JPS58149305A - Underwear and socks - 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 The present invention relates to durable antibacterial, antifungal, and deodorizing underwear and socks.

Conventionally, underwear and socks are made of synthetic fibers.

Since it lacks antibacterial and deodorizing properties, it was not considered a very desirable material from a sanitary standpoint.

The present inventors focused on these problems, and as a result of intensive study, they modified the synthetic fiber.

We succeeded in imparting these properties such as antibacterial and deodorizing properties.

In other words, this proposal is to apply a quaternary nitrogen compound having antibacterial properties to polyamide, polyester or polyacrylonitrile fibers having acidic groups of 3x10-' gram equivalent/gram or more at a rate of 3, Ox 10- per gram of said fibers. This invention relates to underwear and socks mainly made of modified fibers containing 5 gram equivalents of substituted fibers.

By adopting such a structure, the present invention is the first to successfully solve the problems of body odor and unpleasant odor peculiar to feet, which could not be solved with conventional underwear and socks made of synthetic fibers. According to the present invention, it is extremely antibacterial;
Underwear and socks with excellent deodorizing performance can be provided, and for example, underwear has an excellent effect of eliminating even armpit odor. In addition, the socks of the present invention are free from the trouble of using conventional soles containing deodorizers, and are also effective in preventing athlete's foot. Furthermore, the present invention is characterized by the persistence of such effects, particularly in its excellent washing resistance.

The polyamide used in the present invention includes, for example, nylon 6, nylon 6/6. A copolymer obtained by copolymerizing a normal polyamide-based polymer such as nylon 6/13 and K with another diamine or dicarboxylic acid component,
It is a polymer with fiber-forming properties.

Polyester refers to a copolymer made by copolymerizing ordinary polyester polymers such as polyethylene terephthalate and polybutylene terephthalate, as well as other dicarboxylic acid or glycol components, and which has fiber-forming ability. . In the case of polyacrylonitrile, it is also a polyacrylonitrile polymer similar to the above and a copolymer mainly composed of polyacrylonitrile, which has fiber-forming properties.

In the present invention, the above-mentioned polymers having acidic groups introduced therein in an amount of 3 x 10-' gram equivalents/gram or more, preferably 5.5 x 10'' gram equivalents/gram, are used.

As such acidic groups, carboxylic acids and sulfonic acids are preferable from the viewpoint of the subsequent substitution reaction treatment of the quaternary nitrogen compound.

Such acidic groups can be formed by the following compounds. Examples of the carboxylic acid groups include acrylic acid, methacrylic acid, derivatives thereof, and unsaturated aliphatic polycarboxylic acids such as itaconic acid and butenetricarboxylic acid, and sulfonic acids. As a group, styrene sulfonic acid, 2-
acrylamide-2-methyl-propanesulfonic acid,
2-7 Acrylamido-2-phenyl-ethanesulfonic acid.

Examples include allylsulfonic acid and derivatives thereof, but in short, compounds containing a carboxylic acid group or a sulfonic acid group having a functional group capable of radical polymerization are convenient.

In addition to the above, in the case of polyamide or polyester, the above-mentioned acidic group-containing compound having a functional group such as an amino group, a carboxyl group, or a hydroxyl group that can be copolymerized with these polymers may be used.

The introduction of acidic groups may be carried out by copolymerization during the polymerization stage of the above-mentioned polymer, blending at the spinning stage of the polymer, or graft polymerization onto the fibers, and any of these may be used in the present invention.

However, graft polymerization onto fibers is common because of the physical properties of the fibers and the ease of production on a quantitative scale.

Such graft polymerization methods include radiation irradiation.

A known method may be used in which the above-mentioned monomers are graft-polymerized by activation using an initiator such as ozone oxidation or peroxide.

In addition to the above methods, polyacrylonitrile fibers can be produced by
A nitrile group can be converted to a carboxyl group by heat treatment with a concentrated aqueous alkaline solution.

In any case, if the amount of acidic groups introduced or contained in the fiber is less than 3 x 10" Durham equivalents per gram of fiber, it may be replaced with a basic nitrogen compound having antibacterial properties. Also, sufficient antibacterial performance, which is the objective of the present invention, cannot be imparted.

The quaternary nitrogen compound having antibacterial properties to be substituted with such an acidic group includes a saturated or unsaturated aliphatic hydrocarbon group, an aromatic hydrocarbon group, an aromatic hydrocarbon group, or a nitrogen heterocycle of the nitrogen compound. A fourth compound consisting of a hydrocarbon group constituting , and a hydrocarbon group consisting of a combination of these groups.
Any quaternary nitrogen compound having antibacterial and antifungal properties can be applied, but among these, quaternary nitrogen compounds whose hydrocarbon groups have a total number of carbon atoms of 10 or more, preferably 15 or more are suitable for this performance. It is excellent.

A typical example of the quaternary nitrogen compound of the present invention is a quaternary ammonium salt represented by the following general formula. Here, R1-R4 are hydrocarbon groups and further have a nitrogen-containing heterocycle. In this case, R, , R4 in the above general formula is represented by R5, and the structure is as shown in the following formula.

Here, R5 is a hydrocarbon group having 2 or more carbon atoms, preferably 5 or more carbon atoms, and R5 may further include a hydrocarbon group of R4-R4. In either case, the total number of carbon atoms in all hydrocarbon groups is preferably 10 or more, particularly 15 or more, and
represents halogen, particularly preferably chlorine or bromine.

