JP2005145502A - Packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag which has no possibility of being carelessly opened during transportation and storing after contents are filled, and which can be easily opened when it is used. <P>SOLUTION: The packaging bag has a pouring opening equipped with a flow path 5 divided by a fused part at a corner part, and the flow path 5 faces obliquely upward, and a breakable opening guiding line 10 is provided on the fused part 8 of the top side dividing the flow path 5. In the packaging bag, the opening guiding line 10 is extended obliquely upward along the flow path 5, and its direction is changed at a bending part, and is extended in the direction crossing the flow path 5 of the pouring opening 4 toward the outside of the packaging bag approximately in parallel to the lower side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a packaging bag for storing a liquid.

  Recently, liquids such as detergents and shampoos are stored in bottles equipped with a pump, and taken out little by little through the pump. When a liquid such as a detergent in a bottle is used up, the bottle is not discarded but refilled with new contents in the bottle and reused. As a packaging bag for storing such a replenisher, a packaging bag having a spout at the upper corner as shown in FIG. 5 is used. In FIG. 5, the packaging bag 1 is provided with a spout 4 that protrudes obliquely upward at the corner, has a bottom 2, and is fused so as to define a flow path along the contour of the spout 4. It is a self-supporting packaging bag. An opening start portion (notch or the like) is provided in the fusion portion 3 on the side of the spout 4 at the scheduled cutting position. After filling the contents (replenisher) from the upper unfused portion 7, it is fused and sealed. At the time of use, the film is cut and opened from the opening start portion 6 of the spout 4 and the bottle or the like is filled with the replenisher. In the packaging bag having such a shape, two laminated films having at least one surface as a fusion layer are opposed to each other so that inner surfaces are between the fusion layers, in the same manner as in the manufacturing method of a normal self-supporting packaging bag. Fold the laminated film having the fusion layer at the bottom so that the outside becomes the fusion layer, and fuse the peripheral edges of the front and back films, leaving the top side, and punch out the spout part by punching along its contour Manufacture.

After filling the packaging bag with the contents, the upper side is fused, and when used, the opening film is torn and opened to pour the contents. The film of this part had a drawback that it was difficult to open because the area held by the hand was small. Therefore, in order to improve this defect, for example, a refillable packaging bag is proposed in which a planned cutting line is provided along the outline of the spout as shown in Patent Document 1 and the fused portion remains. ing. Since this refill packaging bag is provided only with the planned cutting line and the outer fused part remains, in use, the outer fused part of the planned cutting line is gripped and It was possible to open the film by tearing and removing the film at the outlet, and the above problems could be solved.
The opening point (notch, etc.) of such a packaging bag, particularly a self-supporting packaging bag, is usually provided at the fused portion on the side, but the packed packaging bag is adjacent to the packaging bag during transportation and storage. May get caught and be opened carelessly.
JP-A-11-59703

  By the way, in this refill packaging bag, when the spout opening is opened, a part of the film around the pipe is to be removed so that it is cut in a direction substantially perpendicular to the center line of the spout. . The opening part is exposed to the pipe and is easy to insert into the mouth of the bottle. However, as a result of various investigations on easy-to-pour packaging bags, the present invention has been completed, and the object of the present invention is to insert it into the mouth of the bottle. An object is to provide a packaging bag that is easy to open and easy to grip a film, and that the packaging bag after filling is not unintentionally opened during transportation or storage.

  The gist of the present invention is to have a spout provided with a flow path defined by a fusion part at a corner, and the flow path is directed obliquely upward, and a fusion part on an upper side that defines the flow path. A packaging bag provided with a breakable opening guide line, wherein the opening guide line extends obliquely upward along the flow path, changes direction at a bent portion, and the flow path of the spout is substantially the lower side. It is a packaging bag characterized by extending in a direction transverse to the outside of the packaging bag in parallel. In the present specification, “obliquely upward” means a direction that obliquely intersects the lower side of the packaging bag and faces upward.

