JP2001288017A - Dispersion containing zinc pyrithione for antibacterial and antifungal processing and method for antibacterial and antifungal processing of fibers using the dispersion - Google Patents

Abstract

(57) [Problem] To provide a dispersion having extremely high treatment efficiency and extremely excellent stability as a dispersion for antibacterial and antifungal treatment. A zinc pyrithione-containing dispersion for antibacterial and antifungal processing obtained by grinding zinc pyrithione in suspension in the presence of a surfactant and water, wherein the zinc pyrithione in the dispersion has an average The zinc pyrithione having a particle size of 0.1 to 1 μm and a particle size of 2 μm or more is 5% of the total zinc pyrithione.
A zinc pyrithione-containing dispersion for antibacterial and antifungal processing, which has been pulverized so as to be at most% by weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to synthetic fibers such as polyester fibers, acrylic fibers and nylon fibers, semi-synthetic fibers such as acetate fibers, and natural fibers or synthetic fibers and semi-synthetic fibers. The present invention relates to a zinc pyrithione-containing dispersion for imparting antibacterial and antifungal properties to a fiber product made of a mixed fiber with fibers, and an antibacterial and antifungal processing method for fibers using the dispersion.

[0002] In particular, a dispersion which imparts antibacterial properties to these textile products against Staphylococcus aureus, methicillin-resistant Staphylococcus aureus (MRSA), Klebsiella pneumoniae, Escherichia coli, pathogenic Escherichia coli O157, and Pseudomonas aeruginosa, etc. And a processing method using the same. Also, the present invention relates to a dispersion liquid which is excellent in stability and handleability as a dispersion liquid and which can impart antibacterial and antifungal properties having extremely high washing resistance to fibers, and a processing method using the dispersion liquid.

[0003]

2. Description of the Related Art With the increasing hygiene orientation of textile products such as futon covers, curtains, towels, wall cloths (wallpapers), including textile products for clothing, antibacterial and antifungal processes have been developed for various textile products. It is thriving. In addition, in recent years, the problem of so-called nosocomial infections in the medical field has been greatly highlighted, and as a countermeasure, textile products in medical facilities such as surgical gowns, sheets, futon covers, partitions, ri-tens, white coats, sleepwear, etc. Research on antibacterial and antifungal processing technologies is urgent.

[0004] Antibacterial and antifungal processing techniques for products made of synthetic fibers and the like include, for synthetic fibers, kneading agents such as antibacterial agents and antifungal agents into the spinning solution of the synthetic fibers and spinning to obtain antibacterial and antifungal properties. A method of producing a fiber having, mixing and knitting it with other fibers as necessary to obtain a product, or a normally spun synthetic or semi-synthetic fiber or another fiber as necessary. There is a method of adhering (impregnating) an antibacterial agent or an antifungal agent to a cloth obtained by mixing and a product obtained by sewing the cloth.

[0005] As a method of attaching an antibacterial agent or an antifungal agent to fibers, a method of immersing the fiber or the fibrous product in a solution containing the antibacterial agent or the antifungal agent and keeping it under pressure, an antibacterial agent applied to the fiber or the fibrous product, And a method of impregnating a solution containing an antifungal agent and then heating, and a method of adhering an antibacterial agent and an antifungal agent to fibers or textiles using an adhesive component such as a binder resin and drying and fixing.

[0006]

However, antibacterial and antifungal products produced by any of these methods are weakened by new resistant bacteria that appear one after another, and textile products used in medical facilities. In order to carry out strong washing for safety reasons of infection prevention, it has been required to provide antibacterial and antifungal properties with stronger washing resistance.

Methicillin-resistant staphylococci, so-called MRSA
And more recently, the emergence of more resistant bacteria, such as vancomycin-resistant enterococci (VRE), and on the other hand, specific bacteriostatic processing specified by the Council for Evaluation of New Functions of Textile Products (abbreviated as JAFET), and hospital linen supply. The development of new antibacterial and antifungal technologies that can withstand harsh industrial washing is awaited.

