JPH1143118A - Aseptic filling method for paper container for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To omit a sterilizing process for the internal surface of a paper container by a user's aseptic filling machine by performing the sterilization of the internal surface of the paper container in such a manner that a small amount of a solution of hydrogen peroxide is enveloped in the paper container, and the paper container is immediately sealed, and the paper container is stored for a specified period of time under the sealed state. SOLUTION: In a paper container 1, a small amount of H2 O2 11 is dropped, and a bottom member 7 is sealed to manufacture a sealed paper container 2, and the container is stored in a room to perform the sterilization of the internal surface of the paper container. This sealed paper container 2 is carried into an aseptic chamber of an aseptic filling machine, and an electron beam 12 is cast while the sealed paper container 2 is being rotated, and the external surface of the paper container is sterilized, and then, an easily breakable sealing member 9 on the bottom member 7 is broken by a jig 13 for unsealing, and a filling port 8 is formed, and a filling nozzle 14 is inserted in the filling port 8, and a content 15 is filled. After the completion of the filling, the filling nozzle 14 pulled out from the paper container, and the filling port 8 is sealed with a filling port sealing member 10 to complete the aseptic filling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for aseptically filling a liquid paper container, and more particularly to a method for sterilizing a paper container and a method for aseptically filling the same when filling a liquid container in a metal can substitute paper container in an aseptic state. It is.

[0002]

2. Description of the Related Art Conventionally, metal cans are widely used as containers for fruit juice drinks, coffee drinks, etc. In recent years, paper containers have attracted attention as alternative containers for metal cans from the viewpoint of environmental protection. The quantity has been put to practical use. As the metal can substitute paper container, a container made of a cylindrical paper container and an aluminum lid material is used. The aseptic filling method of the paper container (the container and the contents are separately sterilized and the The following steps are taken as a manufacturing method of filling and sealing the contents below. That is, in the aseptic filling machine, a hydrogen peroxide aqueous solution is sprayed on each of the cylindrical paper container and the aluminum lid member with a two-fluid nozzle, and it is sterilized by hot-air drying. Then, a sterilized aluminum lid member is sealed and sealed in a paper container filled with the liquid content, thereby completing the aseptic filling.

[0003] However, in the above-mentioned aseptic filling process, since the cylindrical paper container and the aluminum lid are individually sterilized with an aqueous hydrogen peroxide solution, a considerable space is required to completely dry the hydrogen peroxide. For example, there is a problem that the size of the apparatus increases. In addition, the aluminum lid material used here is easily deformed, so that it is difficult to transport, and the mechanism of the transport device is complicated. Further, since the sealing of the aluminum lid material is performed in a sterile chamber, the size of the sterile chamber increases. At the same time, the sealing head becomes complicated and the sealing time becomes long, so that there is a limit in improving the processing capacity of the aseptic filling machine.

As a solution to such a problem, the present applicant has already disclosed a method in which a small amount of an aqueous hydrogen peroxide solution is sealed in a liquid paper container as disclosed in Japanese Patent Application Laid-Open No. Hei 8-196251. After sterilizing the inner surface of the liquid paper container, it is carried into an aseptic filling machine, the outer surface of the liquid paper container is sterilized using a mist of hydrogen peroxide solution, and then filled into the paper container in a sterile chamber. There is a method in which an opening is formed, a liquid content is filled from the filling opening, and after filling is completed, the filling opening is sealed with a sealing material to perform aseptic filling.

[0005]

However, even in the above-mentioned aseptic filling method, in order to increase the processing capacity of the aseptic filling machine, a device for generating a mist of a hydrogen peroxide solution for sterilizing the outer surface of a paper container is required. It is necessary to increase the size of the spraying device and the hot-air drying device for mist adhering to the paper container, and the size of the entire aseptic filling device is accordingly increased. The present invention solves these problems by enclosing a small amount of hydrogen peroxide solution inside a liquid paper container, storing the paper container in a sealed state at room temperature, and sterilizing the inner surface of the paper container in advance. Then, the sealed paper container sterilized on the inner surface is carried into the aseptic filling machine, and the outer surface of the paper container is sterilized at a high speed using an electron beam, thereby improving the processing capacity of the aseptic filling device, and further reducing the size and simplification. It is what we are trying to figure out.

