JP6347737B2 - Filling and packaging method for gas-containing liquid packages - Google Patents

Description

  The present invention relates to a method for filling and packaging a liquid package and a gas such as an inert gas or a sterilization gas in a packaging bag without intruding the outside air. The present invention proposes a method for filling a gas-containing liquid package to be used suitably for a packaging bag having a film-like non-return pouring nozzle that exhibits a self-sealing function to prevent entry.

  For packaging bags made of laminated film for packaging that is filled and packaged with liquid packaging, if the outside air (air), dust, etc. are enclosed with the packaging in the bag, the packaging within the bag is oxidized, etc. As a result, the taste of the packaged goods may be deteriorated, or the fungi may be propagated in the bag. Therefore, as a method of filling the liquid package without enclosing air or the like into the packaging bag, after filling the package as in Patent Document 1, the method of replacing the air in the bag with nitrogen, As described in Patent Document 2, a package bag is filled with a full package, and in this state, an extra package is pushed out by a horizontal seal roll, and then a lateral seal is applied to seal the package (hereinafter referred to as a package). , Referred to as “in-liquid seal filling”).

  However, in the method described in Patent Document 1, when nitrogen gas is injected into the packaging bag, air or dust may be trapped in the packaging bag or the packaged object and remain as it is due to the injection. Therefore, it is impossible to enclose only the desired gas in the bag. Therefore, the entire room where the filling and packaging machine is installed has a nitrogen gas atmosphere. There was a problem that the amount of use was large and the cost was high.

  In addition, in the method described in Patent Document 2, when the liquid seal filling is performed while filling both the object to be packaged and the required gas, the gas floats on the upper part of the liquid object to be packaged and enters the packaging bag. There is a risk that the required amount of gas or liquid package cannot be filled, or the gas is caught in the seal part, and the gas expands by heating with a heat seal roll, causing large bubbles and causing blisters. There was a risk that the seal part would peel off or the packaged material would leak out.

By the way, as disclosed in Patent Documents 3 and 4, in recent years, not only when filling an object to be packaged, but also after opening the packaging bag, the intrusion of air or the like into the bag is prevented. A packaging bag having a pouring nozzle with a check function capable of suppressing oxidation, fouling and the like over a long period of time has been proposed.

  In such a packaging bag, since the spout has a non-return function, even if the packaged item is repeatedly poured out, the outside air is not taken into the bag, and the packaging bag body is accompanied by the discharge of the packaged item. Thus, the contraction deformation is caused by the volume corresponding to the amount of the packaged material to be dispensed. Therefore, when the amount of packaged items in the bag is large, the packaging film of the packaging bag body is sufficiently separated in the direction of the front and back under the action of the large head pressure of the packaged item, and the dispensing passage is compared It can be opened quickly and the package can be smoothly poured out from the opening of the tip of the dispensing nozzle by tilting the package, but the remaining amount of the package in the bag is less than 1/3 of the original When it is reduced to the extent, the packaging bag body shrinks or collapses, and the packaging films on the front and back of the packaging bag closely adhere to each other, preventing the free flow of the articles to be packaged in the bag. For this reason, when used for a packaged product that requires initial stirring during use, such as dressing, it is necessary to squeeze the package itself, which cannot be quickly dispensed. There is a problem that the time lag until the package is poured out from the opening of the tip of the dispensing nozzle becomes large and it becomes difficult to discharge the entire amount of the packaged article remaining in the contracted bag.

  As a method of relieving the mutual adhesive force between the laminated plastic films on the front and back of the packaging bag body, together with the liquid packaging material into the packaging bag, for example, nitrogen gas, argon gas, etc. It is preferable to enclose an inert gas or other gas that does not affect, but as described above, the conventional methods described in Patent Document 1 and Patent Document 2 do not allow outside air to enter, It was very difficult to enclose both the required amount of packaged goods and gas in the bag.

JP 2001-328601 A Japanese Patent Laid-Open No. 1-153410 JP 2005-15029 A JP-A-2005-59958

  Therefore, the present invention aims to solve the above-mentioned problems of the prior art, and completely blocks the required amount of gas and the required amount of liquid to be packed into the packaging bag from the outside air. It proposes a method of sealing while.

