KR20070029298A - Antibiotic wet tissue comprising nano-sized silver and photocatalyst - Google Patents

Abstract

An anti-biotic wet tissue comprising nano-sized silver and photo-catalyst is provided to contain nano-sized silver and nano-sized particles including titanium dioxide. The anti-biotic wet tissue includes nano-sized silver having the average diameter of 5 to 50 nm and the purity of above 92% and photo-catalyst. The nano-sized particle including titanium dioxide is a rutile or anatase type of titanium dioxide particles having the average diameter of 5 to 10 nm. The aqueous mixture containing of nano-sized silver and nano-sized particles including titanium oxide with 01 to 15 wt% in each is impregnated into the original sheet so that the anti-biotic wet tissue is obtained.

Description

ANTIBIOTIC WET TISSUE COMPRISING NANO-SIZED SILVER AND PHOTOCATALYST}

1 to 3 are photographs of the antimicrobial test results for E. coli, respectively, using a blank medium, an antimicrobial wet tissue-containing medium according to the present invention, and a commercial wet tissue-containing medium.

The present invention relates to a functional wet tissue having excellent antimicrobial properties against bacteria that are present on the skin.

In general, wet tissue (wet tissue or wet wiper) refers to a product made to clean the skin by adding purified water, moisturizers, surfactants, vegetable preservatives and fragrances to the non-woven fabric, disposable products, such as used for various hygienic purposes For example, wet wipes used for the discharge of feces from a baby, disposable wipes used in restaurants or public places for cleanliness, and all other disposable products used for hygienic purposes. Since the wet tissue products are used directly on the skin of the human body, safety on the skin is most important, and at the same time, the ability to remove foreign substances and pathogenic microorganisms remaining on the skin and antibacterial properties are also required. Recently, functional wipes products have been produced to obtain pharmacological effects by adding various drugs according to preferences and various purposes of users as well as such hygiene functions.

In particular, in the case of disposable absorbent products such as diapers for the hygienic treatment of urine or body fluids, urea components contained in the body fluids are decomposed by microorganisms and enzymes present in the feces or skin when the product is used to generate ammonia to stimulate skin irritation. May cause diaper rash, redness and dermatitis due to chemicals and physical stimuli contained in the product itself, and may result from the use of such disposable absorbent products. Functional wipes for preventing diaper rash, red spots and dermatitis caused by hydration of keratin and continual friction of skin and secondary infection of pathogenic microorganisms are required.

However, the wet tissue products on the market are manufactured on the principle of dissolving foreign substances by wiping off the dirt by using a surfactant as a main ingredient, and when used in sensitive areas such as local parts of the body, surfactants or ethyl alcohol contained in wet tissues are used. Due to the irritation, even if there is no irritation irritation is merely a wiping action, there is a limit to remove the bacteria that can remain in the local. In addition, although a topical cleaning member that can be sterilized is used for medicines, since it is classified as a medicine, there are a lot of restrictions on use that cannot be easily purchased by the general public in real life. There is an urgent need to develop functional tissues for cleaning with bactericidal effect.

The present inventors have diligently studied to solve these problems, and according to the present invention, wet wipes containing nano silver having antimicrobial properties and titanium dioxide nano particles having deodorizing properties have excellent skin safety and are effective on pathogenic microorganisms which are on the skin. The present invention was completed by confirming that the antimicrobial properties are excellent, as well as effectively reducing or preventing diseases such as diaper rash and diaper rash, which may occur when using disposable absorbent products.

An object of the present invention is to provide a functional wet tissue that is hygienic and excellent in stability to the skin, but also excellent in antibacterial activity against bacteria present in the skin.

In accordance with the above object, the present invention provides an antibacterial wipes containing nanosilver and titanium dioxide nanoparticles.

Hereinafter, the present invention will be described in detail.

As long as the nanosilver contained in the wet tissue product of the present invention has a nanosize, any nanosilver having an average particle diameter of 5 to 50 nm and a purity of 92% or more is preferable. If titanium dioxide also has a nano-size can be used irrespective of the crystal structure such as rutile or anatase, it is preferable to use titanium dioxide nanoparticles having excellent optical properties of the average particle diameter of 5 to 10 nm. In this case, nano silver may be prepared according to a conventional sol-gel method, titanium dioxide nanoparticles may be prepared according to the Republic of Korea Patent Publication No. 2004-100732.

