JP2607449B2 - Sponge-like konjac composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sponge-like konjac composition having an antibacterial and antifungal effect.

[0002]

2. Description of the Related Art Sponge-like konjac is prepared by drying a slice of konjac potato, milling it into a fine powder, adding water or warm water to a paste, adding a coagulant such as calcium hydroxide to the paste, and heating. It is obtained by solidifying into a plate-like konjac, then temporarily freezing it to separate water and konjac components, returning to room temperature again and thawing. The spongy konjac obtained in this way has a softer touch than polyurethane, synthetic rubber, and sashimi, and has been used as a cleaning tool without damaging the skin.

[0003]

However, the sponge-like konjac is often stored in a state of being hydrated after use, and as time passes, molds are generated on the surface of the konjac, or the hydrated water contains bacteria. There is a problem that it rots and gives off a bad smell. The sponge-like konjac in such a state is extremely difficult to use because it has a significantly deteriorated usability, and its improvement has been desired in advance.

The present invention has been made in view of such circumstances, and it is difficult to attract bacteria in the air and water.
Moreover, the present invention aims to provide an antibacterial and antifungal sponge-like konjac composition which has an action of suppressing the growth of various bacteria and can be used in a clean state at all times.

[0005]

Means for Solving the Problems In order to achieve the above object, the gist of the present invention is to provide a porous material obtained by freezing, thawing and drying konjac, which comprises the following (A)
It is to contain 0.05 to 3.0 parts by weight of a compound and / or 0.1 to 5.0 parts by weight of the following compound (B). For example, a mixture of powdered konjac potato and the following powder (A) and / or compound (B), an appropriate amount of a dispersion, and the like, and a coagulant such as water and calcium hydroxide are added to the mixture to form a paste-like kneaded product. After the paste-like kneaded product is formed into an appropriate shape, the composition is frozen, returned to room temperature again, thawed and dried to obtain the sponge-like konjac composition of the present invention. (A) A compound represented by the following general formula (1).

Embedded image (Where R ₁ is hydrogen or —NHCONH (CH ₂ )
₃ CH ₃ group, R ₂ is a thiazolyl group or —NHC00C
(B represents a H ₃ group) (B) A compound represented by the following general formula (2).

Embedded image (Where M is a monovalent and divalent metal atom, and n is 1 or 2)

Specific examples of the compound (A) include 2- (4-thiazolyl) benzimitazole represented by the following formula:

Embedded image 2-carbomethoxyaminobenzimidazole represented by the following formula,

Embedded image Or methyl-1-butylcarbamoyl-2-benzimidazole carbamate represented by the following formula:

Embedded image And the like.

Specific examples of the compound (B) include bis (2-pyridylthio-1-oxide) zinc, bis (2-pyridylthio-1-oxide) manganese, and bis (2-pyridylthio-1-oxide). Iron, bis (2-pyridylthio-1-oxide) nickel, bis (2-pyridylthio-1-oxide) barium, bis (2-pyridylthio-1-oxide) copper, bis (2-pyridylthio-oxide)
1-oxide) magnesium, 2-pyridylthio-1-
Examples thereof include sodium oxide, potassium 2-pyridylthio-1-oxide, and lithium 2-pyridylthio-1-oxide.

When the compound (A) and / or compound (B) is blended with the spongy konjac composition of the present invention, the compound (A) and / or the powder of the compound (B) are prepared in advance. Done (A)
A dispersion of the compound and the compound (B) can be added. In this case, the compounding amount of the compound (A) is 0.05 to 3.0 parts by weight, preferably 0.3 to 1.0 part by weight, based on 100 parts by weight of the spongy konjac composition. That is, if the amount of the compound exceeds 3.0 parts by weight, safety problems such as strong irritation of the skin may occur. This is because the antifungal effect is reduced and the object of the present invention cannot be achieved.

The compounding amount of the compound (B) is 0.1 to 5.0 parts by weight, preferably 0.5 to 2.0 parts by weight based on 100 parts by weight of the spongy konjac composition.
Parts by weight. That is, when the amount of the compound exceeds 5.0 parts by weight, problems such as skin irritation and quality deterioration of the sponge-like konjac composition itself occur. Conversely, when the amount is less than 0.1 part by weight, This is because the antibacterial and antifungal effects are reduced and the object of the present invention cannot be achieved.

In producing the spongy konjac composition of the present invention as described above, other additives, modifiers, or reinforcing materials such as fibers may be added.

[0011]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples. Prior to this, a method for testing mold and bacteria will be described.

For the mold test, Aspergillus niger (ATCC 6275), penicillium citrinum (ATCC 9849), Rhizopus nigricans (SN32), Cladosporium herbalm (IAMF517), ketomium globo specified in JIS Z 2911. Sum (ATCC
6205), Aspergillus niger (ATCC9642), Aspergillus flavus (ATCC9643), Aspergillus besicolor (ATCC11730), Penicillium funiculosum (ATCC11797), and ketomium globosum (ATCC6205) defined by MIL STD810C. Different strains are used. In the bacterial test, four types of strains, S. aureus, Pseudomonas, Escherichia coli, and Bacillus subtilis, are used.

(A) Mold test by agar plate culture method According to the paint test according to JIS Z 2911, the above 5
Each mold strain is used. First, a potato dextrose agar medium is aseptically dispensed into a 9 cm diameter petri dish and solidified. The spongy konjac (sample) of each of the examples described below is placed in the center of the Petri dish, and a mixed spore suspension of five kinds of mold strains is uniformly sprayed on the medium surface and the sample surface. Cover the dish. The petri dishes are cultured at a relative humidity of 95% and a humidity of 28 ± 2 ° C. for 7 to 10 days.

