Method for producing deodorizing antibacterial fiber structure, and deodorizing antibacterial fiber structure

Abstract

The present invention provides a deodorizing antibacterial fiber structure that can sufficiently eliminate perspiration odor while also having high wash durability and safety as well as a favorable impression on consumers, and also provides a method for producing the same. To this end, said method comprises applying a heat treatment of more than 100°C and up to 200°C under normal or pressurized conditions for 0.5 minutes or longer while a treatment liquid (6) is in contact with a fiber structure (2), wherein if the treatment liquid (6) contains an organic acid and phosphinic acid, the fiber structure (2) contains cotton fibers, and if the treatment liquid (6) contains an organic acid and an acrylic resin and / or titanium dioxide, the fiber structure (2) contains synthetic fibers.

Description

Manufacturing method for deodorizing and antibacterial fiber structure, deodorizing and antibacterial fiber structure

[0001] The present invention relates to a method for producing a deodorizing and antibacterial fiber structure, and a deodorizing and antibacterial fiber structure, and more particularly to a method for producing a deodorizing and antibacterial fiber structure that has excellent washing durability, excellent deodorizing ability against sweat odor, and antibacterial properties, and a deodorizing and antibacterial fiber structure.

[0002] Conventionally, textile deodorizing agents in which organic acids, titanium oxide, and alumina silicates, which are believed to have deodorizing effects, are fixed to fibers with a binder resin have been widely used (see, for example, Patent Documents 1 and 2). However, although these agents have excellent deodorizing properties, they also deteriorate the texture, which is important for clothing. Furthermore, they lack sufficient washing durability, and there is a problem that the desired deodorizing properties cannot be obtained after repeated washing, for example, 10 or more times. Moreover, because titanium oxide and alumina silicates are insoluble substances, adding large amounts to improve washing durability may cause whitening or white spots on fibers. On the other hand, although water-soluble substances such as organic acids do not cause whitening or white spots on fibers even when added in large amounts, it is difficult to improve washing durability simply by adding them. Furthermore, Patent Document 2 discloses the formation of metal complexes by using these organic acids in combination with sodium, silver, copper, and zinc, which can form complexes with these organic acids. However, the deodorizing effects of these metal complexes are weak, and even metal complexes of acetic acid, which have the greatest deodorizing effects, have weaker deodorizing effects than organic acids.

[0003] In recent years, there has been a trend toward requiring safety in sportswear, clothing, bedding, etc., and also toward placing importance on the image that consumers perceive. From these points of view, the deodorizing ingredients in textile deodorizing agents are required to be highly safe and have a good image that consumers perceive. However, it is not easy to deodorize sweat odors in particular while ensuring safety and washing durability, and the reality is that no agent that meets these requirements exists.

[0004] That is, sweat odors consist of alkaline odors (e.g., odors caused by ammonia) and acidic odors (e.g., odors caused by acetic acid and isovaleric acid). However, when a deodorizing component that addresses alkaline odors is mixed with a deodorizing component that addresses acidic odors, the deodorizing properties of each component are inactivated, making it difficult to deodorize both alkaline odors and acidic odors.

[0005] For example, Patent Document 3 describes a fiber structure in which carboxyl groups (citric acid, malic acid, tartaric acid) are introduced into natural or synthetic fibers without using a binder resin. However, in reality, these organic acids are not covalently bonded to the fibers, so it is thought that they do not exhibit sufficient washing durability. Moreover, carboxyl groups (citric acid, malic acid, tartaric acid) alone cannot deodorize the acidic odors of acetic acid and isovaleric acid.

[0006] Japanese Patent Application Laid-Open No. H04-163372 Japanese Patent Application Laid-Open No. H10-292263 Japanese Patent Application Laid-Open No. 2013-067918

[0007] Under these circumstances, the present invention provides a deodorizing and antibacterial fiber structure that can sufficiently deodorize complex odors such as sweat odor, has high washing durability and safety, has antibacterial properties, and is well-received by consumers, and a method for producing the same.

[0008] However, in view of these circumstances, the present inventors have conducted extensive research and have found that a deodorizing and antibacterial fiber structure obtained by contacting a fiber structure with a treatment liquid containing specific components and then performing a heat treatment under specific conditions can sufficiently deodorize sweat odor, and is highly durable to washing, safe, and has antibacterial properties, resulting in a deodorizing and antibacterial fiber structure that is well-received by consumers.

