JP2010030689A - Flexible packaging bag equipped with non-return function nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-self-standing flexible packaging bag equipped with a film-like non-return nozzle and having excellent non-return function and liquid drip-controllability, and excellent spouting characteristics of a liquid-like packaged content as a filled stuff (capable of smoothly spouting the content in the bag to the last). <P>SOLUTION: In the flexible packaging bag with the film-like non-return nozzle 1 being projected therefrom, a packaging bag body 2 is constituted of a laminate film in which a non-sealing part of at least one of surface and back side flexible laminate films has an uneven structure at least in a vicinity of an upper portion or a side edge on the film-like non-return nozzle side. A space of the surface and back side flexible laminate films is &ge;20 &mu;m in the uneven structural part. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a flexible packaging bag formed by projecting a film-like check nozzle (liquid pouring nozzle) with a self-seal check function constituted by two or two superposed front and back soft laminated plastic films. Is.

As a flexible packaging bag having a self-sealing check function made of a soft laminated plastic film and having a self-checking check function, that is, a film-like check check nozzle, those disclosed in Patent Documents 1 and 2 according to the proposals of the inventors There is.
JP 2005-15029 A JP-A-2005-59958

The packaging bags disclosed in Patent Documents 1 and 2 are liquids that contain only liquid packages by filling a liquid such as soy sauce or other liquid seasonings or salad oil in a liquid. Used as a product-packaging package. When a liquid package is poured out from the liquid-filled package, the package is not exposed to the atmosphere at all.
Therefore, since the liquid package to be packaged hermetically sealed in such a packaging bag does not cause chemical changes such as oxidation, there is an advantage that it can be maintained in its original state for a long time.

By the way, the film-like non-return nozzle of the conventional packaging bag exhibits a self-seal non-return function by the diffusion of the intervening liquid material by the capillary action between the two front and back soft laminated plastic films. The main body also contracts or collapses due to the capillary action of the liquid package filled with the seal in the liquid in a state where the area corresponding to the amount corresponding to the dispensed amount is in close contact.
And this will sometimes hinder the smooth outflow of the package in the bag due to the strong adhesion between the front and back films described above when the liquid package in the packaging bag is next poured out. There was a case.

  In addition, the conventional packaging bag is basically filled with the liquid bag to be packaged by liquid seal filling, but sometimes it is completely gasless filling. When it is not possible, the built-in gas of the package may be generated after filling and collected in the bag, and this gas may interfere with the check function of the film check nozzle. I understood.

  Therefore, the present invention has an excellent non-return function and liquid drainage and is particularly suitable for solving the above-mentioned problems of the prior art, and is a filling property of a liquid package as a filling material ( We propose a non-self-supporting flexible packaging bag with a film-like check nozzle that is excellent in that the packaged items in the bag can be poured smoothly to the end.

As a result of intensive studies to achieve the above object, the inventors have arrived at the configuration of the present invention having the following summary configuration.
That is, in the present invention, a film-like non-return nozzle that projects a non-return function under the interposition of a liquid material between overlapping plastic films protrudes from the side of a packaging bag body made of a soft laminated film. In the flexible packaging bag, the packaging bag main body is formed of a laminated film having a concavo-convex structure at least on the upper side or in the vicinity of the side edge on the film check nozzle side of at least one soft laminated film on the front and back sides. Proposed is a flexible packaging bag having a check function nozzle characterized in that the gap between the front and back soft laminated films is 20 μm or more at the concavo-convex structure portion.

In the present invention, the flexible packaging bag is
(1) The concavo-convex structure formed on the laminated film is embossed, blasted, knurled, wrinkled, vertical / horizontal striped, planar, island-shaped, striped on one or both of the front and back soft laminated films. To have been formed as a partial pattern or a full pattern,
(2) The film-like non-return nozzle is formed by fusing one or two overlapping soft laminated plastic films together at the peripheral portion except the portion serving as the nozzle base end, and non-fused at the central portion. A dispensing passage is defined, and the base end of the packaging bag body is fused and joined to the side of the packaging bag body. When the packaged bag body is tilted, The inner surface of the laminated film in which the inside of the pouring passage becomes wet as the article to be packaged passes through the close contact action of the article to be packaged on the inner surface of the pouring passage. To demonstrate a check function to prevent the intrusion of
(3) The film-like check nozzle has a concavo-convex structure on the nozzle base end side excluding the planned tearing position and its vicinity of at least one soft laminated plastic film on the front and back sides,
(4) The base end portion of the film-like check nozzle has a sealant layer facing to be fused at a low temperature, and the inner surface of the dispensing passage is temporarily sealed,
(5) The packaging bag body has a gas reservoir space at a position higher than the upper edge of the film-like check nozzle in the upper horizontal seal portion thereof,
However, this is a more preferable solution.

  According to the present invention, by adopting a novel structure of a flexible packaging bag having a liquid pouring nozzle, that is, a film-like check nozzle having a self-seal check function, an article to be packaged filled with a liquid seal (basic In addition, it is possible to prevent quality deterioration such as oxidation of a liquid-less packaged product that is gaslessly filled), and at least a part of the laminated film constituting the packaging bag body has a concavo-convex structure. Thus, smooth pouring can be performed at any time, for example, at the time of re-pouring.

