JPH03150122A - Antibacterial container and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain an antibacterial container at a low cost without impairing antibacterial action by a structure wherein the container is made of a plurality of layers, some layer of which contains antibiotics. CONSTITUTION:A container 30 consists of a main body part 21 and a cap part 22, both of which have a double layer structure of an outer layer part 24 and an inner layer part 25. The outer layer part 24 is transparent and made of polypropylene. The inner layer part 25 is made of resin blended with inorganic antibiotics and its thickness is set to be 0.01 - 500 mum. As base resin, polypropylene is used in consideration of the adhesion between the inner and outer layers of the container. Further, as the inorganic antibiotics, antibacterial zeolite, the particle diameter of which is about 0.7 - 1.5 mum and which is prepared by ion-exchanging sodium ion in the crystal structure of zeolite with silver ion, which has antibacterial action, is used. The loading of the antibacterial zeolite is 0.01 - 40 wt.% on the basis of the base resin.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention can prevent fungi, mold, moss, etc. from forming inside the container, migrating to the contents, and multiplying bacteria in the contents. The present invention relates to a container having an antibacterial effect suitable for accommodating beverages, foods, cosmetics, toiletries, medicines, and for cultivating mushrooms such as cymen, enoki, matsutake, and shiitake, and a method for producing the same.

"Prior Art" Beverage containers such as water bottles and water coolers, household items such as plastic buckets, medical containers for contact lens cleaning water and tablets, cosmetic containers for lotions and creams, etc., are used for hygiene reasons. It is desirable to be able to prevent the proliferation of

In addition, in recent years, it has been found that using containers with antibacterial properties for mushroom cultivation increases the yield of mushrooms.

Conventionally, containers having such an antibacterial effect have been provided in which the entire container is made of a resin containing an antibacterial agent. In order to manufacture this antibacterial container, the main body of the container was molded by blow molding with a resin containing an antibacterial agent, and the cap that closed the mouth of the container body was injection molded with a resin containing an antibacterial agent. .

"Problems to be Solved by the Invention" Containers require a certain degree of wall thickness for practical strength. The conventional antibacterial containers have the disadvantage of being very expensive because the entire container is made of resin containing an expensive antibacterial agent.

Furthermore, in the conventional method for manufacturing an antibacterial container, the cap and the main body are manufactured separately, which requires a lot of man-hours to manufacture, which also poses a problem in that the price of the container cannot be reduced.

In addition, there are two types of antibacterial agents: organic and inorganic. Organic antibacterial agents perform their functions by elution or vaporization, so they cannot be used for food purposes under the Food Sanitation Act. Non-leaching inorganic antibacterial agents are used in antibacterial containers for mushroom cultivation. However, when an inorganic antibacterial agent is added to the resin, the transparency of the container is significantly impaired, making it difficult to confirm the growth status of mycelium inside the container and making it difficult to set cultivation conditions according to the growth stage. There was.

A first object of the present invention is to provide an inexpensive antibacterial container without impairing its antibacterial effect.

A second object of the present invention is to provide an antibacterial container that allows the growth of hyphae to be visually checked.

"Means for Solving the Problems J" In the present invention, the container is formed into a plurality of layers, and some of these layers are layers containing an antibacterial agent.
achieved its purpose.

There are organic and inorganic antibacterial agents, but when manufacturing antibacterial containers for mushroom cultivation, it is desirable to use inorganic antibacterial agents that do not elute or vaporize.

Examples of inorganic antibacterial agents include various powders and fine wires of metals with bactericidal effects such as silver, copper, and zinc;
Among them, so-called antibacterial zeolite, in which zeolite supports metal ions having a bactericidal effect, is suitable.

When using an inorganic antibacterial agent such as antibacterial zeolite as an antibacterial agent, the mixing ratio of the antibacterial agent to the base resin should be 0-01~
4 (Iffi) It is desirable to set it to about 11%.

