JP2007177354A - Method for producing antimicrobial textile product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a blend of polyester fiber and cellulose fiber, which does not cause reduction in antimicrobial performance after dyeing and processing, has excellent antimicrobial properties and excellent feeling, moisture absorption property and water absorption property. <P>SOLUTION: The method for producing an antimicrobial textile product comprises treating with 0.01-3 wt.% of a nonvolatile acid, a textile product of blend of polyester fiber and cellulose fiber containing an inorganic antimicrobial agent prepared by supporting one or more antimicrobial metal components selected from silver, zinc, copper, tin, gold and platinum on an inorganic compound. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mixed article of polyester fiber and cellulose fiber having excellent antibacterial properties. More specifically, the present invention relates to a mixed fabric product of polyester fiber and cellulose fiber that exhibits excellent antibacterial properties and is excellent in moisture absorption, water absorption quick drying, dyeability, and texture.

Polyester fibers have excellent mechanical properties, chemical properties, processability, and easy care properties, and are therefore widely used for clothing, bedding, interiors, industrial materials, and the like.
In recent years, in these fiber applications, there is an increasing demand for fibers imparted with antibacterial properties as one of comfort functions.
In general, as a method for imparting antibacterial properties to fibers, a method in which an aromatic halogen compound, an organic silicone quaternary ammonium salt, an organic nitrogen compound, or the like is attached to the fibers is employed. There was a problem with washing durability because it easily dropped off.
In view of this, inorganic antibacterial agents are particularly attracting attention as having excellent antibacterial properties when contained in fibers. Most inorganic antibacterial agents are those in which metal ions such as silver, copper, and zinc are supported on inorganic compounds by various methods in order to exert antibacterial properties, and zeolites that support silver, copper, and zinc ions. A polymer composition such as a fiber containing particles as an antibacterial agent is disclosed in Patent Document 1.

In polyester fibers, attempts to obtain antibacterial fibers containing an inorganic antibacterial agent in which various metal ions, mainly silver ions, are supported on an inorganic compound by various methods have been energetically performed recently. Polyester fibers containing antibacterial and antibacterial inorganic antibacterial agents improve the physical properties such as texture, hygroscopicity, and water absorption. Has been commercialized. However, a dyed processed product of a mixture of antibacterial polyester fibers and cotton fibers has a problem that the antibacterial performance is lowered. This problem seems to be caused by impurities such as proteins and pigments contained in the cotton fiber, but the detailed mechanism by which the antibacterial performance is lowered by dyeing of mixed products is unknown.
Patent Document 2 discloses an antibacterial fiber in which at least a surface of a fiber made of a fiber-forming polymer containing an antibacterial zeolite is coated with a resin having a positively charged group. However, the antibacterial polyester fiber obtained by this method is mixed with cotton fiber, bleached, and dyed and processed, the antibacterial performance is poor and the performance has not been improved.
Therefore, at present, antibacterial polyester fiber and cellulose fiber mixed fabric dyed products exhibit excellent antibacterial performance without deterioration of antibacterial performance due to dyeing, and also provide dyed products with excellent hygroscopicity and water absorption. The actual situation is not.

Japanese Examined Patent Publication No. 63-054013 Japanese Patent Laid-Open No. 04-119169

  The present invention is a mixed product of antibacterial polyester fiber and cellulose fiber, which does not cause deterioration in antibacterial performance after dyeing and has excellent antibacterial performance and is excellent in the original texture, hygroscopicity and water absorption of cellulose fiber. It is an object of the present invention to provide a method for producing an antibacterial fiber product capable of obtaining a mixed dyed product.

As a result of diligent research on the dyeing process of a mixed fabric of antibacterial polyester fiber and cellulose fiber, the present inventor has solved the above problem by incorporating a non-volatile acid into the mixed fabric of antibacterial polyester fiber and cellulose fiber. As a result of finding out and solving the problem, the present invention has been made.
That is, the present invention is as follows.
(1) A mixed product comprising a polyester fiber containing an inorganic antibacterial agent in which one or more antibacterial metal components selected from silver, zinc, copper, tin, gold, and platinum are supported on an inorganic compound, and a cellulose fiber. Is processed with a non-volatile acid having a concentration of 0.01 to 3% by weight.

  By including a non-volatile acid in a mixed product of antibacterial polyester fiber and cellulose fiber, it is possible to obtain a mixed dyeing product that has excellent antibacterial performance and excellent cotton original texture, hygroscopicity, and water absorption Play.