  Further, according to the present invention, the pouring can be smoothly performed by adding the concavo-convex structure formed on the packaging bag body, while the film check nozzle is cut at a predetermined position to form an opening (opening the packaging bag). After that, not only when the packaged item is poured out, but also after the dispensing is stopped, it is possible to reliably prevent the outside air from entering the packaging bag. It can be kept fresh.

Here, when the inner surface of the nozzle base end portion is in a temporarily sealed state by low-temperature fusion processing, a flexible packaging bag with a film-like check nozzle that does not impair check function characteristics during handling or the like is provided. be able to.
In addition, when a concavo-convex structure is provided at least on the base end side excluding the position to be cut and its vicinity of the film check nozzle, it is possible to provide a packaging bag having excellent pouring characteristics as the entire flexible packaging bag. .

  The flexible packaging bag of the present invention is basically a soft and thin laminated plastic film 2 on the upper part of one side edge of a packaging bag body made of a soft laminated film of two or three layers. Sheets (a pair of front and back) face each other, and a non-return function is exerted by the presence of a liquid substance by capillary action in the extraction passage formed between the overlapping films. A film-like check nozzle (liquid dispensing nozzle as disclosed in Japanese Patent Application Laid-Open No. 2005-59958) fused in a state of protruding sideways or obliquely upward, or integrated with the packaging bag body Formed.

  Here, the film-like non-return nozzle is formed on the inner surface (sealant layer) of the upper side edge of the packaging bag body through a sealant layer that is the outermost layer of the soft laminated plastic film constituting the nozzle. The base end is fused and joined, and the pouring passage provided in the nozzle and the inside of the bag body are communicated. For example, this nozzle comprises a thermoplastic, uniaxially or biaxially stretched base film layer, and sealant layers on both sides of the front and back, and laminated films on each side of the front and back, for example, two sheets The sealant layers facing each other in a pair of laminated films, or the laminated films facing each other of one laminated film folded back to half width, are fused together at the peripheral portion excluding the base end, and as a whole It has a substantially wedge shape and is formed so as to be a pouring passage where the central portion is not fused.

This film check nozzle is typically one having a projection length X from the packaging bag body of about 30 to 100 mm and a nozzle minimum width tip position Y of about 20 to 80 mm. Although the bag body is different depending on the weight of the package, generally, a thick laminated two-layer film of NY15 / PE60 is used, whereas this non-return nozzle is subjected to the load of the package. Therefore, it is preferable to use a thin three-layer laminate film of PE20 / NY15 / PE20. The thinner the film, the better the thin film, and the better the check function.
If possible, a non-return effect can be obtained when the pair of overlapping front and back films has higher flatness (flatness).

  Such a film-like check nozzle uses, for example, a polyethylene layer, a polypropylene layer, ethylene vinyl alcohol (EVA), an ionomer, EVOH, or the like between two overlapping films (facing the front and back) and a pair of laminated films. The sealant layers are preferably bonded to each other by, for example, heat sealing, high frequency sealing, impulse sealing, or the like, leaving the inner edge portion so as to have a desired shape (wedge shape). Can be manufactured.

  A film-like check nozzle made of a soft laminated plastic film having a three-layer structure (sealant layer base film layer sealant layer) manufactured in this manner has a sealant layer as an outer surface of a base end portion thereof. It is fused by heat sealing to the sealant layer (sealant layer made of the same kind of film) on the inner surface of one side of the packaging bag body made of a soft laminated film (mainly two layers) and protrudes from the packaging bag body Installed in the finished condition. Thereby, a flexible packaging bag provided with the film-like non-return nozzle which protruded outward from the upper part of the side edge, the top part, etc. with respect to the packaging bag main body is obtained.

  By the way, mutual fusion of the sealant layers on the inner surface of the film check nozzle when the outer surface of the base end of the film check nozzle is fusion bonded to the inner surface of the side of the packaging bag body. To prevent this, insert a release sheet that has a higher melting point or is not heat-melted inside the base end of the nozzle that leads to the dispensing passage, and set the sealing temperature of each sealant layer on the inner and outer surfaces of the nozzle. For example, it is preferable that the melting point of the sealant layer on the inner surface of the nozzle is made higher than that of the sealant layer film on the outer surface of the nozzle by changing the materials or changing the extrusion lamination conditions.

Here, liquid seasonings including soy sauce and other solids such as sesame, soups and other liquid packages in the packaging bag body (even if slightly larger solids are enclosed in these liquids) The filling of (possible) can be performed at the same time as or after the joining step of the film-like check nozzle to the packaging bag body (heat seal).
For such liquid filling and packaging, for example, filling is performed by a submerged sealing method (submerged seal filling is performed so that air, nitrogen gas, etc. are not mixed in) or packaging is performed. Filling is performed by sufficiently excluding gas from the inside of the packaging bag body by, for example, evacuating the bag after filling the product. The reason is that, in order for the film-like check nozzle to exhibit the check function, it is necessary to seal the package contents in the bag in a deaerated state. Moreover, this is preferable when preventing the oxidation etc. of a to-be-packaged object.