[0006]

In order to solve the above problems, the following aseptic filling method is employed. An aseptic filling method for a liquid paper container in which a liquid is filled in a sealed liquid paper container in an aseptic state, wherein a small amount of hydrogen peroxide solution is sealed inside the liquid paper container to clean the inner surface of the liquid paper container. After sterilization, the sealed paper container is carried into the aseptic chamber of the aseptic filling machine, and the outer surface of the sealed paper container is sterilized by irradiating an electron beam, and thereafter, a filling port is formed in the sealed paper container, The aseptic filling method for a liquid paper container is characterized in that the liquid content is filled into the paper container from the filling port, and after the filling is completed, the filling port is sealed with a sealing material.

In another aspect of the present invention, there is provided a method for aseptically filling a sealed liquid paper container with liquid in a liquid paper container. , One opening is closed with a lid made of a laminated paper material in which a spout is perforated and the spout is closed with an easy-open seal, and the other opening is used for filling a liquid. A tubular paper container having a filling port formed therein, the filling port being closed with a bottom material made of a paper laminated material to which an easily breakable sealing member or an easy-to-open sealing member is adhered. After sealing and sealing a small amount of hydrogen peroxide inside the container, sterilizing the inner surface of the tubular paper container, irradiating the outer surface of the sealed paper container with an electron beam to sterilize the outer surface, and then Breaking through the frangible sealing member closing the filling port of the sealed paper container in a sterile chamber Alternatively, the filling port is opened by peeling off the easily-openable sealing member, filling the liquid content into the paper container from the filling port, and sealing the filling port with a sealing material after the filling is completed. The method of aseptic filling of the liquid paper container is a feature.

Further, in the method for aseptically filling a liquid paper container, the liquid paper container is cylindrical, and the outer surface of the paper container is sterilized by irradiating an electron beam while rotating the liquid paper container in a circumferential direction. As a result, the sterilization speed and efficiency of the container are increased, and the aseptic filling method of the liquid paper container is further improved in the processing capacity.

That is, a sealed paper container whose inner surface has been sterilized in advance,
By supplying the inside of the aseptic filling machine and sterilizing the outside of the paper container with an electron beam at a high speed, the sterilization time of the paper container in the aseptic filling machine is greatly reduced, so the processing can be performed without increasing the size of the aseptic filling device. Ability can be improved. Also, for sterilization of the outer surface of the paper container, electron beams were used instead of hydrogen peroxide, and hydrogen peroxide water sterilization was limited only to the sealing member at the filling port, and the amount of hydrogen peroxide used was extremely reduced, It is possible to reduce the size of an exhaust device for hydrogen peroxide gas and a device for treating hydrogen peroxide after exhaustion, reduce environmental pollution due to hydrogen peroxide gas, and improve the working environment.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing a schematic process in the method for aseptically filling a liquid paper container according to the present invention. FIG. 2 is a schematic diagram showing a main part in the aseptic filling method of the liquid paper container of the present invention. FIG. 3 is an explanatory diagram showing the configuration of the lid member. FIG. 4 is an explanatory diagram when H ₂ O ₂ is sealed in a paper container to sterilize the inner surface of the paper container. FIG. 5 is an explanatory diagram showing the configuration of the bottom member. FIG. 6 is a schematic view showing a schematic process of an aseptic filling method of a liquid paper container when an easily-openable sealing material is used as a sealing member for the bottom material.

