WO2010116850A1

WO2010116850A1 - Method and device for producing liquid food packed in container

Info

Publication number: WO2010116850A1
Application number: PCT/JP2010/054148
Authority: WO
Inventors: 賢博村野; 美穂森田; 通雄笠井; 直樹太田; 信義佐藤
Original assignee: 日清オイリオグループ株式会社
Priority date: 2009-04-08
Filing date: 2010-03-11
Publication date: 2010-10-14
Also published as: TW201103823A; JP2010241483A; CN102317164A

Abstract

A method and device for producing a liquid food packed in a container are provided in which gas replacement for filling the head space of the container with an inert gas is efficient and the gas replacement is excellent with respect to profitability, safety, and simplicity. A liquid food packed in a container is produced through a step in which immediately before the opening (16a) of a container bottle filled with a liquid food is capped with a capping machine (14), nitrogen gas is blown by means of a nitrogen gas replacement device (100) toward the opening (16a) from behind the container with respect to the travel direction of the container at an angle of -5 to 90º with the horizontal plane including the opening (16a) and the gas present in the head space of the container is thereby replaced with the nitrogen gas.

Description

Method for manufacturing container filled liquid food and apparatus for manufacturing the same

The present invention relates to a method for producing a container-filled liquid food and a device for producing the same, and more particularly to a method for producing a container-filled liquid food in which the headspace of the container is replaced with an inert gas and a device for producing the same.

It is known that the storability of edible oil is improved by filling the edible oil in a container such as a bottle container and then substituting the air present in the head space of the container with an inert gas such as nitrogen gas.

The step of replacing the air present in the head space of the container with an inert gas is optimally performed in an inert gas atmosphere in order to increase the replacement rate, but the amount of inert gas used is increased. Therefore, the cost is high, and work in an inert gas atmosphere puts the life of the worker in danger.

Therefore, in view of economy and safety, a method of efficiently replacing with a small amount of inert gas is preferable, and development of the replacement method is desired.

For example, Patent Document 1 discloses a method for gas replacement in such a head space, which is not a bottle container but a canned product.

In Patent Document 1, for the purpose of reliably and easily performing efficient gas replacement without loss, the upper direction of the can where the inert gas crosses the direction of oscillation of the liquid level of the fluid content (from 20 to the horizontal plane). It is disclosed to provide a gas replacement sealing method in which a can lid is immediately mounted and tightened after spraying from a blowing port having an inclination angle of 60 °.

Japanese Patent Publication No.57-29331

However, according to the gas replacement sealing method described in Patent Document 1, the gas injection timing is difficult even if improvement in gas replacement efficiency can be expected under predetermined conditions when a can container having an open top surface is used. There is a problem. Patent Document 1 does not disclose anything about the case of a bottle container.

Accordingly, an object of the present invention is to provide a method for producing a container-filled liquid food that is efficient in replacing the headspace of the container with an inert gas, and that is excellent in economics, safety, and convenience of gas replacement, and It is to provide the manufacturing apparatus.

In order to achieve the above object, the present invention is directed toward the opening of the container filled with liquid food at an angle of −5 to 90 ° with respect to the horizontal plane of the opening and in the backward direction with respect to the traveling direction of the container. A method for producing a liquid food filled with a container, comprising the step of spraying an inert gas to replace the gas present in the head space of the container with the inert gas.

In order to achieve the above object, the present invention is directed to the opening of a container filled with liquid food at an angle of −5 to 90 ° with respect to the horizontal plane of the opening and with respect to the traveling direction of the container. There is provided an apparatus for producing a liquid food filled with a container, comprising an inert gas replacement device for spraying an inert gas from a rear direction to replace the gas present in the head space of the container with an inert gas.

According to the present invention, a method and apparatus for producing a container-filled liquid food that is efficient in replacing the headspace of the container with an inert gas, and that is excellent in economics, safety, and simplicity of gas replacement. Can be provided.