The present invention will be described in detail below.
The present invention is characterized in that a non-volatile acid is contained in a mixed dyed product of an inorganic antibacterial agent-containing polyester fiber and cellulose fiber carrying an antibacterial metal component.
The inorganic antibacterial agent in the present invention is not particularly limited as long as it is an inorganic compound supporting at least one selected from silver, zinc, copper, tin, gold, and platinum, and is an inorganic compound supporting these metal ions. For example, inorganic adsorbents such as activated carbon, activated alumina, silica gel, zeolite, hydroxyapatite, zirconium phosphate, titanium phosphate, potassium titanate, hydrous antimony, hydrous bismuth, hydrous zirconium oxide, hydrous titanium oxide And inorganic ion exchangers such as hydrotalcite.
In particular, an antibacterial agent in which a metal component is supported on zeolite has excellent metal component support properties, excellent antibacterial performance stability and durability, and has the advantage of less discoloration when kneaded into polyester. This is preferable.
There are no particular limitations on the method of supporting the metal ions in the present invention on these inorganic compounds, for example, a method of supporting by physical adsorption or chemical adsorption, a method of supporting by ion exchange reaction, a method of supporting by a binder, a metal Examples thereof include a method of supporting a compound by implanting it into an inorganic compound, a method of supporting a compound by forming a thin layer of a metal compound on the surface of the inorganic compound by a thin film forming method such as vapor deposition, dissolution precipitation reaction, and sputtering.

The average particle diameter of the inorganic antibacterial agent is preferably 5 μm or less, and more preferably 2 μm or less, from the viewpoint of operability during spinning. If the particle diameter exceeds 5 μm, the spinning filter pressure increases, yarn breakage during spinning, and fluff defects during stretching increase, which is not preferable.
The metal component content in the inorganic particles is suitably from 0.1 to 20% by weight. In particular, silver is excellent in antibacterial performance, and a sufficient effect is obtained at 0.1 to 5% by weight. When the supported amount of silver is less than 0.1% by weight, the antibacterial property of the obtained fiber is not sufficient, and when it exceeds 5% by weight, the whiteness of the obtained fiber is lowered. The supported amount of metal components such as zinc, copper, tin, gold and platinum is 20% by weight or less, preferably 0.1 to 15% by weight. The combined use of silver, zinc, copper and other metals can be said to be a preferred method in the sense of complementing the advantages and disadvantages such as antibacterial performance, dispersibility, coloration, and cost due to carrying each metal component.
The mixing amount of the antibacterial inorganic particles in the polyester is 0.3 to 2.0% by weight. The optimum range of the addition amount varies depending on the content and composition of the metal component in the inorganic particles. However, if the addition amount exceeds 2.0% by weight, the pack pressure rises rapidly, and the spinning stability is unfavorable.

In order to impart water absorption to the polyester fiber of the present invention and stabilize the antibacterial performance, the flatness of the single yarn is preferably 2.0 to 4.0. When the flatness exceeds 4.0, it becomes close to a mere flat yarn, water absorption characteristics due to capillary action become insufficient, and antibacterial performance becomes unstable. On the other hand, even if the flatness is less than 2.0, the water absorption characteristics are insufficient, and the antibacterial performance becomes unstable because the specific surface area approximates that of a round cross-section yarn.
In order to stabilize the antibacterial performance with a low concentration of the antibacterial agent, the cross-sectional shape of the single yarn of the polyester fiber of the present invention is W-shaped, and the opening angle of each recess is 100 to 150 degrees. preferable.
Examples of a method for highly atypifying polyester to impart water absorption include those in which the shape of the single yarn cross-section is a Y-shaped cross-section, a cross-shaped cross-section, an H-shaped cross-section, a star-shaped cross section, etc. However, the water absorption is improved and the antibacterial property is stabilized, but the disadvantage that the fabric has a hard texture becomes obvious. From this, by making the cross-sectional shape of the single yarn into a W-shaped cross section, polyester fibers having excellent antibacterial performance with a small amount of antibacterial agent contained due to the provision of water absorption and a soft texture can be obtained.

Next, the manufacturing method of the polyester fiber in this invention is described.
In the polyester fiber as used in the present invention, at least 90% of the structural unit is ethylene terephthalate, and in addition to the polyethylene glycol component, other components of 5 mol% or less may be copolymerized. For example, a polymer obtained by polymerizing a small amount of a chain branching agent such as pentaerythritol, trimethylolpropane, trimellitic acid, boric acid or the like may be used.
In addition to the copolymer components, ordinary transesterification catalysts, polymerization catalysts, phosphorus compounds, matting agents such as titanium dioxide, coloring inhibitors, oxidative decomposition inhibitors, antifoaming agents, fluorescent whitening agents, pigments, etc. May be included as necessary.

