JP4246760B2 - Liquid packaging bag - Google Patents

Description

  The present invention relates to a liquid packaging bag filled and packaged with a fluid substance such as liquid and jelly-like foods and drinks, seasonings and other various liquid or viscous foods and drinks, pharmaceuticals and cosmetics. In particular, the present invention proposes a liquid packaging bag that is easy to open the packaging bag, has a good unsealed state, and can sufficiently prevent the occurrence of liquid dripping and unforeseen leakage of the article to be packaged.

  Conventionally, a liquid packaging bag comprising a base film layer and a sealant layer and filling and packaging a liquid or viscous packaged object is, for example, a biaxially stretched ethylene-vinyl alcohol copolymer resin as shown in FIG. A laminated film of a base film layer made of a film and a sealant layer made of an unstretched ethylene-vinyl acetate copolymer resin is placed in the center in the width direction so that the sealant layers face each other by an automatic filling bag making machine. After being folded in half at the part position, it is formed by applying a three-way seal.

Then, the removal of the article to be packaged from the liquid packaging bag starts from the tearing of the packaging bag 20 from the I notch 22 provided in the vertical seal portion 21 of the liquid packaging bag 20, thereby the tear of the bag, at least, functions as a part of the storage space 23 of the objects to be packaged, in a state of being advanced to a position past the pouring path 24, and more preferably, the tear completely the packing bag 20 opening the packaging bag 20 in a state obtained by advancing position to traverse, then presses the packaged articles storage space 23, by widely opening the pouring path 24, is carried out by discharging the objects to be packaged.
In general, the I notch 22 is provided in the vertical seal portion 21, so that the dispensing passage 24 is also formed on the vertical seal portion 21 side.

However, in the conventional liquid packaging bag 20 itself because it is flexible, the package item packaging bag 20 by unintended deformation during pouring of the packed material there is a risk that spill out.
Moreover, the pouring path 24, lateral sealing portion 25 and the vertical seal portion 21 have been made compartment forms by front and back of the film portion forming the pouring path 24, restrained in a flat shape by their seal portions 21 and 25 Therefore , a force to flatly overlap the dispensing passage 24 due to the restraint between the horizontal seal portion 25 and the vertical seal portion 21 acts to tend to close the tear opening. because the that, in the conventional liquid packaging bag 20, in close contact with the film between the pouring path 24, while difficult to dispense the material to be packaged, when pressing the storage space 23, and flows out well packaged articles momentum As a result, there was a problem that the hands and clothes became dirty due to scattering.

Furthermore, the packaged articles from the pouring path 24, dispensing is to become isosamples beyond the longitudinally sealed portion 21, Note digital or be packaged, returning the liquid packaging bag 20 in an upright posture after pouring At this time, there is a problem in that the packaged material is transmitted through the vertical seal portion 21 and liquid dripping easily occurs.

In addition, since the distance between the I notch 22 formed in the vertical seal portion 21 and the dispensing passage 24 is short, it breaks during handling of the liquid packaging bag 20, and the packaged material leaks unexpectedly. there was also the de score.

Therefore, the present invention has an object to solve such problems of the prior art, and the object of the present invention is easy opening, good opening state, and packaging The purpose of this invention is to propose a liquid packaging bag that can prevent dripping and splashing during the dispensing of objects.

The present invention heat-seals the side edges in the vertical direction with the laminated film comprising at least the base film layer and the sealant layer folded back in the width direction so that the sealant layers face each other, a packaging bag formed by heat-sealing a lower end laterally of the transverse seal portion of the upper side, the longitudinal heat sealing is not performed, either one of the folded side edges, the package item storage space in conjunction with kicking setting the pouring path of the narrow communicating, toward the side end edge portion of the pouring path from the upper end side of the upper lateral seal portion, an arcuate or linear tear induced flaw, the lateral seal part only then formed, and the starting end of the tear inducing flaw, the clearance between the upper end of the upper transverse seal portion with a range of 0.3 to 1.0 mm, and the end of the tear-induced flaw, pouring side end edge of the passage Clearer with the club Scan the there is provided a liquid packaging bag formed by a range of 0.3 to 5.0 mm.

