JP2005015029A - Liquid discharging nozzle and packaging bag using the nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive liquid-discharging nozzle that eliminates the need for detachment of a cap from the discharging nozzle, can easily be produced, and easily and securely be welded and joined to the main body of the packaging bag, the liquid discharging nozzle having a non-return mechanism that automatically stops discharging of contents and closes its opening at the same time and securely prevents outside air from entering the packaging bag. <P>SOLUTION: The liquid discharging nozzle 1 has its base end welded and joined to the internal faces of the flexible packaging bag main body 2 at the side of the main body 2 via sealant layers as the outer most layer. A front and a rear side laminate films including a thermoplastic base film layer and a sealant layer in a peripheral area except the edges of the base ends are welded together such that the base film layers having a fusing point higher than the sealant layers face each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is fusion bonded to the side or top of a packaging bag body made of a laminated film, which is soft and flexible, simultaneously with the packaging bag device or with the filling of a liquid package. In particular, the liquid dispensing nozzle and the packaging bag using the liquid dispensing nozzle are particularly inexpensive and easy to handle and to handle. The present invention proposes a liquid dispensing nozzle having a so-called check function that can sufficiently prevent outside air from entering the packaging bag, and a packaging bag using the same.
[0002]
[Prior art]
For example, as liquid and jelly-like foods and beverages exceeding 100 ml, seasonings and other packaging bags, a cap made of a plastic injection molded product or the like is formed on the inner surface of a relatively hard packaging bag body containing aluminum foil. The prepared dispensing nozzle is heat-sealed, and according to this, the packaged item can be dispensed multiple times by removing and screwing the cap from the dispensing nozzle.
[0003]
[Problems to be solved by the invention]
However, in such a packaging bag, the cost of the pouring nozzle and cap, which are plastic molded products, is high, and the pouring nozzle having a three-dimensional shape is completely attached to the packaging bag body. In addition to the fact that heat fusion is still difficult using special heat-sealing means etc., there is a handling trouble that the cap must be removed and re-screwed each time the packaged item is poured out. In addition, along with the extraction of the package, etc., outside air can easily enter into the packaging bag that is relatively hard and difficult to be crushed and deformed, and after the completion of the extraction, until the cap is screwed into the extraction nozzle. During this time, it is inevitable that outside air will enter the packaging bag, and dust, fungi, etc. in the outside air will contaminate the package, and the outside air itself will oxidize the package and damage the flavor, etc. There was a problem that there was.
[0004]
An object of the present invention is to solve such problems of the prior art, and the object of the present invention is to take out outside air into the packaging bag when the packaged material is poured out. Without applying it to the body of the soft packaging bag corresponding to the pouring by contraction or crushing deformation, and automatically closing the opening at the same time as the pouring of the package is stopped, It has a non-return function that reliably prevents the outside air from entering, and does not require the cap to be removed from the dispensing nozzle. It is an object of the present invention to provide an inexpensive liquid dispensing nozzle that can always be reliably and easily performed, and a packaging bag using the same.
[0005]
[Means for Solving the Problems]
The liquid pouring nozzle according to the present invention is a side portion or top portion of a soft packaging bag body, and a base end portion is fused and joined to the inner surface of the packaging bag body by an outermost sealant layer. A laminated film on each side of the front and back, including a thermoplastic base film layer and a sealant layer, for example, two laminated films on the front and back, or a laminated film formed by folding the front and back at the center. The base film layers having a higher melting point than the layers are opposed to each other in the peripheral portion except the base end side.
[0006]
Such a dispensing nozzle comprises a base film layer, which can be, for example, a biaxially stretched film, on each of the front and back laminated films, preferably at the required sides of the laminated film, preferably also including an impulse fusing seal, By fusing with an impulse seal, it can be manufactured easily and quickly.
