JPH11350280A - Mixed fineness yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a combined filament yarn of heterofineness, having refreshing dry feeling and bulkiness and having both antistatic and antimicrobial properties by commingling a sheath-core composite yarn of large fineness which contains an antistatic agent in the core part with a yarn of small fineness and by applying an antimicrobial agent to the whole of the combined filament yarn. SOLUTION: The combined filament yarn of heterofineness in which a yarn of filament fineness >=2.5 denier and a yarn of filament fineness <=1.5 denier are intermingled is produced by the following steps: (1) conducting the doubling between <=20 wt.% yarn of larger fineness and a polyester yarn of smaller fineness while winding the yarns in a spinning procedure, wherein the yarn of larger fineness has a sheath-core structure and its core part is made of a polyester containing 10-50 wt.% antistatic agent (e.g. polyalkylene glycol); (2) applying 0.1-5.0 wt.% antimicrobial agent (e.g. silver zeolite) to the combined filament yarn; (3) drawing the yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed-filament yarn which gives a woven or knitted fabric an excellent dry feeling and a swelling feeling, and has excellent antibacterial and antistatic properties.

[0002]

2. Description of the Related Art Conventionally, studies have been made to impart various functions to synthetic fibers. For example, anti-static properties are provided for the purpose of suppressing static electricity generated in a woven or knitted fabric under low humidity such as in winter. Various yarns have been studied and are already in practical use. Furthermore, in recent years, demands for polyester fibers having various functions have been increasing due to diversification of consumers' values and consciousness of hygiene, and various antibacterial fibers have been put into practical use as a part thereof. In particular, there has been a strong demand for materials that have antibacterial properties and antistatic properties and also have a feeling of dryness, swelling and the like for clothing (especially for innerwear) and medical applications.

First, a method of imparting antistatic performance to a woven or knitted fabric and exhibiting a dry feeling, a soft feeling, or a swelling effect is disclosed in, for example, JP-A-55-158333 and JP-A-59-158333.
-228033. According to these publications, the single yarn fineness is set to 1.5 denier or less, or a difference in shrinkage is provided between the yarn groups to soften the woven or knitted fabric, thereby exhibiting the effect of bulging. However, the yarns made of these fineness yarns or mixed shrinkage yarns have not been devised in any way for the fineness composition between the single yarns, and the dryness and swelling are sufficiently satisfactory only with the effect of the fineness or the difference in shrinkage ratio. No woven or knitted fabric with a feeling was obtained.

Japanese Patent Laid-Open No. Sho 62 (1994) discloses a mixed-filament yarn which satisfies these dry feeling and swelling feeling and has antistatic properties.
No. 149927. This mixed fiber has a certain effect in terms of texture and antistatic properties. However, in many applications requiring antistatic properties, antibacterial properties have become indispensable due to the rise in hygiene awareness in recent years, and texture and antistatic properties alone are not sufficient to meet consumer needs. .

[0005] On the other hand, many methods have been proposed for imparting antibacterial powder to synthetic fibers such as polyester fibers. As one example, a method in which antibacterial silver zeolite is mixed with polyester and melt-spun is disclosed in
59-133235, JP-B-63-54103 and JP-A-63
No. 175117. Synthetic fibers containing antibacterial zeolite have good antibacterial properties and excellent durability, but such antibacterial fibers have insufficient antistatic effect as they are, and temporarily provide an antistatic effect. If so, it is necessary to use a polymer having an antistatic property for a chip serving as a base, or to apply it to the fiber surface using a treating agent having an antistatic effect in a post-processing step.

