JP2010023914A - Flexible packaging bag equipped with checking function nozzle and fluid material filling packaging structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non self-standing flexible packaging bag equipped with a film-like checking nozzle which is excellent in both a checking property in checking function and a liquid-draining property while being also excellent in a pouring property (capability of smoothly pouring out an in-bag packaged product to the last) of a liquid packaged object being a filling object. <P>SOLUTION: The flexible packaging bag has a film-like checking nozzle formed as a protrusion, and the non-sealed part of a packaging bag body is formed of a laminate film having a rugged structure formed in the vicinity of a side end at least at a film-like check nozzle side or an upper part. A liquid-state object filling and packaging structural body formed by storing the flexible bag in a self-standing outer packaging container is also disclosed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flexible packaging bag in which a film-like check nozzle (liquid pouring nozzle) having a self-sealing check function constituted by two laminated plastic films is provided, and the inside of the flexible packaging bag Further, the present invention relates to a liquid-filled packaging structure in which a non-self-supporting liquid-filled packaging body formed by filling various liquids or the like in a liquid is contained in a self-supporting outer packaging container.

A liquid dispensing nozzle made of a plastic film with a self-sealing check function, that is, a flexible packaging bag having a film-like check nozzle, as disclosed in Patent Documents 1 and 2 according to the proposals of the inventors There is. Since these flexible packaging bags are non-self-supporting packaging bags formed of a flexible laminated film, it is inconvenient to use them alone as they are. It took the form which accommodated and fixed in the container as described.
JP 2005-15029 A JP-A-2005-59958 JP 2004-196364 A

  The packaging bag disclosed in Patent Documents 1 and 2 is a liquid product made up of a substantially liquid package by filling a liquid material such as soy sauce or other liquid seasoning or salad oil in a liquid. Used as a filling 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, in the conventional packaging bag, the film-like check nozzle generates a self-seal check function by capillary action between the two front and back films. At this time, the packaging bag body also has a submerged seal. Due to the capillary action of the filled liquid to-be-packaged, the area corresponding to the amount corresponding to the amount to be dispensed is brought into close contact and contracted or crushed. And it turns out that this may actually hinder smooth outflow from time to time due to the strong adhesion between the above-mentioned front and back films at the time of the next dispensing of the liquid package in the packaging bag body. It was.

  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. If it is not possible, the packaged gas may be generated after filling and may accumulate in the bag, and this gas may inhibit the check action of the film check nozzle. It was.

  Moreover, the conventional packaging structure shown in Patent Document 3 needs to be fixed after the non-self-supporting flexible packaging bag is stored in the paper box, and the manufacturing process including the packaging is complicated and expensive. There was a problem.

Therefore, the present invention aims to solve the above-mentioned problems of the prior art, and in particular, is excellent in non-return function characteristics and liquid breakage, while, on the other hand, a liquid package to be filled is used. The object is to propose a non-self-supporting flexible packaging bag having a film-like non-return nozzle that is also excellent in dispensing characteristics (that the packaged items in the bag can be smoothly poured out to the end).
Another object of the present invention is to propose a liquid-filled packaging structure that can hold a non-self-supporting flexible packaging bag as it is.

  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, the present invention is a flexible product in which a film-like non-return nozzle that projects a non-return function is provided on the side of a packaging bag body made of a soft laminated film when a liquid material is interposed between overlapping plastic films. In the packaging bag, the packaging bag main body is constituted by a laminated film having a concavo-convex structure at least at the upper part or in the vicinity of the side edge on the film-like check nozzle side of at least one of the front and back laminated films. A flexible packaging bag having a non-return function nozzle is provided.

