JPH03289476A - Antibacterial container - Google Patents

Abstract

PURPOSE:To permit a sanitary retention of a push button of an aerosol container, the passage of spouts, the inner surface of a cap and a mounting cup by forming an antibacterial zeolite-containing coating layer on the passageway through which container contents are dispensed. CONSTITUTION:A spray part 2 of an aerosol container has an antibacterial zeolite-containing coating layer 4 formed on a push button 5 for shooting out fine liquid particles in the form of a spray, the passageway of spouts 6 and 9, the inner surface of a cap 13 and at least one side of a mounting cup 18 of the aerosol container 1. The antibacterial zeolite is obtained by replacing exchangeable ions in the zeolite partly or wholly with antibacterial metal ions and silver, copper and zinc are used to provide the antibacterial metal ions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to antibacterial containers. More specifically, the present invention relates to a container that can suppress the growth of germs in the vicinity of the mouth where food particles tend to adhere and which is easily exposed to air.

[Prior Art] Conventionally, cosmetics and food products have been stored in aerosol containers, tube containers, and the like, so that the contents can be easily taken out little by little. Such containers, especially containers used as food containers, such as aerosol containers and tube containers, need to preserve the stored contents safely and hygienically for a long period of time. In addition, in this case, food particles are likely to adhere to the push button or spout of the aerosol container, or to the inner surface of the cap of the tube container, and since they are exposed to air, hygiene management is particularly important. However, from the viewpoint of sanitary control, there have been no known containers that have been devised to have antibacterial effects.

[Problem 8 to be solved by the invention] When food is stored in an aerosol container or tube container for a long period of time and is repeatedly ejected or pushed out, food particles may enter the passageway of the ejection part or the inner surface of the cap of the tube container. Because of the food residue, bacteria and mold can grow in the passageway of the spouting part and on the inner surface of the cap through food particles, which is undesirable from a sanitary standpoint.

The present invention has been made by focusing on the problems of conventional containers, and aims to improve the hygiene of the push button or spout passage of aerosol containers, the inner surface of the cap of push-out containers, and even the mounting cup of aerosol containers. The purpose of the present invention is to provide an antibacterial container that can be used to preserve the environment.

[Means for Solving the Problems] A first aspect of the present invention provides a passageway for discharging contents,
This is a container equipped with a coating layer containing antibacterial zeolite.

A second aspect of the present invention is a container comprising a main body and a cap member, and a coating layer containing antibacterial zeolite is provided on the inner surface of the cap member.

A third aspect of the invention comprises a main body and a cap member manufactured separately from the main body, the cap member being molded from a plastic material containing antibacterial zeolite.

A fourth aspect of the present invention is an aerosol container in which a mounting cup is provided with a coating layer containing antibacterial zeolite on at least one side.

Note that the cap member referred to in the claims includes not only a normal cap that seals the mouth of a container, but also any cap-shaped member that is formed separately from the main body, such as a nozzle or spout of an aerosol device. .

[Function] When the contents are squirted or discharged from the aerosol container, or when the contents are squeezed out from the extrusion tube, the contents adhere to the passageway and the vicinity of the mouth. Further, when a cap is placed on the container, the contents also adhere to the inner surface of the cap. Furthermore, since the attached contents come into contact with the outside air, germs can adhere to them.

In the container of the present invention, the antibacterial action of the antibacterial zeolite in the coating layer suppresses the propagation of such attached germs. Note that the same coating layer may also be formed on the container body.

Furthermore, when the contents of an aerosol container decrease, the contents may adhere to the inner surface of the mounting cup, or may be exposed to air that has entered the container. In such cases, the action of antibacterial zeolite suppresses the proliferation of bacteria.

When a cap member such as a nozzle or spout of an aerosol device or a closed cap of an extrusion container is molded from a plastic material such as a synthetic resin containing antibacterial zeolite, there is no need to form a coating layer by coating or the like. Therefore, there is an advantage that the number of manufacturing steps for the entire container can be reduced.

[Example] Next, the antibacterial container of the present invention will be explained with reference to the drawings.