In order to have both antistatic and antibacterial properties, it is necessary to knead an antibacterial agent and an antistatic agent into a polymer. In addition to this, not only the operability is poor, but also the properties of good polyester fibers are lost, resulting in a poor texture. Although there is a method of post-processing both or one of them, there is a problem in post-processing that the effect is reduced by washing. Therefore, a fiber having both antibacterial properties and antistatic properties and satisfying the texture has not yet been obtained.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and has antibacterial and antistatic properties.
An object of the present invention is to provide a mixed fiber having a different fineness suitable for a woven or knitted fabric excellent in dryness and swelling.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. With a core-sheath structure having an inhibitor, a specific amount of an antibacterial agent is contained in the yarn, and the mixing ratio of the fine and fine fineness components is appropriately set to provide antibacterial performance and antistatic performance, and The present inventors have found that a yarn having a sufficient dry feeling and swelling feeling can be obtained, and reached the present invention.

That is, the present invention relates to a yarn containing 20% by weight or more of a fineness yarn having a single yarn fineness of 2.5 denier or more and 5% by weight or more of a fineness yarn having a single yarn fineness of 1.5 denier or less. The yarn contains 0.1 to 5.0% by weight of an antibacterial agent, and at least the large fineness yarn has a core-sheath structure containing an antistatic agent only in a core portion. The main feature is a mixed fiber of different fineness.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The fineness of a single yarn in the mixed fineness yarn of the present invention must be such that a thick fineness yarn of 2.5 denier or more and a fine fineness yarn of 1.5 denier or less are integrally formed. In other words, the presence of thick fine yarn, firmness,
A woven or knitted fabric having a firm feeling or a dry feeling and having a soft feeling, a swelling feeling or a drape property due to the presence of the fineness yarn can be obtained.

On the other hand, if the fineness of the thick fineness yarn is less than 2.5 denier, the cross-sectional area of the single yarn is small, so that it is difficult to expect a repulsive force against a lateral force applied to the single yarn, or bending or twisting. Firmness is reduced, and furthermore, since there is little difference in fineness with fine fineness yarns, there is no unevenness, and a woven / knitted fabric with less surface effect is obtained. Therefore, in order to obtain a woven or knitted fabric having firmness, firmness or dryness, the single yarn fineness is preferably 2.5 denier or more, particularly preferably in the range of 5 to 7 denier. It is not preferable to use a woven or knitted fabric because it lacks a soft feeling or drape property and gives a stiff texture.

Therefore, in the present invention, the single-fiber fineness of the mixed fineness yarn is such that at least 20% by weight or more of fine denier yarn of 2.5 denier or more is present, and at the same time, 1.5 denier fineness of single yarn The following fineness yarns need to be present in an amount of 5% by weight or more. In the present invention, when the composition ratio of the large fineness yarn is less than 20% by weight, a dry feeling and a swelling feeling are lacking. On the other hand, when the fine yarn having a single yarn fineness of 1.5 denier or less is less than 5% by weight, the effect of the thick fine yarn becomes strong, the softness is lacking, and the woven or knitted fabric has a slight rigidity. The mixing ratio of the fine and fine yarns is not particularly limited as long as it is within the above range, and can be appropriately changed according to the desired texture.

Further, in the present invention, it is necessary that at least the large fineness yarn has a core-sheath structure having a cross section as shown in FIG. 1 and that only the core contains an antistatic agent.
In order to impart antistatic performance to the woven or knitted fabric, it is preferable to include an antistatic agent in all the single yarns constituting the mixed fineness yarn, but at least to the large fineness yarn which easily forms a core-sheath structure. Thus, practically sufficient antistatic performance can be imparted to the woven or knitted fabric. In FIG. 1, P1 is a polymer containing an antibacterial agent constituting a part of a sheath component and a core component, and P2 is an antistatic agent constituting a part of a core component or a polymer containing the same. In addition, the antistatic agent is contained only in the core portion of the large fineness yarn to prevent the antistatic agent from being exposed on the yarn surface, to make the dyeing property after knitting into a woven or knitted fabric, to make the weight reduction rate uniform, Further, it is suitable for suppressing fading after dyeing.