If the blending ratio is less than 0.01%, the antibacterial effect will be insufficient,
If the blending ratio exceeds 40%, it becomes difficult to mold the resulting container.

The antibacterial effect of the container is determined by the fact that the average thickness of the layer containing the antibacterial agent is 0-0.
If it is 1 mi gate or more, it will be fully demonstrated. On the other hand, from the economic point of view, it is desirable that the thickness of the layer containing the antibacterial agent be set to an average of 500 mm or less.

It is desirable that the layer containing the antibacterial agent be provided on the innermost side.

The thicknesses of the other layers of the container are set so as to satisfy the required strength, rigidity, squeezeability, etc. of the container.

When manufacturing this antibacterial container by a coextrusion method as described below, the base resin forming the layer containing the antibacterial agent and the resin forming the other layers may be made of polyethylene (PR), polypropylene (PP), polyamide (PA), polystyrene(
PS), polycarbonate (PC), polyvinyl chloride (
P V C), polyethylene terephthalate (P E
T ), ethylene vinyl alcohol (EVOH), acrylonitrile styrene (SAN), etc. are preferably used.

In addition, when forming the layer containing the antibacterial agent in the antibacterial container by coating as described below, vinyl resin, acrylic resin, epoxy resin, urethane resin, polyester resin, etc. may be used as the base resin.

In this antibacterial container, the outer layer is made of a transparent resin, and the inner layer is made of a resin containing an inorganic antibacterial agent. When a part of the inner layer is removed, a window is formed that allows the inside to be observed from the outside. Therefore, the second objective can be achieved. In this antibacterial container, there are no particular restrictions on the width or the number of parts from which the inner layer is removed.According to the inventor's experiments, even if the ratio of the part from which the inner layer is removed reaches 50% of the surface area of the container, It has been confirmed that the function as an antibacterial container is fully demonstrated. On the other hand, if the proportion of the portion from which the inner layer is removed is less than 0.01%, it is not preferable because it becomes difficult to observe the inside of the container.

Suitable methods for manufacturing the antibacterial container include a coextrusion method and a coating method.

To manufacture an antibacterial container by coextrusion, first a parison made of a resin containing an antibacterial agent and another resin is extruded from an extrusion die, and then a cavity and a cap part that form the main body of the container are formed. The parison is sandwiched between blow molding molds having a cavity for molding, and gas is blown into the parison to inflate it to produce an intermediate product in which the main body and the cap are integrated, and then the cap of this intermediate product is and the main body.

When the antibacterial container is manufactured by coating, after the main body of the container is molded, an antibacterial agent-containing resin liquid is introduced into the container main body, the resin liquid is applied to the inner surface of the main body, and then dried.

"Function" In the antibacterial container of the present invention, since only some of the layers contain an antibacterial agent, the strength of the container can be provided to layers other than the layer containing the antibacterial agent. This allows the layer containing an expensive antibacterial agent to be set to the minimum thickness necessary to exhibit antibacterial effects, and the amount of antibacterial resin used can be reduced.

Resin containing an inorganic antibacterial agent (hereinafter referred to as antibacterial resin) has poor transparency, but in the container of claim 5, part of the inner layer made of this antibacterial resin is removed, so this removed portion The interior of the container can be observed through the transparent outer layer.

Further, in the manufacturing method of claim 6, since the main body and the cap of the container are integrally molded by blow molding, the cap having an antibacterial layer and the main body can be molded at the same time, thereby shortening the manufacturing process. It is possible to reduce the manufacturing cost of the container.

[Example J] Hereinafter, an example of the antibacterial container and manufacturing method of the present invention will be described with reference to the drawings.

(Example 1) FIG. 1 shows a first example of the antibacterial container of the present invention, and reference numeral 30 in the figure indicates the container. This container 30 consists of a main body part 21 and a cap part 22, and the cap part 22 is attached to the main body part 21. Both the main body part 21 and the cap part 22 have a two-layer structure including an outer layer part 24 and an inner layer part 25.

