JPH0753753Y2 - Antibacterial component - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention <Industrial Application Field> The present invention is an apparatus for supplying and processing a liquid, for example, a beverage automatic vending apparatus, an industrial manufacturing apparatus such as a pure water or ultrapure water manufacturing apparatus, a sugar solution or a medicinal and pharmaceutical solution manufacturing apparatus. The present invention relates to an antibacterial constituent member such as a device.

<Prior Art> Conventionally, various synthetic resins are often used as materials for tanks, pipes, valves and the like, which are constituent members of devices for supplying and processing liquid. However, while synthetic resins have various advantages (inexpensive, moldability, light weight, etc.), microorganisms such as bacteria and fungi propagate and the resulting contamination is a problem. In particular, it is an urgent problem in beverages or beverage automatic vending apparatuses and pure water or ultrapure water production apparatuses.In beverage automatic selling apparatuses, beverage stock solution and tap water, which is diluted water, are stored or added for a long time. Since it is stored warm, chlorine for sterilization is scattered and disappears in the atmosphere, and it is in a state susceptible to microbial growth and contamination.

In addition, when chlorine for sterilization is removed with activated carbon from the viewpoint of taste of the beverage, microorganisms rapidly propagate and contaminate when the beverage stagnates, especially when reverse contamination of bacteria from the outlet of the beverage occurs. Contamination will increase further.

Further, in a pure water or ultrapure water production apparatus, even if a minute amount of microorganisms are generated, there is a serious problem such as contamination of products (pharmaceuticals, semiconductors, etc.) using pure water or ultrapure water, and reduction of stagnation. It becomes a problem.

Conventionally, as countermeasures for these problems, the constituent members of the apparatus are removed for cleaning, but as the contamination increases, the number of times of cleaning increases, resulting in much time, labor, and cost for maintenance of the apparatus. . Especially when it is necessary to dismantle the device and clean the components (strainer, collector, nozzle, etc.), it becomes more difficult to maintain and manage the device.

In addition, chemicals of organic compounds (PCP, PCMX, etc.) are sometimes used for sterilization and killing and destroying fungal microorganisms, but when the device handles beverages and foods, there is a problem of toxicity. However, when the purity of the liquid becomes a problem (medical water, semiconductor manufacturing water), it may cause impurities to increase.

<Problems to be Solved by the Invention> The present invention provides an antibacterial property to a synthetic resin used as a constituent member of a device for supplying and treating a liquid, and contaminates the constituent member and the liquid with microorganisms such as bacteria and fungi for a long time. It is to prevent it steadily.

B. Configuration of the Invention <Means for Solving the Problems> In the present invention, the above-mentioned drawbacks of the synthetic resin used for the constituent members of the device for supplying and treating the liquid are improved, and heavy metal ions having antibacterial properties are adsorbed. It is characterized in that the constituent members of the device that supplies and processes the liquid are manufactured by a special material that is formed by adding the mixed ion-exchange resin to the synthetic resin and mixing it.

Hereinafter, an example of implementation of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a synthetic resin, and a pipe 3 made of a material having an antibacterial property formed by adding and mixing an ion exchange resin 2 in which heavy metal ions are adsorbed to the synthetic resin 1. The pipe 3 made of the held material is used as a constituent member of a device for supplying and processing a liquid.

The heavy metal ions are adsorbed on the ion exchange resin 2 by a so-called known ion exchange method in which the heavy metal ion aqueous solution is passed through the ion exchange resin 2.

It is known that heavy metal ions have antibacterial properties (bactericidal properties), but on the other hand it is also a fact that their toxicity poses a problem. It is an important point to control.

Even if the heavy metal ions are adsorbed and retained on the ion exchange resin 2, when they come into contact with water containing salts such as tap water, the heavy metal ions are liberated in a short time due to an ion exchange reaction with the salts in the water. However, it is difficult to hold heavy metal ions in the ion exchange resin 2 for a long time.

Therefore, as a result of studying the retention of the heavy metal ions, the present inventor has found that the heavy metal ions are adsorbed to the ion exchange resin 2 and then added to the synthetic resin and mixed to form a heavy metal ion, that is, an antibacterial property. The present invention was made paying attention to the fact that it can be retained for a long period of time.

The mixing ratio of the ion exchange resin 2 adsorbing heavy metal ions and the synthetic resin varies depending on the type of the synthetic resin 1 to be mixed and the purpose of use of the molded material 3, but generally the ion exchange resin 2 is 2 to 20. %, When mixed and molded, the molded material 3 shows a moderate antibacterial property (its retention),
Does not affect physical strength.

If the ion exchange resin 2 is added and the mixing ratio is less than 2%,
The molded material 3 is not preferable because the antibacterial property is lowered, and when it exceeds 20%, the antibacterial property is increased but the physical strength is weakened.