In order to achieve the above object, the present invention provides a self-packaging bag body and a soft laminated film on the front and back that overlap each other by fusion bonding at the peripheral portion excluding the base end, and a dispensing passage is defined in the central portion. A film-like non-return pouring nozzle having a sealing function, the outer surface of the base end portion of the non-return pouring nozzle is fusion-bonded to the inner surface of the packaging bag body, and the non-return pouring is performed. In a method of filling and packaging a liquid package and one or more of a plurality of gases into a packaging bag formed by projecting the exit nozzle to the side or upper part of the packaging bag body without intruding outside air. There,
The gas in diameter 1μm or more, in a state of microbubbles composed of 50μm following microbubbles dispersed in a liquid packed material in, when filling of the liquid packed containing the microbubbles to the packaging bag within the packaging bag A liquid which sandwiches the packaging bag with a pair of heat seal rolls while filling the liquid package containing the bubbles therein and heat-seals while squeezing out the liquid package and microbubbles between the heat seal rolls The present invention proposes a filling and packaging method for a gas-containing liquid packaged product, wherein the liquid packaged product and gas are filled and packaged in a packaging bag without intruding outside air by filling with a middle seal.

A more preferable solution of the present invention is as follows:
(1) The gas is an inert gas composed of one or more of nitrogen gas, carbon dioxide gas and argon gas, or an active gas composed of any one or more of oxygen and diluted air,
(2) The amount of the gas composed of bubbles is 2 to 30 vol% of the volume of the liquid packaged material filled in the packaging bag under atmospheric pressure.
It is.

  In this invention, the gas is bubbled and dispersed in the liquid package, and in this state, the liquid package is filled and packaged in a packaging bag by submerged seal filling to prevent outside air from entering. Meanwhile, the packaging bag and the required amount of gas can be filled into the packaging bag at the same time. In addition, since the gas composed of bubbles is in a state of being dispersed in the liquid package, the bubbles are also squeezed out together with the liquid package by the seal roll, so that the bubbles are caught in the seal portion. There is nothing.

  The bubble diameter varies depending on the viscosity of the liquid package, but by setting it to 15000 μm or less, the bubble rises even when the liquid package is sealed in liquid using an automatic filling machine. By utilizing the relative speed difference between the speed and the filling speed of the liquid package, the bubble rise can be delayed more than the filling of the liquid package, so that the required amount of gas is securely enclosed in the packaging bag. can do.

  In addition, the gas composed of bubbles filled in the packaging bag together with the liquid package is gradually raised by buoyancy, and finally accumulates on the liquid package. Therefore, even when the spout of the packaging bag has a non-returning function that prevents the outside air from entering the bag, the gas accumulated in the upper part of the liquid package is laminated film for packaging on the front and back of the packaging bag body. The packaging adhesive film of the front side and the laminated film for packaging of the back side are greatly separated from each other, and when the packaged material in the bag is poured out, the gas enters the occupied space. It is possible to induce (replace) the inflow of the packaged item and to smoothly dispense the packaged item.

It is a perspective view which shows one Embodiment of the package formed by this invention in a standing posture. It is a perspective view which shows the attachment method of the non-return pouring nozzle to a packaging bag main body. It is a front view which shows one Embodiment of the liquid filling apparatus for filling and packaging a liquid package by the method which concerns on this invention.

An embodiment of the present invention will be described below based on the drawings.
A packaging bag 1 shown in FIG. 1 includes a packaging bag body 2 made of a laminated film for packaging having a laminated structure of two layers or three or more layers, and a base film layer and a sealant layer. And a non-return dispensing nozzle 3 made of a soft laminated film having a laminated structure of three or more layers, and the non-return dispensing nozzle 3 on the sealant layer on the inner side surface of the packaging bag body 2. The non-return dispensing nozzle 3 is provided so as to protrude laterally from one side portion of the upper end portion of the packaging bag body 2 in the figure by fusion-bonding the outer surface of the base end portion.
Although the packaging bag 1 of this embodiment is comprised from the packaging bag main body 2 and the non-return pouring nozzle 3, the filling packaging method of this invention is not limited to this, Only a packaging bag main-body part is shown. Any packaging bag that can be filled and packed by submerged seal filling of liquid packages, such as a three-side seal or four-side seal type packaging bag or sachet, or a spout-equipped packaging bag, can be suitably used.