In the present invention, the flexible packaging bag is
(1) The concavo-convex structure formed on the laminated film is embossed, blasted, knurled, wrinkled, vertically / horizontal striped into one or both of the front and back laminated films into a planar shape, island shape, and stripe shape. Applied to be partly or entirely patterned,
(2) The film-like check nozzle is composed of two overlapping soft laminated films, the outer peripheral edge part excluding the part serving as the nozzle base end, and the central part serving as a dispensing passage. The base end of the packaging bag body is fused and joined to the side of the packaging bag body, and when the packaged article is poured out by tilting the packaging bag body, The non-return function for preventing the outside air from entering due to the mutual adhesion of the inner surfaces of the laminated film in which the inside of the pouring passage is in a wet state with the packaged material staying on the inner surface of the pouring passage To produce
(3) The film-like check nozzle has a concavo-convex structure on the nozzle base end side excluding the planned tearing position and the vicinity of at least one of the front and back laminated films,
(4) The base end portion of the film-like non-return nozzle has the sealant layer facing to be fused at a low temperature by a low melting point plastic film, 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 of the upper horizontal seal portion thereof,
However, this is a more preferable solution.

  In addition, the present invention has a film-like check nozzle that projects a check function when a liquid material is interposed between overlapping plastic films on the side of a packaging bag body made of a soft laminated film, In the packaging bag body, the non-sealed portion of at least one of the front and back laminated films is constituted by a laminated film having a concavo-convex structure at least in the upper part or in the vicinity of the side edge on the film check nozzle side. A self-supporting flexible packaging bag, a non-self-supporting liquid-filled packaging body in which a liquid or viscous packaged object is sealed in liquid, and a cylinder for storing the non-self-supporting liquid-filled packaging body One side of the container is provided with a tear guide rod for pulling out a nozzle for accommodating the film-like non-return nozzle in an exposed manner and pulling it out. Can and will be projected overhang pouch that, and a liquid product filling and packaging structures, wherein the freestanding outer packaging container which enables independence provided bottom plate, in that it consists.

This liquid-filled packaging structure is
(1) The concavo-convex structure formed on the laminated film is embossed, blasted, knurled, wrinkled, vertically / horizontal striped into one or both of the front and back laminated films into a planar shape, island shape, and stripe shape. Applied to be partly or entirely patterned,
(2) The film-like check nozzle is composed of two overlapping soft laminated films, the outer peripheral edge part excluding the part serving as the nozzle base end, and the central part serving as a dispensing passage. The base end of the packaging bag body is fused and joined to the side of the packaging bag body, and when the packaged article is poured out by tilting the packaging bag body, The non-return function for preventing the outside air from entering due to the mutual adhesion of the inner surfaces of the laminated film in which the inside of the pouring passage is in a wet state with the packaged material staying on the inner surface of the pouring passage To produce
(3) The film-like check nozzle has a concavo-convex structure on the nozzle base end side excluding the planned tearing position and the vicinity of at least one of the front and back laminated films,
(4) The base end portion of the film-like non-return nozzle has a sealant layer facing to be bonded at a low temperature by a low melting point plastic film, 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 of the upper horizontal seal portion thereof,
(6) The non-self-supporting liquid-filled package body has its upper end lateral seal portion fused to the upper end portion in the self-supporting outer packaging container and suspended in the self-supporting outer packaging container. Stored and held
(7) The self-supporting outer packaging container has a flat bottom at the lower end, and the top is a flexible packaging bag made of a soft laminated film that can be opened and closed to replace a non-self-supporting liquid-filled package. Being
However, this is a more preferable embodiment.

  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 degradation factors such as oxidation of a liquid-less packaged gasless filling), and at least a part of the laminated film constituting the bag body has an uneven structure. Thus, it is possible to provide a flexible packaging bag that enables smooth pouring at any time during re-extraction or the like.

  In addition, 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-like check nozzle is cut at a predetermined position and opened (opening the packaging bag). However, it is possible to reliably prevent backflow of air into the bag (air that flows in instead of the package being poured out) and keep the remaining package in the bag long and fresh. be able to.

  In addition, according to the present invention, by adopting a temporary sealing structure by low-temperature fusing treatment on the inner surface of the nozzle base end portion, a non-return function characteristic is not hindered during handling or the like. A flexible packaging bag can be provided. In addition, by providing a concavo-convex structure on the film base end side excluding at least the tear opening and its vicinity of the film check nozzle, it is possible to provide a packaging bag having excellent dispensing characteristics as a whole flexible packaging bag. .

