JP2003047412A - Method for filling fluid food into paper can - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for filling a fluid food into a paper can, capable of smoothly filling it with high quality without letting a filled product overflow or rush out from a tip of a cap when filling at high speed the fluid food with relatively low fluidity into the paper can. SOLUTION: This method for filling the fluid food with relatively low fluidity into the paper can with the tip on the cap comprises bringing the sterilized inside of the can to a reducing atmosphere, filling the fluid food separately in twice or a few times from the tip so as to leave a head space height of >=13 mm inside the can and sealing the tip through substituting the head space inside for reducing gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for filling a liquid can with a fluid food having a relatively low fluidity into a paper can.

[0002]

2. Description of the Related Art Paper cans are made of a material having a thin barrier layer formed by sandwiching a ceramic between polyethylene films and the like on one surface of a paperboard, and closing the bottom of the cylindrical body with a bottom lid. The upper part is covered with a lid with a mouth. When filling beverages with relatively high fluidity such as tea, coffee beverages, soft drinks, and fruit beverages, sterilized cans are filled with the sterilized beverage under a reducing atmosphere, and then formed on the upper lid. After filling from the mouth, the mouth is sealed with a tab sheet (sealing material). When filling beverages into metal cans, the beverages are filled after cleaning the cans that have open tops, the tops are sealed with an upper lid after filling, and then each filled can is washed and sterilized by heating. In the case of, it is not possible to wash or heat sterilize the entire can,
The can and the beverage to be filled are separately sterilized in advance and then filled in a sterile environment.

[0003]

As described above, when a beverage having a relatively high fluidity is filled in a paper can, the beverage can be filled relatively smoothly and there is almost no problem in the subsequent handling. However, for liquid foods with relatively low fluidity that contain a lot of proteins such as casein, such as highly nutritive liquid foods used for in-hospital foods, if the drinker is not a healthy person, filling and filling Various problems arise in the later handling. First, low-fluid foods that contain a lot of proteins such as casein may foam during high-speed filling, and may have a relatively large specific gravity. It often happens that (from the filling port during filling) it sticks out or pops out on the upper surface of the upper lid and adheres to the upper surface. Since a paper can is not suitable for washing after filling like a metal can, in such a case, it is discarded as a defective packaging. Second,
This type of low-fluidity food often separates into a high specific gravity portion and a low specific gravity portion after being filled in a can, and when drinking, it is necessary to shake the can sufficiently to thoroughly stir the contents before drinking. However, it is often the case that the contents cannot be sufficiently agitated especially when used by a patient who has insufficient body freedom. Thirdly, when the tab material is peeled off and the drinking mouth is opened for drinking, when the can moves up and down, the droplets of the contents may pop out from the drinking mouth.

It is an object of the present invention to smoothly and highly prevent the filling material from sticking out or popping out of the mouth of the upper lid when filling a liquid food having a relatively low fluidity into a paper can at a high speed. It is an object of the present invention to provide a method for filling a fluid can into a paper can that can be filled with quality. Another object of the present invention is to shake the can during drinking to stir the contents,
Another object of the present invention is to provide a method for filling a fluid can into a paper can that can be stirred more efficiently. Still another object of the present invention is a method for filling a fluid food into a paper can in which the contents are not easily scattered even when the can moves vertically when the tab sheet that seals the mouth of the upper lid is peeled off during drinking. To provide.

[0005]

According to the method for filling a fluid can into a paper can according to the present invention, in order to achieve the above-mentioned object, a paper can having a drinking spout on the upper lid has relatively low fluidity. When filling fluid foods, the sterilized can is made into a reducing atmosphere and the head space inside the can is set to 13 mm.
It is characterized in that the liquid food is filled into the mouthpiece twice or several times so that the headspace is replaced with reducing gas so that the mouthpiece is sealed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a method for filling a fluid can into a paper can according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view for explaining a method for filling a fluid food according to an embodiment of the present invention, and FIG. 2 is a partially enlarged plan sectional view showing an enlarged edge joint portion of a cylindrical body portion of a paper can. FIG. 3 is a partially enlarged cross-sectional view of a main material of a paper can, FIG. 4 is a partially enlarged cross-sectional view of a tab sheet of the paper can, and FIG. 5 is a partially enlarged cross-sectional view of a protect tape that joins the edges of a cylindrical body.

The paper can 1 is composed of a cylindrical body 10 and an upper lid 11 and a bottom lid 12 that close the upper and lower portions of the cylindrical body 10. The upper lid 11 is formed with a drinking port 11a at a position deviated from the central portion in the circumferential direction. Has been done. The drinking port 11a is sealed with a tab sheet (sealing material) 13 after the fluid food 2 is filled in the can 1. The side edge of the cylindrical body 10 is heat-sealed via a protective tape 10a having a gas barrier property as shown in FIG.

