst etc.
The inventors have found that the fiber cloth does not have an adverse effect such as feeling and coloring, and arrived at the present invention. The antibacterial and deodorant agent for fiber cloth of the present invention allows the fiber cloth to be easily subjected to the antibacterial and deodorant treatment at low cost without any influence, and the safety of the obtained fiber cloth does not have any problem.

In the present invention, the photocatalyst means a substance which exhibits an antibacterial and deodorant effect by directly or indirectly decomposing bacteria, organic substances and the like by a catalytic action by light irradiation. Also,
In the present invention, "antibacterial" means not only fungi and bacteria,
It is a concept that includes other microorganisms, and also includes so-called "bacteriostatic" that suppresses the growth and metabolism of microorganisms as well as sterilization.

In the present invention, the "photocatalyst carrying a noble metal" is a method of mechanically mixing the photocatalyst particles and the noble metal, and a suspension of the photocatalyst particles and a suspension of the noble metal particles are mixed and then fired. Method, a method of suspending precious metal particles in a solution containing a metal alkoxide of a photocatalyst metal, and drying and firing the same, a method of mixing the photocatalyst particles with an aqueous solution of an oxide of a precious metal, a chloride complex, etc., and then firing and drying, a photocatalyst A method of mixing an aqueous solution of a metal oxide, chloride or complex with an aqueous solution of a noble metal oxide, chloride or complex, followed by drying and firing, an aqueous solution of a photocatalytic metal oxide, chloride or complex and a noble metal It is a product produced by a method of mixing particles and then drying and firing.

For effect and economic reasons, the photocatalyst is S
e, Ge, Si, Ti, Zn, Cu, Al, Sn, G
a, In, P, As, Sb, C, Cd, S, Te, N
a metal selected from the group consisting of i, Fe, Co, Ag, Mo, Sr, W, Cr, Ba and Pb, a compound of said metal, a composite of said metal and an oxide of said metal. It is preferably at least one substance.

A particularly preferred photocatalyst is titanium dioxide because of its excellent antibacterial and deodorant effect.
The photocatalyst carrying the noble metal is preferably titanium dioxide carrying platinum.

In the present invention, the total content of the photocatalyst and the photocatalyst supporting the noble metal is usually 1 × 10 ^{-4 to} 100% by weight based on the whole antibacterial and deodorant treatment agent for fiber cloth.
Is set in the range. Therefore, the antibacterial / deodorant treatment agent for fiber cloth of the present invention may consist of at least one of the photocatalyst and the photocatalyst supporting a noble metal (100% by weight). Further, the antibacterial and deodorant treatment agent for fiber cloth of the present invention,
Additives such as photocatalysts for promoting antibacterial and deodorant effects and other components may be added.

Next, in the method of antibacterial and deodorant treatment of fiber cloth of the present invention, the antibacterial and deodorant agent for fiber cloth is dispersed in water or an organic solvent to prepare a slurry, and the slurry and the fiber cloth are brought into contact with each other. The photocatalyst and at least one photocatalyst supporting the noble metal are attached to the fiber cloth.

In this way, the fiber cloth is provided with antibacterial and deodorant properties due to the antibacterial and deodorant action of the attached photocatalyst and the like. The term "slurry" refers to a fluid in which fine solid particles are dispersed in a liquid.

When the slurry in which the antibacterial and deodorant treatment agent for fiber cloth is dispersed is brought into contact with the fiber cloth when the fiber cloth is washed with a detergent, the antibacterial and deodorant treatment agent for fiber cloth is used as a detergent. At the same time, it is added to water or an organic solvent, or to water or an organic solvent at the time of rinsing after washing. That is, according to the antibacterial deodorant treatment method of the present invention,
An antibacterial and deodorant treatment can be performed in the washing of the fiber cloth. Therefore, according to the present invention, it is possible to easily carry out antibacterial and deodorant treatment at the time of washing at home, and even in the case of washing carried out industrially by a trader such as cleaning, it is possible to collectively carry out antibacterial and deodorant treatment without providing a special step. Deodorant treatment can be performed.

Other than this, as a method of contacting the slurry with the fiber cloth, there are a method of applying the slurry to the fiber cloth and a method of immersing the fiber cloth in the slurry.