According to the present invention, a small amount of hydrogen peroxide is sealed and sealed in a paper container, the inner surface of the paper container is sterilized in a sealed state, and the sterilized sealed paper container is supplied to an aseptic filling machine. After sterilizing the outer surface of the paper container with an electron beam, the filling port of the paper container is broken with an opening jig in the aseptic chamber to form a filling port, and the sterilized contents are filled from the filling port. ,
It is characterized by performing aseptic filling by sealing the opening.
Further, when the filling port provided in the bottom material of the paper container is closed with an easy-opening member, after sterilizing the outer surface of the paper container with electron beam irradiation, the easy-opening sealing material is peeled off to open the filling port. And
The sterilized contents are filled from the filling port, and then the filling port is sealed to perform aseptic filling.

The liquid paper container used in the present invention is manufactured as follows. Polyethylene film (hereinafter referred to as PE) / paper / aluminum foil (hereinafter referred to as Al) / P
E or a laminated material obtained by laminating paper such as PE / paper / polyethylene terephthalate film on which silica (SiO _x ) is vapor-deposited (hereinafter referred to as SiO _x vapor-deposited PET) / PE, etc. A cylindrical body is formed by sticking the body by the skive hemming method described above, and one opening of the body sticking cylinder is sealed with a lid member 4, and as shown in FIG. Is prepared.

As shown in FIG. 1A, the lid 4
A hole is provided in a portion serving as the drinking port 5, and the hole (the drinking port 5) is closed by an easily-openable sealing material 6. Lid 4 is same paper laminate and barrel is used, the easy-open sealant 6, laminate of SiO _X evaporation PET and paper can be used. Then, the lid member 4 is placed on the outside (FIG. 1A).
Since PE is also laminated on the lower side, the seal layer of the easy-open seal material 6 is made of a material having an easy-peeling property with respect to the PE outside the lid material 4. It is necessary to seal around the mouth 5 to prevent liquid leakage. Further, by using the SiO _X evaporation PET in peelable sealing material 6, it is added a gas barrier property of the function, can help maintain quality of the contents.

Next, in the cylindrical paper container 1, FIG.
As shown in (b), a solution of hydrogen peroxide (hereinafter H ₂ O ₂₎
) Is dropped several drops. The concentration of H ₂ O ₂ and the amount of dripping are appropriately determined according to the volume of the paper container 1. For example, when the inner volume of the paper container is 250 ml, when the concentration of H ₂ O ₂ is 5%, The amount of the drop is about 2 to 30 μl, preferably 3 to 10 μl.

As described above, in the paper container 1 in which several drops of H ₂ O ₂ are dropped, the bottom material 7 is immediately heat-sealed as shown in FIG. As shown in FIG. 5 (b), the bottom member 7 is provided with a hole in advance at a portion which becomes the filling port 8, and the filling port 8 is provided with the easily breakable sealing material 9 as shown in FIG. 5 (c). It is closed by gluing. The bottom member 7 is made of the same paper laminated material as the trunk portion, but the easily breakable seal material 9 is made of a material that is easily broken, such as PE. In addition, as shown in FIG. 5D, the filling port 8 may be closed by bonding an easily-opening seal material 9a instead of the easily-breakable seal material 9 as shown in FIG. In this case, it is necessary to use a material having an easy-peeling property with respect to PE on the surface of the bottom material as the easily-openable sealing material 9a.

As described above, H ₂ O ₂ is dropped and the bottom material is sealed to seal the paper container (hereinafter referred to as sealed paper container 2).
After being stored at room temperature and sterilizing the inner surface of the paper container, it is supplied to the user and used as a sterile filling container. The sealed paper container 2 is stored at room temperature by a container maker,
As shown in FIG. 1C, H sealed in a sealed paper container 2
₂ O ₂ 11 is vaporized and filled in the paper container, and the sealed paper container 2
Sterilize the inner surface of the.

The sterilizing effect of H ₂ O _{2 on the} sealed paper container 2 is affected by the room temperature at which it is stored. The higher the temperature, the higher the sterilizing effect, and the sterilization is completed in a short time. Usually, if the room temperature is 10 ° C. or higher, a storage period of 3 days or longer is sufficient. If the temperature is 20 ° C. or higher, the sterilization is completed in two days, so that the paper container does not become defective in the normal operation process. However, if the room temperature is extremely low, such as 5 ° C. or lower, it is necessary to pay attention to the bactericidal effect of H ₂ O ₂ .
Preferably, it is better to store at 20 ° C. or more for 2 days or more.

