JP2013039932A - Packaging bag with spout - Google Patents

Abstract

Disclosed is a packaging bag with a spout in which the spout is difficult to be opened by mistake.
A packaging bag 10 in which an unsealed portion 15 serving as a flow path of a spout 14 is provided at an upper corner of the packaging bag, and the two films 11 and 11 including the spout 14 include: An opening guide line 18 made of a half-cut line provided so as to cross the unsealed portion 15 is provided, and an end of the opening guide line 18 on the opening start side is provided in the seal portion above the unsealed portion 15. The end of the opening guide line 18 on the opening end side is located within a range of 0.5 to 2.0 mm from the side end of the packaging bag 10.
[Selection] Figure 1

Description

  The present invention relates to a packaging bag with a spout in which an unsealed portion serving as a flow path for a spout is provided at an upper corner of the packaging bag.

A packaging bag provided with a spout is widely used, for example, in a packaging bag (pouch) for storing contents for refilling in order to facilitate the pouring of the contents.
In addition, the outlet of this type of pouch is provided with a combination of a notch and a half-cut line by laser light irradiation as an easy-opening means (see, for example, Patent Document 1).

JP 2006-273338 A

  However, although the spout can be easily opened by the easy-opening means, there is a problem that the spout is opened by mistake due to damage to the half-cut wire during packing and distribution of the pouch.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the packaging bag with a spout which a spout is hard to open accidentally.

In order to solve the above-mentioned problems, the present invention is a packaging bag in which an unsealed portion serving as a flow path for a spout is provided at an upper corner of the packaging bag, and the two films including the spout An opening guide line made of a half-cut line provided to cross the unsealed portion is provided, and an end of the opening guide line on the opening start side is provided in a seal portion above the unsealed portion. The opening end side end portion of the opening guide line is located within a range of 0.5 to 2.0 mm from the side end of the packaging bag.
In the seal portion above the unsealed portion, a cut line formed by penetrating the two films for starting the opening is started from the upper side of the packaging bag toward the flow path, and in the vicinity of the flow path. A cutting line having a planar shape is provided that extends obliquely upward along the flow path by changing the direction, and further extends toward the opening start side end of the opening guide line by changing the direction. It is preferable.
It is preferable that an end portion on the unsealing end side of the unsealing guide line is provided in a seal portion on the side of the unsealed portion.

  According to the present invention, a spout of a packaging bag with a spout is not easily opened by mistake, and handling during packaging and distribution becomes easy.

It is a top view which shows one example of a packaging bag with a spout of this invention. It is the elements on larger scale which show the vicinity of the spout of the packaging bag with a spout shown in FIG. It is a partial enlarged plan view which shows the vicinity of the spout of the packaging bag with a spout of the comparative example. It is a top view explaining an example of the method of measuring the tear strength of a half cut line.

The present invention will be described below based on preferred embodiments with reference to the drawings.
As shown in FIGS. 1 and 2, the packaging bag 10 of the present embodiment is folded in two with the two body films 11 and 11 having the same planar shape and the folding line 12a as the center line. A standing pouch composed of a bottom film 12. As shown in FIG. 1, the bottom film 12 is folded between the lower portions of the pair of body films 11 and 11 so that the fold line 12a is inward.
The packaging bag 10 is formed with side end seal portions 11a and 11b along the left and right side edges, respectively, and the body film 11 and 11 and the bottom film 12 are connected to each other at the lower portion of the packaging bag 10. The bottom seal portion 12b is formed by heat-sealing between the lower end edges of the opposing surfaces.

  As films used as the body film 11 and the bottom film 12, those conventionally used, for example, films made of biaxially stretched polypropylene, biaxially stretched polyamide, biaxially stretched polyester, etc. are used as base films, and these films A laminate in which a polyolefin resin such as low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, and polypropylene is laminated as a sealant layer on a base film is used. Examples of the method for producing the laminated film include a dry laminating method, an extrusion laminating method, and a coextrusion method. An adhesive or an anchoring agent can be provided between the base film layer and the sealant layer in order to improve the adhesive strength. In this case, a plurality of substrate films may be laminated in order to increase the strength of the packaging bag. Alternatively, a metal foil such as an aluminum foil, a metal vapor-deposited layer, an inorganic vapor-deposited layer such as ceramic, an ethylene-vinyl alcohol copolymer film, or the like may be laminated in order to improve the barrier property against gas or ultraviolet rays.