  The non-return dispensing nozzle 3 has a base end side in a state in which one flat soft laminated film is folded or in a state in which two flat soft laminated films are overlapped with each other so as to face the sealant layer. The spout passage 4 is defined in the central portion by fusion bonding at the peripheral portion except for the above, and such a non-return pouring nozzle 3 tears and removes the fusion splicing portion 5 at the tip portion. Then, the dispensing passage 4 is opened, and the liquid packaged material in the packaging bag body 2 is poured into the packaging bag body 2 based on the collapsed deformation of the packaging bag body 2 as required. On the other hand, when stopping the dispensing from the packaging bag 1 based on the standing displacement of the packaging bag body 2, the inner surface of the dispensing passage 4 of the non-return dispensing nozzle 3 is made into a capillary tube for liquid packaging. Immediately seal under the thin film of the package due to wetness due to phenomenon etc. Prevents outside air from entering the bag body 2 preferably has a self-sealing function.

  By the way, this non-return dispensing nozzle 3 tilts the packaging bag main body 2 so that the non-return dispensing nozzle 3 faces downward when dispensing the items in the bag. 3 is opened by the liquid head pressure of the liquid packaging material, and the packaging material in the bag can be poured out as required, but as described above, the tip opening of the check dispensing nozzle 3 is opened. Because the self-sealing function automatically seals and seals, there is no risk that outside air may enter the packaging bag 1 through the non-return dispensing nozzle 3 even if the packaged items in the bag are repeatedly poured out. It has characteristics.

  As a method for attaching the check pouring nozzle 3 to the packaging bag body 2 and a method for manufacturing the packaging bag, for example, an apparatus similar to that described in Japanese Patent Laid-Open No. 2008-55739 as shown in FIG. Can be used.

In FIG. 2, a nozzle film 6 on which a large number of non-return dispensing nozzles 3 are previously formed is continuously or intermittently driven, preferably continuously, at a required speed, for example, from its winding roll 7. One sealant layer on the outer surface of the base end portion of each of the check pouring nozzles 3 is moved to the packaging bag body film 8 while being fed to the packaging bag body film 8 and traveling at a constant speed. Then, the unnecessary part of the nozzle film 6 is cut off from the non-return dispensing nozzle 3 and removed.
Subsequently, the packaging bag body film 8 to which the non-return dispensing nozzle 3 is fused and joined is sent to, for example, an automatic filling machine shown in FIG. The automatic filling machine includes a plurality of guide rollers 9 for guiding the travel of the packaging bag body film 8 that is intermittently or continuously drawn from the raw roll, and the packaging bag body film 8 that has passed through the guide rollers 9. The film folded portion 11 that is half-folded so that the sealant layers face each other at the center in the width direction, and the free end portions of the packaging bag body film 8 folded by the film folded portion 11, For example, the liquid package is intermittently placed inside the longitudinal sealing mechanism 12 that continuously forms the fusion bonding portion 14 in the vertical direction and the film 8 for the cylindrical packaging bag body on which the fusion bonding portion 14 is formed. Alternatively, a filling means for continuously filling, in the figure, a filling nozzle 13 and a tubular packaging bag main body film 8 filled with a liquid article to be packed for the bottom and top lateral fusion bonded portions. Comprising a transverse sealing mechanism 16 for forming a deposited joint 15.
In the automatic filling machine, the fusion-bonding portion 15 serving as the bottom and top of the packaging bag 1 is laterally sealed by the horizontal sealing mechanism 16 (a pair of horizontal heat sealing rolls) while squeezing out the liquid package. (Packing with a seal in liquid) can be used to manufacture a package 18 in which a liquid package is filled in the packaging bag 1 while preventing entry of outside air.

  Further, in the illustrated automatic filling machine, in addition to the above, a function to increase the fusion-bonding strength by sandwiching the fusion-bonding portion 15 formed by the horizontal-seal mechanism 16 including a pair of horizontal-seal rollers again. And a cutter means 17 that cuts and separates the package 18 that is intermittently or continuously manufactured and continuous into one piece or a plurality of required pieces.

  In such a package 18, together with a required amount of liquid package, an inert gas such as nitrogen gas or carbon dioxide gas that does not affect the liquid package, a gas having a bacteriostatic or sterilizing effect, Preferably, when 2 vol% or more of the filling amount (volume) of the packaged item in the bag is enclosed (hereinafter referred to as “enclosed gas”), the enclosed gas accumulates above the liquid packaged item in the package 18. The packaging film 1 acts to separate the packaging films on the front and back, which are adhered to each other by the check function of the check pouring nozzle 3, and occupies the enclosed gas when pouring out the package contents in the bag. The effect that the in-bag packaged item can be smoothly poured out by flowing the packaged item in the bag into the space and replacing it with the sealed gas can be expected.

