JP4517247B1 - Ultrafine fiber and ultrafine fiber fabric having antibacterial and water absorption properties - Google Patents

Abstract

[PROBLEMS] A fiber, thread or fabric made of ultrafine fibers has a small gap and a large amount of dirt, so that dirt components easily accumulate. Especially in the case of water absorption, the dirt components are spoiled by bacteria or become nutrients of bacteria and adhere to bacteria. If you do, it will be easy to breed. Antibacterial properties are imparted to such water-absorbing fibers, yarns and fabrics composed of such ultrafine fibers to prevent bacterial growth.
A method of using antibacterial fibers, yarns and fabrics produced by adsorbing an antibacterial metal compound to a polyester fiber having a dyeability with a cationic dye. In this case, antibacterial performance can be obtained with a very low concentration of metal adsorption, and the antibacterial agent is firmly bound to the fiber, making it difficult for the antibacterial agent to elute (non-eluting). High antibacterial fibers, yarns and fabrics are produced. In these cases, water absorption is imparted by setting the ultrafine fiber conversion rate to 50% or more in the fiber structure, and antibacterial and water absorbent ultrafine fibers, ultrafine yarns, and ultrafine fabrics are obtained.
[Selection figure] None

Description

Fields of application where bacteria attached to water-absorbing fabrics using extra fine fibers are harmful on them, and fields of use where bacteria are propagated and propagated and diffused to cause harm, For example, new antibacterial properties are added to the application field of water-absorbing fabric using ultrafine fibers used in general clothing, surgical clothes, curtains, cleaning tools, hookins, masks, sanitary products, etc. It is considered available.

It has become clear that the bacteria attached on the fabric further propagated and caused various harms.
It has been pointed out that the bacteria on the fabric also have an effect on health, and it has been required to prevent or reduce the growth of bacteria.
In addition, with the improvement of people's awareness of cleanliness, there is an increasing demand for antibacterial and bactericidal properties in various fields using fabrics.
In particular, there is a new need for antibacterial properties for products that require water absorption that provides a suitable environment for bacterial growth and products that are in a water-absorbing state.

New development of sterilization and antibacterial technology Published Toray Research Center Co., Ltd. November 25, 1994 First edition published contains antibacterial action mechanism of silver as an antibacterial agent. Absent.

