JPH07172469A - Liquid-packaging pouch - Google Patents

Abstract

PURPOSE:To offer a safe and sanitary liquid-packaging pouch with a tear-off top end to make an opening which is limited to a suitable size for discharging the contents and which prevents the contents from splashing when the top end is torn off. CONSTITUTION:A pouch is designed to discharge the contents through an opening formed by tearing off A part along its adhered top end 1. The pouch has two sealing lines: a vertical sealing line 2 which runs down, desirably at an angle with respect to a vertical line, from a point on the top end 1 and which has such a width that does not virtually increase the tear resistance, and a horizontal sealing line 3 which connects the vertical sealing line 2 to one side end. Such sealing lines limit the size of a discharge opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid packaging bag in which the contents can be discharged by forming a discharge port by tearing and cutting the upper edge adhesive portion of a sealed bag.

[0002]

2. Description of the Related Art Conventionally, shampoos, rinses, liquid detergents, etc. have been sold in bottle-like containers, but in recent years, from the viewpoint of resource protection, flexible bags made of plastic film for refilling. For example, self-standing bags filled with contents and sealed are sold. Then, the consumer opens the bag and transfers the contents to a bottle-shaped container or the like for use. Also, containers for liquid chemicals and oils for industrial use are being replaced by flexible bags made of plastic film depending on the use.

[0003] In general, these bags are provided with a spout or have a predetermined size (small) so that the contents filled in a large amount can be easily transferred to another container or the like. The structure is such that a discharge port is formed. And among the means to facilitate the discharge of the contents,
A simple method is to form a seal line that limits the size of the outlet so that when the opening portion of the bag (generally the upper edge of the bag) is cut off, the outlet becomes a small outlet. Has been done.

For example, in Japanese Utility Model Laid-Open No. 57-64462 and Japanese Utility Model Laid-Open No. 61-111561, tearing can be performed linearly at the time of opening, and the upper edge of the bag is formed so that the opening is formed small. A sealing line parallel to and partially unsealed.

Further, in Japanese Utility Model Laid-Open No. 57-107745, by changing the shape of the seal line at the upper edge bonding portion,
A bag is shown adapted to limit the size of the opening formed.

According to the above-mentioned bag, when the upper edge portion of the bag is cut out and opened, a discharge port having an appropriate size is formed, so that the contents can be easily discharged, for example, the contents can be transferred to the container. It can be carried out.

[0007]

However, in the above-mentioned conventional bag, when the upper part of the bag is cut off, the liquid, which is the content of the bag, is splashed and may hit the user.

This is because the tear resistance of the seal portion of the bag is stronger than that of the other portions, and therefore, when cutting the upper portion of the bag, the tear speed is rapidly increased when the tear position moves from the unsealed portion to the sealed portion. This is because it changes to (becomes slower). And it is fully expected that the larger the opening, the more the contents will be splashed. On the other hand, in the case where the opening is limited to a small size as described above, direct splashing is small, but if the contents adhere to the vicinity of the opening,
A splash will occur.

In particular, when the portion to be torn is continuously provided with the contents storing portion as in Japanese Utility Model Laid-Open No. 57-64462, it is often seen that the contents are contained in the portion. It bounces.

If the contents are just water, there is no problem, but if not, there is a problem that the surroundings are contaminated or the clothes are stained. When the content is an acid, an alkaline substance, a harmful substance, or the like, the above splashes must be prevented in advance for safety and hygiene.

Therefore, the present invention is a packaging bag for storing a liquid and cutting the upper part thereof for use, wherein the opening is limited to a size suitable for discharging the contents, and at the time of the above-mentioned cutting. Safe to use with no content splashing
It provides a hygienic packaging bag.

[0012]

Means for Solving the Problems That is, the present invention relates to a liquid packaging bag in which a discharge port is formed by tearing and cutting the portion along the upper edge adhesive portion of the bag so that the contents can be discharged. A vertical seal line formed by forming a vertical seal line that hangs down from a point on the upper edge adhesive portion and a horizontal seal line that is connected to the vertical seal line and reaches one side edge of the bag. The packaging bag for liquid is characterized in that it is formed to have a thinness that does not substantially increase the tear resistance, preferably a thinness of 1 to 2 mm.

In the present invention, the vertical seal line and the horizontal seal line connected to the vertical seal line are other seal lines, for example, a seal line on the side edge of the bag, or a vertical seal line formed separately from the vertical seal line. It is preferable that the discharge portion is formed together with the horizontal seal line connected to this, and the vertical seal line is formed so that the discharge portion tapers toward the upper edge adhesive portion.

The angle formed by the vertical seal line and the upper edge adhesive portion is preferably in the range of 30 ° to 60 °.

[0015]

According to the present invention described above, since the vertical seal line is formed to have a thinness that does not substantially increase the tear resistance at the time of tearing, the tearing for opening the bag and forming the discharge port is smooth. To be done. The size of the discharge port is limited by the vertical seal line and the horizontal seal line connected to the vertical seal line and reaching one side edge of the bag, and the contents of the storage unit are prevented from jumping out of the bag. .