The outer layer 24 of this container 30 is a transparent layer made of polypropylene, and has a thickness of 1.2 layers.

The inner layer 25 of the container 30 is made of resin mixed with an inorganic antibacterial agent, and its thickness is set to about 50 μm on average. The resin forming the inner layer portion 25 is
It is a base resin mixed with an inorganic antibacterial agent (hereinafter referred to as antibacterial resin). Polypropylene is used as the base resin in consideration of the adhesion between the inner and outer layers of the container. Antibacterial zeolite is also used as an inorganic antibacterial agent. The antibacterial zeolite used here has a particle size of 0.7
It has a diameter of about 1.5 μm and is obtained by ion-exchanging the sodium ions in the crystal structure of zeolite with silver ions, which have an antibacterial effect. The blending ratio of this antibacterial zeolite is 5M% based on the base resin.

A window 26 is formed on the side of this container 30. This window 26 is a portion formed only of the transparent outer layer 24, with the inner layer 25 made of antibacterial resin partially removed. It is formed from the mouth 4M to the bottom 42 along the depth direction of the container 30. The area of this window portion 26 is approximately 0% of the entire surface area of the container.

Next, a method of manufacturing this container 30 will be explained. In this manufacturing method, first, as shown in FIG. 2, a parison 2 is extruded from an extrusion die 1, and is sandwiched between blow molding molds 3, and air is blown into the sandwiched parison 2.

As shown in Fig. 3, the extrusion die 1 has a mandrel 11 inserted into the gui head IO.
An inner resin flow path 12 is formed between and the mandocil 11. On the tip side of this die, there is an inner resin flow path 1.
A sub mandrel 14 is provided to surround the die head MO, and an outer resin flow path 13 is defined between the sub mandrel 14 and the die head MO. Further, a blocking tab 15 is provided between the sub mandrel 14 and the mandrel II to block the flow of resin flowing through the inner resin flow path 12.

The outer resin flow path 13 includes an outer layer portion 24 of the container 30.
A transparent polypropylene is supplied to form the Further, the inner resin flow path 12 is supplied with resin that forms the inner layer portion 25 of the container i1ii30.

The parison 2 extruded from the extrusion die 1 is formed of an outer layer 5 made of polypropylene and an inner layer 6 made of antibacterial resin, as shown in FIG. Also, the inner layer 6
is partially removed (hereinafter, this part will be referred to as the removed section 7).

The blow molding mold 3 consists of a left mold 3A and a right mold 3B. Inside the molding die 3, a cavity 8a for molding the main body 21 of the container 30, a cavity 8b for molding the cap 22 of the container 30, and a cavity 8c connecting these are formed. The right mold 3B is provided with a cylinder 9, and a blowing needle 9b is provided so as to be movable forward and backward by a piston 9a disposed inside the cylinder 9.

After the parison 2 is sandwiched between the blow molding molds 3, a blowing needle 9bJL- is inserted into the sandwiched parison 2 and air is blown into the parison 2, thereby forming an intermediate product 20 shown in FIG. This intermediate product 20 has a main body part 21 and a cap part 22 of the container integrated through a connecting part 23. As shown in FIGS. 6 and 7, this intermediate product-20 has two layers, an outer layer portion 24 formed from the outer layer 5 of the parison 2 and an inner layer portion 25 formed from the inner layer 6 of the parison 2. It has a structure. Further, a portion of the inner layer 6 of the parison 2 corresponding to the removed portion 7 is a transparent window portion 26. Further, a ring-shaped locking recess 27 is formed on the inner surface side of the cap portion 22 of this intermediate product 20, and the main body portion 2
On the outer periphery of the opening of 1, there is a protrusion 28 that is engaged with this engagement recess 27.
is formed.

Next, in this manufacturing method, the connecting portion 23 of the intermediate product 20 is cut out. The cutting point is arrow C in the 5th WJ.