By the way, the liquid package to be filled in the flexible packaging bag is opened by cutting off a planned opening portion (a position where a tear guide rod or notch is added) formed near the tip of the film check nozzle. By doing. That is, after the nozzle is opened, the main body of the liquid-filled package can be tilted so that the nozzle opening (pouring spout) faces downward.
In this case, the film-like non-return nozzle made of a soft laminated film is separated from the front and back sides by the action of the water head pressure of the article to be packaged or the pressure of the body of the liquid-filled package by fingers. At the same time as opening the exit passage, the nozzle opening is opened to allow the article to be packaged.

  In addition, when a package object is poured out through the nozzle opening (pour spout) of the film-like check nozzle, the packaging bag body made of a soft laminated film is in the form of the film, regardless of the dispensing of the package object. Since there is no suction (backflow) of outside air from the check nozzle, the packaging bag body contracts or collapses by an amount corresponding to the volume of the poured bag.

As described above, the liquid-filled package formed by filling the flexible packaging bag with the liquid material can inject a required amount of the packaged material from the bag by tilting the package. When the body is returned to the original standing posture, the outflow of the article to be packaged from the nozzle opening is stopped.
Due to this stoppage of the outflow, the liquid packaging material is always wet throughout the discharge passage of the film check nozzle due to the capillary action. Therefore, at the same time as this stop, the inner surfaces of the dispensing passages are in close contact with each other by the capillary action, and the nozzle opening provided at the nozzle tip remains in close contact. Invasion into the body is surely prevented.
Therefore, in a packaging bag having such a film-like check nozzle, the liquid package packed in the bag is in contact with the outside air not only before but also during and after the dispensing. Therefore, it is possible to effectively prevent oxidization and fouling of the package contents in the bag.

The film structure of the packaging bag body as a constituent element of the present invention is such that the base film layer located on the outer surface and the sealant layer located on the inner surface are each of the same kind as that of the film check nozzle. And can be a sealant layer.
However, when the film-like check nozzle and the packaging bag main body are configured separately, an intermediate layer can be interposed between them. Preferably, the sealant layer forming the inner surface of the packaging bag body made of a soft laminated film is made of the same kind of resin material as the outermost sealant layer of the nozzle. According to this, the fusion-bonding strength of the packaging bag body of the nozzle can be sufficiently increased.

  For example, in a soft laminated film for a packaging bag body having a two-layer or three-layer structure, the uniaxial or biaxially stretched base film layer is a polyethylene terephthalate film layer (PET layer) having a thickness of 8 to 30 μm or a nylon resin film layer ( NY layer), ethylene vinyl alcohol (EVOH) or the like. Moreover, the sealant layer of the soft laminated film used for the packaging bag body can be composed of an unstretched PE layer or PP layer having a thickness of 10 to 60 μm, an EVA layer, an ionomer layer, an EVOH layer, or the like.

By the way, when the thickness of the base film layer is less than 8 μm, water vapor impermeability, gas barrier properties and the like may be insufficient. On the other hand, when the thickness exceeds 30 μm, the flexural strength of the soft laminated film is low. There is a possibility that the adhesiveness of the inner surface of the extraction passage after the stop of the extraction of the packaged goods is impaired due to the excessive increase.
Moreover, about the sealant layer, when the thickness is less than 10 μm, there is a possibility that sufficient sealing strength cannot be secured, and when it exceeds 60 μm, the bending strength of the soft laminated film may be excessively increased. As long as this thickness is compensated in total, each sealant layer can be composed of two or more films.

Moreover, as a soft laminated film used for this packaging bag main body, since a fixed amount of liquid material is filled, a strong film is required. In the present invention, the bending strength per unit width (15 mm) of the soft laminated film, in other words, the waist is measured using a waist measuring device as disclosed in FIG. 10 of JP-A-2005-59958. It is preferable that the measured value is 40 to 300 mN.
If the waist is less than 40 mN, the stability of the direction of the pouring of the packaged item from the packaging bag is inferior. There is a risk that the lack of strength will become apparent. On the other hand, if it exceeds 300 mN, the entire check function including the film check nozzle may be lowered regardless of the laminated structure of the laminated film.

By the way, the flexible packaging bag of the present invention, in which the above-described film-like check nozzle is protruded from the packaging bag body having such a film configuration, corresponds to the case of repeated dispensing, particularly re-pouring. Even in this case, it is desirable that the controlled predetermined amount can be smoothly poured out as in the first case.
Therefore, in the present invention, as shown in FIG. 2 with dots, it is at least a laminated film of at least one of the front and back sides of the packaging bag body, the bag seal (horizontal seal, vertical seal, nozzle and body A portion having a concavo-convex structure 14 which is subjected to embossing, blasting, knurling, wrinkle processing, vertical / horizontal stripe processing, etc., is used except for the portion where the joint seal is formed.
The reason for excluding the seal portion is that if there are irregularities in the seal portion, a seal failure will occur.