[0009] That is, the present invention has the following aspects. [1] A method for producing a deodorizing and antibacterial fiber structure, comprising contacting a fiber structure with a treatment liquid and subjecting the fiber structure to a heat treatment at a temperature exceeding 100°C and not exceeding 200°C under normal or increased pressure for 0.5 minutes or more, wherein the treatment liquid contains an organic acid and phosphinic acid when the fiber structure contains cotton fibers, and the treatment liquid contains an organic acid and an acrylic resin and / or titanium oxide when the fiber structure contains synthetic fibers. [2] A method for producing a deodorizing and antibacterial fiber structure according to [1], wherein the organic acid contained in the treatment liquid is one or more selected from the group consisting of citric acid, malic acid, and tartaric acid. [3] A method for producing a deodorizing and antibacterial fiber structure according to [1] or [2], wherein the treatment liquid further contains titanium oxide when the treatment liquid contains an organic acid and phosphinic acid. [4] A method for producing a deodorizing and antibacterial fiber structure according to any of [1] to [3], wherein the heat treatment is followed by a soaping treatment with an alkaline solution and / or water. [5] A method for producing a deodorizing and antibacterial fiber structure according to any one of [1] to [4], wherein, when the treatment liquid contains an organic acid and an acrylic resin, the mass ratio of the acrylic resin to the organic acid (acrylic resin / organic acid) is set to 0.1 to 5. [6] A method for producing a deodorizing and antibacterial fiber structure according to any one of [1] to [5], wherein, when the treatment liquid contains an organic acid and a phosphinic acid, the mass ratio of the phosphinic acid to the organic acid (phosphinic acid / organic acid) is set to 0.05 to 10. [7] A method for producing a deodorizing and antibacterial fiber structure according to [1] to [6], wherein, when the treatment liquid contains an organic acid and titanium oxide, the mass ratio of the titanium oxide to the organic acid (titanium oxide / organic acid) is set to 0.1 to 5. [8] A method for producing a deodorizing and antibacterial fiber structure according to any one of [1] to [6], wherein, when the treatment liquid contains an organic acid and titanium oxide, the mass ratio of the titanium oxide to the organic acid (titanium oxide / organic acid) is set to 0.1 to 5. ２ and phosphinic acid is 0.05 to 10 g / m ２ [9] A deodorizing and antibacterial fiber structure having a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103). ２and acrylic resin is 0.05 to 5 g / m ２

[10] A deodorizing and antibacterial fiber structure having a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103). ２ and titanium oxide is 0.1 to 10 g / m ２

[11] A deodorizing and antibacterial fiber structure having cotton fibers, obtained by contacting a fiber structure with a treatment liquid containing an organic acid and phosphinic acid and then subjecting the fiber structure to a heat treatment at a temperature above 100°C and not exceeding 200°C under normal pressure or pressure for 0.5 minutes or more, wherein the deodorizing and antibacterial fiber structure has a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103).

[12] A deodorizing and antibacterial fiber structure having synthetic fibers, obtained by contacting a fiber structure with a treatment liquid containing an organic acid and an acrylic resin and / or titanium oxide, and then subjecting the fiber structure to a heat treatment of more than 100°C and not more than 200°C under normal pressure or pressure for 0.5 minutes or more, wherein the deodorizing and antibacterial fiber structure has a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103).

[0010] When a deodorizing and antibacterial fiber structure is produced by contacting a treatment liquid with a fiber structure and then subjecting the fiber structure to a heat treatment of more than 100°C and not more than 200°C under normal pressure or under pressure for 0.5 minutes or more, if the fiber structure contains cotton fibers, the treatment liquid contains an organic acid and a phosphinic acid, and if the fiber structure contains synthetic fibers, the treatment liquid contains an organic acid and an acrylic resin and / or titanium oxide, so that the components contained in the treatment liquid can be fixed to the surface of the fiber structure, and the resulting deodorizing and antibacterial fiber structure can sufficiently deodorize sweat odor, has high deodorizing and antibacterial properties that are durable to washing, and is also safe, allowing for a good image that is well received by consumers.

[0011] 1A and 1B are diagrams illustrating an example of a method for bringing a treatment liquid into contact with a fiber structure and heating the same in one embodiment of the present invention.

[0012] The present invention will be described below based on examples of embodiments for carrying out the present invention, but the present invention is not limited to the embodiments described below.

[0013] As used herein, "x and / or y (x and y are any configuration)" refers to at least one of x and y, and can mean three things: x only, y only, or x and y. In this specification, when "X to Y" (X and Y are any numbers) is used, unless otherwise specified, it also means "X or more and Y or less," as well as "preferably greater than X" or "preferably smaller than Y." In this specification, when "X or more" (X is any number) or "Y or less" (Y is any number) is used, it also means "preferably greater than X" or "preferably less than Y." For numerical ranges described in stages in this specification, the upper or lower limit of a certain numerical range can be arbitrarily combined with the upper or lower limit of another numerical range. Furthermore, in the numerical ranges described herein, the upper or lower limit of the numerical range can also be replaced with the values ​​shown in the examples.

[0014] In this embodiment, the fiber structure to be imparted with deodorizing and antibacterial properties is the fiber itself or a product made from such a fiber. The fiber structure prepared before imparting the deodorizing and antibacterial properties may be in the form of the final product as is, or the fiber structure may be modified or combined with other components to change its shape or configuration to form the final product.

