JPH1129174A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag from which the contents of the bag can be easily squeezed out using one hand and which can be manufactured at low costs. SOLUTION: Films each having on one side a heat-sealable resin layer are superposed one over another so that the heat-sealable resin layers are opposed to one another, and the top edges, bottom edges, and side edges on one side are heat-sealed to form a top-end bonded part 2, bottom-end bonded part 3, and side-edge bonded part 4. And at a side edge part opposite to the part 4, a gusset part 5, which is folded toward the side of the part 4, is formed, and a protruding part 7, in which an unbonded part 6 protrudes upward, is formed at the part 2. An unsealing notch 8 may be provided at a bonded portion of the side edge of the part 7. A liquid sealed therein penetrates into the part 5, and hence by gripping the part 5, the liquid can be easily squeezed out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for storing a liquid, and more particularly to a packaging bag suitable for storing a highly viscous liquid.

[0002]

2. Description of the Related Art Conventionally, three-side seal bags, four-side seal bags, and the like are typical examples of packaging bags for storing various liquids including beverages. Recently, many of these bags contain jelly-like beverages.

[0003]

The bag containing the jelly-like beverage as described above can be squeezed out from the outlet and directly drunk or transferred to another container. In a sealed bag, the squeezing force when squeezing the content liquid is dispersed in all directions, so it is difficult to squeeze with one hand, and it is necessary to squeeze with both hands. It is also conceivable to use a tube container or a molded container, but these containers have a problem that the cost does not match the contents.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a packaging bag which can easily squeeze out a liquid content with one hand and can be manufactured at low cost. Is to do.

[0005]

In order to achieve the above object, a packaging bag according to the present invention comprises a film having a heat-sealable resin layer on one side thereof superposed on a heat-sealable resin layer, and An edge, a lower edge, and one side edge are heat-sealed to form an upper end adhesive portion, a lower end adhesive portion, and a one side edge adhesive portion, and are folded toward the one edge side at a side edge portion facing the one side edge adhesive portion. In addition to forming the gusset portion, a non-adhered portion is formed on one of the upper end adhesive portion, the lower end adhesive portion and the one side edge adhesive portion. When the upper end adhesive portion is selected, a non-adhesive portion forms a protrusion protruding upward. In any case, it is preferable to provide a notch for opening in the bonding portion on the side edge of the protrusion in order to open the protrusion by hand across the protrusion.

[0006]

FIG. 1 is a front view showing an example of a packaging bag according to the present invention, and FIG. 2 is an explanatory view showing each film constituting the packaging bag of FIG. 1 in a separated state.

[0007] The packaging bag 1 shown in FIG.
An intermediate film 30 that is folded in two between two outer films 10 and 20 is sandwiched with its folded portion 31 inside, and the upper end adhesive portion 2, lower end adhesive portion 3, and one side edge adhesive portion 4 are joined together. A gusset portion 5 is folded at the side edge portion facing the one side edge bonding portion 4 toward the one side edge portion, and an unbonded portion 6 protrudes upward from the upper end bonding portion 2. It has a projection 7. In addition, an opening notch 8 is provided in the bonding portion on the side edge of the protruding portion 7.

The outer films 10 and 20 have a heat-sealing resin layer on the inner surface, and the intermediate film 30 has a heat-sealing resin layer on the bent outer surface. As these films, for example, polyester, cellophane, stretched polypropylene, stretched nylon, stretched vinylon and the like on one side of a plastic film such as polyethylene, a heat-adhesive resin such as polypropylene or an acrylic adhesive,
An adhesive layer such as a rubber-based adhesive provided at a necessary portion or over the entire surface can be used.

In order to manufacture the packaging bag 1 shown in FIG. 1, first, the upper edge of the intermediate film 30 is sandwiched and bonded to the bonding regions 11 and 21 at the upper edge of the outer films 10 and 20, respectively. Intermediate film 30 in areas 12 and 22
The lower end edge of the intermediate film 30 is pinched and adhered, and the intermediate film 30 is formed into a symmetrical arc-shaped portion 32,
Is left in the form of being bonded to the inner surfaces of the outer films 10 and 20 at the other bonding regions 33 and 33.

