Cationic dyeable polyester fiber structure, method for manufacturing the same, and medical uniform

Abstract

To provide a cation-dyeable polyester fiber structure, a production method of the same, and a uniform for medical use.SOLUTION: A cation-dyeable polyester fiber structure includes a cationic dye, a quinoline compound, and an ultraviolet absorber, where 0.03 mass% or more and 0.80 mass% or less of the quinoline compound is included to a mass of the cation-dyeable polyester fiber structure, a color difference ΔE between before and after irradiating the cation-dyeable polyester fiber structure with ultraviolet carbon arc lamplight is 2.0 or lower, and an antibacterial activity value A50 after 50 times of high temperature acceleration washing is larger than a standard cloth growth value F in an antibacterial evaluation method described in an SEK mark textile product certification standard.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a cationic dyeable polyester fiber structure excellent in light fastness and antibacterial property after washing, a method for producing the same, and a medical uniform.

Background Art

[0002] Fiber products for hospitals such as white coats worn by medical staff in medical facilities such as hospitals and clinics may be industrially washed repeatedly with hot water at about 60°C to 100°C in consideration of hygiene, so antibacterial properties that can withstand high-temperature washing are required. In addition, medical staff may wash fiber products for hospitals at home and dry them by airing in the sun. When fiber products for hospitals are dried by airing in the sun, the color tone of the fiber products may change due to the influence of ultraviolet rays in sunlight, so light fastness is also required for fiber products for hospitals.

[0003] Furthermore, in recent years, fiber products for hospitals have been increasingly colored in various colors, so in addition to antibacterial properties and light resistance, color development properties are also required. Polyester fibers are widely used for fiber products for hospitals because they are more excellent in durability of high-temperature washing than cotton, etc. However, polyester fibers dyed with disperse dyes generally used in polyester dyeing have low color development properties, that is, they are unclear, which has become a problem when coloring fiber products for hospitals in various colors. On the other hand, polyester fibers dyed with cationic dyes are superior in color development properties to polyester fiber products dyed with disperse dyes, so their application development to fiber products for hospitals, etc. that require high color development properties has been progressing.

[0004] As a method for imparting antibacterial properties to a fiber structure, for example, Patent Document 1 proposes to heat-treat zinc 2-pyridylthiol-1-oxide (hereinafter referred to as zinc pyrithione), which is a kind of pyridine-based antibacterial agent, at a specific temperature under normal pressure or pressure and impart it to the fiber structure. It is described that a fiber structure having excellent antibacterial properties in industrial washing durability at a temperature of 85°C can be obtained thereby.

[0005] Furthermore, Patent Document 2 proposes heat-treating oxolinic acid under pressure in a treatment bath at a specific temperature. It is stated that this can impart antibacterial properties. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2000-8275 [Patent Document 2] Japanese Patent Publication No. 2021-42498 [Overview of the project] [Problems that the invention aims to solve]

[0007] The method described in Patent Document 1 has high antibacterial properties and wash durability, but because it uses an antibacterial agent containing zinc ions, there is a problem in that the treatment of wastewater generated after the application of the antibacterial agent is difficult. In addition, zinc pyrithione may affect the dyeability, which is another problem.

[0008] The method described in Patent Document 2 uses oxolinic acid, an organic carboxylic acid compound, and therefore does not have the wastewater treatment problem described in Patent Document 1. However, our investigation has shown that, under certain conditions, it may not be possible to achieve both lightfastness and antibacterial properties after washing.

[0009] The present invention was made to solve the above problems, and aims to provide a cationic dyeable polyester fiber structure that exhibits excellent lightfastness and antibacterial properties after washing when using cationic dyeable polyester fibers and cationic dyes without using antibacterial agents containing zinc ions or the like. [Means for solving the problem]

[0010] As a result of diligent research, the inventors have found that, as described above, it is difficult to achieve both lightfastness and antibacterial properties after washing, particularly in systems using cationic dyeable polyester fibers and cationic dyes, and in systems using both dyes and antibacterial agents. For example, it was found that increasing the amount of antibacterial agent to impart antibacterial properties resulted in a significant decrease in lightfastness, and the material was prone to fading when exposed to ultraviolet light. Therefore, further investigation revealed that by attaching a specific amount of quinoline-based compound to the fiber substrate and using an ultraviolet absorber, a cationic dyeable polyester fiber structure with excellent lightfastness and antibacterial properties after 50 high-temperature accelerated washes can be obtained. Furthermore, it was found that in order to satisfy all of the above performance requirements, it is important to use a method of chemically treating the fiber substrate by adding the cationic dye, quinoline-based compound, and ultraviolet absorber in the same bath.

[0011] In other words, the present invention has the following configuration in order to solve the above problems. (1) A cationic dyeable polyester fiber structure comprising a cationic dye, a quinoline compound, and an ultraviolet absorber, The quinoline compound is contained in an amount of 0.03% by mass or more and 0.80% by mass or less relative to the mass of the cationic dyeable polyester fiber structure. The color difference ΔE before and after irradiating the cationic dyeable polyester fiber structure with ultraviolet carbon arc light is 2.0 or less. Furthermore, in the antibacterial evaluation method described in the SEK mark textile product certification standards, the antibacterial activity value after 50 high-temperature accelerated washes was A. 50 If it is greater than the standard distribution growth value F, Cationic dyeable polyester fiber structure. (2) The cationic dyeable polyester fiber structure according to (1), wherein the quinoline compound is at least one compound selected from the group consisting of oxolinic acid, ciprofloxacin, levofloxacin, moxifloxacin, difluoromethoxygalenoxacin, and sitafloxacin. (3) The cationic dyeable polyester fiber structure according to (1), wherein the quinoline compound is an oxolinic acid. (4) The cationic dyeable polyester fiber structure according to any one of (1) to (3), wherein the ultraviolet absorber is a benzotriazole compound. (5) The cationic dyeable polyester fiber structure according to (4), comprising 0.25% by mass or more and 2.00% by mass or less of the benzotriazole compound with respect to the mass of the cationic dyeable polyester fiber structure. (6) A medical uniform comprising a cationic dyeable polyester fiber structure as described in any of (1) to (5). (7) A treatment solution preparation step in which a treatment solution containing a cationic dye, a quinoline compound, and an ultraviolet absorber is prepared, A chemical treatment step involves immersing a fibrous substrate containing cationic dyeable polyester fibers in the aforementioned treatment solution and heating it in a bath at a temperature of 110°C to 140°C under pressure. A post-heat treatment process involves dry heat treatment at an ambient temperature of 150°C to 190°C, A method for producing a cationically dyeable polyester fiber structure containing, The cationic dye, the quinoline compound, and the ultraviolet absorber are included. The quinoline compound is contained in an amount of 0.03% by mass or more and 0.80% by mass or less relative to the mass of the cationic dyeable polyester fiber structure. The color difference ΔE before and after irradiating the cationic dyeable polyester fiber structure with ultraviolet carbon arc light is 2.0 or less. Furthermore, in the antibacterial evaluation method described in the SEK mark textile product certification standards, the antibacterial activity value after 50 high-temperature accelerated washes was A. 50 If it is greater than the standard distribution growth value F, A method for producing cationic dyeable polyester fiber structures. (8) The method for producing a cationic dyeable polyester fiber structure according to (7), wherein in the processing solution preparation step, a processing solution containing the quinoline compound in an amount of 0.003% by mass or more and 0.080% by mass or less relative to the mass of the processing solution is used. (9) A method for producing a cationic dyeable polyester fiber structure according to (7) or (8), wherein the ultraviolet absorber is a benzotriazole compound. (10) The method for producing a cationic dyeable polyester fiber structure according to (9), wherein in the processing solution preparation step, a processing solution containing the benzotriazole compound in an amount of 0.025% by mass or more and 0.200% by mass or less relative to the mass of the processing solution is used. [Effects of the Invention]