[0015] Such fiber structures can be in various forms, such as yarn, knitted fabric, woven fabric, nonwoven fabric, etc. Specific products include, for example, various types of clothing, socks, tights, sportswear, outdoor products, bedding, rugs, curtains, indoor cloths, and sanitary products such as bandages, gauze, and masks. In particular, the fiber structure of the present invention has excellent washing durability, can deodorize sweat odors, and has antibacterial properties, making it suitable for application to sportswear, clothing, socks, tights, outdoor products, and bedding.

[0016] The types of fibers that serve as the raw material for the textile structure include cotton, linen, wool, silk, and other natural fibers; synthetic fibers such as polyester resins, polyamide resins, acrylic resins, and polyurethane resins; semi-synthetic fibers such as cellulose resins and acetate resins; and composites and mixtures thereof. Other examples include synthetic fibers mixed with components other than synthetic fibers (metals, inorganic substances, etc.), and blends of synthetic fibers with natural fibers (cotton, wool, silk, etc.) or semi-synthetic fibers (acetate, rayon, etc.). The method for producing a deodorizing and antibacterial textile structure and the deodorizing and antibacterial textile structure of this embodiment will be described in detail below.

[0017] <<First Embodiment>> A method for producing a deodorizing and antibacterial fiber structure according to a first embodiment is a method for producing a deodorizing and antibacterial fiber structure by bringing a treatment liquid into contact with a fiber structure and then performing a heat treatment at a temperature exceeding 100°C and not exceeding 200°C for 0.5 minutes or more under normal pressure or pressure, wherein the treatment liquid contains an organic acid and a phosphinic acid, and the fiber structure contains cotton fibers.

[0018] (Textile structure) The textile structure used in the first embodiment has cotton as a textile raw material, but it may have only cotton or may contain other fibers (blended textiles). Even when other fibers are contained, from the viewpoint of deodorizing acidic odors, the cotton content in the textile structure is preferably 30% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more.

[0019] (Treatment Liquid) The treatment liquid used in the first embodiment is an aqueous solution in which an organic acid and phosphinic acid are dissolved in water, but in some cases, a solution or dispersion using an organic solvent as the solvent may be used. Examples of the organic acid include citric acid, malic acid, tartaric acid, succinic acid, salicylic acid, fumaric acid, adipic acid, gallic acid, and sorbic acid. Of these, citric acid, malic acid, tartaric acid, succinic acid, salicylic acid, and fumaric acid are preferably used, and citric acid, malic acid, and tartaric acid are more preferably used.

[0020] The concentration of the organic acid in the treatment liquid can be flexibly set depending on the basis weight of the fiber structure and the mass to be fixed to the fiber structure. ２ When fixing the fiber structure, the basis weight of the fiber structure is 1014 g / m ２ For example, cotton canvas No. 1 (old JIS L 3102) of 1014 g / m can be fixed by applying 200% by mass of a treatment liquid containing 0.5% by mass of organic acid (200% squeeze). ２ ×2×0.005=10g / m ２

[0021] It is also preferable to set the organic acid concentration in the treatment liquid and the amount of the organic acid applied (squeezing rate) according to the properties of the fiber structure itself (for example, fiber density). ２ In the case of polyester taffeta, by attaching 50% by mass of a treatment liquid containing 28% by mass of organic acid (50% squeeze), the fiber structure was coated with 10 g / m of organic acid. ２However, since the density of the polyester taffeta fiber structure is low, by attaching 50% by mass of a treatment liquid containing 1% by mass of organic acid (50% squeeze), the organic acid content of 0.36 g / m ２ may be fixed.

[0022] That is, although the basis weight varies depending on the fiber structure, the deodorizing property is determined by the fixed mass of the deodorizing component per unit area, regardless of the basis weight of the fiber structure. When the density of the fiber structure is high, if the amount of liquid applied is increased, the fiber structure becomes too heavy and cannot be sufficiently squeezed, so it is preferable to reduce the amount of liquid applied and set the amount of organic acid fixed to the fiber structure.

[0023] As with the organic acid, the concentration of the phosphinic acid in the treatment liquid can be flexibly set depending on the basis weight of the fiber structure and the mass to be fixed to the fiber structure.

[0024] The mass ratio of the phosphinic acid to the organic acid (phosphinic acid / organic acid) is preferably set to 0.05 to 10, more preferably 0.05 to 1, and even more preferably 0.05 to 0.5, from the viewpoint of ammonia deodorizing power.

[0025] The treatment liquid may contain components other than the organic acid and the phosphinic acid. Examples of such components include an acrylic resin and titanium oxide. The inclusion of an acrylic resin tends to improve washing durability. Furthermore, the inclusion of titanium oxide tends to improve deodorizing properties for isovaleric acid.

[0026] When the treatment liquid contains an organic acid and an acrylic resin, from the viewpoint of deodorizing properties against acidic odors, the mass ratio of the acrylic resin to the organic acid (acrylic resin / organic acid) is preferably 0.1 to 5, more preferably 0.1 to 3, and even more preferably 0.3 to 2.