  The reason why such a concavo-convex structure 14 is mainly formed in the packaging bag body 2 is that after the liquid package is poured out by the action of the film check nozzle, the check of the film check nozzle Not only the action but also the inside of the packaging bag body is prevented from entering the outside air (back flow), and under the intervention of the liquid package, a capillary action works between these soft laminated films, and the films are strong. It will be in close contact. In other words, the inside of the packaging bag body is in a state in which the film shrinks or the bag body is deformed by the volume corresponding to a considerable amount of the poured liquid, and the respective soft laminated films are in close contact with each other. become.

  As a result, there is a sufficient amount of liquid (liquid height) in the packaging bag body when the filled liquid package is poured again through the film-like check nozzle (when the head pressure is high). The smooth pouring is compensated to some extent, but when the amount of liquid in the bag decreases, the head pressure decreases, and the pouring pressure loses the adhesive force due to the capillary action between the laminated films, so that smooth pouring is possible. Dispensing and liquid return are impeded.

Moreover, when the amount of liquid in the bag is reduced, wrinkles are generated in the main body of the packaging bag, and this acts as a weir, so that the liquid flow is stagnated and the liquid flow path is cut off to smoothly pour. It becomes difficult to put out.
On the other hand, when the pressurizing force of the bag body portion is increased in order to secure the pouring amount, an unintended excessive amount may be discharged, and stable pouring cannot be ensured.

In order to eliminate such adverse effects, the present invention slightly relaxes the adhesive force of the laminated film based on the capillary action in the vertical and horizontal ranges at least in the vicinity of the film-like check nozzle of the packaging bag body, The stagnation, stagnation and clogging were prevented and the flow path was secured.
In other words, in the present invention, in order to relieve the adhesive force due to the capillary action that occurs in the dispensing passage of the film check nozzle and the packaging bag body, without reducing the check action of the film check nozzle, At least one of the soft laminated films for the packaging bag body to be overlaid is embossed or blasted to give the concavo-convex structure 14 so that the capillary action does not work or weakens.

The packaging bag main body 2 has a gap between the soft laminated films on the front and back of the packaging bag main body (excluding vertical seal, horizontal seal, and a joint seal portion between the nozzle and the main body), that is, a liquid layer interposed in the gap. Since the thickness is usually about 2 to 5 μm and the adhesion force based on the capillary action described above is generated, in the concavo-convex structure 14 portion provided in the soft laminated film, one or both of the soft laminated films are formed by, for example, embossing The film is provided with irregularities so that the gap between the films is 20 μm or more, preferably 30 μm or more, more preferably 50 μm or more.
In this case, the capillary action of the packaging bag body 2 is completely lost or reduced, and the adhesion between the laminated films is reduced. As a result, at least at the location where the concavo-convex structure 14 is provided, the flow path is always secured, and even when the amount of liquid in the bag is extremely reduced, the liquid packaged item is always smooth. Dispensing is ensured.

The above uneven processing is preferably processing that gives an irregular pattern in addition to a regular pattern using an embossing roll (Japanese Patent Laid-Open No. 2008-12669) having an uneven pattern such as a cylinder or a prism.
Further, instead of such embossing, random wrinkling, blasting, knurling, vertical and horizontal striped processing may be performed. These are desirably combined in such a way that the uneven positions are displaced and a gap of 20 μm or more is formed. For example, in a bag making machine, it can be molded using a hot roll (70 to 80 ° C.) before bag making (before vertical sealing) or after bag making.

The inventors filled a soy sauce as a material to be packaged in a packaging bag body having a soft laminated film configuration of Tech Barrier NY15 deposition surface / deposition surface Tech Barrier PET12 / XA-HD40, and this packaging bag body, That is, an experiment was conducted to incline the liquid-filled package and measure the remaining amount when the liquid no longer comes out.
As a result, as shown in Table 1, it was found that the effect was remarkable when a soft laminated film subjected to uneven processing was used. In addition, in this experiment, as shown in FIG. 1, the embossed concavo-convex pattern in the vicinity of the film-like check nozzle of the wrapping bag main body is formed into a vertically striped pattern, Compared. As a result, in the example suitable for the present invention, the remaining amount was small, it could be used up to the end, and the pouring could be performed smoothly.

In the present invention, the concavo-convex structure 14 is applied as one or more patterns in the longitudinal direction along at least a part of the non-sealed portion of the packaging bag body, that is, the upper side or the bag side edge on the film-like check nozzle 1 side. Is effective for securing the flow path at the time of re-pouring.
In addition, various patterns illustrated in FIGS. 2A to 2H are effective, and these are applied in the form of a partial pattern or a full pattern as a planar shape, an island shape, or a stripe shape.