[0012] According to the present invention, when using cationic dyeable polyester fibers and cationic dyes, it is possible to provide cationic dyeable polyester fibers and a method for producing the same that exhibit excellent lightfastness and antibacterial properties after washing. Specifically, when the cationic dyeable polyester fiber structure is irradiated with ultraviolet carbon arc light as defined in JIS L 0842:2004 before washing, it is possible to provide cationic dyeable polyester fibers that exhibit lightfastness such that the color difference ΔE before and after irradiation is 2.0 or less, and antibacterial properties that meet the evaluation criteria for "antibacterial processing (specific use: red)" of the SEK mark textile product certification standard after 50 high-temperature accelerated washes.

[0013] Furthermore, by enabling the processing of dyes, quinoline compounds, and ultraviolet absorbers in the same bath, it is possible to provide a method for manufacturing cationic dyeable polyester fiber structures at low cost. [Modes for carrying out the invention]

[0014] [Cationically dyeable polyester fiber structure] The present invention will be described in detail below along with preferred embodiments, but is not limited to these embodiments. The cationic dyeable polyester fiber structure of the present invention comprises a cationic dye, a quinoline compound, and an ultraviolet absorber, wherein the quinoline compound is contained in an amount of 0.03% to 0.80% by mass relative to the mass of the cationic dyeable polyester fiber structure, the color difference ΔE before and after irradiation of the cationic dyeable polyester fiber structure with ultraviolet carbon arc light is 2.0 or less, and the antibacterial activity value A after 50 high-temperature accelerated washes in the antibacterial evaluation method described in the SEK mark textile product certification standards. 50 It has the characteristic of being greater than the standard distribution growth value F.

[0015] In this invention, "SEK Mark Textile Product Certification Standards" refers to the "SEK Mark Textile Product Certification Standards" (Document Management Number: JEC301) of the Japan Textile Evaluation Technology Council, revised on April 1, 2024.

[0016] <Textile base material> The fibrous base material constituting the cationic dyeable polyester fiber structure of the present invention can preferably be a fabric such as a woven fabric, knitted fabric, or nonwoven fabric. Furthermore, the fibrous base material may be in the form of a filament yarn or a spun yarn, and is not limited to these. Additionally, if necessary, synthetic fibers other than cationic dyeable polyester fibers, such as polyester, acrylic, and nylon, as well as natural fibers such as cotton, wool, and silk, and semi-synthetic fibers such as rayon and acetate, may be combined and used in forms such as interwoven fabrics, interknitted fabrics, blended fabrics, and blended fibers.

[0017] The proportion of cationic dyeable polyester fibers in the fiber base material according to the present invention is not limited, but a higher proportion improves the lightfastness and antibacterial properties after washing in the present invention. For this reason, the proportion of cationic dyeable polyester fibers is preferably 50% by mass or more, more preferably 60% by mass or more, and even more preferably 80% by mass or more, relative to the total mass of the fiber base material.

[0018] The cationic dyeable polyester fiber of the present invention is a fiber obtained by melt-spinning a resin made of cationic dyeable polyester. Here, cationic dyeable polyester is a copolymer polyester obtained by polymerizing an aromatic dicarboxylic acid containing terephthalic acid or its ester derivative and a sulfonic acid metal base as a carboxylic acid component together with an alkylene glycol component such as ethylene glycol or trimethylene glycol. In the present invention, known cationic dyeable polyester fibers can be used.

[0019] Furthermore, while there are no particular restrictions on the fineness of the cationic dyeable polyester fiber, it is preferable that the single fiber fineness be between 0.04 dtex and 5.00 dtex, as this allows the effects of the present invention to be significantly exhibited.

[0020] The cationic dyeable polyester fiber structure of the present invention may contain, in addition to the cationic dyes, quinoline compounds, and ultraviolet absorbers described later, other agents such as water absorbers and fluorescent whitening agents in any amount.

[0021] <Cationic dyes> The cationic dyeable polyester fiber structure of the present invention contains a cationic dye. The cationic dye referred to herein is a water-soluble dye used for dyeing synthetic fibers such as cationic dyeable polyester fibers and acrylic fibers. The dye is characterized by ionic bonding between the cationic substituent of the cationic dye and the anionic substituent, such as a sulfonic acid group, of the cationic dyeable polyester fiber.

[0022] Furthermore, the type of cationic dye used in this invention is not particularly limited, and known cationic dyes can be used. In addition, the amount of dye attached to the fiber substrate is not limited, and it is sufficient as long as the dye necessary to produce the desired hue is attached.

[0023] <Quinoline compounds> The cationic dyeable polyester fiber structure of the present invention contains a quinoline compound. Examples of quinoline compounds include oxolinic acid (5-ethyl-8-oxo-[1,3]dioxolo[4,5-g]quinoline-7-carboxylic acid), ciprofloxacin (1-cyclopropyl-1,4-dihydro-6-fluoro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid), levofloxacin ((3S)-9-fluoro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid), and moxifloxacin ((1S,6S)-1-cyclopropyl-7-(2,8-diazabicyclo[4.3.0]non-8-I). It is preferable that the compound is at least one compound selected from the group consisting of (1-(1R,2S)-2-fluorocyclopropyl)-6-fluoro-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, galenoxacin (1-cyclopropyl-8-(difluoromethoxy)-7-[(1R)-1-methyl-2,3-dihydro-1H-isoindole-5-yl]-4-oxo-1,4-dihydroquinoline-3-carboxylic acid), and sitafloxacin (7-[(7S)-7-amino-5-azapiro[2,4]heptan-5-yl]-8-chloro-6-fluoro-1-[(1R,2S)-2-fluorocyclopropyl]-4-oxo-1,4-dihydroquinoline-3-carboxylic acid). In the present invention, it is more preferable to use oxolinic acid.