The present inventors have conducted extensive research on a method for imparting antibacterial and antifungal properties to polyester fiber products, and have developed an extremely effective method (Japanese Patent Publication No. 5-124).
No. 75 gazette), and after that, continued research, and found a very effective method in the research to further develop based on this result. INDUSTRIAL APPLICABILITY The present invention can mainly impart strong antibacterial properties to fibers mainly composed of synthetic fibers against MRSA, Staphylococcus aureus, Escherichia coli, pathogenic Escherichia coli O157: H7, Pseudomonas aeruginosa and the like. An object of the present invention is to provide a novel zinc pyrithione-containing dispersion and a method for processing fibers having washing resistance using the dispersion.

[0009]

The gist of the present invention is a zinc pyrithione-containing dispersion for antibacterial and antifungal processing obtained by grinding zinc pyrithione in suspension in the presence of a surfactant and water. The zinc pyrithione in the dispersion is pulverized so that zinc pyrithione having an average particle diameter of 0.1 to 1 μm and a particle diameter of 2 μm or more is 5% by weight or less based on the total zinc pyrithione. The zinc pyrithione-containing dispersion for antibacterial and antifungal processing and the zinc pyrithione-containing dispersion for antibacterial and antifungal processing described above, wherein the zinc pyrithione concentration in the dispersion is 4 to 80% by weight. .

Further, the fibers are immersed in the zinc pyrithione-containing dispersion described above or a diluent thereof and heat-treated in a bath at 80 to 160 ° C. under normal pressure or pressure. An antibacterial and antifungal processing method for fibers, which is characterized by impregnating or adhering a dispersion or a diluent thereof, and then heat-treating in air at 110 to 230 ° C is also one of the gist.

Hereinafter, the present invention will be described in detail.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The fibers which can be used with the zinc pyrithione-containing dispersion of the present invention include natural fibers such as cotton, synthetic fibers such as polyester fibers, nylon fibers and polyacrylonitrile fibers, and semi-synthetic fibers such as acetate fibers. And fibers obtained by mixing them.

[0013] As the form of the fiber, yarn, knitted fabric, woven fabric,
Cloths and various products include, for example, clothing, bedding, rugs, curtains, indoor wall cloths, etc., especially sleeping clothes such as surgical gowns, nursing clothes, sheets and covers used in medical facilities such as hospitals. Products such as bedclothes, partition curtains, bandages, towels, towels and the like can be mentioned. As an antibacterial / antifungal agent used in the present invention, zinc pyrithione is used. Zinc pyrithione is a compound represented by the following formula [1].

[0014]

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Zinc pyrithione is characterized in that zinc is an essential component of the human body and is highly safe, and that a compound containing zinc (Zn) is hardly absorbed from the skin. Because of these properties, zinc pyrithione has a track record of being widely used in the fields of cosmetics and shampoos. Zinc pyrithione is usually in powder form, but as it is, fibers cannot be used for antibacterial and antifungal processing.

That is, in order for zinc pyrithione to be supported on fibers with strong washing resistance, it is necessary to bring zinc pyrithione into a special state. The first major requirement is the particle size of the zinc pyrithione. In addition, the control of the particle size at the time of pulverization in a suspended state is important, not just the particle size. Zinc pyrithione can be finely pulverized in a dry state and dispersed in a solvent such as water to form a dispersion.However, when such a means is used, the powder of zinc pyrithione partially reaggregates or has a particle size. The distribution is disturbed, resulting in a dispersion containing zinc pyrithione of various particle sizes.

Even when the antibacterial and antifungal processing of fibers is performed using such a zinc pyrithione dispersion having a disturbed particle size distribution, zinc pyrithione cannot enter between fibers or between fiber molecules, resulting in poor processing efficiency. Further, only those having low washing resistance can be obtained. This is presumed to be due not only to the fact that the aggregated large particles cannot enter between the fiber molecules, but also to prevent other fine particles from trying to enter (permeate) between the fiber molecules.
Further, it is considered that particles that are too fine must be pulverized for a considerably long time so as to be industrially disadvantageous, and are likely to be re-agglomerated.