Next, specific forms of the flexible packaging bag according to the present invention will be described with reference to the drawings.
The flexible packaging bag shown in FIG. 2 is an example in which a film-like check nozzle 1 protrudes from, for example, the upper left edge of a packaging bag body 2 made of a soft laminated film, and the inner surface of the joint portion of the bag body 2 The outer sealant layer at the base end of the film check nozzle 1, preferably a sealant layer made of the same kind of resin material as the sealant layer of the packaging bag body, is heat-sealed on the side sealant layer. It has been fusion bonded. In some cases, it is preferable that the sealant resin on the inner surface of the spout passage of these fusion-bonded portions has a high melting point, and the temporary sealing portion 12 is formed by fusing this portion at a low temperature.

  Here, the film-like check nozzle 1 is formed on both sides of a thermoplastic base film layer, for example, a biaxially stretched PET layer or NY layer having a thickness of 5 to 40 μm, preferably 10 to 30 μm, and the base film layer. Each laminated layer of sealant, for example 5 to 80 μm, preferably 10 to 60 μm thick unstretched PE layer or PP layer, which is a laminated film disposed on each side of the front and back, ie, Peripheral portion excluding the base end side of the laminated film of two front and back surfaces, such as wedges with the same contour shape, or one laminated film folded back to the front and back at the center, with the inner surface side sealant layer facing each other Thus, it can be constituted by fusing each other as shown by hatching in the figure, preferably by heat sealing.

  By the way, such a film-like non-return nozzle 1 is, as shown in FIG. 3, an enlarged cross-sectional view along the line IIII-III in the nozzle width direction of FIG. 3 and 4 have a three-layer structure of base film layers 5, 5 ′ and sealant layers 6, 6 ′, 7, 7 ′ laminated on both sides of the base film layers 5, 5 ′. The opposing inner surface side sealant layers 6, 6 'are suitable over a predetermined width, for example, a width of 0.5 to 3 mm, preferably a width of 1.0 to 2.0 mm, at the peripheral edge portion excluding the base end side. Can be manufactured simply and quickly by fusing to a desired shape (wedge shape) by heat sealing.

In order to provide an excellent check function, it is preferable that such a film-like check nozzle 1 is formed by laminating and laminating as soft as possible a soft laminated plastic film.
And in the base end part of this nozzle, the sealant layers 7 and 7 'on the outer surface side are fused to the inner surface (sealant layer) of the packaging bag body 2 preferably by heat sealing, so that the packaging bag body 2 can be joined appropriately, reliably and easily.

  The outer surface of the film check nozzle 1, that is, the outer surface of the outer sealant layers 7, 7 ′ from the planned tear line (scheduled opening portion) to the base end side is prevented from dripping out of the liquid. It is preferable to provide a coating layer (water-repellent or oil-repellent coating layer) 10 of a water-repellent agent or an oil-repellent agent for improvement as shown by applying dots in FIG. 4 along at least the opening end and the lower edge portion. . At the same time, it is preferable to provide a wetting treatment layer 11 for assisting the check function on the inner surface of the inner sealant layer 6 of the film check nozzle 1, particularly the inner surface of the dispensing passage 13.

  The film-like check nozzle 1 configured as described above is, for example, filled with the liquid seal of the package in the packaging bag body made of the soft laminated film or prior to filling the package with the liquid seal, for example, The sealant layers 7 and 7 ′ on the outer surface of the base end of the nozzle 1 are preferably bonded to the inner surface of the packaging bag body 2 at the fusion part between the sealant layers on the side of the packaging bag body 2, preferably by heat sealing. A part of the packaging bag is formed by fusion-bonding, and the packaging bag body 2 is protruded laterally from the upper end portion in FIG.

In the flexible packaging bag 8 of the present invention, it is possible to fill the liquid package with a seal in the liquid so that the gas does not enter the packaging bag. Necessary for fully exhibiting the stopping function.
However, sometimes a very small amount of outside air may enter during pouring, and the gas contained in the package itself may be generated in the bag afterwards. In order to store and ensure the non-return dispensing from the film-like check nozzle 1, the upper side of the packaging bag body 2, that is, the upper side seal portion located above the film-like check nozzle 1, If necessary, it is preferable to provide one or more gas reservoir spaces 18 as shown in FIGS. 1 and 4 in the width direction of the bag.

  Such a flexible packaging bag is filled with a liquid material to be packaged in a liquid seal, preferably under evacuation, to obtain a liquid-filled package 8 having a full form as illustrated in FIG. However, a soft flexible packaging bag itself usually does not have a self-supporting property or a fixed form, so that it is shown in FIG. 6 and will be described in detail later in transporting, storing, displaying, and using a packaged item. In addition to such a self-supporting outer packaging container 9 and a hard container, for example, it is housed in a standing pouch 9, and the pouch 9 is provided with a self-supporting property and a formability according to its inherent rigidity so as to become a use form. It is preferable to do.

  When the flexible packaging bag is used, the tip end side of the tearable portion of the film check nozzle 1 is removed by tearing or excision to secure a nozzle opening, that is, a spout. For example, in a posture in which the standing pouch 9 is tilted, the liquid package is poured out without intruding or inhaling outside air from the spout provided in the film check nozzle 1. On the other hand, as the standing pouch 9 stops pouring based on the upright return, the inner surface of the film-like check nozzle is moved under the presence of a liquid film composed of a liquid package to wet the inner surface. It adheres over the whole and prevents the outside air from entering the packaging bag body 2 with certainty.

