Method for producing deodorant / antibacterial fiber structure, and deodorant / antibacterial fiber structure

Abstract

To provide a deodorant / antibacterial fiber structure which can sufficiently deodorize sweat smell, has high washing durability and safety, and gives a good image to a consumer, and a method for producing the same.SOLUTION: A production method performs heating treatment at higher than 100°C and 200°C or lower under normal pressure or pressurization for 0.5 minute or more, in a state in which treatment liquid 6 is brought into contact with a fiber structure 2, wherein when the treatment liquid 6 has an organic acid and a phosphinic acid, the fiber structure 2 has a cotton fiber, and when the treatment liquid 6 has an organic acid and an acrylic resin and / or titanium oxide, the fiber structure 2 has a synthetic fiber.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[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 sweat odor elimination, and antibacterial properties. [Background technology]

[0002] Conventionally, textile deodorizing agents that fix organic acids, titanium oxides, and alumina silicates, which are believed to have deodorizing effects, to fibers with binder resins 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 do not have sufficient washing durability, and there is a problem in that the desired deodorizing properties cannot be obtained after repeated washing, for example, 10 or more times. Furthermore, since titanium oxide and alumina silicate are insoluble substances, if they are blended in large amounts in order to improve washing durability, there is a risk that they will cause whitening and white spots on the fibers. On the other hand, water-soluble substances such as organic acids do not cause whitening or white spots on fibers even when incorporated in large amounts, but because they are water-soluble substances, it is difficult to improve washing durability by simply incorporating them. Furthermore, Patent Document 2 shows that metal complexes can be formed by using these organic acids in combination with sodium, silver, copper, and zinc, which can form complexes with these organic acids, but the deodorizing effect of these metal complexes is weak, and even metal complexes of acetic acid, which has the greatest deodorizing effect, have a weaker deodorizing effect 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 and a deodorizing component that addresses acidic odors are mixed, 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 a carboxyl group (citric acid, malic acid, tartaric acid) is introduced into natural or synthetic fibers without using a binder resin. However, in reality, these organic acids do not covalently bond to fibers, so it is thought that they do not exhibit sufficient washing durability. Moreover, carboxylic groups (citric acid, malic acid, tartaric acid) alone cannot deodorize the acidic odors of acetic acid and isovaleric acid. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. H04-163372 [Patent Document 2] Japanese Patent Application Laid-Open No. H10-292263 [Patent Document 3] Japanese Patent Application Laid-Open No. 2013-067918 Summary of the Invention [Problem to be solved by the invention]

[0007] Under these circumstances, the present invention aims to provide 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 manufacturing the same. [Means for solving the problem]

[0008] However, in light of these circumstances, the inventors have conducted extensive research and discovered 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, and thus completed the present invention.

[0009] That is, the present invention has the following aspects. [1] A method for producing a deodorizing and antibacterial fiber structure, in which a treatment liquid is brought into contact with the fiber structure and then subjected to a heat treatment at a temperature exceeding 100°C and not exceeding 200°C under normal pressure or pressure for 0.5 minutes or more, When the textile structure has cotton fibers, the treatment liquid contains an organic acid and a phosphinic acid, When the fiber structure has synthetic fibers, the treatment liquid contains an organic acid and an acrylic resin and / or titanium oxide, in accordance with the method for producing a deodorizing and antibacterial fiber structure. [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] The 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 a phosphinic acid. [4] A method for producing a deodorizing and antibacterial fiber structure according to any one of [1] to [3], which comprises carrying out a soaping treatment with an alkaline solution and / or water after the heat treatment. [5] A method for producing a deodorizing and antibacterial fiber structure described in 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 described in 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 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. [8] A textile structure containing cotton fibers is coated with an organic acid at a concentration of 0.1 to 10 g / m 2 and phosphinic acid 0.05 to 10 g / m 2 A fixed deodorizing and antibacterial fiber structure that 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 L0217-103). [9] The fiber structure contains 0.1 to 10 g / m of organic acid. 2 and acrylic resins are 0.05 to 5 g / m 2 A fixed deodorizing and antibacterial fiber structure that 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 L0217-103).