The dispersion of the present invention has a size that can be successfully fixed between fiber molecules while preventing re-aggregation by grinding zinc pyrithione in a suspension state in the presence of a surfactant and water. To obtain a dispersion in which zinc pyrithione particles not too large or too small are dispersed. The zinc pyrithione in the dispersion has an average particle size of 0.1 to 1 μm and 2 μm.
It is pulverized so that zinc pyrithione having a particle size of m or more is 5% by weight or less, preferably 3% by weight or less, more preferably 1% by weight or less, further preferably 0.5% by weight or less based on the total zinc pyrithione.

By applying zinc pyrithione to fibers in the presence of a surfactant and water in such a particle size range, zinc pyrithione enters between fibers and between fiber molecules and does not fall off. It becomes a dispersion liquid that is easily fixed. In addition, the dispersion has a zinc pyrithione concentration of 4 to 80% by weight, so that the pulverized particles are less likely to aggregate again due to the balance between the particle size and the concentration. To maintain a stable dispersion state.

The particle size of the zinc pyrithione in the dispersion is determined according to JI
It was measured using a laser diffraction particle size distribution analyzer in accordance with SR1629, and the average particle size
% Means the median diameter. Next, in order to maintain the stable state of the dispersion and improve the fixing rate of zinc pyrithione to the fiber, the dispersion is adjusted to have a pH of 4 to 10 during or after pulverization, preferably 5.5 to 8.5, More preferably, it is desirable to adjust between 6 and 8.

When a dispersion of zinc pyrithione or a dispersion for fiber processing (hereinafter sometimes referred to as “working liquid”) obtained by diluting the dispersion deviates from a predetermined range to an alkaline side or an acidic side, decomposition of zinc pyrithione occurs. As a result, a desired effect is not easily obtained, and a dispersion liquid (including a processing liquid) which is stable over time is not obtained. In order to maintain a stable state for a long period of time and to improve the fixing rate of zinc pyrithione to the fiber, the dispersion liquid (including the “processing liquid”) is adjusted to have a pH within the above range during or after the pulverization. Things are desirable.

When the pH of the dispersion is on the alkaline side, a predetermined amount of an acid such as acetic acid, hydrochloric acid, phosphoric acid or the like may be added to adjust the pH to the above range. If there is, a predetermined amount of alkali such as sodium carbonate and caustic soda may be added. The dispersion usually has a pH of 4 to
At the raw material stage, the pH is adjusted so as to be between 10 and 10. However, disturbance factors of the pH are in the process of pulverizing zinc pyrithione, the process of dyeing the fiber, and the process of functionally processing the fiber.

That is, in the present invention, zinc pyrithione-containing dispersion is obtained by pulverizing zinc pyrithione in suspension in the presence of a surfactant and water. In this case, a ball mill, a crusher such as a hammer mill will be used,
In the pulverization, not only the zinc pyrithione is pulverized but also slightly, but the device side, that is, the balls and the hammer of the mill are shaved and mixed into the dispersion.

In a wet pulverizing apparatus such as a ball mill, a pulverizing tool composed of a ceramic ball, a glass ball, or the like is used. If a small amount of these pulverizing tools is mixed into the dispersion, the dispersion changes to an alkaline side. When the dispersion is on the alkaline side, decomposition of zinc pyrithione starts, and the stable state of the dispersion cannot be maintained.

Depending on the material of the pulverizer, the dispersion may change to the acidic side. In this case, too, the decomposition of zinc pyrithione starts, and the stable state of the dispersion cannot be maintained. When the pH is changed to the acidic side, the pH may be adjusted to 4 to 10, preferably 5.5 to 8.5 by adding an alkali such as sodium carbonate or caustic soda described above.