Although the dimension of the packaging bag 10 is not specifically limited, As a suitable range as a container for refilling, the height of the packaging bag 10 is about 100 to 500 mm, the width of the packaging bag 10 (the maximum width between both ends) ) Is about 70 to 300 mm, and the filling amount of the contents is about 100 to 5000 cm ³ .
The contents are not particularly limited, and examples thereof include liquids, solids such as powders and granules, viscous bodies, liquids, and mixtures thereof.

As shown in FIGS. 1 and 2, an unsealed portion 15 serving as a flow path for the spout 14 is obliquely above the packaging bag 10 between the upper corner of the packaging bag 10, that is, between the upper side 14 a and the side end 14 b. It is provided to face.
In the case of this embodiment, the spout 14 includes flow path forming seal portions 15a and 15b that constitute both sides of the flow path after opening, a flow path sealing seal portion 15c that seals the flow path before opening, and being opened. A pull tab 16 serving as a knob is formed by heat-sealing the body films 11 and 11 continuously from the upper part of the side end seal part 11b.

The flow path forming seal portions 15a and 15b define both sides of the flow path when the front end portion of the spout 14 is removed and the flow path is opened. That is, the unsealed part 15 between one flow path forming seal part 15a and the other flow path forming seal part 15b becomes a flow path.
One flow path forming seal portion 15a is provided above the unsealed portion 15 (between the upper side 14a), and the other flow path forming seal portion 15b is located on the side of the unsealed portion 15 (with the side end 14b). Between).
The front end portion of the unsealed portion 15 is closed by the flow path sealing seal portion 15c. A space between the flow path forming seal portion 15 a and the side end seal portion 11 a is opened as a filling port 13, and the packaging bag 10 can be filled with contents through the filling port 13. In addition, after filling the contents, the filling port 13 is closed by heat-sealing the body film 11, 11 at the periphery of the filling port 13.

  In order to facilitate opening, the spout 14 has an opening guide line 18 made of, for example, a half cut line formed by a laser so as to cross the unsealed portion 15 serving as a flow path, and one end of the opening guide line 18. A pull tab (knob) 16 formed by a cut line 17 is provided on the side. The opening guide line 18 is preferably provided on each of the two body films 11 and 11 including the spout 14.

A cutout line 17 for starting opening is provided in the seal portion 14c above the unsealed portion 15 serving as a flow path (between the upper side 14a). The cut line 17 starts from the upper side 14a toward the flow path, extends perpendicularly to the upper side 14a, changes direction near the flow path, and extends obliquely upward along the flow path. It has a planar shape extending toward the end 18a on the opening start side of the opening guide line 18 by changing the direction.
Further, the seal portion 14 c above the unsealed portion 15 can be cut off by leaving a flow path forming seal portion 15 a having a predetermined width with the unsealed portion 15 by the cut line 17. The portion where the cut line 17 extends along the flow path forms a spout that protrudes after opening while securing the seal width of the flow path forming seal portion 15a between the unsealed portion 15 and the cut line 17. As shown, it is provided in the vicinity of the unsealed portion 15.

The cut line 17 is preferably provided with one or a plurality of joints (uncut portions) 17b and 17c. The width of the joints 17b and 17c (the gap length between the ends of the adjacent cut lines) depends on the material of the body film 11, but it can be easily separated by hand at the time of opening, for example 0.5 About 1.5 mm is mentioned.
In the case of the present embodiment, there is no joint in the portion where the cut line 17 changes its direction and extends obliquely upward along the unsealed portion 15, and the cut line is continuous.
Further, a notch 17a made of, for example, a V-shaped notch is provided at a position where the cut line 17 starts at the upper side 14a.

  The cut lines 17 are formed as cut lines (penetrating scars) formed through the two body films 11 at portions other than the joints 17b and 17c. For this reason, at the time of opening, the pull tab 16 can be formed only by pulling apart the joints 17b and 17c. By providing the joints 17b and 17c, it is possible to prevent the opening guide line 18 from being inadvertently torn by being caught by the pull tab 16 when not in use. By pulling and pulling the pull tab 16 at the time of opening, the tearing force of the hand can be transmitted sufficiently well to the body film 11 when starting the tearing of the spout 14 along the opening guide line 18.

  In the case of this embodiment, an end 18 a on the opening start side of the opening guide line 18 is close to or intersects with the cut line 17. The end 18a on the opening start side may be separated from the cut line 17. The end 18a on the opening start side can also have an opening that opens in a C shape toward the end of the cut line 17. In this case, the opening angle of the opening is preferably about 60 to 120 °, and the opening width is preferably about 3 to 7 mm.