[0027] When the treatment liquid contains an organic acid and titanium oxide, from the viewpoint of deodorizing properties against acidic odors, the mass ratio of the titanium oxide to the organic acid (titanium oxide / organic acid) is preferably 0.1 to 5, more preferably 0.1 to 3, and even more preferably 0.5 to 2.

[0028] In addition to the above, the treatment liquid may contain various additives, such as swelling agents, penetrating agents, emulsifying / dispersing agents, sequestering agents, leveling agents, softeners, suspending agents, migration inhibitors, carriers, dye-resistant agents, wrinkle-resistant agents, and texture-improving agents, as needed.

[0029] Furthermore, in the treatment liquid, depending on the types of auxiliary agents and additives used, the material of the target fiber structure, etc., water-soluble organic solvents such as ethanol, n-propanol, ethylene glycol, etc. can be used together with or instead of water. In some cases, non-aqueous solvents can also be used.

[0030] (Contact Method and Heat Treatment) The method for contacting the treatment liquid with the fiber structure and the method for heating the same can be appropriately selected depending on the type and material of the fiber structure to be treated. For example, as shown in FIG. 1 , a method in which a fiber structure 2 is immersed in a treatment liquid 6 and heat-treated in that state at a predetermined temperature and a predetermined pressure can be mentioned. That is, water is poured into a treatment tank 1 for immersing the fiber structure 2 to be treated, and a processing preparation liquid (one-component or two-component) is poured into this water to prepare a predetermined treatment liquid 6. The fiber structure 2 is then immersed in the treatment liquid 6 in the treatment tank 1, and is then pulled up while being gently squeezed through squeeze rolls 3 and introduced into a heating device 4. The fiber structure 2 to which a predetermined amount of the treatment liquid 6 has been attached is subjected to a heat treatment (so-called "pad-drying") at a predetermined temperature (greater than 100°C and not more than 200°C) for a predetermined time (0.5 minutes or more) while being moved within the heating device 4, and is then dried via a dryer 5 as needed.

[0031] Another method for contacting the treatment liquid with a fiber structure is to apply the treatment liquid to the fiber structure by immersion (impregnation), spraying, coating, etc. under normal pressure, squeeze the fiber structure to a predetermined squeezing rate using a mangle or centrifuge, etc., and then heat-treat the fiber structure under normal pressure or pressure.

[0032] The heat treatment in the state where the treatment liquid is in contact with the fiber structure is carried out under normal pressure or under pressure. The heat treatment temperature is greater than 100°C and not greater than 200°C, preferably 130 to 180°C, and more preferably 140 to 160°C. If the heat treatment temperature is less than 100°C, the fiber structure is not heated sufficiently, and the components tend to be insufficiently fixed. Conversely, if the heat treatment temperature exceeds 200°C, the fiber structure tends to be damaged. The heat treatment time is 0.5 minutes or more, preferably 0.5 to 10 minutes, and more preferably 0.5 to 3 minutes.

[0033] (Soaping Treatment) After the heat treatment, the fiber structure is preferably soaped with an alkaline solution and / or water to remove excess components from the surface of the fiber structure and promote the fixation of the deodorizing and antibacterial components. The pH of the alkaline solution is preferably 8 to 12, more preferably 10 to 12, from the viewpoint of preventing the loss of the deodorizing properties of the organic acid. Examples of such alkaline solutions include aqueous solutions of alkaline inorganic salts such as sodium carbonate, calcium carbonate, sodium sulfate, and sodium phosphate. The fiber structure after the soaping treatment is then rinsed with water or the like as needed and dried to obtain the desired deodorizing and antibacterial fiber structure. The soaping treatment may be repeated; it is more preferable to perform soaping with water after soaping with the alkaline solution.

[0034] The deodorizing and antibacterial fiber structure thus obtained is a fiber structure having cotton fibers and an organic acid in an amount of 0.1 to 10 g / m ２ In particular, from the viewpoint of deodorizing alkaline odors, 0.5 to 10 g / m ２It is preferable that the density is fixed, and more preferably 0.5 to 6 g / m ２ , more preferably 1 to 4 g / m ２ is.

[0035] The deodorizing and antibacterial fiber structure is a fiber structure having cotton fibers, and phosphinic acid is added in an amount of 0.05 to 10 g / m ２ In particular, from the viewpoint of deodorizing alkaline odors, 0.5 to 5 g / m ２ is preferable, and more preferably 0.5 to 4 g / m ２ , more preferably 1 to 3 g / m ２ is.

[0036] When the deodorizing and antibacterial fiber structure contains titanium oxide, the amount of titanium oxide in the fiber structure containing cotton fibers is set to 0.1 to 10 g / m from the viewpoint of deodorizing isovaleric acid. ２ It is preferable that the amount of the adhesive is fixed, and more preferably, it is 0.5 to 5 g / m ２ and more preferably 1 to 3 g / m ２ is.