In the step of producing the above-mentioned sterilized sealed paper container 2, the lid 4 is firstly sealed on the body 3 of the tubular body made of the paper laminated material, and H ₂ O ₂ 11 is dropped thereon. , But depending on the convenience of the paper container forming process, the bottom member 7 is first sealed on the body 3 of the cylindrical body, and H
It is also possible to take a step of dropping ₂ O ₂ 11 and then sealing the lid 4.

The sealed paper container 2 may be filled with an inert gas such as helium (He) together with H ₂ O ₂ . By enclosing the inert gas, it is possible to detect pinholes generated during molding of the paper container, sealing of the lid material and the bottom material, or transportation of the sealed paper container. That is, the pinhole of the sealed paper container can be detected by detecting the inert gas leaked from the pinhole using the gas detector.

For example, when helium gas is sealed in a sealed paper container, a helium gas detector detects a helium leak in each sealed paper container before supplying it to the aseptic filling device. The defective container can be detected, and the defective container can be removed in advance before starting the electron beam sterilization step. Therefore, prevents the contents are filled into paper containers of sterilization failure, the failure rate of the aseptic filling products it is possible to minimize the prior art, in a sterile chamber, the container and the lid H ₂ It can be sterilized with O ₂ , dried, and then immediately filled with the contents, which can be made the same as the aseptic filling method.

In the present invention, FIGS. 1 (a) to 1 (c)
Is carried out by a container maker and shipped to a user in the state of a sealed paper container as shown in FIG. 1 (c), during storage at the container maker, during transportation of the sealed paper container, or by the user. During storage of the sealed paper container, the inner surface of the sealed paper container 2 is sterilized. Therefore, the step of sterilizing the inner surface of the container in the user's aseptic filling machine is not required, the portion is simplified, and the entire aseptic filling device can be reduced in size. At the same time, since the outer surface of the paper container can be sterilized at a high speed by the electron beam, the processing capacity of the aseptic filling machine can be improved. In the aseptic filling apparatus, the sterilization step of the container is an important step together with the sterilization step of the contents, which greatly affects the processing capacity of the aseptic filling apparatus and causes the aseptic filling machine to become large.

That is, in order to sterilize the inner surface of the paper container in the aseptic filling device, H ₂ O ₂ is sprayed on the inner surface of the paper container to spray H ₂ O.
Depositing ₂ to the inner surface of the container, it is necessary step such as drying the H ₂ O _2, For this purpose, H ₂ O ₂ supply tank and the supply pipe, a spray device of H ₂ O _2, air drying Equipment, heating equipment for making hot air, dry H ₂ O ₂
A steam exhaust device and an exhaust treatment device for preventing the exhausted H ₂ O ₂ vapor from contaminating the working environment and the atmosphere are required. However, in the present invention, since the sterilization of the inner surface of the paper container is not required, the above facilities are unnecessary,
The size of the aseptic filling device can be reduced.

In the present invention, the sealed paper container sterilized as described above is supplied to a user and used as a container for aseptic filling. The sealed paper container 2 is carried into an aseptic chamber of an aseptic filling machine (not shown),
As shown in (d), the outside of the sealed paper container 2 is sterilized by irradiating the electron beam 12 from the electron beam irradiation device provided in the aseptic filling machine. In the present invention, FIG.
All the steps shown in (g) are performed in a sterile chamber.

In the case of electron beam irradiation, as shown in FIG. 1D, if the electron beam is irradiated while rotating the sealed paper container 2, the surface of the sealed paper container 2 is uniformly irradiated, and sterilization defects are eliminated. . At the same time, it is possible to prevent a part of the paper container from being excessively irradiated with the electron beam, and to prevent the material of the paper container from being deteriorated. FIG. 1 (d) shows a method in which the paper container is set vertically and the electron beam is irradiated from the side. However, even if the paper container is rolled sideways and the electron beam is irradiated from the top and sterilized, The purpose can be achieved.