  In addition, according to the present invention, a non-self-supporting flexible laminated film in which a non-self-supporting liquid-filled package formed by filling a liquid with a liquid in a non-self-supporting flexible packaging bag is not put into a hard package. In an outer packaging container such as a self-supporting flexible packaging bag (standing pouch: outer bag), preferably an empty bag is taken out and stored in a replaceable manner so that it can be used as it is. In addition, it is possible to stabilize the dispensing of the liquid package.

  Furthermore, according to the present invention, in the flexible packaging bag main body having the film-like check nozzle, by fixing the upper part of the liquid-filled packaging body in which the packaged object is sealed in the liquid to the upper part of the outer packaging container, The support form can be stabilized, and the packaged item can be stably poured out. Moreover, according to this invention, manufacture is easy and it contributes to suppression of product cost.

  The flexible packaging bag of the present invention is basically a soft and thin laminated film 2 on the upper side of one of the side edges of a packaging bag body composed of a soft laminated film of two or three layers. Sheets (a pair of front and back) face each other and the inside of the extraction passage formed between the overlapping films exhibits a check function by interposing a liquid material by capillary action. Film-like non-return nozzles (liquid pouring nozzles as disclosed in JP-A-2005-59958) are welded in a state of projecting in the side portions and obliquely upward, or formed integrally with the packaging bag body. Made up of.

  The film-like check nozzle, which is a characteristic configuration in the flexible packaging bag of the present invention, is, for example, the outermost layer of the laminated film constituting the nozzle on the inner surface (sealant layer) of the upper side portion of the packaging bag body. The base end portion of the nozzle is fusion-bonded via the sealant layer, and the pour-out passage provided in the nozzle is communicated with the inside of the bag body. For example, this nozzle comprises a thermoplastic, uniaxially or biaxially stretched base film layer, a sealant layer on both inside and outside, and a laminated film 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 in the peripheral part excluding the base part 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-like check nozzle typically has a protrusion length X from the packaging bag body of about 30 to 100 mm and a nozzle width Y of about 20 to 80 mm. For example, the packaging bag body Although this depends on the weight of the package, in general, the thick checkered two-layer laminated film of NY15 / PE60 is used, whereas this film-like check nozzle is not subjected to the load of the package. , PE20 / NY15 / PE20 is preferably a thin three-layer laminated film. 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). This can be manufactured.

  The film-like non-return nozzle made of a laminated film having a structure of at least three layers (sealant layer-base film layer-sealant layer) produced in this manner has a sealant layer, which is the outer surface of the base end portion, softened. The packaging bag is heat-sealed to a sealant layer (sealant layer made of the same kind of film) on the inner surface of the opening provided on one side of the packaging bag body made of a laminated film (mainly two layers). Mounted in a state protruding from the main body. Thereby, a flexible packaging bag provided with the film-like non-return nozzle which protruded outward from the upper part of the side part, the top, etc. with respect to the packaging bag main body is obtained.

  By the way, when the outer surface of the base end portion of the film-like check nozzle is fusion-bonded to the inner surface of the side opening portion of the packaging bag body, the sealant layers on the inner surface of the film-like check nozzle are mutually connected. In order to prevent mutual fusion of the nozzles, a release sheet having a higher melting point or not thermally melted is inserted into the base end portion of the nozzle connected to the dispensing passage, and the respective sealant layers on the inner and outer surfaces of the nozzle are inserted. The melting temperature of the sealant layer film 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, for example, changing the fusing temperature by changing the material or changing the extrusion lamination conditions, etc. It is realized by doing.

  Here, liquid seasonings including soy sauce and other solids such as sesame, soups and other liquid packaging materials (even if slightly larger solids are enclosed in these liquids) It is preferable that the film-like check nozzle is filled at the same time as the bonding (heat sealing) step to the packaging bag body or after the bonding step. 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 to cause the non-return action of the film-like non-return nozzle, it is necessary to perform sealing under the condition that the packaged material in the bag is sealed in the air and seal it. 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 and the body of the liquid-filled package body by the fingers. At the same time as the dispensing passage is formed, the nozzle opening is opened, and the packaged material is poured out.