Examples of the antistatic agent include polyalkylene glycols, adducts of polyalkylene glycols, various metal salts of organic sulfonic acids, metal salts of phosphonic acids, metal salts of carboxylic acids, and copolymers thereof with polymers to be spun. Is mentioned. The antistatic agent may be added to the polymer at the stage of polymer polymerization or at the stage of spinning. Compatibility with polymers used among antistatic agents,
Alternatively, in consideration of thermal stability, a polyalkylene glycol or a copolymer of a polyalkylene glycol and a polymer to be subjected to spinning is preferably used. For example, a polyester obtained by copolymerizing a polyalkylene glycol in an amount of 10 to 50% by weight can be instantaneously mixed with another polymer in a spinning stage and used as a core component.

In order to minimize the elution of the antistatic agent located in the core by a swelling agent or a solvent contained during washing or dry cleaning, the core is made of an antistatic agent or a copolymer thereof. It is preferable to form a mixture of the polymer and the polymer constituting the core, and to widely mix and disperse the antistatic agent in the core.

The mixing ratio of the antistatic agent or the polymer containing the same depends on the performance of the antistatic agent.
For example, when a copolymer of a polyalkylene glycol and a polyester having an average molecular weight of 1800 to 8500 is used as an antistatic agent, the mixing ratio of the polyalkylene glycol is substantially in the range of 5 to 60% by weight of the fineness yarn. An effective woven or knitted fabric can be obtained.

Further, the mixed fiber of the present invention has a fiber weight of 0.1 to 0.1% in order to impart good antibacterial properties to the woven or knitted fabric.
It is necessary to contain 5.0% by weight of the antibacterial agent, and it is particularly preferable that all the single yarns constituting the mixed fiber contain the antibacterial agent. 0.1% by weight of antibacterial agent
If it is less than 5, good antibacterial properties cannot be obtained, and if the content of the antibacterial agent exceeds 5% by weight, yarn breakage occurs frequently during spinning and drawing, and the operability deteriorates.

The components of the antibacterial agent are not particularly limited, but inorganic antibacterial agents exhibiting good antibacterial properties with few problems in production such as heat resistance are particularly effective, and the main component is silver. Particularly preferred are zeolites, silver zirconium phosphate, calcium silver phosphate, zinc oxide and titanium oxide.

Although the cross-sectional shapes of the fine and fine yarns constituting the mixed fineness yarn of the present invention are not particularly limited, in order to achieve the object of the present invention most effectively, Preferably, the yarn has a round cross section. If the cross section is irregularly shaped, sheath cracking may occur in the subsequent processing step, or the antistatic polymer in the core may be exposed on the surface or disappear by alkali reduction processing or the like.

The fine fine yarn coexisting with the thick fine yarn may have a round cross section, but if part or all of the fine fine yarn has a modified cross section, the dry feeling and the soft feeling are improved. Further, as can be said for both fine and fine yarns, if the single yarn cross-sectional shape is changed to two or three types, a woven or knitted fabric exhibiting an extremely good texture can be obtained.

As the polymer forming the mixed fiber of different fineness of the present invention, polyester, polyamide and the like are preferably used, but polyester is suitable for further improving the feeling by alkali weight reduction processing. Examples of the polyester include polyalkylene terephthalate and polyalkylene naphthalate, and specifically, polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) are preferable. Further, the copolymer may contain a small amount of a copolymer component. Examples of the copolymer component include aromatic dicarboxylic acid components such as 5-sodium sulfoisophthalic acid, isophthalic acid, phthalic anhydride, and naphthalenedicarboxylic acid, adipic acid, and sebacine. Aliphatic dicarboxylic acid component such as acid, diethylene glycol, propylene glycol, 1,4-
Glycol components such as cyclohexanedimethanol and alkylene oxide adducts of bisphenol S, and hydroxycarboxylic acid components such as 4-hydroxybenzoic acid and ε-caprolactone.

