JP2016069771A - Synthetic fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic fiber that has an excellent antifungal property and antifungal durability even without relying on the post-treatment.SOLUTION: Provided is a fiber made from an inorganic type antifungal agent supporting a metal composition on a glass, and a thermoplastic resin, and in which, characterized in: the total fineness is 200 dtex or less and the single yarn fineness is less than 6 dtex; the respective antifungal activity value for Black fungus, Black kojic fungus, Blue fungus and Ringworm fungus measured according to the following measurement condition ISO 13629-1;2012 method (light emission measurement method) is 3.3 or more; the antifungal activity value after 10 times of washing according to JIS No. L 0217,103 is 3.0 or more; and in JIS Z 2911:2010 method (a test for fiber products, wet method), the determination after 14 days is 0 (the growth of fungus is not observed).SELECTED DRAWING: None

Description

  The present invention relates to a synthetic fiber having antifungal properties.

Conventionally, many fabrics having fungicidal properties have been proposed. For example, a method of imparting antifungal properties by processing by spraying, dipping, coating, etc., a method of imparting antifungal properties by means such as a woven structure, a kneading agent, a processing using a fluorine-based coating agent For example, a method for preventing mold from being fixed by covering with a fabric.
Patent Document 1 is characterized in that a woven or knitted fabric made of polyester fibers provided with a water repellent and a spinning oil is coated with a synthetic resin such as a fluorine-based or silicone-based coating agent and heat-treated. It describes about the manufacturing method of the mesh sheet to do.
Patent Document 2 describes that an antibacterial polyester fiber can be obtained by using a specific modified cross-section fiber containing an inorganic antibacterial agent on which an antibacterial metal component, at least a part of which is a silver component, is supported. Yes.
Patent Document 3 describes an antibacterial and antifungal polyester fiber and a method for producing the same, and describes a 1450 dtex / 192f fiber containing silver-supported zeolite (particle size: 2.0 μm). This fiber has an electron microscopic observation that the number of inorganic antibacterial agent particles per unit cross-sectional area in the surface portion is 1.5 times or more the unit number of inorganic antibacterial agent particles per unit cross-sectional area in the center portion. is there.

Japanese Patent Laid-Open No. 7-11582 JP 2004-360091 A Japanese Patent No. 5437472

However, in Patent Document 1, a woven or knitted fabric made of polyester fiber and having a filling rate of 95% or less is coated with a fluorine-based or silicone-based coating agent. In the case of a new fabric, this coating resin can prevent mold from being fixed and water can be prevented from entering. Therefore, it is extremely high in mold resistance, but easily peels off after long-term use or washing. . As a result, water is absorbed from the peeled portion by capillarity between single fibers, mold may be generated, fiber performance may be deteriorated, absorbed moisture may freeze and destroy the resin. There's a problem.
The fiber described in Patent Document 2 or 3 is not sufficient in antifungal property, and is not sufficient in antifungal durability.

  Accordingly, an object of the present invention is to solve the above-described problems and to obtain a synthetic fiber excellent in antifungal property and antifungal durability, without using post-processing.

In order to achieve the above object, the present invention is a fiber composed of an inorganic fungicide having a metal component supported on glass and a thermoplastic resin, and has a total fineness of 200 dtex or less and a single yarn fineness of less than 6 dtex. The antifungal activity value against black mold according to ISO 13629-1; 2012 method (luminescence measurement method) measured under the following measurement conditions is 3.3 or more, and the antifungal activity against black mold after 10 washings of JIS L 0217,103 A synthetic fiber having a value of 3.0 or more and having a determination of 0 (no growth of mold) observed after 14 days in the JIS Z 2911: 2010 method (textile test for wet products) Is the first gist.
<Measurement Condition of Antifungal Activity Value According to ISO 13629-1; 2012 and JIS Z 2911: 2010 Method (Textile Product Test Wet Method)>
This is a value obtained by measuring and measuring a tubular knitted fabric having a number of wales of 30 / 2.54 cm and a number of courses of 60 / 2.54 cm using two synthetic fibers as twin yarns.
Moreover, let the 2nd summary that the content rate of an inorganic type antifungal agent is 0.5-5 mass% in the said synthetic fiber.
Furthermore, in the synthetic fiber, the inorganic antifungal agent has at least one of zinc or silver supported on glass, an average particle diameter of 3.5 μm or less, and a zinc content based on the agent of 15 to 25% by mass. The third gist is that the silver content is 0.1 to 3% by mass.
Moreover, let it be the 4th summary that it is 30 minutes or more when the synthetic fiber is run on the SUS line.
In addition, a fifth aspect of the above synthetic fiber is that the strength is 3 cN / dtex or more and the number of fluffs per million meters is 2 or less.
Furthermore, the step of mixing the inorganic antifungal agent master batch and the diluted resin, the step of melt spinning the mixture at a spinning draft of 10 to 150 times, the fiber obtained by melt spinning is 2.0 to 2.0 The sixth gist is to produce the synthetic fiber by a direct spinning drawing method including a step of drawing by 4.5 times.

