JPH0684561B2 - Antibacterial socks - Google Patents

Description

TECHNICAL FIELD The present invention relates to socks having excellent antibacterial properties.

(Prior Art) Polyester and / or polyamide fibers are widely used in uniforms, sports clothing, interiors, socks and the like.

On the other hand, there are various fungi and molds in our living environment, which adhere to the human body and fibers through mediators and propagate, causing skin disorders, and causing deterioration and deterioration of fibers. Or, it gives off a bad smell and causes discomfort. Especially in socks, the above phenomenon is remarkable.

As an antibacterial treatment for socks, a method of adhering a chemical agent such as a silicon-based quaternary ammonium salt, chlorhexidine, or an alkylamine derivative to a cotton thread is used today.

However, this method has some drawbacks. One of them is durability. As it is clear from the usage situation, socks have a very strong abrasion force, so cotton threads are easily worn,
Therefore, the attached drug is likely to fall off within a short time. Therefore, the durability of antibacterial performance is poor. The second drawback is that since the chemical adheres relatively strongly only to cotton threads, socks using the chemical are limited to cotton threads, and are applied to wool socks for winter, for example. There is a drawback that you cannot do it. Similarly, synthetic fiber
It cannot be applied to 100% used stockings. The third drawback is that in socks, the part where odor is generated is
Since the toes, soles, and heels are the main parts, the sites that are truly required to have antibacterial properties are the above sites. However, the actually produced antibacterial socks are wasteful in that the antibacterial agent adheres to other parts as well. This can, in some cases, cause problems with drug skin irritation. That is, the ankle part or the part above it is much more sensitive than the sole.

(Problems to be Solved by the Invention) An object of the present invention is to use a thermoplastic synthetic fiber which itself has elasticity and has antibacterial properties, so that it can be freely combined with any other fiber to be conventionally existing. The purpose is to easily impart antibacterial performance to all socks and to impart sufficient strength.

(Means for Solving the Problem) The present invention relates to powder of at least one metal selected from the group consisting of silver, copper and zinc or a chemical substance thereof and a melting point of 10 ° C.
It is an antibacterial sock in which a fiber made of a thermoplastic polymer in which a liquid polyester compound having a viscosity of 10 poise or more at a lower temperature of 25 ° C is dispersed is at least a part of constituent fibers. Preferably, the thermoplastic synthetic fiber is a powder of copper metal or a compound thereof and silver, zinc, aluminum,
Thermoplastic in which a mixture of powder of at least one metal selected from the group consisting of iron or its compound and a liquid polyester compound having a melting point lower than 10 ° C and a viscosity of 10 poise or higher at 25 ° C is dispersed. This is the case when the fiber is a polymer.

The mechanism of development of antibacterial properties of the thermoplastic fiber having antibacterial property in the present invention is that a minute amount of metal ion is released from the fiber and this acts as a poison to bacteria and fungi.

First, the thermoplastic fiber constituting the present invention will be described.
Examples of the thermoplastic polymer constituting the fiber include a polyester polymer having a polyethylene terephthalate or ethylene terephthalate unit as a main repeating unit, a polyester polymer having a polybutylene terephthalate or a butylene terephthalate unit as a main repeating unit, nylon-6, nylon-610, nylon. A polyamide polymer such as -66 having spinnability and preferably having a melting point of 200 ° C or higher.

At least one selected from the group consisting of silver, copper and zinc added to impart antibacterial properties to these polymers.
Copper is the best metal of choice. The decomposition temperature, melting temperature, and boiling temperature of metal compounds are all 10
Compounds that are solid at 0 ° C. or higher and at 25 ° C. and 1 atmosphere are preferable, and specifically, oxygen oxides and chlorides of the above metals,
Examples thereof include thiocyanide. Whether it is a metal powder or a 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 hard to come out on the fiber surface, and sufficient antibacterial property cannot be obtained. In order to help the metal ions come out on the surface of the fiber, in the present invention, the melting point is
A liquid polyester compound having a viscosity of 10 poise or more at 25 ° C. lower than 10 ° C. is used together. Examples of such a compound include polyester-based plasticizers marketed as ADK CIZER series manufactured by ADEKA A-Gas Co., Ltd. and polyester-based plasticizers marketed as POLY CIZER series manufactured by Dainippon Ink and Chemicals, Inc. . Specifically, a compound obtained by polycondensing a dicarboxylic acid such as adipic acid, sebacic acid, or phthalic acid with a glycol as an acid component can be used.