To bond the films in such a form, the outer films 10 and 20 are attached to the intermediate film 3 with a plate or the like inserted between the folded intermediate films 30.
0, heat-sealing and bonding at the bonding areas 33, 33, and then removing the plate material and the like.
The adhesive regions 11 and 21 at the upper edges of the substrates 0 and 20 and the adhesive regions 12 and 22 at the lower edges are heat-sealed.
The upper and lower ends are sandwiched and bonded between the outer films 10 and 20. In this case, the inner surfaces of the outer films 10 and 20 facing each other through the cutout portions 34 of the intermediate film 30 are heat-sealed. Here, the outer film 10,
The upper edge of 20 has adhesive regions 11 and 21 and cut regions 13 and
Heat sealing is performed in the area where 23 is combined, and the cut areas 13 and 23 are cut after bonding. An opening notch 8 may be formed simultaneously with this cutting.

After the gusset portion 5 is formed by the intermediate film 30 as described above, and the upper end adhesive portion 2 and the lower end adhesive portion 3 are formed, the content liquid is filled from one side edge facing the gusset portion 5. Here, a liquid having a high viscosity is filled. Then, after the filling, the adhesive regions 14 and 24 on one side edge are heat-sealed to form the one side edge adhesive portion 4 to complete the bag making. In this case, the upper and lower edges extending the bonding regions 14 and 24 are simultaneously thermocompression-bonded.

The packaging bag 1 filled with the content liquid as described above is
When the liquid enters the gusset part 5, the thickness of the gusset part 5 becomes about twice as large as other storage parts. Therefore, after the protruding portion 7 is broken and opened by the opening notch 8, the squeezing portion 5 is pressed to efficiently press the squeezing solution, so that the squeezing solution can be easily squeezed out with one hand.

In the above example, the case where the packaging bag is manufactured from a total of three films, that is, two outer films and one intermediate film, has been described. It is also possible to manufacture by folding the part and heat sealing.

FIGS. 3 and 4 are front views each showing another example of the packaging bag according to the present invention. In these figures, FIG.
The same reference numerals are given to the same parts as those described above, and the description is omitted.
The packaging bag 1 shown in FIG. 3 has a protruding portion 7 in which an unbonded portion 6 protrudes upward from the middle of the upper end adhesive portion 3. The packaging bag 1 shown in FIG. A protruding portion 7 from which an unbonded portion 6 protrudes is formed on the upper end side of the portion 4, and a notch 8 for opening is provided at a bonding portion on a side edge of the protruding portion 7. The formation of the protruding portion 7 in which the non-bonded portion 6 protrudes from the lower end bonding portion 3 is the same as the case of forming the protruding portion 7 on the upper end bonding portion 2, and thus the description is omitted.

[0015]

As described above, in the packaging bag of the present invention, the content liquid enters the folded gusset portion, so that the force of squeezing out the content liquid by grasping the portion with the hand and pressing it is reduced. Since it works efficiently, the liquid content can be easily squeezed out with one hand. In addition, since it is only necessary to form a bag for a film, there is an advantage that the production cost is lower than that of a tube or a molded container.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a packaging bag according to the present invention.

FIG. 2 is a perspective view showing each film constituting the packaging bag of FIG. 1 in a separated state.

FIG. 3 is a front view showing another example of the packaging bag according to the present invention.

FIG. 4 is a front view showing another example of the packaging bag according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Upper adhesion part 3 Lower adhesion part 4 One side adhesion part 5 Gazette part 6 Unadhesion part 7 Projection part 8 Opening notch 10,20 Outer film 11,21 Adhesion area 12,22 Adhesion area 13,23 Cut Regions 14, 24 Adhesion region 30 Intermediate film 31 Bent portion 32 Arc-shaped portion 33 Adhesion region 34 Notch portion

Claims (3)

[Claims] 1. A film having a heat-sealable resin layer on one side is overlaid so that the heat-sealable resin layer faces each other, and an upper end edge, a lower end edge and one side edge are heat-sealed to form an upper end adhesive portion and a lower end adhesive portion. A gusset portion folded toward one side edge at a side edge portion facing the one side edge adhesive portion, and the upper end adhesive portion, the lower end adhesive portion or the one side edge adhesive portion. A packaging bag, characterized in that a non-adhered portion is formed on one of the side edge bonded portions with a protruding portion protruding outward. 2. The packaging bag according to claim 1, wherein an unadhered portion is formed on the upper end adhesive portion so as to protrude upward. 3. The packaging bag according to claim 1, wherein a notch for opening is provided in an adhesive portion on a side edge of the projecting portion.