Japanese Patent Application No. 2-411141 describes a method for producing antibacterial fibers using silver as an antibacterial agent. The amount used is 1 to 1000 ppm, which is the same as the description of the preferred conditions of the present invention. However, the present invention is a novel invention because there is no need to make antibacterial and water-absorbing fibers or fabrics, which is the basic structure of the present invention, and there is no description suggesting the structure of the present invention. It is.
Further, Patent Document 1 cited herein is characterized in that the method for producing antibacterial fibers and resins is carried out at a temperature higher than the glass transition temperature of polyester.
On the other hand, as a preferable condition as one embodiment of the present invention, it is preferable that an antibacterial agent such as antibacterial silver is concentrated and distributed on the fiber surface although it is above the glass transition temperature. It is completely different in that it is preferable to adjust the temperature range and the processing time. Furthermore, in the present invention, the point that the ratio of fibers having dyeability to the cationic dye constituting the fabric is required to be at least 30% or more is new, and the description of these contents and the suggestion are also included in this reference. Is not found in US Pat.
In addition, there is no description for finding or suggesting an effect that almost the same antibacterial effect can be obtained if the silver content of the entire fabric is the same.
In the method for producing a deodorized fiber structure disclosed in Japanese Patent Application No. 7-061072 (JP-A-8-260347) (patent 3279120), a metal such as silver is dyed into a fiber structure having a carboxylic acid group and / or a sulfonic acid group. Thereafter, there is a description of a method of replacing hydrogen ions of a carboxylic acid group and / or a sulfonic acid group with a metal ion such as Ag + after treatment with an alkali agent or under alkaline conditions. In order to introduce a carboxylic acid group and / or a sulfonic acid group into a fiber structure, a method of copolymerizing a vinyl monomer having these groups into a fiber polymer, a method of blending a polymer having these groups into a fiber polymer, etc. It is described that there is. Patent document 2 of this reference differs from the present invention product for the purpose of water absorption and antibacterial properties in the field of application, target effect, and efficacy in that it is a deodorized fiber structure.
In addition, Patent Document 2 of this reference also describes that the method for substituting a metal is performed after treatment with an alkaline agent or after dyeing under alkaline conditions, as described in claim 1 of the present invention. Is different.
Furthermore, there is no description of the use of ultrafine fibers and water absorption, which are essential constituent elements described in the claims of the present invention, in the cited Patent Document 2.
Judging from the above, Patent Document 2 of this reference has different purposes and means of the present invention, and there is no description of the configuration of the present invention, and no suggestion is found.
The deodorant antibacterial fiber of JP-A-5-214671 relates to an invention for satisfying both deodorant and antibacterial properties. The deodorizing and antibacterial fiber characterized in that it is composed of a metal ion having an antibacterial action and an ion exchange fiber substituted with an ion having a deodorizing action is the invention of Patent Document 3 of this reference. Patent Document 3 of this reference is the same as the present invention in that silver is described as a metal exhibiting antibacterial properties.
Moreover, it is similar to the present invention in that an antibacterial metal is subjected to a substitution reaction with the ion exchange fiber.
The ion exchange fiber is exemplified as an ion exchange fiber in which a cation exchange group is introduced into a base polymer such as polystyrene. From this description, the possibility of reacting with a cationic dye is not imagined, but even if it reacts, it is different from the expression that it has dyeability. In addition, there is no description of polyester fibers having dyeability in the cationic dye of the present invention, and no description suggesting this is found. That is, there is no description of the polyester polymer in the polymer description of the ion exchange fiber in the illustrated specific example, and there is no description suggesting the polyester polymer. Furthermore, it is said that the ion exchange polymer in which a chelate group is introduced into the exemplified polymer is preferably a fiber made of a reinforcing polymer. This is good because it has mechanical strength and form retention. From these points, it is impossible to suggest a polyester fiber which has a dyeability in the cationic dye of the present invention and does not require reinforcement.
Further, Patent Document 3 of this reference is a fiber having deodorant properties and antibacterial properties, and is completely different from the fibers having antibacterial properties and water absorption properties of the present invention.
The invention of the present application uses ultrafine fibers to provide water absorption. However, in Patent Document 3 of this reference, the fiber diameter of the ion exchange fiber is described as 0.1 to 100 μm. Although it can be said that ultrafine fibers are also included, there is no idea to devise a water-absorbing configuration with a thin fiber diameter, and there is no description suggesting this.
The water content of the ion exchange fiber is usually described as 0.5 to 10 according to necessity from the application, and the upper limit is also defined as 1 to 5 as a preferable range.
It is described as a regulation because the liquid passing (venting) resistance increases if it is too large. In this respect, the larger the water absorption, the more different the purpose, effect and efficacy from the preferred product of the present invention.
Furthermore, the moisture content referred to in Patent Document 3 of this reference is just what defines the amount of water that the fabric can hold in the tissue structure under the defined conditions, as defined by the words. This is not only different from the idea of the present invention in which the function of pumping water by positively utilizing the capillary function of the ultrafine fibers is used, but also the patent configuration is completely different.
Japanese Patent Application Laid-Open No. 2004-255256 (absorbent made of split-type composite fibers) describes the use of ultrafine fibers of 0.001 to 3 dtex. Patent document 4 of this reference is an invention relating to a fabric-like absorbent material containing an antibacterial agent in a fiber or attached to a surface thereof. Although the point which uses an ultrafine fiber for a structure and the point which is a water absorption fabric is common, the polymer structure which comprises the ultrafine fiber differs from this invention.
That is, Patent Document 4 uses split ultrafine fibers in which component A is a polycapramide polymer and the other component B is at least two components of a polyester polymer.
On the other hand, the present invention is different in that a polyester fiber having dyeability in a cationic dye is at least essential.
In the polyester polymer component of Patent Document 4, there is a description of a polymer that makes it imagine that it reacts with a cationic dye, but there is no description that an antibacterial agent is reacted with this polymer to impart antibacterial properties to fibers or fabrics. There is no description that suggests.
It is merely described as the composition of component B for making ultrafine fibers.
Silver-supported diriconium phosphate is described as an example of a preferable antibacterial agent, but the antibacterial agent of the present invention is different in that it preferably uses silver or silver ions that are not in a supported state.
Further, Patent Document 4 of this reference describes that the amount of silver-supported diriconium phosphate used is not more than 0.1 wt% because the essential antibacterial effect cannot be satisfied, which is not preferable. In the present invention, the antibacterial agent is described. The silver itself is supported (adsorbed) on the fiber, and the preferable range of the amount is 30 to 10000 ppm.
In addition, in Patent Document 4 of this reference, a polycapramide polymer is essential as the component A. However, as a fiber that can be used in combination with a polyester fiber having dyeability in the cationic dye of the present invention, a nylon fiber that is a polycoupler polymer is used. In the post-processing method of the preferred antibacterial property imparting method of the present invention, silver adsorption (contamination) occurs, so that it is not preferable to use a large amount. In this respect as well, the present invention is completely different from the cited Patent Document 4. Therefore, the patent document 4 of this reference is completely different from the present invention in the patent composition, and there is no description suggesting the patent composition of the present invention.

The necessity of the antibacterial market is required in various fields, and various antibacterial technologies and antibacterial products have been developed and provided to the market.
The present invention has been developed for the purpose of inhibiting the growth of microbes on water-absorbing ultrafine fibers, water-absorbing yarns using ultrafine fibers, and fabrics. It is said that temperature, moisture and nutrients are necessary for the growth of fungi.
Among these factors, the selection of temperature is not basically possible for textile products used in daily life, and is generally used under various temperature conditions.
Moreover, it can be said that the product used especially for the purpose of water absorption absorbs moisture and has been devised so that it can be easily retained, and thus is conveniently configured for the propagation of bacteria.
Conventionally, ultrafine fibers have been used as one means for imparting water absorption.
Extra fine fibers have a large surface area and a lot of gaps, and water and nutrients necessary for the propagation of fungi often accumulate there, which is presumed to cause the growth of fungi.
The present invention has been developed for the purpose of imparting antibacterial properties to water-absorbing fabrics, water-absorbing fibers, and yarns made of water-absorbing fibers, which use this ultrafine fiber, which contains moisture and nutrients and is convenient for the growth of bacteria. is there.

Developed for the purpose of imparting antibacterial properties to fibers, yarns, and fabrics using ultrafine fibers that are easy for bacteria to propagate as described above, especially those using ultrafine fibers intended for water absorption It is.

As a result of earnest research on the method of making antibacterial and water-absorbing fibers, yarns, and fabrics using ultrafine fibers, the ultrafine fibers themselves are antibacterial ultrafine fibers, and the ultrafine fibers and antibacterial fibers are appropriately combined. As a result, the inventors have found that antibacterial and water-absorbing ultrafine fibers, yarns using ultrafine fibers, and ultrafine fiber fabrics can be obtained.