The vertical seal line forms a discharge part together with other seal lines. When the vertical seal line is formed so that the discharge part tapers toward the upper edge bonding part, The contents attached to the discharge part are easily returned to the storage part of the bag, and a large amount of contents are prevented from adhering to the part. Moreover, by doing so, the operation of discharging the contents becomes easy.

[0017]

The present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the packaging bag of the present invention, and FIG. 2 is a plan view showing an opened state of the embodiment.

The packaging bag of the present invention is formed by stacking two flexible packaging materials mainly composed of a plastic film and heat-sealing the four edges. In addition, a product obtained by folding one of the above-mentioned packaging materials in two and heat-sealing the three peripheral edges is also included. Further, it also includes the shape of a so-called self-standing bag (standing pouch).

The packaging material 10 used is, for example, as shown in FIG. 5, a laminate of a strong outer layer film 11 and a heat-sealable inner layer film 12 by a well-known method. Depending on the situation, the intermediate layer 13 such as a gas barrier resin layer may be laminated. In addition, the packaging material 10 preferably contains a tearable film (for example, a stretched plastic film, an aluminum foil, or the like) in order to improve the tearability.

As the outer layer film 11, a stretched nylon film, a stretched polyethylene terephthalate film,
A stretched polypropylene film or the like can be used. As the inner layer film 12, a low density polyethylene film, an unstretched polypropylene film, a linear low density polyethylene film or the like can be used. These films can be appropriately laminated by a dry laminating method or another laminating method. Moreover, you may form the printing layer 14 in the packaging material 10 as needed.

In the packaging bag of the present invention, one of the above-mentioned peripheral edge adhesive portions is considered as the upper edge adhesive portion 1 and a discharge port is formed by cutting the portion along the upper edge adhesive portion 1. There is a feature in the seal line that limits the size of the discharge port.

That is, as shown in FIG. 1, a feature of the present invention is that a vertical seal line 2 hangs down from one point at an appropriate position on the upper edge adhesive portion 1 and one of the bags connected to the vertical seal line 2. The horizontal seal line 3 reaching the side edge 4 of the vertical seal line 3 is formed, and the vertical seal line 2 is formed to have a thinness that does not substantially increase the tear resistance.

The vertical seal line 2 is formed by heat sealing, and its thickness is preferably 1 to 2 mm. If it is thin, the strength of the seal line is weak, and the vertical seal line 2 may be broken (peeled) due to the weight of the contents during transportation, for example. On the other hand, if it is thicker than this, the tear resistance becomes too large and the object of the present invention cannot be achieved.

The angle θ formed by the vertical seal line 2 and the upper edge adhesive portion 1 is preferably 30 ° to 60 °. With such an angle θ, the discharge portion 6 formed by the vertical seal line 2 and the side edge seal line 42 of the bag has a tapered shape as shown in the drawing, which facilitates discharge of the contents and further The contents attached to the discharge part 6 easily return to the storage part of the bag, and a large amount of contents are prevented from adhering to the part.

In the embodiment of FIG. 1, the vertical seal line 2 and the side edge seal line 42 form the discharge portion 6, but as shown in FIG. 3, another vertical seal line 21 and a horizontal seal line are used. The line 31 may be formed, and the vertical seal line 2 may form the discharge portion 6. In this case, the vertical seal line 21 needs to be thin enough not to increase the tear resistance, like the vertical seal line 2. Further, although the horizontal seal lines 3 and 31 are formed in parallel with the upper edge bonding portion 1 in FIGS. 1 and 3, they are not necessarily required.

The embodiment shown in FIG. 1 is in the form of a so-called self-standing bag, and the embodiment shown in FIG. 3 is a four-sided sealed bag in which two packaging materials are heat-bonded. ,
It can also be applied to a bag obtained by folding one packaging material in two, a so-called three-sided sealed bag, or the like. FIG. 3 shows such a three-way seal bag, and the side edge 4 located on the right side of the figure is a bent portion. Also in such a bag, the vertical seal line 2 and the horizontal seal line 3 can be provided in the same manner as in the embodiment of FIG.

In any of the embodiments, if necessary,
A well-known opening start means 7 such as an I notch or a V notch that triggers opening can be provided. The formation position is preferably the side edge seal line 42 corresponding to the portion to be opened.

The packaging bag of the present invention formed as described above can be easily torn from the opening means 7, as shown in FIG.
The outlet 5 can be formed as shown in FIG. At the time of this opening, the vertical seal line 2 (the vertical seal line 2 and the vertical seal line 21 in the embodiment shown in FIG. 3) is opened. Two
Since 1) is thinly formed, the resistance to tearing is not increased and smooth opening is possible.