According to the synthetic fiber of the present invention, excellent antifungal properties can be obtained without applying antifungal treatment such as dipping, coating, and coating, and the antifungal durability is also excellent.
According to the 2nd-5th summary of this invention, since it is excellent in antifungal property and antifungal durability, and it is excellent in fiber quality, it is excellent also in the post process passage property.
According to the 6th summary of this invention, the synthetic fiber of this invention can be manufactured suitably.

  Hereinafter, the present invention will be described in detail.

First, the synthetic fiber of the present invention is composed of an inorganic antifungal agent having a metal component supported on glass and a thermoplastic resin.
As a thermoplastic resin, it is not limited only to a polyester resin, The thermoplastic resin which can form a fiber can be selected. For example, examples of the polyester include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), aromatic polyester mainly composed of polyalkylene terephthalate, and aliphatic polyester polylactic acid such as polylactic acid. Furthermore, thermoplastic resins such as polyamide, polyurethane and polyolefin can also be used.

  The synthetic fiber of the present invention includes generally used additives, lubricants, matting agents, antioxidants, fluorescent whitening agents, antistatic agents, light-proofing agents and the like as long as the effects of the present invention are not impaired. It may be included.

  In the present invention, the inorganic antifungal agent uses glass as a base material and carries a metal component. Suitable metal components include zinc or silver. In the present invention, the inorganic antifungal agent preferably supports at least one of zinc and silver. More preferably, both zinc and silver are supported. The zinc content relative to the agent is preferably in the range of 15 to 25% by mass. Moreover, the range of 0.1-3 mass% is preferable, and, as for the content rate of silver with respect to an agent, More preferably, it is 0.1-1 mass%. If it is within the above range, it has sufficient antifungal properties and tends to be of good yarn quality that is less susceptible to fiber whiteness and resin degradation.

In the present invention, the inorganic antifungal agent is preferably in the form of fine particles, and the average particle size of the inorganic antifungal agent is preferably 3.5 μm or less. When it exceeds 3.5 μm, there is a risk that the pressure rises quickly due to filter clogging in the spin pack, yarn breakage frequently occurs in the drawing process, and the stability of the ballast directly under the nozzle is lowered. Moreover, when the particle diameter is large, the density at which the antifungal agent is present in the fiber is reduced, the density at the fiber surface layer is reduced, and the antifungal property may be lowered.
In addition, the average particle diameter of the fungicide is preferably 0.6 μm or more from the viewpoint that when the fungicide particles are too small, the particles aggregate and the effect of the fungus tends to vary depending on the fiber part.

  The synthetic fiber of the present invention can be obtained by combining the thermoplastic resin and an inorganic antifungal agent.

  In the synthetic fiber of the present invention, the content of the inorganic fungicide is preferably 0.5 to 5% by mass, and more preferably 1 to 3% by mass. If the content is less than 0.5% by mass, the mold may not have sufficient antifungal properties, and if it exceeds 5% by mass, a pressure increase due to filter clogging in the spin pack may occur quickly, or stretching. There is a risk of frequent thread breaks in the process and a decrease in stability of the ballast directly under the nozzle.