Fibers, yarns, and fabrics using ultrafine fibers that have both antibacterial properties and water absorption can be obtained. Using these fibers, yarns, and fabrics, products such as towels, hookins, sheets, and masks that have never been used before can be made. Can be done.

The method for producing ultrafine fibers having both water absorption and antibacterial properties, yarns using ultrafine fibers, and fabrics using ultrafine fibers according to the present invention will be described in detail.
The ultrafine fiber of the present invention refers to a fiber having a single yarn fineness of 1.1 denier or less. When fibers, threads, and fabrics are made using thin threads of 1.1 denier or less, water is easily absorbed by capillary action. Among the ultrafine fibers of 1.1 denier or less, a polyester fiber that is strong even when thin and excellent in heat resistance and excellent in durability for use is a preferable fiber.
When considering the use of ultrafine fibers, yarns using ultrafine fibers, and fabrics using ultrafine fibers of the present invention in hospitals and food-related applications, dust generation from the fabric becomes a problem.
In this case, the ultrafine fiber is preferably a polyester-based ultrafine fiber having high strength, excellent dust repellency and heat resistance, and is particularly preferably a long-fiber type polyester-based ultrafine fiber in terms of further less dust generation. .

In addition, as described above, the ultrafine fiber used in the fabric is preferably a long fiber type from the viewpoint of dustiness, but from the viewpoint of making a fiber or fabric having a large water absorption, the long fiber type polyester fiber is bulky and has a microscopic property. It is preferable to use a composite yarn type in the form of a certain processed yarn type, a mixed fiber mainly composed of ultrafine fibers, a design twisted yarn or the like.

The antibacterial performance of the fabric can be obtained by using antibacterial fibers, but the antibacterial fibers are antibacterial fibers even if the ultrafine fibers themselves are antibacterial or are combined with the ultrafine fibers. It may be. In order to obtain sufficient antibacterial performance as an antibacterial fabric, the weight ratio of fibers exhibiting antibacterial properties in fibers, yarns and fabrics is at least 30% or more, preferably 40% or more, more preferably 50% or more. It is necessary to be.

These fibers, yarns, and fibers exhibiting antibacterial properties in the fabric can be produced by using antibacterial fibers in which an antibacterial agent is appropriately supported on the fibers when forming fibers, forming yarns, or forming fabrics.
As a method for producing antibacterial fibers and yarns, for example, a method in which an antibacterial agent is blended with a main polymer constituting the fibers in a process of producing the fibers is generally well known.
Examples of antibacterial agents include silver-supported zeolite and copper-supported zeolite. (In the present invention, it is called a yarn type)
When making antibacterial polyester fibers of the original yarn type, the particle size of the antibacterial agent generally needs to be about 1/10 or less of the fiber diameter, mainly for this reason, 1.1 denier or less It is said that it is difficult to make antibacterial ultrafine fibers.

Another method of making antibacterial polyester fibers and yarns can be made by combining antibacterial polyester fibers and non-antibacterial polyester fibers. In this case, the proportion of the antibacterial polyester fiber is required to be 30% or more from the viewpoint of the antibacterial performance of the fiber, preferably 40% or more, more preferably 50% or more.

The antibacterial polyester fiber can be made by subjecting a polyester fiber that can be subjected to antibacterial post-processing described later to post-processing. (Referred to as post-processing type)
In the case of a polyester antibacterial fiber that can be post-processed, the weight content of the polyester fiber that can be post-processed antibacterially needs to be 30% or more, preferably 40% or more, more preferably 50% or more. It is. Post-processing type antibacterial fiber requires much less antibacterial agent than raw yarn type antibacterial fiber, and can control the distribution of antibacterial agent at a high concentration in the fiber surface direction of the fiber cross section This is a method for producing antibacterial fibers that are preferable in that it can produce antibacterial fibers such as microfibers.

The antibacterial and water-absorbing ultrafine fibers, ultrafine yarns, and ultrafine fabrics having both antibacterial properties and water absorbency referred to in the present invention refer to fibers, yarns, and fabrics having an ultrafine fiber conversion ratio of 50% or more.
The method for obtaining fibers, yarns, and fabrics containing the antibacterial fibers of the present invention includes a method of using an antibacterial fiber of an original yarn type, an antibacterial fiber of a post-processing type, and a fiber, yarn using a post-processable fiber. It can be made by carrying out post-processing after forming a fabric.
Furthermore, it can be implemented by combining these. In other words, fibers, yarns and fabrics are formed using antibacterial fibers of the original yarn type and post-processed type and post-processable fibers, and further antibacterial processing is performed by post-processing to provide antibacterial fibers, threads and antibacterial properties. It is also possible to make this fabric.
In this case, by changing the type of antibacterial agent used in the production of antibacterial fibers (raw yarn type) and the antibacterial agent used in post-processing, yarns and fabrics that exhibit antibacterial properties against a wider range of bacteria are made. In some cases, this is the preferred method.
In order to obtain sufficient antibacterial performance even with the above-mentioned antibacterial fibers, yarns and fabrics, the content of antibacterial fibers is 30% or more, preferably 40% or more, more preferably 50% or more.