As the pulverizing device, a pulverizing device made of a material which does not change the pH of the dispersion liquid, that is, does not cut itself at the time of pulverization and does not mix into the dispersion liquid, is used. Such a problem does not occur if a pulverizing device made of a neutral material that does not change the pH is used. However, in practice, a pulverizer made of a material that does not change the pH is a device that can efficiently pulverize. Not.

The zinc pyrithione dispersion thus obtained is usually a dispersion containing zinc pyrithione in an amount of 4 to 80% by weight from the viewpoint of handling capacity and storage capacity. Is used as a so-called "working liquid" obtained by diluting the concentrated dispersion. The working fluid actually used for fiber processing is used as it is or appropriately diluted according to the purpose of use, but usually the zinc pyrithione concentration in the working fluid is adjusted to 0.001% by weight to less than 4% by weight. Used. More specifically, in the bath method, the zinc pyrithione in the working fluid is 0.001% in the bath method.
In the case of the aerial method, the concentration of zinc pyrithione in the working fluid is adjusted to about 0.05 to 4% by weight, preferably about 0.1 to 2% by weight. It is better to use it after diluting it.

Dispersion (working liquid) used for fiber treatment
May be applied to the fiber alone, but usually it is often used in combination when dyeing the fiber or performing flame retardant treatment. In such a case, the dye, the flame retardant and their auxiliaries are mixed with the zinc pyrithione dispersion (working fluid). Is a disturbance factor.

As mentioned above, when the pH deviates from 4 to 10, the decomposition of zinc pyrithione starts and the dispersion (working fluid)
Cannot keep stable state. In addition, workability (processing efficiency) also decreases. In such a case, it is necessary to adjust the pH.
Next, as a prescription for preventing coloring of the dispersion, further maintaining the stable state of the dispersion, and improving the fixing rate of zinc pyrithione to the fiber, iron in the dispersion (a dispersion having a concentration of 4 to 80% by weight) is used. It is also effective to set the content of copper and copper to 0.1% by weight or less, preferably 0.01% by weight or less, more preferably 0.001% by weight or less based on zinc pyrithione.

When iron or copper is mixed in the dispersion, part of zinc pyrithione is changed to iron pyrithione or copper pyrithione. When the amount of iron pyrithione or copper pyrithione increases, that is, when the content of iron and copper exceeds 0.1% by weight with respect to zinc pyrithione, a color is formed in the dispersion and the problem of coloring during fiber processing is caused. This also causes problems in dispersion stability and fiber processability (processing efficiency).

As described above, the dispersion (working liquid) used for fiber processing is prepared by diluting a dispersion having a zinc pyrithione concentration of 4 to 80% by weight. Even if the amount of copper becomes higher than the concentration in the dispersion before dilution, the coloring may be diluted with the dispersion medium and used. In some cases, the content of iron and copper in the working fluid is 20% by weight based on zinc pyrithione.
In some cases, usually up to about 2% by weight.

At the raw material stage, divalent metals such as iron and copper are adjusted so as not to enter other than zinc of pyrithione zinc, but there are disturbance factors in the pulverizing step and the raw material system. That is, in the present invention,
Grinding zinc pyrithione in suspension in the presence of a surfactant and water gives a zinc pyrithione-containing dispersion. At this time, a crusher such as a ball mill and a hammer mill will be used. In crushing, not only the zinc pyrithione is crushed, but also slightly,
That is, the ball and hammer of the mill are shaved and mixed into the dispersion.

When a metal ball or the like is used as a pulverizing device such as a ball mill, a small amount of the pulverizing tool is shaved and mixed into the dispersion liquid, similarly to the above-mentioned disturbance factor of pH. When iron or copper is mixed into the dispersion, a part of zinc pyrithione is changed to iron pyrithione or copper pyrithione. When the amount of iron pyrithione or copper pyrithione increases, that is, the content of iron and copper is 0.1% relative to zinc pyrithione.
If the amount exceeds 10% by weight, coloration occurs in the dispersion, causing a problem of coloring during fiber processing, and also causes problems in stability of the dispersion and processability of the fiber.