In the present invention, the side edge portion where the extraction passage is provided and which is not heat-sealed is the end portion in the folded width direction of the three-side seal bag, the central joint seal bag or the back-sealed seal bag. liquid spout pouring passage which opens by tearing along the tear induced flaw extending before Symbol arc is parallel or tearing spout pouring passage after curved upwardly to the lateral sealing portion upper edge of the packaging bag The dimension of the liquid spout is approximately 0.3 to 50 mm in the width direction, and the clearance between the end of the tear guide trough and the side edge of the spout passage is The clearance between the starting end of the tear guide rod and the upper end of the upper lateral seal portion is 0.3 to 1.0 mm, and the guide rod is separated from the start end side of the tear guide rod. Located on the upper side seal part Providing at least a pair of protrusions protruding to either the front or back, providing a pair of knurled seals at the upper end of the upper lateral seal part, separating the tear guide rod, the base between the film layer and the sealant layer, SiO ₂ deposited layer, vinylidene coating layer chloride, aluminum oxide coating layer, Al deposited layer or SiO ₂ or Al, to provide an intermediate layer made of the sputtering layer, such as Al ₂ O _3, Preferably, the base film layer is made of a resin film such as ethylene vinyl alcohol copolymer, polyolefin, polyester, polyamide, polyimide, or vinylidene chloride, and the sealant layer is made of a polyethylene layer or a polypropylene layer.

According to the liquid packaging bag of the present invention, the pouring passage for the package is provided on the base end side of the laminated film that is not heat-sealed. The laminated film is always opened in a straw shape (elliptical shape) due to the restoring force of the laminated film, and the amount of the packaged item to be poured can be controlled by pressing the storage space, and the dispensing passage is directed toward the dispensing port. Since the width is gradually narrowed, the packaged item is poured out in a certain direction along the dispensing passage, and the packaged item is not scattered at the time of dispensing. In addition, the liquid to be packaged is good, and there is no risk of dripping during pouring.
In addition, a tear guide rod of the liquid packaging bag is provided on the upper lateral seal of the packaging bag, and its start end is formed apart from the spout portion, and 0.3 to 0.3 to the start end of the tear guide bag and the upper end of the upper horizontal seal. The 1.0 mm clearance ensures that the package will not break and the packaged material will not accidentally leak during handling of the packaging bag.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic cross-sectional view showing an example of a laminated film constituting the liquid packaging bag according to the present invention. The laminated film 1 includes a base film layer 2 and a sealant layer 3, and an intermediate layer 4 may be provided between the base film layer 2 and the sealant layer 3 as necessary. The laminated film 1 is formed by laminating the base film layer 2, the sealant layer 3, and the intermediate layer 4 by, for example, extrusion lamination or dry lamination.

The base film layer 2 is preferably composed of a synthetic resin film such as a uniaxial or biaxially stretched ethylene vinyl alcohol copolymer, polyolefin, polyester, polyamide, polyimide, or vinylidene chloride. permeability and, can it to exhibit high gas barrier properties.

In particular, the biaxially stretched polyethylene terephthalate film layer uses “Emblet PC” (trademark Unitika Co., Ltd.), which is a straight-cut polyester film. It is preferable to use “Emblem NC” (trademark Unitika Co., Ltd.), which is a conductive nylon film, for the following reason.
That is, according to these, in addition to imparting higher water vapor impermeability, gas barrier properties, etc. compared to the case of using a uniaxially stretched base film layer, linear tear removal by fingers of the tear opening part Can be made smooth and easy, and the tear opening can be made sufficiently smooth without fluffing.

  Moreover, if a polyethylene layer or a polypropylene layer is used as the sealant layer 3, an excellent sealing strength can be exhibited at a relatively low heat sealing temperature.