[0024] The quinoline compounds listed above may also be alkali metal salts such as sodium or potassium salts, alkaline earth metal salts such as calcium or magnesium salts, or polyvalent metal salts such as aluminum or iron salts.

[0025] The mass of the quinoline compound contained in the cationic dyeable polyester fiber structure of the present invention is 0.03% by mass or more, preferably 0.15% by mass or more, relative to the fiber structure. The antibacterial effect of the present invention is obtained when the mass of the quinoline compound is 0.03% by mass or more. On the other hand, if the mass of the quinoline compound is high, while the antibacterial properties are good, the lightfastness tends to decrease. Furthermore, a large amount of white quinoline compound adheres to the surface of the cationic dyeable polyester fiber structure, which can cause the fiber structure to whiten and change its hue. Therefore, the mass of the quinoline compound contained in the cationic dyeable polyester fiber structure is 0.80% by mass or less, preferably 0.50% by mass or less, and more preferably 0.20% by mass or less, relative to the fiber structure. By containing the quinoline compound within the above range in the cationic dyeable polyester fiber structure, good antibacterial properties can be obtained even after 50 high-temperature accelerated washes. The mass of the quinoline compound contained in the cationic dyeable polyester fiber structure of the present invention is measured by the method described later.

[0026] <UV absorber> The cationic dyeable polyester fiber structure of the present invention contains an ultraviolet absorber. In the present invention, the ultraviolet absorber is a functional processing agent having an aromatic compound that converts absorbed ultraviolet light into thermal energy or light energy with a longer wavelength than ultraviolet light. By attaching the ultraviolet absorber to the cationic dyeable polyester fiber structure of the present invention, lightfastness is improved and fading can be suppressed. Examples of the ultraviolet absorber of the present invention include benzotriazole compounds, benzophenone compounds, or triazine compounds. Since benzotriazole compounds absorb ultraviolet light over a wide wavelength range, the ultraviolet absorber of the present invention is preferably a benzotriazole compound.

[0027] The benzotriazole compound of the present invention is represented by the following general formula (1).

[0028] [ka]

[0029] (In the above formula, R 1 R represents a hydrogen atom, halogen atom, or alkyl group. 2 and R 3 (Each represents a hydrogen atom or an alkyl or alkoxy group with 1 to 22 carbon atoms.) Preferred benzotriazole compounds include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-[2-hydroxy-3,5-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole, 2-(3,5-di-tert-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, and 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenylmethyl)-4-(1,1,3,3-tetramethylbutyl)phenol.

[0030] The cationic dyeable polyester fiber structure of the present invention preferably contains 0.25% by mass or more of a benzotriazole compound, and more preferably 0.50% by mass or more. The inclusion of 0.25% by mass or more of a benzotriazole compound in the cationic dyeable polyester fiber structure improves its lightfastness. On the other hand, it is preferable to contain 2.00% by mass or less of a benzotriazole compound, and more preferably 1.00% by mass or less. Even after 50 high-temperature accelerated washes, the cationic dyeable polyester fiber structure of the present invention exhibits good lightfastness when it contains 0.25% by mass or more and 2.00% by mass or less of a benzotriazole compound. The ratio of the mass of the ultraviolet absorber to the mass of the cationic dyeable polyester fiber structure of the present invention is measured by the method described later.

[0031] <Antibacterial properties of cation-dyeable polyester fiber structures> In the antibacterial evaluation method described in the SEK Mark fiber product certification standard determined by the Fiber Evaluation Technology Council, the cationic dyeable polyester fiber structure of the present invention has an antibacterial activity value A 50 greater than the standard cloth growth value F after 50 times of high-temperature accelerated washing. That is, it is possible to provide a cationic dyeable polyester fiber structure having antibacterial properties that meet the evaluation criteria of "bacteriostatic processing (specific use: red)" in the SEK Mark fiber product certification standard after 50 times of high-temperature accelerated washing. Note that high-temperature accelerated washing and antibacterial tests are evaluated by the methods described later.

[0032] <Light fastness of cationic dyeable polyester fiber structure> In addition, for the cationic dyeable polyester fiber structure of the present invention, the color difference ΔE before and after irradiating the cationic dyeable polyester fiber structure with ultraviolet carbon arc lamp light is 2.0 or less. Here, "irradiating the cationic dyeable polyester fiber structure with ultraviolet carbon arc lamp light" means irradiating the ultraviolet carbon arc lamp light by the third exposure method until the exposed part fades to the standard with a method conforming to JIS L 0842:2004. And the "color difference ΔE" refers to L representing lightness, * a representing chroma, * and b * A value represented by a total of three variables of L * a * b <00\00013>is the distance between two points on the color space. The smaller the color difference ΔE, the smaller the color change due to light irradiation, that is, the higher the light fastness. Note that as an index of light fastness, there is a blue scale which is a standard object for confirming standard fading. In the case of clothing applications, the blue scale grade 4 is often used as a standard, and this blue scale grade 4 corresponds to approximately 2.0 in terms of the color difference ΔE.

[0033] ]END]]〔Use〕 The cationic dyeable polyester fiber structure of the present invention can be applied to various applications that require high light fastness and antibacterial properties. For example, it can be used as a fabric for clothing, bedding, towels, carpets, curtains, sheets, etc.

[0034] As for clothing, it can be used in general clothing, uniforms, formal and business attire, work clothes, sportswear, and medical uniforms such as white coats, scrubs, scrubs, doctor's coats, nurse uniforms, and tunics worn by medical professionals. The cationic dyeable polyester fiber structure of the present invention is particularly preferable to be included in medical uniforms.

[0035] [Method for manufacturing cationic dyeable polyester fiber structures] The present invention provides a method for producing a cationic dyeable polyester fiber structure, comprising: a treatment solution preparation step of preparing a treatment solution containing a cationic dye, a quinoline compound, and an ultraviolet absorber; a chemical treatment step of immersing a fiber substrate containing cationic dyeable polyester fibers in the treatment solution and heat-treating it in a bath at a temperature of 110°C to 140°C under pressure; and a post-heat treatment step of performing dry heat treatment at an ambient temperature of 150°C to 190°C, wherein the cationic dye, the quinoline compound, and the ultraviolet absorber are present, and the quinoline compound is present in an amount of 0.03% to 0.80% by mass relative to the mass of the cationic dyeable polyester fiber structure, the color difference ΔE before and after irradiation of the cationic dyeable polyester fiber structure with ultraviolet carbon arc light is 2.0 or less, and the antibacterial activity value A after 50 high-temperature accelerated washes in the antibacterial evaluation method described in the SEK mark textile product certification standards. 50 The present invention is characterized by a cationic dyeable polyester fiber structure in which the standard fabric growth value F is greater than that of the standard fabric growth value F.