Electron beam sterilization of the paper container is performed using an electron beam irradiation device. For example, as shown in FIG. 2A, while rotating the sealed paper container 2 in the circumferential direction around the longitudinal axis of the container, an electron beam irradiation device (not shown) applies an electron beam to the side surface of the paper container. 12 so that the side of the paper container is evenly irradiated. In addition, since the upper and lower surfaces of the sealed paper container 2 also need to be sterilized, it is important to assemble the sterilizing device so that the portion is also irradiated with the electron beam.

As the electron beam irradiation apparatus, a low energy type having an acceleration voltage of 200 to 300 keV is usually used. Acceleration voltage exceeding 300 keV, and a medium energy type of 1 MeV or less can be used, but the sterilizing apparatus becomes large in that the electron beam accelerating device and the shielding device are enlarged, and the sterilizing device of the present invention is preferable. Absent. In the present invention, an extremely thin portion of the surface of the sealed paper container may be sterilized.
Those having a voltage of ~ 300 keV are preferred.

In order to sterilize microorganisms attached to a paper container by electron beam irradiation, the absorbed dose on the surface of the paper container varies depending on the degree of contamination of the paper container. In the present invention, the absorbed dose is 5 to 30 kGy (kilo-gray). Used in the range. If the absorbed dose is less than 5 kGy, sterilization may fail if the number of contaminating bacteria is large. Further, when the absorbed dose exceeds 30 kGy, even if the absorbed dose is further increased, excessive sterilization is performed, which is disadvantageous in cost, and in the case of excessive irradiation, the physical properties of the paper container may be reduced,
This may cause defective products due to the occurrence of defective seals. A paper container produced in a normal manufacturing process has a very small number of microorganisms attached to its surface, for example, 250 ml.
In the case of a volume, the number of adherent bacteria is 100 or less, but it is preferable to set the absorbed dose of electron beam to 10 to 20 kGy in consideration of the safety factor.

The sealed paper container 2 whose surface has been sterilized as described above is moved to the next step, and as shown in FIG.
The easily breakable sealing material 9 adhered to the bottom member 7 by the opening jig 13 is broken from the portion of the filling port 8 provided in the bottom member 7 to form the filling port 8. Next, the paper container having the filling port 8 formed therein is moved to a filling step, and the paper container 1 is raised to insert the filling nozzle 14 into the filling port 8 as shown in FIG. The filling nozzle 14 supplies the liquid contents sterilized in another process through a pipe, and according to a known aseptic filling method,
A specified amount of contents 15 is filled. As the contents, liquid drinks such as fruit juice drinks, coffee drinks, and oolong tea are often used. After the contents are filled in the specified amount, the paper container 1 is lowered, the filling nozzle 14 is pulled out from the filling port 8, and the process moves to the next sealing step. When the filling port 8 is formed by breaking the easily breakable seal material 9 adhered to the bottom member 7, the filling port 8 can be broken by a filling nozzle instead of the opening jig 13.
In particular, in the case where the tip of the filling nozzle is thin and the shape is such that the easily breakable sealing material 9 is easily broken, it is preferable to break with the filling nozzle because the step of breaking with the opening jig can be omitted.

In the case of a paper container in which the filling port is closed with an easy-open seal instead of the easily breakable seal, FIG.
As shown in (a) to (d), after the inner surface and outer surface of the paper container are sterilized in the same manner as when the easily breakable sealing material is used, as shown in FIG. Sealing material 9
a is peeled from the bottom material to open a filling port, and a filling nozzle is inserted into the opened filling port to fill the contents as shown in FIG. 6 (f). After the filling is completed, the process moves to the next sealing step in the same manner as when the easily breakable sealing material is used.