  According to this, the filled package obtained by filling the packaged bag body 2 with the liquid packaged product in the liquid is subjected to shrinkage or crushing deformation corresponding to the packaged product extraction amount. The packaging bag main body can be poured out without taking in outside air into the body, and after the pouring is stopped, it has a close sealing by the non-return function of the inner surface of the pouring passage of the film check nozzle. By preventing the outside air from entering the inside, it is possible to sufficiently prevent the object to be packaged remaining in the packaging bag body from being contaminated by the outside air, oxidation, and the like.

After the required amount of liquid package has been dispensed, the standing pouch 9, which is a self-supporting outer packaging container, is returned to an upright position and the dispensing is stopped, whereby the tip of the film check nozzle 1 is stopped. The spout provided in the section is automatically closed and closed.
Here, the close contact due to this check function of the film check nozzle 1 is the same as described above, when the film check nozzle 1 is released from the hydraulic head pressure, and the soft laminated plastic film 3 on the front and back sides. 4 return to the original shape at the time of manufacture of the film-like check nozzle 1 and when the articles to be packaged in the film-like check nozzle 1 flow back into the packaging bag body 2, the front and back films 3, 4 Is placed in a reduced-pressure atmosphere, so that the inner surface of the soft film (sealant layers 6 and 6 ') is brought into contact with the inner surface by the capillary action under the presence of a liquid package attached to the inner surface. This is performed by, for example, being negatively adsorbed to each other.
Further, the close contact between the films based on such a self-seal check function is more reliable when the packaging bag body 2 that has been crushed and deformed tends to depressurize the inside of the packaging bag body 12 based on the inherent elastic restoring force. Will be maintained.

  The film-like check nozzle 1 used in the present invention has a base end portion protruding from the side portion of the soft packaging bag body 2, most of which protrudes from the upper end portion of the side portion, and the outer surface side has a low melting point. By using a high-melting-point sealant layer as the sealant layer on the inner surface side of the film check nozzle 1 while being fused and bonded to the low-melting-point sealant layer on the inner surface of the packaging bag body 2, for example, It is preferable to use the temporary sealing portion 12 (see FIG. 1) fused at a relatively low temperature with an adhesive strength that is less than half of the heat seal strength.

  However, in the formation of the temporary sealing portion 12 described above, the formation position thereof corresponds to the position where the “base end portion” of the film-like check nozzle corresponds to the fusion bonding position to the packaging bag body 2, Alternatively, the position may be slightly deviated to the inside of the packaging bag body 2 from the corresponding position, or conversely, the position may be slightly deviated to the outside of the packaging bag body from the corresponding position. Even in such a case, the portion for forming a package extraction passage having a length (about 5 to 8 mm) sufficient for the film-like check nozzle to perform its original function is provided outside the temporary sealing portion 12. It is necessary to remain in

  Here, in the formation of the temporary sealing portion 12, a high melting point sealant layer and a low melting point sealant layer are selectively used. Both of these sealant layers are low density containing linear low density polyethylene. In addition to being formed of polyethylene, the high melting point sealant layer may be formed of medium density or high density polyethylene, and the low melting point sealant layer may be formed of low density polyethylene. In addition, the selection of the high or low melting point of the polyethylene made of the same material can be realized, for example, by mutually changing the extrusion laminating conditions and the like when laminating the sealant layers.

  Here, the temporary sealing portion 12 by low-temperature fusion reduces at least one of the heating temperature, pressure, and pressurization time of the heat sealing means as compared with the case of forming a complete fusion bonded portion. Can also be realized.

  And in any case mentioned above, the heat seal strength of the temporary sealing portion 12 is 0.3 to 3 (N / 15 mm), particularly 0.5 to 2 (N / 15 mm). , 0.7-1 (N / 15 mm) is preferable, the opening load of the temporary sealing portion 12 is 50-350 (N), especially 80-300 (N), in particular, 100 It is preferable to set it as the range of -200 (N).

  In the present invention, in the flexible packaging bag provided with the above-described film-like check nozzle, preferably, as described above, the film-like check nozzle is in the vicinity of the fusion-bonding position to the packaging bag main body 2. For example, a temporary sealing portion of a liquid article to be packed and packaged in a packaging bag provided with a temporary sealing portion 12 having a heat sealing strength less than half of the original heat sealing strength at the base end portion of the check nozzle. By preventing the inflow to the nozzle tip side more reliably by the temporary sealing portion 12, even if the packaged object is heated to 50 to 100 ° C., A large part of the package dispensing passage can be sufficiently protected from permanent deformation in the direction in which the dispensing passage is inflated.

  Therefore, the function of the film check nozzle 1 can always be sufficiently exerted on the portion of the film check nozzle on the tip side from the temporary sealing portion, so that the article to be packaged can be poured out from the packaging bag. In this case, it is possible to completely prevent the outside air from entering the packaging bag main body, and to fully exhibit the self-seal check function when the packaged article is stopped.

