JP2740889B2 - Method for producing rubber gloves or rubber finger cots containing antimicrobial agent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a rubber glove or a rubber finger cot containing an inorganic antibacterial agent.

[0002]

2. Description of the Related Art Rubber gloves or rubber finger cots are used for medical purposes or when handling hazardous materials, dirt or filth, or to protect a damaged part when a hand or finger is injured. In particular, when fine work is required, it is preferably used. In order to protect hands and fingers, gloves and finger cots containing an antibacterial agent are strongly demanded. Even in food processing, gloves or finger cots containing an antibacterial agent without side effects are required to prevent food poisoning.

However, gloves and finger cots containing an antibacterial agent are not widely marketed because the antibacterial agent is difficult to mix with rubber. There are two types of antibacterial agents: organic antibacterial agents and inorganic antibacterial agents. Organic antibacterial agents are easy to mix with rubber, but easily ooze out and need to be heated at the time of vulcanization when manufacturing gloves and finger cots. However, at this time, the antibacterial agent is decomposed or volatilized, which is not preferable.
From this viewpoint, it is recommended to use an inorganic antibacterial agent, but the technology of mixing the inorganic antibacterial agent into rubber is insufficient, and gloves containing antibacterial agents or finger cots containing antibacterial agents are not suitable for industrial use. It is the fact that it is not manufactured in Japan.

Japanese Patent Application Laid-Open No. 4-361601 discloses a sanitary glove manufactured from a plastic sheet mixed with a silver ion-containing glass that gradually elutes silver ions. The gloves disclosed here are made of plastic,
It is not based on rubber. From the description of the patent publication, it can be seen that glass has a small particle size, is difficult to mix with glass, and difficult to manufacture gloves.

[0005]

SUMMARY OF THE INVENTION The present invention provides a technique for efficiently mixing an inorganic antibacterial agent into rubber, and a rubber glove or a finger sack containing an antibacterial agent based on the technique. It is intended to provide manufacturing technology.

[0006] In the present invention, natural rubber and synthetic rubber are used. Synthetic rubber is a type of synthetic polymer mainly composed of butadiene, chloroprene, isoprene, or the like.
Natural rubber, on the other hand, is obtained from latex collected from rubber trees. In the production of rubber, it is used as a so-called latex in which a rubber component is dispersed in an emulsion or as a sheet-like raw rubber obtained by adding an acid or the like to the latex and coagulating it. Latex is mainly used for thin products, and raw rubber is mainly used for thick products. Products such as gloves and finger cots often use natural rubber as a raw material due to their properties. Also in the present invention, natural rubber is preferably used.

[0007]

SUMMARY OF THE INVENTION The present invention provides a technique for efficiently mixing an inorganic antibacterial agent with rubber latex, and a rubber glove or rubber finger sack containing an inorganic antibacterial agent based on the technique. It is intended to provide manufacturing technology.

That is, according to the present invention, an antibacterial agent dispersion containing a zeolite-based antibacterial agent and / or a silica gel-based antibacterial agent containing at least one of silver, copper and zinc, a dispersant and water is mixed with rubber latex and stirred. The rubber latex mixture containing the antibacterial agent prepared by the above is immersed in a glove or finger sack mold, and then the mold with the rubber component attached thereto is pulled out of the mixture and dried, and then subjected to a heat treatment after drying. A method for producing a rubber glove or a rubber finger cot containing 0.1 to 3.0% by weight of an antibacterial agent.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, rubber is used in the form of rubber latex or raw rubber, and rubber latex is mainly used for thin materials and raw rubber is mainly used for thick materials. When rubber latex is used, various additives such as a vulcanizing agent, a vulcanization accelerator, an antioxidant, a filler, and a dispersant are added to the rubber latex, and the rubber latex is appropriately processed into a product.

On the other hand, when raw rubber is used, a weak acid is added to the rubber latex to coagulate the rubber component, the coagulated rubber component is taken out into a sheet while being squeezed by a roll, thoroughly pickled, and dried. If necessary, smoke treatment is performed to obtain raw rubber. Then, rubber additives such as a vulcanizing agent, a vulcanization accelerator, an antioxidant, a filler, and a dispersing agent are added to the sheet-like raw rubber, and the resulting raw rubber is put into an appropriate mold, pressed, heated and subjected to a heat treatment. Have gained.