In addition, the intermediate layer 4 is preferably laminated as appropriate in order to improve the properties required for the packaging bag, such as water vapor impermeability, gas barrier properties, stiffness, etc., SiO ₂ vapor deposition layer, vinylidene chloride coating layer, An aluminum oxide coating layer, an Al vapor deposition layer, or a sputtering layer such as SiO ₂ , Al, or Al ₂ O ₃ is suitable.

In the place shown in FIG. 3, after folding the laminated film 1 having the above structure in the width direction so that the sealant layers 3 face each other, each side portion excluding the base end side that is the folded side end portion is formed. The liquid packaging bag 5 is formed by three-way sealing. As one embodiment of the liquid packaging bag of the present invention formed as described above, a tear guide bag 10 formed in a curved shape only in the upper lateral seal portion 6 is shown in FIG.
The hatched portion in the figure indicates the heat seal portion of the packaging bag.
In addition, the liquid packaging bag of the present invention is a folded side that is not subjected to heat sealing, such as a three-sided sealing type packaging bag in FIG. It can be applied to packaging bags having

The upper lateral seal portion 6 has a triangular non-sealed portion at the lower side end on the packaging bag base end side 7 side, and this non-sealed portion serves as a liquid discharge passage 8 to store a packaged object storage space 12. Communicated with.
The liquid dispensing passage 8 is not limited to a triangular shape, and preferably has a shape that gradually becomes narrower toward the liquid dispensing port 11 formed by a method described later. This is because the pouring path 8 tapers toward the liquid pouring port 11 so that the extrusion direction of the packaged article becomes constant, the packaged article does not scatter and the occurrence of dripping is suppressed. It can be done .
Passage 8 out liquid this Note may proximal edge 7 side end is formed by using a bottle mouth shape heat seal blades consisting recessed in a triangular shape. By the way , as the shape of the heat seal, a solid seal, a three-wire seal, a fabric seal, or the like can be used, and in particular, a solid seal or a three-wire seal is preferably used from the viewpoint of sealing reliability and safety.

And in the liquid packaging bag 5 of the present invention, before or after the formation of the lower lateral seal portion 9, the tear guide rod 10 is formed toward the dispensing passage 8 with the upper end of the upper lateral seal portion 6 as the starting end, With the tear guide rod 10 as a boundary, the upper horizontal seal portion 6 is grasped with both fingers, and the liquid outlet 11 is formed by easily tearing and opening the tear guide rod 10 along the tear guide rod 10 with fingers. To do. Therefore, the vertical length , that is, the width of the upper lateral seal portion 6 is set to a dimension that can be gripped with fingers, preferably 20 mm or more.
The tear guide rod 10 may be provided in a straight line as shown in FIG. 7 in addition to the curved shape as shown in FIG.

  Thus, the present invention is characterized in that the spout 11 is provided on the base end side 7 side of the packaging bag 5, and no pressure is applied to the base end side 7 side of the packaging bag 5. However, the laminated film 1 is always opened in a straw shape (elliptical shape) due to the force to restore the state before folding, and the pouring passage 8 gradually becomes narrower toward the pouring port. Therefore, the packaged item can be smoothly poured out in a certain direction along the dispensing passage 8 by pressing the storage space 12, and therefore the packaged item is dispensed at the time of liquid dispensing as in the prior art. Will not scatter and soil your fingers and clothing.

  Furthermore, the liquid packaging bag 5 of the present invention does not leak out from the dispensing passage 8 even when the packaged bag 5 is tilted due to the action of the surface tension, and the amount to be dispensed is stored in the storage space 12. It can be adjusted by acupressure control.

  Further, since the packaged object is not poured out beyond the vertical seal portion as in the prior art, but is poured out directly from the spout tip 11a, the occurrence of liquid dripping due to the packaged material traveling through the vertical seal portion. There is no.

Furthermore, tear inducing flaw 10 of the packaging bag 5 is provided only on the upper lateral seal portion 6 of the packaging bag 5, while having a clearance 0.3~1.0mm between its start end and the upper transverse seal part 6 upper end, Note because it is formed by spaced from the output passage 8 during handling of the packaging bag 5, it is suck without it leaking accidentally packaged articles fractured.