<Example> In order to prepare the packaging bag of the present invention, the following two types of packaging materials having tearability were prepared. Packaging material 1: 15-μm-thick stretched nylon film (manufactured by Unitika Ltd., trade name: ONM), 25-μm-thick stretched polyethylene film (Tocello Corporation), 100-μm-thick linear low-density polyethylene film (Tama Poly Co., Ltd.) Company-made, product name: LC-205C) were laminated by a dry lamination method (adhesive: Takeda Pharmaceutical Co., Ltd., Takelac A515 / A50). Packaging material 2: Stretched nylon film having a thickness of 15 μm (manufactured by Unitika Ltd., trade name: XC), stretched polypropylene film having a thickness of 25 μm (manufactured by Nisseki Plast Co., Ltd.), linear low-density polyethylene film having a thickness of 100 μm ( (Tamapoli Co., Ltd., trade name: LC-205TC)
Were laminated by a dry laminating method (adhesive:
Takerak A515 / A5 manufactured by Takeda Pharmaceutical Company Limited
0).

Using the above packaging material, a height of 300 mm,
A standing pouch having a width of 150 mm was prepared. 1000 ml of water as contents from the upper opening of this packaging bag
It was filled and then heat-sealed in the shape shown in FIG. At this time, the width of each of the upper edge bonded portion and the side edge seal line was 10 mm, the width of the vertical seal line was 1.5 mm, and the width of the horizontal seal line was 5 mm. The intersection of the upper edge adhesive and the vertical seal line is 65 mm from the left end of the figure, the angle between the vertical edge and the upper edge adhesive is about 60 °, and the position of the horizontal seal line is from the upper edge. The length of the horizontal seal line is 40 mm, and the length is about 65 mm.

On the side edge sealing line of the packaging bag obtained as described above, a V notch was provided at a position of about 20 mm from the upper end and the V notch was opened. At this time, the state of tearing and the presence or absence of liquid splash were observed. The results are shown in Table 1.

For comparison, Comparative Example 1 was prepared which was the same as the above Example except that the thickness of the vertical seal line was 10 mm. Also, the vertical seal line, the horizontal seal line of the above embodiment,
Comparative Example 2 was prepared in the same manner except that the upper edge bonded portion and the portion surrounded by the side edge sealing line were all sealed.

The comparative examples 1 and 2 were evaluated in the same manner as in the example. The results are shown in Table 1.

For the evaluation of the tear state, the number corresponding to the following criteria was displayed. 10 measurement samples each
It is 0. Level 1: It can be cut off by applying force at the beginning of the tear Level 2: The tear is interrupted more than once during the tear,
Requires new power Level 3: The tear is interrupted one or more times during the tear,
Difficult to tear even with new force

[0035]

[Table 1]

As is clear from the above results, the packaging bag of the present invention is easy to tear and has no splash of contents. On the other hand, in the comparative example, tearing was worse than in the present invention, and liquid splash was also observed.

[0037]

As described above, the packaging bag of the present invention is
Since the vertical seal line that restricts the opening is formed with a thickness that does not substantially increase the tear resistance, there is no catching when tearing for opening, so there is no liquid in the contents, Even if a toxic substance is packaged as a product, it can be safely used.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a packaging bag of the present invention.

FIG. 2 is a plan view showing an opened state of the embodiment shown in FIG.

FIG. 3 is a plan view showing another embodiment of the present invention.

FIG. 4 is a plan view showing still another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an example of a packaging material used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper edge adhesion part 2 ... Vertical sealing line 3 ... Horizontal sealing line 4 ... Side edge 5 ... Discharge port 6 ... Discharge part 7 ... Unsealing start means 10 ... Packaging material 42 ... Side edge seal line

Claims (8)

[Claims] 1. A liquid packaging bag in which a discharge port is formed by tearing and cutting the portion along an upper edge adhesive portion of the bag so that the contents can be discharged from a point on the upper edge adhesive portion. A vertical seal line that hangs down and is connected to the vertical seal line,
A bag formed with a horizontal seal line reaching one side edge of the bag, wherein the vertical seal line is formed into a thinness that does not substantially increase tear resistance. Packaging bag. 2. The vertical seal line and the horizontal seal line connected thereto form a discharge part together with other seal lines, and the vertical seal line is tapered so that the discharge part tapers toward the upper edge bonding part. It is formed, The claim 1 characterized by the above-mentioned.
The packaging bag for liquid according to. 3. The packaging bag for liquid according to claim 2, wherein the other sealing line is a side edge sealing line of the bag. 4. The liquid packaging bag according to claim 2, wherein the other seal lines are a vertical seal line formed separately and a horizontal seal line connected to the vertical seal line. 5. The liquid packaging bag according to claim 2, wherein an angle formed by the vertical seal line and the upper edge adhesive portion is in the range of 30 ° to 60 °. 6. The liquid packaging bag according to claim 1, wherein the vertical seal line is in the range of 1 to 2 mm. 7. The liquid packaging bag according to claim 1, which is formed from a packaging material containing a tearable film. 8. The tearable film is either a stretched film or an aluminum foil,
The liquid packaging bag according to claim 7.