In addition, the wet tissue product of the present invention may further include by selecting the components contained in conventional wet tissue products, for example, purified water, moisturizers, surfactants, pH adjusting agents, vegetable preservatives and fragrances.

The wet tissue product of the present invention contains nanosilver, which is known as a metal having strong molecular contact activity, low cost, and is safe for human body even in the absence of light, and titanium dioxide nanoparticles having a deodorizing function and harmless to human body. It can be safely used in the human body while effectively inhibiting the growth of pathogenic microorganisms, which is the primary or secondary cause of dermatitis caused by the use of the product.

The wet tissue product of the present invention may be prepared by impregnating a liquid mixture containing nano silver, titanium dioxide nanoparticles, and other components used in wet tissue products in a fabric sheet such as natural nonwoven or pulp according to a conventional method. In this case, the content of the nanosilver and titanium dioxide nanoparticles is appropriately in the range of 0.1 to 15% by weight, preferably 1 to 10% by weight of the total weight of the liquid mixture, respectively, and less than 0.1% by weight effectively inhibit the growth of pathogenic microorganisms If it is not more than 15% by weight, the wet tissue may discolor in a subsequent process.

Hereinafter, the present invention will be described in detail by way of examples.

However, the following examples are merely to illustrate the invention, but the content of the present invention is not limited to the following examples.

EXAMPLES Preparation of the Wipes Product According to the Invention

200 ppm and 5 nano silver (Daeju Electronics Metal Powder Division, particle size range: 5 to 10 nm, purity: 5000 ppm) and titanium dioxide nanoparticles (Korean Patent Publication No. 2004-100732, particle size distribution: 5 to 10 nm) Ethanol: water was added to the mixed solvent mixed 1: 4 so as to be contained in a weight%, and then mixed, and it was impregnated into a fabric sheet such as natural nonwoven fabric or pulp. The impregnated sheet was placed in an oven and dried at 40 ° C. for 3 minutes to prepare a wet tissue according to the present invention.

Antimicrobial test

Antibacterial test for E. coli was performed on the wet tissue according to the present invention. Into each of the 250 ml flasks, 70 ml of phosphate buffer and 5 ml of E. coli (Escherichia coli, Accession No .: ATCC 25922) inoculation, respectively, were added to one flask, 0.75 g of the wet tissue obtained in the above example, and the other flask. To this was added 0.75 g of an existing wet tissue (Crineex, pH 5.5, Yuhan-Kimberly) finely cut (1 × 1 cm or less), and each flask was shaken (320 rpm) for 1 hour at 25 ± 5 ° C. Each shaken culture was diluted 10-fold with phosphate buffer solution, streaked in agarose medium, and each medium was incubated at 37 ° C. for 24 hours.

As a result, as shown in Figures 1 to 3, the medium added with the wet tissue product (Fig. 2) of the present invention showed a 99.9% bacterial reduction rate compared to the control group without the addition of wet tissues (Fig. 1). It was confirmed that it is far superior to the antimicrobial activity of the existing wet tissue product (Fig. 3).

As described above, even in the absence of light according to the present invention, it has a strong molecular contact activity, is inexpensive, and contains titanium dioxide nanoparticles which are harmless to the human body while having a deodorizing function and nano silver known as a metal safe to the human body. The wet tissue product is excellent in stability to the skin and has excellent antibacterial and hygienic properties to bacteria on the skin, so it can be usefully used for the prevention and suppression of dermatitis caused by the use of disposable absorbent products.

Claims (4)

Antimicrobial wipes containing nanosilver and titanium dioxide nanoparticles. The method of claim 1, Antimicrobial wipes characterized in that the nanosilver has an average particle diameter of 5 to 50 nm and a purity of 92% or more. The method of claim 1, Antimicrobial wipes characterized in that the titanium dioxide nanoparticles are rutile or anatase type titanium dioxide particles having an average particle diameter of 5 to 10 nm. The method of claim 1, The antimicrobial wipes, characterized in that obtained by impregnating the fabric sheet with a liquid mixture containing nanosilver and titanium dioxide nanoparticles in the range of 0.1 to 15% by weight, respectively.

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