[0036] <Processing solution preparation process> In the treatment solution preparation step, a treatment solution containing a cationic dye, a quinoline compound, and an ultraviolet absorber is prepared. For example, the treatment solution can be prepared by adding the cationic dye, quinoline compound, and ultraviolet absorber in any order at room temperature.

[0037] Furthermore, cationic dyes can be used in any amount to match the hue of the textile product being manufactured.

[0038] Furthermore, the treatment solution used contains a quinoline compound in an amount of preferably 0.003% to 0.080% by mass, more preferably 0.006% to 0.045% by mass, and even more preferably 0.009% to 0.020% by mass, relative to the mass of the treatment solution. By adjusting the solution to the above range, the amount of quinoline compound adhering to the cationic dyeable polyester fiber structure becomes 0.03% to 0.80% by mass relative to the mass of the cationic dyeable polyester fiber structure.

[0039] Furthermore, the ultraviolet absorber is preferably a benzotriazole compound, in which case, preferably a treatment solution containing a benzotriazole compound in an amount of 0.025% to 0.200% by mass, more preferably 0.050% to 0.100% by mass, relative to the mass of the treatment solution is used. By adjusting to the above range, the amount of benzotriazole compound adhering to the cationic dyeable polyester fiber structure becomes 0.25% to 2.00% by mass, relative to the mass of the cationic dyeable polyester fiber structure.

[0040] <Chemical treatment process> In the chemical treatment process, a bath processing method is employed. This bath processing method involves immersing a cationic dyeable polyester fiber substrate in a bath containing the treatment solution and then heating it to adhere the treatment solution to the substrate.

[0041] In this process, first, the cation-dyeable polyester fiber substrate is added to the treatment solution prepared in the treatment solution preparation step under a bath ratio (mass of cation-dyeable polyester fiber substrate:mass of treatment solution) of 1:5 to 1:30. Subsequently, a heat treatment is performed in a sealed container under pressure in a bath at a temperature of 110°C to 140°C.

[0042] In the present invention, the chemical treatment process is completed in a single treatment bath, thus reducing the number of steps compared to cases where the cationic dye, quinoline compound, and UV absorber application processes are carried out in separate baths. As a result, productivity can be improved, and the cationic dyeable polyester fiber structure of the present invention can be manufactured at a low cost.

[0043] Furthermore, if at least one of a quinoline compound or an ultraviolet absorber is treated with a chemical solution using the pad processing method, the lightfastness and / or antibacterial performance after washing as described in the present invention will not be exhibited. The pad processing method referred to herein is a method in which a cationic dyeable polyester fiber base material is immersed in a treatment solution, pressed with a mangle roller or the like so that a certain amount of treatment solution adheres to it, and then subjected to dry heat treatment in a dryer or moist heat treatment under saturated steam at 100°C to adhere the treatment solution to the cationic dyeable polyester fiber base material.

[0044] <Post-treatment process> In the post-heat treatment step, the cation-dyeable polyester fiber substrate, which has been treated with moist heat in the chemical treatment step, is set in a pin tenter and subjected to dry heat treatment for 15 seconds to 5 minutes at an ambient temperature of 150°C to 190°C.

[0045] <Post-processing process> Although the cation-dyeable polyester fiber structure according to the present invention is obtained through the aforementioned post-heat treatment process, the method for manufacturing the cation-dyeable polyester fiber structure according to the present invention also allows for various further finishing processes, similar to those for general cation-dyeable polyester fiber structures. For example, calendering, which improves the light reflection of the surface of the cation-dyeable polyester fiber structure and gives it a glossy appearance by compressing and smoothing it using rollers, and napping, which creates a fluffy surface and provides heat retention and flexibility by scratching or abrading the surface of the cation-dyeable polyester fiber structure using needles or abrasive cloths. Of course, in the present invention, the cation-dyeable polyester fiber structure obtained by performing these finishing processes is also considered to be the cation-dyeable polyester fiber structure of the present invention. [Examples]

[0046] Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The washing methods and various test methods in the examples were carried out according to the following methods.

[0047] (Washing method) The process followed the "Washing Method for SEK Mark Textile Products," which is the certification standard of the Japan Textile Evaluation Technology Council. Specifically, a washer washing machine was used, and 120 mL of "JAFET Standard Blended Detergent" was added to 90 L of water to create the washing solution. Subsequently, the cationic dyeable polyester fiber structure and, if necessary, load fabric were added to this washing solution so that the bath ratio (mass of cationic dyeable polyester fiber structure:mass of washing solution) was 1:30, and the total mass of the cationic dyeable polyester fiber structure and load fabric was adjusted to 3 kg. After that, 1) Wash at 80°C for 120 minutes. 2) Drainage The following was done, and rinsing was performed using a household washing machine with a centrifugal wringing device, standard washing capacity, and standard water volume, conforming to the JIS C 9606:2007 (electric washing machine) standard, as specified in "Appendix 1 Test Methods by Symbol - Washing Method (Water Washing), No. 103" of JIS L 0217:1995 "Symbols and Methods of Displaying for Handling Textile Products". That is, 3) Thoroughly dehydrate the cationic dyeable polyester fiber structure and load fabric for 3 to 5 minutes. 4) 15-minute overflow rinse (aim for 3-5 replacement water volumes) 5) Dehydrate using the same method as in 4). This was done. Then, steps 3) to 5) were repeated a total of four times, and then steps 1) to 5) were repeated a total of five times using a washer washing machine and a household washing machine. Finally, only the cationic dyeable polyester fiber structure was removed. 6) Use a household washing machine and perform a 5-minute overflow rinse (aim for 3-5 water replacement cycles). 7) Dehydrate using the same method as in 3). 8) Drying at a temperature of 80°C or lower. The following was done. Regarding step 8), the products were dried by hanging or laying them flat in a place where they were not exposed to direct sunlight.