[0037] In this way, when a predetermined amount of organic acid and phosphinic acid are fixed to the fiber structure having cotton fibers, the deodorizing and antibacterial fiber structure is endowed with deodorizing properties such that the deodorizing rates for ammonia, acetic acid, and isovaleric acid are each 70% or more after 10 home washes at 40°C, and antibacterial properties such that the antibacterial activity value according to JIS L 1902:2015 is 2.0 or more.

[0038] It is believed that the deodorizing properties are due to the fact that a composite film consisting of the organic acid and phosphinic acid, etc., is formed on the surface of the fiber structure by performing a heat treatment and preferably a soaping treatment under specified conditions, and this composite film has the property of adsorbing both alkaline and acidic odors. Furthermore, because this composite film is firmly fixed to the fiber structure, almost no decrease in deodorizing properties is observed even after 10 home washes at 40°C, and it is thought that a fiber structure can be obtained in which the deodorizing properties for ammonia, acetic acid, and isovaleric acid are each 70% or more after 10 washes.

[0039] It is presumed that the antibacterial properties are due to the organic acid contained in the composite coating formed on the fiber structure. Since the antibacterial properties were maintained even after 10 washes, it can be said that the deodorizing and antibacterial fiber structure of this embodiment has durable antibacterial properties.

[0040] Home washing at 40°C is a washing method specified in 103 of Appendix 1 of JIS L 0217 "Symbols and Labeling Methods for Handling of Textile Products" (1995). Specifically, a household electric washing machine is filled with water at 40±2°C to a bath ratio of 1:30, an alkaline synthetic detergent is added and dissolved, the laundry is washed for 5 minutes under strong conditions, the laundry is drained and spun, the laundry is rinsed and spun for 2 minutes, and then the laundry is rinsed and spun for another 2 minutes. This cycle is counted as one cycle. "After 10 washes" refers to the result of repeating this cycle 10 times. In this embodiment, the textile structure after the final spin cycle is hung to dry and used as a deodorizing and antibacterial textile structure.

[0041] (Deodorizing Property) In the present embodiment, the evaluation of deodorizing property is carried out in accordance with the performance test method for deodorizing processed textile products (ISO 17299-3 gas chromatography method) as follows. ２ Each test piece was cut into 1 / 4" pieces to prepare a sample piece, and 5 μL of odor components adjusted for each odor was injected into a 500 mL Erlenmeyer flask containing the sample piece. After 2 hours, the flask was vigorously stirred and the odor concentration was measured using a gas chromatograph. At this time, the same procedure was performed without adding the sample piece, and the odor concentration measured was used as the blank test concentration, and the deodorizing rate (%) was calculated based on the following formula. Therefore, the larger the deodorizing rate (%), the better the deodorizing properties. Deodorizing rate (%) = (1 - (sample piece concentration) / (blank test concentration)) x 100

[0042] (Antibacterial Property) In the present embodiment, the antibacterial property is evaluated by the following method in accordance with JIS L 1902. That is, Staphylococcus aureus or Klebsiella pneumoniae was inoculated into a standard piece (cotton fabric not exhibiting antibacterial activity) and a sample piece obtained by cutting the target fiber structure, and after culturing at 37°C for 18 to 24 hours, the viable cell count of each piece was measured. The antibacterial activity value was calculated from the obtained viable cell counts according to the following formula.

[0043] Antibacterial activity value = (LogCt - LogCo) - (LogTt - LogTo) Growth value of standard specimen = (LogCt - LogCo) LogCo: Common logarithm of the arithmetic mean of the viable bacterial count on the standard specimen immediately after inoculation with the test bacteria LogCt: Common logarithm of the arithmetic mean of the viable bacterial count on the standard specimen after 18 hours of culture LogTo: Common logarithm of the arithmetic mean of the viable bacterial count on the sample specimen immediately after inoculation with the test bacteria LogTt: Common logarithm of the arithmetic mean of the viable bacterial count on the sample specimen after 18 hours of culture

[0044] According to this embodiment, it is possible to obtain durable deodorizing properties against both alkaline and acidic odors, and durable antibacterial properties, without using highly toxic deodorants, antibacterial agents, etc. Therefore, the deodorizing and antibacterial fiber structure of this embodiment can be suitably used in clothing and non-clothing applications such as clothing and bedding, gloves, hats, futon covers, curtains, tents, and the like, which come into direct contact with the skin and are prone to absorbing sweat.

[0045] <<Second Embodiment>> The method for producing a deodorizing and antibacterial fiber structure of the second embodiment differs from the first embodiment in the treatment liquid and fiber structure, but is otherwise the same as the first embodiment and produces the same effects.