Here, when the fusion part is formed by impulse sealing, the base film layer can be rapidly heated and cooled under pressure to form the fusion part in a very short time. As described above, it is possible to advantageously prevent the deformation of the base film layer due to heat shrinkage or the like as compared with the sealing method that requires a relatively long time until the base film layer is fused.
[0007]
The pouring nozzle produced in this way is a sealant layer that is located on the outer surface of the nozzle, for example, an unstretched olefin resin layer such as various polyethylene, polypropylene, and metallocene catalyst polyolefins, ethylene vinyl acetate copolymer By fusing a coalesced layer, an ethylene ethyl acrylate copolymer layer, an ionomer layer, etc. to the same kind of sealant layer as the inner surface layer of a soft packaging bag body, for example, by heat sealing, This can be simply, quickly and always reliably fused and bonded to the packaging bag body, thereby producing a packaging bag having a pouring nozzle protruding outward from its side or top. Can do.
[0008]
Here, the filling and packaging of the seasoning, soup and other liquid packages for the packaging bag can be performed simultaneously with or after the joining process of the pouring nozzle to the packaging bag body. Filling and packaging can be performed in a state where the outside air is sufficiently removed from the inside of the packaging bag by, for example, filling in liquid or degassing after filling the packaged item. It is preferable for preventing the oxidation of substances and the like, and it is preferable for allowing the pouring nozzle to exhibit a check function as described later more reliably.
[0009]
By the way, the use, consumption, etc., of the packaged items in the bag, the removal of the fused part at the tip of the dispensing nozzle by cutting, breaking, etc., forms the tip opening in the nozzle, The packaging bag can be tilted so that the opening at the tip of the nozzle faces downward. In this case, the pouring nozzle made of a soft laminated film has the effect of the head pressure of the package. The front opening is opened apart from the front and back to allow the packaged items to be dispensed as required. When the packaged item is dispensed in this way, the flexible packaging bag body shrinks or collapses by the amount corresponding to the dispensed volume without sucking outside air as the packaged item is dispensed. Deform.
[0010]
After the required amount of items to be packaged is poured by tilting the packaging bag, the packaging bag is returned to its original standing position to stop the dispensing, and at the same time the dispensing is stopped, the film on the front and back of the dispensing nozzle This brings about mutual close contact in the entire vertical direction and sufficiently prevents the outside air from entering the packaging bag. Therefore, in the packaging bag having the dispensing nozzle, the packaged items in the bag are sufficiently protected from contact with the outside air during and after the dispensing as well as before the dispensing of the packaged items. Thus, oxidation, fouling and the like of the packaged items in the bag are effectively prevented.
[0011]
By the way, such close contact of the film on the front and back of the pouring nozzle here, in addition to returning the pouring nozzle to the original shape at the time of manufacture by releasing the pouring nozzle from the action of the hydraulic head pressure by the standing return of the packaging bag, When the article to be packaged in the dispensing nozzle returns to the inside of the packaging bag body, the front and back films are exposed to a reduced pressure atmosphere and are mutually adsorbed under negative pressure, etc. The close contact is assisted by causing the packaging bag body, which has been shrunk or crushed and deformed as the article to be packaged from the packaging bag is poured, to have a reduced pressure inside due to its inherent elastic restoring force. It will be.
[0012]
In this way, the tip opening of the packaging bag can be automatically sealed in close contact with the rising and returning of the packaging bag without any special operation on the dispensing nozzle, and the dispensing nozzle has an excellent check function. It can be demonstrated.
On the other hand, the re-pouring of the article to be packaged can be performed by tilting the packaging bag as described above, and the stopping thereof can also be performed in the same manner as described above. In this case as well, the dispensing nozzle exhibits an excellent check function against the ingress of outside air based on the automatic close sealing.