[10] The fiber structure contains 0.1 to 10 g / m of organic acid. 2 and titanium dioxide is 0.1 to 10 g / m 2 A fixed deodorizing and antibacterial fiber structure that 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 L0217-103).

[11] A deodorizing and antibacterial textile structure having cotton fibers, obtained by contacting a textile structure with a treatment liquid containing an organic acid and phosphinic acid and then subjecting the textile 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 textile 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 L0217-103).

[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 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 L0217-103). [Effects of the Invention]

[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 at a temperature exceeding 100°C and not exceeding 200°C under normal or increased pressure for 0.5 minutes or more, the treatment liquid contains an organic acid and a 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, 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, making it easy for consumers to accept the product. [Brief explanation of the drawings]

[0011] [Figure 1] 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. DETAILED DESCRIPTION OF THE 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] In this specification, "x and / or y (x and y are optional configurations)" means at least one of x and y, and can mean three possibilities: x only, y only, or x and y. In this specification, when the expression "X to Y" (X and Y are any numbers) is used, unless otherwise specified, it means "X or more and Y or less," as well as "preferably larger than X" or "preferably smaller than Y." In this specification, when it is expressed as "X or more" (X is any number) or "Y or less" (Y is any number), it also means that "it is preferably greater than X" or "it is preferably less than Y." In the present specification, when numerical ranges are described in stages, the upper or lower limit of a certain numerical range can be arbitrarily combined with the upper or lower limit of another numerical range. In addition, in the numerical ranges described in this specification, 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 textile structure to which deodorizing and antibacterial properties are to be imparted is the fiber itself or a product made from such a fiber. The textile structure prepared before imparting the deodorizing and antibacterial properties may be in the form of a final product as is, or the textile structure may be modified or combined with other components to change its shape or configuration to form a 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 can be used as raw materials for fiber structures include natural fibers such as cotton, linen, wool, and silk, 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 non-synthetic components (metals, inorganic substances, etc.), and blends of synthetic fibers with natural fibers such as cotton, acetate, rayon, wool, and silk. The method for producing the deodorizing and antibacterial fiber structure of this embodiment, and the deodorizing and antibacterial fiber structure will be described in detail below.

[0017] <<First embodiment>> The first embodiment of the method for producing a deodorizing and antibacterial fiber structure is a method for producing a deodorizing and antibacterial fiber structure by bringing a treatment liquid into contact with a fiber structure and 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] (fiber structures) The fiber structure used in the first embodiment has cotton as the fiber raw material, but it may have only cotton or may contain other fibers (blended fabric). Even when other fibers are contained, from the viewpoint of deodorizing acidic odors, it is preferable that the fiber structure contain 30% by mass or more of cotton, 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. For example, the fiber structure may contain 10 g / m of organic acid. 2 When fixing, the fiber structure has a basis weight of 1014 g / m 2 For example, if cotton canvas No. 1 (old JIS L3102) is used, it can be fixed by applying 200% by mass of a treatment liquid containing 0.5% by mass of organic acid (200% squeeze). 1014g / m 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 adhesion (squeezing rate) according to the properties of the fiber structure itself (for example, fiber density). For example, a basis weight of 72 g / m 2 In the case of polyester taffeta, by applying 50% by mass of a treatment liquid containing 28% by mass of organic acid (50% squeeze), the fiber structure was treated with 10 g / m of organic acid. 2 However, 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% squeezing), the organic acid content of 0.36 g / m 2 It may also be fixed.