The synthetic fiber of the present invention has a total fineness of 200 dtex or less, preferably 150 dtex or less, more preferably 100 dtex or less. Moreover, the minimum of the total fineness is about 15 dtex from the ease of handling as a textile product. The single yarn fineness of the synthetic fiber of the present invention is less than 6 dtex, more preferably 5 dtex or less, and further preferably 3 dtex or less. Moreover, considering that there is a possibility that the yarn may be broken by stretching or the like when the particle size of the agent is close, the lower limit of the single yarn fineness is preferably 1.5 dtex or more.
When the total fineness exceeds 200 dtex, the surface area of the fiber becomes small, and the particle density of the agent arranged on the fiber surface layer is lowered, so that the mold prevention property cannot be sufficiently exhibited. Further, when the single yarn fineness is 6 dtex or more, the surface area of the fiber is reduced, so that the exposure of the fungicide to the fiber surface layer is reduced, and the antifungal property and the antifungal durability are inferior.

  The strength of the synthetic fiber of the present invention is preferably 3 cN / dtex or more. If it is less than 3 cN / dtex, the particle size of the agent contained in the fiber is large, and if the concentration is high, there is a risk of problems in subsequent processes such as yarn breakage in the weaving process and processing process.

  The fiber cross section of the synthetic fiber of the present invention is not particularly limited, and examples thereof include a round cross section, a polygonal cross section such as a triangle and a square, a hollow shape, and a flat shape.

  The number of fluffs per million meters of the synthetic fiber of the present invention is preferably 2 or less. More preferably, fluff is not included. If it is such a range, post-process passability, such as a weaving process and a process, will become favorable.

In the synthetic fiber of the present invention, it is preferable that a fungicide is disposed on the fiber surface layer in order to provide fungicide, and at least a part of the fungicide particles are exposed on the fiber surface. preferable. By adopting such an arrangement, the antifungal property becomes better.
Moreover, it is preferable that the synthetic fiber of this invention is 10 minutes or more when it is made to run on a SUS line in the SUS driving | running test mentioned later, More preferably, it is 30 minutes or more. If the disconnection time is less than 10 minutes, wrinkles, needles, pins, etc. may be scraped by the fiber surface layer agent in the subsequent process, which tends to reduce process passability such as weaving and false twisting processes and false twisting processes. There is.

The antifungal activity value (ISO 13629-1; 2012 method (luminescence measurement method)) of the synthetic fiber of the present invention is 3.3 or more, more preferably 3.5 or more.
Further, the antifungal activity value after washing (JIS L 0217, 103) 10 times is 3.0 or more.
Generally, when the antifungal activity value is 2.0 or more, it is said that the antifungal property is present, but the synthetic fiber of the present invention is 3.3 or more, and the antifungal activity value after 10 washings Is 3.0 or more.
By setting it as such a range, even when other textiles are mixed and a textile product is manufactured, what was excellent in mold prevention property can be obtained.
The antifungal activity value of the present invention is a value measured by the method described later for black mold. Moreover, even when targeting Aspergillus niger, blue mold and ringworm, it is preferable that the antifungal activity value is satisfied.

  Furthermore, the synthetic fiber of the present invention was found to have a fungus growth of 0 after 14 days in the fungus resistance test of JIS Z 2911: 2010 (using a mixed spore solution of black mold, black mold, blue mold, ringworm fungus). It is not possible. If the growth is recognized as 1 or 2, the fungus and fungus grow to form a colony, so that it is inferior in mold resistance, such as when used for a curtain or the like.

  The synthetic fiber of the present invention can be variously used as a fiber structure made of a fabric such as a woven fabric, a knitted fabric, or a nonwoven fabric.

  The fabric using the synthetic fiber of the present invention may use 100% of the synthetic fiber, or may be used for at least a part thereof, and may be adapted to the intended use. From the viewpoint of providing good antifungal properties, it is preferable to use 25% or more, and more preferably 50% or more.

  In addition, the fabric using the synthetic fiber of the present invention has an antifungal activity value (ISO 13629-1; 2012 method (luminescence measurement method)) of 2.0 or more and an anti-fungal property after 10 washings of JIS L 0217,103. The synthetic fiber of the present invention is preferably used so that the mold activity value is 2.0 or more.