When making post-process type antibacterial fibers and yarns, there is a method of applying an antibacterial agent to the surface of the fibers and yarns using a binder, but the subsequent weaving and knitting process, sheeting process, dyeing and dyeing finishing process This application method is not preferable in consideration of the productivity of the antibacterial agent as well as the productivity. A preferable method is a method based on an antibacterial post-processing method using an antibacterial agent of a type that strongly adsorbs or reacts with fibers.
Specifically, an antibacterial fiber obtained by adsorbing a metal to a polyester fiber having dyeability to a cationic dye, and a post-processing type antibacterial processing method for obtaining a yarn is a preferable method for producing an antibacterial fiber and yarn. . Water-absorbing and antibacterial yarns can also be made by combining antibacterial fibers and ultrafine fibers. If antibacterial fibers and yarns themselves are ultrafine fibers and yarns, there is no need to dedicate them. (Ultra-thinning rate 100%)

Similarly, a post-processing type processing method similar to that for producing antibacterial fibers can be carried out in the method of obtaining antibacterial fibers, yarns and fabrics using fibers, yarns and fabrics that can be processed with antibacterial materials.
When this post-processing method is applied to fabrics using fibers and yarns that can be post-processed, the amount of antibacterial agent can be adjusted as needed, and even if the fabric design is constant, the antibacterial level Can be adjusted arbitrarily, which is a very efficient and preferable method in terms of production and planning.
Antibacterial fibers, yarns and fabrics obtained by post-processing methods that use adsorption or reaction type antibacterial agents are washable because antibacterial agents are more strongly adsorbed or reacted to the fibers than post-processing by binderer methods It is possible to produce antibacterial fibers, yarns, and fabrics having excellent properties.

When some or all of the fibers, yarns and fabrics are made antibacterial by the binder-type post-processing method of the antibacterial fibers, yarns and fabrics of the present invention, the antibacterial agent on the surfaces of the fibers, yarns and fabrics is washed. It is not preferable because it will drop off and lack the durability of antibacterial performance.
Also, in the post-processing method, when the antibacterial agent is simply adsorbed on fibers, yarns, and fabrics, the antibacterial agent is eluted again during use depending on the use conditions, so it is preferable in the application field where the safety of the antibacterial agent is questioned. It is not a thing.
The antibacterial post-processing of the type that reacts and bonds strongly with the fiber is most preferable.

Whether it is post-processed in the form of fibers or yarns or post-processed in the form of fabrics, it is confirmed that the halo can be confirmed by the halo test that evaluates the antibacterial property. It can be confirmed that the size of is less than a certain standard. In the present invention, the case where this halo cannot be formed or is below a certain level (1 mm or less) is defined as a non-eluting antibacterial fiber.
The antibacterial property of the product of the present invention is preferably a non-eluting antibacterial property.

In the method for producing water-absorbing and antibacterial fibers, yarns and fabrics of the present invention, the antibacterial property is imparted by various methods as described in detail above. This is achieved by adding fibers.
The ultra fine fiber means a yarn having a single yarn denier of 1.1 denier or less. Further, the ultrafine fiber, ultrafine fiber yarn or ultrafine fiber fabric referred to in the present invention means a fiber, yarn and fabric containing 50% or more of fibers having a single yarn denier of 1.1 denier or less. (Ultra-thinning ratio is 50% or more)
The ultra-thinning method includes yarns having a thickness of 1.1 denier or less at the time of fiber production, and finally fibers having a thickness of 1.1 denier or less are obtained by dividing or splitting the yarn after being formed into a yarn or fabric. Fiber, yarn or fabric may be used. From the viewpoint of water absorption, it is preferable that the proportion of ultrafine fibers in the entire fibers, yarns, and fabrics is at least 50%, preferably 60% or more.
In addition, if necessary, post-processing such as water absorption (sweat absorption) processing generally performed for the purpose of further improving water absorption performance may be used in combination with anti-microbial post-processing, or before or after anti-microbial processing. There is no.

When antibacterial properties are imparted to fibers, yarns, and fabrics by post-processing methods, if 100% of the fibers, yarns, and fabrics that have a dyeability to the cationic dye are used, there is a problem that antibacterial agents react and adsorb to the fibers. There is no antibacterial effect in the case of fibers that are complexed with fibers in which cationic dyes do not have dyeability but partly adsorbed or contaminated, and yarns, fabrics, and interwoven or knitted composite fabrics that use complexed fibers. Part of the agent is adsorbed and contaminated. For this reason, discoloration or dropout occurs during use. Use of these fibers makes the weight ratio within 30% of the fibers, yarns and fabrics. Is preferred. In particular, in the application field where the non-eluting property of the antibacterial agent is desired, a combination with a material that adsorbs in a state of being easily removed is not preferable.
Examples of such unfavorable fibers and yarns with danger include polyamide fibers, acetate fibers, regenerated cellulose fibers, cotton, wool and the like.
If the antibacterial agent can be removed by washing or the like when contamination occurs, or if it can be inactivated by oxidation, reduction, or the like, there is no particular problem.
The most preferable fibers that can be used in combination are polyester fibers, polypropylene fibers, and polyvinyl chloride fibers that do not cause contamination or partial adsorption.
Of these, polyester fibers having strong heat resistance and strength are most preferable.

Non-eluting antibacterial fibers, yarns and fabrics that do not generate halos are produced by blending antibacterial agents at the time of fiber production. It can be made by a method in which a metal is adsorbed and reacted with fabric.
In particular, the polyester fiber having dyeability to the cationic dye, and the antibacterial processing method by post-processing to adsorb the metal to the yarn or fabric can be applied to fibers, yarns and fabrics using water-absorbing and antibacterial ultrafine fibers. is there. That is, it is possible to easily produce the water-absorbing and antibacterial fibers and fabrics of the present invention by making fibers, yarns and fabrics using ultrafine fibers having a dyeability in the cationic dye and performing antibacterial post-processing. preferable.