As shown by D, it is between the cap part 22 and the connecting part 23 and between the connecting part 23 and the main body part 21. When cut in this way, the cap portion 22 and the main body portion 2 shown in FIG.
An antibacterial container 30 consisting of 1 is obtained.

The container 30 of Example 1 consists of an inner layer portion 25 with a thickness of 50 μm and an outer layer portion 24 with a thickness of 1.2 am, which contain 5% by weight of an antibacterial agent, so that the strength of the container 30 is not impaired. We were able to reduce the amount of antibacterial agents used. Therefore, this container 30 uses a small amount of expensive antibacterial zeolite and can be provided at low cost.

Further, according to the method for manufacturing an antibacterial container of Example 1, the parison 2 having an inner layer 6 made of a resin containing an antibacterial agent and an outer layer 5 covering the inner layer 6 is extruded from an extrusion die 1 and then blow molded. Then, an intermediate product 20 in which the main body part 21 and the cap part 22 are integrated is manufactured.
Since the cap part 22 and the main body part 21 of 0 are separated, a capped container having an inner layer made of a resin containing an antibacterial agent can be manufactured at one time. Therefore, according to the manufacturing method of this embodiment, it is possible to shorten the manufacturing process of an antibacterial container with a cap and to reduce manufacturing costs. Moreover, according to the manufacturing method of this embodiment, the cap part 22 having the antibacterial resin layer on the inner surface can be manufactured at the same time as the main body part 2I, so that the manufacturing cost of the cap part 22 can be significantly reduced.

Furthermore, in the manufacturing method of this embodiment, the parison 2 from which the inner layer 6 has been partially removed is extruded using the extrusion die 1 provided with the blocking tab 15, and this is blow-molded. A container 30 equipped with the following can be manufactured. Therefore, according to this manufacturing method, it is possible to easily manufacture the antibacterial container 30 suitable for mushroom cultivation, which can set cultivation conditions according to the mushroom growth stage by directly visually observing the mycelium growth situation.

(Example 2) FIG. 8 shows another example of the antibacterial container 30 of the present invention.

This antibacterial container 30 is obtained by separating the main body part 21 and the cap part 22 of the intermediate product 20 shown in FIG. The container 30 can be closed by screwing together a screw 31 formed on the outer periphery of the mouth of the main body 21 and a screw 32 formed on the cap 22.

(Example 3) Figures 10 and 12 show the third example of the antibacterial container of the present invention.
This shows an example, and the reference numeral 101 in the figure is the outer layer, and the reference numeral 10 is the outer layer.
2 is the inner layer.

The outer layer is a transparent layer and is made of polypropylene. The thickness of this outer layer 101 is 1.2
■It is set to 1.

The inner layer 102 is made of resin mixed with an inorganic antibacterial agent. The base resin forming the inner layer 102 is polypropylene resin, which has good adhesion to the outer layer 101. Antibacterial zeolite is used as an inorganic antibacterial agent. The antibacterial zeolite used here had a particle size of 0.
It has a molecular weight of about 7 to 1.5 mi, and is obtained by ion-exchanging the sodium ions in the crystal structure of zeolite with silver ions, which have an antibacterial effect. The blending ratio of this antibacterial zeolite is 5% by weight based on the base resin. Also, the inner layer 10
The thickness of No. 2 is set to about 50mm on average.

This inner layer 102 is removed at 2111 places, and these parts are used as window parts 103, 103. Window section 103.1
03 is formed from the mouth 104 to the bottom 105 along the depth direction of the container. Window 10 of this container
3.103 is formed only by the transparent outer layer 101. The area of this window 103.103 is about 10% of the total surface area of the container.

