JP2003250717A - Sponge made of devil's tongue jelly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sponge made of devil's tongue jelly (konjac) which has satisfactory antibacterial properties and mildew resistance. <P>SOLUTION: This sponge is fixed with resin particles with a particle diameter of 5-100 μm, which allow an antibacterial agent to bleed, at a 0.1-10% dry weight ratio by using an acrylic resin liquid and epoxy crosslinking agent, and fibers supporting the resin particles with the particle diameter of 5-100 μm which allow an antibacterial agent to bleed are kneaded at a 1-20% dry weight ratio into konjac mannan in a sponge made of devil's tongue jelly which is formed by dissolving the konjac mannan in water. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a konjac sponge having excellent antibacterial and antifungal properties.

[0002]

2. Description of the Related Art Plate-shaped konjac has long been known to become a sponge by repeatedly freezing and thawing outdoors in winter, and has been handed down as a preserved food in various regions including the northern Kanto region. It is also widely known that this konjac sponge was used for removing hair in some regions. In recent years, in addition to babies, women with sensitive skin and elderly people with xerosis have come to be used as a skin-friendly cleaning tool. However, konjac sponge contains a large amount of water at the time of use, and it takes a long time to dry naturally after use, so that molds and bacteria grow in a short time, discoloration of the sponge, and growth of microorganisms. In the case of a large size, there is a problem that the strength is lowered and a breakage occurs.

In order to improve the above-mentioned problems, natural products such as chitosan and hinokitiol, inorganic antibacterial agents such as silver, zinc, titanium oxide and their supports, and organic antibacterial agents are also included. ZPT (zinc pyrithione), TBZ (thiabendazole) and the like are kneaded at the time of manufacturing the sponge, or are soaked and fixed after the sponge is manufactured, which is called post-processing.

[0004]

However, in the above kneading means, since the high temperature alkali treatment is carried out during the production of the sponge, there is a disadvantage that the antibacterial agent is deactivated or is eluted into hot water. Will occur. Further, in the post-processing as well, the antibacterial agent does not sufficiently bind to konjac (the main component is konjak mannan), so that there is a problem that an undesirable phenomenon of elution in a short time occurs during use.

As described above, even if the conventional konjac sponge has an antibacterial agent and an antifungal agent added thereto, its antibacterial and antifungal properties are still not at a sufficiently satisfactory level, and it is less than one month. In the actual situation, there was a phenomenon in which mold generated on the surface of the sponge became visible with the naked eye within a certain period of use. It is an object of the present invention to eliminate such inconvenience and provide a konjac sponge having good antibacterial and antifungal properties.

[0006]

The present invention for achieving the above object comprises the following items. (1) Resin particles of 5 to 100 μm capable of bleeding an antibacterial agent were fixed to a konjac sponge using an acrylic resin liquid and an epoxy crosslinking agent at a dry weight ratio of 0.1 to 10%. Konjac sponge characterized by. (2) In a konjac sponge formed after dissolving konjak mannan in water, a fiber carrying resin particles of 5 to 100 μm capable of bleeding an antibacterial agent was added to konjak mannan at a dry weight of 1 to 20%. A konjac sponge characterized by being kneaded in a ratio.

5 to 100 that enable bleeding of antibacterial agents
When the added amount of the resin particles of μm is less than 0.1%, the antibacterial and antifungal properties are insufficient, and a sufficient inhibition circle cannot be obtained in the halo test described later. Also,
When the addition amount of the resin particles exceeds 10%, there arises a problem that the konjac sponge is colored and gelation is delayed after adding a lye (lye) during the production of the sponge.
If about 1% of these resin particles are contained in the sponge,
It had sufficient antibacterial and antifungal performance. When the addition amount of the resin particles of 5 to 100 μm that enables the bleeding of the antibacterial agent is 0.1% and the addition amount of the fibers is less than 1%, the resin particles cannot be sufficiently fixed on the fibers, and as a result, As a result, the antibacterial and antifungal performance became insufficient. Further, if the amount of the fiber added exceeds 20%, there is a problem in that the feel of the konjac sponge during use deteriorates.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. The resin particles of 5 to 100 μm capable of bleeding the antibacterial agent used in the present invention include, but are not limited to, methyl methacrylate copolymer, petroleum hydrocarbon, silicon dioxide and zinc pyrithione (ZPT). As a commercially available product, Cosmo Pearl AB can be used.
-5 (manufactured by Negami Industry Co., Ltd.) and the like.