Next, the suitable manufacturing method of the synthetic fiber of this invention is demonstrated concretely.
The following is an example of a method for producing a synthetic fiber using a polyethylene terephthalate master batch to which an antifungal agent is added and a polyethylene terephthalate resin.

First, as a polyethylene terephthalate master batch to which an antifungal agent is added, a polyester resin containing 10 to 20% by mass of the inorganic antifungal agent having the above average particle diameter and a polyethylene terephthalate resin as a dilution resin are prepared.
These resins are mixed by dry blending, melted, and discharged from a spinneret. Subsequently, after cooling the yarn and applying the oil agent, the undrawn yarn is once wound around the wound body. Thereafter, the undrawn yarn wound around the wound body is drawn out, drawn, and then heat treated to wind up the wound body to obtain the synthetic fiber of the present invention.

  The spinning draft is preferably 10 to 150, more preferably 30 to 90. When the spinning draft is less than 10, the draw ratio becomes high in the drawing process, and the deformation amount of the fiber becomes high. Along with this, there is a possibility that the agent inhibits deformation and causes thread breakage. Furthermore, when the spinning draft exceeds 180, the deformation speed of the yarn immediately under the nozzle is very fast, and the movement of the contained agent cannot catch up, causing yarn breakage and reducing spinning operability. It may be a factor. Therefore, the nozzle hole diameter and spinning speed should be selected so that a suitable spinning draft is obtained.

  The spinning temperature (temperature discharged from the spinneret) is, for example, preferably 270 to 300 ° C., more preferably 280 to 295 ° C.

  The spinning speed (the speed at which the undrawn yarn is wound up) is, for example, preferably 600 to 3500 m / min, and more preferably 800 to 1800 m / min.

  The stretching speed is preferably, for example, 500 to 1200 m / min, and more preferably 600 to 1000 m / min.

  As heat processing temperature in an extending process, 100-180 degreeC is preferable, for example, More preferably, it is 120-160 degreeC.

  As a draw ratio, DR is preferably 2.0 to 4.5, and more preferably DR is 3.0 to 4.0. When DR exceeds 4.5, the amount of deformation of the fiber increases. Along with this, there is a possibility that the agent inhibits deformation and causes thread breakage. Furthermore, when DR is less than 2.0, it is necessary to increase the spinning draft, and the deformation speed of the yarn immediately under the nozzle is very fast. This may cause a decrease in spinning operability.

The above method exemplifies a method (conventional method) in which an unstretched yarn is wound once and then stretched. However, the unstretched yarn is stretched without being wound once, and after being heat-treated (direct stretching method). Thus, the synthetic fiber of the present invention may be manufactured.
In this case, the winding speed is preferably 3000 to 4500 m / min, and more preferably 3000 to 4000 m / min.

  The synthetic fiber of the present invention may be in any form such as undrawn yarn, semi-drawn yarn (highly oriented undrawn yarn), drawn yarn and the like.

  In the manufacturing method described above, a method for obtaining a drawn yarn was exemplified. However, in the case of obtaining a highly oriented undrawn yarn, the resin is melted and discharged, cooled, and an oil agent is applied in the same manner as the conventional method described above. After that, it is guided to the first goded roll, and then it can be obtained by winding a highly oriented semi-drawn yarn around the wound yarn through the second goded roller having the same speed as the first goded roll. Each goded roll is preferably about 3000 to 4500 m / min at a constant speed, and more preferably 3000 to 4000 m / min.

  Hereinafter, the present invention will be described in detail with reference to examples. In addition, this invention is not limited to the Example described below. In addition, the measuring method in an Example and a comparative example is as follows.

A. Breaking strength and breaking elongation Measured according to JIS-L-1013 using an AGS-1KNG autograph tensile tester manufactured by Shimadzu Corporation under the conditions of a sample yarn length of 20 cm and a constant speed tensile speed of 20 cm / min. The value obtained by dividing the maximum value of the load on the load-elongation curve by the fineness is defined as the breaking strength (cN / dtex), and the elongation at that time is defined as the breaking elongation (%).