  Therefore, in the present invention, as shown in FIG. 3, the packaging bag main body film 8 is half-folded at the center in the width direction so that the sealant layers face each other, and the free end is formed by the vertical seal mechanism 12. A cylindrical body formed by vertical sealing is filled with bubbles of an enclosed gas together with a liquid package, and the horizontal sealing mechanism 16 (a pair of horizontal heat seal rolls) is dispersed in the liquid package. ) Squeezes out the liquid package and microbubbles, and horizontally seals the package to fill the package bag 1 with a predetermined amount of sealed gas together with the liquid package while preventing the entry of outside air. I suggest that.

In addition, bubbles of the sealed gas are generated in the liquid package by blowing the sealed gas from the gas filling nozzle 20 as shown in FIG. 3 to the liquid package supplied via the filling nozzle 13. be able to. In this case, the size of the bubbles can be adjusted by changing the diameter or blowing pressure of the gas filling nozzle 20 or the like.
Further, as a method for generating bubbles, in addition to the above, a bubble generating device (not shown) such as an aspirator is provided in front of the filling nozzle 13 to generate bubbles of enclosed gas in the liquid package in advance. The packaged liquid containing the bubbles may be filled into the packaging bag 1 from the filling nozzle 13.

  By the way, the rising speed of bubbles in the liquid package can be obtained from Stokes' law. For example, when the liquid package is water, a bubble with a diameter of 1 mm floats several meters per minute. On the other hand, it is known that a microbubble having a diameter of 10 μm floats only a few mm per minute. For this reason, when the sealed gas is generated in the liquid package as, for example, fine bubbles of 50 μm or less, the bubbles hardly move from the generation position when they are filled in the packaging bag 1 (the surface of the bubbles is levitated). No) and in a state of being dispersed in the liquid package in a small state. Therefore, according to this method, the required amount of gas and the liquid package can be filled and packaged in the packaging bag 1 simultaneously without causing foaming in the seal portion.

  Also, as shown in FIG. 3, a pair of squeezing rolls or squeezing plates 10 is provided at a position above the tip of the gas filling nozzle 20 to squeeze the cylindrical packaging bag main body film 8 so that the gap is 1 to It is preferable to narrow it to about 10 mm. According to this, the feeding speed of the liquid package can be adjusted, the rising of the generated bubbles is suppressed, and the film for the packaging bag body in which the bubbles are cylindrical. Since the inside of the packaging bag 1 is filled along the inner surface of 8, the floating of bubbles can be effectively suppressed.

The size of the bubble varies depending on the viscosity of the liquid package, but the bubble diameter at the time of occurrence is preferably 15000 μm or less, more preferably 1 to 5000 μm, still more preferably 1 to 500 μm, still more preferably. Is 10 to 100 μm.
In general, microbubbles with a bubble diameter of 50 μm or less when they are generated are called microbubbles, but these microbubbles rise rapidly in water and burst and disappear on the surface. Compressed by the surface tension of water, shrinks, ruptures and disappears in water, and the surface is negatively charged. It has the characteristics of maintaining and uniformly dispersing in the liquid.
Therefore, in the present invention, from the viewpoint of suppressing the floating and aggregation of bubbles, microbubbles, Ri following microbubbles der 50 [mu] m, when it comes to very small gas bubbles of less than 1 [mu] m (nanobubbles), in water in the state It may exist stably for a long time (over several months), and it takes a long time for the bubbles to rise and the gas to accumulate on the top of the liquid package. because it may not be effective to alleviate the mutual adhesion of the packaging laminate film 2 on the front and back, the bubble diameter is equal to or greater than 1 [mu] m.

  On the other hand, with respect to the upper limit value of the bubble size, by using the relative speed difference between the filling speed of the liquid package (liquid feeding speed) and the bubble rising speed, The upper limit value of the bubble size is preferably 15000 μm or less from the general filling speed in the automatic filling machine as shown in FIG. Since it varies depending on the viscosity, temperature, etc. of the package, it is appropriately determined according to various conditions such as the type of liquid package to be filled.