  In addition, when a packaged item is poured out through the nozzle opening (spout) of the film-like check nozzle, the packaging bag body made of a soft laminated film is not covered with the packaged item. Because of the non-return function of the non-return check nozzle, there is no outside air suction (reverse flow), so 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 package always remains (stays) in the pouring passage of the film-like check nozzle due to the capillary action. Therefore, at the same time as the stop, the inner surfaces of the laminated film are in a state of being in close contact with each other by the capillary action, and the nozzle opening provided at the nozzle tip remains in close contact with the outside air into the packaging bag body. Will surely prevent intrusion.
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 main body according to the present invention includes a base film layer located on the outer surface of the packaging bag body and a sealant layer located on the inner surface, the same kind of base film layer and sealant layer as those of the film check nozzle. It can be. However, when the film-like check nozzle and the packaging bag main body are formed separately, an intermediate layer may be interposed between them, unlike the nozzle film. 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 laminated film having a two-layer or three-layer structure, a uniaxial or biaxially stretched base film layer of the laminated film is a polyethylene terephthalate film layer (PET layer) or nylon resin film layer (NY) having a thickness of 8 to 30 μm. Layer), ethylene vinyl alcohol (EVOH) and the like. Further, the sealant layer of the laminated film used for the packaging bag body may be constituted by 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 bending strength of the laminated film is large. Therefore, the adhesiveness of the inner surface of the nozzle after the stoppage of the packaged article may be impaired. 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 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 laminated film used for such a packaging bag body, since a certain 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 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, with respect to the packaging bag body having such a film configuration, the above-mentioned flexible packaging bag of the present invention in which the above-described film-like check nozzle is protruded corresponds to the case of repeated dispensing, particularly re-pouring. Even in this case, as in the first case, it is desirable to be able to pour a predetermined amount that is smooth and controlled.
Therefore, in the present invention, as shown in FIG. 2, at least as a laminated film of at least one of the front and back sides of the packaging bag body, a bag seal (horizontal seal, vertical seal, joint seal between the nozzle and the body) is provided. A portion having a concavo-convex structure 14 subjected to embossing, blasting, knurling, wrinkle processing, vertical / horizontal stripe processing, or the like is used. 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 (backflow), and the liquid crystal intervenes between these laminated films, and the capillary action works to make a strong close contact (non-return action). In particular, the inside of the packaging bag body is in a state in which the film shrinks or the bag body collapses by the volume corresponding to a considerable amount of the liquid liquid poured out.

  As a result, when filling the liquid package to be poured again through the film-like check nozzle, when there is a sufficient amount of liquid (liquid height) in the packaging bag body (water head pressure is When it is large), smooth pouring is compensated to some extent, but when the amount of liquid in the bag decreases, the water head pressure decreases, and the pouring pressure loses the adhesive force due to the capillary action between the laminated films, Smooth pouring and liquid return are impeded.

  In particular, when the amount of liquid in the bag is reduced, wrinkles are formed in the packaging bag body, which becomes a weir, the liquid flow becomes stagnant, and the liquid flow path is cut off, making it difficult to smoothly pour out. In some cases, if the pressure applied to the bag body is increased, an unintended excessive amount may be discharged, and stable dispensing 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 laminated films to be superimposed is embossed or blasted to give the concavo-convex structure 14 so that the capillary action does not work or weakens.

