JP2001288014A - Zinc pyrithione-containing dispersion for antibacterial and antifungal processing and method for antibacterial and antifungal processing of fibers using the dispersion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare dispersion which is used for antibacterial and antifungal processing and has extremely high treatment efficiency and highly excellent stability. SOLUTION: This zinc pyrithione-containing dispersion which is used for antibacterial and antifungal processing and is obtained by crushing the zinc pyrithione in the presence of a surfactant and water in a suspension state is characterized by controlling the contents of iron and copper in the dispersion to <=0.1 wt.%, respectively, based on the zinc pyrithione.

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 and pyrithione concentration in the zinc and pyrithione dispersion for antibacterial and antifungal processing, wherein the content of iron and copper in the dispersion is 0.1% or less based on zinc pyrithione. 4 to 80% by weight of the zinc pyrithione-containing dispersion for antibacterial and antifungal processing described above.

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 to carry the zinc pyrithione on the fiber with strong washing resistance and without causing coloring or the like, the zinc pyrithione needs to be in a special state.

The first major requirement is to control the content of iron and copper, which inhibits the stability of zinc pyrithione, reduces the fixing rate of zinc pyrithione to the fiber, and causes coloring. In the present invention, the content of iron and copper in the dispersion is set 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 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, 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).

The dispersion of zinc pyrithione is useful for handling.
From the viewpoint of storage capacity and the like, a dispersion containing zinc pyrithione in an amount of 4 to 80% by weight is usually used. The dispersion actually used for fiber treatment is a so-called "working liquid" obtained by diluting this thick dispersion.
It is used as 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 treatment method, in the bath method, zinc pyrithione in the working fluid has a concentration of about 0.001 to 0.2% by weight. The zinc pyrithione is preferably used after being diluted to a concentration of about 0.05 to 4% by weight, preferably about 0.1 to 2% by weight. Dispersion (processing liquid) used for this 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). It becomes a factor of disturbance of the amount of copper and the amount of pH described later.

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. In the case of this working liquid, zinc pyrithione zinc is used. Even when the amount of iron or copper with respect to the concentration becomes higher than the concentration in the dispersion before dilution, the coloring may be diluted with the dispersion medium and used. In some cases, in the case of a diluted working fluid, the content of iron and copper in the working fluid is allowed up to about 20% by weight, usually up to about 2% by weight based on zinc pyrithione.

By controlling the concentrations of iron and copper to such concentrations, the coloring of the dispersion is prevented, the stability of the dispersion is maintained, and the fixing rate of zinc pyrithione to the fiber is improved. At the raw material stage, divalent metals such as iron and copper are adjusted so as not to enter other than zinc pyrithione zinc, but there are disturbance factors in the pulverizing step and the raw material system.

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.

When a metal ball or the like is used as a wet grinding device such as a ball mill, a small amount of the grinding tool is shaved and becomes a cause of being mixed into the dispersion. If iron or copper is mixed into the dispersion,
Part of zinc pyrithione is converted 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. In addition, the stability of the dispersion and the processability of the fiber (fixation rate of zinc pyrithione) decrease.

It is also conceivable that iron or copper derived from water used as the dispersion medium is 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. Next, the particle size of zinc pyrithione is also a factor for supporting the fiber in a state where zinc pyrithione is provided with strong washing resistance.

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.

[0027] Even when antibacterial and antifungal processing of fibers is performed using such a dispersion of zinc pyrithione having a disordered 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 to the fact that the aggregated large particles cannot themselves enter between the fiber molecules, but also prevent other fine particles from trying to enter (permeate) between the fiber molecules.

Further, it is conceivable that particles that are too fine must be ground for a considerably long time so as to be industrially disadvantageous, and are likely to re-agglomerate. The dispersion of the present invention has a size that can be satisfactorily fixed between fiber molecules while preventing re-aggregation by grinding zinc pyrithione in the presence of a surfactant and water in a suspended state, that is, too large. To obtain a dispersion in which zinc pyrithione particles, neither too small nor too small, are dispersed.