As a method for imparting antibacterial properties to fibers, yarns, and fabrics having a dyeability with a cationic dye by a post-processing method, known methods can be applied. Examples of the metal compound exhibiting antibacterial properties such as water-soluble silver such as silver nitrate, silver lactate, zinc chloride and copper sulfate, zinc and copper. Among these metal compounds, a silver compound is particularly preferable from the viewpoint of safety and reactivity, and antibacterial performance, and silver nitrate is particularly preferable from the viewpoint of handleability and reactivity with fibers. These metal compounds become cationic when dissolved in water, and strongly bind ionically to fibers having dyeability to the cationic dye during the reaction process.

When fibers are reacted with aqueous solutions using these water-soluble antibacterial agents, the metal compound metal and impurities contained in water react to reduce the effective utilization rate of the antibacterial agents and cause trouble. Sometimes.
Since the cause of these troubles is often caused by ions that react with metal ions contained in water, a post-processing method using ion-exchanged water is a preferred method.

Polyester fiber with dyeing property to cationic dye that becomes antibacterial fiber when applying antibacterial property by post-processing method to fibers, yarns, and fabrics using polyester fiber with dyeing property with cationic dye using ultrafine fiber Is a fiber, yarn or fabric used at least 30% or more, preferably 40% or more, more preferably 50% or more, and the water-absorbing property of the present invention is obtained by adsorbing a metal to the fiber, yarn or fabric. And antibacterial fibers, yarns and fabrics can be easily produced.

Polyester fibers and yarns that have dyeability to cationic dyes react with ordinary cationic dyes, for example, normal type polyester fibers and yarns copolymerized with sulfonic acid groups and sulfonate groups, and groups that react with cationic dyes. Any of core-sheath type polyester fiber, yarn, bonded polyester fiber and yarn of polymerized polymer and normal polyester polymer can be used. In the case of a core-sheath type polyester fiber and yarn, the structure in which a polymer obtained by copolymerizing a sulfonic acid group that reacts with a cationic dye is arranged in the sheath and a normal polyester polymer is arranged in the core has antibacterial properties and strength. It is preferable that the balance of physical properties can be freely designed.
That is, the antibacterial performance can be adjusted on the surface of the sheath, and physical properties such as strength can be adjusted on the core.
It can be particularly suitably used in application fields where the strength of fibers and yarns and the strength of fabrics are required.
Specifically, it is preferable when this core-sheath type polyester fiber is used in food-related fields and hospital-related fields where steam treatment for sterilization is performed.

As described above, in order to impart antibacterial properties to fibers, yarns, and fabrics, antibacterial post-processing of a type that strongly reacts and bonds with fibers, yarns, and fabric fibers is preferable, and is important in carrying out the present invention.
This antibacterial post-processing is a preferable method that can be applied to both processing in a fiber form and processing in a thread form or a cloth form.

This method of imparting antibacterial properties by post-processing is a particularly preferable method because the processing temperature and time can be selected so that a large amount of antibacterial agent is disposed on the fiber surface.
For example, if the processing time is shortened or the processing temperature is diffused, permeated and reacted, a secondary transition temperature is required, but among these, by setting it lower, it is possible to adsorb many antibacterial agents on the surface. The distribution state of the antibacterial agent from the surface to the center in the cross section of the fiber or thread can be confirmed with a scanning electron microscope with an EDS detector.
When the antibacterial agent is applied by the above-described post-processing method, it is possible to bond the antibacterial agent mainly on the surface of the fiber cross section so that the amount of adsorbed antibacterial agent is 1000 ppm or less. Antibacterial effect is obtained. In the present invention, the proportion of antibacterial fibers in the fibers, yarns, and fabrics is defined as at least 30% or more, but the antibacterial fibers, yarns, and fabrics using the antibacterial fibers having an adsorption amount of 1000 ppm are 300 ppm. It shows that the antibacterial effect can be demonstrated with a very small amount of antibacterial agent. (When the proportion of antibacterial fibers is 30%)

In this way, it is possible to reduce the amount of antibacterial agent used in the present invention by taking advantage of the large surface area of the ultrafine fiber by providing more antibacterial agent on the surface and making the ultrafine fiber itself antibacterial. It is. The preferable range of the antibacterial agent with respect to the fabric weight of the product of the present invention is 30 to 10,000 PPM. The amount of a preferable antibacterial agent in which non-elution is important is 30 to 1000 PPM, and a sufficient antibacterial effect can be obtained even in this range.

The fibers, yarns and fabrics using ultrafine fibers that have both antibacterial performance and water absorption performance can be subjected to water absorption processing that is usually performed to further increase the water absorption performance.
If necessary, antistatic processing and water repellent processing can be performed as long as the antibacterial performance is not impaired.

In the present invention, the antibacterial property was evaluated by JIS L 1902 (bacterial liquid absorption method), and the antibacterial effect was evaluated by the method (JEC301) described in the certification standard for antibacterial and deodorant processing of the Textile Technology Council.

The antibacterial evaluation that the antibacterial agent is firmly bound is evaluated by the non-eluting property that the antibacterial agent does not elute from the fabric or is difficult.
That is, the non-eluting properties of the non-eluting antibacterial fibers, yarns and fabrics described in the present invention mean that the size of the bacterial growth inhibition circle is determined when the antibacterial properties are evaluated by the JIS L 1902 hello test method. The case of the size of 1 mm or less is said.

Water absorption was evaluated by JIS L 1096 A method (drop method), JIS L 1096 B method (Byreck method) and the like.