  The concavo-convex structure 14 added to the laminated film has a gap between the laminated films on the front and back of the packaging bag main body (excluding vertical seal, horizontal seal, and a bonded seal portion between the nozzle and the main body), that is, the thickness of the liquid layer is Usually, the adhesive force based on the capillary action described above is generated at about 2 to 5 μm, but one or both of the laminated films are embossed, for example, and the gap between the films is 20 μm or more, preferably 30 μm or more. More preferably, concavities and convexities are provided so as to be 50 μm or more. In this case, the capillary action completely disappears or becomes small, resulting in a decrease in adhesion between the laminated films. As a result, the flow path is always secured at least at the location where the concavo-convex structure 14 is provided, and even when the amount of liquid in the bag is extremely reduced, the liquid package is always smooth. 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. Moreover, it may replace with such embossing and may give a random wrinkle process, a blast process, a knurling process, and a vertical and horizontal striped process. These are desirably combined in such a way that the uneven position is shifted and a gap of 20 μm or more is formed. For example, in a bag making machine, a hot roll (70 to 80 ° C.) is formed before bag making (before vertical sealing) or after bag making.

  The inventors filled a packaging bag body having a laminated film structure of tech barrier NY15 vapor deposition surface / vapor deposition surface tech barrier PET12 / XA-HD40 with a soy sauce as a packaged material in a liquid, and this packaging bag main body, An experiment was conducted to tilt 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 the laminated film subjected to the uneven processing was used. In addition, in this experiment, as shown in FIG. 1, the case which put the uneven | corrugated pattern and vertical stripe pattern by embossing in the film-like non-return nozzle vicinity of this packaging bag main body, and the packaging bag main body which has not performed uneven | corrugated processing, 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 so that this portion is fused 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, Each side except for the base end of a laminated film of two front and back surfaces, such as a wedge shape with the same contour shape, or a single laminated film folded back to the front and back at the center, with the inner surface side sealant layer facing each other The parts can be constructed by fusing each other, preferably by heat sealing, as indicated by the hatching in the figure.

  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 and 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, in the peripheral 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 a check function, it is preferable that the film check nozzle 1 has a flat sheet as much as possible. And in this nozzle base end part, the outer surface side sealant layer 11 is suitably bonded to the packaging bag body 2 by fusing the inner surface (sealant layer) of the packaging bag body 2 preferably also by heat sealing. And it can be reliably and easily joined.

  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. A water repellent or oil repellent coating layer (water repellent, oil repellent coating layer) 10 for improvement is provided along at least the opening end and the lower edge. At the same time, a wetting treatment layer 11 for assisting the check function is provided 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, the self-sealing check of the film check nozzle 1 can be performed by filling a liquid package with a seal in the liquid so that gas does not enter the bag. Necessary for causing the action. However, sometimes a very small amount of outside air may enter during pouring, and the gas contained in the package itself may later be generated in the bag. In order to store such gas in position and to ensure non-return dispensing from the film-like check nozzle 1, the upper portion of the packaging bag body 2 of the present invention, that is, above the film-like non-return nozzle 1 is used. It is preferable to provide one or a plurality of gas reservoir spaces 11 as shown in FIGS. 1 and 4 in the bag width direction, if necessary, in the upper horizontal seal portion at the position.

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, it is preferable that the container is housed in, for example, a standing pouch 9 so that the pouch 9 is provided with a self-supporting property and a formability so as to be used.
Note that the dispensing in this example is performed by increasing the tilt angle of the self-supporting outer packaging container (hereinafter, described in the example of “standing pouch”) 9 in accordance with the decrease in the items to be packaged in the bag.

  The flexible packaging bag is used by tearing away or cutting away the tip of the film-like non-return nozzle 1 to be torn so as to secure a nozzle opening, that is, a spout. For example, in a posture in which the standing pouch 9 is tilted, the article to be packaged can be poured out without intrusion or inhalation of outside air from the spout provided in the film-like check nozzle 1. On the other hand, as the standing pouch 9 is stopped from pouring based on the upright return, the inner surface of the film-like non-return nozzle is placed under the interposition of a liquid film composed of a liquid package to wet the inner surface. Are closely adhered to each other to reliably prevent the outside air from entering the packaging bag body 2.