[0046] (Fiber structure) That is, the fiber structure used in the second embodiment has synthetic fibers as the fiber raw material, but it may have only synthetic fibers or may contain other fibers (blended fibers). When other fibers are contained, from the viewpoint of fixation of the organic acid, the synthetic fibers are preferably contained in the fiber structure at 50 mass% or more, more preferably 60 mass% or more, and even more preferably 70 mass% or more. Examples of the synthetic fibers include polyester fibers, polyamide fibers, acrylic fibers, and urethane fibers, and among these, polyester fibers are preferably used.

[0047] (Treatment Liquid) The treatment liquid used in the second embodiment is an aqueous solution in which an organic acid and an acrylic resin and / or titanium oxide are dissolved and dispersed in water, but in some cases, a solution or dispersion using an organic solvent as the solvent may be used.

[0048] The organic acid may be the same as that used in the first embodiment, and the preferred and more preferred ones are also the same as those in the first embodiment. As described in the first embodiment, the concentration of the organic acid in the treatment liquid can also be flexibly set depending on the basis weight of the fiber structure and the mass to be fixed to the fiber structure, and the calculation method is also the same.

[0049] The acrylic resin can be a general acrylic binder used as an adhesive or binder for clothing, textiles, etc. Among these, those with a glass transition temperature (TG) of -50°C or higher and lower than 70°C are preferred because of their excellent texture. Furthermore, the acrylic resin is preferably one in which silica or the like is not bonded to the resin terminal. This is because, if silica or the like is bonded to the resin terminal, the function of the terminal group that contributes to deodorizing properties tends to be inhibited. Furthermore, the acrylic resin preferably has a solids content of 10 to 80% by mass, and in particular, from the viewpoints of viscosity and cost, those with a solids content of 20 to 70% by mass are preferably used.

[0050] Examples of the titanium oxide include those having an average particle size of 0.001 to 10 μm, and among these, those having an average particle size of 0.001 to 1 μm are preferred from the viewpoint of dispersibility. The average particle size is a value calculated based on a logarithmic scale using a laser diffraction particle size distribution analyzer. As described in the first embodiment, the concentration of titanium oxide in the treatment liquid can be flexibly set depending on the basis weight of the fiber structure and the mass to be fixed to the fiber structure, and the calculation method is also the same.

[0051] When the treatment liquid contains an organic acid and an acrylic resin, from the viewpoint of deodorizing properties against acidic odors, the mass ratio of the acrylic resin to the organic acid (acrylic resin / organic acid) is preferably 0.1 to 5, more preferably 0.1 to 3, and even more preferably 0.3 to 2.

[0052] When an organic acid and titanium oxide are contained, the mass ratio of the titanium oxide to the organic acid (titanium oxide / organic acid) is preferably 0.1 to 5, more preferably 0.1 to 3, and even more preferably 0.5 to 2, from the viewpoint of deodorizing properties against acidic odors.

[0053] In addition to the above, the treatment liquid may contain various additives, such as swelling agents, penetrating agents, emulsifying / dispersing agents, sequestering agents, leveling agents, softeners, suspending agents, migration inhibitors, carriers, dye-resistant agents, wrinkle-resistant agents, and texture-improving agents, as needed.

[0054] Furthermore, in the treatment liquid, depending on the types of auxiliary agents and additives used, the material of the target fiber structure, etc., water-soluble organic solvents such as ethanol, n-propanol, ethylene glycol, etc. can be used together with or instead of water. In some cases, non-aqueous solvents can also be used.

[0055] The deodorizing and antibacterial fiber structure of the second embodiment contains an organic acid in an amount of 1 to 10 g / m ２ In particular, from the viewpoint of deodorizing alkaline odors, 0.5 to 5 g / m ２ It is preferable that the density is fixed, and more preferably 0.5 to 6 g / m ２ , more preferably 1 to 4 g / m２ is.

[0056] The deodorizing and antibacterial fiber structure of the second embodiment has a fiber structure containing titanium oxide at a concentration of 0.1 to 10 g / m ２ In particular, from the viewpoint of deodorizing properties against isovaleric acid, 0.1 to 5 g / m ２ It is preferable that the amount of the adhesive is fixed, and more preferably, it is 0.3 to 3 g / m ２ is.

[0057] According to this embodiment, it is possible to impart deodorizing and antibacterial properties to synthetic fibers that have traditionally been difficult to process. That is, a textile structure having durable deodorizing properties against both alkaline and acidic odors and high antibacterial properties can be obtained without using highly toxic deodorizing agents, antibacterial agents, etc. Such textile structures are suitable for use in clothing and non-clothing applications, such as clothing, bedding, gloves, hats, futon covers, curtains, and tents, which come into direct contact with the skin and are prone to absorbing sweat.

[0058] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples as long as it does not depart from the gist of the invention. In the examples, "%" means by mass.