The antimicrobial agent used in the present invention is a zeolite antimicrobial agent and / or a silica gel antimicrobial agent containing at least one of silver, copper and zinc metals as described above. The content of these metals in the zeolite-based antibacterial agent can be changed as required. Specifically, an antibacterial agent “Bakutekira” (trade name) manufactured by Kanebo Kasei Co., Ltd. can be suitably used. "Bactekiller" includes those containing only silver, those containing silver and copper, and those containing silver and zinc. 10% by weight, 30 to 40% by weight of zinc
contains.

This antibacterial agent is used in the case of "Bakutekira" in rubber, gloves or finger cots.
It is used in the range of 1 to 3.0% by weight. When the content is 0.1% by weight or less, the effect as an antibacterial agent is small, and when the content is more than 3.0% by weight, the antibacterial effect is not so large.

As an antibacterial agent, a silica gel antibacterial agent such as "Silwell" (trade name) manufactured by Fuji Silysia Chemical Ltd.
Can also be suitably used. This is an inorganic antibacterial agent in which a silver thiosulfato complex salt is supported on silica gel, and its use amount is 0.1 to 3.0% by weight based on the rubber component in rubber, gloves or finger cots.

The mixing of the antimicrobial agent with the rubber latex requires that the antimicrobial agent be first dispersed in water. For this purpose, various methods are used. It is preferable to add an antibacterial agent together with a dispersant and a stabilizer to water, and pulverize and mix in a ball mill. The dispersion of the antimicrobial agent needs to have the antimicrobial agent dispersed well. To this end, the use of dispersants is essential.
So-called surfactants are preferably used. Although a cationic surfactant, an anionic surfactant and a nonionic surfactant are used, the effect of an anionic surfactant can be expected.
Specifically, naphthalenesulfonate, dodecylbenzenesulfonate, toluenesulfonate and the like are preferably used. As the stabilizer, an alkaline substance such as aqueous ammonia and casein are used. These are used to prevent coagulation of the rubber latex and stabilize the viscosity.

Next, various rubber additives such as a vulcanizing agent, a vulcanization accelerator, an antioxidant, a filler, a dispersant, a thickener, and a stabilizer are added to the rubber latex according to a standard method, and a latex solution is prepared. Is prepared. This latex preparation liquid and the antimicrobial agent dispersion liquid are appropriately mixed and stirred to prepare a rubber latex mixed liquid containing the antimicrobial agent. At this time, the rubber latex liquid
First, an antibacterial agent dispersion is added, and thereafter, other additives such as a vulcanizing agent, a vulcanization accelerator, an antioxidant, a filler, a dispersant, a thickener, and a stabilizer may be added. First, various additives such as a vulcanizing agent, a vulcanization accelerator, an antioxidant, a filler, a dispersant, a thickener, and a stabilizer are added to the latex, and then the antibacterial agent dispersion is added to the latex preparation liquid. A liquid may be added.

There is no particular problem when an antibacterial agent is added to raw rubber, but when an antibacterial agent is added to rubber latex,
There are points to note. Rubber latex generally has the property of coagulating when the pH of the liquid changes. For this reason, rubber latex is usually used after being made slightly alkaline. From this viewpoint, it is not preferable that the antibacterial agent added to the rubber latex changes the pH of the latex. Preferably, a neutral antimicrobial agent is selected.

Next, a glove or finger sack mold is immersed in a latex mixture containing an antibacterial agent, and a rubber component is adhered to the mold. The mold is lifted from the mixture and dried while rotating. At this time, immersion and drying are repeated a plurality of times, if necessary, until the desired thickness is reached. When the desired thickness is reached, after drying, heat treatment is performed at a temperature of 100 to 120 ° C., so-called vulcanization is performed and chlorination is performed to obtain a product.
The rubber gloves referred to herein include not only those manufactured from rubber alone but also rubber gloves with cloth. Gloves with cloth can be similarly manufactured by fitting cloth gloves into a mold and dipping the gloves in rubber latex.