Next, a description will be given of an example of a method for producing the mixed fineness yarn of the present invention.

The mixed fineness yarn of the present invention can be produced by a usual melt spinning method. The method of compounding the antibacterial agent into the fiber may be a method of polymerizing the raw material polymer, or a method of adding the polymer at the time of melting the polymer in the spinning process and uniformly kneading and dispersing. Above all, a method of instantaneous mixing at the stage of spinning is preferable for suppressing side reactions. For example, a method of mixing using a static mixer immediately before discharge from a spinneret is suitably employed.

As a method for obtaining the mixed fineness yarn of the present invention, the yarns constituting the mixed fineness yarn are discharged from the same spinneret or separate spinnerets, and are combined at the time of winding to form the mixed fineness mixed yarn. A method of forming a yarn is preferably employed. FIG.
In the case of discharging from the same spinneret as in (A) and (B), it is easy to use three or more different fineness mixed fibers having different fineness and shape.

Next, an example of a method for obtaining a thick fine yarn constituting one of the mixed fineness fibers of the present invention will be described with reference to a schematic diagram of a spinneret pack shown in FIG. Separately, the polymer P1 containing the supplied antibacterial agent and the supplied antistatic agent or the polymer P2 containing the same are supplied to the introduction plate 1. Next, a part of the polymer P1 becomes a sheath from the orifice 7 through the polymer introduction holes 5A, 5B, and 5C formed in the introduction plate 1, the mixing plate 2, and the needle plate 3, and the polymer diffusion region 6 of the spinneret 4. Is discharged.

On the other hand, the entire amount of the antistatic agent or the polymer P2 containing the same flows into the polymer introduction hole 9 of the introduction plate 1, and a part of the polymer P1 also flowing from the polymer introduction hole 10 is cut into the mixing plate 2. While forming a composite flow in the groove 14, the mixture flows into the static mixer 11 embedded in the mixing plate 2 and is mixed.

Antistatic agent or polymer P containing the same
2 and a part of the polymer P1 containing the antibacterial agent are mixed in the polymer diffusion region 12 of the needle plate 3,
After passing through 13, it is discharged as a core from the orifice 7, and is then stretched to obtain a yarn (thickness fine yarn) containing an antistatic agent in the core.

FIG. 4 shows an example of an apparatus used for spinning and drawing as described above.
The undrawn yarn of different fineness mixed fiber discharged from 41 is drawn by the first roller 42, subsequently drawn between the heated first roller 42 and the second roller 43, and then wound by the winder 44. Can be

[0030]

The mixed-filament yarn of the present invention is a fiber containing 20% by weight or more of fine denier yarn having a single yarn fineness of 2.5 denier or more and 5% by weight or more of fine denier yarn of 1.5 denier or less. In this case, excellent dry feeling and swelling feeling can be given, and the antistatic effect necessary for practical use can be obtained because the antistatic agent is contained in the core of the thick fine yarn. Furthermore, since an antibacterial agent is blended in the mixed fineness yarn, good antibacterial properties are imparted to the woven or knitted fabric.

[0031]

Next, the present invention will be described specifically with reference to examples. The measured values of the characteristic values in the examples are as follows. (A) Intrinsic viscosity [η] It was determined from a value measured at a temperature of 20 ° C. using an equal weight mixture of phenol and ethane tetrachloride as a solvent. (B) Evaluation of antibacterial properties (unified test method) Antibacterial properties were evaluated according to the unified test method of the Textile Sanitary Processing Council (SEK).