It is also conceivable that iron or copper derived from water used as the dispersion medium may be mixed. The water used as the dispersion medium is treated with activated carbon, an ion exchange resin or the like to remove divalent metals such as iron and copper. It is desirable to use hot water. When pulverizing zinc pyrithione, surfactants used together with water include fatty acid soaps, anionic surfactants such as alkylbenzene sulfonate, naphthalenesulfonic acid formalin condensate, sodium polyacrylate, sodium ligninsulfonate, and alkylbenzyl. Applications include cationic surfactants such as ammonium salts and alkyl ammonium salts, amphoteric surfactants such as long-chain alkyl amino acids and alkyl betaines, and nonionic surfactants such as polyoxyethylene nonylphenyl ether and polyoxyethylene hydrogenated castor oil. Can be used as appropriate.

The amount of the surfactant used is usually about 0.5 to 10% by weight in the dispersion. The zinc pyrithione-containing dispersion is obtained by pulverizing zinc pyrithione in suspension in the presence of a surfactant and water, but when preparing a stock solution in the form of an aqueous suspension, a naphthalenesulfonic acid salt or ligninsulfonic acid is used. An anionic dispersant such as a salt, a nonionic dispersant such as styrenated phenol, polyoxyethylene hydrogenated castor oil, a quaternary ammonium salt-based cationic dispersant, or a dispersant composed of a mixture thereof may be used. .

Further, if necessary, a thickener, an antifreezing agent, an antifoaming agent and the like may be added. As a method of treating fibers using zinc pyrithione, the fibers are immersed in the zinc pyrithione-containing dispersion described in 1 or a diluent thereof, and heated in a bath at 80 to 160 ° C. under normal pressure or pressure. Treatment (in-bath method), or impregnating or adhering the fibers with the dispersion or its diluent,
The heat treatment is carried out at 30 ° C. in the air (in-air method).

The concentration of the above-mentioned zinc pyrithione-containing dispersion is set at 4 to 80% by weight for the sake of handling stability.
When actually used for fiber processing, it is used as it is or appropriately diluted according to the purpose of use. As described above, in the bath method, the zinc pyrithione in the working fluid is usually 0.001.
In the case of the aerial method, it is preferable to dilute zinc pyrithione in the working fluid to a concentration of about 0.05 to 4% by weight so that the concentration is about 0.2 to 0.2% by weight.

When the zinc pyrithione-containing dispersion is used for fiber processing, it is usually applied in the form of an aqueous emulsion or an aqueous suspension. The antibacterial and antifungal processing of the fibers according to the present invention is performed by the following method. First, when antibacterial and antifungal processing is performed under pressure, zinc pyrithione is put into a pressure-resistant sealed container so as to be about 0.001 to 20% by weight based on the weight of the fiber to be processed, and the fibers are immersed therein ( Bath method),
The heat treatment is performed at 80 to 160 ° C. under a pressure of about 0 to 620 KPa.

In the case of carrying out in the air, a zinc pyrithione-containing dispersion complex is used in an open vessel, and zinc pyrithione is added so as to be about 0.001 to 20% by weight with respect to the weight of the fiber to be processed. They are soaked or adhered by spraying or the like, taken out into the air, and heat-treated at 110 to 230 ° C. in the air using dry heat or, optionally, wet heat in the manner of drying.

The conditions for the antibacterial and antifungal processing of the fibers are slightly changed depending on the type of the fibers. However, in the case of polyester fibers, under pressure, at a temperature of about 100 to 140 ° C., in the case of nylon, acetate or acrylic fibers, under normal pressure. , 80-10
It is desirable to process at a temperature of about 0 ° C. In either case, the processing time may be about 30 seconds to 2 hours.

In this manner, the zinc pyrithione of the present invention having a specific particle size can be satisfactorily penetrated between the fiber molecules of the fibers and fixed properly. It is considered that the heating of the fiber results in an open state between the molecules of the fiber, so that the zinc pyrithione in the dissolved state in the dispersion liquid enters the intermolecular space and is fixed so as not to fall off. This is remarkably effective when the size of the zinc pyrithione particles is in the above-described specific size range.