Molding of the ion-exchange resin 2 having the heavy metal ions adsorbed thereon and the synthetic resin may be performed using a known resin molding machine under known molding conditions, and the description thereof is omitted here.

There are various synthetic resins 1 used in the present invention, but from the viewpoint of retaining antibacterial properties, polyethylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyamide, polycarbonate, polysulfone,
Epoxy resin, melamine, acrylic resin, acrylonitrile-butadiene-styrene resin (ABS), phenol, fluorine, urea resin, nylon, synthetic rubber and the like are preferable.

These synthetic resins are easy to uniformly add and mix with the ion exchange resin if they are powdery or fine particles, but in addition to this, pellets or any other shape can be added as long as they can be uniformly added to and mixed with the ion exchange resin. It doesn't matter.

As the ion exchange resin 2, a strongly acidic or weakly acidic cation exchange resin or a chelate resin is used, but the ion exchange resin is more suitable. Ion-exchange resins have a larger ion-exchange capacity than zeolite and can increase the adsorption and retention of heavy metal ions (the addition to the synthetic resin is small). In addition to being excellent in acid resistance and alkali resistance, it has high transparency when added to a synthetic resin and molded (it becomes opaque in the case of zeolite), and the specific gravity of ion exchange resin is smaller than that of zeolite. It is possible to reduce the increase in weight of the constituent members. These ion exchange resins 2 adsorb and hold antibacterial heavy metal ions such as one or more of silver, copper, zinc and tin ions.

The types of the ion exchange resin 2 and the heavy metal ions, the adsorption and retention amount of the heavy metal ions on the ion exchange resin 2, and the like are appropriately selected according to the intended use of the constituent members of the apparatus using the same.

If the ion exchange resin 2 is in the form of powder or fine particles,
This is convenient for uniform addition and mixing with a synthetic resin, but ordinary particles may be used.

Typical examples of the apparatus for supplying and treating a liquid using the material 3 of the present invention as a constituent member include beverage or food vending apparatuses, various industrial water producing apparatuses such as pure water or ultrapure water producing apparatuses, and the like. However, in addition to water, any device may be used as long as it supplies and processes a liquid such as a sugar solution and a medicinal and pharmaceutical solution.

The components of these devices include a tank and a liquid collection / delivery mechanism attached to the inside of the tank (a dust viewer, a collector, a strainer, etc.), a support such as an eye plate and a screen, a fixing material for a filtration membrane, and a straightening plate. In addition to these, there are pipes, tubes, valves, nozzles, various measuring instruments, and the like, but not limited to these as long as they are constituent members of the device.

<Operation> When a component member of an apparatus for supplying and treating a liquid is manufactured with a material 3 formed by adding and mixing an ion exchange resin 2 having heavy metal ions adsorbed to a synthetic resin 1, a synthetic resin is produced from the ion exchange resin 2. 1, the heavy metal ions gradually elute on the surface of the constituent member, and the heavy metal ion causes a state of having antibacterial properties. In order to maintain this state for a long time, the liquid that comes into contact with and adheres to the surface of the constituent member Kills microbes such as bacteria and turnips.

Further, the heavy metal ions eluted on the surfaces of the constituent members gradually flow out into the liquid flowing through the constituent members of the device, and kill the microorganisms in the liquid.

C. Effect of the Invention When the constituent members of the device for supplying and processing a liquid are manufactured by the material of the present invention, the composition of the material varies depending on the amount of microorganisms such as bacteria and molds in the liquid and the liquid passing conditions. The antibacterial property of the member is maintained for 2 months to 1 year, it is not contaminated by microorganisms, there is no need to wash the constituent members during this period, and there is an advantage that time, labor and cost are not required for maintenance of the device. .

Heavy metal ions are retained in the internal structure of the ion exchange resin and gradually elute through the synthetic resin (do not elute at once)
Therefore, the antibacterial effect is always stable, odorless and nontoxic,
Moreover, the effect is heat resistance (heat resistant temperature of ion exchange resin),
It is also acid and alkali resistant.

[Brief description of drawings]

The drawings show the embodiments of the present invention, and are partially enlarged explanatory views of a pipe used as a component of a device for supplying and processing a liquid. 1 ... Synthetic resin 2 ... Ion exchange resin 3 ... Pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C02F 1/50 540 F

Claims (1)

[Scope of utility model registration request] 1. A beverage automatic vending machine using a material formed by adding and mixing 2 to 20% of a strongly acidic or weakly acidic cation exchange resin or a chelate resin, which adsorbs heavy metal ions, to a synthetic resin and mixing them. Industrial water production equipment such as pure water or ultrapure water production equipment, components of equipment that supplies and processes liquids such as sugar solution or medical and pharmaceutical liquid production equipment are formed, and heavy metal ions are eluted into the liquid to prevent bacteria and An antibacterial component of a device that supplies and processes a liquid that kills mold and other microorganisms.