It is the schematic which shows the whole manufacturing process of the container filling liquid food including the filling process of the liquid food to a bottle container, and the capping process of this container. It is the schematic which expands and shows the capping process in FIG. 1 is a perspective view of a nitrogen gas replacement device according to an embodiment of the present invention. It is a top view of the nitrogen gas replacement apparatus which concerns on one Embodiment of this invention. It is an upper surface perspective view of the nitrogen gas substitution apparatus concerning one embodiment of the present invention. It is explanatory drawing of the blowing angle of nitrogen gas, and is a front view of the opening of a container. It is explanatory drawing of the blowing angle of nitrogen gas, and is a top view of opening of a container. It is the elements on larger scale which show the positional relationship of a nitrogen gas replacement apparatus and a stopper. It is the schematic which shows the operation | movement in a capping process. It is a front view of the nitrogen gas replacement apparatus used for the comparative example. It is a front view of the nitrogen gas replacement apparatus used for the comparative example. It is a front view of the nitrogen gas replacement apparatus used for the comparative example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
[Container filling liquid food manufacturing equipment]
FIG. 1 is a schematic diagram showing the entire manufacturing process of a container-filled liquid food including a filling process of a liquid food into a bottle container and a capping process of the container. Moreover, FIG. 2 is the schematic which expands and shows the capping process in FIG.
The manufacturing process of the container-filled liquid food is performed in the filling booth 10.

The container filled liquid food manufacturing apparatus includes a first transporter 11, a filling machine 12, a second transporter 13, a plugging machine 14, a third transporter 15, and a nitrogen gas replacement device 100. Is done.

The first transport device 11 is a disc-shaped transport means having recesses at regular intervals on the circumference, and catches an empty bottle container 16 transported from the outside of the filling booth 10 while rotating. Then, it is conveyed to the next filling machine 12.

The filling machine 12 has a disk-shaped transport means having dents at regular intervals on the circumference and a liquid food filling means, and is an empty bottle container 16 transported from the first transport machine 11 while rotating. Is filled with the liquid food by the liquid food filling means while the bottle container 16 is rotated once, and then conveyed to the next second conveyor 13. The liquid food is filled in a predetermined amount so as to have a predetermined capacity of head space above the bottle container 16.

The second transport machine 13 is a disk-shaped transport means having dents at regular intervals on the circumference like the first transport machine 11, and is filled with the liquid food transported from the filling machine 12 while rotating. The bottle container 16 is caught by the concave portion and conveyed to the next stopper 14.

The capping machine 14 has a disk-shaped conveying means having dents at regular intervals on the circumference, and a capping means (cap conveying machine 14a shown in FIG. 8), and from the second conveying machine 13 while rotating. The bottle container 16 filled with the liquid food to be conveyed is caught by the concave portion, and the nitrogen gas is replaced with the bottle container 16 by the nitrogen gas replacement device 100 installed at the communication portion from the second conveyance device 13 to the closing device 14. Immediately after being sprayed on the opening 16a, the bottle container 16 is closed and sealed by the cap carrier 14a, and then conveyed to the next third carrier 15.

The third transporter 15 is a disk-shaped transporting means having dents at regular intervals on the circumference, like the first transporter 11, and is a bottle container with a stopper that is transported from the stopper 14 while rotating. 16 (container-filled liquid food) is caught by the concave portion and conveyed toward the outside of the filling booth 10.

(Nitrogen gas replacement device)
3 is a perspective view of a nitrogen gas replacement device according to an embodiment of the present invention, FIG. 4 is a top view thereof, and FIG. 5 is a top perspective view thereof.
The nitrogen gas replacement device 100 includes a main body portion 1 and a fixing portion 2 for fixing the main body portion 1 at a predetermined location. The nitrogen gas replacement device 100 is placed on a horizontal plane of the opening toward the opening 16a of the container filled with liquid food. On the other hand, nitrogen gas is blown at an angle of −5 to 90 ° from the rear direction with respect to the traveling direction of the container to replace the gas present in the head space of the container with nitrogen gas. The nitrogen gas replacement device 100 may have a configuration capable of blowing nitrogen gas from the lateral direction or the front direction as long as the nitrogen gas replacement device 100 has a configuration capable of blowing from the rear direction.

The main body 1 is used for blowing nitrogen gas from the rear at an angle of −5 to 90 ° with respect to the horizontal surface of the bottle container opening 16a and the

hose connection portions

3A and 3B for connecting a nitrogen gas supply hose. A rear nozzle 4 and a horizontal hole forming part 5 formed with circular

horizontal holes

5A and 5B for blowing nitrogen gas from the horizontal direction at an angle of −5 to 90 ° with respect to the horizontal surface of the opening 16a of the bottle container; Is provided.

