JP3787100B2 - Konjac sponge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a konjac sponge excellent in antibacterial and antifungal properties.
[0002]
[Prior art]
Plate-shaped konjac has long been known to become sponge-like by repeated freezing and thawing outdoors in the winter, and has been handed down as a preserved food in various places including Kita Kanto.
It is also widely known that this konjac sponge has been used as a hair removal in some regions.
In recent years, it has come to be used as a skin-friendly cleaning tool not only for infants but also for women with sensitive skin and elderly people with psoriasis.
However, konjac sponges contain a large amount of moisture during use, and it takes a long time for natural drying after use. Therefore, mold and bacteria grow in a short time, and the sponge is discolored and microorganisms grow. In the case of increasing the size, there was a problem that tearing occurred due to a decrease in strength.
[0003]
In order to remedy the above problems, natural products such as chitosan and hinokitiol, inorganic antibacterial agents such as silver, zinc, titanium oxide and their carriers, and further organic antibacterial agents such as ZPT (Zinc pyrithione), TBZ (thiabendazole) and the like are kneaded during the production of the sponge, or referred to as post-processing, and are immersed and fixed after the production of the sponge.
[0004]
[Problems to be solved by the invention]
However, in the kneading means, high temperature alkali treatment is performed at the time of producing the sponge, so that the antibacterial agent is deactivated or eluted into hot water.
In addition, in the post-processing, the antibacterial agent does not sufficiently bind to konjac (the main component is konjac mannan), so that there is a problem that an undesirable phenomenon of elution in a short time during use occurs.
[0005]
As described above, even if the conventional konjac sponge is added with an antibacterial agent and an antifungal agent, the antibacterial and antifungal performance is not at a sufficiently satisfactory level, and it is used for less than one month. During the period, there was a situation in which a lot of phenomena occurred in which the mold generated on the sponge surface could be confirmed with the naked eye.
An object of the present invention is to provide a konjac sponge having good antibacterial and antifungal properties by eliminating such disadvantages.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises the following items.
(1) 5 to 100 μm resin particles capable of bleeding antibacterial agents were fixed to konjac sponge using an acrylic resin solution and an epoxy crosslinking agent at a dry weight ratio of 0.1 to 10%. Konnyaku sponge that features.
(2) In the konjac sponge formed after dissolving konjac mannan with water, the fiber carrying 5-100 μm resin particles enabling antibacterial bleed to konjac mannan, 1-20% dry weight A konjac sponge characterized by kneading in a ratio.
[0007]
When the amount of 5-100 μm resin particles that enable bleeding of the antibacterial agent is less than 0.1%, the antibacterial and antifungal properties are insufficient, and a sufficient inhibition circle can be obtained in the halo test described later. There wasn't. In addition, when the amount of the resin particles added exceeds 10%, the konjac sponge is colored, and there is a problem that gelation is slowed after adding lye (ash) during the production of the sponge.
The resin particles had sufficient antibacterial and antifungal properties when contained in the sponge at about 1%.
When the addition amount of the resin particles of 5 to 100 μm enabling 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 to the fibers, and as a result As antibacterial and antifungal performance became insufficient. Moreover, when the added amount of the fiber exceeded 20%, there was a problem that the feeling when using the konjac sponge was lowered.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The resin particles of 5 to 100 μm that enable bleeding of the antibacterial agent used in the present invention are not particularly limited, but include methyl methacrylate copolymer, petroleum hydrocarbon, silicon dioxide, and zinc pyrithione (ZPT). Examples of the commercially available product include Cosmo Pearl AB-5 (manufactured by Negami Kogyo Co., Ltd.).
[0009]
In addition to the above-mentioned materials for resin particles, polyacrylic acid resins, polyurethane resins, polystyrene resins, polyester resins, epoxy resins, silicone resins, and the like can also be used in the present invention.
In addition to ZPT as a bleed-out component, TBZ, BCM, triclosan, chlorhexidine hydrochloride, various antibiotics and the like widely known as antibacterial and antifungal agents can be used in the present invention.
[0010]
The resin particles contain a bleed adjuster, and the antibacterial agent gradually bleeds out when the konjac sponge is used. Moreover, even if it uses every day, it has the sustainability of bleeding out stably for more than 2 to 3 months, and even if it uses soap etc., it is rich in durability. Further, even when the sponge is reused, it has a feature that bleed out starts immediately.
The resin particles have a fine spherical shape of 5 to 100 μm. For this reason, it is easy to disperse | distribute uniformly to sponge, and when wash | cleaning skin, it is slippery and does not give a discomfort. When the number of particles of 5 μm or less increases, there arises a problem that the sustainability of the bleed out is lowered. Moreover, when the particle | grains of 100 micrometers or more increase, dispersion | distribution within sponge will become non-uniform | heterogenous, or when a skin is wash | cleaned, it will become uncomfortable.
[0011]
In addition, the fiber used in the present invention is not particularly limited, but examples thereof include those made of rayon having 1 to 5 denier and a length of about 0.1 to 1.0 mm. It can be prepared by impregnating and drying a modified ethanol / water solution of didecyldimethylammonium.