  By the way, when the packaged material in the bag is cooled to near normal temperature, the packaged product is temporarily sealed by applying a load in the thickness direction of the packaging bag, for example. The stopper 12 is opened, and the tip portion of the film-like check nozzle is cut or removed to form a spout, and in this state, the packaging bag is tilted so that the spout is directed downward. And

  Here, since the other fusion-bonded portions of the packaging bag excluding the temporary sealing portion 12 are heat-sealed with, for example, twice or more the strength of the temporary sealing portion 12, the temporary sealing portion. Even if a load necessary to open 12 is applied, an unexpected bag breakage does not occur.

  For this reason, the film-like check nozzle 1 part that has not been subjected to the full deformation due to the heated packaged object is used to package the intrusion of outside air into the packaging bag body 2 due to the extraction of the packaged article in the bag. Under the deformation of the bag body 2 can be effectively prevented when the spout is fully open as necessary, and when the wrapping of the packaging bag is stopped based on the return to the standing position, Intrusion of outside air into the packaging bag body can be surely prevented by the self-seal check function by returning the pouring nozzle portion wet to the packaged object to the original shape.

  Here, when both the high melting point sealant layer and the low melting point sealant layer are formed of low density polyethylene, or the high melting point sealant layer is formed of medium density or high density polyethylene, and the low melting point sealant layer is formed of low density polyethylene. In any case, the temporary sealing having the sealing strength as expected and the required fusion bonding of the film-like check nozzle can be realized easily and easily.

Moreover, in any of the packaging bag and the packaging bag described above, the heat seal strength of the temporary sealing portion 12 is 0.3 to 3 (N / 15 mm), particularly 0.7 to 1 (N / 15 mm). The above-mentioned range prevents accidental opening of the temporary sealing portion 12 while intentionally opening the temporary sealing portion without affecting the other fusion bonded portions. Is preferable.
That is, if it is less than 0.3 (N / 15 mm), there is a possibility that unintentional opening may occur in the temporary sealing portion 12 under the relation with the volume of the liquid package in a heated state, On the other hand, if it exceeds 3 (N / 15 mm), the load required to open the temporary sealing part 12 may have an unexpected influence (bag breaking or opening) on other fusion bonded parts or the like. .

By the way, the load for opening the temporary sealing portion 12 should be in the range of 50 to 350 (N), particularly 100 to 200 (N), without incurring bag breakage at other locations including the sealing portion. Effective to prevent accidental opening during transportation and work.
That is, when the opening load is less than 50 (N), there is a possibility that the temporary sealing portion may be opened by the lower packaging bag due to the stacking of the packaging bags filled and packed with the objects to be packaged. ) Or the heat seal strength is too high, other fusion bonded parts may be affected by the load required to open the temporary sealing part.

  According to the study by the present inventors, for example, the base end portion of the film-like check nozzle as shown in FIG. 1 is formed at a low temperature melt on the upper side edge of the flexible packaging bag body 2 (NY15 / PET12 / LLDPE40). The laminated structure of the film-like non-return nozzle film is a linear low density polyethylene layer (low melting point sealant layer) / biaxially stretched polyethylene terephthalate layer / linear chain. Heat of the temporary sealing part when this laminated film is heated and pressurized at a cylinder pressure of 300 kPa for 3 seconds with a heat sealer with a cylinder, using the heat sheet temperature as a parameter, as a low-density polyethylene layer (high melting point sealant layer) Seal strength (N / 15mm) was measured with a tensile tester (TENSILON RTG-1300) at a tensile rate of 200mm / min. It was measured under the conditions of 15mm. The results are shown in Table 3.

  As the self-supporting outer packaging container 9 used for storing the above-described non-self-supporting liquid-filled packaging body 8, at least the lower part is preferably formed of a laminated film having a cylindrical bag shape, In particular, a flat bottom 16 is provided at the lower end so that it can stand on its own. The outer packaging container 9 is provided with an overhanging sachet 9a that surrounds the nozzle and has the same shape as that of the film check nozzle at the upper part of the side corresponding to the film check nozzle 1. A protruding one is suitable, for example, a standing pouch 9 is used.

  In addition, the outer packaging container 9 is preferably heat-sealed at the top with the top of the liquid filling package 8 to be stored as shown in FIG. 6, or as shown in FIG. It is preferable that the liquid material package can be stored in a replaceable manner so that the top portion can be opened and closed by the chuck 17 or the like.

  In such a liquid-filled packaging structure, the self-supporting outer packaging container 9 is composed of, for example, a laminated film including a uniaxial or biaxially stretched base film layer and a sealant layer, and the base film is a polyethylene terephthalate film layer. Alternatively, it is preferably made of a nylon resin film layer, while the sealant layer takes a form such as a standing pouch using a laminated film made of a polyethylene layer or a polypropylene layer. However, in the present invention, as the outer packaging container, not only such a bag-like standing pouch made of a flexible film, but also at least the main body portion may be another self-supporting cylindrical plastic container.