The hose connection part 3A and the rear nozzle 4 are connected by a nitrogen gas passage 6A formed inside the main body part 1, and the hose connection part 3B and the

lateral holes

5A and 5B are formed inside the main body part 1. They are connected by a nitrogen gas passage 6B.

The rear nozzle 4 is preferably provided with a throttle mechanism for adjusting the flow rate of the nitrogen gas to be blown. Further, different nitrogen gas supply sources are connected to the

hose connection portions

3A and 3B so that the flow rate of the nitrogen gas from the rear nozzle 4 and the flow rate of the nitrogen gas from the

lateral holes

5A and 5B can be independently adjusted. It is desirable to do.

6A and 6B are explanatory views of the nitrogen gas blowing angle, FIG. 6A is a front view of the opening of the container, and FIG. 6B is a top view of the opening of the container.
The nitrogen gas is blown at an angle of −5 to 90 ° with respect to the horizontal plane of the opening 16a of the bottle container and from the rear side with respect to the traveling direction of the container by the rear nozzle 4. In addition to this, it is also possible to carry out from the lateral direction by the

lateral holes

5A and 5B and / or from the front direction by the lateral hole or the front nozzle.

By changing the formation position of the rear nozzle 4 and the

horizontal holes

5A and 5B, the direction of the nitrogen gas passage 6B, the installation position of the nitrogen gas replacement device 100, and the like, the nitrogen gas blowing angle can be changed.

Here, the blowing angle of nitrogen gas with respect to the horizontal plane of the opening 16a of the bottle container may be an angle of −5 to 90 ° with respect to the horizontal plane (0 °) of the opening 16a, and an angle of 0 to 90 ° is preferable. An angle of 5 to 70 ° is more preferable, an angle of 5 to 60 ° is still more preferable, and an angle of 5 to 40 ° is most preferable (see FIG. 6A).
In particular, the spray angle from the rear direction is preferably larger than 0 ° with respect to the horizontal plane (0 °) of the opening 16a. Also, the spray angle from the lateral direction and / or the front direction is preferably larger than 0 °, and the spray angle from all directions is more preferably larger than 0 °.

In addition, on the horizontal plane of the opening of the container, as shown in FIG. 6B, assuming that the opening center of the bottle container is the center point and the traveling direction of the bottle container (y in the figure) is a reference (0 °), “in the traveling direction” “Backward direction” (a in the figure) refers to the direction of 135 to 225 °, and “transverse direction with respect to the traveling direction” (b in the figure) refers to 45 to 135 ° and 225 ° to 315. The direction “°” means “forward direction with respect to the traveling direction” (c in the figure) means directions of 0 to 45 ° and 315 to 360 °. However, of the angles serving as the boundaries, 135 ° and 225 ° are included in the definition of the backward direction, and 45 ° and 315 ° are included in the definition of the horizontal direction. The spraying from the rear direction is preferably 150 to 210 °, more preferably 160 to 200 °. In the case of spraying from the lateral direction, 60 to 130 ° and / or 230 to 300 are preferable, and 75 to 125 ° and / or 235 to 285 ° are more preferable. When spraying from the front, it is preferably 10 to 44 ° and / or 316 to 350 °.

Further, an angle between the rear direction and the lateral direction and / or the front direction, that is, a line connecting the point of projecting the outlet center point in the rear direction on the opening horizontal plane of the container and the opening center point of the bottle container , An angle formed by a point formed by projecting the center point of the outlet in the horizontal and / or forward direction (in each case in both directions) on the opening horizontal plane of the container and a line connecting the opening center point of the bottle container (from 0 ° Is preferably 40 to 180 °, more preferably 45 to 150 °, still more preferably 45 to 135 °, and most preferably 50 to 120 °. For example, when the rear direction is 180 ° and the lateral direction is 90 °, the angle formed by these is 90 °, and when the rear direction is 210 ° and the front direction is 10 °, the angle formed by these is 160 °. In the case of three directions or when there are a plurality of outlets in one specific direction, it is preferable that one or more of the formed angles is within the above range, and two or more are within the above range. More preferably, all are within the above range.