In addition to the above-mentioned materials for the resin particles, polyacrylic acid type resin, polyurethane type resin, polystyrene type resin, polyester type resin, epoxy type resin or silicone type resin can be used in the present invention. . In addition, ZPT as a bleed-out ingredient
TB, which is widely known as an antibacterial and antifungal agent,
Z, BCM, triclosan, chlorhexidine hydrochloride, various antibiotics and the like can also be used in the present invention.

The resin particles contain a bleeding modifier, and the antibacterial agent is gradually bleed out when the konjac sponge is used. In addition, even if it is used daily, it has a long-lasting stable bleed-out for 2-3 months or more, and it is highly durable even if soap is used. Further, even if the sponge is reused, it has a feature that bleed-out starts immediately. 5 resin particles
It has a fine spherical shape of -100 μm. For this reason, it is easy to uniformly disperse in the sponge, and when cleaning the skin, it is easy to slip and does not give a strange feeling. When the number of particles of 5 μm or less increases, there is a problem that bleedout persistence is reduced. Further, if the number of particles having a size of 100 μm or more increases, the dispersion in the sponge becomes non-uniform, and an uncomfortable feeling occurs when washing the skin.

The fibers used in the present invention include:
Although not particularly limited, examples thereof include those made of rayon and having a denier of 1 to 5 and a length of about 0.1 to 1.0 mm. These fibers are impregnated with denatured ethanol / aqueous solution of didecyldimethylammonium chloride. -It can be prepared by drying.

[0012]

EXAMPLES The present invention will be described below in detail based on examples, but the present invention is not limited to these examples.

Example 1 A konjac sponge was post-processed to have a dry weight ratio of 3.
0% Cosmo Pearl AB-5 (trade name: Negami Kogyo Co., Ltd.)
(The same applies hereinafter) is fixed using an acrylic resin liquid and an epoxy crosslinking agent, and 0.1 times of a neutral detergent is used, and 50 times of hand scrubbing is repeated 5 times in warm water of 40 ° C. After that, 50 times of hand-washing was repeated 3 times in warm water of 40 ° C. without using detergent. Then, as a result of a halo test using Aspergillus niger (IFO6341) and Escherichia coli (E.coli JCM1649) according to JIS L1902, an inhibition circle of about 0.5 mm could be obtained in each case. Further, water was added to the test piece, and one week later, measurement was performed, and an inhibition circle of 2 mm or more was obtained. In addition, the same sponge as that used for the halo test was scanned with a scanning electron microscope (SE
The surface was observed using M) at a magnification of 300 times. As a result, it was confirmed from the unevenness of the surface that spherical resin particles were contained inside the konjac of the sponge.

Example 2 10 g of Cosmo Pearl AB-5 was dispersed in 20 ml of ethanol, 10 g of rayon fiber (3 denier, 0.5 mm in length) and 150 ml of water were added and stirred,
To this, 4 ml of an epoxy-based cross-linking agent (ethylene glycol diglycidyl ether) was added, and after stirring, 60 to 70 ° C.
A composite of Cosmopearl AB-5 and the fiber was obtained by drying with. This complex was kneaded with konjak mannan at a dry weight ratio of 8% to give a
Was added, heated in water, and then frozen. After thawing and drying, IP
Zinc was quantified by C emission spectroscopy. When converted from the quantitative value, 5.4% of the complex was fixed and remained.
This sponge was washed 100 times in warm water at 40 ° C with 0.1% neutral detergent, and then washed 100 times in warm water at 40 ° C, and then washed 100 times in warm water at 40 ° C without detergent. Was repeated 3 times.

