JPH02175901A - Antimicrobial sock - Google Patents

Abstract

PURPOSE:To obtain antimicrobial socks having excellent antimicrobial activity, providing sufficient strength, comprising yarn containing thermoplastic polymer fiber having dispersed powder of a metal such as silver a compound thereof and a liquid polyester compound having a specific viscosity in the interior. CONSTITUTION:The aimed antimicrobial socks using a combination of yarn comprising 1-50wt.% fiber of (A) 0.1-10wt.% powder of at least one metal selected from a group consisting of silver, copper and zinc or of a metal thereof and (B) 0.1-10wt.% liquid polyester compound polymer (e.g. nylon-6) having <=10 deg.C melting point and >=10 poise viscosity at 25 deg.C and (C) another fiber (e.g. cotton) at the bottom, readily providing conventional socks with antimicrobial activity without unpleasant feeling and deterioration phenomena of fiber and excellent durability.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to socks that have poor antibacterial properties.

BACKGROUND OF THE INVENTION Polyester and/or polyamide fibers are widely used in uniforms, sports clothing, underwear, socks, etc.

On the other hand, various bacteria and molds exist in our living environment, and they can attach to the human body and fibers through vectors and multiply, causing skin disorders and causing deterioration and deterioration of fibers. It may wake you up or cause discomfort due to bad smells. The above phenomenon is particularly noticeable in socks.

Today, as an antibacterial treatment for socks, a method is used in which chemicals such as silicone quaternary ammonium salts, chlorhexidine, and alkylamine derivatives are attached to cotton threads.

However, this method has some drawbacks. One of them is durability. As is clear from the way socks are used, the abrasive force of socks is very strong, so the cotton threads are easily worn out.
Therefore, the attached drug is likely to fall off within a short period of time. However, the durability of antibacterial performance is poor. The second drawback is that the chemical adheres relatively firmly only to the M yarn, so socks using the chemical are limited to those using cotton yarn, such as wool socks for winter. The disadvantage is that it cannot be applied to Similarly, it cannot be applied to stockings made of 100-chip synthetic fibers. The third drawback is that the odor-producing parts of socks are mainly the toes, soles, and heels, and these are also the parts where antibacterial properties are truly needed. However, the antibacterial socks that are actually made have the disadvantage that antibacterial agents adhere to other parts as well. This can, in some cases, lead to problems with drug skin irritation. This is because the ankle area and the area above it are much more sensitive than the sole of the foot.

(Problems to be Solved by the Invention) The object of the present invention is to use thermoplastic synthetic fibers that are stretchable and have antibacterial properties, and which can be freely combined with other arbitrary fibers. To easily impart antibacterial properties to all conventional socks and to impart sufficient strength.

(Means for Solving the Problems) The present invention provides powders of at least one metal selected from the group consisting of silver, copper, and zinc, or a compound thereof, and a melting point of 10.
This is an antibacterial sock in which at least a part of the constituent fibers are fibers made of a thermoplastic polymer in which a liquid polyester compound having a viscosity of 10 poise or more at 25° C. or lower is dispersed. Preferably, the thermoplastic synthetic fiber has a melting point of at least 1 m above the powder of a copper metal or a compound selected from the group consisting of silver, zinc, aluminum, and iron. low 2
This is the case when the fiber is made of a thermoplastic polymer in which a mixture with a liquid polyester compound having a viscosity of 10 voices or more at 5° C. is dispersed.

The mechanism by which the antibacterial properties of the antibacterial thermoplastic fibers of the present invention are developed is that trace amounts of metal ions are released into the fibers, and these act as poisons against bacteria and fungi.

First, the thermoplastic fibers constituting the present invention will be explained.

The thermoplastic polymers constituting the fibers include polyester polyphene whose main repeating unit is polyethylene terephthalate or ethylene terephthalate units, polyester polymer whose main repeating unit is polybutylene terephthalate or butylene terephthalate units, nylon-6, nylon-6101. It is a polyamide polymer such as nylon-66, which has spinnability and preferably has a melting point of 200° C. or higher.

Copper is the most preferable metal selected from the group consisting of 1M silver and zinc that is added to impart antibacterial properties to these polymers. In addition, as a metal compound, the decomposition temperature, melting temperature, and boiling temperature are all 10
Preferably, the compound is solid at 0° C. or higher and at 25° C. and 1 atmosphere.

