JPH02182902A - Antifungal swimming inner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to swimming innerwear such as swimming underwear or the lining of swimming clothes, which is effectively antibacterial and has excellent hygiene. This invention relates to antibacterial innerwear for swimming.

(Prior Art) Polyester and polyamide fibers are widely used in swimwear because of their excellent elasticity, strength, and water resistance.

On the other hand, various bacteria and molds live in our living environment, and they find suitable places to breed. The surface of the human body is no exception; bacteria live in areas with high humidity. Many of the diseases currently called skin disorders are thought to be caused by the abnormal proliferation of bacteria on the skin surface. In addition, these bacteria grow on clothing that is damp with sweat, causing deterioration and deterioration of the fibers, and emitting a foul odor that causes discomfort.

In swimsuits as well, bacteria and bacteria present in seawater or pool water often breed on swimsuits that are left wet for several hours after use, giving rise to unpleasant odors. However, in the prior art, since there was no method for imparting effective resistance to synthetic fibers, the above-mentioned problems could not be addressed at all.

(Problems to be Solved by the Invention) An object of the present invention is to provide an antibacterial innerwear for swimming that is excellent in antibacterial durability, has good elasticity, is safe, and has high antibacterial properties.

(Means for Solving Problem 11) That is, the present invention provides a swimming innerwear made of a knitted fabric in which at least a part of the constituent fibers is thermoplastic fibers having antibacterial properties. It consists of a thermoplastic polymer in which a powder of at least one metal selected from the group consisting of zinc or its compound and a liquid polyester compound having a melting point lower than 10°C and a viscosity of 10 poise or more at 25°C are dispersed. An antibacterial innerwear for swimming, characterized in that the thermoplastic synthetic fiber is preferably made of a powder of copper metal or a compound thereof, and at least one metal selected from the group consisting of silver, zinc, aluminum, and iron. This is the case when the fiber is made of a thermoplastic polymer in which a compound powder 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.

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

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

Thermoplastic polymers constituting the fibers include polyethylene terephthalate or polyester polymers whose main repeating units are ethylene terephthalate units, polybutylene terephthalate or polyester polymers whose main repeating units are butylene terephthalate units, nylon-6, nylon-610, nylon. -66 or the like, which has spinnability and preferably has a melting point of 200°C or higher.

Copper is the most preferred at least one metal selected from the group consisting of silver, copper 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
Compounds that are solid at 0° C. or higher and at 25° C. and 1 atmosphere are preferred, and specific examples include oxygen oxides, chlorides, and thiocyanides of the above metals. Whether it is metal powder or metal compound powder, the average particle size is 5 μm.
The following are preferred.

As mentioned above, if a metal or a metal compound is simply kneaded into a polymer, metal ions are difficult to come out on the fiber surface and sufficient antibacterial properties cannot be obtained. In order to help metal ions come out to the fiber surface, the melting point must be 10
It is preferable to use a liquid polyester compound having a viscosity of 10 voids or more at 25° C. or lower. As such a compound, for example, AD manufactured by Adeka Argus Co., Ltd.
Polyester plasticizers commercially available as the KCIZER series and PO/LYCIZ manufactured by Dainippon Ink Chemical Co., Ltd.
Examples include polyester plasticizers commercially available as the ER series.Specifically, examples include chemotactic compounds produced by polycondensing dicarboxylic acids such as adipic acid, sebacic acid, and phthalic acid with glycol as acid components.

The weight proportion of the metal or its metal compound in the thermoplastic fiber is preferably 0.1 to 10% by weight, and the proportion of the liquid polyester compound is preferably 0.1 to 10% by weight. More preferably, steel or a copper compound is selected as the metal compound, and the liquid polyester compound is used in combination with the metal compound, and at least one metal selected from silver, zinc, aluminum, and iron or a compound thereof is further preferably used. This is the case. By doing so, the antibacterial properties are further enhanced. In this case, steel or copper compound and silver,
The ratio with at least one metal selected from zinc, aluminum, and iron or its compound is 1:99 to
9921 is preferred. Preferably, the total amount of the metal or metal compound does not exceed 10% by weight in the thermoplastic fiber.