[0013]
Here, the laminated films on the front and back constituting the pouring nozzle have a thickness of 10 to 100 μm to ensure sufficient softness and pressure responsiveness, etc. while properly functioning as a nozzle. Is preferable. In other words, if it is less than 10 μm, the feeling of weakness of the nozzle cannot be denied, and it is difficult to properly pour the packaged contents in the bag into the intended position, while if it exceeds 100 μm, the film becomes too strong. Therefore, the smoothness of the adsorption sealing as described above may be impaired.
[0014]
In this case, the base film layer of the laminated film can be a uniaxially or biaxially stretched polyethylene terephthalate film layer, an ethylene vinyl alcohol copolymer film layer, a nylon resin film layer, a polypropylene film layer, or the like. Any of the layers may be provided with a required vapor deposition layer. Further, as described above, the sealant layer of the laminated film can be an unstretched olefin resin layer or the like.
[0015]
In such a pouring nozzle, preferably, a base end portion that is fusion-bonded to the packaging bag body and a fusion portion at the front end are positioned corresponding to each other on the opposing surface of each base film layer. Providing a groove extending substantially over the entire width of the laminated film.
Under the joining posture of the pouring nozzle to the packaging bag body, this groove extending in the vertical direction or the horizontal direction is a tear-inducing flaw when cutting off the fused portion of the nozzle tip when pouring out the package. As a result, it is possible to smoothly and easily remove the tearing tip of the dispensing nozzle with fingers, and the tearing marks are sufficiently smoothed, so that the packaging bag can be opened without using a blade, and It is possible to sufficiently exert the close sealing function on the pouring nozzle.
[0016]
By the way, such a groove is preferably a molten groove formed continuously or intermittently or linearly or curvedly by irradiation with a laser beam. The depth of such a melting groove can be adjusted as required by selecting the laser beam irradiation energy, the relative movement speed, etc., and the groove has a curved cross-sectional shape. Therefore, the risk of stress concentration on the groove wall surface can be sufficiently eliminated.
[0017]
In such a pouring nozzle, the relative distance between two fused portions, which are mostly linear, extending to the base end edge is between the base end and the groove forming position. It is preferable to decrease gradually toward this. According to this, it is possible to more easily perform the control of the flow rate and the direction of pouring of the article to be packaged from the tip opening of the pouring nozzle formed at the groove position.
[0018]
In this case, when at least one of the two fusion portions extending to the base edge is bent into a V shape at the groove formation position, the bent portion of the fusion portion is called a so-called bent portion. It can be made to function as a tear starting wrinkle similar to a V notch or the like.
[0019]
Further, the packaging bag according to the present invention is such that the base end portion of any one of the liquid pouring nozzles described above is fused to the inner surface of the packaging bag body at the fused portion between the sealant layers of the soft packaging bag body. It joins and the liquid pouring nozzle protrudes from the side part or top part of a packaging bag main part. Here, the film structure of the soft packaging bag body may have the same kind of base film layer and sealant layer as the pouring nozzle, and a suitable intermediate layer interposed therebetween. You can also
[0020]
In such a packaging bag, the sealant layer that forms the inner surface of the soft packaging bag body is preferably made of the same kind of resin material as the sealant layer on the outer surface of the liquid dispensing nozzle. According to this, the fusion splicing strength of the packaging bag main body of the liquid pouring nozzle can be sufficiently increased.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of a liquid dispensing nozzle according to the present invention.
In the figure, 1 denotes a liquid pouring nozzle, and this pouring nozzle 1 is, for example, a fusing part of a soft packaging bag body 2 shown by an imaginary line in the sealant layer on the inner surface thereof. The base end is fused and joined by an outermost sealant layer, preferably a sealant layer made of the same resin material as the sealant layer of the packaging bag body.
[0022]
Here, the dispensing nozzle 1 includes a thermoplastic base film layer, for example, a biaxially stretched polyethylene terephthalate layer having a thickness of 5 to 20 μm, and a sealant layer, for example, an unstretched polyethylene layer having a thickness of 5 to 80 μm. The laminated film on each side of the front and back, for example, two laminated films with the same contour shape, or one laminated film folded back on the front and back at the center, facing the base film layer with a higher melting point than the sealant layer In the posture, each side portion excluding the base end side is preferably fused to each other as shown by hatching in the drawing, preferably by an impulse tool.