  The sealed gas is preferably selected according to the type of liquid package to be filled in the packaging bag 1, and in the case where the liquid package is easily oxidized or fouled by air (for example, a seasoning liquid such as soy sauce) In addition, it is preferable to use an inert gas such as nitrogen or carbon dioxide for oils, cosmetics, pharmaceuticals, etc., and even if the liquid package is in contact with a certain amount of active gas, the quality is not deteriorated. In some cases, an active gas such as oxygen or diluted air may be used. In particular, when the packaging bag 1 has the non-return dispensing nozzle 3 as described above, the self-sealing function of the dispensing nozzle 3 prevents outside air from entering the packaging bag. Although the growth of aerobic bacteria can be effectively suppressed, there is a problem that anaerobic bacteria such as Clostridium botulinum and Clostridium perfringens may grow because the amount of dissolved oxygen in the packaging bag 1 is small. there were. Also in this regard, according to the present invention, the pH of the liquid package is lowered by sealing carbon dioxide gas having a bacteriostatic effect together with the liquid package, or a mixed gas of carbon dioxide and nitrogen gas. The effect that the growth of the sex bacteria can be effectively suppressed can be expected.

By the way, the filling amount of the sealed gas is set to 2 vol% or more of the liquid packaged material filled in the packaging bag 1, if it is less than 2 vol%, the adhesion force between the inner surfaces of the packaging bag body 2 is alleviated. This is because the dispensing passage 4 of the non-return dispensing nozzle 3 cannot be sufficiently opened. On the other hand, if 2 vol% or more of the liquid packaged material filled in the packaging bag 1 is sealed, the above effect can be effectively exhibited regardless of the amount of the sealed gas.
When the amount of the enclosed gas is large, the filled gas also flows out from the dispensing passage 4 when the liquid package is poured out from the dispensing passage 4 of the non-return dispensing nozzle 3 depending on how to use and use. Because of the danger, the upper limit of the amount of the enclosed gas is preferably set to 30 vol% or less of the liquid article to be packed in the packaging bag 1.

  As mentioned above, although this invention was demonstrated based on embodiment of illustration, it is not limited to this, It can change suitably as needed, Moreover, as a liquid to-be-packed material filled and packaged in a packaging bag Can be suitably used various kinds of seasonings such as soy sauce, cosmetics, pharmaceuticals, hot pack foods, retort foods and the like.

DESCRIPTION OF SYMBOLS 1 Packing bag 2 Packing bag main body 3 Non-return pouring nozzle 4 Pouring passage 5 Fusion joining part 6 Nozzle film 7 Winding roll 8 Packaging bag main body film 9 Gyrodol 10 Squeezing roll or squeezing plate 11 Film folding part 12 Vertical seal Mechanism 13 Filling nozzles 14, 15 Fusion joint 16 Lateral seal mechanism 16 a Second transverse seal mechanism 17 Cutter means 18 Package 20 Gas filling nozzle

Claims (3)

Film-like non-return pouring nozzle having a self-sealing function in which the packaging bag body and the soft laminated films on the front and back that overlap each other are fused and joined at the peripheral portion except the base end, and the pouring passage is defined in the central portion. The outer surface of the base end portion of the check pouring nozzle is fused and joined to the inner surface of the packaging bag body, and the check pouring nozzle is connected to the side of the packaging bag main body or A method of filling and packaging a liquid package and any one or more of a plurality of gases without intruding outside air into a packaging bag protruding upward,
The gas in diameter 1μm or more, in a state of microbubbles composed of 50μm following microbubbles dispersed in a liquid packed material in, when filling of the liquid packed containing the microbubbles to the packaging bag within the packaging bag Sandwiching the packaging bag with a pair of heat seal rolls while filling the liquid package containing the microbubbles therein, and heat sealing while squeezing the liquid package and microbubbles between the heat seal rolls; A filling and packaging method for a gas-containing liquid package, wherein the liquid package and the gas are filled and packaged in a packaging bag without intruding outside air by filling with a seal in liquid. The gas is nitrogen gas, to claim 1, characterized in that any inert gas comprising one or more or oxygen and inert gas consisting of any one or more of the dilution air, carbon dioxide and argon gas A method for filling and packaging a gas-containing liquid package according to claim. 3. The gas-containing liquid coating according to claim 1, wherein the amount of the gas composed of bubbles is 2 to 30 vol% of the volume of the liquid package filled in the packaging bag under atmospheric pressure. Packing and packing method for packages.

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