JPH04242573A - Beverage container - Google Patents

Abstract

PURPOSE:To provide a beverage container which can retain a germfree condition without heating sterilization by making a resin which is formed on the inner surface contain a bactericidal agent by a quantity which is 0.2% or higher of the resin quantity. CONSTITUTION:A resin coating 2 is applied on the inner surface of a main body 1 made of a metal such as aluminum, steel or tin plated, etc., and the resin of the resin coating 2 is a heat curing resin such as an epoxy with an excellent contact property to a metal. Also, as a bactericidal agent, a metal ion such as silver ion, etc., the ion of which is exchanged with an exchange group of an ion exchanger such as synthetic zeolite or ion exchanging resin, etc.; or an inorganic chemical compound on which a metal ion is loaded, and it is an insoluble agent, and is mixed with the resin as corpuscle. As the mixing method, in addition to a method by which the bactericidal agent is directly mixed with the resin in such a manner that the content becomes a specified quantity, a method, in which a resin containing the bactericidal agent is made by mixing the bactericidal agent in the resin by a set quantity which is a specified content or higher, and he resin with the bactericidal agent is mixed with a resin so that a specified quantity of the bactericidal is contained, can be counted.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a container for storing drinking liquid such as natural water or mineral water.
It relates to products whose inner surfaces are made of resin, such as those whose inner surfaces are coated with resin on the main body made of metal (aluminum, tinplate, iron, etc.) or paper, or those made of resin.

0002

[Prior art] For example, natural water and mineral water are
It is necessary to preserve the product in a sterile manner, and the conventional method for this purpose has been to fill a container with natural water or mineral water, seal it, and then heat sterilize it by holding it at 120° C. for a certain period of time.

0003

[Problems to be Solved by the Invention] However, when using the above-mentioned prior art, heating for sterilization changes the composition of dissolved salts in the water and the pH, resulting in a significant change in the flavor of the water. For example, in natural water, 100 to 300
mg of dissolved salts, which are composed of bicarbonate, sulfate, and chloride salts of calcium, magnesium, and sodium. Then, bicarbonate of calcium and magnesium changes to bicarbonate with low solubility, and by heating at 120° C., a portion of the bicarbonate changes to hydroxide in the coexistence of water. Additionally, calcium and magnesium salts that are insolubilized at the same time become precipitates and scales. An object of the present invention is to provide a beverage container that can maintain sterilization without heat sterilization.

0004

A feature of the beverage container according to the present invention is that the resin forming the inner surface contains an antibacterial agent in an amount of 0.2% or more based on the amount of resin.

[0005]

[Action] As is clear from the experimental results described below, the inner surface that comes into contact with the liquid can be made antibacterial, and even if there are bacteria in the liquid, they can be killed by coming into contact with the inner surface, and the proliferation of bacteria can be prevented.

[0006]

[Effects of the Invention] Therefore, according to the present invention, it can be stored in a sterile state without heat sterilization, and is particularly suitable for preserving natural water and mineral water whose composition and pH change due to heating and whose flavor changes significantly. We are now able to provide beverage containers that are Of course, when filling a beverage, it is preferable to fill the liquid through a sterilizing filter.

[0007]

[Embodiment] As shown in Fig. 1, a resin coating 2 is applied to the inner surface of a main body 1 made of metal such as aluminum, iron, or tinplate.
The resin coating 2 contains an antibacterial agent in an amount of 0.2% or more based on the resin amount, preferably 0.
．． It is contained in an amount of 2 to 10%. Also,
The resin of the resin coating 2 is a thermosetting resin such as epoxy that has excellent adhesion to metal. Note that the resin may be a thermoplastic resin such as a vinyl resin. The antibacterial agent is one in which a metal ion such as a silver ion is ion-exchanged with an exchange group of an ion exchanger such as a synthetic zeolite or an ion exchange resin, or an inorganic compound carrying the metal ion, It is insoluble and is mixed into the resin as fine particles. In addition, as a means of mixing the antibacterial agent into the resin, in addition to directly mixing the antibacterial agent into the resin to a predetermined content, there is also a method of mixing the antibacterial agent into the resin in a set amount higher than the predetermined content. An example of this method is to prepare a resin containing an antibacterial agent and mix the antibacterial agent into the resin to contain a predetermined amount of the antibacterial agent.

Next, an experiment conducted by the present inventor to investigate the antibacterial effect will be described. In the experiment, a 180ml aluminum can was used as the main body 1, an epoxy resin was used as the resin coating 2, and fine particles of silver ion exchanged with synthetic zeolite were used as the antibacterial agent, and the antibacterial agent content was 0. %, 0.2%, 1.0%, 5.0
% and 10% were prepared, each of which contained dechlorinated tap water containing E. coli, and the number of E. coli over time was examined. The results are shown in Table 1. Regarding resin coating 2, in order to improve the dispersibility of the antibacterial agent, 20%
A highly concentrated resin solution containing an antibacterial agent was prepared, and this was mixed with a resin solution containing no antibacterial agent to prepare resin solutions of the various concentrations mentioned above, and a curing agent was added to them. Then, they were applied to the inner surface of the can by spraying, and heated at 180℃ and 20℃.
It was formed by heating for several minutes to harden it. Also,
Regarding filling with water, after filling with water, the upper lid was rolled up to seal it.

[0009]

[Table 1]

[Another embodiment] [1] In the above embodiment,
Although the main body 1 is made of metal, the main body may be made of paper. In this case, the resin for the resin coating 2 is preferably a thermoplastic resin such as vinyl resin from the viewpoint of adhesiveness. However, a thermosetting resin may also be used.

[2] In the above embodiment, the container is made up of the main body 1 and the resin coating 2, but the container may be made entirely of resin.

[3] The present invention also covers containers for beverages other than water.

[Brief explanation of the drawing]

[Figure 1] Cross-sectional view

[Explanation of symbols]

1 Subject 2 Resin coating

Claims (1)

[Claims] 1. A beverage container whose inner surface is made of resin, wherein the resin forming the inner surface contains an antibacterial agent in an amount of 0.2% or more based on the amount of the resin.