[0023]
In the figure, reference numeral 3 denotes a V notch as a tear starting fist formed at the fusion part at the expected tearing position of the dispensing nozzle 1, and this V notch 3 defines the tip fusion part 4 of the dispensing nozzle 1. It functions to facilitate tearing removal of the nozzle tip including it. Here, the V-notch 3 can be replaced with a −notch or can be formed in the lower portion of the figure.
[0024]
The relative distance between the two upper and lower fused portions 5 and 6 extending linearly, for example, to the base end side of the pouring nozzle 1 is at least up to the transverse groove position described later, and to the front end side in the drawing. The width of the base end side of the nozzle 1 is 50 mm, the length from the base end side to the formation position of the V notch 3 is 40 mm, and the V notch 3 The width at the forming position can be 15 mm. In such a pouring nozzle, the base end portion having a width of about 10 mm on the base end side usually serves as a margin for fusion bonding to the packaging bag body 2.
[0025]
Further, preferably, an enlarged cross-sectional view along the line II-II of FIG. 1 is shown in FIG. 2 on the opposing surface of the base film layer at a position corresponding to the formation position of the V notch 3 of the dispensing nozzle 1 as described above. As is apparent from the above, respective transverse grooves 9, 10 extending over substantially the entire width of the respective laminated films 7, 8 are provided, and more preferably, the transverse grooves 9, 10 are melted by irradiation with a laser beam. As a groove, the risk of stress concentration on the groove wall surface is sufficiently removed.
When opening the packaging bag, it functions as a tearing guide rod for the dispensing nozzle 1 to facilitate the smooth and easy removal of the tip of the nozzle by fingers and to reliably guide the direction of tearing. The depths and widths of the transverse grooves 9 and 10 ensure the ease of tearing of the dispensing nozzle 1 and can prevent the nozzle 1 from being unexpectedly broken, and the base film layers 11 and 12 Needless to say, as long as the various barrier functions as expected can be exhibited, for example, when the thickness of the base film layers 11 and 12 is 12 μm and the thickness of the sealant layers 13 and 14 is 15 μm, the groove depth The thickness can be about 3 to 10 μm, and the groove width can be about 30 to 300 μm.
[0026]
The extending angle of the transverse grooves 9 and 10 with respect to the lower fused portion 6 of the nozzle 1 is in a range of 60 to 120 °, particularly an acute angle range, as shown in FIG. This is preferable for causing the nozzle 1 to sufficiently perform a required function while improving the so-called liquid drainage when stopping the pouring and preventing subsequent dripping. 3 (b) and 3 (c) are plan views showing a state in which the tip portion of the nozzle 1 is torn open at the position where the transverse grooves 9 and 10 are formed, and FIG. In FIG. 3 (c), the extended posture in the vicinity of the tip opening of the side fusion portion 6 is substantially horizontal, and FIG. 3 (c) is an inclined posture in which the extended posture in the vicinity of the tip opening is inclined downward toward the tip. It is.
[0027]
On the other hand, when the extending angle of the transverse grooves 9 and 10 is an obtuse angle range, when the packaging bag provided with the dispensing nozzle 1 is placed in a standing posture and the dispensing of the package is stopped, The dripping can be prevented by causing the article to be packaged that has reached the vicinity of the tip opening of the outlet nozzle 1 to return more actively to the packaging bag body side.
[0028]
By the way, in order to form V notches 3 or −notches in the upper and lower fused portions 5 and 6 at positions corresponding to the transverse grooves 9 and 10, the fused portions 5 and 6 must have a sufficient width. Although necessary, for example, when the fused portions 5 and 6 are formed by an impulse fusing seal, the width of the fused portions 5 and 6 cannot be made so wide as to form a notch.