[0022] That is, although the basis weight varies depending on the fiber structure, the deodorizing performance is determined by the fixed mass of the deodorizing component per unit area, regardless of the basis weight of the fiber structure. Furthermore, when the density of a 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 acrylic resins and titanium oxide. The inclusion of acrylic resins 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 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] (Contacting Method and Heat Treatment) The method for bringing the treatment liquid into contact 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 can be used in which the fiber structure 2 is immersed in a treatment liquid 6 and then heat-treated in this state at a predetermined temperature and under a predetermined pressure. That is, water is poured into a treatment tank 1 in which the target fiber structure 2 is immersed, and then a processing preparation liquid (first liquid or second liquid) is poured into this water to prepare a predetermined treatment liquid 6. The fiber structure 2 is immersed in the treatment liquid 6 in the treatment tank 1 , and then passed through squeeze rolls 3 to be pulled up while being lightly squeezed, and then introduced into a heating device 4 . The fiber structure 2 to which a predetermined amount of the treatment liquid 6 has been attached is moved within the heating device 4, and subjected to a heat treatment (so-called "pad dry processing") at a predetermined temperature (more than 100°C and less than 200°C) for a predetermined time (0.5 minutes or more), and if necessary, dried by passing through a dryer 5.

[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 pressure, and the heat treatment temperature is higher than 100°C and not higher 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 will not be heated sufficiently, and the components will tend to be insufficiently fixed. Conversely, if the heat treatment temperature is more than 200°C, the fiber structure will tend to be damaged. The heat treatment is carried out for 0.5 minutes or more, preferably for 0.5 to 10 minutes, and more preferably for 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 to promote the fixation of the deodorizing and antibacterial components. The pH of the alkaline solution is preferably 8 to 12, and 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. After the soaping treatment, the fiber structure is rinsed with water or the like as needed, and then dried to obtain the desired deodorizing and antibacterial fiber structure. The soaping treatment may be repeated, and it is more preferable to perform soaping with the alkaline solution and then soaping with water.

[0034] The deodorizing and antibacterial fiber structure thus obtained is a fiber structure containing cotton fibers, and the organic acid is added at a concentration of 0.1 to 10 g / m 2 In particular, from the viewpoint of deodorizing alkaline odors, 0.5 to 10 g / m 2 It is preferable that the amount of the adhesive is fixed, and more preferably, it is 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 preferably 0.5 to 4 g / m 2 , and 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, 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 with a deodorizing rate of 70% or more for ammonia, acetic acid, and isovaleric acid after 10 home washes at 40°C, and antibacterial properties with an antibacterial activity value of 2.0 or more according to JIS L1902:2015.

[0038] The deodorizing properties are thought to be due to the fact that a composite coating 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 coating has the property of adsorbing both alkaline and acidic odors. Furthermore, because this composite coating is firmly fixed to the fiber structure, there is almost no decrease in deodorizing properties even after 10 home washes at 40°C, and it is believed 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] The antibacterial properties are presumably 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 the washing method specified in 103 of Appendix 1 of JIS L0217 "Symbols and methods of labeling for handling textile products" (1995). That is, a household electric washing machine is filled with water at 40±2°C so that the bath ratio is 1:30, alkaline synthetic detergent is added and dissolved, and the laundry is washed for 5 minutes on strong conditions, then drained and spun, rinsed and spun for 2 minutes, and then rinsed and spun again for 2 minutes. This process is counted as one cycle. After 10 washes means after repeating this process 10 times. In this embodiment, the fiber structure after the final dehydration step is hung up and dried to form a deodorizing and antibacterial fiber structure.