The material of the cylindrical body portion 10, the top lid 11 and the bottom lid 12 of the paper can 1 is a laminated sheet as shown enlarged in FIG. a is a paperboard, and one surface of this paperboard a (the surface side of the can)
Is laminated with a multilayer film b in which a barrier layer b1 made of a ceramic vapor deposition film is sandwiched between PE films b2 and b2, and a PE film is formed on a printed layer c fixed on the other surface of the paper board a. A coating layer d made of, for example, is laminated. For example, the thickness of the cylindrical body 10 is 0.5 m
m, the thickness of the top lid 11 is 0.6 mm, and the thickness of the bottom lid 12 is 0.4 mm.

The material of the tab sheet 13 is a laminated sheet as shown enlarged in FIG. 4, and this laminated sheet is formed by laminating a multi-layered film b having the same structure as in FIG. 3 on one surface of a thin paper board a. PET on the printed layer c fixed on the other surface
A coating layer d ′ made of a film or the like is laminated.
The material of the protect tape 10a is a laminated sheet as shown in an enlarged scale in FIG. 5, and this laminated sheet is provided on both surfaces of a multilayer film b'where a barrier layer b1 made of ceramic is vapor-deposited on a base material film b3 such as PET. A coating layer d such as a PE film is laminated.

In the packaging line, a laminated sheet wound in a coil shape is unrolled and sequentially cut into a required shape, one side edge of which is covered with a protect tape 10a and a protect tape 10a as shown in FIG. The cylindrical body portion 10 is formed by rolling it in a tubular shape so that the side edges on the side of the side that is formed are inward, and overlapping the both side edges and heat-sealing. Next, the upper lid 11 cut into a required shape is inserted into one end of the cylindrical body portion 10 and molded into a tray shape, and heat-sealed to wrap the upright side wall of the upper lid 11 so that the cylindrical body portion 1 is wrapped.
The sleeve end 0 is curled inwardly and heat-sealed to attach the upper lid 11 to one end of the cylindrical portion 10. Further, the bottom lid 12 is attached to the other end of the cylindrical body 10 in a similar manner. The internal height D of the paper can 1 is such that when the fluid food 2 is filled later with, for example, 200 ml, the head space HS has a height d = 13 mm or more, preferably 14 mm.
It is designed to be over mm.

The paper can 1 formed as described above is kept in a standing posture so that the drinking spout 11a is positioned in a certain direction while being conveyed on the line, and is sent into a sterile chamber (not shown), In the state of being aligned in rows (three rows), the cells are further intermittently transported in the chamber, and in this transportation process, each row is sequentially processed as follows. First, let the spray nozzle face the inside of the paper can 1 from the drinking port 11a,
After sterilizing by spraying hydrogen peroxide gas, the inside of the paper can 1 is dried with hot air for several times.

The paper can 1 that has been dried with hot air is heated in a short time after supplying nitrogen gas into the paper can 1 to create a reducing atmosphere.
(40 ° C.) The sterilized fluid food 2 is filled. The fluid food is stored in a tank (not shown) and is filled at two locations in a sterile chamber through filling nozzles 3 communicating with the tank. For the filling, 100 ml of each is filled at two places while the paper can 1 is being conveyed. 13 mm to the inner top of the paper can 1 when filled
Since the above head space HS is vacant, the head space HS is replaced with nitrogen gas to create a reducing atmosphere, and then the tab tape 13 is used to open the mouth 11a of the upper lid 11.
And the paper cans 1 are sequentially carried out from the aseptic chamber.

The fluid food 2 filled in the paper can 1 in this embodiment is a highly nutritive liquid food that is drunk in the hospital or outside the hospital under the guidance of a doctor or nutritionist, and is composed of dextrin, vegetable oil, whey protein digestion. , Soybean protein, indigestible dextrin, granulated sugar, casein, pH adjuster, cellulose, magnesium carbonate, emulsifier, fragrance, etc. are the main raw materials and have relatively low fluidity. This kind of liquid food with low fluidity can be used at high speed (one row, 1800 or more per hour) at a high speed by leaving the headspace at a height of about 6 mm, as in the case of liquid food with high fluidity. When the aseptic filling is performed, the fluid food 2 that is foamed due to the filling sticks out or pops out from the mouth 11a and the top lid 1
1 is attached to the surface.

However, in the filling method of the above-described embodiment, the paper can 1 having a large volume is manufactured without changing the inner diameter, and the liquid food 2 is filled into the paper can 1 in two batches. Even when filled at high speed, the liquid food 2
Bubbling and splattering are suppressed. Therefore, even if the fluidity of the fluid food 2 is small, it is possible to prevent the fluid food from sticking out or popping out of the drinking port 11a, and filling the fluid food with a smooth and high-quality paper can. Is achieved at normal speed. Further, since the head space HS inside is filled so as to have a height of 13 mm or more, it is possible to homogenize more efficiently and in a short period of time when shaking the inside of the paper can 1 by shaking the can 1 for drinking, and the tab sheet 13 is used. Even if the paper can 1 shakes up and down when peeled off, the fluid food 2 inside is
It is possible to prevent jumping out from 1a.