Specific examples include oxygen oxide % chlorides and thiocyanides of the above metals. Whether it is metal powder or metal compound powder, the average particle size is preferably 5 μm or less.

If such a metal or metal compound is simply kneaded into the polymer, metal ions are unlikely to come out on the fiber surface and sufficient antibacterial properties cannot be obtained.

To help metal ions come out to the fiber surface,
In the present invention, a liquid polyester compound having a melting point lower than 10°C and a viscosity of 10 poise or higher at 25°C is used in combination. Examples of such compounds include polyester plasticizers commercially available as the ADK CIZER series manufactured by Adeka Argus Co., Ltd. and polyester plasticizers (manufactured by Dainippon Ink Kaji Co., Ltd.).
Examples include polyester plasticizers commercially available as the 'OLY CIZER series. in particular,
Examples of the acid component include compounds obtained by polycondensing dicarboxylic acids such as adipic acid, sebacic acid, and phthalic acid with glycol.

The weight proportion of the metal or its compound in the thermoplastic fiber is preferably 0.1 to 10 TL, and the proportion of the 1-fold polyester compound is the same <0.1 to 10 weight %. is preferred.

More preferably, copper or a copper compound is selected as the metal or metal compound, and the i-shaped polyester compound is used in combination with the metal, and at least lal metal selected from silver, zinc, aluminum, and iron or a compound thereof is further preferably used. be. By doing so, the antibacterial properties are further enhanced. In this case Gero steel or copper compound and silver,
The weight ratio of at least one metal selected from zinc, aluminum, and iron or a compound thereof is 1:99 to 1:99.
99:1 is preferred. Preferably, the total amount of the metal or metal compound does not exceed 10% by weight in the thermoplastic fiber.

Coolie processing is applied to such antibacterial fibers as necessary. This type of antibacterial fiber exhibits antibacterial properties by encapsulating antibacterial components inside and bridging onto the surface of the fibers, so it is resistant to abrasion and is more durable than socks with the above-mentioned amount of chemical treatment. can be improved. In addition, by applying Kume, a thermoplastic fiber, to Coolie processing, it has the elasticity necessary for socks. To last long enough, cotton,
It can be freely combined with linen, cool, acrylic, nylon, polyester, and other fibers to give socks antibacterial properties and elasticity. Method 1 is to apply an antibacterial agent.
It also makes it possible to impart antibacterial properties to a significantly wider range of socks compared to those limited to just four threads.

Furthermore, this thermoplastic fiber of wood can be easily made into thin threads. For example, a thin one of 20 denier is possible. With normal spun yarn, it is impossible to create yarns this thin. By using such thin threads, the casing can be applied to any desired area without damaging the appearance of the sock.

Specifically, the above-mentioned antibacterial fibers and, if necessary, other fibers are used to knit the sock into a sock by using a spun yarn or a filament yarn (if necessary) in combination with other yarns. In this case, the antibacterial fibers may be woven into a part of the sock or the entire surface of the sock. The proportion of antibacterial fibers in the whole sock is not particularly limited, but generally 1 to 50% by weight is preferred in terms of performance and economy.

As described above, the socks of the present invention have excellent antibacterial properties and sufficient strength.

Hereinafter, the present invention will be specifically explained with reference to practical examples. The evaluation of the bactericidal effect and the washing conditions in the practical example were conducted according to the following test method.

Measurement of bacteria sterilization rate〉 According to the AATCC bacterial count method, the actual and fecal bacteria species were 2% (5 taphyl*coccus au
reus F'DA2U9P) using Mezono test 1=li
A bouillon suspension of the test bacteria was pressurized to
The number of viable bacteria was measured after culturing at 18 hours at °C, and the rate of decrease with respect to the amount n recovered immediately after Ebetsu was determined.

Washing test method> According to JIS L0217-103 method, the actual washing test method was carried out at a liquid temperature of 40
Laundry detergent is added at a ratio of 2 f to 1 t of water at ℃ and dissolved to obtain a washing liquid. The sample and load cloth are put into this washing liquid so that the bath ratio is 1:30, and the operation is started. After processing for 5 minutes, stop the operation, dehydrate the sample and loaded cloth in a dehydrator, then replace the washing solution with fresh water at room temperature and wash with the same bath ratio.
Rinse for a minute and air dry. The above operation was repeated 10 times to obtain a measurement sample after 10HL.