[0059] <Treatment liquid> A treatment liquid was prepared by blending the components shown below to obtain the composition shown in Table 1 below. The components contained in this treatment liquid are as follows: Organic acid (citric acid, malic acid, tartaric acid, all manufactured by Wako Pure Chemical Industries, Ltd.) Titanium oxide (SSP-N, manufactured by Sakai Chemical Industry Co., Ltd.) Acrylic resin (AX-30, manufactured by Kitahiro Chemical Co., Ltd.) Dispersant (SN-PW-43, manufactured by San Nopco Ltd.) Thickener (special grade hydroxyethyl cellulose, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) Urethane resin (Bondic 1640NE, manufactured by Bondic Japan Co., Ltd.) Glyoxal resin (Riken Resin MS250, manufactured by Miki Riken Co., Ltd.)

[0060] <Textile Structure> Details of each of the target textile structures are as follows: Cotton (1): 100% cotton, basis weight 96.5 g / m ２ , Cotton gold cloth, manufactured by Irozome Co., Ltd. Cotton (2): 100% cotton, basis weight 1014 g / m ２, Cotton canvas No. 1, manufactured by Kobo Ichi Co., Ltd. PET (1): 100% PET, basis weight 158 ​​g / m ２ , Polyester tropical, manufactured by Irozome Co., Ltd. PET (2): 100% PET, basis weight 72 g / m ２ , polyester taffeta, manufactured by Shikisensha

[0061] [Example 1] <0 washes> A treatment liquid as shown in Table 1 was prepared, and a fiber structure as shown in Table 1 below was immersed in a treatment tank filled with this treatment liquid. The fiber structure was then pulled up while being squeezed through squeeze rolls so that a predetermined amount of the treatment liquid was present relative to the amount of fiber structure material (squeezing rate), and the fiber structure was heat-treated at 160°C for 1 minute while moving through a pin tenter (PT-2A, manufactured by Tsujii Senki Co., Ltd.), to obtain a deodorizing and antibacterial fiber structure (0 washes). <Soaping 0 times washing> Next, the deodorizing and antibacterial fiber structure (soaping 0 times washing) was immersed in an alkaline solution (1% aqueous sodium carbonate solution at 80°C) for 2 seconds, then passed through a squeeze roll to squeeze the treated liquid to 100% of the fiber structure material, and pulled up while squeezing. The structure was further immersed in water (room temperature) for 2 seconds, then passed through a squeeze roll to squeeze the treated liquid to 100% of the fiber structure material, and pulled up while squeezing. The structure was then heat-treated at 130°C for 1 minute while moving through a pin tenter (PT-2A, manufactured by Tsujii Senki Co., Ltd.) to obtain a deodorizing and antibacterial fiber structure (soaping 0 times washing). <Soaping 10 times washing> The deodorizing and antibacterial fiber structure (soaping 0 times washing) was washed 10 times at 40°C according to the standard washing method specified in the "SEK Mark Textile Product Washing Method" and then air-dried overnight to obtain a deodorizing and antibacterial fiber structure (soaping 10 times washing).

[0062] [Examples 2 to 17, Comparative Examples 1 to 5] Deodorizing and antibacterial fiber structures were obtained in the same manner as in Example 1, except that the treatment liquid and / or fiber structure was changed to those shown in Tables 1 to 4 below, with the fibers washed 0 times, washed 0 times with soaping, and washed 10 times with soaping.

[0063] The deodorizing and antibacterial properties of the obtained Example and Comparative Examples were measured using the methods described above in the (Deodorizing) and (Antibacterial) sections, and evaluated based on the following indices. The results are shown in Tables 1 to 4 below. Note that the antibacterial properties were measured and evaluated only after 10 washes and soaping.

[0064] <Deodorizing performance> ◎ (excellent)... 70% or more 〇 (very good)... 50% or more but less than 70% × (poor)... Less than 50%

[0065] <Antibacterial properties> ◯ (very good): Antibacterial activity value of 2.0 or more × (poor): Antibacterial activity value of less than 2.0

[0066]

[0067]

[0068]

[0069]

[0070] Furthermore, based on the results in Tables 1 to 4, the amount of each component fixed to the deodorizing and antibacterial fiber structures obtained in each Example and Comparative Example was calculated and is shown in Tables 5 to 8 below.

[0071]

[0072]

[0073]

[0074]

[0075] The results shown in Tables 1 to 8 show that Examples 1 to 17 deodorized both alkaline odors (ammonia) and acidic odors (acetic acid, isovaleric acid) at a high level, and also had excellent durability in both deodorizing and antibacterial properties. On the other hand, Comparative Examples 1 to 5 were inferior in at least one of antibacterial and deodorizing properties, and did not have all the properties.

[0076] Examples 18 and 19: Deodorizing and antibacterial fiber structures (soaped 0 times) were obtained by changing the soaping with alkaline solution in Examples 14 and 15 to soaping with water. That is, the deodorizing and antibacterial fiber structures (soaped 0 times) of Examples 14 and 15 were immersed in water (room temperature) for 2 seconds, then pulled up while being squeezed through a squeeze roll so that the treatment solution accounted for 100% of the fiber structure material, and then heat-treated at 130°C for 1 minute while moving them through a pin tenter (PT-2A, manufactured by Tsujii Senki Co., Ltd.), to obtain the deodorizing and antibacterial fiber structures (soaped 0 times) of Examples 18 and 19.