[0048] (Antibacterial test) 1) Test method: The test was conducted using the bacterial solution absorption method based on JIS L 1902:2015 "Test method and antibacterial effect of textile products". The test was also conducted under the condition that 0.05% by mass of the nonionic surfactant "Tween" (registered trademark) 80 was added to the test bacterial suspension relative to the mass of the cationic dyeable polyester fiber structure. 2) Test strain: Staphylococcus aureus 3) Evaluation Method: The evaluation criteria for antibacterial processing (specific use: red) in "18.3 Evaluation Criteria for Bacterial Solution Absorption Method" of the "SEK Mark Textile Product Certification Standards" mentioned above were followed. Specifically, the antibacterial activity value of the cation-dyeable polyester fiber structure after antibacterial processing, after 50 washes, was set to A. 50 If the growth value of an unwashed standard cloth is F, then A 50 >When F is true, that is, A 50 -If F>0, then antibacterial properties are good, A 50 If -F ≤ 0, it was determined to be poor antibacterial. The standard fabric refers to the JIS L 0803 attached white cloth (cotton No. 3-1) that has been treated with water washing, as specified in the proviso of "3.1 Target specimen (control specimen)" in JIS L 1902:2015 "Test method and antibacterial effect of textile products," which is sold by the Japan Textile Evaluation Technology Council as a standard fabric (cotton) for antibacterial testing.

[0049] Here, the antibacterial activity value A after n washes. n The growth value F for the standard fabric was calculated using the following formulas (2) and (3). A n =(log C t -log C o )-(log T t -log T o ) …(2) F = log C t -log C o …(3) log Co : The common logarithm of the arithmetic mean of the number of viable bacteria in three samples of standard cloth immediately after inoculation with the test bacteria. log C t : Common logarithm of the arithmetic mean of viable bacterial counts in three samples after 18 hours of incubation on a standard cloth. log T o : The common logarithm of the arithmetic mean of the number of viable bacteria in three samples immediately after inoculation of test bacteria in the fiber structure of the present invention. log T t : The common logarithm of the arithmetic mean of the number of viable bacteria in three samples after 18 hours of incubation in the fibrous structure of the present invention. Furthermore, the antibacterial activity value A0 of the cation-dyeable polyester fiber structure after antibacterial treatment, before washing, was also evaluated using the method described above.

[0050] (Lightfastness test) 1) Light irradiation conditions: Cationic dyeable polyester fiber structures treated with antibacterial processing were irradiated with ultraviolet carbon arc light until the exposed area reached standard fading, according to the third exposure method of the "Test method for color fastness to ultraviolet carbon arc light" specified in JIS L 0842:2004. 2) Measurement of the color difference ΔE before and after irradiation of a cationic dyeable polyester fiber structure with ultraviolet carbon arc light: Using a spectrophotometer Model CM-3700d (manufactured by Konica Minolta, Inc.), the diffuse reflectance of the cationic dyeable polyester fiber structure was measured before and after irradiation with ultraviolet carbon arc light at a light source of D65 and a 10-degree field of view, and the brightness difference ΔL was calculated. * a * The difference is Δa * , b * The difference is Δb * The color difference ΔE was calculated using the following formula (4). ΔE={(ΔL * ) 2 +(Δa * ) 2 +(Δb * ) 2} 1 / 2 …(4) Here, the brightness difference ΔL * , and Δa * ·Δb *This is according to JIS Z8781-4:2013 "Colorimetry - Part IV: CIE 1976 L * a * b * "Color space" "3.7 CIELAB1976 ab lightness difference, ΔL * " and "3.8 CIELAB1976 a * , b * Difference, Δa * Δb * This is the value defined by "[ ]".

[0051] Furthermore, lightfastness tests were also conducted on cationic dyeable polyester fiber structures after washing using the same method. In addition, in Table 1 described later, the color difference ΔE before and after irradiation of the cationic dyeable polyester fiber structure with ultraviolet carbon arc light is simply referred to as "color difference ΔE".

[0052] (Ratio of the mass of quinoline compounds to the mass of cationic dyeable polyester fiber structures) 1.00 g of antibacterial treated cationic dyeable polyester fiber structure was weighed out and immersed in a solution of methanol and sodium hydroxide aqueous solution to dissolve the cationic dyeable polyester fiber structure. The solution was then filtered. Next, the mass of quinoline compounds attached to the cationic dyeable polyester fiber structure was measured by high-performance liquid chromatography. Finally, the ratio (mass%) of the mass of the quinoline compounds to the accurately weighed mass of the cationic dyeable polyester fiber structure was calculated.

[0053] In addition, in the column for cationic dyeable polyester fiber structures in Table 1, the "ratio of the mass of quinoline compounds to the mass of cationic dyeable polyester fiber structures" is denoted as "quinoline compounds."

[0054] (Ratio of the mass of the UV absorber to the mass of the cationic dyeable polyester fiber structure) 300 g of cationic dyeable polyester fiber substrate was dried at 100°C for 60 minutes before the chemical treatment process. Then, the cationic dyeable polyester fiber substrate was placed in a desiccator containing silica gel as a desiccant for 20 minutes to dissipate heat. Immediately thereafter, the mass of the cationic dyeable polyester fiber substrate was measured using a precision balance. The mass of the cationic dyeable polyester fiber structure after the post-heat treatment process was measured in the same manner as in the examples, and the ratio of the mass of the ultraviolet absorber to the cationic dyeable polyester fiber structure (mass%) was measured using the following formula (5). Percentage of UV absorber by mass (mass%) = {(Amount of cationic dyeable polyester fiber structure material after post-heat treatment - Amount of quinoline compound attached - Mass of untreated cationic dyeable polyester fiber base material) / Amount of cationic dyeable polyester fiber structure material after post-heat treatment} × 100 …(5) In addition, in the column for cationic dyeable polyester fiber structures in Table 1, the "ratio of the mass of the ultraviolet absorber to the mass of the cationic dyeable polyester fiber structure" is denoted as "ultraviolet absorber".

[0055] [Example 1] (1) Preparation of cationic dyeable polyester fiber base material A cationic dyeable polyester fiber base material was prepared by heat-setting a fabric using a woven material with cation-dyeable polyester fibers as warp and weft threads. The fabric consisted of cation-dyeable polyester fibers made of copolymerized polyethylene terephthalate copolymerized with 1.7 mol% 5-sodium sulfoisophthalic acid, with 167 dtex-72 filaments (single fiber fineness 2.32 dtex) as the warp and weft threads, and then heat-setting the fabric at 175°C for 0.5 minutes using dry heat.

[0056] (2) Preparation of processing solution A treatment solution consisting of a cationic dye, a quinoline compound, an ultraviolet absorber, and a dyeing acid was prepared. The following chemicals were used, and the mass ratio of each chemical to the mass of the treatment solution was adjusted as follows. • Cationic dye: Kayacryl Blue BG-ED (manufactured by Nippon Kayaku Co., Ltd.), 0.200% by mass • Quinoline compound: Oxolinic acid, 0.003% by mass • UV absorber: 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 0.025% by mass • Staining acid: Mixed aqueous solution of 70% by mass acetic acid / 30% by mass sodium acetate, 0.005% by mass In addition, in the "Manufacturing Method" column of Table 1, "the ratio of the mass of the quinoline compound to the mass of the treatment solution" is written as "quinoline compound," and "the ratio of the mass of the ultraviolet absorber to the mass of the treatment solution" is written as "ultraviolet absorber."