In the sealing step, as shown in FIG. 2D, the filling port sealing material 10 sterilized so as to close the filling port 8 is sealed on the surface of the bottom member 7 to seal the paper container. Aseptically filled product and transferred out of the aseptic chamber to complete aseptic filling. As the filling port sealing material 10, a laminated material of silica (SiO _x ) -deposited PET and PE or paper and S
iO _X-deposited PET and PE laminate, or aluminum foil and PE laminate or the like is used. Normally, a paper laminated material in which PE is laminated on the surface is used as the lid material. Therefore, the filling port 8 is sealed by heat sealing the PE of the lid material and the PE of the filling port sealing material 10. As a method of sterilizing the filling port sealing material 10, H ₂ O ₂ is sprayed on the front and back of the filling port sealing material 10, and H
After attaching the ₂ O ₂ mist, a method of drying with hot air and sterilizing can be used.

[0031] As described above, it has been described using a cylindrical paper container for the present invention, the present invention is not limited to the cylindrical paper container, to seal encapsulating a pre-H ₂ O ₂ Accordingly, the aseptic filling method of the present invention can be applied to paper containers of any shape as long as the paper container has a structure in which the inside can be sterilized.

[0032]

Hereinafter, the present invention will be described in more detail with reference to examples. (Example 1) Using a paper laminated material having the following specifications, a cylindrical body was adhered to form a cylindrical body having an inner diameter of 50 mm and a height of 145 mm.
The sticking of the body was performed by the skive hemming method so that the cross section of the paper did not appear on the inner surface of the cylindrical body. Paper laminated material specifications: PE 20 / paper 280g / m ² / PE 30 / SiO _x -PET
12 / LMD / PE 60 The symbols are as follows, the numbers indicate the thickness of the film, and the unit is μm. However, the thickness of the paper is indicated by basis weight (g / m ² ). • PE: polyethylene • PET: polyethylene terephthalate • SiO _x -PET: PET with SiO _x deposited • LMD: Lamination by dry lamination method Hereinafter, the structure of the laminated material shall be indicated as described above.

The lid member 4 was produced as follows. First, using the same paper laminated material as the above-mentioned cylindrical body, this is punched out into a size of 60 mm in diameter as shown in FIG. FIG.
As shown in (a), a hole having a diameter of 10 mm was formed by punching to provide a drinking spout 5. In addition, the easy-open seal material 6
As a result, a laminated material having the following specifications was prepared and punched into a strip shape as shown in FIG. Specification of easy-open seal material: paper 80 / m ² / PE 30 / SiO _x -PET 1
2 / LMD / Sealant 40 As the sealant, a material having an easy peel property with PE of the lid material was used. Next, as shown in FIG. 3 (c), the easy-opening sealing material 6 punched into a shape as shown in FIG. Material 4 was produced.

The lid member 4 manufactured as described above is
As shown in (a), one opening of the tubular body was heat-sealed to obtain a tubular paper container 1. As shown in FIG. 4 (b), 10 μl of 5% H ₂ O ₂ 11 was dropped into this cylindrical paper container 1, and the following bottom material was immediately heated as shown in FIG. 4 (c). Sealing was performed to produce a sealed paper container 2.

As a bottom material, the same paper laminated material as that of the cylindrical body is used, and this is punched into a circular bottom material 7 having a diameter of 60 mm as shown in FIG. 5 (a). To
As shown in FIG.
And a filling port 8 was provided. Next, a PE film having a thickness of 30 μm and a diameter of 60 mm was prepared as the easily-open-breakable sealing material 9, and this PE film was heat-sealed so as to cover the filling port 8 as shown in FIG. A bottom material was prepared. The sealed paper container 2 was put in a predetermined cardboard, stored at room temperature of 15 to 20 ° C. for 2 days, and then shipped to a user for aseptic filling.

The sealed paper container 2 supplied to the user was unpacked, taken out of the cardboard, and carried into the aseptic chamber of the aseptic filling machine. The sealed paper container 2 supplied into the aseptic chamber was conveyed by a conveyor and moved to an electron beam sterilization step. In the electron beam sterilization step, as shown in FIG. 2A, an electron beam was irradiated from the lateral direction of the sealed paper container 2 while rotating the sealed paper container 2 on a conveyor. A low energy accelerator was used as the electron beam irradiation device. The electron beam irradiation conditions were an acceleration voltage of 300 keV and an absorbed dose on the paper container surface of 20 kGy.