The zinc pyrithione in the dispersion has an average particle diameter of 0.1 to 1 μm, preferably 0.3 to 0.6 μm, and zinc pyrithione having a particle diameter of 2 μm or more accounts for 5% by weight of the total zinc pyrithione. The pulverization is preferably carried out so as to be 3% by weight or less, preferably 1% by weight or less.
By applying zinc pyrithione to fibers in the presence of a surfactant and water in such a particle size range, zinc pyrithione can easily enter between fibers and between fiber molecules and be fixed without falling off. It becomes a dispersion liquid in a state.

Further, in this dispersion, by setting the concentration of zinc pyrithione in the dispersion to 4 to 80% by weight, pulverized particles are less likely to aggregate again due to the balance between particle size and concentration. Maintain a stable dispersion for a relatively long time. The particle size of the zinc pyrithione in the dispersion is J
The average particle diameter was measured using a laser diffraction particle size distribution analyzer in accordance with IS R1629.
It means the median diameter corresponding to 0%.

Further, as with the iron and copper contents described above, the pH of the dispersion is a major factor for supporting the zinc pyrithione in the fiber with strong washing resistance, as in the case of the iron and copper contents described above. . 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 has a pH of between 4 and 10, preferably 5.5 to 8.5, more preferably 5.5 or 8.5 during or after grinding. Is desirably adjusted between 6 and 8.

If the dispersion of the zinc pyrithione or the dispersion (working fluid) for fiber processing obtained by diluting the dispersion is shifted from the predetermined range to the alkaline side or the acidic side, the decomposition of the zinc pyrithione proceeds and the desired effect is obtained. It is difficult to obtain a stable dispersion liquid (working liquid) over time. 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, it is desirable that the pH of the dispersion liquid (working liquid) is adjusted to the above range during or after the pulverization.

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 itself be cut off 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.

When the pH deviates from 4 to 10, as described above, 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.
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, and when the dispersion is on the acidic side, sodium carbonate, caustic soda And the like may be added in a predetermined amount.

Surfactants used together with water when pulverizing zinc pyrithione include anionic surfactants such as fatty acid soaps, alkylbenzene sulfonates, condensates of naphthalenesulfonic acid and formalin, sodium polyacrylate and sodium ligninsulfonate. Nonionic surfactants such as cationic surfactants such as benzylalkylammonium salts and alkylammonium salts, amphoteric surfactants such as long-chain alkylamino acids and alkylbetaines, and polyoxyethylene nonylphenyl ether and polyoxyethylene hydrogenated castor oil An agent can be appropriately used depending on the application.

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, polynaphthalene sulfonate or lignin sulfone is used. Using an anionic dispersant such as an acid salt, a nonionic dispersant such as styrenated phenol, polyoxyethylene and hydrogenated castor oil, a quaternary ammonium salt-based cationic dispersant, or a dispersant comprising a mixture thereof Is also good.

Further, if necessary, a thickening agent, 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 above or a diluent thereof,
Heat treatment in a bath at 80 to 160 ° C. under normal pressure or pressure (in-bath method), or impregnate or adhere the dispersion or the diluent thereof to the fibers, and then pressurize at 110 to 110 ° C. at normal pressure
The heat treatment is performed at 230 ° C. in the air (in the air).

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, put zinc pyrithione in 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 immerse the fibers in this. (In-bath method), heat treatment at 80 to 160 ° C. under a pressure of about 0 to 620 KPa.

In the case of carrying out in air, a zinc pyrithione-containing dispersion complex is used in an open container, 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 treatment of the fibers are slightly changed depending on the type of the fibers. However, in the case of polyester fibers, the temperature is about 110 to 140 ° C. under pressure, and in the case of nylon, acetate and acrylic fibers, it is 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.

By doing so, the zinc pyrithione of the present invention can penetrate well between the fiber molecules of the fibers and is fixed well.