The weight ratio of the metal or the compound thereof in the thermoplastic fiber is preferably 0.1 to 10% by weight, and the ratio of the liquid polyester compound is also 0.
1 to 10% by weight is preferred.

More preferably, copper or a copper compound is selected as the metal or metal compound, and it is used in combination with the liquid polyester compound, and at least one metal or compound thereof selected from silver, zinc, aluminum and iron is used. is there. By doing so, the antibacterial property is further enhanced. In this case, the ratio of copper or a copper compound and at least one metal selected from silver, zinc, aluminum and iron or a compound thereof is preferably 1:99 to 99: 1 by weight. The total amount of the above metals or metal compounds preferably does not exceed 10% by weight in the thermoplastic fiber.

Such an antibacterial fiber is subjected to wooly processing, if necessary. This kind of antibacterial fiber exhibits antibacterial properties by containing the antibacterial component inside and bleeding properly on the fiber surface, so it is resistant to abrasion and has improved durability when compared to the drug-treated socks. Can be made.
Also, since it is a thermoplastic fiber, it is possible to have sufficient elasticity required for socks by performing Woolly processing,
Cotton, linen, wool, acrylic, nylon, polyester,
It can be freely combined with other fibers to give socks antibacterial properties and elasticity. It also makes it possible to impart an antibacterial property to a very wide range of socks, as compared with the case where the method of applying an antibacterial agent is limited to cotton yarn.

Furthermore, this type of thermoplastic fiber makes it possible to easily produce fine threads. For example, a thin denier of 20 denier is possible. With spun yarn, fine yarns up to this point are not possible. By using such a thin thread, it can be used at any desired site without impairing the appearance of socks.

Specifically, the spun yarn or filament yarn combined with the above-mentioned antibacterial fiber and, if necessary, other fiber is knitted into socks together with other yarn, if necessary. At that time, the antibacterial fiber may be knitted on a part of the sock or may be knitted on the entire surface. The proportion of the antibacterial fiber in the whole socks is not particularly limited, but generally 1 to 50% by weight is preferable in terms of performance and economy.

As described above, the sock of the present invention has excellent durability, antibacterial properties, and sufficient strength.

Hereinafter, the present invention will be specifically described with reference to examples. Evaluation of the sterilization effect and washing conditions in the examples were carried out by the following test methods.

<Measurement of bacterial sterilization rate> Performed by the AATCC method for measuring the number of bacteria, using Staphylococcus aureus FDA209P as the bacterial species used. In 37
The number of viable cells after culturing at 18 ° C. for 18 hours was measured, and the rate of decrease with respect to the number of recovered cells immediately after injection was calculated.

<Washing test method> Performed according to JIS L0217-103 method, 2 g in water 1 with a liquid temperature of 40 ° C
The laundry detergent is added and dissolved at the ratio of to make a washing liquid. The sample and the load cloth are put into this washing liquid so that the bath ratio becomes 1:30, and the operation is started. After processing for 5 minutes, the operation is stopped, the sample and the load cloth are dehydrated by a dehydrator, and then the washing liquid is replaced with fresh water at room temperature, rinsed for 2 minutes with the same bath ratio, and air dried. The above operation was repeated 10 times to obtain a measurement sample after 10HL.