In the present invention, the dispersion ratio of the antibacterial and deodorant treatment agent for fiber cloth is 0.0005 to 5% by weight based on the total amount of the photocatalyst and the photocatalyst supporting the noble metal with respect to the entire slurry.
It is preferable to set it in a range such that This is because if it exceeds 5% by weight, the surface of the fiber cloth may be in a powder-sprayed state and the appearance may be impaired, and if it is less than 0.0005% by weight, a predetermined effect may not be obtained.

As the organic solvent, a halogen-based solvent,
It is preferably at least one organic solvent selected from the group consisting of hydrocarbon solvents and alcoholic aqueous solvents.

[0022]

Next, the present invention will be specifically described. First, the action mechanism of the photocatalyst according to the present invention will be described. When a photocatalyst such as titanium oxide is irradiated with ultraviolet rays or exposed to ultraviolet rays in visible rays, electrons become excited, which causes active radicals such as hydroxy radicals having a very strong oxidizing action (eg, .OH, .O.
OH, · O ₂ ^-, etc.) is generated efficiently. It is presumed that the active oxygen reacts with various fungi on the fiber cloth and an organic substance that causes a bad odor to oxidize and decompose, thereby exhibiting an antibacterial and deodorant effect. Therefore, the antibacterial and deodorant treatment agent for fiber fabric and the treatment method of the present invention can impart antibacterial property and deodorant property to the fiber fabric without being limited to the type of microorganisms or the type of living malodor.

As described above, the photocatalyst of the present invention is not particularly limited as long as it can be excited by light irradiation such as ultraviolet rays or ultraviolet rays in visible rays to effectively generate active oxygen. However, it is preferable to use the above-mentioned photocatalyst for the reason of effect and economical efficiency, and titanium dioxide is particularly preferable. The compound of the metal may be, for example, ZnS, SiC, CdS, Ga.
P, CdSe and the like, examples of the composite of the metal include ZnS-CdS, CdS-CdSe and the like, and examples of the oxide of the metal include SnO ₂ other than the above-mentioned titanium dioxide. , ZnO ₂ , WO ₃ , Fe ₂ O
₃ etc. These metals, compounds of the metals, composites of the metals and oxides of the metals can be used in combination of two or more.

Further, the photocatalyst of the present invention may carry a noble metal. By supporting a noble metal,
A better antibacterial and deodorant effect is obtained. As a precious metal,
In addition to the above-mentioned platinum, for example, Sr, Ga, Rh, Pt,
Examples thereof include Au, Cu, Ni and Al. Of these, Sr, Ga, Pt and Au are preferable, and Pt and Sr are particularly preferable.

And, as mentioned above, titanium dioxide carrying platinum is particularly preferable as the photocatalyst carrying noble metal. In the antibacterial and deodorant treatment agent for fiber cloth of the present invention, examples of additives and other components to be compounded in addition to the photocatalyst and the photocatalyst supporting a noble metal include, for example,
Examples include organic antibacterial agents, inorganic antibacterial agents, water repellents such as silicon and fluorine, dyes, fragrances, softeners, etc., but their mixing ratios may interfere with the functions of photocatalysts and photocatalysts carrying precious metals. It is within a range that does not adversely affect the fiber cloth.

The fiber cloth to which the present invention is applied is not limited to the type of fiber, the weave, and the use of the fiber cloth. For example, bedding sheets, towels, socks, pantyhose, underwear, outerwear, curtains, slippers, hats, mattresses, carpets, carpets, etc., or non-woven cloth, tents, sandbags, sails, hoods, ropes, etc. of the present invention Be the target.

Next, the antibacterial and deodorant treatment method for the fiber cloth of the present invention is carried out as follows. That is, first,
The antibacterial and deodorant treatment agent for fiber cloth is dispersed in water or an organic solvent to prepare a slurry. The dispersion ratio is such that the total weight of the photocatalyst and the photocatalyst supporting the noble metal is usually in the range of 0.0005 to 5% by weight, preferably 0.002 to 2% by weight, based on the whole slurry. Yes,
It is particularly preferably 0.05 to 0.5% by weight. Also,
Examples of the organic solvent include those mentioned above, and these are particularly used in dry cleaning.