As a method of kneading the antibacterial inorganic particles into the polyester, there is a method in which the antibacterial inorganic particles are dispersed and added to ethylene glycol or the like at the time of polyester polymerization, chipped after polymerization is completed, and melt-spun. In addition, there are a method in which antibacterial inorganic particles are directly kneaded into a polyester chip and melt spinning, a method in which a master chip is formed and the polyester and the polyester chip are mixed and then spun. When antibacterial inorganic particles containing a silver component are added at the time of polymerization, the silver component is discolored by a catalyst or an additive used for polyester polymerization, and the polymer color tone is deteriorated. In addition, the antibacterial inorganic particles are directly kneaded into the polyester chip and melt-spun, so that the inorganic particles are not sufficiently dispersed in the polyester, and defects such as an increase in the spinning filter pressure and yarn breakage become apparent. It becomes.
On the other hand, the method of kneading the antibacterial inorganic particles with the master chip is not only kneading into the polyester at the stage of becoming a master chip, but further kneading with the polyester in the spinning process, and the inorganic to the polyester in two stages Since the system particles are kneaded, fine dispersion of the inorganic particles is superior to other methods. Further, since the kneading time is short, there is little change in the color tone of the polyester, and a fiber with good color tone and level dyeing can be obtained. Therefore, the kneading method using a master chip is the most preferable method in terms of stability such as physical properties, color tone, and productivity of the polyester fiber.

The concentration of the antibacterial inorganic particles in the master chip used in the present invention is 5 to 30% by weight, preferably 10 to 20% by weight. If it exceeds 30% by weight, the dispersibility of the inorganic particles is insufficient, and if it is less than 5% by weight, the efficiency decreases, which is not preferable.
The antibacterial polyester fiber of the present invention is not particularly limited, but a fiber having a total fineness of 30 to 250 dtex is preferably applied. The form of the fibers may be long fibers or short fibers, and may be uniform or thick in the length direction. And as the form of the yarn in which the fiber is processed, a spun yarn such as a ring spun yarn, an open-end spun yarn, an air jet fine spun yarn, a sweet twisted yarn to a strongly twisted yarn, a false twisted yarn (including POY drawn false twisted yarn) ), Air injection processed yarn, indented processed yarn, knitted knitted yarn, and the like.
In the present invention, the mixed cellulose fiber refers to cotton, hemp, viscose rayon, cupra fiber and the like.
The mixing ratio of the polyester fiber and the cellulose fiber in the mixed article of the present invention is preferably about 75% by weight or less for the polyester fiber. The ratio of mixed use is selected according to the form or use of the mixed product. In addition, spandex, polyamide, acrylic, protein fiber, and the like may be mixed.

  The form of the mixed article of the polyester fiber and the cellulose fiber of the present invention can be a thread form or a cloth form. Examples of yarn forms include blended yarn (blended cotton, fleece blended, sliver blended, core yarn, silo span, silofill, hollow spindle, etc.), entangled blended yarn, twisted yarn, design twisted yarn, covering (single, double), composite temporary Examples of the mixed use include twisting (simultaneous false twisting, first twist false twisting), elongation difference false twisting, phase difference, post-mixing after false twisting, and two-feed (simultaneous feed or feed difference) air jet machining. On the other hand, as an example of the form of the fabric, there is a general knitting. For example, in the knitting, the yarns are aligned and fed, or a double knitted fabric (for example, a double circular knitting machine, a double flat knitting machine, a double knitting machine) In the case of a raschel warp knitting machine), there may be mentioned a method of feeding yarns on the front surface and / or the back surface, respectively. In cross knitting, one is used for warp and the other is used for weft. In warp and / or weft, one to three are alternately arranged by warping or weft insertion. And the other comprises a raising part and a pile part, and mixes and comprises a ground structure, a raising part, etc., and the surface and / or back side are each comprised in a double woven fabric, or it comprises and mixes, etc. are mentioned. Further, a combination of these various yarn stages and a combination on the machine may be combined. In particular, sheath-core composite yarns and twisted yarns, which are composed of polyester fibers in the core and cellulose fibers in the sheath, maintain dimensional stability, stretchability and anti-wrinkle properties while maintaining the texture of the cellulose fibers. It is also preferable to provide functionality such as.

