JP2016104634A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag designed to form an outlet by laterally tearing it from a side sealing part, the packaging bag being able to prevent tearing in an unintended direction and able to make it easy to cut off a grip piece.SOLUTION: A packaging bag is formed by heat-sealing a film, has at least a front surface and a back surface, and is designed such that an accommodation space for accommodating contents is defined by being surrounded with the film. The packaging bag comprises: at least right and left side sealing parts 4 and 3; and a partition wall sealing part 8 defining an outlet 7 by use of the one side sealing part 3 and provided so as not to reach the lower end of the accommodation space. The partition wall sealing part 8 is provided with a through-hole 9. The through-hole 9 is composed of an upper portion 9a and a lower portion 9b. The upper portion 9a has an upward tapering shape. The outer edge of the lower portion 9b has an arcuate shape.SELECTED DRAWING: Figure 1

Description

  The present invention belongs to the technical field of packaging bags (pouches) used to store fluid substances such as liquids and pastes, and more specifically, a packaging bag of a type that is torn and opened from a side seal portion. It is about.

  Conventionally, as this type of packaging bag, a laminated film having tearability in the lateral direction is generally used, and an opening notch is formed near the upper end of the side seal portion. In such a packaging bag, since the upper part of the bag body is torn laterally from the notch portion and opened, the opening becomes large. Therefore, a packaging bag is known in which an opening (an outlet) having an appropriate size according to the contents is easily formed by tearing the bag (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 62-80824

  In the packaging bag described in Patent Document 1, a sealed accommodation space is formed by a peripheral seal portion, and a non-sealed portion extending from the accommodation space is provided in the seal portion, and the side seal portion A tear cut is provided so as to cross the non-seal portion from the peripheral end, and a tear stop break is provided on the opposite side of the non-seal portion from the tear cut. . For this reason, the opening of the bag is torn along the tearing cut to obtain an opening in the non-sealed portion, and an opening of an appropriate size according to the contents is obtained by pre-selecting the width of the non-sealing portion. Moreover, the tearing stops at the tear stop break or ends at the seal perimeter according to the tear stop break, and the user can immediately recognize the formation of the opening and make an extra tear. You do n’t have to.

  Thus, in said packaging bag, the opening as an outlet can be formed in a non-seal part by tearing in the horizontal direction from one side seal part. Further, the tearing cuts are said to include notches, perforations, thin-walled portions as well as holes of circles, ellipses, polygons, etc. extending substantially parallel to the protruding direction of the non-seal portion. Although it is possible to stop the tear at the break, depending on the force applied, the subsequent tear may propagate laterally or downward, and it is uncertain whether the tearing direction is upward, There is a problem that anxiety remains in the tearing operation.

  The present invention has been made in view of the above-described problems, and an object of the present invention is a packaging bag that tears laterally from a side seal portion to open an outlet, which is an unintended direction. An object of the present invention is to provide a packaging bag that can prevent tearing and can easily cut a knob.

  In order to achieve the above object, the packaging bag of the present invention is formed by heat-sealing a film, has at least a front side surface and a back side surface, and a storage space for containing contents is surrounded by the film. And a partition seal portion provided so as to define an outlet by at least the left and right side seal portions and the one side seal portion so as not to reach the lower end of the housing space. The partition seal portion is provided with a through hole, and the through hole is composed of an upper portion and a lower portion, and the upper portion has a shape that is tapered toward the upper side. And the outer edge of the lower portion has an arc shape.

Packaging bag of the present invention, when opened, in a state pinched upper and lower portions of the opportunity of opening, tearing laterally toward the septum seal portion from one side seal portion, the tearing operation As a result, the outlet is opened, but the outer edge of the lower portion of the through hole of the partition wall seal portion has an arc shape, so that it is possible to suppress tearing from propagating laterally and downward. Since the upper portion of the through hole is tapered toward the upper side, tearing can be easily guided upward, and the knob can be easily cut off.

