JPH0669408B2 - Tooth brush - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention uses at least an antibacterial resin obtained by mixing antibacterial ceramics in which antibacterial metal ions are supported on ceramics and kneading the resin. The present invention relates to an antibacterial toothbrush having a brush portion or a handle portion.

[Problems to be Solved by Prior Art and Invention]

A toothbrush consists of a resin or animal brush part for brushing teeth and a resin or other handle part for avoiding it.
Used daily in the oral cavity to brush teeth. However, toothbrushes are usually handled relatively crudely, and bacteria and mold are liable to propagate. Using a toothbrush in which bacteria and mold have propagated is not preferable in terms of hygiene because it introduces bacteria and mold into the oral cavity from the outside, rather than cleaning the oral cavity. For this reason, it is desirable to keep the toothbrush clean so that bacteria and mold do not propagate. As one of the methods, it is considered that the toothbrush holds an antibacterial agent to prevent the growth of bacteria and mold. However, conventional antibacterial agents have few substances exhibiting a wide range of antibacterial spectrum, and most of them are organic substances, so that they have low heat resistance and, when kneaded into a resin, they decompose during molding and do not exhibit antibacterial properties. On the other hand, some antibacterial agents containing inorganic compounds show strong antibacterial properties,
It cannot be used due to its narrow antibacterial spectrum, solubility in water and strong toxicity. For this reason, toothbrushes that do not breed bacteria and mold are not commercially available. We mix and knead metal ion-supporting ceramics, in which metal ions selected from silver, copper, zinc, and mixtures thereof, which are harmless to the human body and exhibit a broad antibacterial spectrum, into a resin as an antibacterial agent. It was confirmed that by making a toothbrush using the toothbrush, a toothbrush that does not reproduce bacteria and mold can be obtained. The present invention provides an antibacterial toothbrush using a resin which is prepared by mixing and kneading a metal ion-carrying ceramics antibacterial agent that does not propagate bacteria and mold into the resin.

[Means for Solving the Problems]

Aqueous solution of metal salt of silver, copper, zinc and their mixture is made of porous ceramics, namely zeolite, fluorite group, calykstone, molecular sieve, palm chit, hydroxyapatite, montmorillonite, acid clay, activated alumina, silica gel, diatomaceous earth. By adsorbing or carrying metal ions on these ceramics by treatment with, etc., metal ions can be dispersed homogeneously with any organic material without impairing the antibacterial properties of these metals, and the antibacterial properties are not lost by heating. Ceramics can be easily obtained.
Especially when using zeolite, fluorite group, molecular sieve, palm chit, hydroxyapatite and calyk stone as ceramics, since these ceramics have ion exchange ability, ion exchange with these metals occurs and metal ions are firmly retained. In addition, it is difficult to adsorb anions of metal salts. Therefore, it is less susceptible to the influence of anions. Therefore, using these inorganic ion exchangers as ceramics enhances safety,
It is preferable because the antibacterial effect is maintained for a longer period of time. Adsorption or ion exchange of metal salts to these ceramics can be easily carried out by a conventional method. The amount of supported metal ions depends on the ceramics used, the type of metal salt, the concentration of the metal salt aqueous solution used, and the treatment. It can be arbitrarily selected depending on temperature and time, and the supported metal ion can be easily determined by an analysis by a conventional method. The metal ion-supported ceramics carrying the metal ions thus obtained are dried,
The metal ion-supported ceramic antibacterial agent can be easily kneaded into the resin molded product by pulverizing and uniformly mixing with resin pellets or powder and extrusion or injection molding according to a conventional method. The metal ion-supported ceramic antibacterial agent to be kneaded is desired to be as fine particles as possible, preferably 80 μm or less, and more preferably around 30 μm. The content is not particularly limited, but sufficient antibacterial properties can be obtained if the content is 10% or less, or 0.5 to 6%. In order for the molding resin to exhibit an antibacterial action, it is not necessary to uniformly disperse the ceramic antibacterial agent inside the resin, and it is sufficient to disperse the antibacterial agent on the surface of the molding resin. Rather than uniformly mixing and kneading the metal ion-supported ceramic antibacterial agent, a centrifugal force is applied during the molding of the antibacterial agent and the resin mixture to forcibly disperse the antibacterial agent on the surface of the molded article;
A resin sheet containing the antibacterial agent is bonded to a resin molded product as a base material; a curable coating material containing the antibacterial agent is applied to the base material molded product. It is also possible to reduce the amount used. Thus, the target toothbrush can be easily obtained by molding the brush portion and the handle portion, in which the metal ion-supporting ceramics antibacterial agent is mixed and kneaded or coated, into a toothbrush by a conventional method. The metal ion-supported ceramic antibacterial agent used is harmless to the human body, has a broad antibacterial spectrum, and can withstand any treatment method, and is therefore easily processed. For this reason, if toothpaste, chewing gum, and other substances used in the oral cavity contain a metal ion-supporting ceramic antibacterial agent, the preservability of these substances is improved, and in addition to keeping the oral cavity clean during use, it causes caries and periodontitis. It also has the advantage of acting effectively in prevention and treatment.