The sealed paper container 2 whose surface was sterilized by irradiation with an electron beam was moved to the next filling step. In the filling step, first, as shown in FIG. 2 (b), the easily breakable sealing material 9 closing the bottom material filling port is broken by using the opening jig 13 to form the filling port 8. did. The paper container 1 in which the filling port 8 is formed moves below the filling nozzle, and the paper container 1 is raised to insert the filling nozzle 14 into the filling port 8 and at the same time, FIG.
As shown in (c), 250 ml of a coffee beverage separately sterilized according to a conventional method was filled. Filled paper container 2
Moved down, removed the filling nozzle 14 from the filling port 8, and moved to the next sealing step.

In the sealing step, as shown in FIG. 2D, the filling port sealing material 10 sterilized in another
The paper container 1 was hermetically sealed by sealing at the filling port 8 and then carried out of the aseptic chamber. The filling port sealing material 10 has PE20
Using a laminated material of 160 g / m ² / paper / PE30 / SiO _X -PET12 / LMD / PE40 (inner surface), the PE of the bottom material 7 and the PE of the filling port sealing material 10 were heat-sealed. In addition, for sterilization of the filling port sealing material 10, the above-mentioned laminated film was carried into a sterile chamber in the form of a web, and H ₂ O ₂ was sprayed on the front and back of the film to cause H ₂ O ₂ mist to adhere to both sides of the film. Thereafter, H ₂ O ₂ was dried with hot air, and the sterilized film was dried with a diameter of 40 mm.
Was punched into a circular shape to obtain a sterilized filling port sealing material 10. The sterilized filling port sealing material 10 was carried into the sealing step, and was sealed at the filling port 8 of the bottom member 7 to complete the aseptic filling of the paper container.

(Example 2) In the same manner as in Example 1, a tubular body made of a paper laminated material was prepared, and a lid material was heat-sealed on the tubular body. As shown in FIG. Obtained. As shown in FIG. 6B, 5% H ₂ O ₂ is added to the paper container 1.
0 μl was added dropwise, and the bottom material 7 described below was immediately heat-sealed to produce a sealed paper container 2 as shown in FIG. The bottom member 7 is made of the same laminated material as in the first embodiment, and
As shown in (a) and (b), as in Example 1, the laminated material was punched out into a circular shape to form a circular lid material, and a filling port 8 was provided at the center thereof. Next, as shown in FIG.
The filling port 8 was closed by heat-sealing the easily-openable sealing material 9a. Paper 80 / m ² / PE 30 / P
Laminated material consisting of ET 12 / LMD / sealant 40, width 30m
m, punched into a rectangular shape with a length of 35 mm and rounded corners, and heat-sealed the easy-open seal material 9 a to the bottom material 7 with a non-seal portion as shown in FIG.
The bottom material having the easy-opening sealing material 9a was used.

The sealed container 2 manufactured as described above was stored at room temperature for 2 days and shipped to the user in the same manner as in Example 1. As shown in FIG. 6D, the surface of the sealed container 2 supplied to the user was sterilized by electron beam irradiation in the same manner as in Example 1. Surface sterilized sealed container 2 irradiated with electron beam
Moved to the filling step, and as shown in FIG. 6 (e), the easy-opening sealing material 9a closing the filling port 8 of the bottom material was peeled off, and the filling port 8 was opened. Paper container 1 with opening 8
Moves below the filling nozzle, and as shown in FIG.
As in Example 1, a sterilized coffee beverage was filled.
After the filling is completed, the process proceeds to the sealing step, and as shown in FIG.
Sealed to complete aseptic filling.