After sterilization, the specimen (0.4 g of a square test piece of about 18 mm) dried in a clean bench was subjected to high-pressure steam sterilization and ice-cooled nutrient broth having a concentration of 1/20 in ice-cooling to obtain a viable cell count of 1 ± 0. 0.2 ml of test bacterial suspension adjusted to 3 × 10 ⁵ cells / ml
Is inoculated so as to uniformly soak the whole sample, and a sterilized cap is tightened. This is cultured at 37 ± 1 ° C. for 1 hour, and the number of viable cells after the culture is measured. The test bacterium was Staphylococcus aureus ATCC 653.
Using 8P), a bacteriostatic activity value, which is an indicator of antibacterial activity, was calculated by the following method. Bacteriostatic activity value: LogB-LogC However, the test must meet the conditions (LogB-LogA)> 1.5. A: Average number of bacteria recovered immediately after inoculation of standard cloth B: Average number of bacteria recovered after 18 hours of cultivation of standard cloth C: Average value of number of bacteria recovered after 18 hours of cultivation of processed cloth Used those specified in the processing effect evaluation test manual for antibacterial and deodorized products. Those having a bacteriostatic activity value of 2.2 or more were judged to have antibacterial activity. (C) Evaluation of antistatic property A tubular knitted fabric having eight courses was produced by using a tubular knitting machine manufactured by Koike Machinery Co., Ltd. This is put in hot water of 60 ° C. for 10 minutes and stirred to sufficiently remove the oil agent adhering to the fiber surface. After that, the tube is sufficiently dried to a size of 5 cm × 5 cm square. This tubular knitted fabric is allowed to stand in a room maintained at 20 ° C. × 40% RH for 8 hours or more, and then the tubular knitted fabric is fixed on a turntable of Honestometer S-5109 manufactured by Anato Shokai Co., Ltd. Then, the distance between the honest meter electrode and the tubular knitted fabric is adjusted to 15 mm on the power receiving side and to 20 mm on the discharging side. afterwards,
A voltage of 10 kV was applied to the knitted fabric for 30 seconds, and a time required until the voltage became 1/2 (5 kV) of the initially applied voltage was measured, and this value was defined as a half-life (second). The antistatic property was determined to have an antistatic effect when the half-life was 20 seconds or less. (D) Evaluation of texture A 32 gauge circular knitted fabric was produced using the obtained mixed fiber, and the knitted fabric was evaluated as follows. Dry feeling,
For four items of swelling, unevenness, and softness, ten panelists scored each out of ten points, and the average score of ten persons was calculated for each item and evaluated as follows. ：: Average score of 8 or more Δ: ６6 or more and less than 8 points ×: 未 満 Less than 6 points Out of these, only those that scored で in all items were accepted. (E) Operability When the thread was operated for 24 hours and the number of cut yarns was 2 and less than 3 times, it was evaluated as ○, and when it was 3 times or more, it was evaluated as ×, and only ○ was evaluated as passed.

Example 1 As shown in FIG. 2 (A), the orifice has 24 holes (of which the diameter is
A spinneret having four holes 31 of 0.4 mm and four holes 33 of 0.2 mm in diameter) was prepared (the diameter of the hole 32 of the remaining orifice was 0.3 mm). Using this spinneret and the spinneret pack shown in FIG. 3, 12 g / min of PET containing 1.225% by weight of Novalon manufactured by Toa Gosei Co., Ltd. as polymer P1 constituting a part of the sheath portion and the core portion of the single yarn. The polymer was supplied at a discharge rate, and the polymer P2 (PET containing 25% by weight of polyethylene glycol having an average molecular weight of 6000) constituting the core was supplied at a discharge rate of 2.7 g / min. At a spinning temperature of 285 ° C., as shown in FIG. Four thick fine yarns having a fine core-sheath structure and other 18 yarns including fine fine yarn were spun. In addition, the shape of the single yarn constituting the yarn was all round cross-section yarn.

The undrawn yarn spun from the spinneret pack 41 was once drawn by the first roller 42 at a spinning speed of 1400 m / min using a spin drawing apparatus as shown in FIG. The temperature of one roller 42 is set to 85 ° C., the temperature of the second roller 43 is set to 110 ° C., and the film is stretched between the first and second rollers at a magnification of 2.60, and then wound up by a winder 44 to collect a mixed fiber having a fineness of 33 denier. did.