B. Average particle diameter Photographed using a transmission electron microscope (transmission electron microscope JEM-1230 manufactured by JEOL Ltd.), and an automatic image processing device (LUZEX AP (manufactured by Nireco)) Measurements were made and the specific gravity was calculated to determine the weight average particle size.

C. Spinning operability was evaluated as “good”, “slightly bad” as △, and bad as “x”.

D. Stainless fiber abrasion cutting test (SUS running test)
The evaluation fiber is run at a yarn speed of 150 m / min perpendicular to a stainless wire (SUS315) having a wire diameter of 35 μm to which a load of 10 g is applied. At this time, since the wire is worn by rubbing the evaluation fiber and the stainless steel wire, the time until cutting is measured.
The longer the time required for cutting, the better the process passability of the spinning and drawing process and the subsequent post-processing process. Therefore, the time until cutting shown below was evaluated. If the time until cutting is more than Δ, there is usually no problem.
When the cutting time was less than 10 min, ×, when it was less than 10-30 min, Δ, and when it was not disconnected for 30 min or more, ◯.

E. The number of fluff was run on a fluff detector (made by Kasuga Denki) for 100,000 m at a yarn speed of 400 m / min, and converted to the number of fluff per million m to obtain the number of fluff. The number of fluff was measured using a fluff detector counter.

F. Mold resistance test Fabric for mold resistance test of synthetic fiber was produced as follows.
A cylindrical knitted fabric having two knitted yarns of synthetic fibers and a number of wales of 30 / 2.54 cm and a number of courses of 60 / 2.54 cm was prepared as a comparative sample (A). As the reference sample, the same sample as the comparative sample (B) was prepared except that it did not contain the mold and antibacterial components. As a pretreatment method for these fabrics, it is opened, washed with hot water (60 ° C for 1 minute), dehydrated and dried (usually polyester set temperature of 190 ° C, 1 minute 35 seconds, set so that the tubular knitting is flattened) The dough was used as the original fabric.
The fungus resistance test is performed by the following method, and the antifungal activity value by ISO 13629-1; 2012 method (luminescence measurement method) and the determination after 14 days by JIS Z 2911: 2010 method (textile product test wet method) are obtained. It was.
<Antifungal activity value>
As for the raw fabric, according to ISO 13629-1; 2012 method (luminescence measurement method) Activity values were determined. Next, based on JIS L 0217,103, industrial washing was performed 10 times, and the antifungal activity value was similarly obtained by the ISO 13629-1; 2012 method to obtain the antifungal activity value after washing.
<Decision after 14 days>
JIS Z 2911: 2010 method (wet method for testing of textile products) (Apergillus niger NBRC 105649, according to Aspergillus niger NBRC 1052, Acerbi: Penicillium citrium NBRC 6352, Ketamabi: Chatomium globosum 63 A mold resistance test was performed. The judgment criteria after 14 days are shown below.
0 Mycelial growth is not recognized 1 Mycelial growth is observed and the area of mycelial growth does not exceed 1/3 of the total area 2 Mycelial growth is observed and the area of mycelial growth is More than 1/3 of the total area

[Example 1]
Polyethylene terephthalate containing 0.04% by mass of titanium oxide (IV: 0.670 dl / g) and a polyethylene terephthalate masterbatch containing 20% by mass of a silver and zinc-supporting glass fungicide (Fuji Chemical: FK-43; average) A particle size of 2.0 μm, a silver content of 0.5 mass%, and a zinc content of 19 mass%) was prepared. Both resins were dried to around 20 ppm, blended with a mixer so that the fungicide concentration in the fiber was 1.0 mass%, and introduced into an extruder. These resins were discharged from a spinneret having a round discharge hole at a spinning temperature of 295 ° C. Thereafter, the PTR was taken at 1090 m / min, and a synthetic fiber having a fineness of 84 dtex / 24f was obtained under the conditions of GR1 (90 ° C.) of 1100 m / min and GR2 (135 ° C.) of 3800 m / min. Here, tension was applied between PTR-GR2, stretched between GR1 and GR2 (stretching ratio: 3.49), and heat treatment was performed with GR2, and the resultant was wound on a winder to obtain a synthetic fiber.