  In the present invention, when the bag is formed, the fused portion on the upper side of the spout portion is left without being cut out, and an opening guide line is formed there by a perforation or a laser beam. The opening guide line starts from a notch provided on the upper side or a notch rich in design, starts cutting from here, cuts obliquely upward along the flow path, and changes the direction at the bent portion to change the flow path. Can be opened in a horizontal direction toward the outside of the packaging bag, so that the fusion part on the upper side is easily grasped by hand, and the flow path opens in the horizontal direction. Therefore, the film on the side of the spout remains open at an acute angle and is easy to insert into the mouth of the bottle. And since an opening area becomes large by opening diagonally, a highly viscous thing can also be poured out easily. In addition, since the starting point of the opening guide line is provided on the upper side, for example, in a self-supporting packaging bag, when a large number of packaging bags filled with contents are packed together on cardboard, etc. It will not be opened in preparation.

The present invention will be described in detail.
As a film used for the packaging bag according to the present invention, those conventionally used, for example, various films such as a biaxially stretched polypropylene film, a biaxially stretched polyamide film, and a biaxially stretched polyester film are used as a base material. A laminate in which a polyolefin resin such as a low-density polyethylene film, a linear low-density polyethylene film, an ethylene-vinyl acetate copolymer, or polypropylene is laminated as a sealant layer on a base film is used. In this case, a plurality of the above-mentioned various films as the base material may be laminated in order to increase the strength of the packaging bag, and further, aluminum foil, various inorganic vapor deposition layers, ethylene- A vinyl alcohol copolymer film or the like may be laminated. Further, in the present invention, since the film of the fused portion that is guided by the opening guide line and divides the flow path is torn in the horizontal direction, it is preferable that the film is easily tearable in the oblique direction and the horizontal direction. Is expressed by providing a half-cut using a laser or providing intermittent penetrating scars such as perforations. The horizontal tearability may be half-cut, but an easy tear film, for example, a uniaxially stretched film such as polyolefin or nylon, or a resin film mixed with 6 nylon and aromatic nylon such as MXD6 is stretched. Use of the easily tearable nylon film obtained is preferable because it can easily tear easily at any position and does not cause a problem of displacement from the end point of the opening guide line.

  And it is preferable to give the flow path the bulging of the film of a packaging bag by vacuum forming, pressure forming, etc., and if necessary, a shape-retaining material such as a pipe may be enclosed therein. The opening guide line is extended obliquely upward along the flow path at the fusion part on the upper side of the packaging bag, and is shaped so as to be substantially parallel to the lower side at the part that changes direction at the bent part and crosses the flow path. ing. That is, the portion along the flow path of the opening guide line and the horizontal portion are connected with a bent portion. The starting point of the unsealing guide line is preferably a notch or V-shaped notch having a good design provided on the upper side, and more preferably the corners of the upper end are rounded and chamfered. By being configured in this way, it is more effectively prevented that the filled packaging bag is inadvertently opened when it comes into contact with another article. The opening guide line is preferably formed by a half-cut line by a laser beam, or formed as an intermittent flaw scar such as a perforation. In the case of using a penetrating flaw, it is preferable to provide a penetrating flaw while leaving at least one uncut portion in the fusion part on the upper side that defines the flow path. Such an uncut portion is preferably provided between the starting point of the opening assisting line and the penetrating scar that continues therewith. If the notch used as the starting point of the opening assistance line and the penetration scar are formed at the same time, the positional relationship between them will not be shifted. As such a forming method, there is a Thomson punching method. Although the width of the uncut portion depends on the material of the film, it is about 0.5 mm to 1.5 mm, and a plurality of uncut portions can be provided at a necessary location.