[0012]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not restrict | limited by this Example.
[0013]
Example 1
As a post-processing on konjac sponge, fix Cosmo Pearl AB-5 (trade name: manufactured by Negami Kogyo Co., Ltd., hereinafter the same) with a dry weight ratio using an acrylic resin solution and an epoxy crosslinking agent. After washing 5 times with 50% hand-washing in warm water at 40 ° C using 0.1% neutral detergent, 50 times hand-washing in warm water at 40 ° C without using detergent Repeated 3 times.
Thereafter, a halo test was performed using Aspergillus niger (IFO6341) and Escherichia coli (E.coli JCM1649) in accordance with JIS L1902, and as a result, a blocking circle of about 0.5 mm could be obtained. Further, when water was added to the test piece and measured after one week, an inhibition circle of 2 mm or more was obtained.
Note that the surface of the same sponge as that subjected to the halo test was observed at a magnification of 300 times using a scanning electron microscope (SEM). As a result, it was confirmed from the irregularities on the surface that spherical resin particles were contained in the konjac of the sponge.
[0014]
Example 2
After 10 g of Cosmopearl 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, and an epoxy crosslinking agent ( 4 ml of ethylene glycol diglycidyl ether) was added and stirred, and then dried at 60 to 70 ° C. to obtain a composite of Cosmopearl AB-5 and fibers.
This composite was kneaded with konjac mannan at a dry weight ratio of 8%, added with ak (ash), heated in water and then frozen.
After thawing and drying, zinc was quantified by IPC emission spectrometry. When converted from the quantitative value, 5.4% of the complex was fixed and remained.
This sponge is washed with 100% hand-washing in warm water at 40 ° C 5 times using 0.1% neutral detergent, and then hand-washing 100 times in warm water at 40 ° C without using detergent. Was repeated three times.
[0015]
The above konjac sponge was subjected to a halo test using Aspergillus niger (IFO6341) and Escherichia coli (E.coli JCM1649) in accordance with JIS L.1902. did it. Further, when water was added to the test piece and measured after one week, an inhibition circle of 2 mm or more was obtained.
In addition, the complex of Cosmopearl AB-5 and fiber obtained by the above-mentioned method was observed at a magnification of 300 times using a scanning electron microscope (SEM). As a result, it was confirmed that spherical resin particles were supported on the fiber surface.
Moreover, the surface of the same sponge as that subjected to the halo test was observed at a magnification of 300 times using a scanning electron microscope (SEM). As a result, it was confirmed from the irregularities on the surface that the konjac of the sponge contained fibers carrying spherical resin particles.
[0016]
Comparative Example 1
The konjac mannan was kneaded with 10% Cosmopearl AB-5 in a dry weight ratio.
The konjac sponge thus obtained was washed 50 times in 40 ° C warm water with 0.1% neutral detergent 5 times and then 50 times in 40 ° C warm water without using detergent. The hand scrub was repeated 3 times.
Thereafter, as a result of a halo test using Aspergillus niger (IFO6341) and Escherichia coli (E.coli JCM1649) in accordance with JIS L1902, none of them could provide a sufficient inhibition circle.
Comparative Example 2
A konjac sponge was produced in the same manner as in Example 1, using Cosmopearl AB-5 at a dry weight ratio of 0.05%. The conditions for washing hands were also the same as in Example 1, and as a result of performing a halo test using Aspergillus niger (IFO6341) and Escherichia coli (E.coli JCM1649) in accordance with JIS L1902, both were sufficient. I couldn't get a stop circle.
[0017]
Comparative Example 3
In the same manner as in Example 2, a composite of Cosmopearl AB-5 and fiber was obtained. This composite was kneaded and mixed with konjac mannan at a ratio of 0.5% by dry weight, added with ak (ash juice), heated in water and then frozen.
This sponge was washed with 50% hand-washed water in 40 ° C warm water 5 times with 0.1% neutral detergent, and then hand-washed 50 times in 40 ° C warm water without using detergent. Was repeated three times.
After this, as a result of a halo test using Aspergillus niger (IFO6341) and Escherichia coli (E.coli JCM1649) in accordance with JIS L1902, none of them could provide a sufficient inhibition circle.
[0018]
【The invention's effect】
As described above, according to the konjac sponge of the present invention, the antibacterial and antifungal agent is firmly held, so that bacteria and molds that adhere to and grow on the sponge are suppressed over a long period of time. In addition, the antibacterial and antifungal agent bleed can be expected to sterilize the surface of the cleaning object, which is extremely beneficial.

Claims (2)

It is characterized in that 5 to 100 μm resin particles capable of bleeding an antibacterial agent are fixed on 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. In a konjac sponge formed after dissolving konjac mannan with water, fibers carrying 5-100 μm resin particles capable of bleeding antibacterial agents are kneaded with konjac mannan at a dry weight ratio of 1-20%. A konjac sponge that is characterized by being squeezed.