Therefore, in such a case, at least one of the upper and lower fused portions 5 and 6 extending to the base edge is substantially V-shaped at a position corresponding to the formation position of the transverse grooves 9 and 10, as shown in FIG. In the same manner as the V-notch 3, the bent point is made to function as a tearing start wrinkle.
[0029]
The liquid pouring nozzle configured as described above is, for example, the same as the filling and packaging of the article to be packaged into the soft packaging bag body, or prior to the filling and packaging of the article to be packaged, as shown in FIG. At the side of the packaging bag body 2, the sealant layers are fused to each other, and the sealant layers 13 and 14 on the outer surface of the base end of the nozzle 1 are fused to the inner surface of the packaging bag 2, mostly by heat sealing. By joining, it becomes a part of the packaging bag 15 and protrudes laterally from the upper end portion of the packaging bag body 2 in the figure.
Here, the sealant layer that forms the inner surface of the soft packaging bag body 2 is preferably made of the same kind of resin material as the sealant layer on the outer surface of the nozzle. It can be composed of the same kind as that of 1, and can be selected from various materials having required physical properties. In addition, when a required physical property cannot be ensured only by the base film layer, an intermediate layer can be interposed between the sealant layer and the base film layer.
[0030]
Such a packaging bag 15 takes a full form as illustrated in FIG. 6 by filling and packaging the liquid article to be packed therein, preferably under deflation, but the flexible packaging bag itself. Is usually not self-supporting or fixed, so when transporting, storing, displaying, using, etc., the items to be packed are stored in a box, fixed or fixed at multiple locations, It is preferable to impart self-supporting property and formability to the packaging bag.
[0031]
On the other hand, when the required amount of the packaged material to be packed is poured out, from the bent portion of the lower fused portion 6 of the dispensing nozzle 1 shown in the figure, the tip portion of the nozzle 1 Is removed by tearing along, for example, the transverse grooves 9 and 10, and the packaging bag 15 is opened. Then, the packaging bag 15 is preferably tilted together with a box body that holds and holds the packaging bag 15. FIG. 7 is a diagram illustrating this tilting state. Under this tilting posture, the nozzle opening of the packaging bag 15 in the box body 16 is sufficiently placed on the front and back sides by the water head pressure of the packaged items in the bag. It will be opened and will be dispensed as needed. Note that such pouring is performed by increasing the tilt angle of the box body 16 in accordance with a decrease in the items to be packaged in the bag.
Here, the soft packaging bag 15 undergoes storage deformation or crushing deformation according to the volume of the dispensed amount when such an article to be packaged is dispensed. Thus, the outside air is sufficiently prevented from entering, and the in-bag package is effectively protected against the outside air.
[0032]
As a result, after the required amount of articles to be packaged has been poured out, the box body 16 is returned to the standing posture indicated by the phantom line in the drawing to stop the pouring, and at the same time, the tip opening of the nozzle 1 is automatically opened. Bring close contact.
Here, as described above, this close closing of the pouring nozzle 1 is performed when the pouring nozzle 1 is released from the hydraulic head pressure, and the laminated films 7 and 8 on the front and back sides are produced at the time of producing the pouring nozzle 1. By returning to the original shape, and when the article to be packaged in the pouring nozzle 1 flows down into the packaging bag body 2, the front and back films 7 and 8 are placed in a reduced-pressure atmosphere, so that they are soft over the entire width of the nozzle width. For example, the negative pressure is mutually adsorbed. Such close contact is more reliably maintained based on the fact that the packaging bag body 2 that has been crushed and deformed has a tendency to depressurize the packaging bag 15 based on the inherent elastic restoring force.
Therefore, here, based on the close closure of the nozzle 1 and the subsequent continuous maintenance of the close contact at the same time as the dispensing is stopped, the package contents in the bag are continuously protected from the outside air from the stop of the dispensing. You can also.