Example 1 [η] = 0.65 dl / g (the intrinsic viscosity measured using a Ubbelohde viscometer in a 30 ° C. constant temperature bath using an equal volume mixed solvent of phenol and tetrachloroethane) was added by 0.5 wt% of TiO ₂ . Polyethylene terephthalate was extruded by a 40φ extruder and zinc oxide powder was added as an antibacterial powder to a molten polymer line of the polymer, and a polyester compound having a viscosity of about 100 poise (fluidity at 25 ° C., manufactured by ADEKA ARGUS CHEMICAL CO., LTD. Polyester plasticizer (trade name: PN-350) at a weight ratio of 1: 1 was thoroughly pulverized and dispersed in a vibration mill and dried in advance at 120 ° C.
% Of zinc oxide powder and 1% by weight of polyester compound, and then kneaded with a 40-element static mixer manufactured by Kenics Co., Ltd., spun from a round hole nozzle and spun. The spun raw yarn was drawn by a roller plate system under ordinary conditions to obtain a 20 denier 4 filament.

A sock was produced by using the obtained antibacterial yarn, cotton yarn No. 40, and yarn Nylon woolly yarn 60d dyed by a conventional method. The sock has a structure as shown in FIG.

That is, the antibacterial thread is used only on the toes, soles, and heels of the socks, and the other parts are not used. Each pair of 6 socks (male) was given two pairs of socks, and each pair was worn for 10 days while alternately laundering, and after wearing the socks, the socks were taken off and the presence or absence of odor was evaluated by themselves. Separately, four test subjects (male) were given the sample socks in FIG. 1 in which no antibacterial thread was used, and the same evaluation was performed. First of those results
Shown in the table. As is clear from the table, the antibacterial and deodorant effect of the antibacterial yarn is excellent.

Next, the numerical values obtained by measuring the antibacterial properties of the above 6 subjects after 10 days of wearing are added to the end of Table 1, but it is found that the antibacterial properties of the 6 subjects are excellent even after 10 days of wearing.

Example 2 A spun raw yarn was obtained in the same manner as in Example 1, drawn in a water bath at 90 ° C. to obtain a drawn yarn of single yarn denier 3dr, and then crimped by a conventional method. After cutting, cut it to a length of 51 mm and 40/1 (132 denier) by the usual spinning method.
Got the thread. A knitted fabric was created using this thread, and the antibacterial properties before and after 10 washes were measured.
It was 94.6% after washing.

Twist this thread and cotton thread 40/1 at 800 times / M, and by the usual method,
Ester and cotton were dyed (color: navy).

A sock as shown in FIG. 2 was prepared by using this dyed yarn, polyester wooly yarn 75d and separately dyed cotton yarn # 60 twin yarn. The wearing test by several people of this sock was the first in Example 1.
It was almost the same as in the table, and the odor was slightly or very little and was good.

Further, when the washing durability of this sock was evaluated, it was as shown in Table 2 and was good.

Example 3 The same as in Example 1 except that the total amount of the zinc oxide powder used in the production of the antibacterial yarn was replaced with a mixed powder (average particle diameter of 5 μm or less) made of metallic copper and metallic silver 9: 1 (weight ratio). Then, the antibacterial yarn was obtained, and the same procedure as in Example 1 was performed to obtain a sock as shown in FIG. When the wearing test of this sock was carried out in the same manner as in Example 1, the wearing evaluation was superior to that in Example 1, and the sterilization rate after 10 days of wearing was 74.9% on average for 6 people, and Example. The average value of 1 was 66.8%, which is considerably superior.

[Brief description of drawings]

1 and 2 are front views showing an example of the sock of the present invention.

Claims (1)

[Claims] 1. A powder of at least one metal selected from the group consisting of silver, copper and zinc or a compound thereof and having a melting point of 10.
An antibacterial sock in which a fiber made of a thermoplastic polymer in which a liquid polyester compound having a viscosity of 10 poise or more at 25 ° C. lower than 25 ° C. is dispersed is at least a part of constituent fibers.