FIG. 1 is a front sectional view showing an embodiment of the aerosol container of the present invention, FIG. 2 is a partially cutaway sectional view showing a push button of the aerosol container of the first embodiment of the invention, and FIGS. The figures are a partially cutaway sectional view showing a spout of an aerosol container according to a second embodiment and a third embodiment of the present invention, and a fifth embodiment.
The figure is an enlarged sectional view of part (A) in Figs. 2 to 4 and 8 to 9, Fig. 6 is a sectional view showing the mounting cup of the aerosol container of the present invention, and Fig. 7 is an enlarged sectional view of part (A) in Fig. 6.
B) is an enlarged sectional view, and FIGS. 8 and 9 are front sectional views showing a container and a cap according to a fourth embodiment and a fifth embodiment of the present invention, respectively.

The type and size of the antibacterial container of the present invention are not particularly limited; for example, the push button of an aerosol container (see Figures 1 and 2)
It can be applied to commonly used containers such as spouts (FIGS. 3 and 4), extruded tubes, and other container caps (FIGS. 8 and 9).

The first embodiment shown in FIGS. 1 and 2 has a passage (
3) is provided with a coating layer (4) containing antibacterial zeolite.

Further, FIGS. 3 and 4 show a second embodiment and a third embodiment of the ejection part +2) of the aerosol container (1).

The second embodiment and the third embodiment each have a spouting section (
2) spouts out mousse-like contents (6), (
9), a coating layer (4) containing antibacterial zeolite is provided in the passageway (3).

FIG. 5 shows an enlarged sectional view of part (A) in FIGS. 2 to 9.

The fourth embodiment shown in FIG. 8 is one in which a coating layer (4) is provided on the inner surface of a cap n that is closely screwed onto the threaded part of the mouth of an ordinary container 02) including a tube container. .

In the fifth embodiment shown in FIG. 9, a coating layer (4) is provided on the inner surface of a cap surface with an upper lid (5) that is screwed into the threaded part of the dressing container area.

Further, in FIG. 6, a coating layer (4) is provided on at least one side of the mounting cup of the aerosol container (1).

In particular, there is a push button (5) on the top of the mounting cup.
Alternatively, since food particles ejected from the spouts (6) and (9) tend to adhere, if a coating layer (4) is provided on the upper surface, the proliferation of bacteria, mold, etc. can be effectively prevented.

In addition, in Figures 2 to 4, the upper end of the stem (7)
A coating layer (4) is provided in the passageway (8) of the container 02),
By providing a coating layer (4) on the inside and outside surface of the dressing container 5, a further antibacterial effect can be obtained.

As mentioned above, the push button (5), the spout (6), (9),
Coating layer (4) on the passageway (3) or inner surface of the old cap
In addition to the method of providing push buttons, there is another method in which when molding the push button (5), spouts (6), (9), and cap 0υ, synthetic resin contains antibacterial zeolite and is integrally molded.Push button (5), the spouts (6), (7), and the container cap 01) are made of low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, or the like.

In this case, an effective antibacterial effect can also be obtained. Specifically, the content of antibacterial zeolite in the polyolefin molded article according to the present invention is usually preferably 0.7 to 5% by weight.

The antibacterial zeolite used in the present invention is extremely safe for the human body, exhibits excellent antibacterial effects against various bacteria and molds over a long period of time, and has a temperature of about 550°C.
It also has heat resistance that is stable up to The antibacterial zeolite is obtained by ion-exchanging some or all of the ion-exchangeable ions in the zeolite with antibacterial metal ions.

Examples of ions that can be exchanged in zeolite include sodium ions, calcium ions, potassium ions, magnesium ions, and iron ions.

Specific examples of antibacterial metal ions include metal ions such as silver, copper, and zinc. Further, some of the ion-exchangeable ions in the antibacterial zeolite used in the present invention may be ion-exchanged with ammonium ions. A coating layer containing antibacterial zeolite containing ammonium ions is particularly preferred because it is less likely to change color over time.