[0033]
In this way, by simply splicing and joining the inexpensive dispensing nozzle 1 with a simple structure to the packaging bag body 2 by heat sealing or the like, it is possible to easily and reliably realize both of them. Further, it is possible to sufficiently prevent the outside air from entering the packaging bag when the packaged object in the packaging bag 15 is poured out without any special operation on the dispensing nozzle 1. And the approach of this outside air is sufficiently prevented even when the packaging bag 15 is subsequently tilted and returned to the upright position for the re-pouring of the package.
[0034]
【The invention's effect】
As is apparent from the above description, according to the present invention, the liquid pouring nozzle composed of two laminated films can be manufactured at a very low cost, and the pouring nozzle can be applied to the packaging bag body. Can be easily and always reliably performed by general heat sealing or the like.
In addition, when the packaged items in the bag are poured out, the packaging bag itself can be tilted and raised without any special operation on the nozzle, except for the tear removal of the tip of the nozzle. Can be done easily.
And furthermore, by preventing the ingress of outside air into the packaging bag by crushing deformation of the packaging bag body accompanying the liquid dispensing and the excellent non-return function of the dispensing nozzle, The object to be packaged can be effectively protected from oxidation, fouling, flavor reduction and the like.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a liquid dispensing nozzle according to the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line II-II in FIG.
FIG. 3 is a plan view showing another example of forming a transverse groove and a lower fusion part.
FIG. 4 is a plan view showing an example of forming a V-shaped bent portion on upper and lower fused portions.
FIG. 5 is a plan view showing an embodiment of the packaging bag according to the present invention with a part thereof removed by breaking.
FIG. 6 is a perspective view illustrating a state in which an article to be packaged is packed and packaged in a packaging bag.
FIG. 7 is a view showing an example of dispensing an object to be packaged from a packaging bag stored in a box.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid pouring nozzle 2 Packaging bag main body 3 V notch 4 Tip fusion part 5, 6 Fusion part 7, 8 Laminated film 9, 10 Transverse groove 11, 12 Base film layer 13, 14 Sealant layer 15 Packaging bag 16 Box

Claims (9)

A liquid pouring nozzle whose base end is fused and joined to the inner surface of the packaging bag body by the outermost sealant layer at the side or top of the soft packaging bag body,
Laminate films on both sides, including a thermoplastic base film layer and a sealant layer, are fused to each other in the peripheral area except the base edge, with the base film layer having a higher melting point than the sealant layer facing each other. Liquid pouring nozzle. The liquid dispensing nozzle according to claim 1, wherein the thickness of the laminated film is in the range of 10 to 100 μm. The liquid pouring nozzle according to claim 1 or 2, wherein the mutual fusion part of the base film layer is an impulse seal fusion part. The liquid dispensing nozzle according to any one of claims 1 to 3, wherein grooves are provided on opposing surfaces of the respective base film layers so as to correspond to each other and extend over substantially the entire width of the laminated film. The liquid pouring nozzle according to claim 4, wherein the groove is a melting groove formed by irradiation with a laser beam. The liquid according to claim 4 or 5, wherein the relative distance between the two fused portions extending to the base end is gradually decreased from the base end portion to the groove forming position toward the groove forming position. Pouring nozzle. The liquid pouring nozzle according to claim 6, wherein at least one of the two fused portions extending to the base edge is bent and formed in a substantially V shape at a groove forming position. A liquid pouring nozzle in which the base end portion of the liquid pouring nozzle according to any one of claims 1 to 7 is fusion-bonded to the inner surface of the packaging bag body at a fusion portion of the soft packaging bag body. Is a packaging bag that protrudes from the side or top of the packaging bag body. The packaging bag according to claim 8, wherein the sealant layer forming the inner surface of the soft packaging bag body is made of the same resin material as that of the sealant layer on the outer surface of the liquid pouring nozzle.

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