Regarding the obtained yarns, the fineness of the single-filament yarn and the fine-filament yarn, the number of the constituent yarns, the ratio to the weight of the whole yarn,
Table 1 shows the amounts of the antibacterial agents, and the evaluation results of the antibacterial properties, the charging properties, and the feeling, and the operability.

The mixed fineness yarn of Example 1 had a single fineness of 3.5 denier, and the ratio of the fineness yarn to the total weight of the yarn was 42.4% by weight. The fineness of the fineness yarn was 1.0 denier, and the ratio of the fineness yarn to the total weight of the yarn was 12.1% by weight. The amount of the antibacterial agent was 1.0% by weight of the fiber weight.

As a result, as shown in Table 1, the antibacterial properties, the charging properties, the texture, and the operability were all good.

Further, Examples 2 to 6 and Comparative Examples 1 to 6 described later.
Table 1 also shows the results of the ten evaluations.

[0039]

[Table 1]

Example 2 As shown in FIG. 2 (B), 24 orifices (of which the diameter was
A spinneret having two holes 31 having a diameter of 0.4 mm and six holes 33 having a diameter of 0.2 mm was prepared (the diameter of the hole 32 of the remaining orifice was 0.3 mm). Using this spinneret, single yarn fineness of thick fine yarn
5.0 Denier, the ratio of fine yarn to the total weight of the yarn
The same procedure as in Example 1 was repeated except that the fineness of the fineness yarn was 1.3 denier, and the ratio of the fineness yarn to the total weight of the yarn was 7.9% by weight. Manufactured. As a result, as shown in Table 1, as in Example 1, the antibacterial properties, the charging properties, the texture, and the operability were all good. Comparative Example 1 The same procedure was performed as in Example 1 except that the single-fiber fineness of the thick fineness yarn was 2.0 denier. As a result, the single yarn fineness of the thick fine yarn is 2.
When the denier was less than 0 denier and 2.5 denier, even if the fineness yarn was 24.2% by weight and 20% by weight or more in the entire yarn, the feeling of swelling and unevenness was insufficient and the texture was deteriorated.

Comparative Example 2 The same procedure as in Example 2 was carried out except that the single yarn fineness of the thick fine yarn was set to 3.1 denier. As a result, the single yarn fineness of the thick fine yarn is 3.
Even when the denier is 1 denier and 2.5 denier or more, when the ratio of the fineness yarn to the whole yarn is less than 18.8% by weight and less than 20% by weight, the dry feeling and the swelling feeling are insufficient and the texture is deteriorated.

Comparative Examples 3 and 4 Comparative Example 3 was carried out in the same manner as in Example 1 except that the fineness of the fine yarn was 0.4 denier. In Comparative Example 4, a test was conducted in the same manner as in Example 2 except that the fineness of the single-filament yarn was 0.7 denier. In both Comparative Examples 3 and 4, the denier of the fine fine yarn was 1.5 denier or less, but the texture was deteriorated because the weight of the fine fine yarn with respect to the entire yarn was less than 5% by weight.

Examples 3 and 4, Comparative Examples 5 and 6 The amount of the antibacterial agent relative to the whole yarn was 0.5% by weight in Example 3, 4.0% by weight in Example 4, 0.05% by weight in Comparative Example 5, and 0.05% by weight. Example 6 was carried out in the same manner as in Example 1 except that the amount was 8.0% by weight.

As a result, when the compounding amount of the antibacterial agent was in the range of 0.1 to 5.0% by weight as in Examples 3 and 4, good results were obtained as in Example 1. However, when the compounding amount of the antibacterial agent is less than 0.1% by weight as in Comparative Example 5, no antibacterial property is exhibited, and as in Comparative Example 6, the compounding amount of the antibacterial agent is reduced.
When the content exceeds 5.0% by weight, the operability and texture deteriorated.