[Method for producing container-filled liquid food]
Next, the manufacturing method of a container filling liquid food is demonstrated.
The production of the container-filled liquid food is performed according to the operation of each device / means constituting the above-described container-filled liquid food production apparatus. That is, the method for producing a container-filled liquid food mainly includes a step of transporting an empty bottle container 16 to the filling machine 12 by the first transporter 11, and a liquid so that the bottle container 16 has a head space by the filling machine 12. A step of filling food, a step of transporting the liquid food-filled container 16 to the stopper 14 by the second transporter 13, and nitrogen gas is blown to the opening 16 a of the bottle container 16 by the nitrogen gas replacement device 100. The step of replacing the gas present in the head space with nitrogen gas, the step of closing and sealing the bottle container 16 with the stopper 14, and filling the bottle container 16 (container-filled liquid food) with the third transporter 15 It has the process of conveying toward the exterior of the booth 10.

In particular, the process of replacing the gas present in the head space of the container with nitrogen gas in the operation of the nitrogen gas replacement device 100 and the stopper 14 is characteristic in the present invention, and will be described in detail below.

FIG. 7 is a partially enlarged view showing the positional relationship between the nitrogen gas replacement device and the stopper. FIG. 8 is a schematic view showing the operation in the closing process.
The step of substituting with nitrogen gas is performed by blowing nitrogen gas from the rear direction at an angle of −5 to 90 ° with respect to the horizontal plane from the opening toward the opening of the container filled with liquid food. The gas existing in the head space is replaced with nitrogen gas.

Blowing of nitrogen gas from the rear direction can be performed using the rear nozzle 4 as shown in FIGS. In addition to the rear direction, nitrogen gas may be blown from the lateral direction and / or the front direction, preferably from the lateral direction.

Here, the definitions and preferred ranges of “an angle of −5 to 90 ° with respect to the horizontal plane of the opening”, “backward direction”, “lateral direction”, and “frontward direction” are as described above.

The number of nitrogen gas outlets from each of the above directions is 1 or 2 or more. For example, in the nitrogen gas replacement device 100 of FIGS. 3 to 5, there are one rear outlet (rear nozzle 4) and two lateral outlets (

lateral holes

5A and 5B).

FIG. 8 shows a state in which the bottle container 16 is closed by the cap transporter 14a that moves down while holding the cap 16b while the bottle container 16 moves from the right side to the left side of the figure. Nitrogen gas is blown in the process of movement from FIG. 8 (center view) to FIG. 8 (left view), and it is preferable in terms of economy and safety to close the container immediately after blowing. It is more preferable to close the container while spraying. The term “immediately after spraying” means that there is almost no time from nitrogen gas spraying to closing the container, and the time from nitrogen gas spraying to closing the cap is preferably within 1 second, 0.5 seconds Is more preferable, and within 0.3 seconds is more preferable.

The bottle container 16 is preferably transported at a speed of 50 to 250 / min, more preferably at a speed of 100 to 200 / min, at a position where nitrogen gas is blown.

The opening 16a of the bottle container indicated by the dotted line in FIG. 7 is a position where nitrogen gas can be blown, and the distance X between the center of the opening 16a and the tip (outlet) of the rear nozzle 4 is preferably 1 to 10 cm. 3 to 8 cm is more preferable.

The amount of nitrogen gas sprayed from the rear direction is preferably 5 to 310 liters / minute, more preferably 5 to 80 liters / minute, more preferably 15 to 60 liters / minute, and further preferably 30 to 60 liters / minute, 30 to 55 liters / minute is most preferred, and 45 to 60 liters / minute is most preferred. The area of outlet of the rear nozzle at this time is preferably 45 ~ 1000 mm ^2, more preferably 45 ~ 400 mm ^2, more preferably 50 ~ 200 mm ^2, and most preferably 50 ~ 100 mm ^2. By spraying in this range, it can replace more efficiently and can prevent the liquid food of a liquid food in a container from being produced.

Further, the total amount of nitrogen gas sprayed from the lateral direction and / or the forward direction is preferably 30 to 450 liters / minute, more preferably 30 to 350 liters / minute, still more preferably 30 to 250 liters / minute, Most preferred is ˜250 l / min. Further, outlet area is preferably 45 ~ 1000 mm ² of each nozzle at this time, more preferably 50 ~ 400 mm ^2, more preferably 50 ~ 200 mm ^2, and most preferably 50 ~ 100 mm ^2.

The nitrogen gas is preferably sprayed so that the oxygen concentration in the head space of the bottle container 16 is 9% by volume or less from the viewpoint of suppressing the amount of oxygen absorbed in the stored liquid food, and more preferably 7% by volume or less. 5% by volume or less is more preferable, and 4% by volume or less is more preferable.