The above-mentioned konjac sponge is compliant with JIS / L /
In accordance with 1902, Aspergill Snigger (IFO6
341) and Escherichia coli (E. coli JCM1649) were used to perform a halo test. As a result, an inhibition circle of about 0.5 mm could be obtained. Further, water was added to the test piece, and one week later, measurement was performed, and an inhibition circle of 2 mm or more was obtained. The composite of Cosmopearl AB-5 and the fiber obtained by the above-mentioned method was used to measure 300 by using a scanning electron microscope (SEM).
It was observed at double magnification. As a result, it was confirmed that spherical resin particles were supported on the surface of the fiber. Further, the surface of the same sponge that was subjected to the halo test was observed with a scanning electron microscope (SEM) at a magnification of 300 times. As a result, it was confirmed from the unevenness of the surface that the fiber carrying the spherical resin particles was contained inside the konjac of the sponge.

Comparative Example 1 10% by dry weight of Cosmo Pearl AB-5 was kneaded with konjac mannan. The konjac sponge thus obtained was washed 50 times in warm water at 40 ° C with 0.1% neutral detergent for 5 times and then 50 times in warm water at 40 ° C without detergent. The hand-washing was repeated three times.
Then, according to JIS L 1902, Aspergillus niger (IFO6341) and E. coli JCM
1649), a halo test was carried out, and as a result, a sufficient stopping circle could not be obtained. Comparative Example 2 A konjac sponge was produced in the same manner as in Example 1, using 0.05% by dry weight of Cosmopearl AB-5. The conditions for hand-washing were the same as in Example 1, and JIS /
In compliance with L. 1902, Aspergill Snigger (IFO
6341) and E. coli (E. coli JCM1649),
As a result of the halo test, it was not possible to obtain a sufficient stopping circle.

Comparative Example 3 In the same manner as in Example 2, a composite of Cosmo Pearl AB-5 and fiber was obtained. This complex was kneaded and kneaded with konjak mannan at a dry weight ratio of 0.5%, and added with aqua (lye) to heat in water and then frozen. This sponge was washed 50 times in warm water at 40 ° C with 0.1% neutral detergent, then washed 50 times in warm water at 40 ° C, and then washed 50 times in warm water at 40 ° C without detergent. Was repeated 3 times. After this,
A halo test was performed using Aspergillus niger (IFO6341) and Escherichia coli (E.coli JCM1649) according to JIS L1902, and as a result, no sufficient inhibition circle was obtained.

[0018]

As described above, according to the konjac sponge of the present invention, since the antibacterial and antifungal agent is firmly held, bacteria and mold that adhere to and grow on the sponge are suppressed for a long period of time. It Further, bleeding of the antibacterial / antifungal agent can be expected to sterilize the surface of the washed product, which is extremely useful.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // A61L 2/16 A61L 2/16 Z (72) Inventor Satoshi Mitsuta 2-chome, Sannomachi, Nishi-ku, Hiroshima-shi, Hiroshima No. 2-8 Nishikawa Rubber Industry Co., Ltd. (72) Inventor Teijin Hisayama 6-3-41 Nishi-Awaji, Higashiyodogawa-ku, Osaka City, Osaka Prefecture F-Term (Reference) 2D034 CA00 4C058 AA07 BB07 CC01 EE11 JJ03 JJ07 JJ08 JJ21 4H011 AA01 AA02 BA04 BB09 BC18 BC19 BC22 DA09 DF03 DH02 DH04 DH05 DH07

Claims (2)

[Claims] 1. A konjac sponge containing 0.1 to 1 to 5 to 100 μm resin particles capable of bleeding an antibacterial agent.
A konjac sponge characterized by being fixed using an acrylic resin liquid and an epoxy crosslinking agent at a dry weight ratio of 0%. 2. A konjac sponge formed after dissolving konjak mannan in water, which allows bleeding of an antibacterial agent to konjak mannan in an amount of 5 to 100 μm.
A konjac sponge characterized by kneading the fibers carrying the resin particles described above in a dry weight ratio of 1 to 20%.