The non-volatile acid used in the present invention refers to an acid that does not substantially volatilize at room temperature (25 ° C.), and is generally preferably selected from organic acids, inorganic acids, and phosphoric acid-based organic acids. Has a boiling point of 120 ° C. or higher, propionic acid, butyric acid, valeric acid, succinic acid, malonic acid, succinic acid, glutaric acid, malic acid, tartaric acid, citric acid, gluconic acid, ascorbic acid and other organic acids, phosphoric acid Inorganic acids such as pyrophosphoric acid, metaphosphoric acid, boric acid, and metaboric acid.
The surface of the polyester fiber or cellulose fiber is generally negatively charged, and the surface of the antibacterial polyester fiber after dyeing is particularly negatively charged. On the other hand, since the surface of the microbial cell is negatively charged, it is presumed that it is difficult to obtain a stable antibacterial property because the microbial cell hardly approaches the surface layer of the fiber at the time of antibacterial evaluation.

By treating with the non-volatile acid of the present invention, both the polyester fiber and the cellulose fiber decrease the jetter potential of the fiber surface, and the jetter potential of the fiber surface of the mixed fabric decreases, so that the bacterial cells are attracted to the fiber surface and captured. Therefore, good antibacterial performance can be obtained stably by the excitation action of metal ions in the antibacterial agent.
The non-volatile acid of the present invention is preferably applied to the mixed fabric of the antibacterial polyester fiber and the cellulose fiber at the dyeing process stage, and particularly preferably treated at the stage when the dyeing of cotton is completed. The treatment method is not particularly limited and can be used as appropriate. For example, the treatment method may be applied by a method such as immersion treatment, padding treatment, spray treatment, and the like, then dried at around 100 ° C. and then heat treated at 160 ° C. or less.
In addition, other chemicals such as a water-absorbing agent, a softening agent and an antistatic agent may be used in combination.

  When dyeing mixed antibacterial polyester fibers and cellulose fibers according to the present invention, when antibacterial polyester fibers are dyed with disperse dyes, any dyeing conditions are usually applied as long as the polyester fibers are dyed with disperse dyes. The type of dyeing assistant and its concentration, dyeing pH, dyeing bath ratio, dyeing time, etc. may be appropriately set in consideration of the kind of article to be dyed, the processing apparatus used, and the dyeing method. As disperse dyes, use of azo disperse dyes represented by benzeneazo (monoazo, disazo, naphthaleneazo) and heterocyclic azo (thiazoleazo, benzothiazoleazo, quinolineazo, pyridoneazo, imidazoleazo, thiophenazo, etc.) Is preferred for enhancing the color developability of the antibacterial polyester fiber, and improving the same colorability with the cellulose fiber and the fastness to dyeing. In particular, when the dyeing density is low, it is preferable to use a disperse dye having a diffusion index of 3.0 or more because color variation between dyeing batches is reduced. In addition, it is preferable to use an aromatic polyether block copolymer in combination at the time of dyeing in order to improve water absorption performance in a mixed product.

Cellulose fibers can be dyed directly under any conditions where cellulose fibers are usually dyed with a reactive dye or the like. The dyeing method can be a two-bath dyeing method with a disperse dye or a one-bath two-step dyeing method. A one-bath dyeing method may be appropriately performed.
Further, when cotton or rayon is used as the cellulose fiber, when the bleaching treatment is performed prior to dyeing, the treatment may be carried out by a method using hydrogen peroxide and an alkali agent that are usually used.
The dyeing temperature at the time of dyeing is preferably 135 ° C. or less, and the dyeing operation can be carried out by either a batch method or a continuous method using an apparatus such as a wins, a jigger, a beam dyeing machine or a liquid dyeing machine. In addition to the dip dyeing, a padding dyeing method and a printing method can be used.
In the dyed article of the mixed fabric comprising the antibacterial polyester fiber and the cellulose fiber of the present invention, the set temperature at the finish setting is preferably 160 ° C. or less from the viewpoint of dyeing fastness.
The mixed product of antibacterial polyester fiber and cellulose fiber thus obtained has a soft and supple texture, exhibits excellent antibacterial performance, and has excellent water absorption performance and high commercial value. Can be obtained.