Practical Example 1 [η) = 0.65 dllf (Intrinsic viscosity of Ti measured using a coupe rope viscometer in a constant temperature bath at 30°C using an equal volume mixed solvent of phenol and tetrachloroethane)
Polyethylene terephthalate added with 0z O, 5wt '4 was extruded using a 40φ extruder, and zinc oxide powder was added as an antibacterial powder to the m-fusion polymer line of the polymer, and the mixture was heated at 25°C.
A polyester compound having a viscosity of about 100 poise (polyester plasticizer manufactured by Adekar Argus Chemical Co., Ltd.: trade name PN-350) exhibiting fluidity at a weight ratio of 1:1 is mixed,
Thoroughly crush and disperse with a vibrating mill, dry thoroughly at 120 degrees Celsius, and then use a vibrating mill to thoroughly crush and disperse the mixture.

The mixture was injected at 21 thlt% with respect to the polymer flow, that is, 1 weight of zinc oxide powder and 1 weight of polyester compound, and then
The mixed ML was mixed using an element static mixer, and the yarn was spun through a round hole nozzle. The spun yarn was rolled using a roller plate method under normal conditions to obtain 4 filaments of 20 denier.

This obtained antibacterial thread and 40 cotton threads dyed by a conventional method
Socks were made using @ double yarn and nylon coolie yarn 6()d. The sock has a structure as shown in FIG.

That is, the antibacterial thread is applied only to the toes, soles, and heels of the socks, but not to the other parts. Two pairs of these socks were given to each of six male subjects, who wore them for 10 days while washing them alternately.After wearing them, they took off the socks and smelled them themselves to evaluate the presence or absence of odor. 4 other subjects (male)
The same evaluation was conducted using the sample socks shown in Figure 1 in which no antibacterial yarn was used. The results are shown in Table 1. As is clear from the table, the antibacterial and deodorizing effects of the antibacterial yarn are excellent.

Next, the values obtained by measuring the antibacterial properties of the above six subjects after wearing the layer for 10 days are appended to the end of Table 1, and it can be seen that it has excellent antibacterial properties even after wearing the layer for 1°.

Below is the blank space No. 1 Evaluation of outer wear and 108 Bacterial properties after wearing (Note) ◎ No odor at all ○ Slight odor ∆ Odor × Strong odor Actual example 2 Cut yarn yarn was obtained by the same method as Example 1 in ga. hand,
This was drawn in a water bath at 90°C to obtain a drawn yarn with a single denier of 3dr, and then crimped in a conventional manner.
1! Cut to lI length and use normal spinning method to make 40
/1 (132 denier) thread.

A knitted fabric was made using this yarn, and its antibacterial properties were measured before and after washing 10 times.The antibacterial properties were 98.8% before washing and 94.6% after washing.

This thread and a 40/1 cotton thread were twisted at a rate of 800 times/M, and the ester and cotton were dyed by a conventional method (color: navy).

Using this dyed yarn, polyester woolly yarn 75d, and separately dyed cotton yarn No. 60 twin yarn, I made socks as shown in Figure 2. The wearing test of these socks by several people was almost the same as in Table 1 of Example 1, and the odor was slight or very low.
It was good.

Furthermore, when the washing durability of this sock was evaluated, it was found to be good as shown in Table 2.

Table 2 Example 3 In the above Example 1, the entire amount of zinc oxide powder used for manufacturing the antibacterial thread was placed in a mixed powder [average particle size of 5 μm or less] consisting of metallic steel and metallic silver 9:1 (weight ratio). The antibacterial yarn was obtained in the same manner as in Example 1, except for the flooding, and the socks as shown in FIG. 1 were obtained in the same manner as in Example 1. The wearing test of these socks was conducted in the same manner as in Practical Example 1, and the wearing evaluation was superior to that of Example 1, and the sterilization rate after 10 days of wearing was 74.1% on average for 6 people. This was significantly better than the average value of Example 1, 66.8%.

[Brief explanation of the drawing]

1 and 2 are straight views showing an example of the sock of the present invention. Patent applicant RiRa Shi Co., Ltd.

Claims (1)

[Claims] At least one selected from the group consisting of silver, copper and zinc
At least some of the constituent fibers are fibers made of a thermoplastic polymer in which a powder of a metal or its compound and a liquid polyester compound having a melting point lower than 10°C and a viscosity of 10 voids or more at 25°C are dispersed. Antibacterial socks.