Then, the fiber cloth to be treated is brought into contact with the slurry. As described above, this contacting method includes contacting, dipping and coating in washing clothes and the like.
The contact at the time of washing may be any of washing with a domestic washing machine, washing with an industrial washing machine, dry cleaning, hand washing, dipping, and the like. The contact in washing may be at any time during washing, rinsing, gluing, softening, and after rinsing. Among them, the contact at the time of washing and rinsing is preferable from the viewpoint of work efficiency and the ease of adhering the photocatalyst and the like. In addition, contact after rinsing is
It is carried out by immersing the fiber cloth in a slurry and then drying it.

The contact is not limited to washing, but the fiber cloth may be dipped in the slurry, or may be applied by spraying or brushing. Thus, when the fiber cloth is brought into contact with the slurry in which the antibacterial / deodorant treatment agent for fiber cloth of the present invention is dispersed, the photocatalyst in the treatment agent or the photocatalyst carrying a noble metal is attached to the fiber cloth. As a result, the fiber cloth is provided with antibacterial and deodorant properties.

[0030]

Next, an embodiment will be described. Example 1 A commercially available cotton knitted cloth and a cotton broad cloth having a size of 10 cm ² were washed once with water to obtain an untreated cloth. Next, titanium dioxide (ST-01, manufactured by Ishihara Sangyo Co., Ltd.) was added in an amount of 0.01 to 0.05 as shown in Table 1 below.
A slurry (suspension) was prepared by suspending in water at a concentration of wt%. Then, the following (A), (B), (C),
The untreated cloth was brought into contact with the slurry by the six types of contact methods shown in (D), (E), and (F). In addition,
Regarding (D), the contact method is the same as (A), platinum-supported titanium dioxide (manufactured by Ishihara Sangyo Co., Ltd.) is used in place of titanium dioxide, and regarding (E), the contact method is (A). Similarly, an untreated cloth was treated with trichlorethylene instead of water to obtain an antibacterial deodorant-treated test cloth. Then, with regard to (F), a predetermined amount of detergent was added to the washing liquid. (A) After stirring in a beaker for 5 minutes, it was naturally dried. (B) After stirring for 5 minutes in a mini washing machine (capacity: 5 liters), it was naturally dried. (C) After soaking for 1 hour, it was naturally dried. (D) The contact method was the same as in (A), and platinum-supported titanium dioxide was used instead of titanium dioxide. (E) The contact method was the same as in (A), and trichlorethylene was used instead of water. (F) Using a mini washing machine (capacity: 5 liters), 3 g of a commercially available laundry detergent (trade name "Enzyme Top", manufactured by Lion Corp.) was added to 5 liters of the slurry, and the mixture was stirred and rinsed for 5 minutes. Then, it was naturally dried.

With respect to the treated cloth thus obtained,
The antibacterial activity and deodorant activity were examined by the methods described below. The results are shown in Tables 1 and 2 below. As a control, an example in which titanium dioxide is not suspended is also shown. Further, the state of adhesion of the photocatalyst and the like to the fiber cloth was examined by a scanning electron microscope.

[Antibacterial activity] Leave each test cloth in the atmosphere for 3
Exposed to sunlight for hours. After that, food stamp (SM
A, a standard agar medium for general bacteria, manufactured by Nissui Pharmaceutical Co., Ltd.,
Viable bacteria on the test cloth were collected, cultured, and judged by the number of colonies.

[Deodorizing power] A test cloth treated under the conditions A, D, E and F was suspended in a transparent air-collecting bottle filled with a tobacco odor and a roasted meat odor and exposed to sunlight for 3 hours. The tobacco odor and roasted meat odor are typical life odors that are difficult to remove. After that, the test cloth was taken out, and the confirmation of the effect was judged by 10 arbitrarily selected monitors according to the following criteria.

Criteria 10: Strong odor 5: Strong odor 2: No odor, but weak odor 1: Barely perceptible odor 0: Odorless

[0035]

[Table 1]

[0036]

[Table 2]

From the results shown in Tables 1 and 2 above, it can be seen that each test cloth has higher antibacterial activity and deodorant activity as the concentration of titanium dioxide in the suspension increases. In addition, as a result of observing the adhesion state of titanium oxide on the test cloth with a scanning electron microscope, it was confirmed that the adhesion of titanium oxide particles to the test cloth increased as the concentration of titanium oxide in the suspension increased. From this, according to the treatment method of the present invention, it can be said that the fiber cloth can be easily subjected to the antibacterial and deodorant treatment.