Material dustiness was evaluated by the tumbling method described in JIS B 9223.

The air permeability was evaluated by the fragile method described in JIS L 1079.

The collection efficiency was measured by a method based on the IES RP-3001 (1985) 6 method.
Examples will be specifically described below.

A woolen twill fabric was made using 75 denier and 72 filaments (single yarn denier is 1.04) of polyester long fiber, which has a dyeability of cationic dyes for warp and weft.
The warp density and weft density of this fabric were 153 and 148 per inch. This fabric was scoured, relaxed and set by a normal method to produce fabrics having warp and weft densities of 162 and 164 per inch, which were used as antibacterial fabrics (fabrics for the present invention). A regular polyester long fiber processed yarn that does not have a dyeability in cationic dyes, 75 denier, 36 filaments are used to make exactly the same fabric, and the same processing is applied to a Wool Twill fabric of the same standard. (Comparative fabric).
These fabrics were processed under the following antibacterial processing conditions to produce antibacterial processed fabrics of the present invention and comparative antibacterial processed fabrics.
The antibacterial processing conditions are as follows: 949PPM silver nitrate per fabric weight is dissolved in ion-exchanged water 40 times the fabric weight to make a processing solution, and the fabric for the present invention and the comparative fabric are 100 ° C in this processing solution. The treatment was performed at the temperature of 60 minutes.
After the processing, it was thoroughly washed with ion-exchanged water, and then dried and set by a usual method to produce an antibacterial processed fabric of the present invention (product of the present invention) and a comparative antibacterial processed fabric (comparative product).
As a result of quantitative analysis of the amount of silver on the antibacterial processed textile using ICPS-8000 manufactured by Shimadzu Corporation, 273PPM silver was adhered to the product of the present invention, and 5PPM silver was adhered to the comparative product.
It can be seen that the product of the present invention adsorbs silver better than the comparative product. The comparative product had an adsorption amount within the measurement error range.
The antibacterial properties of the silver-adsorbing fabric of the present invention and the antibacterial treated fabric for comparison were examined.
The antibacterial performance was evaluated by the antibacterial test method (bacterial solution absorption method) of textile products described in JIS L 1902, and the antibacterial effect was evaluated by the method described in the antibacterial and deodorant processing certification standard of the Japan Fiber Technology Council (JEC301) . Bacteriostatic activity against Staphylococcus aureus is 4.1 and 3.5 for the present product before and 10 times after washing, 0.1 and 0 for the comparative product, and the present product is antibacterial with excellent washing durability It can be seen that this is a fabric with a texture.
Washing was performed according to the washing method described in the SEK mark textile product washing manual (JEC326) described in the product certification mark of the Japan Textile Technology Council.
The water absorption performance was examined for wicking property by the dropping method described in JIS L 1096A. The wicking property of the product of the present invention was 5 seconds, the wicking property of the comparative product was 20 seconds, and the product of the present invention was excellent in water absorption.
The material dust repellency was evaluated by a method based on the IES RP-3001 (1985) 5.5 method. Both the product of the present invention and the comparative product are woven fabrics using polyester filament yarns, and the amount of material repellent with a particle size of 0.5 microns is as small as 120/135 and 135 / L for both the product of the present invention and the comparative product. It was. The products of the present invention described in the examples can be said to be antibacterial, water-absorbent, and a clean room class 100-compliant fabric.
Both the inventive product and the comparative product were measured by washing with clean water after washing when measuring the amount of material dust repellency.

Antibacterial property of the product of the present invention prepared in Example 1 was measured by a qualitative test (halo method) of JIS L1902. The average width of the halo was 1 mm or less, and almost no halo was observed. The product of the present invention can be said to be an ultrafine fiber fabric having non-eluting antibacterial properties and water absorption as defined herein.
The product of the present invention prepared in Example 1 was treated for 60 minutes at 100 ° C. using ion-exchanged water of 15 times the amount of water, and the amount of silver eluted was determined to be 1.2. % And a small value within the measurement error. In this experiment, the product of the present invention was proved to be non-eluting.

The fabric for the product of the present invention described in Example 1 and the fabric for the comparative product are 120 by using 0.1% of the cationic dye Kayaacryl Blue BG-ED manufactured by Nippon Kayaku Co., Ltd. per weight of the fiber. After dyeing under normal dyeing conditions of ℃, one of the comparative fabrics is a normal dyeing condition of 130 ° C using Sumitomo Chemical Co., Ltd.'s disperse dye Sumikalon Blue E-FBL 0.2% per fiber weight. Then, the same silver treatment as in the method described in Example 1 was performed. Further, a finishing process for sweat absorption treatment was carried out by a padding method using 2% of a sweat absorbing agent SR-1800 manufactured by Takamatsu Oil & Fats Co., Ltd. by a padding method that is usually performed.
The antibacterial bacteriostatic activity value, the wicking property of water absorption performance, and the dust repellency were measured by the methods described in Example 1.
The bacteriostatic activity values of Staphylococcus aureus before and 10 times after washing were 4.3 and 4.0 for the product of the present invention, and 0.3 and 0.2 for the comparative product.
Wicking was 1 second or less for the product of the present invention and 3 seconds for the comparative product.
The dust repellency was 140 / L for the product of the present invention and 125 / L for the comparative product.
It can be seen that even if the silver treatment is performed after dyeing or the water absorption treatment is performed after the silver treatment, the water-absorbing and low dust-repellent product of the present invention having an excellent antibacterial effect can be obtained.
The products of the present invention described in the examples can be said to be antibacterial, water-absorbent, and a clean room class 100-compliant fabric.