It is known that metallic copper releases extremely small amounts of copper ions due to its crystal structure, and that these extremely small amounts of copper ions have a bactericidal effect. In 1893, the botanist Naeghe+J- 1/1 child (
It is said that copper ions (1 ppm) were first discovered to kill microscopic amounts of copper ions (Kogyo Materials, Vol. 35, No. 3). It is said that by combining with the 18H group of enzymes inside the cell, it reduces the enzyme activity, stops the metabolic function of the cell, and kills the cell (Report of the National Institute of Agricultural Sciences (1966).
0): Sakae Toyota). Moreover, even though an extremely small amount of copper ions can exert an excellent sterilizing effect, it is said that even small amounts of copper ions are not very harmful to the human body. Rather, copper is a type of mineral that is indispensable for living organisms, and it has been reported that a lack of copper in the body can cause anemia and weaken bones. In other words, it is said that if there is not a small amount of copper in the body, no matter how much iron there is, the production of hemoglobin will be poor and red blood cells will have a short lifespan, resulting in anemia.

K and copper metals were selected as the most suitable materials for the purpose of the present invention because they are not very harmful to the human body due to their action of releasing trace amounts of copper ions and exhibit excellent bactericidal effects. The same thing can be said about silver and zinc. Such metal-containing thermoplastic fibers, such as polyester and nylon, have almost the same strength, elasticity, and water resistance as ordinary fibers, and therefore have excellent weaving properties. In this case, it is preferable to use existing fibers with excellent stretchability.

Specifically, the elongation recovery rate from 5% elongation is 80% at room temperature.
It is preferable to use the above-mentioned fibers excellent in elastic recovery in combination.

Examples of such fibers include yarns made by false twisting fibers such as polyester (polyethylene terephthalate) fibers, nylon fibers, and polybutylene terephthalate fibers, and elanuttomer fibers that are themselves stretchable, such as polyurethane fibers. Can be mentioned. For example, in the production of knitted fabrics, fabrics with good elasticity can be obtained by knitting using a combination of antibacterial yarn and polyester woolly yarn. Good elasticity is extremely important for swimming innerwear.

The proportion of antibacterial fibers in the fabric constituting swimming innerwear is generally 5 to 70 parts by weight.

When the amount of metal dispersed in the fibers is large, a sufficient effect can be achieved even at around 5% by weight within the above range.

When the contribution of metal is small, a range of 50 to 70% by weight is used.

The ratio of fibers with excellent elasticity is 30 to 7.
0% by weight is preferable from the viewpoints of elasticity, economy, and antibacterial properties. Furthermore, fibers other than the above-mentioned fibers having antibacterial properties and fibers other than fibers affected by stretchability may be added within a range that does not significantly impair stretchability and antibacterial properties.

FIG. 1 is a front view of an example of a swimming innerwear according to the present invention, and the fabric constituting this innerwear contains antibacterial fibers as described above.

The present invention will be specifically described below with reference to Examples.

The evaluation of the bactericidal effect and the washing conditions in the examples were carried out by the following test method.

<Measurement of bacterial sterilization rate> / Performed by the eta-flask method. The bacterial species used is Staphylococcus aureus.
s FDA 209p), add a predetermined amount of the test bacterial solution into an Erlenmeyer flask, add a measurement sample piece of 1.52 mm, and perform 8-figure shaking at 80 rpm x lhr at 25°C. After culturing and measuring the number of bacteria, the sterilization rate was calculated.

-A Sterilization rate (fishing = -X100 A; Number of bacteria per IWL in the Erlenmeyer flask after shaking B; Number of bacteria per 1 ml in the Erlenmeyer flask before shaking <Washing test method> Conducted according to JIS L0217-103 method .Liquid temperature 40
A synthetic laundry detergent is added and dissolved in a ratio of 1/2 t of water at °C to obtain a washing liquid. This washing liquid has a bath ratio of 1:3.
Insert the sample and load cloth as necessary so that the value becomes 0, and start operation. After processing for 5 minutes, stop the operation, dehydrate the sample and load cloth in a dehydrator, then replace the washing solution with fresh water at room temperature, rinse for 2 minutes at the same bath ratio, and then dehydrate. Rinse again for 2 minutes and air dry. The above operation was repeated 10 times, and a measurement sample was obtained after 10 times.