Next, to mold this container, a die shown in FIG. 12 was used. In this die, a mandrel Ill is inserted into a goo head 110, and between the die head 110 and the mandrel 111, a resin flow path (inner layer resin flow path) l l 2 that forms the inner layer 102 of the container is formed. has been done. A sub-mandrel 114 is provided on the tip end side of the die so as to surround the inner layer resin channel 112, and between the sub-mandrel 114 and the goo head 110 is a channel (through which the resin forming the outer layer 1 flows). An outer layer resin flow path) 113 is formed. Also, the sub mandrel 114 and the mandrel 2
1, there is provided a 5° 115 with a blocking tab for blocking the flow of resin flowing through the inner layer resin flow path II2. This blocking tab 115°115 is located at the window portion 103,1 of the container.
It is placed at a position corresponding to 03.

A parison having the cross section shown in FIG. 13 is obtained from this die. This parison consists of an outer layer 121 and an inner layer 122. The inner layer 122 of this parison is cut in two places by the interruption tabs I 1 5, 115 provided on the die.

The cut portions 123, 123 of the inner layer 122 extend along the length of the parison.

The parison thus formed is sandwiched between appropriate blow-molding molds (the same mold as in Example 1), and air is blown into the parison to form the container.

In this container, a portion of the inner layer 102 has been removed, so this portion is formed only of the transparent outer layer 101 and becomes a window portion 103, 103 through which the interior can be viewed. Therefore, when this container is used for mushroom cultivation, the growth status of mycelium within the container can be easily confirmed, and cultivation conditions can be accurately set according to the growth stage.

In addition, this container is formed by an outer layer lot and an inner layer 102, and since the outer layer 101 provides the strength of the container, the inner layer 1 made of expensive antibacterial zeolite
02 can be set to the minimum thickness necessary to exhibit antibacterial action. Therefore, this container can suppress the amount of antibacterial zeolite used and avoid an increase in cost.

In addition, this container has a mouth portion 10 along the depth direction of the container.
The inner layer 102.6 (removed) from the inner layer 102.6 to the bottom 105 can be easily manufactured by blow molding.

Therefore, this container can be provided at low cost also in this respect.

(Example 4) Shimeji mushrooms were produced using the container of Example 3 and the container of Comparative Example 1.2. The results are shown in Table 1.

The container of Comparative Example 1 is a conventional container made of polypropylene resin. The container of Comparative Example 2 differs from that of Example 3 in that the inner layer 102 is formed on the entire inner surface of the outer layer 101 and there is no window 103. Note that the internal volume of the container is 800 cc.

Table 1 1 I Number of cultivation days l Yield 11 Comparative example 1142 days 1 90-1- Comparison *2 M3 flow 120g11 Example 1137 days 1 120
g1 From this result, a part of the inner layer 102 is removed to form the window part 10.
It was confirmed that both the container of Example 3 in which the inner layer 102 was formed and the container of Comparative Example 2 in which the inner layer 102 was formed on the entire surface exhibited the same mushroom production increasing effect.

(Example 5) Anti-l zeolite (Zeomibuku, manufactured by Mitsubishi Corporation)
In order to examine the antibacterial activity of a two-layer container made of a 1.2 mm thick layer of polyethylene laminated on a 50 mm thick layer of polyethylene containing 10% of 4. A section of 8cm×4-8cm was taken and subjected to an antibacterial activity test.

The method of antibacterial activity test is as follows.

0 Test strain Eschericbia coli IF03301
(Colon 1i) SLaphylococcu@au
reus ATCC6538P (Pseudomonas aerugiaosa)
110 P-l (Pseudomonas aeruginosa) Bacillus cereus IFO1349
4 (Cereus li) Aspergillus iiger IFO4407
(Black koji mold) 0 Bacterial count measurement medium For bacteria... SCDLP agar medium (Daigo Nutrient Chemicals) For fungi - CPLP agar medium (Daigo Nutrient Chemicals) After culturing overnight at °C, the culture was directly diluted with 1 part of sterile phosphate buffered saline.

Black koji mold: Potato dextrose agar slant medium at 25℃
After culturing for 7 days, conidia were suspended in sterile 0-055% sodium dioctyl sulfosuccinate to prepare.