  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. It becomes possible to pour out without taking in outside air into the body at the same time, and after the pouring is stopped, the non-return function of the inner surface of the pour-out passage of the film-like non-return nozzle has a tight seal. By preventing the outside air from entering the packaging bag body, the object to be packaged remaining in the packaging bag body is sufficiently prevented from being contaminated by the outside air, oxidation, and the like.

After the required amount of liquid package has been poured out, the standing pouch 9 which is a self-supporting outer packaging container is returned to the upright position to stop the pouring, and at the same time, the film check nozzle 1 The spout provided at the tip is automatically closed and closed.
Here, the close contact due to the check function of the film check nozzle 1 is as described above, when the film check nozzle 1 is released from the water head pressure, and the laminated films 3 and 4 on the front and back sides. However, when the film-like check nozzle 1 returns to the original shape at the time of manufacture, and the packaged goods in the film-like check nozzle 1 are returned to the packaging bag body 2, the front and back films 3, 4 are in a reduced-pressure atmosphere. As a result, the inner surfaces of the soft films (sealant layers 6 and 6 ') are mutually negative over the entire nozzle width under the influence of the capillary action of the liquid package adhering to this surface. It is performed by pressure adsorption or the like. 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.

  Next, the present invention is also in a usage form of the liquid-filled package 8 in which the above-mentioned flexible packaging bag having no self-supporting property or formability is filled with a liquid packaged product as it is. A liquid-filled packaging structure as described above is proposed. That is, since the flexible packaging bag formed by protruding the above-described film-like check nozzle is made of a soft laminated film, it is not self-supporting even if it is filled with a package. In order to use this as it is, it is necessary to use it in combination with another self-supporting container, that is, the standing pouch 9.

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

  However, in forming the temporary sealing portion 12 described above, the “base end portion” of the film check nozzle corresponds to the fusion bonding position of the film check nozzle 1 to the packaging bag body 2. The position, or a position slightly deviated to the inside of the packaging bag body 2 from the corresponding position, or conversely, a position slightly deviated from the corresponding position to the outside of the packaging bag body. In any case, it is possible to leave the part to be packaged extraction passage formed outside the low-temperature fusion part, which is long enough for the film check nozzle to perform its original function. is necessary.

  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 able to be formed by polyethylene, it is preferable to form the high melting point sealant layer from medium density or high density polyethylene and to form the low melting point sealant layer from 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 “projection base” of the film-like check nozzle from the flexible packaging bag main body is located at the position corresponding to the side fusion bonding position of the packaging bag main body, or from the corresponding position to the protruding tip side of the nozzle. Although the position can be somewhat deviated, in this case as well, a package outlet passage having a length (about 5 to 8 mm) sufficient for the film-like check nozzle to perform its original function is formed. It is necessary for the portion to remain on the outside of the low temperature fusion portion, that is, the temporary sealing portion 12.
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 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, in the vicinity of the fusion-bonding position of the film-like check nozzle to the packaging bag main body 2, at the base end portion of the film-like check nozzle, For example, a temporary sealing portion 12 having a heat sealing strength that is less than half of the original heat sealing strength is provided, and the inflow of liquid packaging material packed and packaged in a packaging bag from the temporary sealing portion to the nozzle tip side is temporarily sealed. By blocking reliably with the stop part 12, even if the to-be-packaged object is what was heated to 50-100 degreeC, most of the to-be-packaged article extraction channel | paths of a film-like non-return nozzle, It can fully protect from the permanent deformation | transformation of the direction which expands the extraction channel | path.

  Accordingly, the function of the film check nozzle 1 can always be sufficiently exerted on the front end portion of the film check nozzle 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 opening of the stopper 12 is brought about, and the tip portion of the film-like check nozzle is broken or cut off to form a pouring opening. In such a state, the packaging bag is tilted so that the pouring opening faces downward. It is assumed to be out posture.

  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, it can be effectively prevented when the dispensing opening is fully open as necessary, and when the packaging bag is stopped from being dispensed based on the return to the standing position. Intrusion of outside air into the packaging bag main body can be reliably 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, it is possible to easily and easily realize the temporary sealing having the sealing strength as expected and the required fusion bonding to the film check nozzle.