Examples The present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. In addition, the measuring method of the characteristic value used by this invention is shown below.
(1) Flatness Flatness was calculated | required by ratio of the long side A and the short side B of the circumscribed rectangle of the single yarn cross section of a fiber by following Formula.
Flatness = long side A / short side B
(2) Evaluation of antibacterial properties The antibacterial properties were evaluated in accordance with the unified test method of the Textile Products Hygiene Processing Council (SEK). Samples dried in a clean bench after sterilization (about 18 mm square test piece 0.4 g) were sterilized by high-pressure steam sterilization and ice-cooled in a 1/20 concentration nutrient broth. Inoculate 0.2 ml of the test bacteria suspension adjusted to 3 × 10 ⁵ cells / ml so that the entire specimen is immersed uniformly, and tighten the sterilized cap. This was cultured at 37 ± 1 ° C. for 18 hours, and the number of viable bacteria after the culture was measured. There are two types of specimens, a standard cloth (a cloth specified in the processing effect evaluation test manual for antibacterial and deodorant processed products) and a processed cloth. As test bacteria, Staphylococcus aureus ATCC 6538P is used, and The bacteriostatic activity value, which is an antibacterial index, was calculated by this method.
Bacteriostatic activity value: LogB-LogC
However, the test establishment condition (LogB-LogA)> 1.5 shall be satisfied.
A: Average number of bacteria collected immediately after inoculation with standard cloth B: Average number of bacteria after 18 hours of culture of standard cloth C: Average number of bacteria after 18 hours of culture of test cloth Bacteriostatic activity value is 2.2 The above were judged to have antibacterial properties.

[Example 1]
Polyethylene terephthalate chip containing 0.4% by weight of titanium oxide and having an intrinsic viscosity [η] of 0.60 measured in orthochlorophenol at 35 ° C. and 1% by weight and antibacterial zeolite particles (FK43; manufactured by Fuji Chemical) Master pellets containing 10% by weight of an average particle size of 2.0 μm, a silver content of 0.5%, and a zinc content of 19%) are individually and continuously dried, and the moisture content of the chip is reduced to 50% or less. The mixture was mixed with a powder metering mixer (Matsui Seisakusho: Jet Color) so that the antibacterial zeolite particles would be 0.5%, and supplied to an extruder equipped with a barrier type screw (Maddock type). Chips mixed at a constant ratio are melted by an extruder, then passed through a polymer pipe in which 10 elements of a Kenix static mixer are installed, and introduced into a spinning pack having a filtration layer.
The polymer containing antibacterial zeolite was extruded from a nozzle having 30 spinning holes perforated in a W shape at a spinning temperature (spinhead temperature) of 290 ° C. and a spinning speed of 2000 m / min. The filament is heated by heating, set with a second drawing roll at 130 ° C., drawn so that the elongation becomes 30 to 35%, and the single yarn cross-sectional shape is 56 dtex / w with a W-shaped cross-section. A drawn filament of 30 filaments was obtained (opening angle 135 ° inside recess, flatness 3.3).

Next, the obtained raw yarn and cotton 60/1 were twisted, and this twisted yarn and 84 dtex / 31 filament rayon yarn were used to mill milling under normal knitting conditions using an 18 gauge circular knitting machine. A ground (honeycomb structure) was prepared. This knitted fabric had an antibacterial polyester fiber mixed rate of about 40% and a basis weight of 128 g / m ² .
This mixed knitted fabric is bleached at 90 ° C. for 30 minutes with an aqueous solution containing 1% aqueous hydrogen peroxide adjusted to pH 11 with caustic soda, dechlorinated, and dyed under the following dyeing conditions. It was.
Dyeing conditions Dye: Dianics Yellow AC-E 0.16% omf
Dianics Red AC-E 0.13% omf
Dianics Blue AC-E 0.04% omf
(The above is made by Dystar)
Kayatheron React Yellow CN-603 0.18% omf
Kayatheron React Red CN-603 0.05% omf
Kayatheron React Blue CN-MG 0.03% omf
(The above is made by Nippon Kayaku Colors Co., Ltd.)
Kayak buffer P-7 1 g / liter Salt glass: 30 g / liter SR-1801M Conch (manufactured by Takamatsu Yushi Co., Ltd.) 4% omf
Bath ratio: 1:15
Dyeing temperature and time: 130 ° C., 30 minutes After dyeing was completed, soaping and water washing were performed at 60 ° C. for 15 minutes in a nonionic detergent 0.5 g / liter bath, and non-volatile acid treatment was performed under the following conditions. .
Treatment agent: Malic acid 0.5%
Bath ratio: 1:20
Treatment temperature and time: 40 ° C., 10 minutes After the treatment, the product was dehydrated and finished with a dry heat set at 130 ° C. for 2 minutes.
Table 1 shows the antibacterial evaluation results of the finished mixed dyed product.
The ζ potential on the fiber surface was −9.3 mv (measured with a measuring machine manufactured by Otsuka Electronics).