[0057] (3) Chemical treatment process The cationic dyeable polyester fiber substrate was immersed in the treatment solution prepared above and subjected to chemical treatment under pressure at 120°C for 30 minutes in a bath processing machine. Afterward, the cationic dyeable polyester fiber substrate was removed from the bath processing machine and washed and dewatered. The bath processing machine used was the following apparatus, and the bath ratio was as follows. Bath processing machine: 12-color rotary pot dyeing test machine (MINI-COLOUR 12EL model: manufactured by Texam Giken Co., Ltd.) Bath ratio (mass of cationic dyeable polyester fiber substrate:mass of treatment solution): 1:10 (4) Post-heat treatment process A cation-dyeable polyester fiber substrate treated with a chemical solution was set in a pin tenter, and a dry heat setting was performed at 170°C for 1 minute to obtain a cation-dyeable polyester fiber structure. The results are shown in Table 1.

[0058] The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.62 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A 50 -F) was 1.7, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.71, and the index of antibacterial activity value before washing (A0-F) was 1.4, indicating good lightfastness after washing and good antibacterial properties before washing.

[0059] [Example 2] In Example 1, the procedure was carried out in the same manner as in Example 1, except that 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was added at 0.100% by mass. The results are shown in Table 1. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 1.52 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 The -F value was 1.4, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.65, and the index of antibacterial activity value before washing (A0-F) was 1.7, indicating good lightfastness after washing and good antibacterial properties before washing.

[0060] [Example 3] In Example 2, the procedure was carried out in the same manner as in Example 2, except that 0.006% by mass of oxolinic acid was used. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.62 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A 50 The -F value was 2.2, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.69, and the index of antibacterial activity value before washing (A0-F) was 2.1, indicating good lightfastness after washing and good antibacterial properties before washing.

[0061] [Example 4] In Example 2, the procedure was carried out in the same manner as in Example 2, except that 0.009% by mass of oxolinic acid was used. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.75 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A 50 The -F) value was 2.9, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.70, and the index of antibacterial activity value before washing (A0-F) was 3.3, indicating good lightfastness after washing and good antibacterial properties before washing.

[0062] [Example 5] In Example 2, the procedure was carried out in the same manner as in Example 2, except that 0.012% by mass of oxolinic acid was used. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.83 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 The -F value was 2.6, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.89, and the index of antibacterial activity value before washing (A0-F) was 2.8, indicating good lightfastness after washing and good antibacterial properties before washing.

[0063] [Example 6] In Example 2, the procedure was carried out in the same manner as in Example 2, except that 0.015% by mass of oxolinic acid was used. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.91 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 The -F value was 3.0, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.75, and the index of antibacterial activity value before washing (A0-F) was 3.1, indicating good lightfastness after washing and good antibacterial properties before washing.

[0064] [Example 7] In Example 6, the procedure was carried out in the same manner as in Example 6, except that 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was added at 0.200% by mass. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 1.86 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 The -F value was 2.6, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.80, and the index of antibacterial activity value before washing (A0-F) was 2.5, indicating good lightfastness after washing and good antibacterial properties before washing.

[0065] [Example 8] In Example 1, the procedure was carried out in the same manner as in Example 1, except that 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was added at 0.150% by mass. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 1.50 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 The -F) value was 0.8, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.55, and the index of antibacterial activity value before washing (A0-F) was 1.4, indicating good lightfastness after washing and good antibacterial properties before washing.

[0066] [Example 9] In Example 1, the procedure was carried out in the same manner as in Example 1, except that 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was added at 0.200% by mass. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 1.48 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 The -F value was 0.1, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.54, and the index of antibacterial activity value before washing (A0-F) was 0.6, indicating good lightfastness after washing and good antibacterial properties before washing.

[0067] [Example 10] In Example 6, the procedure was carried out in the same manner as in Example 6, except that 0.050% by mass of 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was used. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 1.92 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 The -F) value was 3.4, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.80, and the index of antibacterial activity value before washing (A0-F) was 3.2, indicating good lightfastness after washing and good antibacterial properties before washing.

[0068] [Example 11] In Example 6, the procedure was carried out in the same manner as in Example 6, except that 0.025% by mass of 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was used. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 1.98 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50 -F) was 3.3, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 1.85, and the index of antibacterial activity value before washing (A0-F) was 3.4, indicating good lightfastness after washing and good antibacterial properties before washing.

[0069] [Comparative Example 1] In Example 1, the procedure was carried out in the same manner as in Example 1, except that oxolinic acid and 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole were not added to the treatment solution. The results are shown in Table 1. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 5.08 before washing, indicating poor lightfastness. Furthermore, the index of antimicrobial activity (A) 50 The -F value was -1.9, indicating poor antibacterial properties. Furthermore, the color difference ΔE after washing was 4.95, and the antibacterial activity value (A0-F) before washing was -1.9, indicating poor lightfastness after washing and poor antibacterial properties before washing.

[0070] [Comparative Example 2] In Comparative Example 1, the procedure was carried out in the same manner as in Comparative Example 1, except that 0.015% by mass of oxolinic acid was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 8.67 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50 The -F value was 3.3, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 7.28, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 3.4, indicating good antibacterial properties before washing. Compared to Comparative Example 1, the ΔE value was larger, suggesting that quinoline compounds reduce lightfastness when cationic dyes are used.

[0071] [Comparative Example 3] In Comparative Example 1, the procedure was carried out in the same manner as in Comparative Example 1, except that 0.045% by mass of oxolinic acid was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 10.53 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50 The -F value was 3.4, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 10.76, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 3.4, indicating good antibacterial properties before washing. Note: Lightness L * The value was 38.51, showing a slight whitening compared to Comparative Example 2.

[0072] [Comparative Example 4] In Comparative Example 1, the procedure was carried out in the same manner as in Comparative Example 1, except that 0.080% by mass of oxolinic acid was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 12.98 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50 The -F value was 3.3, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 12.01, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 3.4, indicating good antibacterial properties before washing. Note: Lightness L * The value was 39.92, showing a slight whitening compared to Comparative Examples 2 and 3.

[0073] [Comparative Example 5] In Comparative Example 1, the procedure was carried out in the same manner as in Comparative Example 1, except that 0.150% by mass of oxolinic acid was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 17.62 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50 The -F value was 3.4, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 17.34, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 3.4, indicating good antibacterial properties before washing. Note: Lightness L *The value was 49.70, showing significant whitening compared to comparative examples 2-4.