An embodiment of the present invention will be described more specifically with reference to the drawings. FIG. 1 is a front view of a packaging bag according to the present invention, and FIG. 2 shows a state in which an uncut portion of an opening guide line of the packaging bag of FIG. 1 is cut and a film forming a flow path is torn and opened. It is a front view. FIG. 3 is an enlarged explanatory view in the vicinity of the spout. In FIG. 1, a packaging bag 1 is composed of two laminates of easily tearable nylon film / linear low density polyethylene obtained by stretching a biaxially stretched polyethylene terephthalate film / 6 nylon and MXD6 nylon mixed resin film. The fusion layers of the easy tear film are opposed to each other, and the bottom is folded between the two films by folding the fusion layer of the biaxially stretched nylon / linear low density polyethylene laminated film so as to be the outer surface. The side edge and the upper edge are fused so as to define the flow path 5 at one upper corner of the packaging bag to form the side fused portion 3 and the upper fused portion 8. A cutout is provided in the side fusion part 3. At this time, a part of the upper edge leaves an unfused portion 7 for filling the contents. In this way, as shown in FIG. 3, a wide fusion part 8 that defines the flow path 5 is formed on the upper side part. A V-shaped notch 6 with rounded corners is provided in the fusion part 8 on the upper side, and a notch is provided along the flow path 5 in the fusion part 3 on the side. In FIG. 3, it extends substantially perpendicularly from the notch 6 and makes a U-turn to change the direction along the flow path 5, and further change the direction at the bent portion 9, so that the outlet flow path 5 is parallel to the lower side. Is provided with an opening guide wire 10 that extends in a direction transverse to the outside of the packaging bag (horizontal direction). The opening guide line is formed by a penetrating scar, and an uncut portion 11 is provided between the opening guide line 10 and the notch. The cutout, the notch 6 and the opening guide wire 10 of the fusion part 3 on the side can be provided in one operation by using the Thomson punching method. Then, the point where the opening guide line 10 changes its direction at the bent portion 9 and goes in the horizontal direction is set as the end point 12 of the opening guide line, and thereafter, the opening guide line 10 can be cut in the horizontal direction due to the characteristics of the easy tear film. Even when an easy tear film is not used or when an easy tear film is used, a half-cut line may be provided using a laser.
And after filling the packaging bag 1 with the contents, the upper unfused portion 7 is fused and sealed.
When using the packaging bag after filling the contents, it is opened from the notch 6 by grasping and tearing the fusion part 8 on the upper side, and is guided by the opening guide line 10 to reach the end point 12. Can be cut horizontally along the tearing properties (see FIG. 2). In this way, by removing the fused portion on the upper side, a narrow spout that protrudes obliquely upward is formed at the corner of the packaging bag. And since the flow path of the spout is opened in parallel to the lower side, and the cut-out is provided in the fusion part 3 on the side that divides the flow path, the tip of the film on the side side becomes tapered and becomes the mouth of the bottle. It becomes easy to insert. Furthermore, even if it is not inserted into the mouth of the bottle, the cross-sectional area of the opening becomes large, and the dispensing becomes easy.
FIG. 4 shows a packaging bag of another shape according to the present invention, in which the upper unfused portion 7 is inclined, and the function and effect are the same as in FIG.

The front view of the packaging bag which concerns on this invention. The front view which showed the state which opened the packaging bag of FIG. The enlarged plan view of the spout vicinity. The front view of the packaging bag which carried out the other shape which concerns on this invention. The front view of the conventional packaging bag.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Bottom part 3 Side fused part 4 Outlet 5 Flow path 6 Opening guide wire start point (opening start part) 7 Upper unfused part 8 Upper side fused part 9 Bending part 10 Unsealing guide line 11 Not yet Cutting part 12 End point of opening guide line

Claims (6)

An opening guide wire having a spout provided with a flow path defined by a fusion part at a corner, and the flow path is obliquely upward, and can be broken at a fusion part on an upper side that defines the flow path. The opening guide line extends obliquely upward along the flow path, changes direction at a bent portion, and the flow path of the spout is substantially parallel to the lower side of the packaging bag. A packaging bag characterized by extending in a direction transverse to the outside. The packaging bag according to claim 1, wherein a starting point of the opening guide line is a notch cut out at an acute angle. The packaging bag according to claim 1 or 2, wherein the opening guide wire is formed by penetrating wound marks. The packaging bag according to any one of claims 1 to 3, wherein the film constituting the packaging bag is easily tearable in the horizontal direction. The packaging bag according to claim 4, wherein the film is a laminate including easily tearable nylon. The packaging bag according to any one of claims 1 to 5, wherein a fusion part on a side that divides the flow path is cut out.

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