[Comparative Example 1]
For comparison, dyeing and soaping were performed under the same conditions as in Example 1, followed by dehydration and finishing at 130 for 2 minutes with a dry heat set. The antibacterial evaluation results of the finished mixed dyed product are shown in Table 1. The ζ potential on the fiber surface was −56.3 mv.
From the results shown in Table 1, it can be seen that the mixed product obtained in Example 1 of the present invention exhibits better antibacterial performance than Comparative Example 1, and a mixed product having a high commercial value can be obtained.

[Example 2]
An antibacterial polyester yarn of 84 dtex / 30 filament (opening angle 130 ° inside recess, flatness 3.0) was obtained by the production method of Example 1. The obtained raw yarn is used as the weft, and the cup yarn is 84 decitex / 75 filament (made by Asahi Kasei Fibers Co., Ltd., trade name Bemberg) as the warp, and the plain fabric (the warp density is 106 yarns / inch, the weft density is 96 yarns / inch). ) Was prepared. (The mixing ratio of antibacterial polyester fiber is 50%)
The obtained woven fabric was scoured and relaxed at 80 ° C. in an expanded form, pre-set at 180 ° C., and dyed under the following dyeing conditions. In addition, the dye density | concentration was made into the density | concentration with respect to the polyester fiber weight.
Dyeing conditions Dye: Dianics Navy SG (200) 1.5% omf
(Dystar)
Dispersing leveling agent: Nikka Sun Salt RM-340 (manufactured by Nikka Chemical Co., Ltd.)
0.5 g / liter Acetic acid: 0.5 cc / liter Sodium acetate: 1 g / liter SR-1801M Conch (manufactured by Takamatsu Yushi Co., Ltd.): 6% omf
Bath ratio: 1:15
Dyeing temperature and time: 130 ° C, 30 minutes

After the dyeing is completed, the dyeing residual liquid is discharged from the dyeing machine, water is added to the dyeing machine, the temperature is raised to 80 ° C., the following chemicals are added thereto to adjust a reducing washing bath having the following concentration, and 80 Reductive washing was carried out at 10 ° C. for 10 minutes.
Thiourea dioxide 1 g / liter Caustic soda 1 g / liter Bisnole UP-10 (manufactured by Yushi Kogyo Co., Ltd.) 0.5 g / liter Bath ratio: 1:15
After this reductive washing, the residual liquid was discharged, the dyed product was rinsed with warm water and water, and then the cupra side was dyed under the following conditions. In addition, the dye density | concentration was made into the density | concentration with respect to the cupra fiber weight.
Dyeing conditions Dye: Remazole Black B 1.5% omf
Salt glass: 150 g / liter Sodium carbonate: 20 g / liter Bath ratio: 1:10
Dyeing temperature and time: 60 ° C., 80 minutes These dyed products were then washed with hot water and soaped by conventional methods, and then treated with a non-volatile acid under the following conditions.
Treatment agent: Citric acid 0.6%
Bath ratio: 1:20
Treatment temperature and time: 40 ° C., 10 minutes After the treatment, dehydration, drying, and dry heat setting at 150 ° C. for 30 seconds were performed, and paper calendar treatment was performed to finish.
Table 2 shows the antibacterial performance evaluation results of the finished dyeings.

[Comparative Example 2]
As a comparison, Example 2 was similarly finished except that the non-volatile acid treatment was not performed. Table 2 shows the antibacterial performance evaluation results of the finished dyeings.
From the results shown in Table 2, it can be seen that the mixed article according to Example 2 of the present invention shows better antibacterial performance and is better than Comparative Example 2.

  The mixed article of the present invention can be suitably used particularly in the inner field, the lining field, and the bedding field.

Claims (1)

  Concentration of a mixed product consisting of polyester fiber containing an inorganic antibacterial agent in which one or more antibacterial metal components selected from silver, zinc, copper, tin, gold and platinum are supported on an inorganic compound and cellulose fiber is 0 A method for producing an antibacterial fiber product, characterized by treatment with 0.01 to 3% by weight of a non-volatile acid.