It is a front view which shows the packaging bag as one Example of this invention. It is an enlarged view of the partition seal part periphery of FIG. It is explanatory drawing shown in the state which opened the packaging bag.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. Note that, in the drawings attached to the present specification, for convenience of illustration and understanding, the scale and vertical / horizontal dimension ratios are appropriately changed and exaggerated from those of the actual ones. Moreover, the packaging bag in this invention refers not only to the packaging bag in the state in which the content is not accommodated but the packaging bag in the state in which the content was accommodated.

  As shown in FIG. 1, the packaging bag P in a state where the contents are not filled has a rectangular shape when viewed from the front. That is, the packaging bag P is obtained by superposing two folded bottom film 2 made of film between two front and back body film 1 made of film and heat-sealing a predetermined position. The left and right side seal portions 3 and 4 and the bottom seal portion 5 are formed. In FIG. 1, the part which becomes an upper seal part after being filled with the contents is indicated by reference numeral 6, and a standing pouch is formed by forming the upper seal part 6 after filling the contents. In addition, each corner of the packaging bag P is chamfered.

  In this packaging bag P, as shown in FIG. 1 and FIG. 2, the upper seal portion 6 is not provided over the entire upper side, and the partition wall seal portion 8 that defines the outlet 7 with the left side seal portion 3. Is provided. That is, the partition wall seal portion 8 is formed so as to be connected to the upper edge of the left side seal portion 3 and the left edge of the upper seal portion 6. More specifically, the outer seal line L1 of the partition wall seal portion 8 is formed so as to reach the upper and left edges of the packaging bag P, and the inner seal line L2 of the partition wall seal portion 8 has a convex shape downward. It is formed as follows. Further, the inner seal line L2 of the partition wall seal portion 8 is composed of a first portion L21 and a second portion L22. The first portion L <b> 21 extends in a straight line from the left edge of the packaging bag P in the lateral direction, and is formed at a position below the inner seal line of the upper seal portion 6. The second portion L22 extends so as to straddle the right edge of the first portion L21 and the left edge of the upper seal portion 6, has a convex shape toward the bottom, and does not reach the lower end of the accommodation space. Is formed. Further, the tip portion of the second portion L22 is formed to have a convex arc shape downward. Thereby, as shown in the figure, the accommodation space is divided into three spaces of a main space Sa, an upper space Sb, and an extraction passage Sc by a virtual transverse line α passing through the lower end of the partition wall seal portion 8. Space is connected.

  The partition wall seal portion 8 is provided with a through hole 9. The through hole 9 includes an upper part 9a and a lower part 9b. The upper portion 9a has a tapered shape toward the upper side, and can be, for example, a triangular shape. The lower portion 9b has an arc shape at the outer edge. Preferably, the outer edge of the lower portion 9b is formed so that the radius r is 5 to 15 mm. In the packaging bag P of the embodiment, as shown in FIGS. 1 and 2, the through hole 9 has a so-called bowl shape.

  Further, as shown in FIG. 2, the outlet 7 includes a planned opening portion 10 that extends from the left side seal portion 3 toward the partition seal portion 8. An extension line in the direction in which the planned opening portion 10 extends is formed so as to be included in the lower portion 9 b of the through hole 9. The planned opening portion 10 may be provided with easy opening means for easily opening the outlet 7. For example, the easy opening means may include an easy opening line such as a half-cut line formed by laser processing or a cutter. In this case, a plurality of easy-open lines extending substantially parallel to each other may be provided. Further, a stretched film may be included in the film constituting the body film 1 so that the stretched direction of the stretched film and the direction in which the planned opening portion 10 extends coincide with each other. A notch 11 may be formed at the end of the planned opening portion 31, that is, at the left end of the left side seal portion 3. Although not shown, a scar group may be formed instead of the notch 11, and the scar group may be provided so as to penetrate the film, or provided so as to penetrate only the surface layer, for example, the base layer of the film. May be. Further, the planned opening portion 10 may be provided with a display for indicating to the user that it is an opening location by printing or the like.