When using silver ions as antibacterial metal ions, the content of silver ions in antibacterial zeolite is 0.1 to 15% (
% by weight (hereinafter the same), preferably <0.1 to 5%. Further, when copper ions or zinc ions are used as antibacterial metal ions, the content of copper ions or zinc ions in the antibacterial zeolite is preferably 0.1 to 8%. If the content of antibacterial metal ions is lower than the above range, the antibacterial activity tends to be too small, and if it exceeds the above range, the antibacterial effect remains the same but it becomes economically disadvantageous. Tend.

In addition, when ammonium ions are contained in the antibacterial zeolite, the content of ammonium ions in the antibacterial zeolite is 0.5 to 5%, preferably 0.5 to 2%.
% is appropriate from the viewpoint of effectively preventing the antibacterial zeolite from discoloring.

As the zeolite used for the antibacterial zeolite in the present invention, either natural zeolite or synthetic zeolite can be used.

The zeolite is generally an aluminosilicate with a three-dimensional framework structure, and has the general formula: % formula % (where the wings represent ion exchangeable ions, usually 1
a valent or divalent metal ion, n is the valence of the metal ion,
X and Y represent the molar ratio of metal oxide and silica, respectively, and 2 represents the number of water of crystallization). Specific examples of such zeolites include synthetic zeolites such as A-type zeolite, X-type zeolite, and Y-type zeolite; and natural zeolites such as mordenite, clinoptilolite, chabasite, and erionite.

The ion exchange capacity of these exemplified zeolites is 7 mm/Jt/g for A-type zeolite and 6.0 mmJt/g for X-type zeolite.
4 mm*/g, Y-type zeolite is 5 mm/w/g
, 2.6 meq/g for mordenite, and 2.6 meq/g for clinoptilolite.

Chabasite is 5 milliequivalents/g1 erionite is 3.8
m/g, and both have sufficient capacity for ion exchange with ammonium ions and antibacterial metal ions.

Natural zeolite usually has a particle size of 100 to 2
It is desirable to use a relatively fine mesh of 50 mesh because it has good dispersibility into the coating.

Among these, zeolites with a pore volume of 0.1 cm and 37 g or more are preferred from the viewpoints of good compatibility with the resin in the coating layer, high contact opening with antibacterial metals, and stable antibacterial activity. , but is not limited to this.

Pore volume 0. Examples of zeolites with an IC of 3/g or more include A-type zeolite, X-type zeolite, Y-type zeolite, mordenite, erionite, etc., which have a particle size of 50" or less and a crystallinity of 85% or more among synthetic zeolites. I can do it. In natural zeolite, the particle size is essentially 1O
Examples include clinoptilolite, mordenite, chabasite, etc., which have a crystallinity of an or less and a crystallinity of 60% or more.

In this specification, the pore volume refers to the volume of pores in the zeolite structure, and is based on the B, F, Roberts method (J, Co
11. & Interface 5cIence 23
Volume 266).

An example of the method for producing the antibacterial zeolite used in the present invention will be explained below.

An aqueous solution of salts containing antibacterial metal ions is prepared in advance, and zeolite is brought into contact with a mixed aqueous solution containing antibacterial metal ions (silver ions, copper ions, zinc ions) and, if necessary, ammonium ions. The ion-exchangeable ions in the zeolite are replaced with the antibacterial metal ions. The conditions for contact are that the temperature is 1
0-70°C, preferably 40-60°C, time 3-24°C
The time period is preferably 10 to 24 hours, and the process is batchwise or continuous (e.g. column process). The pH of the mixed aqueous solution is adjusted to 3 to 10, preferably 5 to 7, in order to prevent silver oxides and the like from precipitating on the zeolite surface or into the pores. Further, each ion in the mixed aqueous solution is usually supplied in the form of a salt.

Silver ions include silver nitrate and silver sulfate; copper ions include copper nitrate (1) and copper sulfate; zinc ions include zinc nitrate (1) and zinc sulfate; and ammonium ions include ammonium nitrate, ammonium sulfate, and ammonium acetate. Each is supplied in the form of salt.

The content of antibacterial metal ions and ammonium ions in the zeolite is determined by each ion (salt) a in the mixed aqueous solution.
It can be appropriately controlled by adjusting the degree.