[0074] [Comparative Example 6] In Comparative Example 1, the procedure was carried out in the same manner as in Comparative Example 1, except that 0.100 by mass of 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.44 before washing, indicating good lightfastness, but the antibacterial activity index (A 50 The -F value was -1.9, indicating poor antibacterial properties after 50 high-temperature accelerated washes. The color difference ΔE after washing was 1.68, indicating good lightfastness, but the antibacterial activity value (A0-F) before washing was -1.7, indicating poor antibacterial properties before washing.

[0075] [Comparative Example 7] In Comparative Example 1, the procedure was carried out in the same manner as in Comparative Example 1, except that a disperse dye (Dianix Black CC-Rnew: manufactured by Dystar Co., Ltd.) was used instead of a cationic dye, and the concentration was 0.225% by mass. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.54 before washing, indicating good lightfastness, but the antibacterial activity index (A 50 The -F value was -2.0, indicating poor antibacterial properties after 50 high-temperature accelerated washes. The color difference ΔE after washing was 1.50, indicating good lightfastness, but the antibacterial activity value (A0-F) before washing was -1.8, indicating poor antibacterial properties before washing.

[0076] [Comparative Example 8] In Comparative Example 7, the procedure was carried out in the same manner as in Comparative Example 7, except that 0.004% by mass of oxolinic acid was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.93 before washing, indicating good lightfastness. Furthermore, the antibacterial activity index (A) 50The -F value was 1.6, indicating good antibacterial properties after 50 high-temperature accelerated washes. The color difference ΔE after washing was 1.76, and the antibacterial activity value (A0-F) before washing was 2.0, indicating good lightfastness after washing and good antibacterial properties before washing. However, compared to when cationic dyes were used, the use of disperse dyes resulted in lower color development and a less distinct fiber structure.

[0077] [Comparative Example 9] In Comparative Example 8, the procedure was carried out in the same manner as in Comparative Example 8, except that the dye was changed to a cationic dye (Kayacryl Blue BG-ED: manufactured by Nippon Kayaku Co., Ltd.). The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 5.10 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50 The -F value was 1.2, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 4.96, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 1.3, indicating good antibacterial properties before washing.

[0078] [Comparative Example 10] In Comparative Example 6, the procedure was carried out in the same manner as in Comparative Example 6, except that 0.002% by mass of oxolinic acid was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 1.49 before washing, indicating good lightfastness, but the antibacterial activity index (A 50 The -F value was -0.6, indicating poor antibacterial properties after 50 high-temperature accelerated washes. Furthermore, while the color difference ΔE after washing was 1.66, indicating good lightfastness, the pre-wash antibacterial activity value (A0-F) was -0.1, indicating poor antibacterial properties before washing.

[0079] [Comparative Example 11] In Comparative Example 6, the procedure was carried out in the same manner as in Comparative Example 6, except that 0.023% by mass of oxolinic acid was added. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 2.19 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50The -F value was 3.4, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 2.06, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 3.2, indicating good antibacterial properties before washing.

[0080] [Comparative Example 12] In Comparative Example 11, the procedure was carried out in the same manner as in Comparative Example 11, except that 0.200% by mass of 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was used. The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 2.11 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50 The -F value was 3.3, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 2.08, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 3.1, indicating good antibacterial properties before washing.

[0081] [Comparative Example 13] In Example 1, the procedure was carried out in the same manner as in Example 1, except that 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was added at 0.225% by mass. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 1.48 before washing, indicating good lightfastness, but the antibacterial activity index (A 50 The -F value was -0.8, indicating poor antibacterial properties after 50 high-temperature accelerated washes. Furthermore, while the color difference ΔE after washing was 1.57, indicating good lightfastness, the pre-wash antibacterial activity value (A0-F) was -0.2, indicating poor antibacterial properties before washing.

[0082] [Comparative Example 14] In Example 6, the procedure was carried out in the same manner as in Example 6, except that 0.013% by mass of 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole was used. The cationic dyeable polyester fiber structure obtained through the above steps had a color difference ΔE of 3.10 before washing, indicating poor lightfastness, but the antibacterial activity index (A50 The -F value was 3.4, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 3.06, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 3.4, indicating good antibacterial properties before washing.

[0083] [Comparative Example 15] (1) Preparation of cationic dyeable polyester fiber base material A cationic dyeable polyester fiber base material was prepared by heat-setting a fabric using a woven material with cation-dyeable polyester fibers as warp and weft threads. The fabric consisted of cation-dyeable polyester fibers made of copolymerized polyethylene terephthalate copolymerized with 1.7 mol% 5-sodium sulfoisophthalic acid, with 167 dtex-72 filaments (single fiber fineness 2.32 dtex) as the warp and weft threads, and then heat-setting the fabric at 175°C for 0.5 minutes using dry heat.

[0084] (2) Chemical treatment process by bath processing A treatment solution consisting of a cationic dye, a quinoline compound, and a dyeing acid was prepared. The following chemicals were used, and the mass ratio of each chemical to the mass of the treatment solution was adjusted as follows. • Cationic dye: Kayacryl Blue BG-ED (manufactured by Nippon Kayaku Co., Ltd.), 0.200% by mass • Quinoline compound: Oxolinic acid, 0.012% by mass • Staining acid: Mixed aqueous solution of 70% by mass acetic acid / 30% by mass sodium acetate, 0.005% by mass Subsequently, the cationic dyeable polyester fiber substrate was immersed in the treatment solution prepared above and subjected to chemical treatment under pressure at 120°C for 30 minutes in a bath processing machine. After that, the cationic dyeable polyester fiber substrate was removed from the bath processing machine and washed and dewatered. The bath processing machine used was the following apparatus, and the bath ratio was as follows. • Bath processing machine: 12-color rotary pot dyeing test machine (MINI-COLOUR 12EL model: manufactured by Texam Giken Co., Ltd.) • Bath ratio (mass of cationic dyeable polyester fiber substrate:mass of treatment solution): 1:10 (3) Chemical treatment process by pad processing A treatment solution consisting of an ultraviolet absorber was prepared. The following chemicals were used, and the ratio of the mass of the ultraviolet absorber to the mass of the treatment solution was adjusted as follows. • UV absorber: 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 0.100% by mass Subsequently, the cationic dyeable polyester fiber substrate was immersed in the treatment solution prepared above, and then compressed with a mangle roller to ensure the treatment solution adhered to it. After that, the cationic dyeable polyester fiber substrate was placed in a pin tenter and subjected to moist heat treatment at 130°C for 2 minutes.