(Inert gas)
In the said embodiment, although nitrogen gas was demonstrated to the example, 1 or more types of inert gas chosen from nitrogen gas, argon gas, helium gas, and a carbon dioxide gas can be used. From the viewpoint of versatility and cost, nitrogen gas is preferable.

(container)
Although various containers can be used as the container, for example, the bottle container 16 is preferably used. The bottle container 16 is provided with a cap, and after the liquid food is filled, the bottle container 16 is sealed with a head space replaced with an inert gas. At this time, before filling the container with the liquid food, it is preferable to blow in an inert gas and replace the air and the inert gas.

The bottle container 16 is a so-called bottle-shaped container, and it is preferable in terms of function and design that the container cross-sectional diameter of the head space is smaller than the container cross-sectional diameter of the portion filled with the liquid food.

As the bottle container 16, for example, a liquid container containing 100 to 1800 g of liquid food can be used. The head space should have a certain capacity or more so that liquid splash at the time of opening can be prevented. For example, the ratio of the capacity (ml) of the head space to the amount (g) of liquid food to be accommodated is set to 0.02 to 0.1 (ml / g).

The material of the container is, for example, a resin such as polyethylene terephthalate (PET), polyethylene (PE), polyvinyl chloride (PVC), polylactic acid, glass, metal, or the like. A plastic container or a glass container using a resin is preferable, and a plastic container is particularly preferable. Moreover, it is good also as a thing of the multilayered structure which combined the film with this.

The plastic container is preferably a blow molded plastic container in order to maintain the shape of the container. Moreover, it is more preferable that it can be deformed by pressing or the like so as to reduce the capacity at the time of disposal.

(Liquid food)
The type of liquid food that can be used in the present embodiment is not particularly limited. There is no particular limitation as long as it is a liquid food that is fluid at 10 to 25 ° C. Examples include edible oils, dressings, and beverages, with edible oils being preferred.

The type of cooking oil is not particularly limited. For example, soybean oil, rapeseed oil, high oleic rapeseed oil, corn oil, sesame oil, sesame salad oil, perilla oil, linseed oil, peanut oil, safflower oil, high oleic safflower oil, sunflower oil, high oleic sunflower oil, cottonseed oil, grape Seed oil, macadamia nut oil, hazelnut oil, pumpkin seed oil, walnut oil, coconut oil, tea seed oil, sesame oil, borage oil, olive oil, rice oil, rice bran oil, wheat germ oil, palm oil, palm kernel oil, coconut oil, Examples include cocoa butter, beef tallow, lard, chicken fat, milk fat, fish oil, seal oil, algae oil, these oils and fats that have been low-saturated by breed improvement, mixed fats and oils, transesterified fats and oils, hydrogenated fats and oils, fractionated fats, etc. It is done.

Edible oils include L-ascorbic acid and L-ascorbic acid derivatives, vitamin E, tocopherols, ascorbic acid fatty acid esters, lignans, coenzyme Q, phospholipids, oryzanols, plant sterols, diacylglycerols, catechins, and polyphenols. And other additives such as antioxidants and emulsifiers such as tea extracts.

As the emulsifier, for example, polyglycerin fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, polysorbate, condensed ricinolein fatty acid ester, monoglycerin fatty acid ester, soy lecithin, egg yolk lecithin, soybean lysolecithin, egg yolk lysolecithin, enzyme-treated egg yolk, Examples include emulsifiers such as saponins, plant sterols, and milk fat globule membranes.

It is preferably an oil and fat to which one or more selected from antioxidants and emulsifiers are added.

[Effect of the embodiment of the present invention]
According to the embodiment of the present invention, the efficiency of gas replacement for replacing the head space of the container with an inert gas is good (in the preferred embodiment, the oxygen concentration in the head space is 9% by volume or less), and an inert gas atmosphere Since the amount of gas used can be reduced as compared with the case of the above, it is possible to provide a method for manufacturing a container-filled liquid food and an apparatus for manufacturing the same, which are excellent in economics and safety of gas replacement. Moreover, the manufacturing method of the container filling liquid food excellent in the simplicity of the process substituted to an inert gas, and its manufacturing apparatus can be provided.