The raw rubber containing an antibacterial agent can be obtained by kneading an ordinary sheet-like raw rubber with an antibacterial agent, a vulcanizing agent and other additives on a roll. Gloves and finger cots can be manufactured by placing the raw rubber in a mold and performing a heat treatment. The heat treatment at this time is performed at a higher temperature and in a shorter time than in the case of rubber latex.

When kneading the antibacterial agent with the raw rubber, the antibacterial agent may be added to the raw rubber and kneaded first, and then various additives for rubber may be further added and kneaded, or the various additives for rubber may be mixed with the raw rubber. May be added and kneaded, and then an antimicrobial agent may be added and kneaded.

[0020]

EXAMPLES In the following examples, "parts" and "%" all indicate "parts by weight" and "% by weight".

1. Preparation of Antimicrobial Agent Dispersion (A) In a ball mill, 20 parts of an antimicrobial agent of Baktekiller BM-102 (trade name, manufactured by Kanebo Kasei Co., Ltd.), 5 parts of dodecylbenzenesulfonic acid, and a stabilizer 10 containing ammonia and casein 10
Parts were added together with 108 parts of water, and pulverized and mixed at room temperature for 5 hours to obtain a dispersion (A) of an antibacterial agent.

2. Preparation of Latex Preparation Solution (B) A 60% natural rubber latex 16 was added to a ball mill.
6.6 parts, vulcanizing agent 0.8 part, vulcanizing aid 0.4 part, vulcanizing accelerator 0.5 part, antioxidant 0.5 part, dispersant 0.01
Parts, thickener 0.6 parts, filler 0.2 parts, stabilizer 0.3 parts and water 2 parts, and pulverized and mixed at room temperature for 3 days,
After aging for 2 days, a natural rubber latex preparation solution (B) was obtained.

[0023] 3. Preparation of antibacterial agent-containing latex mixed solution (C) 10.75 parts of antibacterial agent dispersion (A) was added to natural rubber latex preparation solution (B) prepared above, and the mixture was thoroughly stirred and mixed. 1% of a natural rubber latex mixed solution (C) containing an antibacterial agent was prepared. This liquid
Stirring was continued to maintain good mixing.

4. Manufacture of gloves (1) Rubber gloves were manufactured using the natural rubber latex mixed solution containing an antibacterial agent prepared in 3 (C). Mixed liquid (C)
A glove mold was immersed in the mold, and rubber was adhered to the mold. Thereafter, the mold was pulled up and rotated, and dried while sending warm air. This operation was repeated twice to obtain a rubber having a thickness of about 0.3 mm. The rubber-attached glove was placed in a vulcanizer and heated at 115 ° C. for about 10 minutes. The heat-treated product was chlorinated to obtain a rubber glove product.

[5] Manufacture of finger sack (1) In the same manner as in 4, by changing the amount of the antibacterial agent dispersion liquid (A) added to the natural rubber latex preparation liquid (B), those having different antibacterial agent contents, that is, antibacterial agents 0.2%, 0.
A finger sack product containing 3%, 0.5% and 2% was obtained.

6. Manufacture of gloves (Comparative Example)
To 0 parts, 1 part of "Sillwell" B03 (trade name, manufactured by Fuji Silysia Chemical Ltd.) was added as an antibacterial agent and kneaded. Thereafter, 3 parts of a vulcanizing agent, 1.5 parts by weight of a vulcanization accelerator, 0.5 part of an antioxidant, and 3.5 parts of a filler were added and kneaded to obtain a rubber sheet for processing. The antibacterial agent-containing rubber sheet thus obtained was put into a glove mold, pressed, and heated at a temperature of 150 ° C. for about 5 minutes to obtain a glove product.

