JPH08151083A - Fitting container having antibacterial effect - Google Patents

Abstract

PURPOSE: To enhance productivity by dispensing with treatment such as falling sterilization by allowing a silver type inorg. antibacterial agent to be present on the inner wall part positioned at the part above the surface of a liquid of the neck part of a fitting container or bottle. CONSTITUTION: The molding only of a bottle mouth part 1 using PET compounded with 2% of silver zeolite and the preform molding of a bottle main body using a usual PET compd. containing no silver zeolite are simultaneously performed in the same mold by injection molding to obtain a preform 2 which is, in turn, subjected to biaxial stretching blow molding to produce a PET bottle having a wall part 3. A conventional falling sterilizing process wherein after the bottle is filled with content under heating, the bottle is immediately capped to be allowed to fall and sterilizing the bottle from the mouth part thereof to the mouth part top surface thereof are made can be omitted and high speed filling is enabled to dispense with the scaling-up of equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mating container and a photol having an antibacterial effect.

[0002]

2. Description of the Related Art When a beverage or the like is poured into a fitting container, for example, a bottle, a heat sterilization method has been widely used to prevent contamination with bacteria and fungi. That is, the beverage liquid is heated and sterilized before being poured into the bottle, and further sterilization of the inner surface of the bottle is performed while maintaining the temperature at which the liquid has a sterilizing effect to maintain a long-term antibacterial effect. . The antibacterial effect on the inner surface of the bottle up to the liquid injection surface of the bottle can be obtained by injecting the heated liquid into contact with the inner wall of the bottle, but sterilizing the inner wall of the bottle neck located above the liquid surface. Since it does not come into contact with the heating liquid, it cannot be obtained as it is.By capping the bottle for a certain period after capping and bringing the heating liquid into contact with the inner wall of the bottle mouth, a further sufficient antibacterial effect is provided. . The sterilization temperature also varies depending on the beverage, but the following temperatures are used for sterilization of fruit beverages, coffee, black tea, oolong tea, milk beverages, mineral water and the like. For fruit drinks, coffee at 82-85 ° C
The oolong tea is heated to 85 to 90 ° C and the mineral water is heated to 70 to 75 ° C to sterilize the beverage, and the inside of the bottle is also sterilized by pouring into the bottle. Also, for the inner wall surface of the bottle neck, after heating and filling,
Immediately capping and then tumbling the bottle, the neck and mouth tops are treated with boiling water to prevent germs.

[0003]

As described above, the fall sterilization method for preventing bacteria is performed by capping in order to prevent germs on the neck portion which is not reached by the specified amount of the filling liquid which is a medium liquid after heating and filling the bottle as described above. In this method, the inner wall of the neck portion of the bottle is brought into contact with the medium solution heated to the sterilization temperature for a certain period of time by inverting the bottle to sterilize it. Although this method seems to be simple in appearance, it takes 40 to 60 seconds for tipping sterilization, and a complicated control mechanism is required to achieve the timing in general-purpose high-speed automatic filling. is there. The difference in the working time between the liquid injection speed and the fall time is the bottleneck for productivity improvement.
For this reason, it is difficult to improve productivity, and in order to improve this, the equipment must be large, which requires a large amount of investment, which is one of the reasons for the high cost. The present invention provides a technique that does not require fall sterilization when heat-filling a beverage in a typical bottle of a fitting container, and does not perform fall of the container for sterilization. No adjustment is required, high-speed filling is possible, productivity is improved, and cost can be reduced.

[0004]

According to the present invention, by arranging a silver-based inorganic antibacterial agent on the inner wall of the bottle neck located above the liquid level when a prescribed amount of liquid is injected into the bottle,
(EN) A bottle that does not require tip sterilization.
Further, in the present invention, the same effect is exerted even for a fitting container of an appropriate shape filled with a paste-like relatively viscous liquid such as a cosmetic emulsion.

Japanese Patent Laid-Open No. 3-150122 discloses an example in which silver zeolite is mixed with an inner layer material for forming a fitting container such as a plastic bottle. However, in this prior art, a multi-layer fitting container is used for the purpose of antibacterial effect against a medium solution. Whereas a plastic layer containing silver zeolite is provided over the entire inner layer of the present invention, the present invention is a technique of fixing a silver antibacterial agent only on the inner wall surface of the bottle neck for the purpose of eliminating the fall sterilization. However, the arrangement of silver zeolite is different from that of the prior art. When silver zeolite is placed on the entire inner layer of the fitting container as in the prior art, the medium solution is indirectly bonded to the silver zeolite for a long period of time. (1) Elution of silver ions into the medium solution is suitable for FDA beverages. If it exceeds the standard of 50 ppb, it may cause a safety problem as a beverage. (2) Silver ion reacts with protein, salt, and other components of the middle solution that easily react with silver ion, and the antibacterial property is reduced. (3) A compound having a reducing action such as vitamin C,
Although there is a problem in that the antibacterial property is deactivated by coloring with metallic silver when contacted with silver ions, the present invention, unlike the prior art, does not contact the middle solution during storage. Since silver zeolite is used only in the part, the purpose of antibacterial property can be sufficiently achieved, and there is no problem in safety as described above.