Next, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

In the filling booth 10 shown in FIG. 1, a rapeseed oil made by Nisshin Oilio Group Co., Ltd. is filled into a bottle container 16 (capacity 400 g) made of polyethylene terephthalate (PET) with a filling machine 12, and then a nitrogen gas replacement device ( 3 and 9A-C), nitrogen is used to replace the air in the head space (30.6 ml) of the bottle container 16 (plastic) with nitrogen gas according to the conditions described in Tables 1 to 4 below. Gas was blown onto the opening 16a of the bottle container 16, and the cap carrier 14a was immediately plugged (within 0.3 seconds) to seal it.

For Examples 1 to 18 and Comparative Examples 1 to 8, the oxygen concentration (%) of the head space immediately after sealing (within 10 minutes after sealing) was measured by the following method, and the measurement results are shown in Tables 1 to 5 . The number of measurement is 20 for each of Examples 1 and 8 and Comparative Examples 1 to 3, and 10 for each of Examples 2 to 7, 9 to 18, and Comparative Examples 4 to 8.

<Method for measuring oxygen concentration in headspace>
With respect to the above-mentioned container immediately after sealing, which is a measurement target, a suction needle connected to the measurement target gas suction tube was inserted from above the lid, and the headspace gas collected from this was sent to the sensor unit and measured.
The instrument used for the measurement was OXYGEN METER RO-102 manufactured by Iijima Electronics Co., Ltd. The amount of gas sucked at a time was 3 ml, and this was repeated three times, and the gas sucked at the third time was used for the measurement.

According to Table 1, in Examples 1 to 7 where nitrogen gas was blown from the rear direction to the advancing direction of the container by the rear nozzle, the head space was efficiently replaced with nitrogen gas even though the flow rate of nitrogen gas to be blown was small. It can be seen that
However, in Examples 1 and 2, the oil in the container was splashed by blowing nitrogen gas.

In Examples 1 to 18 and Comparative Examples 1 to 8, the nitrogen gas spray angle was adjusted as follows.
The rear nozzle 4 in FIG. 3 has an angle of about 167 ° with respect to the traveling direction when projected onto the open horizontal plane of the container, an angle of about 34 ° with respect to the horizontal plane, and the area of the outlet is about 79 mm ^2. Is an angle of about 122 ° with respect to the traveling direction when projected on the horizontal plane of the container, an angle of about 30 ° with respect to the horizontal plane, the area of the outlet is about 79 mm ² , and the circular lateral hole 5B is the horizontal plane of the container. The angle with respect to the traveling direction when projected above was about 90 °, the angle with respect to the horizontal plane was about 30 °, and the area of the outlet was about 79 mm ² .
9A, the circular horizontal holes 201A to 201D have angles of about 98 °, about 92 °, about 88 °, and about 82 ° in order of projection with respect to the horizontal plane of the opening of the container. Each was about 30 °, and the area of each outlet was about 79 mm ² .
The horizontally elongated horizontal hole 301 in FIG. 9B had an angle of about 90 ° with respect to the traveling direction when projected onto the horizontal plane of the container, an angle of about 50 ° with respect to the horizontal plane, and the area of the outlet was about 679 mm ² .
The circular horizontal hole 401A in FIG. 9C is an oblong shape having an angle of about 98 ° with respect to the traveling direction when projected on the horizontal plane of the container, an angle of about 45 ° with respect to the horizontal plane, and an area of the outlet of about 79 mm ^2. The horizontal hole 401B has an angle of about 90 ° with respect to the traveling direction when projected onto the horizontal plane of the container, an angle of about 45 ° with respect to the horizontal plane, and the area of the outlet is about 279 mm ^2. The angle with respect to the traveling direction when projected onto the horizontal plane of the container was about 82 °, the angle with respect to the horizontal plane was about 45 °, and the area of the outlet was about 79 mm ² .

From Table 2, it can be seen that in Example 8 in which nitrogen gas was also blown from the lateral direction through the horizontal holes in addition to blowing from the backward direction by the rear nozzle, the head space was efficiently replaced with nitrogen gas. In Example 8, the total amount of nitrogen gas sprayed is the same as that of Example 1, but the nitrogen gas spray causes the oil in the container to drastically spill in Example 1, whereas in Example 8, the liquid spill I never did.
On the other hand, even if the total amount of nitrogen gas sprayed is the same as in Examples 1 and 8, in Comparative Examples 1 to 6 sprayed from the lateral direction only by the lateral holes, the number of holes serving as gas outlets and the shape of the holes It can be seen that even if devised, nitrogen gas could not be efficiently replaced.