  When opening the packaging bag 10 of the present embodiment, first, the joints 17b and 17c of the cut line 17 are broken to separate the pull tab 16 from the flow path forming seal portion 15a. Then, the pull tab 16 is pinched to start tearing, and the cut is advanced along the opening guide line 18 from the upper side of the unsealed portion 15 to the side. Thereby, the flow path sealing seal 15c is separated, and an opening is formed in the flow path. Further, by continuing the tearing of the opening guide line 18 beyond the end 18b on the opening end side to the side end 14b, the flow path sealing seal 15c and the flow path forming seal 15b are disconnected. .

An unsealed guide line unformed portion 19 is formed between the unsealed end portion 18b of the unsealed guide line 18 and the side end 14b of the packaging bag. Accordingly, it is possible to prevent the opening guide line 18 from being unintentionally started from the side end 14b side, and handling during packaging and distribution is facilitated. For this purpose, it is desirable to secure a certain length of the unsealed guide line unformed portion 19. However, if the end portion 18b on the opening end side is too far from the side end 14b, that is, if the unsealed guide line unformed portion 19 is too long, it is difficult to continue tearing to the side end 14b at the time of opening, and the flow path sealing seal There is a possibility that it becomes difficult to separate the portion 15c. For this reason, it is preferable that the opening end 18b of the opening guide line 18 is located within a range of 0.5 to 2.0 mm from the side end 14b of the packaging bag. That is, it is preferable that the length of the unsealed guide line-unformed portion 19 is in the range of 0.5 to 2.0 mm.
Moreover, it is preferable that the side end 14b of a packaging bag does not contain a notch in the unsealed guide line unformed part 19 and its vicinity.

  The end 18b of the unsealing end of the unsealing guide line 18 is preferably provided at a side seal 14d (the flow path forming seal 15b and the vicinity thereof) of the unsealed portion 15. In this case, compared with the case where the end 18b is provided in the unsealed portion 15, it is easy to continue tearing to the side end 14b at the time of opening, and it is possible to suppress uncut portions of the flow path sealing seal portion 15c. it can.

  In the packaging bag 10 of the present embodiment, a shape-retaining material (not shown) such as a tube can be provided in the unsealed portion 15 serving as a flow path. In this case, the body films 11 and 11 are separated from each other, and the expanded state of the flow path can be maintained at the time of pouring. Although not particularly shown, it is preferable that the body films 11 and 11 are provided with a bulging portion that bulges outward around the shape retaining material. This bulging portion is preferably formed in advance (before putting the shape-retaining material) on the body films 11 and 11 by vacuum forming or pressure forming in the process of manufacturing the packaging bag.

Examples of the material constituting the shape retaining material include polyolefin resins such as polyethylene, polypropylene, and ethylene vinyl acetate copolymer (EVA), and synthetic resins such as polyamide, polyester, polystyrene, and polycarbonate. Of these, polyolefin resins such as polyethylene, polypropylene, and EVA are preferable from the viewpoint of heat bonding with the sealant layer on the inner surface of the body film 11 by heat sealing.
The shape of the shape-retaining material is not limited to a tube having both ends opened, such as a cylindrical body, an elliptical cylindrical body, or a rectangular cylindrical body having a square cross section. Various forms such as a rod-shaped body having a shape, a polygon such as a triangle or a quadrangle, a U-shaped cross-section, an H-shape, and a T-shape can be employed. The shape-retaining material preferably has a shape with a constant cross-section in the longitudinal direction so as not to block the flow path (such as a cylindrical body or a rod-shaped body), and is easy to fix to the film and does not hinder the flow of contents. The cylindrical body is more preferable, and among them, the cylindrical body is more preferable because the surface to be fixed is free and positioning when fixing to the film is easy. In fixing, it is desirable to align the longitudinal direction of the shape-retaining material with the direction of the flow path.
In the present invention, the shape-retaining material and the surrounding bulge are not essential, and the shape-retaining material may be omitted. When the shape retaining material is provided, it is preferable that the opening guide line 18 is provided at a position that does not intersect the shape retaining material. Thereby, the shape-retaining material is not caught or exposed at the time of opening.
The shape-retaining material is preferably located at least 0.3 mm away from the opening guide line 18 and the closest distance between the shape-retaining material and the opening guide line 18 is in the range of 0.3 to 10 mm. It is preferable.