[0077]

[0078] As a result, the deodorizing performance of both Examples 18 and 19 was evaluated as ◯ or ⊚. However, the deodorizing performance of both Examples 18 and 19 was evaluated as ◯ or ⊚. ２ In Example 19, the deodorizing effect of acetic acid was excellent, but the organic acid 2 g / m ２ In Example 18, the deodorizing effect of acetic acid was rated as ◯, while in Examples 14 and 15, in which soaping was performed with an alkaline solution, the deodorizing effect of acetic acid was rated as ⊚. This shows that while soaping with water can provide sufficient deodorizing effect, soaping with an alkaline solution is more preferable because it can further enhance the deodorizing effect.

[0079] Although the above examples show specific embodiments of the present invention, the examples are merely illustrative and should not be construed as limiting. Various modifications that are obvious to those skilled in the art are intended to fall within the scope of the present invention.

[0080] The deodorizing and antibacterial fiber structure of the present invention is highly safe, has excellent washing durability and sweat odor deodorizing properties, and has antibacterial properties, so it can be suitably used in clothing, bedding, and other items that come into direct contact with the skin.

[0081] REFERENCE SIGNS LIST 1 Treatment tank 2 Fiber structure 3 Squeeze roll 4 Heating device 5 Dryer 6 Treatment liquid

Claims

1. A method for producing a deodorizing and antibacterial fiber structure, which comprises contacting a fiber structure with a treatment liquid and then subjecting the fiber structure to a heat treatment at a temperature exceeding 100°C and not exceeding 200°C under normal or increased pressure for 0.5 minutes or more, wherein if the fiber structure comprises cotton fibers, the treatment liquid contains an organic acid and phosphinic acid, and if the fiber structure comprises synthetic fibers, the treatment liquid contains an organic acid and an acrylic resin and / or titanium oxide.

2. The method for producing a deodorizing and antibacterial fiber structure according to claim 1, wherein the organic acid contained in the treatment liquid is one or more selected from the group consisting of citric acid, malic acid, and tartaric acid.

3. The method for producing a deodorizing and antibacterial fiber structure according to claim 1 or 2, wherein the treatment liquid further contains titanium oxide when the treatment liquid contains an organic acid and a phosphinic acid.

4. A method for producing a deodorizing and antibacterial fiber structure according to any one of claims 1 to 3, wherein after the heat treatment, a soaping treatment is carried out with an alkaline solution and / or water.

5. A method for producing a deodorizing and antibacterial fiber structure described in any one of claims 1 to 4, wherein when the treatment liquid contains an organic acid and an acrylic resin, the mass ratio of the acrylic resin to the organic acid (acrylic resin / organic acid) is set to 0.1 to 5.

6. A method for producing a deodorizing and antibacterial fiber structure described in any one of claims 1 to 5, wherein when the treatment liquid contains an organic acid and a phosphinic acid, the mass ratio of the phosphinic acid to the organic acid (phosphinic acid / organic acid) is set to 0.05 to 10.

7. A method for producing a deodorizing and antibacterial fiber structure described in any one of claims 1 to 6, wherein when the treatment liquid contains an organic acid and titanium oxide, the mass ratio of the titanium oxide to the organic acid (titanium oxide / organic acid) is set to 0.1 to 5.

8. A textile structure having cotton fibers is coated with an organic acid at a concentration of 0.1 to 10 g / m ２ and phosphinic acid is 0.05 to 10 g / m ２ A deodorizing and antibacterial fiber structure having a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103).

9. The fiber structure contains 0.1 to 10 g / m of organic acid. ２ and acrylic resin is 0.05 to 5 g / m ２ A deodorizing and antibacterial fiber structure having a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103).

10. The fiber structure contains 0.1 to 10 g / m of organic acid. ２ and titanium oxide is 0.1 to 10 g / m ２ A deodorizing and antibacterial fiber structure having a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103).

11. A deodorizing and antibacterial fiber structure containing cotton fibers, obtained by contacting the fiber structure with a treatment liquid containing an organic acid and phosphinic acid and then subjecting the fiber structure to a heat treatment at a temperature of more than 100°C and not exceeding 200°C for 0.5 minutes or more under normal or increased pressure, wherein the deodorizing and antibacterial fiber structure has a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103).

12. A deodorizing and antibacterial fiber structure containing synthetic fibers, obtained by contacting the fiber structure with a treatment liquid containing an organic acid and an acrylic resin and / or titanium oxide, and then subjecting the fiber structure to a heat treatment at a temperature of more than 100°C and not exceeding 200°C for 0.5 minutes or more under normal or increased pressure, wherein the deodorizing and antibacterial fiber structure has a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C (in accordance with JIS L 0217-103).

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