That is, the effect of the dispersion liquid in which zinc pyrithione particles not too large or too small are dispersed.

[0043]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The washing method and various test methods in the examples are as follows.
The following method was followed. 1. Washing method 1) JIS L0217-103 (home washing at 40 ° C). JIS L1042-F2 (60 ° C laundry) 2) Washing method of JAFET specific bacteriostatic processing (Using a standard combination detergent of JAFET, washing is repeated 50 times at 80 ° C. In this example, 100 times. Was also washed.

2. Antibacterial test 1) Antibacterial test 2 types of Staphylococcus
aureus FDA209P and methicillin-resistant Staphylococcus aureus: MRSA), Klebsiel
la pneumoniae IFO13277), two types of Escherichia coli (Escherichia coli IF0)
3301 and E.C. coli O157: H7) and Pseudomonas aeruginosa.
IFO3755), the viable cell count of unprocessed cloth and processed cloth was measured by the unified test method of JAFET.

The antibacterial evaluation was evaluated as valid (O) when the number of recovered bacteria of each test cloth was less than the number of inoculated bacteria, and invalid (X) when the number of recovered bacteria was more than the number of inoculated bacteria. In the tables, Staphylococcus aureus is abbreviated as S, methicillin-resistant Staphylococcus aureus is abbreviated as M, Escherichia coli as E, pathogenic Escherichia coli O157: H7 as EO, Klebsiella pneumoniae as K, and Pseudomonas aeruginosa as P.

2) Antifungal test In accordance with JIS Z 2911, a fiber product was evaluated according to the following judgment in accordance with the mold resistance test method. -No hyphal growth was observed in the inoculated portion of the sample or test piece. ... 3-The area of the hyphal growth part observed in the inoculated part of the sample or test piece does not exceed 1/3 of the total area. ... 2-The area of the hyphal growth part observed in the inoculated part of the sample or test piece exceeds one third of the total area. ... 1 3. Measurement method 1) Particle size measurement The particle size of the zinc pyrithione in the dispersion is determined according to JIS R162.
It measured using the laser diffraction particle size distribution measuring apparatus based on No.9.

The average particle size means a median size corresponding to a cumulative 50%. 2) Treatment efficiency The ratio of the amount of zinc pyrithione adsorbed to the fibers after treatment of the fibers using the dispersion (reversely calculated from the amount of zinc pyrithione in the remaining treatment liquid) to the amount of zinc pyrithione in the original treatment liquid (%) Example 1 20 parts by weight of zinc pyrithione (powder manufactured by Arch Chemicals Co., Ltd., particle size of about 0.025 mm), 3 parts by weight of polyoxyethylene hydrogenated castor oil (dispersant), and sodium polyacrylate (thickener) Was prepared, 2 parts by weight of glycerin (an antifreezing agent) and 74.5 parts by weight of water were charged into a ball mill (using glass balls), and pulverized.

The pH of the solution at the start of pulverization was 6.5, but the pH after pulverization for 12 hours was 10.5.
At this point, acetic acid was added to adjust the pH and the pH was adjusted to 8.0. The concentration of zinc pyrithione in the resulting dispersion was 20% by weight, indicating a uniform dispersion state. A part of this dispersion was transferred to a 1-liter container and left for 24 hours, but no extreme separation was observed.

The average particle size of the pulverized zinc pyrithione is 0.1.
The zinc pyrithione having a particle size of 5 μm and 2 μm or more was 0.5% by weight based on the total zinc pyrithione. The content of iron and copper in the dispersion was 0.00% based on the total zinc pyrithione.
It was 1% by weight. This iron is considered to be derived from the water used. Polyester woven fabric (abbreviated as T in the table), polyester / cotton 85/15 mixed woven fabric (T / in the table)
C), triacetate woven fabric (abbreviated as A in the table), nylon woven fabric (abbreviated as NY in the table), and acrylic woven fabric (abbreviated as AC in the table). The obtained dispersion was subjected to antibacterial and antifungal treatments.