Wealth: Dissolve 34 g of monopotassium phosphate in 500 mN purified water, add IN-sodium hydroxide 175- and adjust the pH.
After preparing 7.2, purified water was further added to bring the total amount to 1.
000■r. Physiological saline was added to this solution (5sN) to make 1.000s&.

0 Test procedure A fixed amount of bacterial solution was sprayed onto a sample piece (4.8 x 4.8 cm) after washing with ethanol and stored at 37°C. Save start 0 (
Immediately after spraying), 24 and 48 hours later, the surviving bacteria on the sample pieces were washed out with SCDLP liquid medium (Daigo Nutrient Chemical), and the washed out liquid was cultured using a pour plate culture method (37°C 2 The number of viable bacteria was measured after 1 day) and converted to the number of viable bacteria per sample piece. In addition, after dispensing the same amount of bacterial solution as that sprayed onto the sample piece into a petri dish,
The cells were stored at °C, and the number of viable bacteria was measured immediately and 24.48 hours later as a control.

The results of the above antibacterial activity test are shown in Table 2.

Table 2 Time (br) 1 Test II 10 (immediately after vaccination) l 2
1-12 Escherichia coli blank l 1.6XIO giant,
River + 1”l 1.7Xl@”Ill Main island 1t
-txto l to below IO below 11 yellow
1 blank 15. River 0” l jl, 7xlo”
l 1. ! xlo"11 Grape bulb - Main island 3.9
XlOl 10 or less and O or less■1 Green am Blank I 1.7xlOI 3.7XIO"+ 3.
2xlO”11 Main island 1,) IX
IO and O and below and O and below Station 1 Cereus III 2 Rank l
9.2XIO1,3xlO"l 4.Sx101I
1 Main Island 1 11.3Xl (1 Shi, River @”
I 2. llXIO” 111111 Kabi Lerank l
s, oxto, river o11.7X11111
Main island 6. lIXlOl 10 or less 1
10 or less 1* In the table, the display of ``1O or less J'' is based on the measurement limit and means that no bacteria were detected.

*Measured at fine 111137℃ and true 1127℃.

From the results shown in the table above, it was found that this container had excellent antibacterial activity.

In addition, in the above embodiment, a container with a two-layer structure consisting of an inner layer part and an outer layer part was illustrated, but the antibacterial container ζ of the present invention has three layers.
Containers having a structure of more than one layer, for example, containers in which an adhesive layer or the like is provided between an inner layer and an outer layer, are also included.

Further, in the above embodiment, an antibacterial container for mushroom cultivation was exemplified, but the antibacterial container of the present invention can also be used in other fields, such as antibacterial containers for foods, cosmetics, pharmaceuticals, etc.

"Effects of the Invention" In the container of the present invention, only some of the layers contain an antibacterial agent, so the strength necessary for the container can be obtained from layers other than the antibacterial agent-containing layer. , layers containing expensive antimicrobial agents can be set to the minimum thickness necessary to exhibit antimicrobial activity. Therefore, according to the antibacterial container of the present invention, it is possible to suppress the amount of antibacterial zeolite used and avoid an increase in the cost of the container.

In the antibacterial container according to claim 2, 0.01 to the base resin
Since the antibacterial layer is formed of a resin containing ~40% by weight of an antibacterial agent, the antibacterial agent containing layer contains the necessary and sufficient antibacterial agent to exhibit an antibacterial effect. Therefore, claim 2
According to the antibacterial container, it is possible to suppress the amount of antibacterial agent used without impairing the strength of the container, thereby avoiding an increase in the cost of the container.

In the antibacterial container according to the third aspect, the antibacterial agent-containing layer is formed to have a thickness of 0.01 to 500 mm, which is necessary and sufficient to exhibit an antibacterial effect. Therefore, according to the antibacterial container of claim 3, it is possible to suppress the amount of antibacterial agent used without impairing the strength of the container, thereby avoiding an increase in the cost of the container.