[0041] (Deodorizing) In the present embodiment, the evaluation of deodorizing properties is carried out in accordance with the performance test method for deodorizing textile products (ISO 17299-3 gas chromatography method) as follows. That is, the fiber structure to be measured is 50 cm 2The sample pieces were cut into pieces of paper to prepare sample pieces, and 5 μL of odor components adjusted for each odor were injected into a 500 mL Erlenmeyer flask containing the sample pieces. 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 pieces, 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 higher the deodorizing rate (%), the better the deodorizing properties. Deodorization rate (%) = (1 - (sample concentration) / (blank test concentration)) x 100

[0042] (Antibacterial) In the present embodiment, the antibacterial properties are evaluated by the following method in accordance with JIS L1902. Specifically, Staphylococcus aureus or Klebsiella pneumoniae was inoculated onto a standard piece (cotton fabric that does not exhibit antibacterial activity) and onto sample pieces obtained by cutting the target textile structure, and the viable cell count on each piece was measured after 18 to 24 hours of incubation at 37°C. The antibacterial activity value was calculated from the obtained viable cell counts using the following formula.

[0043] Antibacterial activity value = (LogCt-LogCo)-(LogTt-LogTo) Standard growth value = (LogCt-LogCo) LogCo: Common logarithm of the arithmetic mean of the number of viable bacteria immediately after inoculation of the test bacteria on the standard specimen LogCt: Common logarithm of the arithmetic mean of the viable cell count after 18 hours of incubation of the standard specimen LogTo: Common logarithm of the arithmetic mean of the viable cell count immediately after inoculation of the test bacteria on the sample piece LogTt: Common logarithm of the arithmetic mean of the number of viable bacteria on the sample piece after 18 hours of incubation

[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, bedding, gloves, hats, futon covers, curtains, tents, and other items that come into direct contact with the skin and are prone to absorbing sweat.

[0045] <<Second embodiment>> The 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 structures) 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 fiber content in the fiber structure is preferably 50% by mass or more, more preferably 60% by mass or more, and even more preferably 70% by 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, 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] As the organic acid, the same ones as those used in the first embodiment can be used, and the preferred ones and more preferred ones are also the same as those given in the first embodiment. Furthermore, as described in the first embodiment, 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, and the calculation method is the same.

[0049] The acrylic resin may be a general acrylic binder that is used as an adhesive or fixing agent for clothing, textiles, etc. Among them, those having a glass transition temperature (TG) of −50° C. or higher and lower than 70° C. are preferred because they provide an excellent texture. The acrylic resin preferably does not have silica or the like bonded to the end of the resin. That is, when silica or the like is bonded to the end of the resin, the function of the end group that contributes to deodorizing properties tends to be inhibited. Furthermore, the acrylic resin preferably has a solid content of 10 to 80% by mass, and from the viewpoints of viscosity and cost, it is particularly preferable to use one having a solid content of 20 to 70% by mass.

[0050] The titanium oxide may have an average particle size of 0.001 to 10 μm, and from the viewpoint of dispersibility, the average particle size of 0.001 to 1 μm is preferably used. 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, 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.

[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 has an organic acid content 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 amount of the adhesive is fixed, and more preferably, it is 0.5 to 6 g / m 2 , and more preferably 1 to 4 g / m 2 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 effect against isovaleric acid, 0.1 to 5 g / m 2 It is preferable that the amount of the cellulose acetate solution is fixed at 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. [Example]

[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. The components contained in this treatment liquid are as follows: Organic acids (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) Thickener (special grade hydroxyethyl cellulose, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) Urethane resin (Bondic 1640NE, Bondic Japan) Glyoxal resin (Riken Resin MS250, manufactured by Miki Riken Co., Ltd.)

[0060] <Fiber structures> Details of each target fiber structure are as follows: Cotton (1): 100% cotton, 96.5g / m 2 , cotton cloth, manufactured by Shikizome Co., Ltd. Cotton (2): 100% cotton, 1014g / m 2 , Cotton canvas No. 1, manufactured by Kobo Ichisha PET(1): 100% PET, basis weight 158g / m 2 , Polyester tropical, manufactured by Irozome Co., Ltd. PET(2): PET 100%, basis weight 72g / m 2 , polyester taffeta, manufactured by Shikizome Co., Ltd.