[0085] (4) Post-heat treatment process A cation-dyeable polyester fiber substrate treated with a chemical solution was set in a pin tenter, and a dry heat setting was performed at 170°C for 1 minute to obtain a cation-dyeable polyester fiber structure. The results are shown in Table 1.

[0086] The cation-dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 3.10 before washing, indicating poor lightfastness, but the antibacterial activity index (A 50 The -F value was 3.0, indicating good antibacterial properties after 50 high-temperature accelerated washes. Furthermore, the color difference ΔE after washing was 4.03, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 2.8, indicating good antibacterial properties before washing.

[0087] [Comparative Example 16] (1) Preparation of cationic dyeable polyester fiber base material A cationic dyeable polyester fiber base material was prepared by heat-setting a fabric using a woven material with cation-dyeable polyester fibers as warp and weft threads. The fabric consisted of cation-dyeable polyester fibers made of copolymerized polyethylene terephthalate copolymerized with 1.7 mol% 5-sodium sulfoisophthalic acid, with 167 dtex-72 filaments (single fiber fineness 2.32 dtex) as the warp and weft threads, and then heat-setting the fabric at 175°C for 0.5 minutes using dry heat.

[0088] (2) Chemical treatment process by bath processing A treatment solution consisting of a cationic dye, an ultraviolet absorber, and a dyeing acid was prepared. The following agents were used, and the mass ratio of each agent to the mass of the treatment solution was adjusted as follows. • Cationic dye: Kayacryl Blue BG-ED (manufactured by Nippon Kayaku Co., Ltd.), 0.200% by mass • UV absorber: 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 0.100% by mass • Staining acid: Mixed aqueous solution of 70% by mass acetic acid / 30% by mass sodium acetate, 0.005% by mass Subsequently, the cationic dyeable polyester fiber substrate was immersed in the treatment solution prepared above and subjected to chemical treatment under pressure at 120°C for 30 minutes in a bath processing machine. After that, the cationic dyeable polyester fiber substrate was removed from the bath processing machine and washed and dewatered. The bath processing machine used was the following apparatus, and the bath ratio was as follows. • Bath processing machine: 12-color rotary pot dyeing test machine (MINI-COLOUR 12EL model: manufactured by Texam Giken Co., Ltd.) • Bath ratio (mass of cationic dyeable polyester fiber substrate:mass of treatment solution): 1:10 (3) Chemical treatment process by pad processing A treatment solution consisting of quinoline compounds was prepared. The following chemicals were used to adjust the ratio of the mass of the quinoline compounds to the mass of the treatment solution as follows. • Quinoline compound: Oxolinic acid, 0.012% by mass Subsequently, the cationic dyeable polyester fiber substrate was immersed in the treatment solution prepared above, and then compressed with a mangle roller to ensure the treatment solution adhered to it. After that, the cationic dyeable polyester fiber substrate was placed in a pin tenter and subjected to moist heat treatment at 130°C for 2 minutes.

[0089] (4) Post-heat treatment process A cation-dyeable polyester fiber substrate treated with a chemical solution was set in a pin tenter, and a heat setting was performed at 170°C for 1 minute using dry heat to obtain a cation-dyeable polyester fiber structure.

[0090] The cationic dyeable polyester fiber structure obtained through the above process had a color difference ΔE of 4.67 before washing, indicating poor lightfastness. Furthermore, the antibacterial activity index (A 50 The -F value was -0.3, indicating poor antibacterial properties even after 50 high-temperature accelerated washes. The color difference ΔE after washing was 4.23, indicating poor lightfastness, but the antibacterial activity value (A0-F) before washing was 2.4, indicating good antibacterial properties before washing.

[0091] [Table 1] [Industrial applicability]

[0092] The cationic dyeable polyester fiber structure of the present invention exhibits excellent lightfastness and antibacterial properties after washing. Such cationic dyeable polyester fiber structure can be applied to various uses requiring lightfastness and high antibacterial properties, and can be used as fabric for clothing, bedding, towels, rugs, curtains, sheets, etc., and is also suitable for use in medical uniforms.

Claims

1. A cationic dyeable polyester fiber structure comprising a cationic dye, a quinoline compound, and an ultraviolet absorber, The quinoline compound is contained in an amount of 0.03% by mass or more and 0.80% by mass or less relative to the mass of the cationic dyeable polyester fiber structure. The quinoline compound is oxolinic acid, The aforementioned ultraviolet absorber is a benzotriazole compound, The benzotriazole compound is contained in an amount of 0.25% by mass or more and 2.00% by mass or less relative to the mass of the cationically dyeable polyester fiber structure. The color difference ΔE before and after irradiating the cationic dyeable polyester fiber structure with ultraviolet carbon arc light is 2.0 or less. Furthermore, in the antibacterial evaluation method described in the SEK Mark Textile Product Certification Standards, the antibacterial activity value after 50 high-temperature accelerated washes was A. ５０ If it is greater than the standard distribution growth value F, Cationic dyeable polyester fiber structure.

2. The cationic dyeable polyester fiber structure according to Claim 1, comprising 0.03% by mass or more and 0.20% by mass or less of the quinoline compound with respect to the mass of the cationic dyeable polyester fiber structure.

3. A medical uniform comprising a cationic dyeable polyester fiber structure according to claim 1 or 2.

4. A treatment solution preparation step involves preparing a treatment solution containing a cationic dye, a quinoline compound, and an ultraviolet absorber. A chemical treatment step involves immersing a fibrous substrate containing cationic dyeable polyester fibers in the aforementioned treatment solution and heat-treating it in a bath at a temperature of 110°C to 140°C under pressure. A post-heat treatment process involves dry heat treatment at an ambient temperature of 150°C to 190°C, A method for producing a cationically dyeable polyester fiber structure containing, The quinoline compound is oxolinic acid, In the processing solution preparation step, a processing solution containing the quinoline compound in an amount of 0.003% by mass or more and 0.080% by mass or less relative to the mass of the processing solution is used. The aforementioned ultraviolet absorber is a benzotriazole compound, In the processing solution preparation step, a processing solution containing the benzotriazole compound in an amount of 0.025% by mass or more and 0.200% by mass or less relative to the mass of the processing solution is used. The cationic dye, the quinoline compound, and the ultraviolet absorber are included. The quinoline compound is contained in an amount of 0.03% by mass or more and 0.80% by mass or less, relative to the mass of the cation-dyeable polyester fiber structure. The color difference ΔE before and after irradiating the cationic dyeable polyester fiber structure with ultraviolet carbon arc light is 2.0 or less. Furthermore, in the antibacterial evaluation method described in the SEK Mark Textile Product Certification Standards, the antibacterial activity value after 50 high-temperature accelerated washes was A. ５０ If it is greater than the standard distribution growth value F, A method for producing cationic dyeable polyester fiber structures.

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