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. It is necessary 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 researches of 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 fusion on the upper side portion of the flexible packaging bag body 2 (NY15 / PET12 / LLDPE40). In the case of temporary sealing, 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. Heat seal of the temporary sealing part when a low density polyethylene layer (high melting point sealant layer) is used and this laminated film is heated and pressurized at 300 kPa cylinder pressure for 3 seconds with a heat sealer with cylinder using the heat sheet temperature as a parameter. Strength (N / 15mm) was measured with a tensile tester (TENSILON RTG-1300) at a tensile speed of 200mm / min and film width. It was measured under the conditions of 5mm. The results are shown in Table 3.

  Next, in the present invention, in the packaging bag body made of a soft laminated film, for example, in the position of the upper part of the side, in the non-self-supporting flexible packaging bag formed by projecting the film-like check nozzle, In order to help the self-supporting of the non-self-supporting liquid-filled package 8 formed by sealing a liquid or viscous packaged material in the liquid, a cylindrical self-supporting outer packaging container as described below, for example, a standing pouch Proposed is a liquid-filled packaging structure in which a bag-like container such as 9 is provided and stored and held.

  In the present invention, the self-supporting outer packaging container 9 used to store the above-described non-self-supporting liquid-filled packaging body 8 is formed of a laminated film having a cylindrical bag shape at least in the lower part. Is preferably used, and in particular, a flat bottom 16 is provided at the lower end so that it can be self-supporting. The outer packaging container 9 has an overhanging sachet 9a projecting from the upper part of the side corresponding to the film check nozzle 1 and having the same shape as the film check nozzle. What was provided is suitable, for example, the 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. In addition, it is preferable that the liquid packaging body 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 the present invention, a combination of the above-described non-self-supporting flexible packaging bag and a standing pouch is suitable, and a liquid-filled packaging structure is obtained by this combination.

  In such a liquid-filled packaging structure of the present invention, 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 film having a form of a standing pouch or the like using a laminated film composed of a polyethylene terephthalate film layer or a nylon resin film layer and the sealant layer comprising a polyethylene layer or a polypropylene layer is preferably used. 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 cut portion 15, the above-mentioned non-self-supporting flexible packaging bag accommodated therein, that is, the protruding portion of the film-like check nozzle protruding from the liquid filling package 8 is exposed. In addition, the nozzle opening is opened for use.

  In the present invention, after the liquid-filled package 8 is stored in the standing pouch 9, depending on the case, the upper end lateral seal portion 8a may be placed on the upper side of the standing pouch 9, as shown in FIG. , Heat seal and fuse together partly (spot) or over the entire width, and store in a suspended state. In such a case, the liquid filling package 8 filled with the liquid can be held firmly in the standing pouch 9 and has an effect of assisting the 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.

  The technology of the present invention is not only provided with a film-like non-return nozzle but also a general liquid filling package, particularly a refill soft provided with a general liquid spout integrally formed in the packaging bag body. The present invention can also be applied to a packaging structure that contains packaging bags.

It is a front view which shows embodiment of the film-like non-return nozzle which concerns on this invention. It is a basic diagram which illustrates the uneven | corrugated processing area | region of the film-like check nozzle concerning this invention. It is an expanded sectional view of the opening planned position of a film-like check nozzle. It is a front view of 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 of other embodiment of a liquid filling packaging structure.

Explanation of symbols

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 package 9 Self-supporting type outer packaging container (standing pouch)
DESCRIPTION OF SYMBOLS 10 Water-repellent / oil-repellent coating layer 11 Gas storage space 12 Temporary sealing part 13 Outlet passage 14 Uneven structure 15 Cut-out part 16 Bottom part 17 Chuck

Claims (14)