It should be noted that a clearance of 0.3 to 1.0 mm is provided between the starting end 10a of the tear guide rod and the upper end of the upper side seal portion 6 so that the packaging bag 5 is handled during continuous handling such as moving, packing, and transportation. When the bags are separated one by one through the perforation or every several required bags, the guide rod 10 can be prevented from being unexpectedly broken and the packaged material can be prevented from leaking.
When the clearance is smaller than 0.3 mm, the above effect cannot be expected. On the other hand, when the clearance is larger than 1.0 mm, the packaging bag 5 cannot be cut off at the tearing guide start end 10a and cannot be opened with fingers. .

Further, even in the state of the continuous packaging bag as shown in FIG. 4, since the starting end of the tear guide rod 10 is located in the middle of the upper end of the upper side seal portion 6, the starting end of the tear guide rod 10 during automatic filling and packaging. 10a is caught by a roll etc., and the guide rod 10 is not broken.
Furthermore, it is harder to bend than a conventional guide rod formed in a straight line from the vertical seal portion, and it does not break during movement.

  The tear guide rod 10 is a single rod provided extending in the minus direction in the width direction of the laminated film, a plurality of rods perforated in the width direction, and spaced in the width direction. It can be formed in a suitable shape and number of scissors, such as a plurality of small scissors provided, or melt marks provided continuously or intermittently with a laser beam, etc. The depth, the length in the width direction of the laminated film, and other dimensions are selected according to the thickness of the laminated film, the constituent material of the laminated film, and the like.

In the present invention, it is preferable that the dimension in the width direction of the liquid spout 11 formed by tearing by the tear guide rod 10 is in the range of 0.3 to 50 mm, and this dimension is the type of the package and the viscosity. It decides suitably by etc.
The “substantially width direction” herein refers to a case in which the tear guide ridge formed on the packaging bag in the present invention is formed to be inclined upward. The reason why the spout 11 is limited to 0.3 to 50 mm is that if it is smaller than 0.3 mm, the amount of the pour is too small. This is because a force greater than the tension acts, and the packaged item leaks out from the spout 11 or the amount of pouring cannot be adjusted by controlling the finger pressure.

Furthermore, it is preferable that the clearance between the end 10b of the tear guide rod and the liquid discharge passage 8 is 0.3 to 5.0 mm. This means that when the clearance is smaller than 0.3 mm, the packaging bag 5 moves, packs and transports. If the guide rod 10 is unexpectedly broken by receiving its own drop impact or stacking load during handling, etc., there is a risk of the packaged material leaking out, while the clearance is larger than 5.0 mm In other words, the packaging bag 5 cannot be cut off at the tearing guide end 10b and cannot be opened with fingers.

In particular, when the tear guide rod 10 is curved as shown in FIG. 3, the spout 11 opened by tearing and opening the tear guide rod 10 is horizontal to the width direction of the liquid packaging bag 5. (FIG. 5 (a)), or curved upwardly toward the end (FIG. 5 (b)) as for provided, the spout 11, horizontal or upward with respect to the width direction of the liquid packaging bag 5 When formed in a curved shape, the liquid to be packed is well drawn, and particularly when it is curved upward (FIG. 5 (b)), the spout tip 11a becomes thin (sharp), so it is transferred to another container. The effect that it is hard to spill when changing, etc. can be expected.

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  Furthermore, in the present invention, as shown in FIG. 6, the protrusion 13 (FIG. 6 (a)) or the knurled seal portion 14 (FIG. 6 (b)) is placed at a position spaced apart from the tear induction fistula starting end 10a. It is preferable to provide them as follows. The protruding portion 13 or the knurled seal portion 14 grips the packaging bag 5 with the tear guide rod 10 as a boundary, grips the upper side seal portion 6 with both fingers, and utilizes the leverage of the tear guide rod 10 to the finger In addition to the effect of preventing the fingers from slipping when tearing and tearing, it is possible to detect the tearing guide starting edge 10a with a tactile sense, and even a visually impaired person can easily find the position. There is an effect that can be.