  And in the overhanging small bag 9a surrounding the nozzle provided on the one side upper part of the self-standing outer packaging container bag 9, there is an I notch at a position corresponding to the position of the tearing opening of the film check nozzle 1. A tearing guide rod formed by opening such as V notch, U notch, base notch and diamond cut is provided, and a cutout portion 15 for exposing the film check nozzle 1 as shown in FIG. 6 is provided. By cutting and opening the small bag 9a at the cutout portion 15, the above-mentioned non-self-supporting flexible packaging bag, that is, the protruding portion of the film-like non-return nozzle projecting from the liquid filling package 8 Can be exposed, and the nozzle opening is further opened for use.

After the liquid-filled package 8 is stored in the standing pouch 9, in some cases, as shown in FIG. 6, the upper end lateral seal portion 8 a is partially (spotted) on the upper side of the standing pouch 9. ) Or heat-sealed together over the entire width and stored in a suspended state. In such a case, the liquid-filled package 8 filled with the liquid can be held firmly in the standing pouch 9 and has an effect of assisting smooth outflow of the liquid package. .
In addition, in this case, the liquid filling package 8 can be sufficiently protected against various impacts during handling and distribution, and the liquid filling packaging 8 can be displaced. It is possible to prevent the occurrence of pinholes, the deformation and breakage of the film-like check nozzle, and the erroneous opening.

  Further, after the liquid-filled package 8 is stored in the standing pouch 9, it is in the vicinity of the film-like check nozzle 1, particularly in the vicinity of or at the bottom, or at one or more locations at the top of the packaging bag body, and further at the bottom. Fixing is effective in effectively acting when the entire liquid package is poured out smoothly to the end.

It is a front view which shows embodiment of the film-like non-return nozzle which concerns on this invention. 1 is a schematic diagram illustrating an uneven processing area of a laminated film 1. It is an expanded sectional view of the opening planned position of a film-like check nozzle. It is a front view which shows the state which provided the coating layer in the film-like check nozzle. It is a perspective view of a liquid filling package. It is a front view of a liquid substance filling packaging structure. It is a front view which shows the other form of a liquid filling packaging structure.

DESCRIPTION OF SYMBOLS 1 Film-like non-return nozzle 2 Packaging bag main body 3, 4 Laminated film 5, 5 'Base film layer 6, 6' Inner sealant layer 7, 7 'Outer sealant layer 8 Filling packaging body 9 Self-standing outer packaging container 10 Water-repellent and water-repellent Oil coating layer 11 Wetting layer 12 Temporary sealing portion 13 Outlet passage 14 Concave and convex structure 15 Cutout portion 16 Bottom portion 17 Chuck 18 Gas vortex space

Claims (6)

In the flexible packaging bag formed by projecting a non-returning film-like nozzle in the side part of the packaging bag body made of a soft laminated film and exhibiting a non-return function under the presence of a liquid material between the overlapping plastic films,
The packaging bag body is constituted by a laminated film having a concavo-convex structure at least on the upper side or in the vicinity of a side edge on the side of the film check nozzle, at least one of the soft laminated films on the front and back sides. A flexible packaging bag provided with a check function nozzle, characterized in that the gap between the front and back soft laminated films is 20 μm or more in the uneven structure portion.   The concavo-convex structure formed on the laminated film is obtained by embossing, blasting, knurling, wrinkling, vertical / horizontal stripe processing on one or both of the front and back soft laminated films in a planar shape, island shape, or stripe shape. The flexible packaging bag comprising the check function nozzle according to claim 1, wherein the flexible packaging bag is formed as a partial pattern or a full pattern. The film-like non-return nozzle is composed of one or two overlapping soft laminated plastic films that are fused together at a peripheral portion excluding the portion that becomes the nozzle base end, and is unfused into the central portion. The base end of this is fused and joined to the side of the packaging bag body,
When the article to be packaged is poured by tilting the packaging bag main body, the inner surfaces of the laminated films that are in a wet state when the article to be packaged pass through are in contact with each other. The non-return function nozzle according to claim 1 or 2, wherein the non-return function nozzle according to claim 1 or 2, which exhibits a non-return function for preventing intrusion of outside air by a close contact action caused by interposition of an object to be packaged on an inner surface. Flexible packaging bag provided.   The said film-like non-return nozzle has a concavo-convex structure in the nozzle base end part side except the tearing planned position of the at least one soft laminated plastic film of the front and back, and its vicinity. A flexible packaging bag provided with the non-return function nozzle described in 1.   The base end portion of the film-like check nozzle has a sealant layer facing to be bonded at a low temperature, and an inner surface of the dispensing passage is temporarily sealed. Flexible packaging bag with non-return function nozzle.   The said packaging bag main body has a gas reservoir space in the position higher than the upper edge of the said film-like non-return nozzle of the upper horizontal seal part, The reverse in any one of Claims 1-5 characterized by the above-mentioned. Flexible packaging bag with stop function nozzle.

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