As mentioned above, although this invention has been demonstrated based on suitable embodiment, this invention is not limited to the above-mentioned example, Various modifications are possible in the range which does not deviate from the summary of this invention.
For example, the spout of the packaging bag may have a shape in which the tip portion projects from the upper side of the packaging bag. The spout in this case preferably has a shape that surrounds both sides of the spout with substantially vertical sides, like the upper side 14a and the side end 14b of the packaging bag 10 of the above embodiment.
The bottom film is not essential, and the packaging bag may be a flat bag such as a three-side sealed bag or a four-side sealed bag. Alternatively, a folded film such as the bottom film 12 may be interposed on the side of the packaging bag, for example, on the side opposite to the spout 14 (the right side in FIG. 1).

Hereinafter, the present invention will be specifically described in comparison with Examples and Comparative Examples.
As shown in FIG. 2, the packaging bag 10 of Example 1 in which the opening guide line unformed portion 19 is provided by separating the position of the opening end side 18 b of the opening guide line 18 from the side end 14 b of the packaging bag. As shown in FIG. 3, the packaging bag 100 of the comparative example 1 which produced the opening guide line 18 to the side end 14b was produced. The materials and dimensions were the same except for the unopened guide line forming portion 19.
The length of the unsealed guide line portion 19 of Example 1 was set to a predetermined length (2.0 mm) within a range of 0.5 to 2.0 mm.
For Example 1 and Comparative Example 1, the tear strength in the forward direction (arrow N in FIG. 4A) and reverse direction (arrow R in FIG. 4B) of the unsealing guide line 18 was measured.

(Measurement method of tear strength)
As shown in FIG. 4, reinforcing adhesive tapes 21 and 22 are attached to the upper side and the lower side of the opening guide line 18 respectively along the opening guide line 18, and the ends of these reinforcing adhesive tapes 21 and 22 are separately provided. Clamp with a gripping tool (not shown). In the packaging bag with the sample spout, the joints 17b and 17c of the cut line 17 are cut so that the pull tab 16 is exposed between the reinforcing adhesive tapes 21 and 22.
The pulling direction of the two grips (arrows A and B in FIG. 3) is set to be substantially perpendicular to the plane formed by the packaging bag and opposite to each other at a speed of 1000 mm / min. The spout 14 is torn along. At this time, the tear force (unit: Newton) applied to the sample is measured, and the value of the tear force is taken as the tear strength (unit: Newton).
The reinforcing pressure-sensitive adhesive tapes 21 and 22 need not be torn against the end of the packaging bag while being pulled by the gripping tool. In this measurement method, cloth adhesive tapes were used in an overlapping manner.
Table 1 shows the measurement results.

  As shown in Table 1, the packaging bag 10 of Example 1 having the unsealed guide line unformed portion 19 at the side end 14b can increase the tension of the gripping tool until the reinforcing adhesive tapes 21 and 22 are peeled off. It was confirmed that tearing was not possible from the reverse direction.

A, B ... tension direction of the gripping tool, N ... forward tearing direction, R ... reverse tearing direction 10, 100 ... packaging bag, 11 ... trunk film, 11a, 11b ... side end seal part, 12 ... Bottom film, 12a ... folding line, 12b ... bottom seal part, 13 ... filling port, 14 ... spout, 14a ... upper side, 14b ... side end, 15 ... unsealed part which becomes a flow path, 15a, 15b ... flow path formation Seal part, 15c ... Flow path sealing seal part, 16 ... Pull tab (knob), 17 ... Cut line, 17a ... Notch, 17b, 17c ... Joint (uncut part), 18 ... Opening guide line, 18a ... Opening start side , 18b... End portion on the opening end side, 19... Unopened guide line forming portion, 21, 22.

Claims (3)

A packaging bag provided with an unsealed portion serving as a flow path for a spout at the upper corner of the packaging bag,
The two films including the spout are provided with an opening guide line made of a half cut line provided so as to cross the unsealed portion,
An end portion on the opening start side of the opening guide line is provided in a seal portion above the unsealed portion, and an end portion on the opening end side of the opening guide line is 0.5 to 5 from the side end of the packaging bag. A packaging bag with a spout, which is located within a range of 2.0 mm.   In the seal portion above the unsealed portion, a cut line formed by penetrating the two films for starting the opening is started from the upper side of the packaging bag toward the flow path, and in the vicinity of the flow path. A cutting line having a planar shape is provided that extends obliquely upward along the flow path by changing the direction, and further extends toward the opening start side end of the opening guide line by changing the direction. The packaging bag with a spout according to claim 1.   The packaging bag with a spout according to claim 1 or 2, wherein an end portion of the unsealing guide line on an unsealing end side is provided in a side sealing portion of the unsealed portion.

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