Example 1 [η) = 0.65 dll (intrinsic viscosity measured using an Uebelohde viscometer in a 30°C thermostat using an isothermal mixed solvent of phenol and tetrachloroethane)
Polyethylene terephthalate containing 0.5 Wts of 2 is extruded using a 40φ extruder, and the molten polymer line is filled with metal steel fine powder with an average particle size of 0.3 microns and a viscosity that indicates fluidity at 25°C. A polyester compound (polyester plasticizer manufactured by Adeka Argus Chemical Co., Ltd.: trade name PN-350) with a diameter of about 100 voids was mixed at a weight ratio of 1:1 and thoroughly dried at 120°C, and then mixed with the polymer stream. The mixture was injected in an amount of 2% by weight, that is, 1% by weight of the fine metal steel powder and 1% by weight of the polyester compound, and then kneaded with a 40-element static mixer manufactured by Kenix Co., Ltd. and mixed with a round hole nozzle. The material was discharged and spun. The spun yarn was drawn using a roller plate method under normal conditions to obtain a multifilament of 75 denier and 36 filaments. The knitted fabric was made and its antibacterial properties were measured before and after washing 10 times.The sterilization rate was 85.1% before washing and 982% after washing, both showing excellent antibacterial properties.

Next, using a 28-gauge nine-knit jersey machine, the 75-denier yarn and polybutylene terephthalate fiber CT920R were
A jersey knitted fabric was prepared by alternately using B150 denier and 48 filaments (manufactured by Kuraray). After relaxing and scouring this in a conventional manner, it was dried and set at 150°C for 60 seconds to form a product with a width of 170cm and a basis weight of 200F.
/ m knitted fabric was obtained.

Using this knitted fabric, briefs as shown in Figure 1 were made and worn as swimwear innerwear. As a control, commercially available swimsuit inner briefs were worn.

Tests were conducted by wearing both products while swimming in a pool or the sea, and when the product was put on and taken off while still wet in a somewhat airtight container such as a plastic bag, the control product often had an odor after a few hours. However, the antibacterial products did not produce any odor at all.

Next, using the above knitted fabric as a sample, antibacterial properties were measured using the shake flask method. The results are shown in Table.

Table 1 〈It was very good.

Table 2 As is clear from the table, the wash resistance is very good.

Furthermore, when the Japan Industrial Skin Hygiene Association conducted a safety test using this tubular knitted fabric made of 100% antibacterial yarn, it was found to be quasi-negative, indicating that there were no safety problems.

Example 2 A 25-denier 4-filament antibacterial polyester was obtained in the same manner as in Example 1.

This and nylon 66 woolly thread 70 denier 32 filament were twisted at 400 times/M, with a 28-gauge 30
The jersey is knitted using an inch circular knitting machine, and after relaxing and scouring using the usual method, it is dried and set at 150℃ for 60 seconds.
Width 150cr++ + weight 165? A knitted fabric of /m was obtained. Briefs with good elasticity were obtained using this knitted fabric. Its antibacterial properties are as shown in Table 2. Example 3 False-twisted yarn of polybutylene terephthalate in the warp yarn 50
A yarn made by twisting 24 denier filament and 25 denier 4 filament of the antibacterial yarn of Example 2 at 300 times/M was used to give a density of 73 pieces/inch, and a false twisted 75 denier 24 filament of polybutylene terephthalate was used as the weft. It was made into a plain weave at a density of 65 threads/inch. The width of the fabric immediately after weaving was 1470 mm. This was scoured and relaxed, dried, and finished set with a tenter width of 110 cm to create a finished cloth with a width of 1080 cm. This material had appropriate elasticity both vertically and horizontally, and when the same briefs as in Example 1 were made as swimsuit innerwear, it felt excellent to wear. The antibacterial properties of this product were as shown in Table 3 and were excellent.

Table 3 FIG. 1 is a front view of an example of the swimming innerwear of the present invention.

Example 4 In Example 1, except that the entire amount of zinc oxide powder used in the production of antibacterial thread was replaced with a mixed powder (average particle size of 511 m or less) consisting of metallic copper and gold PA silver 9:1 (weight ratio). An antibacterial thread was obtained in the same manner as in Example 1, and a swimming innerwear was produced in the same manner as in Example 1.

When this swimming inner wear test was carried out, as in Example 1, there was no odor at all. In addition, when antibacterial and wash resistance were examined, the results were as shown in Clothing 4 below.

Table 4 Patent applicant: Rilla Co., Ltd.

Claims (1)

[Claims] 1. In a swimming innerwear made of a knitted fabric in which at least a part of the constituent fibers is thermoplastic fibers having antibacterial properties,
The thermoplastic fiber contains a powder of at least one metal selected from the group consisting of silver, copper and zinc, and a liquid polyester compound having a melting point lower than 10°C and a viscosity of 10 voids or more at 25°C. An antibacterial innerwear for swimming comprising a thermoplastic polymer dispersed in.