For example, when zeolite contains silver ions and ammonium ions, the ammonium ion concentration in the mixed aqueous solution is 0.85 to 3.1 sol/N%.
By setting the silver ion concentration to 0.002 to 0.15 mol#, the target ammonium ion content can be reduced to 0.
．． 5-5%, and zeolite with a silver ion content of 0.1-5%. In addition, when the zeolite contains copper ions and zinc ions, the copper ion concentration in the mixed aqueous solution is 0.1 to 0.85a+ol.
/N, zinc ion concentration is 0.15-1.2 mol/g
By setting the copper ion content to 0.1 to 8%,
A zeolite having a zinc ion content of 0.1 to 896 can be obtained.

In the present invention, in addition to the above mixed aqueous solution, an aqueous solution containing each antibacterial metal ion alone can be used, and ion exchange can be carried out by sequentially bringing each aqueous solution into contact with zeolite. The concentration of each ion in each aqueous solution can be determined according to the concentration of each ion in the mixed aqueous solution.

Antibacterial zeolite can be obtained by thoroughly washing the ion-exchanged zeolite with water or hot water and then drying it. Such drying is performed at normal pressure of 105 to 115
℃, or 70-90℃ under reduced pressure (1-30 torr)
It is preferable to do so.

As the coating layer used in the antibacterial container of the present invention, an organic polymer compound containing the antibacterial zeolite is used. Can be used without restrictions.

Suitable organic polymer compounds include polyolefins such as polyethylene, polypropylene, and polybutene, polyamides, polyurethanes, polystyrenes, polycarbonates, polyacrylates, vinyl chloride resins, and vinylidene chloride resins.

The coating layer (4) containing antibacterial zeolite is applied to the ejection part (
2 passage (3) or the container □□□ cap (In
There are no particular limitations on the method of providing on the inner surface of the
For example, it can be provided by spraying or painting a paint containing antibacterial zeolite, followed by drying or baking.

Spout part (2) of aerosol container (1) according to the present invention
Passage (3) or cap (It) of container (to)
The content of antibacterial zeolite in the coating layer (4) provided on the inner surface of the container differs depending on the use of these antibacterial containers or the number of bacteria originally existing on the surface. Therefore, it is not possible to make a general decision. However, according to test results, by mixing 1 to 5% of a polymer compound containing 50% of antibacterial zeolite to, for example, polyethylene resin, the thickness of this coating layer (4) can be increased from 1 to 20%.
The spraying part (2) of the aerosol container (1) is
) passage (3) or the cap (11) of the container (to)
), the desired antibacterial effect was achieved. Furthermore, preferably the thickness of the coating layer (4) is 5 to 5.
If it is 50 items, the zeolite particles are exposed on the surface of the coating layer (4) to be formed, so it is considered that a sufficient antibacterial effect can be obtained.

The antibacterial zeolite contained in such a coating layer is 0.
It is preferably 5 to 50%, and 100g of the coating layer
The number of antibacterial zeolite particles dispersed per nX 100 (hereinafter referred to as the number of dispersed particles) is 1 to 11.
000 pieces, preferably adjusted to 12 to 9.500 pieces. The number of antibacterial zeolite particles contained in the coating layer per 100007a2 was determined by scanning electron microscopy analysis. If the number of dispersed particles is less than the above range, antibacterial properties are not imparted, and if it exceeds the above range, antibacterial properties are improved, but there is a tendency to be economically disadvantageous. Furthermore, if the thickness of the coating layer (4) is less than 1, it tends to be difficult to form a uniform film, and if the thickness exceeds 200, the antibacterial zeolite may It is often completely buried,
It was also found that the desired antibacterial properties could not be changed.

Next, the results of antibacterial tests conducted on Examples and Comparative Examples of antibacterial containers are shown below.