[Comparative Example 1]
Example 1 except that polyethylene terephthalate (ultimate viscosity IV: 0.670 dl / g) added with 0.04% by mass of titanium oxide was discharged from a spinneret having a round discharge hole at a spinning temperature of 295 ° C. Similarly, a synthetic fiber was obtained.

[Examples 2 to 6, Comparative Example 2]
A synthetic fiber was obtained in the same manner as in Example 1 except that the fungicide concentration was changed to 0.3 to 6.0% by mass.
[Example 7, Comparative Example 3]
Synthetic fibers were obtained in the same manner as in Example 3 except that the fineness was changed to 167 dtex / 48f and 450 dtex / 96f.

  Table 1 shows the physical properties of the synthetic fibers obtained from Examples 1 to 7 and Comparative Examples 1 to 3 and the results of the mold resistance test.

The synthetic fibers obtained from Examples 1 to 7 have an antifungal activity value of 3.3 or more against the black mold, an antifungal activity value after 10 washings of 3.0 or more, and mold resistance. The antifungal property against black mold was good.
In addition, the antifungal activity value of the raw fabric is 3.3 or more, and the antifungal activity value after washing is 3.0 or more, against mold, mold, and ringworm. It was excellent in nature.
Moreover, in the mold resistance test of JIS Z 2911: 2010 method (textile product test wet method), the determination was 0, and no growth of mold was observed after 14 days.
Further, the synthetic fibers obtained from Examples 1 to 3 were particularly excellent in spinning operability, fiber properties, SUS running test results, excellent post-process passability, and excellent yarn quality without fluff. .
The synthetic fiber obtained from Comparative Example 1 is a fiber that has no problem with any of the physical properties of the yarn, spinning operation, and SUS running test. However, since no anti-fungal agent was added, in each anti-fungal resistance test, There was no effect on mold and there was no mold prevention.
The synthetic fiber obtained from Comparative Example 2 having a fungicide content of 0.3% by mass of the fiber is inferior in mold resistance since the raw fabric against black mold and the antifungal activity value after washing become 3.0 or less. It was. In addition, when antifungal activity values of Aspergillus niger, Blue mold and Ringworm were measured, Kurokoji (2.0), Blue mold (2.3), Ringworm fungus (2.4), 10 times after washing 1.9), blue mold (2.0), ringworm fungus (1.9), and the antifungal property was lower than that of the Example product. Also, in the JIS Z 2911: 2010 method (textile product test wet method), it was 1 after 14 days, and some mold growth was confirmed.
The synthetic fiber obtained from Comparative Example 3 was inferior in antifungal properties because it was a raw fabric with an antifungal activity value of less than 3.3 and an antifungal activity value of less than 3.0 after washing. However, in the JIS Z 2911: 2010 method (textile product test wet method), the determination was 14 days later, and growth of mold was not confirmed. This has a total fineness of 450 dtex and a single yarn fineness of 4.3 dtex, and the surface area of the fiber is smaller with respect to the thickness of the fiber, and the density of the number of particles exposed to the fiber surface layer tends to decrease, so the anti-mold performance is reduced. I think that.

  When the shower curtain was manufactured using the synthetic fiber obtained from Examples 1-7 and Comparative Examples 1-3, an example article was evaluated by the evaluation of JIS Z 2911: 2010 method (textile product test wet method). No mold was generated even after 14 days, but mold was adhered to Comparative Example 1 by 7 days and Comparative Examples 2 and 3 by 14 days.

[Examples 8 to 10, Comparative Example 4]
Synthetic fibers were obtained in the same manner as in Example 3 except that the average particle size of the fungicide was changed to 0.6 to 8.0 μm.
The physical properties of the synthetic fibers obtained from Examples 3 and 8 to 10 and Comparative Example 4 and the results of the mold resistance test are shown in Table 2.