From Table 3, it can be seen that in Examples 9 to 16 in which nitrogen gas was also blown from the lateral direction through the horizontal holes in addition to blowing from the backward direction by the rear nozzle, the head space was efficiently replaced with nitrogen gas.
Further, in Examples 9 to 16, the oil in the container was not spilled by blowing nitrogen gas.
In addition, when the nitrogen gas flow rate from the rear nozzle is fixed at 55 liters / minute, the head space is more efficiently replaced with nitrogen gas as the nitrogen gas flow rate from the horizontal hole is increased. It can be seen that at 245 liters / min or more, the nitrogen gas replacement rate hardly changes even when the flow rate is increased.

On the other hand, it can be seen from Table 4 that in Comparative Examples 7 to 8 in which nitrogen gas was blown only from the lateral direction through the lateral holes, the nitrogen gas replacement rate could not be improved much even if the nitrogen gas flow rate was increased.

From Table 5, it can be seen that in Examples 17 to 18 in which nitrogen gas was also blown from the lateral direction through the horizontal holes in addition to blowing from the backward direction by the rear nozzle, the head space was efficiently replaced with nitrogen gas.
Further, in Examples 17 to 18, the oil in the container was not splashed by blowing nitrogen gas.
It can also be seen that the slower the nitrogen gas replacement speed, the more efficiently the head space is replaced with nitrogen gas.

DESCRIPTION OF SYMBOLS 10: Filling booth 11: 1st conveying machine, 12: Filling machine, 13: 2nd conveying machine 14: Closing machine, 14a: Cap conveying machine, 15: 3rd conveying machine 16: Bottle container, 16a: Opening of bottle container DESCRIPTION OF SYMBOLS 100: Nitrogen gas replacement apparatus 1: Main part, 2: Fixing part, 3A, 3B: Hose connection part, 4: Back nozzle 5: Horizontal hole formation part, 5A, 5B: Horizontal hole, 6A, 6B: Nitrogen gas passage

Claims

Headspace of the container by blowing an inert gas toward the opening of the container filled with liquid food at an angle of −5 to 90 ° with respect to the horizontal plane of the opening and from the rear direction with respect to the traveling direction of the container A method for producing a container-filled liquid food, comprising the step of substituting a gas present therein with the inert gas.
The method for producing a container-filled liquid food according to claim 1, wherein the container is closed immediately after spraying the inert gas, or the container is closed while spraying the inert gas.
3. The container-filled liquid food manufacturing method according to claim 1, wherein the number of outlets of the inert gas from the rear direction is one or two or more.
The method for producing a container-filled liquid food according to any one of claims 1 to 3, wherein the inert gas is at least one selected from argon gas, helium gas, nitrogen gas, and carbon dioxide gas. .
The container-filled liquid food production according to any one of claims 1 to 4, wherein the inert gas is sprayed so that an oxygen concentration in a head space of the container is 9% by volume or less. Method.
The container-filled liquid food production according to any one of claims 1 to 5, wherein the container is transported at a speed of 50 to 250 bottles / minute through which the inert gas is sprayed. Method.
The method for producing a liquid food filled with a container according to claim 1, wherein the amount of the inert gas sprayed from the rear direction with respect to the traveling direction of the container is 5 to 310 liters / minute.
The container according to any one of claims 1 to 7, wherein the container is a blow-molded bottle container, and a container cross-sectional diameter of the head space is smaller than a container cross-sectional diameter of a portion filled with the liquid food. A method for producing a container-filled liquid food according to item 1.
The method for producing a container-filled liquid food according to any one of claims 1 to 8, wherein the liquid food is an edible fat.
Headspace of the container by blowing an inert gas toward the opening of the container filled with the liquid food at an angle of −5 to 90 ° C. with respect to the horizontal plane of the opening and from the rear direction with respect to the traveling direction of the container An apparatus for producing a container-filled liquid food, comprising: an inert gas replacement device that replaces a gas existing inside with an inert gas.
The container filled liquid food manufacturing apparatus according to claim 10, further comprising a filling machine that fills the liquid food and a plugging machine that closes an opening of the container.