According to an experiment conducted by the inventor, as described above, a highly nutritive liquid food having relatively low fluidity is to be filled, and the inner diameter of the paper can is 53 mm, the filling is performed twice, the temperature of the filling is 20 ° C., and the conveyance is performed in a sterile chamber. When the number of rows of paper cans is three, the head space height d after filling is 13 mm and the number of rows is 540 per hour.
With 0 cans, good quality filling (smooth filling without fluid food sticking out or popping out of the mouth) was possible, but at a headspace height of 12 mm after filling, for good quality filling Was 2700 cans per hour, and efficient filling was difficult. Further, when the head space height d after filling is ≧ 14 mm, it is 720 per hour.
High quality filling was possible with 0 cans. Therefore, in the method of the present invention, it is necessary that the head space HS in the paper can 1 remains 13 mm or more in height after filling.
It is more preferably 4 mm or more. Head space H
When the filling amount of the fluid food 2 is 200 ml, 180 ml, or 250 ml, the height of S is 14 mm or more, which enables smooth high-speed filling.

In the filling method according to the present invention, the height of the head space after filling may be 13 mm or more, and the upper limit is not set. However, if the height of the head space becomes unnecessarily large, the material cost of the paper can increases, and the head space of a certain size or more is wasted. Therefore, the inner diameter of the paper can and the fluidity of the fluid food are large or small. For example, it may be appropriately set within a range not exceeding 17 mm. The number of times of filling depends on the fluidity of the fluid food, the inner diameter of the paper can, etc., but if the number of times of filling is increased, a large-capacity aseptic chamber is required.
It is preferable to fill in 3 times.

EFFECTS OF THE INVENTION According to the method of filling a fluid can into a paper can according to the present invention, the fluid food is divided into two or several times from the drinking mouth so that the head space height in the can remains 13 mm or more. Since the head space is filled with a reducing gas to seal the drinking mouth, even when liquid food having relatively low fluidity is filled at high speed, foaming or scattering of the liquid food is suppressed. Therefore, it is possible to prevent the fluid food from sticking out or popping out from the drinking mouth, and smooth and high-quality filling of the fluid food into a paper can is realized at a normal speed. Further, since the head space inside is filled so as to have a height of 13 mm or more, it is possible to homogenize more efficiently and in a short time when shaking the inside of the paper can by shaking it for drinking, and the tab sheet is peeled off. Even if the paper can sometimes shakes in the vertical direction, the fluid food 2 inside can be prevented from jumping out from the mouth.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining a method for filling a fluid food according to an embodiment of the present invention.

FIG. 2 is a partially enlarged plan sectional view showing an enlarged edge joint portion of a cylindrical portion of a paper can.

FIG. 3 is a partially enlarged sectional view of a main material of a paper can.

FIG. 4 is a partially enlarged sectional view of a tab sheet of a paper can.

FIG. 5 is a partially enlarged cross-sectional view of a protect tape that joins edges of a cylindrical body.

[Explanation of symbols]

1 paper can 10 cylindrical body 10a Protect tape 11 Top lid 11a mouth 12 Bottom lid 13 tab sheets 2 Liquid food 3 filling nozzles HS headspace D Paper can internal height d Headspace height

Continued front page    (72) Inventor Akira Suenaga             Stock Market, 4-22, Meguro, Meguro-ku, Tokyo             Inside the company clinic (72) Inventor Yasuhiro Takeda             Morinaga 5-chome, 1-3-1, Higashihara, Zama City, Kanagawa Prefecture             Dairy Co., Ltd. Nutritional Science Research Institute (72) Inventor Etsuo Shimamura             1-5-1 Taito, Taito-ku, Tokyo Toppan stamp             Imprint Co., Ltd. F-term (reference) 3E118 AA02 AB15 BB02 BB08 CA07                       CA12 DA02 DA06 FA04                 4B018 LE06 ME14 MF09                 4B021 LA02 LA14 LA26 LA32 MQ05                 4B035 LC06 LE03 LE11 LP46 LT16

Claims (2)

[Claims] 1. When filling a fluid can with relatively low fluidity into a paper can having a drinking spout on the upper lid, a sterilized can is made into a reducing atmosphere, and the head space height in the can is 13 mm or more. A paper can, characterized in that the liquid food is filled into the can from the drinking mouth twice or several times so as to be left, and the head space is replaced with a reducing gas to seal the drinking mouth. Method of filling liquid food with liquid. 2. The liquid food is a high nutrition liquid food,
A method for filling a fluid food into a paper can according to claim 1.