The synthetic fibers obtained from Examples 8 to 10 each have an antifungal activity value of 3.3 or more against the black mold, and the antifungal activity value after 10 industrial washings is 3.0. That was all. In addition, the antifungal activity value of the raw fabric is 3.3 or more, and the antifungal activity value after washing is 3.0 or more, against mold, mold, and ringworm. It was excellent in nature. In JIS Z 2911: 2010 method (textile product test wet method), the determination after 14 days was 0, and no growth of mold was observed.
As a result of the SUS running test, the fiber of Example 10 was a synthetic fiber that was particularly excellent in both yarn physical properties and spinning operability, excellent in post-process passability, and free from fuzz.
The synthetic fiber obtained from Comparative Example 4 is a raw fabric against black mold in the ISO method, and the antifungal activity value after 10 washings is as low as 2.8 and 2.5. Part of the growth of mold was observed after the day, and the antifungal property was inferior to that of the Example product. In the ISO method, the antifungal activity value of the raw fabric against black mold, blue mold and ringworm is as follows: black mold (2.9), blue mold (2.7), ringworm (2.9) and 10 times. The antifungal activity values after washing were black mushroom (2.8), blue mold (2.7) and ringworm fungus (2.7), and these also had low fungicidal properties. This is presumably because the antifungal agent has a large particle size, so that the number of particles present in the fiber is reduced and the exposure to the fiber surface layer is reduced, so that the antifungal property is lowered. In addition, the spinning operability and the stability of the ballast directly under the nozzle were poor, and in the drawing process, the yarn could not withstand deformation of the yarn, resulting in frequent breakage. Moreover, the strength of the obtained fiber was low and fluff was frequently generated, and 6.5 fibers per 1 million meters were mixed. Although there was no problem in the running test of the SUS wire, it is considered that the presence of the fungicide on the fiber surface layer is low because the particle size of the fungicide is large, and the SUS wire wear is small and the wire is not broken. .

  When the shower curtain was manufactured using the synthetic fiber obtained from Examples 8-10, in the JIS Z 2911: 2010 method (textile product test wet method), the example product was mold even if it was used for 14 days or more. However, in Comparative Example 4, mold had adhered by 14 days.

[Examples 11 to 13]
Synthetic fibers were obtained in the same manner as in Example 3 except that the spinning speed and nozzle hole diameter were changed and the spinning draft was changed from 18.2 to 94.

[Examples 14 to 16]
Synthetic fibers were obtained in the same manner as in Example 3 except that the spinning speed, nozzle hole diameter, and number of filaments were changed, the spinning draft was changed to 40 to 172.5, and the single yarn fineness was changed to 1.17 to 2.3 dtex. It was.

[Examples 17 and 18, Comparative Example 5]
The spinning speed, nozzle hole diameter, and number of filaments were changed, the spinning draft was changed to 40 to 173, the single yarn fineness was changed from 1.17 to 7.0 dtex, and the fungicide concentration in the fiber was 1.0% by mass. A synthetic fiber was obtained in the same manner as in Example 3 except for changing to.

Table 3 shows the physical properties of the synthetic fibers obtained from Examples 3, 11 to 18 and Comparative Example 5, and the results of the mold resistance test.

The synthetic fibers obtained from Examples 3 and 11 to 18 all have an antifungal activity value of 3.3 or more in black mold, and the antifungal activity value after 10 times of industrial washing is 3.0. That was all. In addition, the antifungal activity value of the raw fabric is 3.3 or more, and the antifungal activity value after washing is 3.0 or more, against mold, mold, and ringworm. It was excellent in nature. In JIS Z 2911: 2010 method (textile product test wet method), the determination after 14 days was 0, and no growth of mold was observed.
As a result of the SUS running test, Examples 3, 13, and 14 are particularly excellent synthetic fibers having excellent yarn physical properties and spinning operability, excellent post-process passability, and no fluff. It was.
The synthetic fiber obtained from Comparative Example 5 has a mold resistance of antifungal ISO 13629-1; 2012 method mold resistance test (luminescence measurement method), and has an antifungal activity value of less than 3.3, 10 times of industrial washing The later antifungal activity value was less than 3.0, and the antifungal property was poor.