Specific examples of compounds represented by the general formula include lauryl dimethyl benzyl ammonium chloride, cetyl dimethyl benzyl ammonium bromide,
stearyl trimethyl ammonium chloride,
Examples include cetyl pyridinium chloride. Of course, R4-R4, R5 of the above compound is the total number of carbon atoms or at least 10. It goes without saying that those with appropriate substitutions, preferably in the range of 15 or more, or those in which X is replaced with chromium or bromine or vice versa, are particularly effective. However, compounds in which the total number of carbon atoms in hydrocarbon groups is less than 10, such as hexyl trino-9-ammonium chloride, have the disadvantage of poor antibacterial properties.

They may be used alone or in combination of two or more. In addition, these basic nitrogen compounds having antibacterial properties can be
3. oxla” gram equivalent or more, preferably 1.0x1
Substitute at least 0'-' gram equivalent. 5.0x10-5
If it is less than gram equivalent, the antibacterial and deodorizing properties aimed at by the present invention cannot be imparted, and i,Ox 10-
Even if the substitution exceeds the gram equivalent, the above performance will reach equilibrium and no further improvement in performance can be expected.

The underwear and socks of the present invention may be composed of the above-mentioned antibacterial and deodorizing fibers alone, but may also be made by mixing such fibers with other fibers. In addition, various methods for manufacturing underwear and socks may be used which are conventionally known.

Examples of such underwear and socks include shirts.

Foundation, tights, belly 1. pantyhose.

Examples include stockings and socks, but the invention is not limited to these, and the effects of the present invention can be achieved as long as they are worn in direct contact with the skin.

The underwear and socks of the present invention have extremely excellent antibacterial and deodorizing properties. For example, when compared to underwear made of ordinary nylon thread, there is no body odor when worn for 6 consecutive days.The product of the present invention has no odor at all. On the other hand, regular nylon underwear exhibits a strong odor, and in the case of socks, this difference becomes obvious after one day of wear. The underwear and socks of the present invention having such effects are effective against armpit odor and athlete's foot, and have an extremely wide range of applications, including socks for preventing athlete's foot and underwear for preventing skin diseases caused by similar bacteria.

The present invention will be further explained below with reference to Examples.

Example 1.2 Comparative Example 1.2.5 6.6 Nylon Staple 2.5 d x 54nnn
After knitting a 60 count single yarn consisting of acrylic acid and methacrylic into a smooth jersey jersey. Graft polymerization modification is carried out by heat-treating ammonium persulfate in the presence of an acid-containing aqueous solution.

A silk fabric into which carboxyl groups were introduced in an amount of 2.1 x 10-2 gram equivalents/gram fiber was obtained. Using this knitted fabric as underwear, the bath ratio containing stearyl dimethyl benzyl ammonium bromide 7 g/7 (Example 1) and lauryl dimethyl benzyl ammonium chloride 7 g// (Example 2) was prepared. Immerse it in an aqueous solution at a ratio of 1:30.

Treatment was carried out at 100 DEG C. for 60 minutes by gradual heating, and the carboxyl end was then substituted with quaternary ammonium.The degree of substitution was 1.5.times.10.sup.-' gram equivalents/gram (this example). The antibacterial properties of this underwear were measured based on J.Eng. S-2-2911. The results are shown in the table below.

As comparative examples, 1 smooth underwear made of ordinary nylon staples (Comparative Example 1), underwear made of natural cotton (Comparative Example 2), and underwear made of ordinary nylon and cotton blend yarn (Comparative Example 6) were used. Similar to this example, it was treated with lauryl dimethyl benzyl ammonium chloride. The resistance of these bacteria is shown in the table below.

The bacterial resistance values in the table above mean the following.

6: No bacterial (mold) growth is observed in the entire area.

2: Bacterial growth is 1/3 or less of the total area.

1: Bacterial growth exceeds 115 of the total area.

The washing method is to use a home-use washing machine, commercially available neutral detergent Zabu (Kao Soap ■) 2g/l, bath ratio 1:50.
After washing at 40° C. for 20 minutes to remove liquid, the samples were washed with overflow water for 5 minutes and turned over twice.

Example 6. Comparative Example 4.5 Graft polymerization of acrylic acid and methacrylic acid Mu equivalent /
1.5 d x 44 sq. of polyester fibers with Gram fiber introduced were made into 60 count spun yarn and knitted into socks. The socks were immersed in an aqueous solution containing 10 g of cetyl dimethyl benzyl ammonium chloride at a bath ratio of 1:60, and the temperature was gradually raised to 95° C. for 30 minutes. This product had carboxyl terminal groups similar to cetyl dimethyl benzyl ammonia 1.2, and had antibacterial properties with excellent wash resistance. Furthermore, even when worn for three consecutive days, there was no unpleasant odor, and it was proven that it was also provided with deodorizing properties.

Example 4 Ordinary polyacrylonitrile fiber (3dx76fIn
]ll) in an aqueous solution consisting of 20 g// of l-IJ hydroxide (shrinkage rate 10%).

The samples were immersed at a bath ratio of 1:100, heated to 95° C., and then treated for 30 minutes. The amount of carboxyl groups in this product was 3.1 x 10-' gram equivalent/gram. Next, after washing with water, it was immersed in an aqueous solution containing 10% by weight of lauryl dimethyl benzyl ammonium chloride at a bath ratio of 1:100, heated to an elevated temperature, and treated at 95° C. for 30 minutes.

This product contains 1.9 x 10-' gram equivalent/g of the ammonium salt mentioned above, resulting in a spun yarn with extremely high antibacterial properties, and when knitted into tights and worn for one time, it had great odor resistance and was an excellent product. became.

Claims (1)

[Claims] A polyamide, polyester or polyacrylonitrile fiber having an acidic group of 10-' gram equivalent/gram or more contains a quaternary nitrogen compound having antibacterial properties by substitution in an amount of 0x10-5 gram equivalent per gram of the fiber. Underwear and socks made mainly from modified fibers.