In the antibacterial container according to claim 4, since the antibacterial agent-containing layer is provided on the innermost side, the antibacterial action is directly exerted within the container. Therefore, in this container according to claim 4, it is possible to suppress the amount of antibacterial agent used and avoid an increase in the cost of the container.

The antibacterial container according to claim 5 consists of an outer layer made of a transparent resin and an inner layer made of a resin containing an inorganic antibacterial agent, and a part of the inner layer is removed. The removed portion of the inner layer becomes transparent and becomes a window through which the interior can be visually confirmed. Therefore, according to the container of claim 5, when cultivating mushrooms, it is possible to easily check the growth status of mycelia within the container, and to accurately set cultivation conditions according to the growth stage.

In addition, in the method of manufacturing an antibacterial container according to claim 6, a parison in which a resin containing an antibacterial agent and another resin are laminated is extruded from an extrusion die and blow molded, and the main body part and the cap part are integrated. Since this is a method of manufacturing an intermediate product and then separating the cap and main body of the intermediate product, a container with a cap including a layer made of a resin containing an antibacterial agent can be manufactured all at once. Therefore, according to the manufacturing method of claim 6, the manufacturing process can be shortened and the manufacturing cost of the antibacterial container with a cap can be reduced. Moreover, according to the manufacturing method of claim 6, since the cap having the antibacterial resin layer on the inner surface can be manufactured at the same time as the main body, the manufacturing cost of the cap can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the antibacterial container of the present invention, FIG. 2 is a sectional view showing one step of an embodiment of the method for manufacturing an antibacterial container of the present invention, and FIG. 3 is a sectional view of the same embodiment. FIG. 4 is a cross-sectional view showing the extrusion die used in FIG.
Figure 5 is a sectional view showing the intermediate product obtained in the same example, Figure 6 is an enlarged sectional view of section A in Figure 5, and Figure 7 is 8 in Figure 5.
FIG. 8 is a sectional view showing another example of the antibacterial container; FIG. 9 is a sectional view showing an intermediate product that becomes the same container;
Figure 0 is a partially sectional front view showing the third embodiment of the antibacterial container of the present invention. FIG. 1 is a bottom view of the same embodiment, FIG. 12 is a sectional view showing a die used in manufacturing the container of the same embodiment, and FIG. 13 is a sectional view showing a parlison extruded from the same goo. l-Extrusion die, 2...Parison, 3...Blow molding mold, 5...Outer layer, 6...-Inner layer, 8 m, 8
b...Cavity, 20...Intermediate product, 21...One body part, 22...-Cap part, 24--Outer layer part, 25
- Inner layer part, 26... Window part, 30... - Antibacterial container,
101...-Outer layer, 102... Inner layer, 103... Window part

Claims (6)

[Claims] (1) An antibacterial container that is a blow-molded container consisting of multiple layers, some of which contain an antibacterial agent. (2) The layer containing the antibacterial agent is formed of a base resin mixed with an antibacterial agent, and the amount of the antibacterial agent is 0.01 to 40% by weight based on the base resin. The antibacterial container according to claim 1, characterized in that: (3) The thickness of the layer containing the antibacterial agent is 0.01 to 500μ
The antibacterial container according to claim 1, characterized in that it is m. (4) The antibacterial container according to claim 1, wherein the layer containing the antibacterial agent is provided on the innermost side. (5) Consisting of an outer layer made of a transparent resin and an inner layer made of a resin containing an inorganic antibacterial agent,
Claim 1 characterized in that the inner layer is partially removed.
Antibacterial container as described. (6) A parison made by laminating a resin containing an antibacterial agent and another resin is extruded from an extrusion die, and then the blow molding is equipped with a cavity for forming the main body of the container and a cavity for forming the cap. The parison is sandwiched between molds, and gas is blown into the parison to inflate it to produce an intermediate product in which the main body part and the cap part are integrated, and then the cap part and the main part of this intermediate product are separated,
A method for producing an antibacterial container, comprising producing a capped container having a layer made of a resin containing an antibacterial agent.