7. Manufacture of finger cot (2) 40% NBR rubber latex 25 in ball mill
0 parts and a vulcanizing agent 0.5 parts, a vulcanization aid 5.0 parts, a vulcanization accelerator 1.0 part, a dispersant 0.015 parts, a filler 1.0, a stabilizer 7.0 parts and water 13 parts were added, and the mixture was pulverized and mixed at room temperature for 3 days, and then aged for 2 days to obtain an NBR rubber latex preparation liquid (D). This NBR rubber latex preparation liquid (D) is added to the antibacterial agent dispersion liquid (A)
0.75 parts was added and mixed well by stirring to prepare an NBR rubber latex mixed solution containing an antibacterial agent containing 1% of the antibacterial agent with respect to the rubber component. A finger-sack mold was dipped in the mixed solution containing the antibacterial agent, and rubber was adhered to the mold. Thereafter, the mold was pulled up and rotated, and dried while sending hot air. This operation was repeated twice to obtain a rubber having a thickness of about 0.3 mm. The rubber-attached finger sack was placed in a vulcanizing can and 115
C. for about 10 minutes. The heat-treated product was chlorinated to obtain a finger cot product.

8. Measurement of antibacterial effect (1) The rubber glove product obtained in 4 was cut into a size of about 5 cm square, and an antibacterial test was performed based on this small piece to measure the antibacterial effect. As shown in Table 1, after 24 hours, almost no Escherichia coli or staphylococci were recognized, and the antibacterial effect of the rubber glove containing the antibacterial agent was recognized. The test method is as follows.

[0029]

[Table 1]

Test method: Each cell was cultured on a normal agar medium at 37
After culturing at 24 ° C. for 18 to 24 hours, the cells were suspended in a one-hundredth-concentration ordinary broth medium to give about 100,000 CFU /
ml. 0.5 microgram of test bacterial solution on sample
After dropwise addition, the solution is stored at 37 ° C. for 4 hours and 24 hours under humidified conditions. After storage, the dropped bacterial solution was sucked up with a dropper, and the number of viable bacteria in this solution was measured by a pour plate culture method (37 ° C., 1 day) using an ordinary agar medium, and expressed as a CUF value per ml. . Here, the CFU value is a colony formation unit. In addition, Escherichia coli is Escherichia coli I
FO 3301, Staphylococcus, Staphyloco
ccus aureus ATCC 6538P.

9. Measurement of antibacterial effect (2) A 3 cm square test piece was cut from the antibacterial agent-containing finger sack manufactured in 5 and an antibacterial test was performed based on the cut piece. Table 2
As shown in the figure, after 24 hours, almost no Escherichia coli or staphylococci were observed, and the antibacterial effect of the finger cot containing the antibacterial agent was observed. The test method is as follows.

[0032]

[Table 2]

Test method: About 15 ml of an agar medium for bacteria is dispensed into a sterile petri dish. After solidification of the agar, about 5 ml of an agar medium containing the bacterial solution of the test bacteria is overlaid. The specimen was attached to the center of the medium, covered, and cultured at 37 ° C. for 24 hours to observe the state of the bacteria. The bacteria used were E. coli Escheri.
chia coli IFO 3301 and Staphylococcus S
taphylococcus aureus ATCC
6538P.

[0034]

The rubber having antibacterial properties of the present invention is a raw material for products used in fields where antibacterial properties are required. In addition, the rubber glove or rubber finger cot of the present invention has an action of sterilizing bacteria and the like adhering to the glove or finger cot, reduces the risk of food poisoning in food processing, and is useful in the medical field. In addition, it can prevent bacterial infection, prevent contamination by bacteria even when handling unclean materials, and prevent bacterial contamination caused by wounds even when a hand or finger has a wound. The effect can be expected.

Claims (1)

(57) [Claims] 1. A zeolite antibacterial agent and / or a silica gel antibacterial agent containing at least one of silver, copper and zinc,
An antibacterial agent dispersion obtained by mixing a dispersant and water is immersed in a rubber latex mixture containing an antibacterial agent prepared by mixing and stirring with rubber latex, and a glove or finger-sack mold is immersed therein.
Thereafter, the mold having the rubber component attached thereto is pulled up from the mixed liquid and dried, and then subjected to a heat treatment after drying,
Method for producing rubber gloves or rubber finger cots containing 0.1 to 3.0% by weight of antibacterial agent