  Next, the trunk | drum film 1 and the bottom film 2 which comprise the packaging bag P are demonstrated. The trunk | drum film 1 and the bottom film 2 contain a plastic film at least, and can contain a base material layer and a sealant layer, for example. As a material constituting the base material layer, for example, polyethylene terephthalate (PET), polypropylene (PP), polyamide (PA) such as nylon, or the like can be used. For example, polyethylene (PE) or polypropylene (PP) can be used after the sealant layer is formed. The thickness of the trunk | drum film 1 and the bottom part film 2 can be 80-200 micrometers, for example.

  The trunk film 1 and the bottom film 2 may further include an intermediate layer between the base material layer and the sealant layer. As the intermediate layer, an appropriate one can be selected according to required performance such as water vapor and other gas barrier properties, light shielding properties, various mechanical strengths and the like. For example, as the intermediate layer, a metal foil layer, a vapor deposition layer of a metal, an inorganic oxide, or a metal oxide can be provided. By providing such an intermediate layer, it is possible to prevent oxygen and water vapor from entering the inside of the packaging bag P. A stretched nylon film may be provided as the intermediate layer. In this case, the puncture resistance of the packaging bag can be improved.

  It is preferable that the base material layer of the trunk | drum film 1 and the bottom part film 2 is extended | stretched, and at least any one of the base material layer of the trunk | drum film 1 or a sealant layer is extended in the extending | stretching direction 10 of the one direction. By making it coincide with the direction, it is possible to easily form an opening at the outlet 7. Furthermore, in at least one of the base material layer and the sealant layer of the body film 1, it is possible to make it easy to cut the knob by extending the direction orthogonal to one direction.

  The packaging bag P in FIG. 1 is sold in a sealed state filled with contents, and is opened at the time of use. At this time, with the upper and lower sides of the notch 11 being picked, the left side seal part 3 is torn along the planned opening 10 toward the through hole 9 in the lateral direction. By this tearing operation, an opening is formed in the outlet 7, but the outer edge of the lower portion 9 b of the through hole 9 of the partition wall seal portion 8 has an arc shape, so that the tear propagates in the lateral direction and the downward direction. This can be suppressed. Furthermore, since the upper portion 9a of the through hole 9 is tapered toward the upper side, the tearing can be easily guided upward, and the knob 12 can be easily cut as shown in FIG. Therefore, the picking piece 12 does not hinder the removal of the contents.

  As mentioned above, although embodiment of this invention was described in detail, the packaging bag by this invention is not limited to above-described embodiment at all, and various changes are possible in the range which does not deviate from the meaning of this invention. is there.

  For example, in the above-described embodiment, the packaging bag P in a state where the contents are not filled is described as a vertically long rectangular packaging bag as viewed from the front, but is not limited to this, for example, from the front The square shape can be seen. In addition to a standing pouch, a flat pouch (three-side sealed bag, four-side sealed bag, etc.) can be used. In the above description, the standing pouch is composed of three laminated films. However, the standing pouch may be composed of one or two sheets.

P packaging bag 1 body film 2 bottom film 3, 4 side seal part 5 bottom seal part 6 upper seal part 7 outlet 8 partition seal part 9 through hole 9a upper part 9b lower part 10 opening planned part 11 notch 12 knob Piece L1 Outer seal line of the partition seal portion L2 Inner seal line of the partition seal portion L21 First portion L22 Second portion r Radius Sa Main space Sb Upper space Sc Extraction passage

Claims (1)

  A bag made by heat-sealing a film and having at least a front side surface and a back side surface, and a storage bag for containing contents is defined by being surrounded by the film. The side seal portion and the one side seal portion define a take-out port and have a partition seal portion provided so as not to reach the lower end of the accommodation space, and the partition seal portion has a through-hole. The through-hole is composed of an upper part and a lower part, the upper part has a tapered shape toward the upper side, and the outer edge of the lower part has an arc shape. Characteristic packaging bag.

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