Examples of the plastic used in the fitting container such as the bottle of the present invention include general-purpose synthetic resin materials such as PET, PP, PE, nylon, ABS, and polyvinyl chloride, but are not limited thereto. However, it can also be applied to a glass bottle. Further, as the silver-based inorganic antibacterial agent used in the present invention, there are silver zeolite, silver diphosphonium phosphate, silver apatite, silver complex salt and the like, and it is particularly preferable to use silver zeolite whose release amount of silver ions is constant and appropriate. . It is more preferable to use silver zeolite encapsulated with silica in a porous capsule because it is possible to avoid color contamination over time. To fix the silver antibacterial agent, add 0.5 to the material forming the bottle neck.
% To 10%, preferably 1% to 5%, or 0.5% to 10% of silver zeolite can be added to the coating material and applied to the inner wall of the neck by spraying or the like. This can be similarly performed in the case of a fitting container having an appropriate shape when a pasty drink is put therein.

Aspects of the present invention will be specifically described by taking a plastic bottle molding as an example. Only the mouth and neck of the bottle are pre-injection molded using a synthetic resin containing a silver antibacterial agent, and then the preform is molded by injection molding the bottle equivalent part with a normal synthetic resin containing no silver antibacterial agent. Or, mold the mouth and neck of the bottle using a synthetic resin mixed with a silver antibacterial agent using a multi-axis injection molding material, and at the same time use a normal synthetic resin that does not contain a silver antibacterial agent to make the bottle body. You may inject a part and shape a preform at once. The preform is made into a bottle finished product by using a conventional means such as biaxial stretch blow molding. In addition, only the mouth and neck of the bottle are injection-molded in advance, and after spraying the coating material containing silver zeolite on the inner wall of the neck, it is installed in the mold and the bottle body is injection-molded to form the preform. The preform can then be blow molded into a finished bottle.

[0008]

[Example 1] Using PET containing 2% of silver zeolite, only the mouth and neck of a bottle are molded, and the PET bottle body of a normal composition containing no silver zeolite is preform-molded at the same time using the same mold. I went and got a preform. FIG. 1 shows a cross-sectional view of the preform, and FIG. 2 shows a cross-sectional view of the PET bottle in which a PET bottle was manufactured by performing biaxial stretch blow molding using the preform. 100 PET bottles manufactured above and ordinary PET bottles 10
Zero caps were filled with purified water at 70 ° C. and capped. All of them were allowed to stand without falling and stored at room temperature for 3 weeks, and after culturing at 38 ° C. for 24 hours, the number of bacteria in the medium solution was measured. As a result, the normal PET bottle is 100
Although 8% of the books showed growth of 1 to 4 × 10 ³ / ml of general bacteria, no bacteria were found in the medium solution of all PET bottles of the present invention.

[0009]

[Example 2] Using PET mixed with a silver antibacterial agent, the third
As shown, only the bottle mouth or neck 11 was molded. The mouth portion or neck portion was attached to a preform mold of a bottle, and a PET portion 21 of a normal mixture containing no silver antibacterial agent was injection-molded on the lower portion to obtain a preform 2 (a cross-sectional view is shown in FIG. 4). ). Using the preform, biaxial stretch blow molding was performed to manufacture a PET bottle (a cross-sectional view is shown in FIG. 5). 100 PET bottles manufactured as above and 100 normal PET bottles were filled with milk coffee at 85 ° C, capped, and allowed to stand for 3 weeks at room temperature without falling over, and then at 38 ° C After culturing for 24 hours, the number of bacteria in the medium solution was measured. As a result, the normal P
For ET bottles, 10% of 100 bottles have 1-4 x 10 ⁴ /
Although the growth of general bacteria of ml was observed, PE according to the present invention
No bacteria were found in the liquid in the T bottle.

When a coating material containing silver zeolite was applied to the mouth or neck of a general bottle manufactured by a conventional method as shown in FIG. 6, the same result as above was obtained. Further, as shown in FIG. 7, in the case of a general fitting container, the coating material may be similarly applied to the mouth portion near the top surface of the filling material.

[0011]

EFFECTS OF THE INVENTION By arranging a silver-based inorganic antibacterial agent such as silver-based zeolite on the inner wall surface of the bottle neck located above the liquid surface, compared to the conventional fall bactericidal method, the injection speed and fall Since the working time difference of time is not taken into consideration, productivity is improved and there is no need to upsize equipment.

[Brief description of drawings]

FIG. 1 is a preform having a synthetic resin material containing an antibacterial agent of the present invention in an inner wall of a mouth.

FIG. 2 is a bottle manufactured from the preform of FIG.

FIG. 3 Bottle mouth or neck.

FIG. 4 is a preform including a synthetic resin material containing the antibacterial agent of the present invention in a mouth or a neck.

5 is a bottle manufactured from the preform of FIG.

FIG. 6 shows an example in which a coating material is arranged on the mouth or neck of a bottle.

FIG. 7 shows an example in which a coating material is arranged at the mouth of a fitting container.

[Description of sign]

 1. PET bottle neck containing silver zeolite 2. Preform 3. PET bottle wall 11. Bottle neck or mouth 21. PET preform with normal composition 211. PET bottle barrel of normal formulation 110. Coating material 111. Coating material 210. Bottle barrel 220. Container wall

Claims (4)

[Claims] 1. A bactericidal fitting container in which a silver-based inorganic antibacterial agent is disposed on the inner wall of the neck of the fitting container located above the liquid injection surface. 2. The fitting container according to claim 1, wherein the fitting container is made of plastic. 3. The bottle according to claim 1, which is a bottle.
Or the fitting container according to any one of 2 above. 4. The fitting container according to any one of claims 1 to 3, wherein the silver-based inorganic antibacterial agent is silver zeolite appropriately encapsulated in a porous capsule.