(B) Bacterial test by agar plate culture method The above four types of bacterial strains were heat-sterilized beforehand, respectively.
Inoculate a normal agar medium cooled to an appropriate temperature and mix well. Next, the mixture is dispensed into a 9 cm diameter petri dish and solidified, and then the sponge-like konjac of each embodiment described later is placed at the center thereof, and the lid is covered. The petri dishes are cultured at a temperature of 30 ± 1 ° C. for 3-5 days.

(C) Mold test by the improved agar plate method Each of the above five types of mold strains is used. In the same manner as in the above test method (a), 30 × 30 × 2 was placed on the sponge-like konjac of each example placed on an agar plate in a Petri dish.
mm potato dextrose film agar film is placed.
Next, a suspension of the mold spores of the five mold strains was evenly sprayed on the base agar, the sample surface, and the film agar film, and the cap was placed on a petri dish, followed by 7 to 10 days at a temperature of 28 ± 2 ° C. Incubate.

Evaluation of the above tests (a) and (b) 〇: Remarkable growth inhibition band △: Slightly observed growth inhibition band ×: No growth inhibition band

Evaluation of the above test (c): 〇: There is a band of inhibition on the base plate agar and no growth of fungi or bacteria on the spongy konjac upper film agar. △: No band is formed on the base plate agar, but sponge-like. Little growth of fungi or bacteria on konjac upper film agar x: No inhibition zone was formed on base plate agar, and growth of fungi or bacteria was observed on spongy konjac upper film agar.

[0018]

【Example】

Examples 1 to 7 Cut konjac potatoes, dry until the water content becomes about 15% to make coarse flour, further pulverize this to refined konjac raw material, 30 to 60 times by weight ratio after kneading by adding water, as shown in the following table 1 2- (4-thiazolyl) benzoimidazole Mita tetrazole 50% dispersion of bis (2-pyridylthio) zinc-1,1 ^'- dioxide 50% dispersion Was mixed so as to have a prescribed weight% with respect to the final spongy konjac to obtain a paste-like konjac. The paste konjac was added with calcium hydroxide as a coagulant and placed in a mold to obtain a molded product, which was heated in hot water, pulled up from the hot water and cut into a plate shape. The plate-like konjac thus obtained was once frozen, the water in the konjac was separated from the konjac component, and then returned to normal temperature, thawed and dried to produce a sponge-like konjac composition. Table 1 shows the results of the above-described mold test and bacterial test performed on the spongy konjac composition.

Except without blending dioxide in the same manner as in the above embodiment sponge-like konjac composition - [0019] Comparative Example 1 2- (4-thiazolyl) benzoimidazole Mita tetrazole and bis (2-pyridylthio) zinc-1,1 ^' It was manufactured and subjected to a mold test and a bacterial test, and the results are shown in Table 1.

[Table 1]

As shown in Table 1, JIS Z 2911
In the mold test (a), bis (2-pyridylthio) was used for both the molds specified in JIS and MIL.
Zinc-1,1 ^'- Examples 4-7 were blended dioxide
Sponge-like konjac composition has high mold resistance
No mold resistance was observed for the spongy konjac compositions of Examples 1 to 3 containing only-(4-thiazolyl) benzimitazole. In addition, bacteria test (b)
In even-bis (2-pyridylthio) zinc-1,1 ^', particularly for Staphylococcus aureus and Escherichia coli - Antibacterial effect of dioxide blended is large.

As described above, in the mold test (A) according to JIS Z 2911, the sponge-like konjac compositions of Examples 1 to 3 containing only 2- (4-thiazolyl) benzimitazole show good results. However, according to the mold test (c) by the improved agar plate method, Comparative Example 1
No mold resistance was observed at all, whereas 2-
Mold resistance containing (4-thiazolyl) benzimitazole has been observed, and it has been confirmed that a sponge-like konjac composition having an antifungal effect can be obtained by adding only this compound. Was.

Further, from the test results of Examples 6 and 7,
2- (4-thiazolyl) benzimidazole and bis (2-pyridylthio) zinc-1,1 ^'- sponge konjac compositions formulated in combination with both dioxides, best antimicrobial, possible to obtain the antifungal effect There was found.

[0023] In the above embodiment, as examples of the compounds to be blended in the present invention, 2- (4-thiazolyl) benzimidazole and bis (2-Birijiruchio) zinc -1,1 ^'- When using dioxide However, when the compounds (A) and (B) represented by the general formulas (1) and (2) are used, the obtained mold resistance and bacterial resistance are almost the same as those in the above-mentioned Examples shown in Table 1. It was confirmed that the same effect was exhibited.

[0024]

As described above, the sponge-like konjac composition of the present invention has excellent resistance to fungi and bacteria. No water is generated or the contained water is spoiled by bacteria to give off a bad smell, so that it can be always used in a sanitary condition. Further, the sponge-like konjac composition of the present invention does not cause irritation to the skin and is extremely practical which can be safely used as a cleaning tool or the like.

Claims (1)

(57) [Claims] 1. A porous material obtained by freezing, thawing and drying konjac, wherein the following (A) compound 0.05 to 3.0
Parts by weight and / or the following compound (B) 0.1 to
A sponge-like konjac composition characterized by containing 5.0 parts by weight. (A) A compound represented by the following general formula (1). Embedded image (Where R ₁ is hydrogen or —NHCONH (CH ₂ )
₃ CH ₃ group, R ₂ is a thiazolyl group or —NHC00C
(B represents a H ₃ group) (B) A compound represented by the following general formula (2). Embedded image (Where M is a monovalent and divalent metal atom, and n is 1 or 2)