[0041]

According to the present invention, the inner surface sterilization of a paper container
Since a small amount of hydrogen peroxide solution is sealed in a paper container and immediately sealed and stored in a sealed state for a certain period of time, the aseptic filling machine of the user can omit the step of sterilizing the inner surface of the paper container. In the aseptic filling device, the sterilization step of the container is an important step together with the sterilization step of the contents, and greatly affects the processing capacity of the aseptic filling machine. If simplified,
The size of the entire aseptic filling device can be reduced. That is,
By loading the sealing paper containers sterilized inner surface aseptic filling machine, sterilization by aqueous hydrogen peroxide solution, since it is limited to the filling port seal member, for sterilizing cartons by H ₂ O _2, H ₂ O ₂ supply tank and supply pipe, H ₂ O ₂
Spray apparatus, a hot air drying apparatus, a heating apparatus for making hot air, dry H ₂ O ₂ vapor exhaust system, and exhaust the H ₂ O ₂ vapor is environmental pollution and exhaust treatment device for preventing the atmosphere pollution And so on can be greatly reduced, so that the device can be downsized and the cost of the aseptic filling device can be significantly reduced. Further, the sterilization of the inner surface of the paper container becomes unnecessary, and the outer surface of the paper container can be sterilized at a high speed by an electron beam. As a result, mass production can be performed efficiently with a relatively inexpensive aseptic filling machine, so that product cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view showing schematic steps in a method for aseptically filling a liquid paper container according to the present invention.

FIG. 2 is a schematic diagram showing a main part in the aseptic filling method of the present invention.

FIG. 3 is an explanatory diagram showing a configuration of a lid member.

FIG. 4 is an explanatory view when H ₂ O ₂ is sealed in a paper container to sterilize the inner surface of the paper container.

FIG. 5 is an explanatory diagram showing a configuration of a bottom member.

FIG. 6 is a schematic diagram showing a schematic process of an aseptic filling method for a liquid paper container when an easily peelable sealing material is used as a sealing member for a bottom material.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 paper container 2 sealed paper container 3 trunk 4 lid 5 drinking spout 6 easy-open seal material (for lid material) 7 bottom material 8 filling port 9 easily breakable seal material 9 a easy-open seal material (for bottom material) 10 filling port seal member 11 H ₂ O ₂ 12 electron beam 13 opening jig 14 filling nozzle 15 content

Claims (3)

[Claims] 1. A method for aseptically filling a sealed liquid paper container with a liquid in a liquid paper container, wherein a small amount of hydrogen peroxide is sealed inside the liquid paper container. After sterilizing the inner surface of the sealed paper container, the outer surface of the sealed paper container is irradiated with an electron beam to sterilize the outer surface. Thereafter, in a sterile chamber, a filling port is formed in the sealed paper container. Filling a liquid content in the container, and after filling is completed, sealing the filling port with a sealing material. 2. A method for aseptically filling a sealed liquid paper container with a liquid in a sealed liquid paper container, wherein the liquid paper container is formed of a cylindrical body made of a paper laminated material at both ends of a cylindrical body. , One opening is closed with a lid made of a laminated paper material in which a spout is perforated and the spout is closed with an easy-open seal, and the other opening is used for filling a liquid. A filling port is perforated, and the filling port is an easily breakable sealing member,
Alternatively, it is a cylindrical paper container closed with a bottom material made of a paper laminated material to which an easy-opening sealing member is adhered, and a small amount of hydrogen peroxide is sealed inside the cylindrical paper container and sealed. After sterilizing the inner surface of the paper container, the outer surface of the sealed paper container is irradiated with an electron beam to sterilize the outer surface, and then, in a sterile chamber,
Breaking through the easily breakable sealing member closing the filling port of the sealed paper container, or peeling off the easy opening sealing member to open the filling port, and the liquid is introduced into the paper container from the filling port. A method for aseptically filling a liquid paper container, comprising filling contents and sealing the filling port with a sealing material after completion of filling. 3. An outer surface of the paper container is sterilized by irradiating an electron beam while rotating the liquid paper container in a circumferential direction, wherein the liquid paper container has a cylindrical shape. Item 3. The method for aseptically filling a liquid paper container according to any one of Items 2.