[Action]

Since the resin of the present invention is obtained by mixing and kneading the metal ion-supporting ceramics with the resin, the resin itself has antibacterial properties, and the toothbrush made by using the resin loses its antibacterial activity when the toothbrush is produced. This is preferable from the viewpoint of hygiene, since bacteria and mold do not propagate on the toothbrush even if rough treatment is performed and a clean state is always maintained.

Specific examples will be described below with reference to examples.

Example 1. Hydroxyapatite was treated with an aqueous solution of an equal mixture of silver and zinc salts at room temperature.After drying the hydroxyapatite, it was finely pulverized to 30 μ or less, and 2 g of fine powder was homogenized to 98 g of acrylonitrile-styrene resin pellets. After stirring, the sheet was prepared by injection molding, and its antibacterial property was measured and the following results were obtained.

Changes in bacterial name elapsed time and viable cell count 0 hours 24 hours later Escherichia coli 2.3 * 10 ⁵ 10 or less Staphylococcus 2.3 * 10 ⁵ 10 or less Salmonella 4.5 * 10 ⁴ 100 Vibrio parahaemolyticus 1.7 * 10 ⁴ 10 or less Gram-positive cocci 3.1 * 10 ⁴ 10 or less Streptococcus 1.0 * 10 ⁴ 10 or less Example 2. Using copper instead of zinc and zeolite instead of hydroxyapatite, and treating in the same manner as in Example 1 to obtain 1 g of dried and finely ground fine powder. Nylon resin pellets were mixed with 99 g to prepare a sheet by extrusion molding, and its antibacterial activity was measured.

Metal ion-supported ceramics antibacterial agent (containing silver and copper) 1%
Addition, antibacterial effect of nylon resin Change in bacterial name elapsed time and viable cell count 0 hours 24 hours later Escherichia coli 5.1 * 10 ⁴ 10 or less Staphylococcus 7.2 * 10 ⁴ 10 or less Pseudomonas aeruginosa 1.0 * 10 ⁵ 10 or less Cereus 2.8 * 10 ⁴ 1.6 * 10 ² Gram-positive bacteria 2.2 * 10 ⁴ 10 or less Streptococcus 5.4 * 10 ⁴ 10 or less Example 3. Grained hydroxyapatite supporting silver and zinc ion 7: 3 weight ratio 5g with acrylonitrile butadiene styrene The mixture was mixed with 95 g of polymerized resin pellets to prepare a sheet by injection molding, and its antibacterial activity was measured.

Metal ion-supported ceramics antibacterial agent (containing silver and zinc) 5
% Addition, antibacterial effect of ABS resin Change in bacterial name elapsed time and viable cell count 0 hours 24 hours later Escherichia coli 3.6 * 10 ⁴ 10 or less Staphylococcus 1.7 * 10 ⁴ 10 or less Salmonella 8.2 * 10 ⁴ 2.5 * 10 ² Vibrio parahaemolyticus 6.4 * 10 ⁴ 10 or less Example ^4. 10 g of zeolite having equal amounts of silver and zinc ions pulverized to 4.30 μm or less was mixed with 90 g of polypropylene resin pellets and injection-molded to prepare a sheet, and its antibacterial activity was measured.

Metal ion-supported ceramics antibacterial agent (containing silver and zinc) 10
% Addition, antibacterial effect of PP resin Changes in bacterial name elapsed time and viable cell count 0 hours 24 hours later Escherichia coli 9.1 * 10 ⁴ 10 or less Staphylococcus 5.0 * 10 ⁴ 10 or less Salmonella 2.2 * 10 ⁵ 2.3 * 10 ² Vibrio parahaemolyticus 3.4 * 10 ⁴ 5.6 * 10 ² These results indicate that the resin containing the metal ion-supported ceramic antibacterial agent has a strong antibacterial property.

Example 5. A brush 1 is made from the nylon resin obtained in Example 2 and a handle 2 is made from the ABS resin obtained in Example 3, and the brush 1 is planted on the handle 2 to produce a toothbrush by a conventional method. did. The resulting toothbrush is shown in FIG.

〔The invention's effect〕

The resin containing the ions of silver, copper, zinc and a mixture thereof and kneaded with a metal ion-supported ceramic antibacterial agent which is harmless to the human body and kneaded shows strong antibacterial properties, and was prepared using this resin as a raw material. In addition to being safe for the human body, the toothbrush keeps the toothbrush clean in order to suppress the generation of bacteria and mold, and prevents germs from entering the oral cavity through the toothbrush. In addition, because it also shows antibacterial action against oral bacteria such as staphylococci, gram-positive cocci, streptococci,
The use of the toothbrush of the present invention is expected to be effective for the prevention and treatment of tooth decay and periodontal disease.

[Brief description of drawings]

FIG. 1 is a front view of an example of a toothbrush obtained by the method of the present application. 1 ... Brush; 2 ... Handle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 59-191933 (JP, U) Japanese Patent Sho 51-506 (JP, B1)

Claims (2)

[Claims] 1. A toothbrush made of resin, which is obtained by supporting at least one metal ion selected from silver, copper and zinc on ceramics in at least a handle portion or a brush portion of the toothbrush. 0.5% of ceramics to resin
A toothbrush characterized by using an antibacterial resin mixed and kneaded by 6%. 2. The toothbrush according to claim 1, wherein the ceramic is hydroxyapatite.