Using the fabric for a product of the present invention described in Example 1, the treatment formulation described in Example 1 was treated at a temperature of 100 ° C. and a temperature of 120 ° C. for 40 minutes.
The initial silver amount in the treatment bath and the silver concentration after the treatment were measured with the ICPS analyzer described in the examples, and the amount of silver supported on the fiber was calculated.
The amount of silver was 294 PPM for the 100 ° C. processed product and 296 PPM for the 120 ° C. processed product.
The bacteriostatic activity value of the antibacterial index was 4.3 for the 100 ° C. processed product and 4.0 for the 120 ° C. processed product, both of which passed the antibacterial evaluation criteria.
Using these processed products, color photographs of the surface and cross section were taken using a scanning electron microscope JSM-7600F with an EDS detector manufactured by JEOL Ltd. (EDS detector: JED-2300, acceleration voltage: 30 kV). The distribution situation was investigated.
Although the difference in silver distribution from the photograph of the surface of the fabric is indistinguishable, the silver distribution in the direction of the fiber cross section seen from the photograph of the cross section of the fabric is compared to that the processed product at 120 ° C is evenly distributed to the inside. The 100 ° C. processed product had a more uneven distribution on the surface than the inside.
Therefore, the surface concentration is important when antibacterial performance is considered to be exerted on the surface silver, but lowering the treatment temperature in this way is one of the methods for intensively placing the antibacterial agent on the surface. It shows that it is one.

A special ring yarn having a thickness of 277 denier was prepared using a tri-twister twisting machine using three 75-denier polyester filament yarns (single yarn denier 0.52) having dyeability to the cationic dye. One was used as a core yarn, one was a sheath yarn, and one was used as a presser yarn. Using this special ring thread, a flat double woven fabric with a 100% ultrafine fiber rate was produced. The warp density and weft density of this fabric were 67 and 54 per inch. (Fabric for processing the present invention product)
On the other hand, the same special ring yarn was prepared using normal polyester processed yarn 75 denier 36 filament yarn (thickness is 277 denier). The configuration of the yarn was the same as that described above and the yarn having dyeability to the cationic dye. Using this special ring yarn, a woven fabric having a fine fiber conversion rate of 0%, which is the same standard as that for the processing fabric of the present invention, was prepared as a comparative processing fabric.
These fabrics were scoured, relaxed, dried, and heat-set by a conventional method, and then silver-treated by the method described in Example 1 to produce the product of the present invention and a comparative article.
The warp density of the product of the present invention after processing was 72 per inch, and the weft density was 58 per inch.
The comparative warp density was 72 per inch and the weft density was 59 per inch.
The amount of silver supported by these fabrics was 236 PPM for the inventive product and 2.5 PPM for the comparative product.
The bacteriostatic activity value of S. aureus was 4.5 for the product of the present invention and 0.3 for the comparative product.
The water absorption wicking property was 2 seconds for the product of the present invention and 10 seconds for the comparative product. The product of the present invention and the comparative product were cut into a size of 10 cm in length and width, measured for dry weight, soaked in water for 5 minutes, dehydrated for 1 minute with a dehydrator of a washing machine, and measured for dough weight. The water absorption calculated from the change in weight was 73% and 46%, respectively.
The dust repellency was 210 / L for the product of the present invention and 185 / L for the comparative product.
From these values, the product of the present invention is a low dust-repellent fabric excellent in antibacterial properties and water absorption.
The product of the present invention described in the examples is antibacterial, water-absorbing, and can be used as a fabric that is compatible with clean room class 100.
The comparative product had low dust repellency, but was poor in water absorption and not antibacterial.

A fabric for processing the product of the present invention was produced by increasing the warp density of the fabric for processing the product of Example 5 to 82 per inch and the weft density to 67 for the inch. Other than that, processing and silver processing were performed in exactly the same manner as described in Example 5 to produce the product of the present invention.
The warp density of the present invention product after processing was 85 per inch and the weft density was 70 per inch.
The silver carrying amount of the product of the present invention thus obtained was 205 PPM. The bacteriostatic activity value was 4.0, and the water wicking property was 1 second. The air permeability per square meter was 70 cc / second. The collection efficiency of particles of 0.5 microns or more was 90%. The collection efficiency of the product of the present invention is high and highly functional. The air permeability as a mask is required to be 30cc or more per square meter, but the product of the present invention has this basic performance, and the mask using the product of the present invention is antibacterial and has high filter performance. It can also be used as a mask. It is also water-absorbing and can be used as an antibacterial mask with excellent comfort. Furthermore, since it is composed of only ultrafine fibers, it can be used for a mask base fabric or the like that is soft and does not irritate the skin when it hits the skin.

For the warp, the polyester processed yarn 75 denier 144 filament having dyeability to the cationic dye described in Example 5 is used as the flower yarn and presser yarn, and the normal polyester processed yarn 75 denier 144 filament is used as the core yarn and the special ring yarn is used as the warp. An unwoven fabric of the same standard as in Example 5 was prepared using the weft. The ratio of the polyester processed yarn having dyeability to the cationic dye of this fabric was 72.5% by weight. In addition, the ultrathinning ratio of this fabric is 100%.
The fabric was scoured, relaxed, dried and heat-set by a conventional method, dyed with a cationic dye, and then silver-treated by the method described in Example 1 to produce a product of the present invention.
The silver carrying amount of the product of the present invention was 183 PPM. The bacteriostatic activity value of S. aureus was 3.5.
The water wicking property was 2 seconds. The water absorption measured by the method described in Example 5 was 59%.
The dust repellency of the product of the present invention was 235 / L.
From these values, the product of the present invention is a low dust-repellent fabric excellent in antibacterial properties and water absorption.
The product of the present invention described in the examples is antibacterial, water-absorbing, and can be used as a fabric such as a hook corresponding to a clean room class 200.