Examples 5 to 6 and Comparative Examples 7 to 8 The amounts of the antibacterial agent relative to the entire yarn were 0.5% by weight in Example 5, 4.0% by weight in Example 6, and 0.05% by weight in Comparative Example 7 and Comparative Example 7. Example 8 was carried out in the same manner as in Example 2 except that the amount was 8.0% by weight.

As a result, when the compounding amount of the antibacterial agent was in the range of 0.1 to 5.0% by weight as in Examples 5 to 6, the same good results as in Example 2 were obtained. However, when the compounding amount of the antibacterial agent is less than 0.1% by weight as in Comparative Example 7, no antibacterial property is exhibited, and when the compounding amount exceeds 5.0% by weight as in Comparative Example 8, the operability and texture are deteriorated. It got worse.

Comparative Examples 9 and 10 In both Comparative Examples 9 and 10, ordinary PET having no antistatic property was used as the core component of the thick fine yarn. Comparative Example 9 was similar to Example 1, and Comparative Example 10 was similar to Example 1. A test was performed in the same manner as in Example 2. As a result, the half-life, which is an indicator of antistatic properties, is 53
In seconds and 66 seconds, there was no antistatic property at all.

[0048]

According to the present invention, the mixed fineness yarn of the present invention provides a refreshing dry feeling and a lightness due to a rich swelling, which are insufficient for conventional synthetic fibers, in a woven or knitted fabric by the mixed large fineness yarn and fine fineness yarn. It can be applied, and the anti-static agent is contained in the core of the large fineness yarn, so it has an anti-static function of static electricity generated under low humidity etc., so it can be worn comfortably even in high summer or under low humidity A woven or knitted fabric that gives a feeling. Furthermore, since the mixed fiber contains an antibacterial agent, a good antibacterial property is obtained, and a woven or knitted fabric that can suppress sweat, spills of foods, and propagation of various germs due to high humidity can be obtained. Becomes possible.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a single yarn cross section of a large fineness yarn constituting one of the mixed fineness yarns of the present invention.

FIGS. 2A and 2B are plan views showing examples of a spinneret used for spinning a mixed fineness yarn of the present invention.

FIG. 3 is a schematic explanatory view showing an example of a spinneret pack used for spinning the mixed fineness yarn of the present invention.

FIG. 4 is a schematic view showing an example of a spinning and stretching apparatus used for producing a mixed fiber of different fineness according to the present invention.

[Explanation of symbols]

 P1 Polymer containing antimicrobial agent P2 Polymer containing antistatic agent 1 Introduction plate 2 Mixing plate 3 Needle plate 4 Mixing die 5A Polymer introduction hole of introduction plate 5B Introduction hole of mixing plate 5C Introduction hole of needle plate 6 Spinneret 7 Polymer orifice 7 Thickness orifice 8 Other orifice 9 Polymer P2 polymer introduction hole 10 Polymer P1 polymer introduction hole 11 Stationary mixer 12 Polymer diffusion region of needle plate 13 Needle 14 Cutting groove of mixing plate

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI D06M 5/02 G

Claims (3)

[Claims] 1. A yarn containing 20% by weight or more of a fine yarn having a single yarn fineness of 2.5 denier or more and 5% by weight or more of a fine yarn having a single yarn fineness of 1.5 denier or less, The mixed fiber of different fineness, wherein the yarn contains 0.1 to 5.0% by weight of an antibacterial agent, and at least the large fineness yarn has a core-sheath structure containing an antistatic agent only in the core. yarn. 2. The mixed fineness yarn according to claim 1, wherein the main component of the antibacterial agent is any one of silver zirconium phosphate, calcium silver phosphate, silver zeolite, zinc oxide and titanium oxide. 3. The mixed fine yarn of claim 1 or 2, wherein the core of the thick fine yarn is a polyester containing 10 to 50% by weight of a polyalkylene glycol as an antistatic agent.