[0047]

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 (40 ° C home washing)
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 that. 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) Anti-mildew 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 grinding was 6.5, but the pH after grinding 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 zinc pyrithione after pulverization is 0.1.
The zinc pyrithione having a particle diameter 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 0.001% by weight based on zinc pyrithione. 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 (abbreviated as T / C in the table), triacetate woven fabric (abbreviated as A in the table)
Each of the dispersion liquid obtained above and each of a nylon woven fabric (abbreviated as NY in the table) and an acrylic woven fabric (abbreviated as AC in the table) was subjected to antibacterial and antifungal processing.

The working fluid was prepared by adding zinc pyrithione to 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. Home washing was performed 100 times for the triacetate woven fabric, nylon woven fabric, and acrylic woven fabric.

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.

[0056]

[Table 1] As is clear from the description in Table 1, it can be seen that the dispersion of the present invention has extremely high processing 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 In Example 1, a part of the water at the time of pulverizing zinc pyrithione was pulverized with distilled water to obtain a dispersion having a zinc pyrithione concentration of 20% by weight in the dispersion. The concentration of iron and copper in the dispersion was 0.0005% by weight based on the total zinc pyrithione.

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 In Example 1, a part of the water at the time of pulverizing zinc pyrithione was pulverized with distilled water to obtain a dispersion having a zinc pyrithione concentration of 20% by weight in the dispersion. The concentration of iron and copper in the dispersion was 0.0002% by weight based on the total zinc pyrithione.

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. Comparative Example 1 A dispersion was obtained in the same manner as in Example 1 except that iron-based alloy balls were used as the ball mill.

The concentration of zinc pyrithione after pulverization is 20% by weight, its average particle size is 0.4 μm, and zinc pyrithione having a particle size of 2 μm or more is 0.1% of the total zinc pyrithione.
However, the iron content was 0.2% by weight based on zinc pyrithione. A part of this dispersion was transferred to a 1-liter container and left to stand.
It gelled and was colored blue-pink.

Using the dispersion obtained above, a polyester woven fabric was subjected to antibacterial and antifungal treatments. The treatment liquid was diluted with water so that zinc pyrithione was 0.04% by weight (bath ratio: 1:10) in the processing liquid. Processing conditions are 135 ° C,
60 minutes.

After processing, the polyester woven fabric was washed with water, reduced, and washed with water, and dried at 130 ° C. for 2 minutes. The obtained woven fabric discolored and became unsuitable for practical use. Comparative Example 2 A dispersion was obtained by performing pulverization in the same manner as in Example 1 except that iron-copper alloy balls were used as balls of the ball mill.

The concentration of zinc pyrithione after pulverization was 20% by weight, the average particle diameter was 0.4 μm, and zinc pyrithione having a particle diameter of 2 μm or more was 0.1% by weight with respect to the total zinc pyrithione, but iron content was Was 0.12% by weight with respect to zinc pyrithione, and the copper content was 0.05% by weight with respect to zinc pyrithione. Transfer a portion of this dispersion to a 1 liter container,
Upon standing, the zinc pyrithione decomposed, gelled, and turned yellow-green-brown.

Using the dispersion obtained above, a woven polyester fabric was subjected to antibacterial and antifungal treatment. The working fluid was diluted with water so that zinc pyrithione was 0.04% by weight (bath ratio: 1:10) in the working fluid. Processing conditions are 135 ° C,
60 minutes.

After processing, the polyester woven fabric was washed with water, reduced, and washed with water, and dried at 130 ° C. for 2 minutes. The obtained woven fabric discolored and became unsuitable for practical use.

[0066]

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.

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Claims (3)

[Claims] 1. A zinc-containing pyrithione dispersion for antibacterial and antifungal processing obtained by grinding zinc pyrithione in suspension in the presence of a surfactant and water, comprising iron and copper in the dispersion. A zinc-containing pyrithione dispersion for antibacterial and antifungal processing, wherein the content is 0.1% by weight or less based on 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.