[0038]

INDUSTRIAL APPLICABILITY As described above, the antibacterial and deodorant agent for fiber fabric of the present invention has excellent antibacterial and deodorant performance and is highly safe and heat resistant because it is an inorganic type. Further, the antibacterial deodorization treatment method using this is an extremely simple method of bringing the slurry of the treatment agent into contact with the fiber cloth, does not require a complicated process such as conventional resin processing, and is low cost. It is a practical method and can be carried out at home or in industrial washing without providing a special step. Therefore, according to the present invention, excellent antibacterial and deodorant properties can be easily imparted to the fiber cloth, and as a result,
It can be expected to prevent deterioration of the fiber cloth due to microbes such as mold and bacteria, discoloration, stains such as stains, and prevention of diseases caused by these microbes. Further, since it is possible to deodorize and deodorize daily odors such as tobacco odor and roasted meat odor, it can be expected to make daily life comfortable.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location B01D 53/86 B01J 23/38 A ZAB 23/42 ZABA B01J 23/38 35/02 J 23/42 ZAB 35 / 06 A 35/02 D06M 11/04 A 35/06 B01D 53/36 J D06M 11/83 ZABH

Claims (10)

[Claims] 1. An antibacterial and deodorant treatment agent for fiber cloth, comprising at least one of a photocatalyst and a photocatalyst supporting a noble metal. 2. The photocatalyst is Se, Ge, Si, Ti, Z
n, Cu, Al, Sn, Ga, In, P, As, Sb,
C, Cd, S, Te, Ni, Fe, Co, Ag, Mo,
3. At least one substance selected from the group consisting of a metal selected from the group consisting of Sr, W, Cr, Ba and Pb, a compound of the metal, a complex of the metal and an oxide of the metal. The antibacterial and deodorant treatment agent for fiber fabrics described. 3. The photocatalyst is titanium dioxide.
Alternatively, the antibacterial and deodorant treatment agent for fiber cloth according to the item 2. 4. The antibacterial and deodorant treatment agent for fiber cloth according to claim 1, wherein the photocatalyst supporting a noble metal is titanium dioxide supporting platinum. 5. The total content of the photocatalyst and the photocatalyst supporting a noble metal is set in the range of 1 × 10 ^{−4 to} 100% by weight based on the total amount of the antibacterial and deodorant treatment agent for fiber cloth. The antibacterial and deodorant treatment agent for fiber cloth according to any one of claims. 6. The antibacterial and deodorant treatment agent for fiber cloth according to claim 1 is dispersed in water or an organic solvent to prepare a slurry, and the slurry is brought into contact with the fiber cloth. A method for antibacterial and deodorant treatment of a fiber cloth, wherein at least one photocatalyst of a photocatalyst and a photocatalyst supporting a noble metal is attached to the fiber cloth. 7. A method for antibacterial and deodorant treatment of a fiber cloth, wherein the slurry in which the antibacterial and deodorant agent for fiber cloth is dispersed is contacted with the fiber cloth when the fiber cloth is washed with a detergent. The antibacterial and deodorant treatment method for a fiber cloth according to claim 6, wherein the antibacterial and deodorant treatment agent is mixed with water or an organic solvent at the same time as the detergent, or is mixed with water or an organic solvent at the time of rinsing after washing. 8. The antibacterial and deodorant treatment method for a fiber cloth according to claim 6, wherein the method of contacting the slurry with the fiber cloth is a method of applying the slurry to the fiber cloth or a method of immersing the fiber cloth in the slurry. . 9. The dispersion ratio of the antibacterial and deodorant treatment agent for fiber cloth is set in a range such that the total amount of the photocatalyst and the photocatalyst supporting the noble metal is 0.0005 to 5% by weight with respect to the entire slurry. 9. A method for antibacterial and deodorant treatment of a fiber cloth according to any one of items 8 to 8. 10. The organic solvent is at least one organic solvent selected from the group consisting of halogen-based solvents, hydrocarbon-based solvents and alcohol-based aqueous solvents.
An antibacterial and deodorant treatment method for a fiber cloth according to any one of 1.