■ Sample Sample A1: Spout part of an aerosol container not treated with antibacterial zeolite Sample A2: Cap sample Bl not treated with antibacterial zeolite: Spout part (Bl) and cap of an aerosol container treated with antibacterial zeolite Sample B2: Antibacterial zeolite Processed cap zeolite Processing method: Antibacterial zeolite (2.5% silver
(wt%, same below), Y-type zeolite containing 8% zinc, 1% ammonia; particle size 1.1 cm, pore volume 0.9 cm" 7 g)
85 parts of low density polyethylene containing 20% (parts by weight, same below) Thickness of coating layer: 2oρ Number of antibacterial zeolite particles in coating layer: 7000/
10000an2 ■Test conditions Cut pieces of the ejection part of the examples and comparative examples (10ms+X1
0 mm) and a cut piece of the top of the cap (10 mm x 1
0 mm), 1 ml of bacterial suspension (5 x 103 cells/ml) was dropped, and after culturing at 37°C for 4 hours, the bacterial suspension was washed away with sterilized physiological saline. The number of bacteria in the drained liquid was measured using bacterial liquid test paper (-for sterilization and for Escherichia coli).

■Test result sample General bacteria Escherichia coli Al 7x 1031x 10'A2
1X 104 2X 104Bl 2X
10 5 B2 3
4), it has been found that the inner surface of the passage (3) or the inner surface of the cap (older cap) exhibits excellent antibacterial properties.

Furthermore, a storage test and an odor control test were conducted on the sample.

[Test Example 1] Storage Test A lotion with the following formulation was applied to the inner surface of each spouting part (the inner surface of the passage (3) in 4 and the cap 01 in samples A2 and B2) of the samples A1 and Bl. 20-2 of them
It was left for 3 weeks at a temperature of 2°C. After being left to stand, a fraction was taken from the sample, heated to 50 to 60°C, and the evaporated components were compared with those before being left to stand by gas chromatography.

Results: Components (glycol decomposition products, microbial secretions) that were not included in the original lotions were detected in the lotions applied to samples AI and A2. On the other hand, sample Bl,
There was no change in B2 from what it was before it was left alone.

(Formulation of lotion) Ethanol 6.0 parts di-camphor 0.2 parts Purified water
85.3 parts bentonite 0.3 parts l
, 3-butylene glycol 6.0 parts talc
2.0 parts fragrance
0.2 part [Effect of the invention] The antibacterial container of the present invention is safe for the human body because antibacterial zeolite is provided in the passageway of the spouting part and the inner surface of the container, and also has excellent antibacterial properties due to the antibacterial agent. have. Therefore, it is possible to prevent bacteria and mold from growing on the inner surface for a long period of time. It also has excellent preservability and odor resistance for cosmetics, foods, etc. therefore,
The antibacterial container of the present invention can be suitably used in containers for pharmaceuticals, foods, etc., which require antibacterial properties.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of the aerosol container of the present invention, FIG. 2 is a partially cutaway sectional view showing a push button of the aerosol container of the first embodiment of the invention, and FIGS. The figures are a partially cutaway sectional view showing a spout of an aerosol container according to a second embodiment and a third embodiment of the present invention, and a fifth embodiment.
The figure is an enlarged sectional view of part (A) in Figs. 2 to 4 and 8 to 9, Fig. 6 is a sectional view showing the mounting cup of the aerosol container of the present invention, and Fig. 7 is an enlarged sectional view of part (A) in Fig. 6.
B) is an enlarged sectional view, and FIGS. 8 and 9 are front sectional views showing a container and a cap according to a fourth embodiment and a fifth embodiment of the present invention, respectively. (Main symbols in the drawing) (1): Aerosol container (2): Spout part (3): Passage (4), ■: Coating layer η: Container 01): Cap (G): Mounting cup

Claims (1)

[Scope of Claims] 1. An antibacterial container in which a coating layer containing antibacterial zeolite is provided in a passage for discharging the contents to the outside. 2. An antibacterial container consisting of a main body and a cap member, with a coating layer containing antibacterial zeolite provided on the inner surface of the cap member. 3. An antibacterial container consisting of a main body and a cap member manufactured separately from the main body, the cap member being molded from a plastic material containing antibacterial zeolite. 4. An antibacterial container for aerosol in which a coating layer containing antibacterial zeolite is provided on at least one side of the mounting cup.