  When the shower curtain was manufactured also using the synthetic fiber obtained from Example 3, 11-18, and the comparative example 5, in Example JIS Z 2911: 2010 method (textile product test wet method) evaluation, Mold was not generated even when used for 14 days or more, but in Comparative Example 5, mold had adhered by 14 days.

  Thus, by selecting an appropriate spinning draft, additive concentration and particle size of the agent, the spinning operability can be improved, and a synthetic fiber having good yarn properties can be obtained. Furthermore, by selecting an appropriate additive concentration and particle size, it is possible to prevent the SUS from being broken from the running test of the SUS wire and to improve the post-process passability such as the weaving and knitting process.

比較例品に比べて実施例品は防カビ性及び防カビ耐久性に優れていた。 [Race curtain evaluation]
Next, a tricot fabric was produced using 50% of the fibers obtained from Example 3, Comparative Example 3 and Comparative Example 5, respectively, and a lace curtain in which the synthetic fiber obtained on the entire back surface was exposed was produced. For comparison, a fabric was manufactured using 100% of the fiber of Comparative Example 1, and a lace curtain was manufactured. Table 4 shows the results of the antifungal resistance test performed on the lace curtains using each synthetic fiber.

In comparison with the comparative product, the product of the example was superior in antifungal properties and antifungal durability.

比較例品に比べて実施例品は防カビ性及び防カビ耐久性に優れていた。 [Shower curtain evaluation]
Next, a shower curtain in which all the synthetic fibers of Example 3 and Comparative Examples 3 and 5 were introduced into the warp at a mixing ratio of 50% was manufactured. Further, as a comparison object, a fabric was manufactured using 100% of the fiber of Comparative Example 1, and a shower curtain was manufactured. Table 5 shows the results of the antifungal resistance test performed on these shower curtains.

In comparison with the comparative product, the product of the example was superior in antifungal properties and antifungal durability.

  Since the synthetic fiber of the present invention is excellent in mold resistance and mold resistance, it is suitably used for curtain materials such as blind curtains, boil curtains, shower curtains, and lace curtains, textile products such as screen doors, and water. it can.

Claims (6)

A fiber composed of an inorganic antifungal agent having a metal component supported on glass and a thermoplastic resin, having a total fineness of 200 dtex or less and a single yarn fineness of less than 6 dtex, and measured under the following measurement conditions: ISO 13629- 1: Antifungal activity value against black mold according to 2012 method (luminescence measurement method) is 3.3 or more, antifungal activity value against black mold after 10 washings of JIS L 0217,103 is 3.0 or more, JIS Z 2911: A synthetic fiber characterized in that the determination after 14 days is 0 (no growth of mold is observed) in the 2010 method (textile product test wet method).
<Measurement Condition of Antifungal Activity Value According to ISO 13629-1; 2012 and JIS Z 2911: 2010 Method (Textile Product Test Wet Method)>
This is a value obtained by measuring and measuring a tubular knitted fabric having a number of wales of 30 / 2.54 cm and a number of courses of 60 / 2.54 cm using two synthetic fibers as twin yarns. The synthetic fiber according to claim 1, wherein the content of the inorganic fungicide is 0.5 to 5% by mass. The inorganic antifungal agent has at least one of zinc or silver supported on glass, an average particle size of 3.5 μm or less, a zinc content of 15 to 25% by mass, and a silver content with respect to the agent. The synthetic fiber according to claim 1 or 2, wherein the content is 0.1 to 3% by mass. The synthetic fiber according to any one of claims 1 to 3, wherein the disconnection time when the fiber is run on the SUS line is 30 minutes or more. The synthetic fiber according to any one of claims 1 to 4, wherein the strength is 3 cN / dtex or more and the number of fluffs per million m is 2 or less. Step of mixing inorganic antibacterial / antifungal agent master batch and diluted resin, step of melt spinning the mixture at a spinning draft of 10 to 150, fiber obtained by melt spinning at a draw ratio of 2.0 to 4 The method for producing a synthetic fiber according to any one of claims 1 to 5, wherein the synthetic fiber is produced by a direct spinning drawing method including a step of drawing at 5 times.