  In the flexible packaging bag in which a film-like check nozzle is provided on the side portion of the packaging bag body made of a soft laminated film to project a check function when a liquid material is interposed between the overlapping plastic films. The bag body is characterized in that the unsealed portion of at least one of the front and back laminated films is constituted by a laminated film having a concavo-convex structure at least in the upper part or in the vicinity of the side edge on the film check nozzle side. A flexible packaging bag having a check function nozzle.   The concavo-convex structure formed on the laminated film is embossed, blasted, knurled, wrinkled, vertically and horizontally striped on one or both of the laminated films on the front and back surfaces, islands, stripes, The flexible packaging bag having a check function nozzle according to claim 1, wherein the flexible packaging bag is formed in a partial pattern or a full pattern. The film-like check nozzle is composed of two overlapping soft laminated films, the outer peripheral edge portion excluding the portion serving as the nozzle base end, and the central portion serving as a dispensing passage. The base end of this is fused and joined to the side of
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 a non-return function for preventing intrusion of outside air is generated by a mutual adhesion effect caused by staying of the package on the inner surface. Flexible packaging bag.   The film-like check nozzle has a concavo-convex structure on the nozzle base end side excluding the planned tearing position of at least one of the front and back laminated films and the vicinity thereof. A flexible packaging bag comprising the described check function nozzle.   The base end portion of the film-like check nozzle has a sealant layer facing to be fused at a low temperature by a low melting point plastic film, and an inner surface of the dispensing passage is temporarily sealed. A flexible packaging bag comprising the check function nozzle according to any one of the above.   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 one in any one of Claims 1-5 characterized by the above-mentioned. Flexible packaging bag with check function nozzle. When the liquid material is interposed between the overlapping plastic films on the side of the packaging bag body made of a soft laminated film, a film-like check nozzle that projects a check function is projected, and the packaging bag body is In the non-self-supporting flexible packaging bag, the non-sealed portion of at least one of the laminated films is constituted by 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. In addition, a non-self-supporting liquid filling package formed by filling a liquid or viscous packaged article in a liquid seal;
It is a cylindrical container for storing the non-self-supporting liquid-filled package, and in one side of the container, the film-like non-return nozzle is stored so as to be exposed, and a nozzle drawer for pulling it out A self-supporting outer packaging container provided with an overhanging sachet provided with a tear-inducing rivet for opening, and provided with a bottom plate so as to be self-supporting;
A liquid-filled packaging structure characterized by comprising:   The concavo-convex structure formed on the laminated film is embossed, blasted, knurled, wrinkled, vertically and horizontally striped on one or both of the laminated films on the front and back surfaces, islands, stripes, The liquid-filled packaging structure having a check function nozzle according to claim 7, wherein the liquid-filled packaging structure has a check function nozzle. The film-like check nozzle is composed of two overlapping soft laminated films, the outer peripheral edge portion excluding the portion serving as the nozzle base end, and the central portion serving as a dispensing passage. The base end of this is fused and joined to the side of
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 7 or 8, wherein a non-return function for preventing intrusion of outside air is generated by a mutual close contact action caused by staying of the package on the inner surface. Liquid filling packaging structure.   The film-like check nozzle has a concavo-convex structure on the nozzle base end side excluding a position where the front or back laminated film is to be cut and the vicinity thereof. A liquid-filled packaging structure comprising the described check function nozzle.   The base end portion of the film-like check nozzle has a sealant layer facing to be bonded at a low temperature by a low melting point plastic film, and an inner surface of the dispensing passage is temporarily sealed. A liquid-filled packaging structure comprising the check function nozzle according to any one of the above.   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 one in any one of Claims 7-11 characterized by the above-mentioned. A liquid-filled packaging structure provided with a check function nozzle.   The non-self-supporting liquid-filled packaging body is in a state in which the upper end lateral seal portion thereof is fused to the upper end portion in the self-supporting outer packaging container and suspended in the self-supporting outer packaging container. The liquid filling and packaging structure according to any one of claims 7 to 12, wherein the packaging structure is stored and held.   The self-supporting outer packaging container has a flat bottom at the lower end, and the top is a flexible packaging bag made of a soft laminated film that can be opened and closed to replace a non-self-supporting liquid-filled package. The liquid filling and packaging structure according to any one of claims 7 to 13.

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