The working fluid is such that zinc pyrithione is contained in the working fluid in an amount of 0.0
The solution was used by diluting it with water so that the bath ratio (fiber weight: working fluid weight) was 4:10 by weight and 4: 1. The processing conditions were 135 ° C. for 60 minutes for polyester and polyester cotton blend.
In addition, triacetate, nylon and acrylic are 90
° C and 60 minutes. After processing, the product was washed with water, reduced and washed (only polyester), washed with water, and dried at 130 ° C. for 2 minutes.
In addition, polyester woven fabric and polyester / cotton 85/15
The mixed woven fabric was heat-set at 190 ° C. for 30 seconds and then industrially washed 100 times. For triacetate woven fabric, nylon woven fabric and acrylic woven fabric, household washing was performed 100 times.

An antibacterial test was performed on each of the obtained woven fabrics. The antibacterial evaluation was (○) for all woven fabrics subjected to antibacterial and antifungal processing. As a blank, antibacterial properties of all types of woven fabrics which were not subjected to antibacterial and antifungal treatments were examined. All were evaluated as (x), and all of the mold resistances were (1). Table 1 summarizes the evaluation results.

[0052]

[Table 1]

As is clear from Table 1, the dispersion of the present invention has extremely high treatment efficiency and extremely excellent stability. Further, it can be seen that each woven fabric processed according to the method of the present invention exhibits sufficient antibacterial properties even after washing under severe conditions. Example 2 A ball mill using zirconium balls was used in place of the ball mill using glass balls in Example 1.

When the pulverization time was set to 36 hours, the concentration of zinc pyrithione was 19.8%, and the average particle size was 0.2 μm.
A dispersion of 0.1% by weight of zinc pyrithione having the above particle size was obtained. When a test similar to that of Example 1 was performed, all the woven fabrics exhibited the same antibacterial and antifungal properties as those of Example 1. Example 3 The grinding time of Example 1 was set to 8 hours, the pH was adjusted to 8 with acetic acid, the concentration of zinc pyrithione was 20.2%, and the average particle size was 0.8.
2% by weight of zinc pyrithione with a particle size of 2 μm or more
Was obtained.

When the same test as in Example 1 was carried out, all the woven fabrics exhibited the same antibacterial and antifungal properties as in Example 1.

[0056]

According to the present invention, there is provided a dispersion having extremely high processing efficiency and extremely excellent stability as a dispersion for antibacterial and antifungal treatment. It also has antibacterial and antifungal properties against MRSA, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and other man-made fiber products such as polyester, acrylic, nylon, and acetate, and mixed fiber products of these and natural fibers. It can be subjected to a processing treatment that exhibits its antibacterial and antifungal properties, and can withstand severe washing.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4H011 AA02 AA03 BA01 BB09 BC03 BC06 BC19 DA14 DC04 DD07 DG15 DH02 DH03 4L033 AB01 BA55 BA99

Claims (3)

[Claims] An antibacterial and antifungal zinc-containing pyrithione-containing dispersion obtained by grinding zinc pyrithione in suspension in the presence of a surfactant and water, wherein the zinc pyrithione in the dispersion is: 2 μm with an average particle size of 0.1 to 1 μm
A zinc pyrithione-containing dispersion for antibacterial and antifungal processing, wherein zinc pyrithione having the above particle size is pulverized so as to be 5% by weight or less based on the total zinc pyrithione. 2. The method of claim 1, wherein the concentration of zinc pyrithione in the dispersion is 4 to 8.
The zinc pyrithione-containing dispersion for antibacterial and antifungal processing according to claim 1, which is 0% by weight. 3. The fiber is immersed in the zinc pyrithione-containing dispersion or its diluent according to claim 1 and heat-treated in a bath at 80 to 160 ° C. under normal pressure or pressure, or the fiber A method for impregnating or adhering the above-mentioned dispersion or a diluent thereof, followed by heat treatment at 110 to 230 ° C. in air.