  Therefore, the protrusion 13 or the knurled seal portion 14 needs to be provided in pairs on both sides of the upper side seal portion 6 at a position where it is gripped with both fingers, i.e., near the tear guide start end 10a. A plurality of pairs of protrusions 13 may be formed on both sides of the tear guide rod 10, and the size of each knurled seal portion 14 is at least a size that can be gripped with fingers, for example, 10 mm (the length of the upper side seal portion). (Span direction) × 5 mm (upper lateral seal portion width direction) is sufficient.

The protrusion 13 can have various shapes such as a circle, a triangle, a quadrangle, and a polygon. The method of forming the protrusion 13 includes a pair of the above-described two pairs positioned on the surface of one heat seal blade of the horizontal heat seal roll for forming the upper horizontal seal portion 6 with an interval in the film width direction. The upper side seal portion 6 is formed on the packaging film that has passed between the two heat seal blades by providing a recess having a shape and each of the other heat seal blades corresponding to the recesses. By forming the protrusion 13 at the same time as the formation of.
Similarly, the knurled seal portion 14 can also be formed without adding a special process by forming a knurled rough surface on each surface of the pair of transverse heat seal blades.

  The liquid packaging bag according to the present invention packages soy sauce, sauces, various seasonings, soups, fruit juices, and other liquid or viscous foods, detergents, pharmaceuticals, and the like that may contain other granular materials. It can be used as a packaging bag used for the above.

It is a top view which shows the conventional liquid packaging bag. It is a schematic sectional drawing which shows an example of the laminated film which comprises the liquid packaging bag of this invention. It is a top view which shows one Embodiment of the liquid packaging bag of this invention. It is a top view which shows the formation method of the tear induction bag of the liquid packaging bag of this invention. It is a top view which shows the continuous packaging state of the liquid packaging bag of this invention. It is a top view which shows the Example at the time of forming (a) protrusion and (b) knurled seal part in the liquid packaging bag of this invention. It is a top view which shows other embodiment of the liquid packaging bag of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laminated film 2 Base film layer 3 Sealant layer 4 Middle layer 5, 20 Liquid packaging bag 6 Upper side seal 7 Base end side 8, 24 Liquid discharge passage 9 Lower side seal 10 Tear guide rod 10a Tear guide rod start end 10b Tear Guide rod end 11 Spout 11a Spout tip 12, 23 Storage space 13 Projection 14 Knurl seal 21 Vertical seal portion 22 I notch 25 Horizontal seal portion

Claims (3)

The laminated film comprising at least the base film layer and the sealant layer is heat-sealed in the vertical direction with the side edges folded in the width direction so that the sealant layers face each other, and the upper end and the lower end are A packaging bag heat sealed in the direction,
The upper horizontal seal portion is not provided with a vertical heat seal, and is provided with a narrow pouring passage that communicates with the space to be packaged on either one of the folded side edges. An arc-shaped or linear tear guide rod is formed only on the lateral seal portion from the upper end side of the discharge passage toward the side end side portion of the extraction passage, and the start end of the tear guide rod and the upper end of the upper lateral seal portion And the clearance between the end of the tear guide rod and the side edge of the extraction passage is in the range of 0.3 to 5.0 mm. And liquid packaging bag. The pouring path is provided, the side edges heat sealed has not undergone, claim 1, which is a three-way seal bag, folded widthwise side end of the central twofold sealed bags or back lined sealed bags Liquid packaging bag as described in. Pours after the liquid outlet of the outlet passage opened by tearing along the tearing guide ridge extending in an arc shape is curved parallel to or upward from the upper edge of the lateral seal portion of the packaging bag in the upper lateral seal portion liquid packaging bag according to claim 1 or 2, characterized in that it is formed so as to tear the spout passage.

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