The polyester processed yarn 75 denier 144 filaments having dyeability to the cationic dye was scoured and washed in the same manner as usual in a cheese form using a cheese dyeing machine, and then antibacterial processing was carried out. The antibacterial processing conditions were as follows: a silver lactate solution of 949 PPM per yarn weight was dissolved in ion-exchanged water to prepare a processing solution, and this processing solution was used at a ratio of 10 times the yarn weight. For 20 minutes.
After the processing, it was thoroughly washed with ion-exchanged water, dried and set by a usual method to obtain an antibacterial processed yarn in which the antibacterial agent of the present invention was unevenly distributed and adsorbed on the surface of the yarn cross section.
The silver adsorption amount of the product of the present invention was 185 PPM.
The antibacterial agent silver is unevenly distributed and adsorbed on the fiber surface using a scanning electron microscope JSM-7600F with an EDS detector manufactured by JEOL Ltd. (EDS detector: JED-2300, acceleration voltage: 30 kV). It was confirmed by a color photograph of a cross section showing the silver distribution of the yarn measured using the yarn.
The antibacterial property of the processed yarn of the present invention was examined by the method described in Example 2. It was confirmed that the antibacterial processed yarn of the present invention was a non-eluting type antibacterial yarn in which no halo was observed.

According to the product of the present invention, fibers, yarns and fabrics having antibacterial properties and water absorption can be obtained.
Furthermore, since the antibacterial property of the product of the present invention is a non-eluting type antibacterial property, the product of the present invention exhibits excellent features that have never been seen when used in an application field where the dissolution of an antibacterial agent is a problem.

Further, if the yarn to be used is composed only of filament yarns, it is possible to reduce dust generation.

Furthermore, by designing the fabric by adjusting the density of the fabric, it is possible to adjust the air permeability or adjust the dust collection efficiency.
These functions have material characteristics that can be used in clean room-related environments, leading to the proposal of new products and new products for new applications.

That is, there are many new fields that can be used in the industry that can exhibit such performance and characteristics.

Specifically, uniforms in hospitals, food-related factories, biological-related research facilities and factories, food-service restaurants, restaurants and other uniforms, and towels, hookins, wiping materials and packaging used in these facilities and factories It can also be used as a fiber material such as a material and a mask.

If a dense high-density fabric is made, it can be used as a hamburger bag fabric for storing surgical gowns, bedding, bedspreads, etc. used in hospitals.

Furthermore, it can be preferably used for sterilization and sterilization sheets in water-related facilities, filters, and the like. It can also be used as a filter that combines water decontamination, water sterilization, and sterilization.

Not only in factories and research facilities, but also in everyday life, it can be used as familiar new functional products such as hookins, towels, masks, and shopping bags.

Claims (11)

A non-eluting antibacterial single yarn of 1.1 denier or less ultrafine polyester fiber, which has a dyeability in a cationic dye, contains an antibacterial metal compound, and a large number of antibacterial metal compounds are arranged in the surface direction of the fiber cross section. Ultrafine fiber yarn having antibacterial properties and water absorption An ultrafine fiber fabric having antibacterial properties and water absorption, comprising the ultrafine fiber yarn according to claim 1. The antibacterial composition according to claim 1, wherein the non-eluting antibacterial single yarn 1.1 denier or less ultrafine polyester fiber is composed of silver-carrying non-eluting antibacterial single yarn 1.1 denier or less ultrafine polyester fiber. And fiber absorbency An ultrafine fiber fabric having antibacterial properties and water absorption, comprising the ultrafine fiber yarn according to claim 3. The anti-bacterial and water-absorbing ultra-fine fiber yarn of 1.1 denier or less having an anti-bacterial property and water-absorbing property of 50% or more in weight ratio, a non-eluting anti-bacterial single yarn 1 .Ultrafine fiber yarn having antibacterial and water absorption properties in which the proportion of ultrafine fiber of 1 denier or less is 30% or more by weight Non-eluting type antibacterial single yarn 1 having a microfiber ratio of 1.1 denier or less of the single yarn of the ultrafine fiber fabric having antibacterial and water absorption properties according to claim 2 and claim 4 in a weight ratio of 50% or more. Ultrafine fiber fabric having antibacterial properties and water absorption, wherein the proportion of ultrafine fibers of 1 denier or less is 30% or more by weight It consists of non-eluting antibacterial single yarn 1.1 denier or less ultrafine polyester fiber obtained by adsorption treatment in a bath with an ultrafine polyester fiber having a dyeability of cationic dyes of 1.1 denier or less. The ultrafine fiber yarn having antibacterial properties and water absorption properties according to claim 1, claim 3, and claim 5. 7. The fabric according to claim 2, 4 or 6, which is obtained by subjecting a fabric composed of an ultrafine fiber yarn of 1.1 denier or less having a dyeability to a cationic dye in a bath with a silver compound. Ultrafine fiber fabric with antibacterial and water absorption properties A mask using the ultrafine fiber fabric according to claim 2, 4, 6, or 8. A cleaning article using the ultrafine fiber fabric according to claim 2, 4, 6, or 8. A filter using the ultrafine fiber fabric according to claim 2, 4, 6, or 8.