[0061] [Example 1] <0 washes> The treatment liquid shown in Table 1 was prepared, and a fiber structure 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 a squeezing roll so that the amount of treatment liquid was a predetermined amount relative to the amount of fiber structure material (squeezing rate), and was then 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 (washed 0 times). <No washing soaping> Next, the deodorizing and antibacterial fiber structure (washed 0 times) was immersed in an alkaline solution (1% aqueous sodium carbonate solution at 80°C) for 2 seconds, and then pulled up while being squeezed through a squeeze roll so that the treatment solution accounted for 100% of the fiber structure material.The structure was then immersed in water (at room temperature) for 2 seconds, and then pulled up while being squeezed through a squeeze roll so that the treatment solution accounted for 100% of the fiber structure material.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 (washed 0 times, soaped). <10 washes with soap> The deodorizing and antibacterial fiber structure (0 times soaping after 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 (10 times soaping after 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 properties> ◎ (Very good)...70% or more 〇 (Good): 50% or more but less than 70% × (bad)...less than 50%

[0065] <Antibacterial> 〇 (Good)...Antibacterial activity value of 2.0 or more × (bad)...Antibacterial activity value less than 2.0

[0066] [Table 1]

[0067] [Table 2]

[0068] [Table 3]

[0069] [Table 4]

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

[0071] [Table 5]

[0072] [Table 6]

[0073] [Table 7]

[0074] [Table 8]

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

[0076] [Examples 18 and 19] The soaping with alkaline solution in Examples 14 and 15 was changed to soaping with water to obtain a deodorizing and antibacterial fiber structure (soaped 0 times after washing). That is, the deodorizing and antibacterial fiber structures of Examples 14 and 15 (washed 0 times) were immersed in water (room temperature) for 2 seconds, then pulled up while being squeezed through a squeezing 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 of Examples 18 and 19 (washed 0 times, soaped).

[0077] [Table 9]

[0078] As a result, the deodorizing properties of both Examples 18 and 19 were evaluated as ◯ or ⊚. However, the fixed organic acid content is 0.5 g / m 2 In Example 19, the deodorizing effect of acetic acid was excellent, but the organic acid 2 g / m2 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. [Industrial Applicability]

[0079] The deodorizing and antibacterial fiber structure of the present invention is highly safe, has excellent washing durability and deodorizing properties against sweat odors, and has antibacterial properties, making it suitable for use in clothing, bedding, and other items that come into direct contact with the skin. [Explanation of symbols]

[0080] 1 Treatment tank 2. Fiber structures 3 Squeeze roll 4 Heating device 5 Dryer 6 Treatment liquid

Claims

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

2. 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 at least one selected from the group consisting of citric acid, malic acid, and tartaric acid.

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

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

5. 3. The method for producing a deodorizing and antibacterial fiber structure according to claim 1, 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. 3. The method for producing a deodorizing and antibacterial fiber structure according to claim 1, 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. 3. A method for producing a deodorizing and antibacterial fiber structure according to claim 1, 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. The fiber structure having cotton fibers is coated with an organic acid in an amount of 0.1 to 10 g / m 2 and phosphinic acid is 0.05 to 10 g / m 2 A fixed deodorizing and antibacterial fiber structure, A deodorizing and antibacterial fiber structure that 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 L0217-103).

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 fixed deodorizing and antibacterial fiber structure, A deodorizing and antibacterial fiber structure that 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 L0217-103).

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 fixed deodorizing and antibacterial fiber structure, A deodorizing and antibacterial fiber structure that 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 L0217-103).

11. A deodorizing and antibacterial textile structure having cotton fibers, obtained by contacting a textile structure with a treatment liquid containing an organic acid and a phosphinic acid, and then subjecting the textile 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, 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 L0217-103).

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 at a temperature higher than 100°C and not higher than 200°C under normal pressure or pressure for 0.5 minutes or more, 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 L0217-103).

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